CN1546868A - High potential ratio, inner antifriction, centripetal supercharging centrifugal pump and its combined method of technology and examples - Google Patents

Abstract

The invention is a kind of eccentric pump with high potential ratio, inner antifriction and centripetal booster, and the compound method and example, which belongs to eccentric pump technology field of vane mechanism. The vane of the wheel is L type, the flow channel orients to reverse tangential and output from a small aperture, the speed is slow; there distributes with even speed in the vane slot in order to restrain the relative gyre; the end cavity of the vane wheel is charged with air and realize gas phase friction. The consumption reduces about a grade. It uses a centripetal booster model made up of inner gyre channel centripetal guide wheel and different vane wheels, it combines with the front and back and single-grade and multi-grade universal symmetrical end cap model into single-grade and multi-grade pump, the efficiency is high, the cost is decreased greatly.

Description

High potential ratio, inner antifriction, centripetal boosting centrifugal pump and technical combinations method and example

[definition]

Absolute velocity---fluid particle is with respect to the movement velocity of static casing in the centrifugal pump.

Relative velocity---fluid particle is with respect to the movement velocity of rotary blade in the centrifugal pump.

The velocity of following---the impeller of Fluid Motion Driven By Moving is with respect to the movement velocity of static casing in the centrifugal pump.

Synchronizing speed---in the centrifugal pump runner, circumferential component velocity equals the flow stream velocity of the same radial coordinate place velocity of following.

Than merit---centrifugal pump impeller is to the fluid institute work of the unit mass of the leaf groove of flowing through.

The mechanical energy that the fluid of specific energy---unit mass has, difference potential energy and kinetic energy time-division claim than potential energy and compare kinetic energy.

The ratio of gesture lift---fluid the institute pressure increment that obtains and acceleration of gravity in impeller channel, pressure increment equals the stream of unit mass

The algebraical sum of the centrifugal force merit that body is accepted and himself kinetic energy of relative motion decrement.

The fluid of moving lift---unit mass obtains the ratio of kinetic energy increment and acceleration of gravity in impeller channel, this increment is at air deflector

In finish pressure head conversion, calculate by the absolute velocity in the rest frame.

The ratio of the moving ratio of gesture---impeller output gesture lift and the moving lift of output, or than potential energy increment and ratio than kinetic energy increment, be called for short the gesture ratio.

Degree of reaction---impeller is exported than the ratio of potential energy with the delivery ratio merit, moves each other monotonic increasing function of ratio with gesture.

The ratio of the ratio kinetic energy that effective ratio merit and the foundation impeller circumferential speed of pressure coefficient---impeller conveying calculates.

Specific revolution---convey unit claims again likeness coefficient than the rotating speed of the geometric similarity unit impeller of merit and unit volume flow.

Vortex---fluid-phase is limited blade for the periphery reverse vortex motion of rotating coordinate system in the centrifugal pump impeller runner relatively

A kind of fluid inertia motion morphology under the weak shear constraint has significant impact to the distribution of relative velocity field.

Local excitation---incompressible fluid is subject to the less Impulse of acting surface in the unconfinement direction, occurs in the acting surface neighborhood

The motion of non-potential barrier, such as strike waters with stone, waterfall stream, stirring and liquid flow section are steep expands etc.

Complete constraint---the fluid constraint without local excitation possibility for example, has the incompressible fluid of free or weak restrained boundary,

The acting surface that it is possible and forward direction neighborhood are surrounded by the rigid plane with this acting surface quadrature.

Wall attachment effect---when pressure and wall curvature were suitable, the incompressible fluid of certain flow rate attached wall and flows its not separation of flow

Condition is that the wall absolute pressure is greater than saturated pressure.

The centrifugal pump impeller of the moving specific output of high potential ratio impeller---a kind of high gesture, its runner is complete constraint, has low, the anti-phase of flow velocity

To vortex, without backflow and the separation of flow, isobaric, all characteristics of the linear throttling of kinetic energy feedback of circumference cylinder constant speed.

Feedback speed reducing ratio---the high potential ratio impeller traditional method of indicating the pronunciation of a Chinese character claims again the feedback work done factor to the ratio of outlet relative velocity with impeller circumferential speed,

Impeller is its linear subtraction function than merit and outlet absolute velocity.

The self adaptation prerotator---the coaxial prerotator that becomes angle of attack elasticity runner is housed, is used for incoming flow and prewhirls and the arrangement of Speed cascade field.

A kind of leaf groove bifurcation structure of average rate turnout---high potential ratio impeller is mainly held back by the uneven distribution resistance of turnout discharge area

Make relative vortex, make leaf groove VELOCITY DISTRIBUTION homogenising and low velocity layer (LVL) fluidisation.

Inner antifriction---a kind of method and design that improves mechanical efficiency in the centrifugal pump, dynamically full gas phase is situated between between impeller end face and chamber wall

Matter, its coefficient of viscosity and specific frictional resistance reduce two orders of magnitude than liquid phase medium, are called for short antifriction.

Conservative circular rector design---a kind of centrifugal pump flow Field Design of conservative liquid amount of flow square inertia requires to keep in the impeller connecting passage

The continuity of velocity circulation, comprising is just prewhirling synchronously enters to lead with axial plane commutation zone circular rector.

Centripetal guide wheel---it is interior to the Scrawl air deflector that a kind of conservative circular rector designs, the complete constraint of its supercharging runner, and by optimizing expansion

The cumulative sectional area of rate and center line radius of curvature decrescence have the advantages that volume is little, efficient is high.

Centripetal supercharging---the Pressure Distribution of centripetal guide wheel, its flowpath pressure with the center line polar radius reduce and monotone increasing.

Fluid course between transfer leg runner---impeller outlet and centripetal guide wheel supercharging runner is by surrounding along curved surface outside the impeller cavity wall.

Super antifriction---a kind of method and design that improves the centripetal boosting centrifugal pump water conservancy diversion of inner antifriction efficient extended the impeller protecgulum and comprised

The impeller cavity part of transfer leg runner, with antifriction function district, front end chamber also thereby extend to this part.

Symmetrical end cap---general, the single multistage general centrifugal pump end cap in a kind of front and back has covered bearing block and has divided the snail road, center that confluxes to reach

Its kiss is taken over the road, and rotating front and rear cover during assembling can change respectively into going out tube angulation.

Centripetal supercharging module---a kind of mainly by impeller and centripetal guide wheel shaft to the centrifugal pump of the combination compress cell of energizing, have standardization

Interface parameters and fitted position, single multistage general, its interchangeability covering design, production and use procedure.

Modular combination---the centripetal supercharging module of a kind of usefulness and symmetrical end cap module striden the method for model combination single-stage and centrifugal multistage pump multiple centrifugal pump,

Each intermodule adopts the connection mode of " liquid stream flows into and outflow from paraxial annular mouth band circular rector ".

Quadratic form snail road---connect the centrifugal pump snail road that forms, its section by fixed length axial length semiellipse and the tuning up arc two kinds of sections kiss of growing up

Area is the Quadratic Function Optimization of central angle, can optimize rubbing surface and flow field gradient, and loss is less.

Dovetail groove lead ring---cross section is the centrifugal pump lead ring of isosceles trapezoid, as the transition air deflector between impeller and snail road, can avoid office

Section's excitation, its entrance and exit width equals respectively impeller outlet and snail road throat width.

The present invention relates to improvement and technical combinations method and the example of centrifugal pump structure, principle. Improve design forming high potential ratio, inner antifriction, centripetal boosting type centrifugal pump product, embody high-performance in throttling, efficient, power, all characteristics of cavitation erosion, or have advantage at aspects such as volume, cost and degree easy to use simultaneously. New method is used for carrying out modular combination between each new technology or between new technology and prior art, can form a greater variety of centrifugal pump new products.

Centrifugal pump is comprised of impeller, air deflector, casing and shaft components. Wherein, impeller is that air deflector is for being converted to liquid flowing energy the parts of pressure potential with the parts of hydrodynamic stream rotation to its acting. Centrifugal pump is a kind of fluid machinery of use amount maximum, extensively is equipped on the national economy every profession and trade. In the mine, the industry fields such as electric power, oil, chemical industry, machinery, light textile, environment, town and country construction and water conservancy, traditional farming, woods, herd, each industry of fishing, centrifugal pump all is a kind of common equipment, its installed capacity is very huge. For example, only the installation amount of Chinese agricultural pump on drainage irrigation namely surpasses 100,000,000 kilowatts, and wherein majority is centrifugal pump.

Centrifugal pump the 17th century end invents in France, so far the history in existing more than 300 year. Its fundamental equation the mid-eighteenth century just derives, remains so far the common base of new theory evolution. Water pump, is accompanied with industrial civilization and urbanization process as the history of first public driving arrangement by the mankind, some in addition liken it heart of national economy to, do not know but most people comprises the inventor. Here said water pump mainly also refers to centrifugal pump.

Since 19th century, particularly 20 end of the centurys, centrifugal pump research is comparatively popular, and its design and production technology live through repeatedly important improvement, and its performance improves constantly. Yet, prior art products or not fully up to expectations, its efficient is still on the low side, and its design and manufacture cost is still higher, and its installation and adjusting pattern also often can not satisfy user's needs.

The main cause that efficiency of centrifugal pump is on the low side is the following aspects:

The first, impeller output flow stream velocity is too high, and the kinetic energy ratio is too large. The hydraulic loss of kinetic energy in air deflector and speed square in addition cube be directly proportional, when speed is too high, the major part of kinetic energy will be depleted.

The too high efficiency of centrifugal pump that causes of flow velocity reduces, and this is that academia is known. All academic treatises are all led and are recommended backward inclined type of impeller, exactly in order to underspeed. Current centrifugal pump product, the overwhelming majority has adopted this impeller, but problem does not still solve. As seen from the following analysis, backward bent vane does not make flow stream velocity what reduce.

According to discharge velocity triangle, the absolute velocity v of impeller outlet liquid stream₂Outlet velocity of following u₂With relative velocity w₂Vector and, because w₂Than u₂A little order of magnitude, thereby to v₂Impact very little. In the hodograph of generally following, relative velocity w₂Graphics proportion often by exaggerative (having drawn little does not see), so that seem angle of outlet β₂Less backward bent vane can make absolute velocity v₂Reduce a lot. In fact, because the impeller outlet area is large, its outlet relative velocity w₂Than peripheral speed u₂Very little. Triangle in true ratio structure shows angle of outlet β₂Adjacent side u₂Very large, and another adjacent side w₂But very little, change β₂Can not significantly change its opposite side v₂Length. Therefore, conventional impellers is than the Eulerian equation Y of merit_T＝ u ₂v ₂cosα ₂-u ₁v ₁cosα ₁＝0.5(u ₂ ²-u ₁ ²+w ₁ ²-w ₂ ²)+0.5(v ₂ ²-v ₁ ²) in ratio potential energy item 0.5u₂ ²With than kinetic energy term 0.5v₂ ²Numerically be very approaching, because the numerical value of other specific energy items is all very little, thereby the moving ratio of impeller output gesture is in fact close to 1.

Enter to lead to have increased the weight of the water conservancy diversion load at a high speed, reduced the hydraulic efficiency of water conservancy diversion flow process, this is centrifugal pump hydraulic efficiency and gross efficiency first cause on the low side.

The second, in the impeller flow process, flow field velocity distributes very inhomogeneous, and very unstable, and the phenomenons such as turbulent flow, backflow, the separation of flow are difficult to eliminate always, have had a strong impact on the hydraulic efficiency of this flow process. In the joint portion of impeller flow process and water conservancy diversion flow process, liquid stream is in serious underconstrained state, so that relative vortex abduction, and turbulent flow, backflow, separation of flow driving force are presented mutually, and the influence area enlarges, and local exciting phenomena is serious, and all of these factors taken together all causes loss to increase.

The 3rd, the hub disk frictional dissipation occupies the ratio that can not be ignored, and has reduced interior mechanical efficiency. This loss and flow stream velocity are irrelevant, and be but sharp relevant with impeller diameter and the high power of rotating speed thereof. Along with impeller diameter or rotating speed increase, loss sharply increases. For low specific speed and high-lift centrifugal pump, disk friction may cause the decrease in efficiency more than 10%.

Above-mentioned three large reasons add the existence of other kinds loss, have determined that centrifugal pump can not have gratifying efficiency index. The data that the inventor exceedes ten thousand kinds of model specifications (wherein the product sample of some Chinese Enterprise is with regard to the amazing and ground more than five thousand that provides food for thought) at hand shows, the declared efficiency major part of prior art products is about in the of 50%, soprano's nominal 82%, the lowest only has more than 30%, and its mean value is between 50%～60%.

Declared efficiency is the index that just can reach when running on optimum operating condition. In fact, because the difference of the discrete distribution of the type spectrum specification of pump and the continuous distributed of actual demand, because the possible change of the application conditions of pump, the major parameter such as pressure and flow is in operation often needs to use external means to regulate, this has caused the statistical distribution reduction of centrifugal pump actual operating efficiency so that the situation of centrifugal pump off-design operating mode operation is very general. It has its source in:

The 4th, do not looked after this actual needs that extensively exists of variable parameter operation in the structural design of impeller and air deflector, generally adopted a kind of loss characteristic optimize in design discharge, to the runner design of liquid flow path direction sensitivity, such as inlet angle and the angle of outlet, the stator of air deflector and the angle of return guide vane etc. of impeller blade. When actual variable parameter operation, flow changes the change that causes velocity attitude, and direction changes to produce clashes into loss, causes actual efficiency to be lower than optimum operating condition efficient.

The employing of outside resistive adjusting to departing from of design conditions, not only causes the increase of the internal loss of pump, also exists simultaneously to betide outside energy loss. In fact the user has born and has betided respectively inside and outside double energy loss, and external losses can not be expressed in efficiency of pump index, does not also have independent metering to show and statistics. In order to calculate this loss, should investigate the capacity usage ratio of unit efficiency and whole liquid fluid system, they are obviously lower than the efficiency of pump.

Water pump is the energy consumption equipment that modern society comes out at the top, and its fallback has caused huge Socie-economic loss. Only in China, the year power consumption of water pump surpasses 4,000 hundred million degree, the part that wherein belonging to tap the latent power saves by conservative estimation also more than 50,000,000,000 degree. This has strengthened the operating cost of national economy, has also increased the weight of the ambient pollution burden in the production of energy. The efficiency of centrifugal pump is a great techno-economic question that must solve, and its urgency is ubiquity worldwide.

Except the urgent demand of raising the efficiency, reduce all kinds of problems that size, simplified structure and technique, reduction manufacturing cost, increase function value etc. concern cost performance, also all be that pump industry personage and the user of all circles institute generally is concerned about.

Task of the present invention is to overcome the above-mentioned shortcoming of centrifugal pump, and further creates new value.

First specific purposes of the present invention are: optimize the specific energy attribute structure of impeller output, design the new impeller of realizing this optimization and improve its flow field characteristic, the hydraulic efficiency of water conservancy diversion journey and impeller journey is increased substantially simultaneously.

Second specific purposes of the present invention are: change the friction media in the centrifugal pump impeller wheel disc outside, reduce its coefficient of viscosity, thus the interior mechanical efficiency of decrease disk friction loss and raising pump.

The 3rd specific purposes of the present invention are: the structure of improving air deflector and other parts, make it to be complementary with global design, with the loss of further reduction water conservancy diversion and the omnidistance hydraulic efficiency of raising, and fundamentally reduce the ratio size of air deflector and casing, make manufacturing cost lower and use more convenient.

The 4th specific purposes of the present invention are: design a kind of method, between all kinds of novel features, between novel features and conventional art parts, carry out the most effective technical combinations, with the good effect of generation efficiency, cost or use function aspects. Because the present invention is take the innovation of the improvement of correlation technique theory and Technologies And Conceptions as prerequisite, thereby necessity of this respect demonstration is also attached among each goal of the invention.

The present invention realizes that the technology path of first purpose is: design a kind of novel centrifugal pump impeller, the output of this impeller has higher gesture lift and lower moving lift, with both ratio---gesture is moving to be compared to parameter of measurement, and this ratio is increased significantly compared to prior art. The raising gesture is moving to transform impeller as shaft work mainly is converted into the parts of pressure potential purpose design than having embodied, do not have the relative velocity factor because in impeller channel, rely in the line integral supercharging equation of centrifugal force and path dot product, be chosen in the impeller of relative low speed and produce as much as possible the ratio that potential energy can reduce the fluidised form loss. The further reduction of moving lift means that the absolute velocity of impeller output must have further reduction on the basis of prior art backward bent vane reduction of speed scheme limiting value, its benefit is that the hydraulic loss of follow-up air deflector reduces rapidly along with the reduction of flow velocity, and the reduction of the minimizing of kinetic energy ratio and kinetic energy loss rate will cause the linear raising of the efficiency of pump.

Gesture moving than with the prior art concept in degree of reaction or the respective function relation of reaction coefficient with monotone increasing, therefore, it is moving than being exactly to improve degree of reaction or reaction coefficient to improve gesture. The present invention's definition and use gesture are moving than concept, are because it is more readily understood, and can clearer and more definite, more specifically express characteristics of the present invention and be worth the place.

As previously mentioned, there is the reduction of speed limit in backward bent vane. For breaking through this limit, must transform the prior art impeller. These transformations will comprise large outlet is changed into little outlet, liquid is flowed out bicker further is reduced to and equals 0 or no better than the new design such as 0, to produce the outlet relative velocity that direction is favourable, size meets the demands. The purpose meaning of these transformations is, two potential energy production ways with different proportion of goods damageds are done appropriate weight arrangement, so that the efficient of centrifugal pump obtains the expression of optimum nonlinear combination.

The present invention realizes that the technical scheme of first goal of the invention is: adopt the moving impeller that compares of high gesture, the leaf concentrated flow road afterbody of this impeller towards the traditional method of indicating the pronunciation of a Chinese character to bending and sectional area reduce gradually, fluid is accelerated and changes direction in the path ends of centrifugal force acting, at last flow out impeller with larger relative velocity with close to 0 the angle of outlet, absolute velocity is corresponding reduces in outlet, turns to the moment of reaction that produces with accelerator to make rotating shaft subtract merit.

The present invention program designs on the basis of the law of conservation of mechanical energy. Leaf concentrated flow journey end in rotating coordinate system carries out power conversion and changes the moving ratio of output gesture, is a kind of the potential energy production environment is selected favourable and avoided disadvantageous application of policies, and the dynamics means that apply are resistance power, and transfer process is low-loss.

Principle of the present invention is deduced in describing the Eulerian equation of impeller than merit, is that this equation is organized a result who optimizes. Investigate equation Y_T＝u ₂v ₂cosα ₂-u ₁v ₁cosα ₁＝0.5(u ₂ ²-u ₁ ²)+0.5(w ₁ ²-w ₂ ²)+0.5(v ₂ ²-v ₁ ²), this equation has been described the quantitative relation of impeller to being energized by the transport motion in the rest frame and the synthetic liquid flow movement of the relative motion in the rotating coordinate system. Wherein, 0.5 (u₂ ²-u ₁ ²) be that the centrifugal force merit is converted into the line integral value than potential energy, finish in the absolute movement path of the centrifugal force field in rest frame. 0.5 (w₁ ²-w ₂ ²)+0.5(v ₂ ²-v ₁ ²) comprising whole continuous items of the synthetic ratio kinetic energy of two motions in the coordinate system, implicit kinetic energy exchanges mechanism with potential energy, and in accordance with the law of conservation of mechanical energy (disregarding frictional dissipation). Liquid stream is 0.5 (v than kinetic energy increment in impeller channel₂ ²-v ₁ ²), directly from blade normal force merit (equaling than the remainder behind the additional centrifugal force merit anergy of merit deduction), it then is 0.5 (u than potential energy increment₂ ²-u ₁ ²+w ₁ ² -w ₂ ²), respectively from centrifugal force merit and relative motion than kinetic energy decrement.

For the purpose that increases production capacity, prior art always with relative motion than kinetic energy decrement item 0.5 (w₁ ²-w ₂ ²) set on the occasion of increase because do like this when can cause than merit and gesture lift. But traditional concept is for having expressed too many hope by the synthetic discharge velocity triangle of motion. In fact, cosine law formula v₂ ²＝u ₂ ²+w ₂ ²-2u ₂w ₂cosβ ₂Can not provide desirable result, this is because w₂Compare u₂A little order of magnitude is so that w₂ ²-2u ₂w ₂cosβ ₂With respect to u₂ ²No better than 0, so v is arranged₂ ²≈u ₂ ² Let alone very high absolute velocity v₂Enter the water conservancy diversion flow process, can produce huge loss, so that form the first bottleneck of the restriction efficiency of pump. The only way that addresses this problem is relative motion than kinetic energy decrement item 0.5 (w₁ ²-w ₂ ²) change negative value into, namely increase w by backward energy conversion₂, at this moment, above-mentioned cosine law formula will provide lower absolute velocity v₂, the efficiency bottle neck of centrifugal pump just can be broken through.

Based on above analysis, main design feature of the present invention---the angle of outlet, suitable large outlet relative velocity close to 0 just have reason to have set up.

As angle of outlet β₂During ≈ 0, outlet relative velocity w₂With velocity of following u₂Oppositely, can offset to greatest extent u₂ Set β₂≈ 0 also has another important function, that is: outlet is separated in the situation of cloth mutually, needs the velocity field arrangement after the very little angle of outlet is come the tissue fluid flow export, causes turbulent flow to avoid disadvantageous VELOCITY DISTRIBUTION. β₂≈ 0 means that discharge velocity triangle is reduced into straightway, and absolute velocity will be by algebraic operation v₂＝u ₂-w ₂＝(1-K)u ₂Provide. In the formula, COEFFICIENT K=w₂/u ₂Be called the feedback speed reducing ratio. K is important regulation and control parameter, and its size has reflected the degree that absolute velocity reduces linearly. Why being called the feedback speed reducing ratio, is because generate the traditional method of indicating the pronunciation of a Chinese character to relative velocity w in rotating coordinate system₂The time, its moment of reaction makes rotating shaft subtract merit, and this is a loss-free kinetic energy feedback process. Kinetic energy feedback slows down and show as acceleration in rotating coordinate system, so in the blade wheel structure acceleration channels must be arranged.

In order to make absolute velocity v₂Significantly reduce W₂Numerically must arrange also more manyly greatly than the limiting value of prior art, should reach and u₂Level with the order of magnitude. Reduce discharge area and at leaf concentrated flow road end the accelerating sections that reduces gradually sectional area is set and to realize this goal. When the K=0.5 left and right sides, w₂＝Ku ₂≈0.5ωR ₂ Relative velocity w₂Increase inevitable to consume potential energy as cost, therefore, the output of impeller will be because of w than potential energy increment₂Increase and reduce. Because the decrease than potential energy increment is 0.5 ω²R ₂ ²K ², with square being directly proportional of true decimal K, thereby numerical value is less. Decrease than kinetic energy increment then equals 0.5u₂ ²-0.5(u ₂-Ku ₂) ²＝0.5ω ²R ²(2K-K ²), this decrease that compares potential energy is much bigger, and both ratio is (2-K)/K, thereby the output gesture of impeller is moving than increasing considerably. Calculating shows that practical interval K value can make the output gesture moving than increasing by 2～8 times.

The present invention program has significant effect for improving the efficiency of pump. High potential ratio impeller output liquid stream absolute velocity is less, and the water conservancy diversion load is light, and the loss of speed power class will significantly reduce, thereby have the water conservancy diversion efficient more much higher than prior art.

The hydraulic loss major part of centrifugal pump occurs in air deflector. The prior art centrifugal pump to enter water conservancy diversion speed very high, usually surpass 20 meter per seconds, than the high order of magnitude of waterpower standard, this certainly leads to large loss. In air deflector, friction is difficult to avoid at a high speed limit friction, the large gradient; High-speed impact, the separation of flow, local excitation also often occur, and these losses have 2 powers or 3 sharp relevant sensitiveness of factor to entering to lead speed. The water conservancy diversion loss is especially serious in the situations such as middle-size and small-size, low specific speed and the operation of off-design operating mode, and kinetic energy loss rate at this moment may surpass 50%. The present invention has king-sized effect to saving these losses, and the below distinguishes local resistance type and the concrete effect that this effect is discussed of resistance-type two class water conservancy diversion losses on the way.

For the loss of local resistance type water conservancy diversion, rapid resistive fluidised forms such as bump, local excitation, flow velocity drastic change, its loss concentrates on local the generation. Square being directly proportional of this class loss and flow velocity is directly proportional with coefficient of partial resistance. Contrast to simplify the analysis and directly, definition high potential ratio liquid stream is local resistance type water conservancy diversion loss ratio with normal gesture than the ratio that liquid flows this class water conservancy diversion loss of (the gesture ratio is 1), and this ratio is listed in table 1 the 3rd row with the former regulation and control parameter K change conditions.

For resistance-type water conservancy diversion loss on the way, for example typical supercharging runner loss of air deflector, its analytical calculation depends on path integral, and the parameter that participates in computing is a lot. Determine that now the contrast prerequisite is: high potential ratio and normal gesture ratio enter drain to flow specific energy identical, and flow is identical, and the sectional area spreading rate is identical, and coefficient of friction is identical, and the ratio that enters to lead speed is known, and geometry is similar, etc. To simplify the analysis, suppose that also diversion outlet speed is identical, and can ignore result's impact. According to these prerequisites, can release with the hydrodynamics correlation theory: than square being directly proportional of (ratio of the specific energy loss on the unit length) and velocity ratio, its data are listed in table 1 the 4th row than the specific loss of the contrast section on the way of water conservancy diversion for high potential ratio and normal gesture; The water conservancy diversion operation length that is determined by both water conservancy diversion duty ratios is directly proportional than with entering to lead velocity ratio, and its data are listed in table 1 the 5th row. Use and process the water conservancy diversion of the resistance-type on the way loss ratio that the similar method of local loss defines both, ignore high-order that muzzle velocity causes in a small amount, integration can this loss ratio be directly proportional with 3 powers that both enter to lead velocity ratio, and its data are listed in table 1 the 6th row.

Table 1 high potential ratio liquid stream is estimated the K relation table with normal gesture than water conservancy diversion loss and the former speed of liquid stream

High potential ratio is estimated (feedback speed reducing ratio K)		0	0.1	0.2	0.3	0.4	0.5	0.6	0.7
										The high potential ratio liquid force and velocity of a current is moving than λ representative value		1.00	1.25	1.60	2.12	3.02	5.07	17.2	-
The local resistance type	The water conservancy diversion loss ratio	1.00	0.81	0.64	0.49	0.36	0.25	0.16	0.09
										Resistance-type on the way	The specific loss ratio	1.00	0.81	0.64	0.49	0.36	0.25	0.16	0.09
Water conservancy diversion operation length ratio	1.00	0.90	0.80	0.70	0.60	0.50	0.40	0.30
									The water conservancy diversion loss ratio		1.00	0.729	0.512	0.343	0.216	0.125	0.064	0.027

With reference to table 1, wherein the 1st row is independent variable, is the control parameter of high potential ratio impeller---feedback speed reducing ratio K is that each loss parameter is estimated than the speed of formula molecule. The 2nd row is the representative value of the moving ratio of the high potential ratio liquid force and velocity of a current, is the specific energy Attribute Measure than formula molecule. All the other are because becoming the ratio that 3,4,5,6 row data are comparison parameters, represent respectively the local resistance type water conservancy diversion loss ratio of two kinds of liquid stream, on the way resistance-type water conservancy diversion specific loss ratio, water conservancy diversion operation length ratio, resistance-type water conservancy diversion loss ratio on the way.

The 1st column data is 1 entirely, because both normal gesture flows than liquid, parameter is identical. All the other each row are true decimal entirely, and expression high potential ratio liquid stream has lower water conservancy diversion loss objective, and these ratios are all estimated the increase of K along with the high potential ratio flow stream velocity and reduced. The 3rd row and the 6th row have directly provided the loss of local resistance type water conservancy diversion and the ratio of resistance-type water conservancy diversion loss on the way, and this two ratio all reduces relatively with K is sharp.

The 6th line number according to the show, in the span of K, the more normal gesture of water conservancy diversion loss of high potential ratio liquid stream flows down than liquid falls an order of magnitude. Its practical significance is: for the water conservancy diversion of resistance-type on the way that occupies the holotype status, the normal gesture of loss ratio of high potential ratio liquid stream flows a little order of magnitude than liquid. In fact, because normal gesture mixes in wherein than also often comprising some local resistance type losses in the diversion technology, particularly variable-flow moves the general and regularly existence of 2 type losses of varied angle bump class that causes, so that larger than the actual denominator of formula, in the high potential ratio water conservancy diversion characteristic without this type of factor, and have the low-loss diversion technology of complete constraint supporting, thus actual ratio also will less than in addition data in the table 1, this and wait until follow-up explanatory note. Conclusion is: the high potential ratio liquid stream of high potential ratio impeller output has into the characteristic that order of magnitude ground reduces the water conservancy diversion loss.

Can illustrate good effect of the present invention. For example, the gesture of establishing certain prior art centrifugal pump is moving than being 1, and the kinetic energy loss rate of its local resistance type water conservancy diversion is 50%, and being converted into the specific energy proportion of goods damageds then is 25%, is in every other loss under 0 the perfect condition, and the efficient of this pump will only have 75%. Use high potential ratio impeller of the present invention instead, if its flow is identical with reduced parameters such as specific energys, but gesture is moving than improving 3 times, namely be increased to 4 by 1, then the normalization water conservancy diversion duty ratio of air deflector is 1/ (1+4)=20 %, be reduced to 40% of the contrast corresponding duty ratio 1/ of pump (1+1)=50%, it enters to lead (0.2/0.5) that speed is reduced to contrast pump corresponding speed^0.5=63.25%, its kinetic energy loss amount and the specific energy proportion of goods damageds that are directly proportional with it all are reduced to 40% of contrast pump by the velocity squared rule, but both kinetic energy and equate than the proportion of goods damageds of kinetic energy. Under same assumed condition, its specific energy proportion of goods damageds are reduced to 25% * 40%=10%, and its efficient will bring up to 90%.

What above-mentioned analyzing examples adopted is the insertion loss analytical method. Be without loss of generality, remove the hypothesis of " every other loss is 0 ", introduce water conservancy diversion and insert the rule that the efficient concept just can be analyzed separately the water conservancy diversion loss easily. It is the water conservancy diversion hydraulic efficiency that water conservancy diversion inserts efficient, is defined as the ratio of output specific energy with the input specific energy of water conservancy diversion journey, and in efficiency equation, it is the nonlinear factor of omnidistance hydraulic efficiency and gross efficiency, ignores high-order and can be considered in a small amount linear factor. In this analytical method, gesture is moving comparatively more convenient than being elected to be variable parameter, because than square being directly proportional of the loss amount of kinetic energy and flow velocity, also namely with than kinetic energy be directly proportional. Notice kinetic energy in the example and than the proportion of goods damageds of kinetic energy with the moving rule than changing of gesture, introduce according to this proportionality constant, loss kinetic energy to the specific energy normalized, is got the effectiveness formula of high potential ratio liquid stream local resistance type water conservancy diversion such as (1) formula.

η _hin1＝1-ξ ₁/(1+λ)…………………………………………………………(1)

ξ in the formula₁For local resistance type water conservancy diversion under the design discharge than kinetic energy loss coefficient. ξ₁/ (1+ λ) is the specific energy proportion of goods damageds, and is directly proportional than kinetic energy, thereby is inversely proportional to (1+ λ). As previously mentioned, the gesture of prior art centrifugal pump is moving than being essentially 1, thereby its efficient is η_hin1＝1-ξ ₁/ 2. Use instead after the high potential ratio impeller, its efficient improves by (1) formula rule, its synergism performance such as table 2.

Table 2 high potential ratio and normal gesture are than liquid stream local resistance type water conservancy diversion efficient comparison sheet

Than kinetic energy loss coefficient ξ1		0.2	0.3	0.4	0.5	0.6	0.7
								Water conservancy diversion efficient	λ=1 (prior art)	0.9000	0.8500	0.8000	0.7500	0.7000	0.6500
λ＝2	0.9333	0.9000	0.8667	0.8333	0.8000	0.7667
							λ＝3		0.9500	0.9250	0.9000	0.8750	0.8500	0.8250
λ＝4	0.9600	0.9400	0.9200	0.9000	0.8800	0.8600
							λ＝5		0.9667	0.9500	0.9333	0.9167	0.9000	0.8833
λ＝6	0.9714	0.9571	0.9429	0.9286	0.9143	0.9000
							λ＝7		0.9750	0.9625	0.9500	0.9375	0.9250	0.9125
λ＝8	0.9778	0.9667	0.9556	0.9444	0.9333	0.9222
							λ＝9		0.9800	0.9700	0.9600	0.9500	0.9400	0.9300

As can be seen from Table 2, even poor air deflector, for example than kinetic energy loss coefficient ξ₁=0.5 air deflector, moving during than λ=3～9 when gesture, its local resistance type water conservancy diversion efficient will bring up to 87.5%～95.0% by 75% of prior art. As seen, improving gesture moves than increasing substantially local resistance type water conservancy diversion efficient.

More approaching reality be resistance-type water conservancy diversion loss on the way. Still adopt data and condition in the upper example that contrast is analyzed in this class loss, high potential ratio is 40% with the water conservancy diversion duty ratio of normal gesture ratio, enters to lead velocity ratio and be 63.25% two and calculate that ratio is constant in the example, set up air deflector geometric similarity, sectional area spreading rate and coefficient of friction homogeneous phase equal conditions, then the water conservancy diversion operation length of high potential ratio liquid stream will be reduced to 63.25% of contrast pump, its on the way the kinetic energy loss amount on the unit length all be reduced to 40% of contrast pump by the velocity squared rule, its on the way the kinetic energy loss amount will be reduced to 0.6325 of contrast pump³=25.3%, obviously, both is no longer more equal than kinetic energy loss rate, this index with enter to lead speed and be directly proportional. Then under same assumed condition, its specific energy proportion of goods damageds will be reduced to 25% * 25.3%=6.3%, and its efficient will bring up to 93.7%.

For resistance-type water conservancy diversion loss on the way, notice than kinetic energy loss rate and the characteristics that enter to lead speed and be directly proportional, thereby the maximum of only having this speed namely without potential energy liquid stream just may be as constant shared constant than kinetic energy loss rate, introduce this constant, and loss made normalized to specific energy, get high potential ratio and normal gesture than the water conservancy diversion effectiveness formula of liquid stream such as (2) formula.

η _hin2＝1-ξ ₂/(1+λ) ^1.5  …………………………………………………(2)

ξ in the formula₂For have same traffic and identical specific energy without potential energy liquid stream (λ=0) at structural similarity, the kinetic energy loss rate of spreading rate is identical, coefficient of friction is identical, muzzle velocity imposes a condition the mutually on an equal basis lower water conservancy diversion of resistance-type on the way, be the estimating of quality level of the structure ﹠processes of this type of air deflector. When λ changed, the specific loss coefficient of coupling air deflector is not identical with operation length, and was more not identical than kinetic energy loss rate yet, but its specific energy proportion of goods damageds all are subjected to same constant ξ₂Objective restrict and have comparativity. In the formula, ξ₂/(1+λ) ^1.5Be the specific energy proportion of goods damageds of air deflector, be directly proportional with 3 powers of flow velocity, thus with (1+ λ)^1.5Be inversely proportional to. The gesture of prior art centrifugal pump is moving than being 1, and its water conservancy diversion efficient is η_hin2＝1-ξ ₂/2 ^1.5＝1-0.3536ξ ₂ Use instead after the high potential ratio impeller, water conservancy diversion efficient improves by (2) formula rule, its synergism performance such as table 3.

Table 3 high potential ratio and normal gesture flow resistance-type water conservancy diversion efficient comparison sheet on the way than liquid

Share according to loss factor ξ2		0.2828	0.4243	0.5657	0.7071	0.8485	0.9899
								Water conservancy diversion efficient	λ=1 (prior art)	0.9000	0.8500	0.8000	0.7500	0.7000	0.6500
λ＝2	0.9456	0.9183	0.8911	0.8639	0.8367	0.8095
							λ＝3		0.9647	0.9470	0.9293	0.9116	0.8939	0.8763
λ＝4	0.9747	0.9620	0.9494	0.9367	0.9241	0.9115
							λ＝5		0.9808	0.9711	0.9615	0.9519	0.9423	0.9326
λ＝6	0.9847	0.9771	0.9695	0.9618	0.9542	0.9466
							λ＝7		0.9875	0.9812	0.9750	0.9688	0.9625	0.9563
λ＝8	0.9895	0.9843	0.9790	0.9738	0.9686	0.9633
							λ＝9		0.9911	0.9866	0.9821	0.9776	0.9732	0.9687

With reference to table 3, wherein the amplification of each line efficiency data of high potential ratio is apparently higher than table 2. Even poor or very poor supporting air deflector is for example according to loss factor ξ₂=0.7071～0.9899 air deflector, its normal gesture only has 75 %～65% than the water conservancy diversion efficient of water conservancy diversion, and moving during than λ 〉=4 when gesture, high potential ratio water conservancy diversion efficient is all more than 91%. Work as ξ₂=0.7071 o'clock, normal gesture was 75% than water conservancy diversion efficient, and high potential ratio water conservancy diversion efficient is but up to 93.7%～97.8%. As seen, for resistance-type air deflector on the way, it is moving than can improving more significantly water conservancy diversion efficient to improve gesture, and has the advantage of an order of magnitude. The advantage of a so-called order of magnitude refers to by 1-a * 10^_nBring up to 1-a * 10^_n_1Wherein a is mixed decimal, and n is positive integer.

Resistance-type water conservancy diversion loss on the way is the canonical loss pattern of centrifugal pump air deflector, but local resistance type loss also existing leaning under the art framework is difficult to avoid, especially the throttling in the actual liquid fluid system is regulated, can cause variable parameter operation and local loss to produce therefore, the present invention divides and chats the discussion of the water conservancy diversion efficient superfluous words of having to, because their mechanical model has difference, the result also differs widely. Expect realistic comparing data, should try to achieve weight coefficient based on statistics for entire group according to the statistics of two kinds of loss patterns in the prior art air deflector, in order to the weighting processing is done in two kinds of water conservancy diversion losses and efficiency data, its result will just conform with the reality of prior art.

Target of the present invention and result are embodied in table 3. Resistance-type is the target pattern of the water conservancy diversion loss of generally acknowledging on the way, and the disclosed air deflector of follow-up explanation can ensure the realization of this pattern, and variable parameter operation does not change pattern.

The high potential ratio impeller can also have very high impeller journey hydraulic efficiency, thereby its omnidistance hydraulic efficiency will reach very high index. Increasing substantially of hydraulic efficiency means that the first bottleneck that restricts efficiency of centrifugal pump is broken.

Except improving water conservancy diversion efficient, the present invention program can also make the manufacturing cost of centrifugal pump reduce significantly. It is the reasons are as follows: adopt the high potential ratio impeller to reduce after the flow stream velocity, along with alleviating of kinetic energy conversion load and reducing of operating rate, the flow process of air deflector can significantly shorten, and structure can correspondingly be simplified, its volume can dwindle greatly, and the manufacturing cost that reduces pump may just become. In the prior art, air deflector works in this super waterpower normality condition of liquid stream flow at high speed, and arrival line speed does not wait to tens meters of per seconds from tens meters of per seconds, surpasses order of magnitude of waterpower standard. Although its kinetic energy conversion efficiency can not be done highly, people still have reason therefrom to excavate as much as possible the efficiency potential of each percentage point. But under the prior art framework, the space cost that raising water conservancy diversion efficient is paid is too large, and potentiality are limited. We see, are laid in the air deflectors such as lead ring, guide wheel, snail road of impeller outer annular space, because its volume becomes functional relation 2 times with diameter dimension, and their volume thereby also larger than impeller, the air deflector volume ratio of loaw specific speed pump is larger. Most of volume that they have occupied centrifugal pump has consumed a lot of metal materials and machining period, causes the manufacturing cost of pump to increase a lot. The present invention program makes the kinetic energy conversion load of air deflector be reduced to some/one, operating rate reduces about half, thereby the size of air deflector and volume can significantly reduce, precision and surface quality require also can suitably relax, air deflector occupies the situation of most of volume and will greatly take on a new look, and the manufacturing cost of centrifugal pump also is expected therefore to reduce many.

The present invention program has also produced a shortcoming, that is exactly, the theory of impeller will reduce along with the increase of feedback speed reducing ratio K than merit and theoretical head, this is owing to due to the output of impeller reduces than kinetic energy simultaneously than potential energy and output, this means that the exerting oneself of impeller of same diameter and same rotating speed will be reduced to some extent. After the selected parameter K, reach same theoretical head, must strengthen impeller diameter or increase rotating speed and compensate this theory than the loss of merit and theoretical head, obviously, this will increase again impeller linear velocity and liquid stream absolute velocity, and high power ground is increased the disk friction loss.

This shortcoming makes us worrying at first sight, shows but analyse in depth, and the loss that shortcoming causes only has one of the disk friction of increase, and aftermentioned measure of the present invention can address this problem. In fact other seem disadvantageous characteristic can get rid of, even can draw challenging new conclusion by this shortcoming on the contrary. Its reason is: first, theory becomes quadratic relationship with theoretical head with the velocity of following than merit, and absolute velocity and K are linear relationships, thereby needing in theory the increment of the diameter increment that compensates or diameter and rotating speed (rotating speed inconvenience increases continuously) product less, required velocity of following increment is much smaller than the reduction of the absolute velocity that causes because of K. The second because the increasing substantially of efficient, to theory than the demand decrease of merit and theoretical head, so that in fact do not need compensation. Also can see from the pressure coefficient analysis that hereinafter will discuss, the present invention program is in the K value scope of recommending, the design pressure coefficient that the actual pressure coefficient that its theoretical pressure coefficient and change are little and prior art are commonly used is substantially suitable, be substantially equal to 1, thereby substantially do not need the compensation or compensation rate very little, this is the later actual effect of considering efficiency factor. This conclusion can be understood like this: theory of the present invention is actually than the reduction of merit and theoretical head and has reduced the upper part of reserving of prior art design because of the low off-energy that must consider of efficient, mainly be the water conservancy diversion hydraulic loss, also comprise the hydraulic loss of part impeller flow process. The 3rd, but theoretical than merit and theoretical head minimizing and be parameter control minimizing just the present invention change the basic point of centrifugal pump parameter rigidity, just from this basic point, just produced the broad space of controllability and the design of self controllable property.

Conclusion is that the adverse effect of the present invention program's shortcoming can overcome, and can be converted into advantage.

The present invention's high potential ratio impeller scheme comprises following specific design, and they can make target capabilities more outstanding, and it is more stable to work, and its design procedure is also clearer and more definite concrete:

A, runner exit are rectangle or interior rounded corner rectangle or circle, and girth is as far as possible little, and adjacent accelerating sections has the respective cross-section of continuous transition before it. In adopting when rounded corner rectangle or circular cross-section, on the cover plate or corresponding benefit structure arranged. Angular distance between the adjacent outlet equals 360 degree divided by the runner number, and the outlet normal plane is vertical with runner. Last outlet inner side edge is to the smooth gradually open arc terminal face that is connected between the rear outlet outer side edges, and circular or interior rounded corner outlet connects with conduit kiss from deep to shallow. Cross section of fluid channel between cylinder or groove face and the circumference cylinder is long-pending to become the periodicity linear relationship with central angle. Separate mutually the outlet a fluid stream of cloth through the wall attachment effect arrangement of camber line cylinder or groove face, form aduncate uniform streamline at wheel along the outlet spacer region, the radial component of flow velocity and tangential component do not change with central angle, on the circumference cylinder, pressure, flow velocity and radially equal everywhere with tangential component.

B, each runner exit area sum equal the design volume flow and design the ratio of outlet relative velocity, and this speed equals impeller circumferential speed and the product that feeds back speed reducing ratio K.

Technology essential factor a in the concrete scheme discloses a kind of runner exit shape and the wheel of high potential ratio impeller and has put mechanism in order along structure and muzzle velocity field thereof. Than conventional impellers, this design and mechanism thereof have increased restrained degree and the stability that oral fluid stream, and its friction area is also less. Exit angle design makes outlet relative velocity and the velocity of following reverse, is intended to offset this speed. The outlet normal plane is vertical with runner to mean that streamline is smooth and liquid stream is stable, means that the angle of outlet is very little. Angle of outlet sine value determines the axial plane component of outlet relative velocity, and well equals this component divided by the outlet relative velocity. Because to take turns week all be equally distributed to the axis plane velocity component that the specific appearance of outlet spacer region joint face, its wall attachment effect make the outlet area flow field whole, thereby the axis plane velocity component just in time equals again flow divided by the area of impeller outlet external cylindrical surface. Its axis plane velocity is little, and angle of outlet sine is also little, and the angle of outlet normal plane and axial plane is also very little, almost just on axial plane. Export cosine of an angle then no better than 1, thereby the velocity of following is had to greatest extent negative function. The purpose of this design is except output high potential ratio liquid stream, and main consideration also is flow field, stabilization of export district. Stable objects comprises makes liquid stream neither produce local excitation to front region when outlet, wheel does not occur again along the separation of flow; Also comprise the utilization to wall attachment effect, make it to produce monolateral the wheel along constraint: comprise that also the radial component and the tangential component that make muzzle velocity have best direction continuity and distributing homogeneity.

Connecting with smooth gradually open arc terminal face or trough of belt cylinder between the adjacent outlet is a key character, its purpose be to make the outlet a fluid stream obtain outline line cylinder or groove face wall attachment effect even absorption and curve inwardly continuously, in order to avoid because of momentum inertia in the long outlet interval region generation separation of flow or local excitation. The generting machanism of wall attachment effect is: under the condition that neighborhood fully retrains and in certain momentum inertia amplitude, the difference of the exterior lateral area of a fluid stream and interior sidewall surface absolute pressure can provide normal force to make the liquid miscarriage give birth to the acceleration that turns to continuously with wall, wherein the absolute pressure of wall is with the outside pressure adaptive change, equal or during close to saturated pressure when the absolute pressure self adaptation in the wall small neighbourhood is reduced to, wall attachment effect is unstable and the separation of flow occurs. The present invention utilizes the condition of wall attachment effect to be: the outlet a fluid stream outside has the abundant large static pressure that ensures by than potential energy amplitude; Liquid flow export relative velocity is subjected to minimum gesture moving than restriction, and its momentum inertia is limited; The outline line cylinder is that mathematics is smooth, and continuity and radius of curvature with curvature are larger, the amplitude that required attached wall centripetal acceleration perseverance limits less than the specific potential the subject of knowledge and the object of knowledge, and therefore, wall attachment effect is stable, does not have the separation of flow and occurs.

Outlet outer cylinder or groove face and the cross section of fluid channel between the circumference cylinder be long-pending, and become the periodicity linear relationship with central angle be another key character, its effect is except the stability of strengthening wall attachment effect, and main purpose is to regenerate uniform radial velocity component at the outlet spacer region. Because the outside of the runner between outlet outer cylinder or groove face and the circumference cylinder is open, the effect that impeller can produce can only be the monolateral constraint of wall attachment effect. Rely on this constraint just can outlet and interval location mineralization pressure, flow velocity and radially with the equally distributed flow field of tangential component, this is an invention of the present invention. Monolateral constraint virtual reconstruct the effect of continuous opening, overcome in the prior art wheel that brings along constraint without wheel along series of problems such as backflow, the separation of flows. This mechanism makes the inside of impeller channel and outlet area satisfy simultaneously complete constraints, thereby has solved the part excitation problem when impeller channel is connected with the air deflector runner from the source. And the even distribution of the pressure on the circumference of impeller face and speed is a kind of state that has nothing to do with operating condition, thereby has produced the complete adaptability of variable parameter operation.

The large opening of prior art almost is continuous, because relative velocity is very little and not radially constraint of wheel, under the abduction tendency effect of the relative vortex in limited blade impeller runner, wheel is along producing many wild effects such as backflow, turbulent flow and suction surface afterbody low-pressure area near the outlet area. The harm of these phenomenons is stronger, impeller hydraulic efficiency thereby descend many. This is heat subject, and academia has carried out many researchs to it, comprises the analysis results that adopts the Three dimensional Turbulent theory and adopts data ultrasonic or that laser technology is measured, and document is immense, and rule is also found out substantially. Under the guidance of potential flow theories, people have taked many measures to the large backflow of pressure face that relative vortex causes, and for example less rear bent angle just can slow down and control backflow, but have paid the cost that increases subtended angle of blade and increase loss on the way. The blade suction surface trailing edge whirlpool phenomenon of large open end blade is to cause another major reason of impeller hydraulic loss, this phenomenon can form in the tail district strong turbulent flow and the separation of flow when undercurrent amount operating mode is moved, may cause congested than the outlet of wide-angle when serious. Suction surface trailing edge vortex pair forms suction in rotating shaft and hinders, its active force brachium, and the moment of resistance of generation is large, thereby loss power is large. The trailing edge whirlpool is the result of whole complicated field of force comprehensive functions, can not explain with potential flow theories. Study carefully the reason on its Technology design, the judgement that lacks constraint is correct certainly. Stability and the homogeneity question of large open end blade runner and exit flow field thereof, seriously restricting the raising of impeller flow process hydraulic efficiency, and fail for a long time to solve, in fact, under the structural framing of prior art, in numerous factors that condition each other, it is possible seeking optimum half-way house, and the solution of seeking essence then is difficulty or impossible.

The present invention program does not have large opening, and at outlet area monolateral the wheel along constraint is set, and this is the overstable mechanism in a kind of outlet area flow field. Under this design, relative vortex is abduction not, the possibility that the outlet wheel refluxes along district's nothing, wheel causes the wild effect of loss and cavitation erosion to comprise that the whirlpool loss of suction surface trailing edge will not exist along the turbulent flow of distinguishing and the separation of flow etc., the outlet area velocity-stabilization, streamline is even, thereby can look to higher impeller journey hydraulic efficiency.

Technology essential factor b provides the method that specifically calculates open area and set the feedback speed reducing ratio. The importance preamble of feedback speed reducing ratio parameter K is mentioned, also will repeatedly discuss in the follow-up explanation. After the physical dimension of impeller and rotating speed are determined, determine the parameters such as K and discharge area according to described method, in fact determined the design conditions of centrifugal pump comprehensively, its all kinds of characteristic curves also will be determined thereupon.

Described specific design has also been determined the design conditions parameter of impeller simultaneously. When operating condition changed, feedback speed reducing ratio K and flow proportionally changed, and then concerned with the linear subtraction function of flow than merit or lift. These relations also show, product of the present invention can be in a very wide scope variable parameter operation. Variable parameter operation is a kind of widely demand, and the present invention is different from the operation characteristic of prior art, obviously more meets the actual needs of variable parameter operation. For example, the distinctive flow-power characteristic of the present invention has embodied preferably variable working condition adaptability: the increase amplitude of shaft power is less when augmented flow moves, overload free danger; Its lift sharply increases when reducing the flow operation, and the amplitude that power descends is also less, and after lift increased to maximum, power reduced with the reduction of load, is gradually to fixing mechanical loss power. This is that a kind of low side becomes and the ideal characterisitics of high-end approximate constant power with load. Again for example, the distinctive flow-efficiency characteristic of the present invention more can embody its variable working condition adaptability. In the outside regulator solution streaming system of normally undercurrent amount operation, the characteristic that prior art centrifugal pump low side efficient is fallen suddenly will cause serious energy waste. And efficiency characteristic of the present invention to be low side raise, after adopting inner antifriction technology described later, this low side efficient is not fallen the zone of rising on the contrary on logarithmic coordinates even can be again to interval index of low side translation.

The blade shape design of the present invention's high potential ratio impeller is: impeller blade is L-shaped, its front middle part is respectively straightway, be radially tendency, its ancon and the appropriate radius of curvature transition of afterbody warp are towards the traditional method of indicating the pronunciation of a Chinese character to bending, afterbody has the mechanical strength of isolation inside and outside differential pressure and sharp-pointed end, appropriate radius of curvature transition comprises that the appearance of inside and outside both sides changes, the requirement of runner accelerating sections changes of section is satisfied as the distance between accelerating sections outside binding side and the blade ancon in the afterbody inboard, the angle of moving towards that the wall attachment effect arrangement is satisfied in the afterbody outside changes requirement, and ancon lateral curvature radius also satisfies not separation of flow condition.

Above-mentioned blade shape scheme has provided and has realized that wheel is along the concrete structure of constraint and the acceleration of leaf slot tail. Wheel is that along constraint near circumferential tendency by L shape blade afterbody realizes, it is inboard to consist of leaf slot tail accelerating sections outside constraint wall, its outside consist of outlet outer gradually open outline line cylinder or groove face, be used for a constraint arrangement mouthful Flow Field outside. It is very easily that the interior outer side edges border curve of blade is constructed with numerical algorithm, with this solution from circumferential interior reckoning, can pointwise realize the performance datas such as a mouthful outer contour location, vane thickness, leaf slot cross-section amass, every bit all will carry out the relevant Mechanics Calculation such as active force, intensity, fluid motion. Wherein, only have two sides of tail margin line and ancon on the pressure side curvature be the hydrodynamics sensitivity. Major requirement has 2 points, and it is long-pending that the first progressively reduces the leaf slot cross-section, reaches design area during to outlet; It two is to have good mechanical property. Process has unlimited multiple possible selection in the middle of it, wherein have and can seek the design of optimum, but basic demand is marginal slickness. Ensure margin line mathematics smooth be requirement to single order spatial variations rate, it is the direction continuity of flow velocity that corresponding mechanics is worth. Not separation of flow mechanical equation check is main uses the Newton's law of particle curvilinear motion and as the pressure reduction checking computations of power resources, generally can both be met.

Above-mentioned detailed protocol is compared with the prior art widely different, but reasonable. First, the leaf well width of limited number of blade impeller is how much limited, becomes with sine that blade moves towards the angle time than, blade front middle part to be designed to straightway and larger radius of curvature section and to be radially tendency, the sectional area of its leaf groove and entrance thereof is maximized, its relative velocity thereby minimum. The second, L shaped blade is the selection a kind of inevitable or that optimize that reduces behind the runner exit area. Because, little outlet impeller girth yardstick distribute inevitable each other from, this just need a wheel along upper arcuate structure construct this from, and as leaf concentrated flow road and wheel go out isolation and the bearing structure of oral region, this structure can only be crooked blade afterbody.

This improvement project of the present invention has also reduced subtended angle of blade, thereby has shortened leaf concentrated flow journey when increasing leaf slot cross-section is long-pending. The compared to prior art design of backward bent vane, the sectional area of its leaf groove loading zone approximately increases 1 times, and the leaf groove loads acting district flow process and approximately reduces 50%. Calculate by this rough valuation, than the identical conventional centrifugal pump impeller of diameter, rotating speed and flow, the flow velocity of the present invention program's leaf groove loading zone will reduce by 50%, and the frictional dissipation on its unit length will reduce 75%, thereby the frictional dissipation on the way of its leaf groove loading zone will reduce 87.5%.

The leaf slot tail of this improvement project is accelerating region, and its sectional area reduces quickly continuously with appropriate rate of change, flow velocity thereby promptly increase continuously, and this is the conversion process of energy in the rotating coordinate system, and certain loss can occur. During the specific design acceleration channels, should determine an anti-size that pushes away of appropriate sectional area rate of change from the discharge area of flow and the decision of outlet relative velocity, spatial variations rate and the leaf groove shape of flow velocity all will therefrom be determined. Because this flow process section is very short, when the K=0.5 left and right sides, hydraulic loss is not remarkable. The fundamental equation of accelerating sections is: than kinetic energy increment=than potential energy decrement * efficient, efficiency factor wherein is relevant with factors such as sectional area rate of change and surface quality, with reference to the similarly empirical data analysis of fluidics, its acceleration efficiency can reach 98% usually, therefore, the result by the potential flow theories analysis is: whole hydraulic loss of L shaped blade passage will have obvious minimizing compared to prior art. In fact, further comparative benefits is with main difference from the flowing field stability aspect, because the impact of the wild effects such as turbulent flow, backflow and tail vortex that the factors such as the relative vortex abduction that large opening causes and Secondary Flow cause, the hydraulic loss of prior art impeller channel is larger. By contrast, the flow field destabilizing factor of L shape blade scheme of the present invention is few, the relative vortex impact in the leaf groove, does not exist outlet to reflux and the trailing edge whirlpool, and its impeller hydraulic efficiency will greatly improve. Moreover the present invention also has the technical characterictic of follow-up explanation can substantially stop the interior relative vortex of leaf groove, and its efficient will have more advantage.

The radially tendency of improvement project Leaf front middle part of the present invention also has obvious meaning for improving cavitation resistive property. In the prior art, the most serious zone of cavitation erosion harm is the suction side of blade both sides, inlet region and outlet area. For the inlet region, blade design spacing of the present invention is multiplied, and its flow velocity will reduce by half under same design discharge. The cooperation of the self adaptation prerotator of introduction is described as adding aftermentioned, and this impeller will have the anti-cavitation characteristic in particularly preferred inlet region. For outlet area, because complete constraint, trailing edge whirlpool or suction surface low-pressure area do not exist, at higher direct draught without the cavitation erosion possibility.

Front middle part of the present invention is tendency and the 90 L shaped blade designs of spending inlet angles radially, it is a kind of special design that is suitable for the high potential ratio centrifugal pump, has the advantage that subtended angle of blade is little, leaf groove front middle part sectional area is large, flow process is short, flow velocity is low thereby frictional dissipation is little, for low-specific speed impeller, its advantage will be more obvious. This impeller also has the advantage that impeller flow process hydraulic efficiency is high, anti-cavitation characteristic is good concurrently except exporting the moving main target characteristic than liquid stream of high gesture.

The present invention also comprises a supporting attachment design, that is: an axially or radially incoming flow self adaptation prerotator with the impeller coaxial rotating is equipped with in the outlet of impeller suction chamber or prime air deflector, prerotator is comprised of elasticity sail formula blade, wheel rim and rigidity rib, its number of blade is less than the impeller blade number, blade is made by composite, has the elongation eleasticity factor that is increased gradually to root by front end, radially be fixed on the rigging position that the equal angles of wheel rim distributes, wheel rim freely is enclosed within on rotating shaft or the impeller sleeve, the blade front end hangs on the rigidity rib of porch, consists of the runner of prewhirling between the blade. Wherein, axially the rigidity rib of incoming flow prerotator is laid in the radial position on the entrance periphery, and radially the rigidity rib of incoming flow prerotator is laid on the entrance face of cylinder position with shaft parallel. In service, elasticity sail formula blade will be deformed into the self adaptation runner with the variation that liquid flows parameter, its entrance angle of attack and on the way the inclination angle all be adaptive change.

The Centrifugal Pump Design idea of prior art thinks and avoid just prewhirling that its guiding theory is to increase big specific power and lift by increasing the entrance relative velocity. For example the return guide vane exit angle in the prior art multistage pump design specification just is designed to not only eliminate original circular rector, has also applied a reverse circular rector, obviously is for this purpose. The result who does like this, lift is to have improved, but the cost of paying is entrance hydraulic loss increase, anti-cavitation characteristic variation, variable parameter operation adaptability variation. The present invention is based on the idea of conservative circular rector design, advocate before the impeller channel entrance, to hold conservative in the neighborhood or just arrange and prewhirl. The design of self adaptation prerotator is the product of this guiding theory just, and this is opposite with traditional design, and effect is also just in time opposite. The effect of prerotator is, take reduce the original impeller that just should additionally not increase of part than merit as cost, exchange for little, the anti-cavitation characteristic of entrance hydraulic loss good, have the benefit of variable parameter operation adaptivity, thereby be a kind of little large technological tradeoffs of getting of giving up. And the characteristic Design of aforementioned 90 degree entrance channels also needs prerotator supporting.

The self adaptation prerotator is independent modulability acting parts, is equivalent to a special small impeller, is used for adjusting the size of speed of incoming flow and distributing, and makes it to meet the needs that impeller sucks. When the incoming flow rotating energy was not enough, prerotator output was increased than merit. When the incoming flow rotary speed was excessive, prerotator also can sponge redundance in the velocity field arrangement, and self then changes hydraulic turbine duty into. Energy adjusting is a kind of macroscopic statistics effect of incoming flow being carried out the velocity field arrangement, the implication of velocity field arrangement is: carry out the distributed energy exchange by elasticity propeller shape runner, continuously change the spatial distribution of the size and Orientation of speed of incoming flow, make it to adapt in the VELOCITY DISTRIBUTION of leaf groove porch and the decision of whole operating mode.

These characteristic functions of prerotator mainly are that radially tendency is supporting for the front portion with L shaped blade, make simultaneously impeller adapt to the needs of variable parameter operation. The mechanism that realizes these functions is: when duty parameter changed, the variation in suction chamber zone was presented as changes in flow rate and the velocity magnitude that caused by changes in flow rate and the variation of direction. Because prerotator and impeller coaxial rotating, thereby the sail formula blade of the rigidity rib of its porch and suspension is uniform rotation, and the speed that their incision liquid flows can change along with the variation of flow. In a spatial neighborhood of incision line, the distribution meeting of the inertia force of liquid stream and the tension force at soft blade inlet position each point on blade is reached a kind of balance, the geometry effect that this dynamic balance point compiles is that the top of sail formula blade changes the angle of attack with the adaptively variation with speed of incoming flow, thereby automatically keeps the state tangent with the incoming flow streamline. The variation that this mechanism has solved conventional impellers size and Orientation of speed when flow changes will cause producing with the fixing leaf development bump of angle the unconformable problems of power condition changing such as entrance turbulent flow.

Incoming flow more can keep tangent mobile state in the follow-up runner zone of prewhirling after the inlet region is without tangent the entering of bump, its mechanics principle remains inertia force and blade tension force and the bending resistance equilibrium of forces of liquid stream. Wherein, to constraint strength, until the outlet that is connected with impeller channel, its Way out will be the impeller eye direction to increasing blade radial bending strength basically with step-up procedure. Incoming flow is subjected to the effect of blade restraining force to continuously change the size and Orientation of speed in the propeller shape runner that this flexibility progressively reduces, just had the direction of being preset during to the exit, runner velocity magnitude everywhere then can change with changes in flow rate, and the variation of speed everywhere then is the result that blade retrains and carries out energy exchange because of constraint under the same flow.

Prerotator makes impeller inlet region streamline when variable-flow is worked evenly and steadily not produce bump, turbulent flow and separation of flow loss. This makes the inlet region hydraulic loss keep low-level, and cavitation characteristic also is greatly improved.

Series Design of the present invention also comprises the feature that another is even more important, and that is exactly: the average rate turnout of laying the relative vortex of containment in the impeller leaf groove. Each leaf concentrated flow road is vertically cut apart by 1～3 average rate comb leaf, forms 2～4 turnouts. The turnout entrance approaches and does not reach leaf groove entrance, its sectional area uniform distribution. Turnout outlet approaches and does not reach the outlet of leaf groove, and sectional area distributes according to the power of the relative vortex that superposes and given VELOCITY DISTRIBUTION is determined or the empirical data distribution optimized by optimization test. Average rate comb leaf applies the resistance suppressioning force to relative vortex, forms uniform leaf groove VELOCITY DISTRIBUTION, and produces required inlet pressure gradient and muzzle velocity gradient.

Leaf groove average rate of the present invention turnout is that this affects the custom-designed special structure of key issue of impeller hydraulic efficiency in order to solve relative vortex. Vortex is the inertia motion form of limited number of blade impeller internal freedom fluid relatively, and this athletic meeting produces the velocity structure different from unlimited number of blade impeller and changes it than merit value, makes the theoretical head of pump reduce by 15%～25%. In addition, vortex also directly produces serious loss relatively, and its speed and pressure are uneven distributions, and it is superimposed on leaf concentrated flow field, forms backflow, turbulent flow and low pressure separation of flow district, produces larger loss, and actual lift is further reduced. The relative vortex of liquid stream stack can produce the additional pressure reduction between pressure face and the suction surface, directly forms additional drag square and secondary power loss, and nullified ratio than merit increases, and this also is one of further reason that reduces of actual lift.

From the pressure coefficient method PRACTICE OF DESIGN of centrifugal pump, also can see the seriousness that goes wrong. Do not have the theoretical pressure coefficient of the unlimited number of blade impeller of relative vortex to equal 2, wherein be respectively 1 than potential energy with than kinetic energy partial pressure coefficient. But the pressure coefficient of the design of conventional centrifugal pump can only reach about 1 usually, and the highest only has 1.1. The minimizing value of pressure coefficient is more than 0.9, and its main cause has three: limited blade makes the delivery ratio merit reduce to reduce with theoretical head; The impeller loss of flow descends actual lift; The water conservancy diversion loss of flow further descends actual lift. Front two large reasons in the three large reasons all are that relative vortex haunts, and this shows the relative vortex of containment importance technically.

The relatively intensity of vortex dull increase along with the minimizing of the number of blade. Equal the ratio yardstick that 6～8 such routines are selected for the number of blade, the absolute value of volution theory angular speed almost equates with vane angle speed relatively, the maximum of its Molded Line speed is about about 1/3 of impeller circumferential speed, numerically may reach tens meters of per seconds. It is synthetic that large like this vortex velocity and less relative velocity carry out vector, flow out the larger conventional impellers of bicker for liquid, reflux producing the suction surface high-speed forward stream of absolute value than the high 1 times of relative velocity of edge vortex velocity, producing absolute value than the low 1 times of relative velocity of edge vortex velocity but still belong to pressure face at a high speed. Although limit friction and inner viscous force can be contained this high velocity stream, can make it drop to a lower equilibrium valve, loss produces thereupon. When relatively the backflow, turbulent flow and the separation of flow problem that produce of vortex is serious, the design outlet of impeller will be tied up a part, become the idle space of empty increase and lose consumption, and may generate leaf frequently pressure wave and the radial vibration that produces hundred hertz of levels. Certainly, for the present invention, outlet refluxes and eliminates fully, and the problems referred to above have solved major part, and still, the relative vortex of inside, leaf concentrated flow road but still exists. Therefore, adopt a kind of resistance but not the method for the resistive relative vortex of containment is used for being applied with targetedly shear moment, blade suction surface is slowed down and pressure face is accelerated, absorb simultaneously and transform remaining volution energy, just become the improvement design of a kind of necessity of the present invention.

Average rate of the present invention turnout is the product of above-mentioned design philosophy just. According to described designing requirement, the average rate turnout is laid in broad place, cross section, middle part before the leaf concentrated flow road, and the runner sectional area tied up coefficient and little. By aforementioned analysis as can be known, the flow velocity at the wealthy place of leaf groove width is originally lower, if relative vortex is stopped, then vortex velocity is to just the superposeing and will be eliminated the negative stack of pressure face of suction surface, and the leaf groove will revert to normal low speed fluidised form. The present invention contains that the principle of relative vortex is: radially pressure face and the suction surface restraining force on the turnout of tendency are uneven distributions 1), substantially, they can form to the vortex center on each turnout the countershear square on the periphery, and its effect is equivalent to increase the number of blade; 2), L shaped blade cooperates the inside and outside wall that makes the turnout not isometric with the bending of turnout structure, inside and outside turnout is not isometric and differ larger, its on the way the difference of resistance with to hold back the demand that hinders vortex power consistent; 3), the more important thing is, the uneven distribution of turnout discharge area is being controlled the inside and outside flow velocity on each turnout, there is higher muzzle velocity on the turnout that makes nearly primary blades suction surface and there is lower muzzle velocity on the turnout of nearly pressure face, the difference of its reaction drag will be in the containment moment of periphery generation with respect to whole leaf groove vortex center, in other words, the difference of its reaction drag just in time equals the vortex power difference of turnout transport motion, thereby realizes that desirable speed evenly distributes.

Because the turnout is distributed in the non-import and export zone of blade tip, so also can there be less relative vortex tendency in remaining import and export zone. Described scheme requirement, the ratio of the discharge area on average rate turnout should produce appropriate inlet pressure gradient, in order to generate the shear moment of containment inlet region vortex, also should produce appropriate muzzle velocity gradient, in order to change the pressure distribution of turnout outlet, the nearly pressure face of injection turnout, and reduce the outer wheel week friction of leaf groove outlet area. In detail accurately dynamics calculation or asymptotic test all can be accomplished described appropriate, its result will implement for the turnout structure specifically than size and make it to optimize. Need to prove, most of vortex power forms when accelerating pressure in nearly suction surface turnout and has been offset by the reaction drag, the problem that in rotating coordinate system, does not have positive volution energy accumulation, what be subject to the vortex power impact will only have the liquid stream that flows out along positive direction, and its specific energy increment has formed described velocity gradient.

The average rate turnout is a very important innovation. Appropriate turnout discharge area is than can two dimensions in the leaf groove realizing that resistance is balanced, almost the relative vortex in the impeller channel can be stopped fully, therefore the hydraulic efficiency of impeller channel will increase substantially, and its cavitation characteristic also will be greatly improved. The properties that the average rate turnout will make impeller to effective containment of relative vortex is all close to the performance of unlimited number of blade impeller, wherein most important contribution comprises the recovery of theoretical head, comprises that also the minimizing because of the hydraulic loss of impeller flow process reduces the difference of theoretical head and actual lift.

Because the theory with the L shaped blade impeller on average rate turnout is in close proximity to unlimited number of blade Eulerian equation rule than merit and theoretical head, thereby can enable the performance that this equation is discussed limited number of blade high potential ratio impeller.

Equal 90 degree and the angle of outlet approximates under 0 condition of spending in the inlet angle of L shaped blade impeller runner (relatively fluid flow angle), according to the entrance and exit speed triangle, v is arranged₁ ²＝u ₁ ²+w ₁ ²And v₂ ²＝(u ₂-w ₂) ² Introduce again impeller eye velocity of following coefficient χ=u₁/u ₂With entrance relative velocity coefficient μ=w₁/w ₂Two parameters then have u₁ ²＝u ₂ ²χ ²，w ₁ ²＝u ₂ ²μ ²K ²，w ₂ ²＝u ₂ ²K ²， v ₂ ²＝u ₂ ²(1-K) ²And v₁ ²＝u ₂ ²(χ ²+μ ²K ²), utilize these relational expressions that Ou Lashi is more every to u than all of merit equation₂Normalization gets the setup parameter form of equation such as (3) formula, wherein comprises significant theoretical pressure coefficient ψ_T, its expression formula is such as (4) formula.

Y _T＝0.5ω ²R ₂ ²((1-χ ²-K ²(1-μ ²))+(1-χ ²-2K+K ²(1-μ ²))

  ＝ω ²R ₂ ²(1-χ ²-K)  ……………………………………………………………  (3)

ψ _T＝(1-χ ²-K ²(1-μ ²))+(1-χ ²-2K+K ²(1-μ ²))

   ＝2(1-χ ²-K)  …………………………………………………………………  (4)

In two formulas, (1-χ²-K ²(1-μ ²)) be than potential energy incremental pressure coefficient, (1-χ²-2K+K ²(1-μ ²)) be than kinetic energy incremental pressure coefficient, K is the feedback speed reducing ratio, ω is vane angle speed, R₂Be impeller radius. Because entrance velocity of following coefficient χ=u₁/u ₂Value equal the ratio R of impeller inlet/outlet radius₁/R ₂, be a changeless geometric parameter. Again according to the characteristic of incompressible fluid, entrance relative velocity coefficient μ=w₁/w ₂Value equal the inverse ratio S of impeller channel inlet/outlet sectional area₂/S ₁, also be a changeless geometric parameter. After parameter transformation, equation only comprises peripheral speed and 3 normalization coefficients of impeller, and this has just made things convenient for the analysis discussion to the novel impeller characteristic widely.

Keeping in equation (3) and theoretical pressure coefficient expression formula (4) than potential energy increment with than the expression formula of kinetic energy increment partial pressure coefficient has multiple needs, and the theory analysis of two kinds of energy production, theory and actual gesture are moved analysing because of variation of ratio all needs to use them. Obviously, the group item of two expression formulas formation has highlighted than potential energy increment partial pressure with than the mechanics of kinetic energy increment partial pressure and has originated and proportionate relationship. Wherein, be by centrifugal force merit pressure coefficient 1-χ than potential energy incremental pressure coefficient²With the potential energy consumption pressure coefficient decrement item-K that is used for accelerating relative motion²(1-μ ²) algebraical sum form, than kinetic energy incremental pressure coefficient then be by with the blade residue acceleration merit pressure coefficient 1-χ of centrifugal force merit pressure coefficient equivalent², the kinetic energy feedback pressure coefficient increment item K that makes its pressure coefficient decrement item-2K that subtracts merit and accelerate because of relative motion to increase in rotating shaft²(1-μ ²) algebraical sum form.-K²(1-μ ²) and K²(1-μ ²) the existence process that potential energy is converted to kinetic energy when representing that afterbody liquid stream in leaf concentrated flow road accelerates exist, the normalization proportionality coefficient of conversion amount respectively with K positive correlation with the sharp variation of μ negative correlation, but they are cancelled each other in total theoretical pressure coefficient and do not exert an influence. From the above analysis, centrifugal force merit pressure coefficient 1-χ²With blade residue acceleration merit pressure coefficient 1-χ²Both equivalent, this is that centrifugal pump impeller is than the universal law of the distribution of work and lift generation. When not carrying out technical finesse, the theoretical pressure coefficient of centrifugal pump impeller will be 2 (1-χ²), its theoretical gesture is moving than equaling 1. Obviously, two 1-χ have been produced equally among the present invention², under the treatment mechanism effect of kinetic energy feedback technology, impeller has fed back normalization coefficient to rotating shaft and has been the ratio kinetic energy of-2K, and the theoretical pressure coefficient is reduced to 2 (1-χ²-K), theoretical gesture is moving than then therefore obtaining significantly to increase. Because the production of potential energy and kinetic energy has different actual converted efficient, when taking into account loss, need respectively to calculate actual pressure coefficient according to the hydraulic efficiency of flow process separately, at this moment, be the intermediate parameters that to use than potential energy increment with than the theoretical pressure coefficient of kinetic energy increment.

Serious analysis theoretical pressure coefficient because becoming rule, just can see theoretically this blade construction scheme of the present invention clearly is raising the efficiency and is improving advantage on the operation characteristic, and then can find it than the great potential in the merit output control, this discovery will become the theoretical foundation of design controllability centrifugal pump and self controllable property intelligence centrifugal pump.

Equation (3) shows, in the formation of theoretical pressure coefficient of the present invention, account for the overwhelming majority than potential energy incremental pressure coefficient, and be smaller than the numerical value of kinetic energy pressure coefficient, and, owing to the decrease of absolute velocity increases substantially the hydraulic efficiency of water conservancy diversion flow process, thereby the actual pressure coefficient of pump is in close proximity to the theoretical pressure coefficient. Based on the reason of this two aspect, when carrying out Impeller Design, basically can replace the former with the latter. Such as the need accurate Calculation, then can use the water conservancy diversion effectiveness formula or use further omnidistance hydraulic efficiency formula to revise. High potential ratio centrifugal pump theoretical pressure coefficient is listed in table 4 with the situation of χ and K change.

Table 4 high potential ratio centrifugal pump theoretical pressure coefficient ψ=2 (1-χ²-K) change conditions table

χ＝0.4	1.48	1.28	1.08	0.88	0.68	0.48
							χ＝0.5	1.30	1.10	0.90	0.70	0.50	0.30

With reference to table 4, the theoretical pressure coefficient reduces along with the increase of feedback work done factor K linearly along with the increase of velocity of following coefficient χ becomes quadratic relationship ground to reduce. Both true decimals, thereby the latter have higher sensitiveness, and it makes the high potential ratio centrifugal pump have the approximate constant power characteristic of self adaptation Power Regulation and good linear restriction characteristic. χ is a design geometric parameter, is limited by flow, entrance flow velocity and the diameter of axle, and its value is generally about 0.2～0.3, and is little for the impact of theoretical pressure coefficient.

Theoretical gesture with impeller of aforementioned techniques feature of the present invention is moved than being:

λ _T＝(1-χ ²-K ²(1-μ ²))/(1-χ ²-2K+K ²(1-μ ²))……………………(5)

Because the hydraulic efficiency of impeller flow process section of the present invention is very high, thereby the moving ratio of actual output gesture can be very near the moving ratio of theoretical gesture. Mainly from the impact of entrance and accelerating sections loss, entrance loss impact output is than potential energy for both difference, and the accelerating sections loss both affects, because this class loss falls too low, usually can ignore. In the actual span of K, μ, χ, the number range that λ T can reach is about 3～9. Its physical significance is, the pressure potential increment that the high potential ratio impeller is produced will for the 3-9 of the kinetic energy increment that embodies with liquid stream absolute velocity doubly. As seen, high potential ratio characteristic of the present invention is very significant.

Not identical concept than kinetic energy increment with than kinetic energy. When investigating object and be impeller, get involved to require this two concepts differences to use such as prerotator, the outside energy such as external source actuating speed that enter to manage liquid stream. When investigating object and be whole centrifugal pump, except there being the entering the pipe speed of external source driving, these two concepts can be considered same. In addition, when paying close attention to the water conservancy diversion load, require to investigate than kinetic energy increment, when paying close attention to the water conservancy diversion loss, require to investigate and compare kinetic energy. In fact, both normalization coefficient difference are only at a high-order a small amount of μ²K ², its numerical value obviously is very little, can ignore fully in general analysis.

When getting canonical parameter μ²=0.1 o'clock, than kinetic energy pressure coefficient ψ₂’＝(1-K) ², than potential energy incremental pressure coefficient ψ₁＝(1-χ ²-0.9K ²), than kinetic energy incremental pressure coefficient ψ₂＝(1-χ ²-2K+0.9K ²), the moving λ that compares of gesture_T＝ψ ₁/ψ ₂, their change conditions is listed in table 5.

Table 5 is than kinetic energy pressure coefficient, than potential energy incremental pressure coefficient, more moving than the change table than kinetic energy incremental pressure coefficient and gesture

Feedback speed reducing ratio K		0.1	0.2	0.3	0.4	0.5	0.6
								χ＝0.1	ψ 1	0.981	0.954	0，909	0.846	0.765	0.666
ψ 2	0.799	0.626	0.471	0.334	0.215	0.114
							λ T		1.228	1.524	1.930	2.533	3.558	5.842
χ＝0.2	ψ 1	0.951	0.924	0.879	0.816	0.735									0.636
							ψ 2	0.769	0.596	0.441	0.304	0.185	0.084
	λ T	1.237	1.550	1.993	2.684	3.973								7.571
							χ＝0.3	ψ 1	0.901	0.874	0.829	0.766	0.685		0.586
ψ 1	0.719	0.546	0.391	0.254	0.135	0.034
								λ T	1.253	1.601	2.120	3.016	5.074	17.24
	ψ 1	0.831	0.804	0.759	0.696	0.615									0.516

χ＝0.4	ψ 2	0.649	0.476	0.321	0.184	0.065	-
								λ T	1.280	1.689	2.365	3.783	9.462	-
	χ＝0.5	ψ 1	0.741	0.714	0.659	0.506	0.525								0.426
ψ 2								0.559	0.386	0.231	0.094	-	-
		λ T	1.326	1.850	2.896	6.447	-							-
ψ 2’								0.81	0.64	0.49	0.36	0.25	0.16

From table 5, can see, two partial pressure coefficients all reduce along with the increase of χ and K, but rate of change has obvious difference, this species diversity causes gesture moving than increasing along with the increase of χ and K, comparatively slow with the variation that χ increases, but very responsive with the variation that K increases, actual design is needed just for this. K conduct and χ²Regulated quantity of equal value obviously should have higher sensitivity, and K also is different from the χ that is subjected to structural constraint as geometric parameter, can enjoy larger arrange independence and flexibility. The span of K is usually more suitable about 0.5.

At theoretical pressure coefficient ψ=2 (1-χ²-K), than potential energy incremental pressure coefficient ψ₁＝1-χ ²-K ²(1-μ ²) and than kinetic energy incremental pressure coefficient ψ₂＝1-χ ²-2K+K ²(1-μ ²) in, (1-χ²) as centrifugal force merit or blade residue acceleration merit pressure coefficient item, they are respectively the unique of two partial pressure coefficients or the first source, its size change is such as table 6.

Table 6 centrifugal force merit pressure coefficient and residue acceleration merit pressure coefficient equivalent change table

Enter relative aperture χ	0.1	0.2	0.3	0.4	0.5	0.6	0.7
								Centrifugal force merit pressure coefficient	0.99	0.96	0.91	0.84	0.75	0.64	0.51
Residue acceleration merit pressure coefficient	0.99	0.96	0.91	0.84	0.75	0.64	0.51

As the only source than potential energy incremental pressure coefficient, the centrifugal force merit pressure coefficient that table 6 provides obviously is the upper limit of this coefficient. As the first source than kinetic energy incremental pressure coefficient, the residue acceleration merit pressure coefficient that table 6 provides consist of this coefficient mainly on the occasion of part, hour especially true at χ and K. Integrate consideration, as previously mentioned, the source of energizing of two equivalent of the theoretical pressure coefficient that two given pressure coefficients of table 6 are centrifugal pumps, they with the upper limit of the theoretical pressure coefficient that has determined pump. When canonical parameter χ=0.2～0.3 left and right sides is arranged, be limited to about 1.92～1.82 on this. Consider that the design pressure coefficient of prior art is usually about 1.0. Therefore, adopt the present invention's of same wheel footpath and same rotating speed impeller, in the time of reaching same design pressure coefficient, also have pressure coefficient space about 0.92～0.82 and be used for arranging the pressure coefficient loss that feedback speed reducing ratio K and planning have greatly reduced. At this moment gesture is moving can to reach 3～5 than approximately, has basically satisfied the demand. If need to further increase the moving ratio of gesture, then can suitably reduce the pressure coefficient design load, reach rated lift to increase rotating speed or suitably to add bull wheel way directly. Because the relevant power of the former disk friction loss is lower, usually should preferentially adopt the former. But adopt after the present invention's inner antifriction technical characterictic described later, the disk friction loss will become the problem that need not special scruple, at this moment, reduce audaciously pressure coefficient and will improve the moving ratio of gesture, can obtain higher hydraulic efficiency and gross efficiency.

In sum, the present invention has carried out improving comparatively thoroughly to the impeller of prior art centrifugal pump, and technical characteristics comprises:

1), impeller channel adopts the traditional method of indicating the pronunciation of a Chinese character separate mutually cloth to little outlet, produces the kinetic energy feedback reduction gear mechanism, resistance improves the moving ratio of gesture;

2), adopt L shaped blade, its front end is leaf groove radially, sectional area is large and cornerite is little, flow velocity is low and flow process short, its afterbody produces wheel along effect of contraction, eliminates reflux and separation of flow phenomenon fully;

3), average rate turnout resistance be set in the leaf groove eliminate the relative vortex of leaf groove, leaf concentrated flow road velocity field is evenly distributed, eliminated the rapid resistive pressure reduction between the wild effect such as turbulent flow, trailing edge whirlpool and pressure face and the suction surface.

These corrective measures can realize following function or performance characteristic:

1), reduce and to enter to lead speed, reduce the water conservancy diversion loss, the loss of elimination impeller increases substantially omnidistance hydraulic efficiency;

2), possess the adaptability of variable parameter operation, the hydraulic efficiency of low discharge operation is not to descend but improve;

3), theory that increase impeller be than merit and theoretical head, make it close to unlimited number of blade Eulerian equation rule;

4), make the pressure coefficient loss of impeller flow process and water conservancy diversion flow process reduce to very little, make actual lift close to theoretical head;

5), in fundamental equation, insert the feedback work done factor K that can set flexibly, make theoretical head, actual lift and hydraulic efficiency all with the dull sharp variation of feedback work done factor K, thereby established the technical foundation of controllability and self controllable property centrifugal pump.

The present invention has also given the concern of emphasis for the disk friction loss problem that causes mechanical efficiency main loss in the centrifugal pump and large and unsettled axial thrust problem, designed and reached second goal of the invention technical scheme: the two side ends chamber of double shrouded wheel wheel disc or the bonnet side chamber of half-opened impeller have been placed gas circulation or gas-liquid two-phase flow circulation process, the full insoluble gas in end chamber, hub disk rotates in gas phase media, its frictional dissipation is very little, the pressure of end chamber gas dynamically keeps in circulation and end edge, chamber rotated flowing liquid surface pressure equilibrium of forces, and be equal to or less than impeller output static pressure, when all inflate in the chamber, front and back end, both specific pressures equate or are close, the axial force that gas applies impeller equals the product of gas pressure and impeller face area, and is irrelevant with size and the leakage flow of leakage-gap.

Disk friction be a kind of and lift and flow without the stationarity loss of direct correlation, its size is directly proportional with 5 powers of impeller diameter, is directly proportional with 3 powers of rotating speed, the loss in efficiency that causes can not be ignored. For situations such as low specific speed, high-lift and off-design operating mode low discharge operations, the relative effect of disk friction is especially serious. Numerical analysis shows, this kind loss is to cause the particularly lower and lower one of the main reasons of the design efficiency high-lift centrifugal pump that impeller is larger of rotating speed of low specific speed centrifugal pump. In addition, this kind loss also is the decisive reason of efficient degradation when causing the operation of centrifugal pump off-design operating mode low discharge, because, the impact that hydraulic efficiency descends on gross efficiency also has one by the moving asymptotic lower bound than determining of gesture, and the ratio of disk friction loss and effective shaft work then can turn around greater than 1 even much larger than 1 and without limits.

With regard to the axial thrust problem, conventional impellers mineralization pressure side shaft mainly is because output pressure is unbalanced to the effect in two side ends chamber to the mechanism of thrust, the compensating action of the reaction force that suction side liquid amount of flow changes is then relatively too little, and changes with changes in flow rate. Cause the reason of end cavity pressure difference to be, the mean specific pressure that sucks the side chamber is lower and its area is less. Both sides specific pressure difference is by gap width difference, leakage flow direction and carries angular speed difference that the difference of the moment of momentum causes and the factors such as yardstick difference of centrifugal force field cause. Except area and leakage flow direction, these factors all are time-dependent, and change large percentage. Therefore, conventional impellers can produce the axial thrust of the very large and non-stationary of numerical value, and this thrust can cause bearing loss to increase and decrease in efficiency, even also may produce mechanical breakdown. The axial force balance problem has increased the difficulty of Centrifugal Pump Design and manufacturing. Custom-designed balancing frame device has increased structural complexity and shafting precision requirement, thereby has increased the cost of pump, and the shunting action of balancing frame can cause volumetric efficiency and gross efficiency to descend.

The effect of inner antifriction scheme of the present invention is dual---can eliminate the disk friction loss of the overwhelming majority, improve the interior mechanical efficiency of pump, can reduce again and stable axial thrust simultaneously. Its antifriction principle is understood easily, because the coefficient of viscosity of gas is than little two orders of magnitude of liquid, thereby when wheel disc end face and gas friction, its frictional dissipation is also corresponding to reduce two orders of magnitude. Because there is random perturbation in the gas-liquid interface (liquid level) in inflation end chamber, at the trough place of perturbation wave meeting gassing escape phenomenon, thereby gas can not be full of whole end chamber fully but in actual applications. Exist in the situation of annular liquid phase region in end outer, chamber, the disk friction loss will be difficult to reduce veritably two orders of magnitude. Have based on this, the ratio (being called for short frictional dissipation Lg) of there is remaining annular liquid phase region in the present invention with when inflation disk friction loss wheel disc frictional dissipation when not inflating is described friction reducing effect, ignore the gas phase friction of inflatable region, this ratio is provided by (6) formula.

${\mathrm{<figure-callout\; id="1"\; label="Z"\; filenames="A20031011702800841.png"\; state="\{\{state\}\}">Z</figure-callout>}}_1/{\mathrm{<figure-callout\; id="2"\; label="Z"\; filenames="A20031011702800841.png"\; state="\{\{state\}\}">Z</figure-callout>}}_2={\&Integral;}_{d1}^{\mathrm{<figure-callout\; id="2"\; label="d"\; filenames="A20031011702800841.png"\; state="\{\{state\}\}">d</figure-callout>}2}\mathrm{\&sigma;}{\mathrm{<figure-callout\; id="3"\; label="r"\; filenames="A20031011702800841.png"\; state="\{\{state\}\}">r</figure-callout>}}^{3}2\mathrm{\&pi;rdr}/{\&Integral;}_3^{\mathrm{<figure-callout\; id="2"\; label="d"\; filenames="A20031011702800841.png"\; state="\{\{state\}\}">d</figure-callout>}2}\mathrm{\&sigma;}{\mathrm{<figure-callout\; id="3"\; label="r"\; filenames="A20031011702800841.png"\; state="\{\{state\}\}">r</figure-callout>}}^{3}2\mathrm{\&pi;rdr}=({{\mathrm{<figure-callout\; id="2"\; label="d"\; filenames="A20031011702800841.png"\; state="\{\{state\}\}">d</figure-callout>}}_2}^5-{{\mathrm{<figure-callout\; id="1"\; label="d"\; filenames="A20031011702800841.png"\; state="\{\{state\}\}">d</figure-callout>}}_1}^5)/{{\mathrm{<figure-callout\; id="2"\; label="d"\; filenames="A20031011702800841.png"\; state="\{\{state\}\}">d</figure-callout>}}_2}^5=1-{({\mathrm{<figure-callout\; id="1"\; label="d"\; filenames="A20031011702800841.png"\; state="\{\{state\}\}">d</figure-callout>}}_1/d_2)}^5\&CenterDot;\&CenterDot;\&CenterDot;\&CenterDot;\&CenterDot;\&CenterDot;\left(6\right)$

Z is compared in frictional dissipation₁/Z ₂That end chamber inflated diameter is than (d₁/d ₂) function, the former be when disturbance is arranged to the estimating of friction reducing effect, the latter be when disturbance is arranged to directly the estimating of inflation effect, the frictional dissipation of calculating by (6) formula sees Table 7 than numerical value.

Tables of data was compared in the wheel disc frictional dissipation when not exclusively inflated in table 7 end chamber

Inflated diameter compares d1/d 2	0.90	0.92	0.94	0.95	0.96	0.97	0.98	0.99
									Z is compared in frictional dissipation1/Z 2	0.41	0.34	0.27	0.23	0.18	0.14	0.10	0.05

As can be seen from Table 7, when the inflated diameter ratio reaches 96% when above, the disk friction loss ratio will reduce to below 18%, and when the inflated diameter ratio reaches 99%, the disk friction loss ratio will be reduced to 5%. Can find out that actual friction reducing effect can be that frictional dissipation reduces an order of magnitude, rather than two orders of magnitude.

The loss that the below's concrete analysis inner antifriction designing institute of the present invention reduces and the quantitative relation between the efficiency of centrifugal pump index. Comprise the efficiency of centrifugal pump formula of classical concept such as (7) formula

η＝η _mη _i＝η _mη _hη _v(1-P _r/P _i)  ………………………………………(7)

η, η in the formula_h、η _v, be respectively gross efficiency, hydraulic efficiency and volumetric efficiency, (1-P_rP _i) be interior mechanical efficiency, η_m＝P _i/ P is outer mechanical efficiency, η_i＝η _hη _v(1-P _rP _i) be internal efficiency, P, P_r、P _iBe respectively shaft power, interior mechanical loss power and internal power. Inner antifriction scheme of the present invention makes the disk friction loss reduce an order of magnitude, thereby interior mechanical loss power P_rAlso be reduced to equal proportion (Z₁/Z ₂)P _r, and make internal power P_iAlso become P_i-(Z ₁/Z ₂)P _r, interior mechanical efficiency, internal efficiency and gross efficiency thereby the raising of corresponding amplitude is arranged.

Mechanical efficiency, hydraulic efficiency and volumetric efficiency are unknown and suppose under the prerequisite that they all remain unchanged outside, through slightly numerous derivation and calculating, and the efficiency gain data of inner antifriction technology that can be under the supposition service condition such as table 8, table 9. Because the loss in efficiency that the disk friction loss causes has than big difference, thereby must discuss respectively and calculate. The efficient that table 8 and table 9 have provided respectively behind small-sized or low specific speed centrifugal pump and the large centrifugal pump inner antifriction improves data.

Table 8 is small-sized, low specific speed centrifugal pump inner antifriction behind efficiency improves tables of data

Gross efficiency during without disk friction		80％	70％	60％	50％	40％
							Disk friction is arranged, and efficient falls 10%		70％	60％	50％	40％	30％
Antifriction 82%	Gross efficiency	78.0％	68.0％	57.9％	47.8％	37.7％
							The gross efficiency increment	+8.0％	+8.0％	+7.9％	+7.8％	+7.7％
	Antifriction
90%		Gross efficiency	78.9％	68.9％	58.8％	48.8％	38.7％
								The gross efficiency increment	+8.9％	+8.9％	+8.8％	+8.8％	+8.7％

With reference to table 8, the 1st row and the 2nd row hypothesis antifriction condition in the table, disk friction causes 10% declared efficiency decline under several efficient possibilities. Rear 4 line display frictional dissipations are than being 0.18 and 0.10 o'clock antifriction synergy data. In the prior art, disk friction loss small-sized, low specific speed centrifugal pump is relatively serious, may cause the declared efficiency about 10% to descend, and during the low discharge operation, the amplitude of decrease in efficiency may reach more than 20%. After adopting the inner antifriction scheme, the inflated diameter specific energy of establishing this class pump reaches 96%～98%, and according to table 7, its disk friction loss ratio will be between 0.18～0.1. As shown in table 8, its declared efficiency will improve 8～9%, have a big increase when efficient is high, and amplification reduced slightly when efficient was low.

The big-and-middle-sized centrifugal pump inner antifriction of table 9 behind efficiency improves tables of data

Gross efficiency during without disk friction		90％	80％	70％	60％	50％
							Disk friction is arranged, and gross efficiency falls 6%		84％	74％	64％	54％	44％
Antifriction
	90%	Gross efficiency	89.4％	79.4％	69.3％	59.3％	49.3％
								The gross efficiency increment	+5.4％	+5.4％	+5.3％	+5.3％	+5.3％
Antifriction 95%		Gross efficiency	89.7％	79.7％	69.7％	59.7％	49.7％
	The gross efficiency increment							+5.7％	+5.7％	+5.7％	+5.7％	+5.7％

With reference to table 9, the 1st row and the 2nd row hypothesis antifriction condition in the table, disk friction causes 6% declared efficiency decline under several efficient possibilities. Rear 4 line display frictional dissipations are than being 0.10 and 0.05 o'clock antifriction synergy data. In the prior art, the disk friction loss numerical value of big-and-middle-sized centrifugal pump is very large, but the loss in efficiency that causes generally can be controlled at 6% or below. During the low discharge operation, the amplitude of decrease in efficiency can surpass this value. After adopting the inner antifriction scheme, the inflated diameter specific energy of establishing this class pump reaches 98%～99%, and according to table 7, its disk friction loss ratio will be between 0.10～0.05. As shown in table 9, its declared efficiency will improve 5.3%～5.7%, amplification and efficient positive correlation, but difference is very little.

The inner antifriction technology also has obvious superiority aspect balance and the stable axial force. For the both sides inner antifriction scheme of double shrouded wheel, because the pressure difference of gas phase centrifugal force field is minimum, thereby the two side ends chamber can think to have identical specific pressure, its pressure difference size at bearing area. Consider that impeller eye typically has a diameter from about 1/3 of impeller diameter, deduction rotating shaft sectional area, the bearing area in the suction side chamber of pump is little by 5%～9% with a specific pressure side, add the compensating action of the fluid diversion dynamical reaction that bears the suction side, when running well, the difference of the axial force that the impeller both sides are suffered may drop to the level of 2～5 % of the lateral pressure of exerting pressure. And this pressure differential will only slightly change with the change of flow, not have the disturbing influence of other uncertain factors, thereby easily balance and control. For half-opened impeller, it is on the pressure side behind the inner antifriction. The axial thrust that produces will no longer be subjected to the impact of tip leakage flow and be tending towards constant, although the relevant variable of suction side is still more, its counterbalance effect is less better, and the stability of axial force will obviously be better than the impeller do not inflated.

Inner antifriction method and device thereof are the important component parts of the invention design of General Promotion efficiency of centrifugal pump of the present invention, and both other inventive features capable of being combined were used together, can implement separately again, thereby have the attribute of independent invention.

When this design is applied to the prior art centrifugal pump, be equivalent at first capture the third-largest bottleneck of restriction efficient, shown in table 8, table 9, can have 5～9 percentage points efficient to improve, this has been very considerable benefit, and implementation cost is very low. Because the prior art centrifugal pump do not have this structural planning, wherein many ends chamber is open large opening, and this just is difficult to inflate and keep the stable of gas bag. Only narrow down to when becoming a little gap at end chamber opening, the prior art centrifugal pump could be installed aerating device easily, will provide this design in the embodiments of the invention explanation. When the inner antifriction technology was applied to the high potential ratio centrifugal pump, because the loss of first bottleneck water conservancy diversion and the second largest bottleneck impeller loss problem of restriction efficient all solve, the hydraulic efficiency of centrifugal pump and gross efficiency basis increased substantially. At this moment disk friction loss problem thereby become the principal element of restriction efficient and rise to first bottleneck adopts inflation antifriction technology, and the amplitude that its efficient improves also slightly increases.

The specific design of inner antifriction of the present invention comprises that gaseous species is selected, the end cavity pressure reduces and inflated diameter drives than increasing method, circulation and the solution of Flow-rate adjustment. The selecting of gaseous species be satisfied and the requirement that is pumped liquid and harmful physical and chemical reaction does not occur and obtain easily, for example when being pumped liquid and being water, using air is exactly the simplest selection, and prior art has just had to regulate than merit or improve with air and starts and the application precedent of parking transient characteristic. That yes is more low better for end cavity pressure and liquid level perturbation amplitude, they are relevant with the geometry designs at impeller outlet static pressure, exit velocity and outlet position thereof, also relevant with the end cavity gap, should come optimal design by dedicated experiments, the present invention will provide associated a kind of concrete scheme. As for the circulation type of drive, then should consider according to economic factors such as end cavity pressure, bleed pressure and costs, can in the schemes such as pressure cylinder, air pump, gas-liquid two-phase flow pump, select. Although gas circulation is necessary, circular flow does not have strict quantitative requirement, can be in implementing practice adjusts to minimum of a value not affect friction reducing effect as prerequisite. The circulation of pressure fluid also is necessary, and this is cooling shaft seal and the needs that produce leakage-gap pressure reduction, perhaps also may be the energy that drives two-phase flow, and the maximum stream flow during its circular flow should need according to all these is determined. In fact, with regard to the circulation driving and flow-control thereof of inner antifriction, it is selective to exist many available schemes.

A concrete scheme of inner antifriction of the present invention is: comprise the ejector to the inflation of antifriction end chamber, the driving pressure liquid of ejector is by the outlet shunting of pump, its ejecting port connects source of the gas or logical atmosphere by control valve, its outlet output pressure is a little more than the gas-liquid two-phase flow in end chamber, from the paraxial access of static wall antifriction end chamber, two-phase flow separates in the chamber, and gas is constrained in the chamber by the centripetal buoyancy of centrifugal force field, and liquid and unnecessary gas trailing wheel are along entering air deflector in the sideshake. During front end chamber antifriction, realize by installing the choke V-ring groove that separates the shunting two-phase flow at entrance additional or installing the casual lubricated organic material back-up ring of two-phase flow envelope additional or connect in addition the direct plugging gap of pressure fluid in the choke gap that the gap of logical suction chamber prevents escape of gas instead. Wheel disc end face or also made roughening and process to improve the medium peripheral speed, the chamber wall bus at impeller outlet place or also be designed to have the shape of injection depressurization, to hold cavity pressure to drop to below the outlet static pressure so that go out the living jet action of oral fluid miscarriage, in real time adjustment drives liquid stream flow and by the ejection gas flow, end chamber gas-liquid interface is stabilized near the wheel edge.

Ejector relies on the work of momentum-exchange principle, although the not high cost of efficient of itself is very low, volume is very little, has been widely used in the transformation operation of low discharge fluid. Because pressure fluid and front and back flow process thereof all are ready-made in main equipment, thereby come driving gas to realize that the inner antifriction of centrifugal pump is a kind of just right design with ejector. Practice shows that when the driving flow stream pressure was above than the high 0.05MPa of goal pressure, ejector produced obvious injection pressurization with regard to enough injection kinetic energy is arranged. Check jet effect and the parameter that affects efficient be working head than ε, this parameter is decided by (8) formula.

ε＝(P ₄-P ₂)/(P ₁-P ₂)……………………………………………………(8)

P in the formula₁、P ₂、P ₄Be respectively fluid pressure input, citation jet body pressure and output pressure, then be respectively outlet of centrifugal pump pressure, bleed pressure and destination end cavity pressure according to described connectivity scenario. The characteristic of ejector is: working head is than lower, and the flow of required pressure fluid is just less. By (8) formula as can be known, reduce P₄With at P₁Limit in improve P₂All be the measure that reduces ejector pressure head ratio, wherein consider and comprised (P₄-P ₂) be the situation of negative value. Therefore, reduce P₄With at P₁Limit in improve P₂Can both reduce the flow of pressure fluid.

When chamber, impeller outlet place wall busbar is become to have the shape of injection depressurization, impeller and hold cavity and just become a large static pressure regulation and control ejector, its ejector action can be with antifriction end cavity pressure P₄Be reduced to below the impeller outlet static pressure, thereby play the effect that helps ejector to reduce goal pressure, this is the static pressure adjusting of not consumed power. If implement described scheme in the final stage of single-stage pump and multistage pump, utilize the jet effect of impeller to reduce pressure head than being the important measures that reduce the end cavity pressure and reduce the feedback pressure fluid flow. Reduce the end cavity pressure and also have another important effect, that reduces axial thrust exactly, because this thrust is directly proportional with the end cavity pressure.

When inflated in the end chamber, it was important keeping liquid level (the interfacial radial coordinate of gas-liquid) and the stable of pressure, and this need to get rid of or reduce the impact of various disturbance factors. The such scheme requirement, the end chamber side of wheel disc should have coarse surface, its effect is equivalent to the impeller outside and has installed countless small back blades, can increase the driving force to fluid in the chamber, can make end chamber wheel have higher peripheral speed along near the liquid the district, and make the two-phase flow in input chamber also will increase periphery speed. If the liquid in the two-phase flow directly falls into the gas-liquid interface without this acceleration, will cause velocity shock and affect the stability of liquid level. In such scheme, slightly control flow area and the direction in two-phase flow upstream end chamber, just can obtain a two-phase flow speed that sprays to the impeller end face. The liquid of ejection will split into the roughened end surface that little liquid pearl is attached to impeller, radially rely on viscous force to drive and the increase peripheral speed in the relative motion. The liquid pearl accelerates to reduce the liquid level perturbation amplitude, prevents escape of gas, thereby reduces the flow of gas and pressure fluid, reaches the purpose that improves volumetric efficiency.

Have an annular leakage-gap between the front end chamber of double shrouded wheel and the suction chamber, when passing into two-phase flow from paraxial position, this gap becomes a leakage branch road in parallel, thereby the choke gap that it must be prevented instead escape of gas. Install the choke V-ring groove that separates the shunting two-phase flow additional at the two-phase flow entrance, perhaps install the two-phase flow envelope additional and infiltrate sliding organic material back-up ring, perhaps connect in addition this gap of the direct shutoff of pressure fluid, all can improve the absolute pressure of entrance, play the effect that prevents escape of gas.

Multistage pump by enclosed or half-opened impeller assembling, every one-level all needs an independent ejector and two-phase flow circulation process thereof to keep the gaseous pressure in its end chamber, driving pressure liquid can be obtained from rear class, the flow that this can improve the working head ratio of ejector and reduce pressure fluid. Certainly, final stage can not adopt this method.

Half-opened impeller is without protecgulum and front end chamber, and two-phase flow drives ejector only need drive the circulation of one of chamber, rear end road, and it drives flow and can reduce over half.

The circulation of inner antifriction inflation two-phase flow also can be driven by the liquid stream that gear pump pressurizes, and perhaps by gear pump centrifugal pump output liquid stream is pressurizeed again, and the ejector working head of this type of driving is than high, and the pressure fluid flow is little.

Inflation antifriction scheme also can not adopt the two-phase flow endless form, and adopt the pressure bottled gas behind pressure-reducing valve step-down and control valve adjust flux, directly inject from antifriction end chamber stationary wall, well is shunted a low flow rate liquid from pump discharge and is directly injected mechanical annular seal space and front end chamber leakage-gap, cool off respectively and the shutoff leakage-gap, perhaps, consist of two-phase flow in the return duct that the outlet of the direct injection pump of air-flow of pressure bottled gas behind pressure-reducing valve step-down and control valve adjust flux is drawn, be connected respectively to the paraxial choke gap location of the static wall of the static wall in chamber, rear end and front end chamber, sealing enters respectively, also can reach same effect. At this moment, no longer need ejector to produce two-phase flow, the flow of gas and liquid is regulated respectively, and wherein liquid flow regulating valve is serially connected in the pump discharge isocon.

The introducing of pressure bottled gas or other pressure source gases can make the drive unit of inner antifriction scheme be simplified, and its work is also more reliable and more stable. Water pump for the overwhelming majority, can use bottled, compressed air as pressure gas source, pump for the pumping flammable liquid, can use cheap canned nitrogen as pressure gas source, gas can also be removed by simple Gravity Separation in the gas-liquid separation cavity volume in being installed on output pipe. Design superior inner antifriction device and can reach higher inflated diameter ratio, the efficient of several percentage points that are in operation improves can save a large amount of energy expenditures, and the consumption of source of the gas is seldom, and its expense is insignificant. For example, be Medium-sized Water Pump about 100KW for a shaft power, when efficient brought up to 64% by 60 %, the electrical power of saving was 10.42KW, whenever round the clock can saves energy 250 degree. And the about only need of the gas flow that the driving of its inner antifriction device circulation consumes 0.1 standard state liter/can meet the demands second. Be converted into the energy benefit, when the end cavity pressure is 0.4MPa, 0.1 the compressed air require of standard state liter/second is equivalent to the effective power consumption of 0.1 * 101.3 * 1n (400/101.3)=13.9W, consider 30% source of the gas compression efficiency, also only be equivalent to the power consumption about 46.4W, the input-output efficiency ratio of energy is 225 times.

Why so little the compressed air require that driving circulates consumes is, because except the very little random perturbation of the peak value of gas-liquid interface, it is overstable with nonexpendable that end chamber centrifugal force field is carried out mechanical mechanism that gas-liquid separation and gas preserves, and keeping a little circular flow only is in order to finish initialization procedure and the further internal diameter of the lantern ring that is disturbed of increase in steady-state operation. In fact, the design of circular flow is too strict quantitative requirement not, even can the earthquake order of magnitude. When the design cycle flow hour, its impact only is that the lengthening of initialization procedure time and the lantern ring degree of depth may increase, the former impact can be ignored on the stable state time span and do not affected steady state operating condition, the latter affects steady state condition at probability, but the fluid-tight degree of depth is subject to original just very little disturbance peak amplitude, thereby impact is very little.

The present invention reaches the 3rd goal of the invention solution: air deflector is centripetal guide wheel, and liquid stream flows into from the outer, and extremely paraxial annular chamber converges outflow. It is interior to spiral type that runner is, and radius of curvature reduces and the sectional area flaring gradually, and its entrance or discharge area sum equal respectively design discharge divided by the inlet/outlet design current velocity. Each runner rotating is symmetrical, minute transfer leg and supercharging section. Connect the impeller channel outlet before the transfer leg, the supercharging section is expanded sectional area continuously, meets at the center ring cavity, turn 90 degrees rear axial output. Runner is separated by stator, and stator installation or integrated manufacturing become the semi-open type structure on substrate, perhaps add cover plate and become closed type structure. Substrate center has and rotating shaft axle sleeve movingly.

Prior art employing snail road or guide wheel, lead ring are directly at the outer annular space diversion boosting. When adopting the snail road, conflux and the pressurization that VELOCITY DISTRIBUTION is different share the runner of a non-complete constraint. Conflux conflict with the VELOCITY DISTRIBUTION of supercharging, the large opening of impeller produces the unfavorable factors such as vortex abduction to the snail road, can cause the flow field unstable, and produce local excitation loss, thereby the water conservancy diversion efficient in snail road is minimum. When adopting guide wheel, lead ring, conflux with pressurization still and be stored in the connected space of large opening, both are in the underconstrained state in parallel that connects. Large opening causes relative vortex and other unstable fluidised form abductions of impeller, its recirculating zone even go deep into guide wheel lead ring deep inside, and interface Flow Field Distribution is disturbed in its trailing edge whirlpool. Blade guiding wheel both sides' underconstrained state all causes local excitation loss, and its water conservancy diversion efficient is not high yet.

When needs cascade overcurrent, then the prior art guide wheel turns to rapidly 180 degree to enter anti-ballistic flow process take the axis plane velocity component as the main mechanism that turns to needs to eliminate most of circular rector. Anti-ballistic runner alters a great deal in decyclization amount and the anti-process medium velocity of prewhirling, and its cross section of fluid channel is long-pending with the reducing and reduce of radius, and anti-ballistic accelerator forms centripetal step-down and distributes. It is crossed the un-reasonable phenomenon that accelerates again after the deceleration and has increased the water conservancy diversion load, also is one of factor that lowers efficiency.

Two kinds of traditional air deflectors all do not have variable working condition adaptability, and when flow reduced, local exciting phenomena increased the weight of, and water conservancy diversion decrease in efficiency amplitude is larger. In space utilization, the air deflector of traditional single stage or multistage pump all is located on outside the impeller, and it is many thereby bulky that this has increased the radial dimension of pump. Wherein, the anti-ballistic axial dimension that has also occupied the adjacent axial space of another section and increased pump of taking turns of multistage pump. Bulky snail road, guide wheel and anti-ballistic the wheel have been wasted the space, have increased manufacturing cost.

The present invention is a kind of interior to the Scrawl air deflector according to the centripetal guide wheel of the conservative circular rector design principle structure of whole process, and its supercharging runner is complete constraint, and by optimizing the cumulative sectional area of spreading rate and center line radius of curvature decrescence, and volume is little and water conservancy diversion efficient is high. The Pressure Distribution of centripetal guide wheel is just in time opposite with traditional air deflector, its flowpath pressure with center line and radius reduce and monotone increasing. This guide wheel and impeller have best matching relationship, in it to the spiral type runner and with impeller axially side by side laying fundamentally changed structure and the locus of traditional air deflector, than have export-oriented vortex runner and with impeller traditional air deflector of ring set radially, this guide wheel has the outstanding advantage of efficient and cost two aspects.

The present invention's design is advantageous particularly for raising the efficiency, its reason has three: the first, impeller flow process and water conservancy diversion flow process are real how much series connection, its Process of Confluence and pressurization thereby separate, no matter blade flow field is how, the water conservancy diversion flow process is isolated fully because of series connection, and has a complete constraint, thereby not having any local excitation loss, after this evil was eliminated, remaining only was the loss on the way that can control. The second, the sectional area spreading rate of supercharging runner can independently change and carry out optimization design, and its cross sectional shape also can be optimized, thereby loss on the way can drop to very low level, and its supercharging is most effective to arrive 98%. The 3rd, complete constraint makes liquid flow path direction and flow irrelevant, has best variable working condition adaptability, and its loss on the way is directly proportional with 3 powers of flow, is in the utmost point low-loss state during low discharge. This three large synergistic mechanism, contrast three shortcomings of traditional outer shroud snail road or guide wheel: the pressurization of confluxing how much parallel connection or perforation, non-complete constraints of supercharging runner and spreading rate can not be optimized, increase severely without the loss of variable working condition adaptability low discharge, significantly need not go into the details of its difference.

For the cascade of multistage pump, the present invention program more can embody its superiority, negates that counter the prewhirling of decyclization amount loading increases the unfavorable design of merit, then the potentiality of conservative circular rector design aspect system optimization have just in time been brought into play in the conservative cascade of just prewhirling. This cascade has also increased and significantly reduces water conservancy diversion load and save two advantages of 180 degree commutation links except above-mentioned three advantages. Wherein, the former comprises because conservative output circular rector reduces the deceleration amplitude and eliminated two factors of moderating process, and as previously mentioned, that reduces that the water conservancy diversion load generally has 3 power functions subtracts consumption sensitiveness. The latter refers to keep the peripheral speed overcurrent to save the axial plane component commutation link of 180 degree, its impact is many-sided, except the local resistance loss of saving 2 power function types, main is therefore to save anti-ballistic flow process and cross two benefits of moderating process, this is the key improvement that affects basic procedure planning and topology layout, and space availability ratio is had significant impact. Need to prove that the present invention program's axial plane component commutation process is not existed, but decentralized. Arranging at leisure the relatively very little axis plane velocity increment of a numerical value to vow in the long time of long distance neutralization produces, its spatial variations rate and time rate of change are all very little, thereby do not have racing to geometry and mechanical characteristics, its local resistance loss thereby elimination, this is the Objective benefits of conservative circular rector design just.

Reduce water conservancy diversion load and space expense thereof, do not produce the deceleration phenomenon and realize the pressurization of speed monotone decreasing being the technical factor that the water conservancy diversion flow process is shortened dramatically. Therefore, enter to lead under the speed same, because the minimizing of loss on the way, turn to the elimination of local losses, continuous the slow down multinomial factors such as realization of pressurization, the water conservancy diversion hydraulic loss will reduce significantly. As previously mentioned, the high gesture of the present invention is moving to enter to lead speed than impeller with decrease, and when centripetal guide wheel is combined, the above-mentioned advantage that reduces the wastage will be more outstanding with it, on quantitative relation, will show as 3 power function types and reduce sharply.

This matching component of the present invention and with the combination of centripetal guide wheel, both can be matched in the high potential ratio centrifugal pump, can be applied to again the simple transformation of prior art centrifugal pump, its water conservancy diversion efficient is applicable (2) formula all.

The more obvious advantage of the present invention is: the space expense of air deflector will greatly reduce because of the advantage of this structure. Centripetal guide wheel and blade guiding wheel combining structure thereof are compact, and the aspects such as manufacturing cost and convenient use are remarkably productive reducing. Centripetal guide wheel is a kind of reasonability concept of the space planning according to centrifugal pump especially multistage pump and custom-designed prioritization scheme. Compared to prior art, this scheme has been saved the outer annular space of impeller and the anti-ballistic space in the multilevel hierarchy, and replace that part that only is equivalent to equate with impeller diameter in the anti-ballistic space guide wheel is installed. Therefore, the radial dimension of centripetal guide wheel will equate that with impeller this is so that the diameter design of whole pump only needs to consider take impeller diameter as benchmark that its diversion space utilization rate is about to improve 2 times, be that space requirement will reduce 2/3, the manufacturing cost of pump will reduce undoubtedly greatly. If be used with the high potential ratio impeller, because the water conservancy diversion load is reduced to some/one, its volume will reduce about 50% again.

These superiority of centripetal guide wheel, for will disclosed single-stage pump in the follow-up explanation and the isomorphism concept of multistage pump, and the foundation of the method for modular combination, all have conclusive effect.

The present invention about one of centripetal guide wheel important additional design is: guide wheel runner transfer leg is surrounded by impeller outlet cylinder, impeller cavity antetheca curved surface and outer, the front bottom surface of guide wheel curved surface, its cross section is divided into impeller cavity part and guide wheel part, and two parts assembling kiss engages one. The positional cycle ground in its synthetic cross section shifts to the guide wheel direction, and its sectional area is periodically linear increase with the increase of water conservancy diversion central angle. Its cycle equals a central angle that the water conservancy diversion runner is corresponding, its scaling up coefficient equals the ratio of volumetric displacement design load with the liquid flow export absolute velocity design load of the impeller unit of turning over angle, perhaps also multiply by one greater than 1 the flare factor less than the minimum spreading rate of guide wheel supercharging runner.

The transfer leg runner is accepted impeller outlet liquid stream, belongs to the high speed runner, and its design has material impact for the omnidistance hydraulic efficiency of centrifugal pump, designs bad water hammer microphonics or the cavitation cavitation effect of also may producing, thereby needs comparatively careful design. Its general design principle is: the length of runner and the girth in cross section thereof answer place near the steps to shorten as much as possible, thereby circular cross-section is the most desirable; In the time must using the square-section, its length-width ratio should be as far as possible close to 1, rounded corner in preferably doing; In the time must using other function cross sections, the length that should as far as possible dwindle the friction margin line. Except the general principle of these control friction areas, also must control the rate of change of sectional area, make it to meet the requirement of confluxing, also must control simultaneously the rate of change of limit, cross section coordinate, they are key variables of finishing overcurrent transfering dynamics process. For avoiding miscellaneous narration, about cross sectional shape optimization and marginal coordinate control problem thereof, will in the subsequent embodiment design, be explained by reference to the accompanying drawings.

The target of above-mentioned additional design of the present invention is to satisfy the overcurrent requirement that keeps expeditiously speed or also comprise continuous deceleration supercharging. In theory, utilize the characteristic of incompressible fluid, according to Newton's equation and Bernoulli equation, by the long-pending variation of control cross section of fluid channel, controlling simultaneously area distributions and the shape of two parts in cross section, is to realize that the overcurrent with any mechanical characteristics shifts. The present invention is from the purpose of the mean flow rate of stabilizing solution stream, designed an at the uniform velocity potential barrier process of equipressure or reduction of speed supercharging. Its basic skills is, from minimum sectional area, the continuous modification of the flow section of using foreign currency follows linear increase of area to cause the periodic process method that two chambeies are steadily cut apart after the maximum and construct runner. Realize the transfer of runner and the rationalization control in cross section in cycle at central angle corresponding to each runner, comprise the condition of continuity and the minimized principle of acceleration that satisfy flow velocity, this is based on the thinking of momentum theorem. Wherein, the peripheral speed of Process of Confluence be remain unchanged or respect as far as possible, purpose is to avoid to occur large gradient and distributes and cause the loss of momentum-exchange type in same run-though space, more do not allow to occur local excitation. The limit frictional dissipation is then controlled to reduce by the minimized friction area of margin line length. The realization of described periodic process itself has in fact also comprised the periodicity control to the axial plane component of flow velocity. In above-mentioned design, improve the adaptive characteristic of the efficiency characteristic of runner, anti-cavitation characteristic and variable parameter operation, be outline.

Transfer leg runner scheme of the present invention only is presented as the shape design of a kind of function curved surface at guide wheel bottom surface and impeller cover or position, impeller cavity cover plate outer, does not form independently parts, thereby only is equivalent to a kind of art shapes in manufacture process. When related part adopted mould moulding process to make in batches, it was embodied as originally very low.

The design of the supporting mounting structure of the present invention and centripetal guide wheel is: adopt the vortex street varied angle of confluxing in center to go out to manage symmetrical end cap and make antero posterior axis to encapsulation. This end cap forms by the pressure-bearing cover plate of band assembling seam with division center and the connecting pipe of the integrated manufacturing of cover plate. Its division center comprises the snail road, center of axle sleeve, axle sleeve periphery, bearing bore and the axis hole that snail road building enclosure supports. The pressure-bearing surface of pressure-bearing cover plate is plane or the surface of revolution that coincide with centripetal guide wheel opening surface, and there is an annular opening that is communicated with the snail road at its paraxial position. Snail road, center is a kind of three-dimensional snail road of radially gradually opening axial translation, and its top is the cut water on the annular opening plane, and its end is below the cut water that has increased radial and axial coordinate. Snail road sectional area is directly proportional with central angle, and proportionality coefficient equals the volumetric displacement of the impeller unit of turning over angle and the ratio of liquid stream average speed. Take the open circles plane as benchmark, along with the linearity of sectional area increases, radial coordinate and the axial coordinate of snail road bottom centre line increase gradually, form slope at the bottom of the snail, enter the cut water below after turning over 360 degree, kiss with pipeline subsequently to connect. Snail road cross sectional shape also changes with central angle, from the cut water straightway, at first be the shorten half axial length semiellipse of major axis on plane of the opening, become and sink gradually behind the semicircle and extend along a suitable gradually open arc line of curvature variation that is enough to get around the bearing bore supporting structure, become curvilinear boundary quadrilateral and add semi-circular shape, until enter the cut water below, be deformed into circular section and pipeline kiss with then keeping sectional area and connect. When this symmetry end cap is made bonnet, enter the snail road with the axial incoming flow of circular rector from annular opening, in rotation and translation, conflux in vortex street, do not wait along snail road rotation 0～360 degree, arrive behind the snail road terminal point from what kiss connect and go out the pipe outflow. When making protecgulum, manage cathetus motion liquid stream and accept the snail Dow process and transfer to three-dimensional vortex motion to the power effect. Enter the impeller suction chamber from the shunting of annular opening band circular rector ground at last, motion process is opposite with the bonnet end. Eddying motion in the front and rear covers snail road is low-loss under waterpower standard speed, during assembling front and rear covers is rotated along seam can to change independently of one another into pipe and go out the angle of pipe.

It is a kind of important matching component of the present invention that snail road, center divides the varied angle of confluxing to go out to manage symmetrical end cap. Use centripetal guide wheel and this parts are supporting, the volume of centrifugal pump is greatly reduced, the function that its varied angle goes out pipe can satisfy the user who is difficult to the expect needs of coming personally in application, can save place and pipeline, can reduce elbow and improve pipeline efficient. This design in addition may make centrifugal pump import and export angle minute model be divided into unnecessaryly, obviously, stand in user's angle, this division is inconvenient. This design object of the present invention comprises multiple versatility: in a pump, it is that front and rear covers is general; Between single-stage pump and multistage pump, it also can general exchange. When using in single-stage pump, the global advantage of this encapsulating structure is obvious especially especially. The multiple versatility that the symmetry of end cap is brought, and simplify and import and export the potential advantages that angle is divided model, can simplify the Design and manufacture process of centrifugal pump, thereby reduce manufacturing cost.

This matching component of the present invention and with the combination of centripetal guide wheel, both can be matched in the high potential ratio centrifugal pump, can be applied to again the simple transformation of prior art centrifugal pump. Be applied to normal gesture than and during the high potential ratio centrifugal pump, the coefficient of partial resistance in snail road is very little, thereby its runner can be merged in the water conservancy diversion runner in the lump computed losses, the water conservancy diversion efficient after the merging all is suitable for formula (2). Centripetal guide wheel and transfer leg runner thereof add the kinetic energy loss rate ξ of symmetrical end cap₂To significantly be lower than traditional air deflector. When variable parameter operation, because perseverance tangentially enters to lead and avoids clashing into loss, its loss does not only increase on the contrary and can reduce, thereby can not only not fall the good characteristic that rises on the contrary in the low discharge district by the generation efficiency curve. Again owing to reduce size and make things convenient for the advantage of user installation also to have special competitiveness. Therefore, the combination of centripetal guide wheel and symmetrical end cap also is an independent invention that does not rely on the high potential ratio impeller. When the inventive features such as this technology and high potential ratio impeller, inner antifriction are used in combination, every advantageous characteristic will be brought out the best in each other.

When centripetal guide wheel and symmetrical end cap were used for transforming the prior art centrifugal pump, its centripetal supercharging, varied angle went out function and the performances such as pipe and volume significantly reduce, and are a kind of outstanding substantive distinguishing features, can produce significant progress. For example, according to preresearch estimates, only reduce air deflector volume and front and rear cover and bearing block thereof and go out pipe integrated and symmetrical general two, the manufacturing cost of centrifugal pump is reduced more than 30%, the user can also obtain the benefit of the aspects such as place saving, pipeline saving, efficient raising. Obviously, this design has many-sided technology economy advantage.

Based on the characteristics and advantages of centripetal guide wheel, symmetrical end cap, the present invention has designed a kind of method of modular combination centrifugal pump according to this, can be combined into the novel centrifugal pump of many kinds according to the method.

The present invention also particularly comprises a kind of method of constructing centrifugal pump by modular combination. This method not only is used for constructing multistage pump, also is used for constructing single-stage pump, not only is used for implementing a kind of technology, also is used for combination to implement multiple technologies.

Based on the centripetal supercharging principle of centripetal guide wheel, the guide wheel flow process as axially arranged side by side with it with the inverse process of impeller speed field and kinetic energy distribution thereof, can be formed the simplest and the most direct flow spaces periodically. According to this periodically, just can set up the concept of space of the compactest modular construction, wherein the connection mode of implicit " liquid stream flows into and outflow from paraxial annular mouth band circular rector ". Entering out from paraxial annular mouth is necessary design, why requires to be with circular rector, is for the minimized mechanics of the omnidistance change in flow rate of centrifugal pump is considered requirement. It is this that to minimize benefit a lot, comprise the utilization of the alleviating of improvement, water conservancy diversion load, inlet/outlet kinetic energy of variable parameter operation adaptability and inlet/outlet cavitation characteristic and most critical behind impeller outlet, efficiently enter to lead etc. This all belongs to the boundary condition optimization problem of impeller channel, and as seen, conservative circular rector is the key problem that boundary condition is optimized.

From above stated specification as can be known, the paraxial annular opening of symmetrical end cap and three-dimensional snail road are that conservative circular rector designs, and have and bring up the ability that remedies required boundary condition, can adapt to above-mentioned connection mode. Therefore, take this principle, this periodicity, this modular concept and this connection mode as the basis, just can design the method that a kind of impeller for having any technical characteristic can carry out modular combination. The method requires outer shape and the dimensional standard of impeller, take the outside shape and size of standardized impeller as benchmark, launches the axial space of centrifugal pump, just can design the modularization assemble structure of axial connection. This structure comprises the entire infrastructure spare of a hydraulic flow state in the cycle, in fact is exactly the axial combination of impeller and guide wheel and annex thereof. Their structure and function thereof have the periodicity of geometry and kinematics and dynamic characteristic, and the potential function in its flow field---static pressure then adds up on the way and transmits under law of connected vessels, and not having does not need this periodicity yet. The modular combination method of design and progression are irrelevant like this, thereby are pervasive new design method in single-stage pump and multistage pump certainly.

The accurate description of modular technology combined method and combination product thereof is: based on the structure and characteristics of centripetal guide wheel, with its flow process as axially arranged side by side with the inverse process of impeller flow process kinetic energy distribution, form simple and direct space periodicity, the axial centripetal supercharging of the combination module of energizing of the paraxial mouthful blade guiding wheel that connects of structural belt circular rector according to this, be called for short centripetal supercharging module, and with its standardization. Based on the structure and characteristics of symmetrical end cap, with it as the border, flow field that connects with the paraxial annular mouth of circular rector and end seal structure module and with its standardization. Standardization produces two specification series that comprise the cuckoo lattice in correspondence with each other, wherein the module assembly size of same father specification is identical with basic interface parameter (for example flow, rotating speed) and have the check of tabling look-up interchangeability, same cuckoo lattice module assembly size and total interface parameter under father's specification (comprise the parameter under the functional meaning, withstand voltage 2MPa for example, resistant material is made etc.) identical and have absolute interchangeability, two kinds of interchangeability are defined in single-stage pump, multistage pump, various model and the different technology that include and comprise in use high potential ratio or the normal big collection of gesture than the centrifugal pump of impeller, definition interchangeability territory in planning and design process, interchangeability is set up in the domain of definition in the production process after design and in the use procedure after production. Connection mode according to " liquid stream flows into and outflow from paraxial annular mouth band circular rector ", (Traditional Multistage Pump generally is no more than 20 grades with 1 or maximum 64 series connection, progression of the present invention can increase, but generally be no more than 64 grades) a plurality of centripetal supercharging module and 2 symmetrical end cap module combinations, i.e. composition module combination single-stage pump or multistage pump. Centripetal supercharging module is without shell person adapted middle open type shell, and band shell person is level segmentation structure.

In the prior art, except the minorities such as bearing, shaft seal, securing member are striden the complementary part of model use, do not have dissimilar centrifugal pumps to use the planning of identical main functional modules, do not comprise different technologies yet and have the main functional modules of different performance in the design of the combination of same centrifugal pump and replacement. As is generally known, each single-stage pump of prior art all is the selected hydraulic model individual design of basis, impeller and the air deflector of different hydraulic models do not have interchangeability, and the impeller that hydraulic model is identical is of different sizes because of the different of model specification with air deflector, does not also have interchangeability. The level segmentation multistage pump of prior art uses identical energize parts or assembly usually, can assemble the different lift centrifugal pumps of same flow gauge lattice with them, but the model that uses and technology be fix with unalterable, and its supporting building enclosure and shaft components remain independent design. Because the existence of these problems, the product type that causes centrifugal pump is very complicated, and the new technology spread of centrifugal pump is also delayed under the obstruct of numerous standard barriers.

The present invention adopts the conventional method of the identical parts assembling of energizing to be extended for the modular combination method multistage pump, make between single-stage pump and multistage pump, in the design of going along with sb. to guard him with supporting structure, and then in the combination Algebra Domain of different technologies, can both adopt widely the modular assembly with advantage, after specializing, new design method has just formed. In the core concept of this method of design, performance combination and modular process efficiency are the part of purpose with breaking the standard barrier that new technology faces, and taking this opportunity to incorporate the design cost performance that mathematic programming methods promotes centrifugal pump then is another more urgent idea. Why more urgent, be only to be applied to local method because modular combination method and structural design thereof also may be one. If according to the method Selecting All Parameters constructing module optionally, will cause the mixed and disorderly space hold on flow-pressure plane, this is unfavorable or do not have a large help to the systemic resource optimization of industry and cost. Want to benefit from the overall situation, should change on flow-pressure plane and directly plan the traditional method that the type spectrum of centrifugal pump product covers according to the social demand survey data, change and the structural design of modular combination is taken into account, the type spectrum that this can simplify centrifugal pump greatly systematically reduces the average production cost of pump industry. The foundation that the parameter of modular combination is selected then should derive from the standard through optimization planning.

The present invention is with a kind of low-cost toy building set of centripetal supercharging module as centrifugal pump, set up according to this multistage assembly unit standard of centrifugal pump, and in this standard, also especially single-stage pump also is included in wherein, so that the Design and manufacture of the single-stage pump of wasting consuming time no longer necessitates, this is the most original idea. But the inventor has produced new technology deduction at the performance equation of research multistage pump and with itself and high potential ratio technology when comparing. As is generally known, centrifugal pump is made multistage being conducive to and is raised the efficiency, because, for same lift demand, level lift and the progression of multistage pump are inversely proportional to, its impeller diameter is inversely proportional to the square root that enters to lead speed and progression under the same rotational speed, thereby 2 power type water conservancy diversion loss of pump also will be inversely proportional to progression. Relation between the technical characteristic of high potential ratio impeller more of the present invention and the multistage pump characteristic, from concerning the impact of hydraulic loss, the design parameter of high potential ratio impeller---feedback speed reducing ratio provides linear subtraction function relation, this level parameter adjusting direction with multistage pump is identical, thereby both can be regarded as the adjusting parameter of by stages equivalence, its difference be the latter be disperse and the application space larger, and the former is continuous but the application space is limited. This equivalence has disclosed another important channel of improving efficiency of centrifugal pump, and its difference has been showed the good prospect of two large approach complementary combinations.

The present invention advocates two kinds of high effective way combinations, and specifically is incorporated in the type spectrum planning of considering the modular combination method, and this can produce huge economic and social benefit. This combination, being actually the type of centrifugal pump on flow-lift plane is the combination of rule translation staged module planning, thereby problem is converted into the planning of grade module on flow-lift plane. The present invention has designed the method for the level module parameter being carried out Mathematical Planning.

This mathematic programming methods is: with the sum of series specific revolution as planning take flow and lift as the binary function of independent argument, with the feedback speed reducing ratio as on the efficient contour surface, also participating in planning with the continuous adjustable independent variable of level function by stages equivalence, form three meta-planning group of functions ((progression of equal value between the first two Meta Partition, the feedback speed reducing ratio), specific revolution). Produce with the operating cost function of the factors such as efficient structure and the manufacturing cost function of constructing with factors such as structure, size, material, techniques by social investigation, with both comparable unit function value addition as object function, perhaps also increase the constraint of the additional inequality groups such as product aesthetic designing requirement, adopt Classical mathematical programming method or numerical algorithm to obtain to make object function get the optimization codomain of three meta-planning group of functions of minimum of a value, set up according to this hydraulic model and level series of modules standard. During design, take lift and flow as argument, determine progression, specific revolution and feedback speed reducing ratio according to standard, can determine the centrifugal pump stage module parameter of optimizing. When the level module adopted the backward inclined type of impeller of prior art, its feedback speed reducing ratio was defined as the ratio of circumferential components with the wheel speed along the line of outlet relative velocity, and it is worth close to 0, can ignore.

In said method, because the by stages equivalence of sum of series feedback speed reducing ratio on efficiency-adjusted, thereby provide a kind of at the efficient curved surface such as same and can exchange complementary continuing relation, the optimization codomain after level function and the specific revolution planning will so and rarefaction. This method is that new space of thinking has been opened up in type spectrum planning and the product design of centrifugal pump, and is all significant in theory research and PRACTICE OF DESIGN. The type sets of the sum of series specific revolution of this method planning is minimum, and not only efficient is high for the centrifugal pump of design according to this, and space availability ratio is high, size is little, economize with material, thereby has the dual value advantage of efficient and cost. In theory, its technical-economic index will be the highest.

It needs to be noted that the efficiency of pump and pump cost also are not last evaluation indexes, last index should be the corresponding index of unit, and actual point should be the corresponding index of actual liquid fluid system again. Have the mesh topology relation from the pump index to last application index, must use matrix operation to analyze. For example, standing in the angle of manufacturer, is motor-centrifugal pump group such as its product, then as a raising of taking advantage of the efficiency of pump of sex factor, obviously is proportionally to have improved unit efficiency. But this is not unique result, because also have another design functional that the interests of producer are exerted an influence, that is exactly the relation of the efficiency of pump-power of motor-motor cost-unit cost. Therefore, the unit cost that is made of pump cost, motor cost, the two connection cost sum will be subjected to the double influence of the efficiency of pump and two indexs of pump cost simultaneously. Consider the proportion of motor cost in the centrifugal pump group cost, it is not little to the amplitude of unit cost impact to increase substantially the efficiency of pump. This shows that in technological economics evaluation, the pump index is ancestor's vector, in the coefficient matrix of finding the solution the target index relevant with the real economy interests, exists and should take into account the impact of the cross action factor. For the end user, this impact will concern in its TCO from buying spending and two aspects of operating cost. For production firm, the design that obtains simultaneously performance raising and two benefits of cost will improve the cost performance of its product undoubtedly and increase its market competitiveness. In view of this consideration, should transform the object function in the above-mentioned planing method, with the method revision be: statistics obtains an incidence matrix function by inquiry, the efficiency of pump is become unit efficiency and unit cost with the pump cost-exchange, construct according to this operating cost and the manufacturing cost of unit, both comparable unit function value additions are planned to optimize module parameter and product design as object function.

The present invention pushes away the thought of haunt and plague multilevel hierarchy and modular combination and has considered a technique prerequisite, and that is exactly the new technology that accurate mold forming technology and other Modern Manufacturing Technology provide, such as powder metallurgy, pressure hot investment casting, compression moulding and injection moulding etc. These techniques can in the space complexity that increases structure, can also increase substantially production efficiency and reduce production costs than traditional handicraft. For example, level segmentation leaf leads half-opened impeller in the composite module, double shrouded wheel lid, with parts such as the guide wheel of shell and impeller cavity, impeller cavity lids, all be open type or semi-open type workpiece, have the process advantage that can adopt generally two matched moulds moulding, thereby can adopt above-mentioned new technology manufacturing. Characteristic Design on the serial hydrodynamics of the present invention may increase complexity and the die cost of mould, but basically is unlikely the increase processing cost. Consider that the contributory value of die cost is in fact very low when producing in enormous quantities, thereby adopt new technology and implement not inventor's hope still of series technique of the present invention, and be a kind of implicit basic assumption. If the employing traditional handicraft, designs more of the present invention will be difficult to carry out or cost raises on the contrary. This can not affect practicality of the present invention, the efficient centrifugal pump product because social active demand is cheap, and design of the present invention and suitable advanced technique combine, and just can satisfy this demand.

Adopt modular combination method of the present invention, aforementioned various product inventive features can be combined in the module, can also be with inventive features and the prior art combination of wherein some products, this will form the newtype of many kinds of centrifugal pumps. Only use the modular combination method that the product design of prior art is transformed, also can produce multiple good effect. About the detailed design of these combinations and the narration of combined effect, and the application mode of combined method, will comprise or be embodied in the embodiment explanation by reference to the accompanying drawings.

Below in conjunction with accompanying drawing centrifugal pump of the present invention and technical combinations method thereof and example are described in further detail.

Fig. 1 is a kind of semi-open type high potential ratio blade wheel structure schematic diagram.

Fig. 2 is a kind of enclosed high potential ratio blade wheel structure schematic diagram.

Fig. 3 is a kind of sawtoothed wheel disc semi-open type high potential ratio blade wheel structure schematic diagram.

Fig. 4 is a kind of sawtoothed wheel disc enclosed high potential ratio blade wheel structure schematic diagram.

Fig. 5 is a kind of prerotator structural representation that axially becomes a mandarin.

Fig. 6 is a kind of prerotator structural representation that radially becomes a mandarin.

Fig. 7 is a kind of semi-open type high potential ratio blade wheel structure schematic diagram with prerotator.

Fig. 8 is a kind of semi-open type high potential ratio blade wheel structure schematic diagram with the average rate turnout.

Fig. 9 is a kind of semi-open type high potential ratio blade wheel structure schematic diagram with average rate turnout and prerotator.

Figure 10 is a kind of high potential ratio cantilever pump structural representation with average rate turnout and prerotator.

Figure 11 a kind ofly goes out the axle head inner antifriction and drives two-phase flow cooling shaft seal flow passage structure schematic diagram.

Figure 12 is that a kind of front end chamber inner antifriction drives two-phase flow V-shaped groove choke interstitial structure schematic diagram.

Figure 13 is a kind of half-opened impeller cantilever pump inflation drive unit and connection diagram thereof.

Figure 14 is a kind of double shrouded wheel cantilever pump inflation drive unit and connection diagram thereof.

Figure 15 is a kind of centripetal Guiding wheel structure schematic diagram.

Figure 16 is the transfer leg flow passage structure schematic diagram of a kind of high potential ratio impeller cavity and centripetal guide wheel combination.

Figure 17 is the structural representation of the super antifriction of a kind of double shrouded wheel and guide wheel controls metastasis section runner.

Figure 18 is that snail road, a kind of center divides the varied angle of confluxing to go out to manage symmetrical end cover structure schematic diagram.

Figure 19 is the level segmentation modular structure schematic diagram of a kind of half-opened impeller and centripetal guide wheel combination.

Figure 20 is the level segmentation modular structure schematic diagram of a kind of double shrouded wheel and centripetal guide wheel combination.

Figure 21 is the level segmentation modular structure schematic diagram of a kind of antifriction double shrouded wheel and centripetal guide wheel combination.

Figure 22 is the level segmentation modular structure schematic diagram of a kind of semi-open type high potential ratio impeller and centripetal guide wheel combination.

Figure 23 is the level segmentation modular structure schematic diagram of a kind of enclosed high potential ratio impeller and centripetal guide wheel combination.

Figure 24 is the level segmentation modular structure schematic diagram of a kind of pre-rotative closing type high potential ratio impeller and centripetal guide wheel combination.

Figure 25 is the level segmentation modular structure schematic diagram of a kind of antifriction enclosed high potential ratio impeller and centripetal guide wheel combination.

Figure 26 is the level segmentation modular structure schematic diagram of a kind of antifriction pre-rotative closing type high potential ratio impeller and centripetal guide wheel combination.

Figure 27 is the level segmentation modular structure schematic diagram of a kind of super antifriction pre-rotative closing type high potential ratio impeller and centripetal guide wheel combination.

Figure 28 is that a kind of symmetrical lid angle goes out to manage semi-open type and takes turns centripetal boosting centrifugal pump structural representation.

Figure 29 is that a kind of symmetrical lid angle goes out to manage the centripetal boosting centrifugal pump structural representation of hooded impeller.

Figure 30 is that a kind of symmetrical lid angle goes out to manage the centripetal boosting centrifugal pump structural representation of antifriction hooded impeller.

Figure 31 is that a kind of symmetrical lid angle goes out to manage the high potential ratio semi-open type and takes turns centripetal boosting centrifugal pump structural representation.

Figure 32 is that a kind of symmetrical lid angle goes out to manage the centripetal boosting centrifugal pump structural representation of high potential ratio hooded impeller.

Figure 33 is that a kind of symmetrical lid angle goes out the pipe centripetal boosting centrifugal pump structural representation of high potential ratio hooded impeller of prewhirling.

Figure 34 is that a kind of symmetrical lid angle goes out to manage the centripetal boosting centrifugal pump structural representation of antifriction high potential ratio hooded impeller.

Figure 35 is that a kind of symmetrical lid angle goes out to manage the antifriction centripetal boosting centrifugal pump structural representation of high potential ratio hooded impeller of prewhirling.

Figure 36 is that a kind of symmetrical lid angle goes out the super antifriction of the pipe centripetal boosting centrifugal pump structural representation of high potential ratio hooded impeller of prewhirling.

Figure 37 is that a kind of symmetrical lid angle goes out to manage semi-open type and takes turns centripetal supercharging centrifugal multistage pump multiple centrifugal pump structural representation.

Figure 38 is that a kind of symmetrical lid angle goes out to manage the centripetal supercharging centrifugal multistage pump multiple centrifugal pump of hooded impeller structural representation.

Figure 39 is that a kind of symmetrical lid angle goes out to manage the centripetal supercharging centrifugal multistage pump multiple centrifugal pump of antifriction hooded impeller structural representation.

Figure 40 is that a kind of symmetrical lid angle goes out to manage the high potential ratio semi-open type and takes turns centripetal supercharging centrifugal multistage pump multiple centrifugal pump structural representation.

Figure 41 is that a kind of symmetrical lid angle goes out to manage the centripetal supercharging centrifugal multistage pump multiple centrifugal pump of high potential ratio hooded impeller structural representation.

Figure 42 is that a kind of symmetrical lid angle goes out the pipe centripetal supercharging centrifugal multistage pump multiple centrifugal pump of the high potential ratio hooded impeller structural representation of prewhirling.

Figure 43 is that a kind of symmetrical lid angle goes out to manage the centripetal supercharging centrifugal multistage pump multiple centrifugal pump of antifriction high potential ratio hooded impeller structural representation.

Figure 44 is that a kind of symmetrical lid angle goes out to manage the antifriction centripetal supercharging centrifugal multistage pump multiple centrifugal pump of the high potential ratio hooded impeller structural representation of prewhirling.

Figure 45 is that a kind of symmetrical lid angle goes out the super antifriction of the pipe centripetal supercharging centrifugal multistage pump multiple centrifugal pump of the high potential ratio hooded impeller structural representation of prewhirling.

Figure 46 is that a kind of symmetrical lid angle goes out the pipe centripetal supercharging centrifugal multistage pump multiple centrifugal pump of the high potential ratio semi-open type blade guiding wheel structural representation of prewhirling.

Fig. 1, Fig. 2, Fig. 3, Fig. 4 represent respectively 4 kinds of main Types and the structure thereof of high potential ratio impeller.

With reference to Fig. 1, provided the moving a kind of structure than impeller of the high gesture of semi-open type among the figure. Wherein, the 1st, hub disk, the 2nd, impeller shaft hole, the 3rd, impeller sleeve, the 4th, suction chamber, the 5th, blade, the 6th, middle part, leaf concentrated flow road, the 7th, runner entrance, the 8th, runner exit.

Semi-open type high potential ratio impeller is a disk-shaped part, adopts the integrated manufacturing of mould moulding process. There are axis hole 2 and axle sleeve 3 in its center, is used for and rotating shaft assembling (keyway can be set). Axle sleeve outside is annular suction chamber 4, its bottom surface or the surface of revolution that liquid stream is turned to continuously, when or when packing prerotator into, this curved surface will be replaced by the identical prerotator wheel rim surface of appearance. Blade 5 is L shaped, and front middle part is radially tendency, and afterbody is towards the traditional method of indicating the pronunciation of a Chinese character to bending, and the afterbody outside is smooth gradually open arc terminal face or groove face. 6～12 identical L shaped blades evenly distribute on wheel disc, form uniform leaf concentrated flow road between blade. Entrance 7 and the middle part 6 of this runner are comparatively broad, sectional area reduces gradually and turns to before arriving outlet 8, and fluid is accelerated and changes direction, flows out impeller with larger relative velocity and the very little angle of outlet at last, liquid flow export absolute velocity thereby significantly reduce, gesture is moving than significantly improving. Behind the liquid flow export, be subject to the constraint of inboard cylinder or groove face wall attachment effect, form aduncate uniform streamline at the outlet spacer region, have uniform radial component and tangential component, its ratio does not change with central angle. This is equivalent to the effect of continuous opening, but does not reflux fully.

The discharge area of each runner of impeller is directly proportional with design discharge, is inversely proportional to design outlet relative velocity and the number of blade, and the design relative velocity equals the product of peripheral speed with the feedback speed reducing ratio parameter K at impeller outlet place. Design parameter and the measured value anastomose property determined in this way are good, do not disturb because wherein reflux.

Determine parameter K according to aforementioned discussion, centrifugal pump will have good control characteristic, efficiency characteristic and anti-cavitation characteristic.

With reference to Fig. 2, provided a kind of structure of enclosed high potential ratio impeller among the figure. Wherein 9 is rivets of securing cover plate, the 10th, and the impeller protecgulum. Install protecgulum 10 additional on the basis of semi-open type high potential ratio impeller with the impeller sealing, just consist of enclosed high potential ratio impeller. Enclosed high potential ratio impeller channel flexibility is large, and the exit is narrow, is difficult to traditional casting technique manufacturing, adopts the process of half-opened impeller chassis riveted joint protecgulum simple. The method requirement is opened 2～3 rivet holes at the broad place of the ancon of every L shaped blade, with countersunk head or thin flat head rivet 9 front shroud and semi-open type wheel disc part is riveted. Front shroud adopts the die press technology for forming manufacturing, has and the leakproof fit inner surface of semi-open type wheel disc and the surface of revolution outer surface that meets required precision. Be to ensure dynamic balancing, the rivet hole that is in same relative position should be on a concentric circles, and is in the blade midline position. Can change rivet hole into screw, with the fastening front shroud of backing-up screw. Also can adopt spot-welding technology to connect front shroud. The technical characterictic on the semi-open type chassis of double shrouded wheel is identical with half-opened impeller with designing requirement, and both operating characteristics are also basic identical. The superiority of double shrouded wheel is that its leaf concentrated flow road does not have the friction concerning foreign affairs of open surface and turbulent flow to disturb, thereby more near theoretical characteristics. And double shrouded wheel is packed into behind the impeller cavity, can form two to the end chambeies of impeller channel sealing, adopt both-end chamber inner antifriction technology after, the overwhelming majority of its disk friction will be eliminated, and have very high interior mechanical efficiency.

With reference to Fig. 3, provided a kind of structure of sawtoothed wheel disc semi-open type high potential ratio impeller among the figure. The 11st, the tooth of wheel disc is along outline line. Part outside the blade of the circular wheel disc of semi-open type high potential ratio impeller is removed, and wheel disc namely becomes zigzag. Figure middle conductor 11 is tooth profile line segments that a blade tail point arrives a rear blade outer, is the straight line on the outlet normal plane. The chassis at this line segment place is thinned, and forms sharp-pointed crown, to produce rectification effect. In order to keep the intensity of crown and blade tail point, this impeller needs the Materials with High Strength manufacturing.

Sawtoothed wheel disc high potential ratio impeller has higher efficient. In the ordinary course of things, the outer axial constraint function of impeller outlet is substituted by impeller cavity, the curved line trangle fritter at wheel disc edge becomes the superfluous thing of empty increase and lose consumption because of the two sides friction, its outside is with the velocity of following and end chamber dielectric friction, consume impeller and compare merit, its inboard consumes the liquid flowing ratio energy with outlet relative velocity and the friction of liquid stream. After removing these fritters, only there is the friction of liquid stream and chamber wall in the relevant position, only consumes the liquid flowing ratio energy, and the absolute velocity of liquid stream is also less than the velocity of following, and this obviously can raise the efficiency.

The height analysis that sawtoothed wheel disc is raised the efficiency is as follows: according to speed triangle, the friction velocity of removing behind the little corner block is one bar minor face, and the speed of original two sides friction is velocity of following length limit and relative velocity minor face, and the loss of generation is both loss sums. Consider that loss is directly proportional with velocity squared, and K ≈ 0.5 and β₂The condition of ≈ 0, then the loss reduction rate on the unit are is ((1²+0.5 ²)-(1-0.5) ²)/(1 ²+0.5 ²)=80%. The product of frictional force, circumferential length and radius on the differential of considering again loss moment and the unit are is directly proportional, and be 5 functional relations of radius behind the integration, thereby energy-conservation benefit should be considerable. For instance, the radial width that sets out mouth is 10% of radius, and the reduction of the frictional dissipation on these fritter areas that then cut with respect to the reduction ratio of wheel back-end disk chamber frictional dissipation is

$0.8{\&Integral;}_{09}^1{\mathrm{<figure-callout\; id="3"\; label="r"\; filenames="A20031011702800841.png"\; state="\{\{state\}\}">r</figure-callout>}}^{3}2\mathrm{\&pi;}(10r-9)\mathrm{dr})/{\&Integral;}_0^1{\mathrm{<figure-callout\; id="3"\; label="r"\; filenames="A20031011702800841.png"\; state="\{\{state\}\}">r</figure-callout>}}^{3}2\mathrm{\&pi;rdr}=0.8(0.8190-0.7738)/0.2=18.1\%$

Establish again the disk friction of chamber, rear end and approximately make the efficiency of pump descend 3～5%, then the efficiency of pump approximately improves 0.5～1%.

The design object of sawtoothed wheel disc is the wheel disc antifriction, can not produce above-mentioned benefit when having the inner antifriction device. Because the effect of inner antifriction device is more remarkable, when this device is housed, should not design the impeller of this wheel disc because it can make inflated diameter disturb than reducing the work of this device, gained will not repay lose.

With reference to Fig. 4, provided a kind of structure of sawtoothed wheel disc enclosed high potential ratio impeller among the figure. Part outside the blade of the circular wheel disc of the semi-open type of enclosed high potential ratio impeller and cover plate thereof is removed, and the whole leaf universe namely becomes zigzag. Figure middle conductor 12 is tooth profile line segments that a blade tail point arrives a rear blade outer, is the straight line on the outlet normal plane. Its tooth is identical with half-opened impeller shown in Figure 3 along sharpening rectification and corresponding requirement of strength.

The antifriction function of sawtoothed wheel disc enclosed high potential ratio impeller is two-sided, recently analyzes according to the opening bore of above-mentioned example, and the frictional dissipation of its rear trochal disc and protecgulum all can reduce by 18.1%, the efficiency of pump thereby approximately can improve 1～2%. Based on same reason, this impeller only limits to use in the centrifugal pump that does not have the inner antifriction device.

With reference to Fig. 5, provided a kind of structure of the prerotator that axially becomes a mandarin among the figure. Wherein, the 13rd, impeller suction chamber limit, the 14th, lower wheel rim, the 15th, upper wheel rim, the 16th, elasticity sail formula blade, the 17th, the axis plane projection of lower wheel rim, the 18th, approach the lower wheel rim round point of going to the bottom on the blade, the 19th, approach the upper wheel rim round point of going to the bottom, the 20th, the rigidity rib.

The prerotator that axially becomes a mandarin is assembled by two joint wheel rims and some elasticity sail formula blades. Wheel rim 14 and 15 slides on the impeller sleeve, independent rotation separately, and its surface mutually kiss is connected into the surface of revolution that liquid stream is turned to continuously. The sheet number of sail formula blade be less than the impeller blade number or or its approximate number, with unlikely too low and friction area is advisable too greatly than unlikely to the constraint degree of runner. 16 one-tenth curved line trangles of sail formula blade, its straight line forward position hangs on the rigidity rib 20, and rib radially is fixed on the porch of impeller blade or protecgulum. On the curved side of sail formula blade with two joint wheel rims under 2: 18 and 19 being separately fixed on this two circumference of approaching of bottom surface circle, form the pulling force application point relative with the rigidity rib.

Blade tail tip 18 has certain bending strength, makes it have directive property in the time of fixedly, substantially to keep the consistent of prerotator runner exit direction and impeller channel Way in. During work, impeller affects blade to rotate with wheel rim by the rigidity rib, elasticity sail formula blade is deformed into propeller shape adaptively, and whole process keeps the state tangent with streamline from the inlet to the outlet, and this is blade tensile stress, flexure stress and liquid stream reaction force and the self balancing result of centrifugal force. In steady-state operation, the order of elasticity sail formula blade will be deformed into space curve by curved side and free straight line, and whole blade and margin line thereof will keep static with respect to wheel rim and impeller in abutting connection with the position. In all kinds of dynamic processes such as power condition changing, blade is the stress of adaptively changing shape and each several part, with on every side relative position also with change, balance each other with the change with liquid stream inertia dynamical reaction, keep after the balance and the tangent state of streamline, two wheel rims are adjusted angle separately thereupon. Here do not have the requirement of quality of fit, because little slit does not affect the whole structure to the effect of liquid stream, and the mobile drag that little extruding produces also can obtain discharging because of random perturbation, dynamically adjusts thereby always can accurately finish.

The prerotator that axially becomes a mandarin is installed in the suction chamber of the centrifugal pump that axially becomes a mandarin, and the suction chamber of impeller thereby must to open the appearance of an annulus cylindricality empty is in order to pack prerotator into. Holding empty center is impeller sleeve, and its outer surface is the face of cylinder or the step face of cylinder, is used for the wheel rim of sliding sleeve prerotator. The surface of revolution of wheel rim will replace the surface of revolution at impeller center to play the steering diversion effect. The load of prerotator is very little, and the intensity of sail formula blade is not had too high requirement.

The effect of prerotator elasticity sail formula blade self adaptation distortion is: liquid stream always enters with blade tangently, and changes continuously velocity magnitude and direction along journey under the effect of blade normal force, and at the port of export, its velocity attitude always faces impeller eye. Therefore, impeller eye and prerotator entrance all can not clash into turbulent flow, and the impeller eye area also can obtain the most effective utilization. When flow changed, these property preservations were constant.

With reference to Fig. 6, provided a kind of structure of the prerotator that radially becomes a mandarin among the figure. Wherein, the 21st, lower wheel rim, the 22nd, upper wheel rim, the 23rd, rigidity rib, the 24th, elasticity sail formula blade, the 25th, rib support and axle sleeve, the 26th, the axis plane projection of lower wheel rim, the 27th, the point of wheel rim upper bottom surface under approaching on the blade, the 28th, the axis plane projection of rigidity rib, the 29th, approach the upward point of wheel rim upper bottom surface on the blade, the 30th, the axis plane projection of upper wheel rim.

The prerotator that radially becomes a mandarin is assembled by disc rib support 25, lower wheel rim 21, upper wheel rim 22 and some rigidity ribs 23 and some curved line trangle elasticity sail formula blades 24 with axle sleeve. The deformation operation principle definite, blade of its number of blade is all identical with the prerotator that axially becomes a mandarin. Institute's difference mainly contains 3 points: the first, and liquid stream axially flows out from face of cylinder entrance radial inflow with from the plane annular outlet, and the straight line that the curved line trangle blade is parallel to rotating shaft is the entrance limit, and this side suspension is on the rigidity rib. The second, the contiguous point 27,29 of the upper bottom surface circle of the curved side of elasticity sail formula blade and two joint wheel rims is fixed on two wheel rims, and wheel rim provides the balance pulling force by these 2. The 3rd, wheel rim 21,22 slides on the rack sleeve, and the aperture of its centre bore is little than the impeller sleeve external diameter.

Among the figure, elasticity sail formula blade 24 is suspended on the rigidity rib 28, and rib then directly is fixed on the disc holder 25 with axle sleeve, and its axle sleeve stationary fit is in rotating shaft, for disc holder and rigidity rib provide driving force. This structure has the advantage of part integrity and assembling independence, and when assembling its axle sleeve be axial compression with impeller sleeve, the integral shaft of machine is good to positioning performance, the sealing of rotating shaft and rigidity are also so and improve.

During running, disc holder 25 and rigidity rib 28 and rotating shaft synchronous rotary. When the circumferential components of the flow stream velocity that enters prerotator was inadequate, sail formula blade was outstanding to posttension as shown in FIG., and its inlet angle changes with streamline adaptively, makes blade inlet and streamline tangent. The Normal Constraint power of blade provides circumferential acceleration and to the component of cadion-acceleration, liquid is flow to into the synchronous rotary state for liquid stream on periphery, and provides and offset or the anti-radial drive of partial offset centrifugal force, and prerotator output shaft work increases the liquid flowing ratio energy. The increase of liquid stream axial velocity component then is the power-actuated result of surface of revolution reaction, does not have in theory the function conversion. Liquid flows to after certain radial coordinate position, its circumferential speed component will be continuously greater than synchronizing speed, at this moment, liquid stream will be exported specific energy blade will be done work, its active force helps the tangential component of the tension of balance blade front portion, make its root keep the state vertical with rotating shaft, thereby keep larger cross section of fluid channel to amass. The position of blade curved side tension balanced point 27,29 is selected to be conducive to make when load is maximum between two joint wheel rims and the impeller and they maximum angular displacement occur each other, the needs that strengthen to satisfy stress.

When the tangential component of the flow stream velocity that enters prerotator surpasses the velocity of following, sail formula blade 24 will ask that toe-out is outstanding, and bending direction to that indicated in the drawings is opposite, and liquid stream output specific energy is done work to blade, and prerotator enters hydraulic turbine duty. At this moment mechanical analysis is that similarly difference is the opposite direction of the circumferential components of normal force and stress. In dynamic process, strain occurs in blade adaptively, and two joint wheel rims relatively move. This adjustment campaign also can be finished rapidly under little mechanical friction hinders, because always existence of small disturbance and vibration, be enough to help overcome friction.

The prerotator that radially becomes a mandarin mainly is installed in the center of the centripetal guide wheel of semi-open type, closely links to each other with the suction chamber of next stage impeller. In fact, the combination of centripetal guide wheel and prerotator has embodied this design so that rear one-level impeller not needs suction chamber among the multistage pump embodiment of the present invention.

With reference to Fig. 7, an example using as prerotator has provided a kind of semi-open type high potential ratio blade wheel structure with prerotator among the figure, as a kind of embodiment of prerotator and the high potential ratio impeller combination that will axially become a mandarin. Wherein, the 31st, semi-open type high potential ratio impeller, the 32nd, the lower wheel rim of prerotator, the 33rd, the sail formula blade of prerotator, the 34th, the rigidity rib of prerotator, the 35th, the upper wheel rim of prerotator.

As shown in the figure, prerotator is contained in the suction chamber of high potential ratio impeller 31. Suction chamber be beyond the impeller middle spindle cover and root of blade with an interior annulus cylindricality cavity volume. Two joint wheel rims 32 and 35 sliding sleeves (movingly) of prerotator on impeller sleeve, on the alternate inlet face that radially is fastened on 4 root in 8 impeller blades of 4 rigidity ribs, are namely finished assembling. The number of blade 4 of prerotator is the approximate number of impeller blade several 8 among the figure.

The high potential ratio impeller that prerotator is housed can be used for single-stage pump, also can be used for multistage pump, is assembled in the centrifugal pump as a whole. Prerotator is the matching component of impeller channel 90 degree inlet angle designs of the present invention, its self adaptation mechanism of prewhirling can play a significant role for the inlet water force characteristic that improves pump and anti-cavitation characteristic, especially when pump off-design operating mode was moved, its adaptation mechanism was for the meaning that has particular importance service life of the operational efficiency that improves pump and prolongation pump.

With reference to Fig. 8, as the relative vortex of containment with improve the embodiment of average rate turnout technology of the operation characteristic of impeller comprehensively, provided the schematic construction with the high potential ratio impeller on average rate turnout among the figure. Wherein, the 36th, L shaped blade, the 37th, average rate comb leaf, the 38th, nearly pressure face turnout, the 39th, nearly suction surface turnout, the 40th, turnout outlet, the 41st, turnout entrance, the 42nd, near the leaf groove accelerating region the outlet of turnout, the 43rd, the outer monolateral constraint speed Distribution Area of leaf groove outlet.

As shown in the figure, be laid with the L shaped blade of design quantity on the circle of high potential ratio impeller or the sawtoothed wheel disc, at the broad place of front middle part, L shaped interlobate leaf concentrated flow road, taking advantage of a situation is laid with 2 average rates comb leaves and namely produces 3 average rate turnouts Rotational Symmetry. 38 is nearly pressure face turnout, and 39 is nearly suction surface turnout, is middle turnout between the two. Average rate comb leaf front middle part also is radially tendency, and afterbody is smooth to be turned to, and the streamiline wire direction is pointed to leaf groove accelerating sections. The comb leaf forms intensive constraint to liquid stream under the lower prerequisite of relative velocity, the integral result on the way of its normal force will comprise a shear moment, the effect direction of this moment and the opposite direction of relative vortex, thereby consist of one of key factor of containment vortex. Prior mechanism is, because 41 approach and do not reach leaf groove entrance among turnout entrance such as the figure, because turnout outlet as 40 approach and do not reach the leaf groove and export among the figure, and its discharge area is to distribute according to an empirical coefficient that obtains through Optimum Experiment, its nearly pressure face turnout is distributed more and the distribution of near suction surface turnout is less, thereby the former pressure on the way one tunnel is lower and pressure on the way one tunnel latter is higher, the difference that this pressure field gradient distributes, under the lower prerequisite of relative velocity, just in time be the resistance power of the relative vortex of opposing, this is the main mechanism of containment vortex. In addition, the pressure difference is delivered to entrance area with less coefficient, and formed barometric gradient is again the containment factor of not combing the inlet region vortex of leaf. The formed muzzle velocity difference of pressure difference can make its acceleration such as 42 formation injection power among the figure to the outlet of nearly pressure face turnout again, and the velocity gradient that forms 43 reduces the absolute velocity in the fourths outside and the relative velocity of inboard in such as figure outside outlet, and this is desirable low-loss VELOCITY DISTRIBUTION just. This two large factor adds the favorable factors such as nearly suction surface turnout flow process is long, relatively vortex at optimized turnout discharge area than can being stopped under the condition.

No relative vortex, leaf slots and the relative speed of the fork half magnitude will decrease, which is particularly important. In the pass Often the size and specifications of the impeller speed, the relative vortex superimposed on the negative pressure side and the suction side is superimposed, can make liquid Flow velocity exceeds the threshold into the turbulent state. After half an order of magnitude lower, the flow rate can design specification of the hydraulic Inside, when the flow resistance of loss or partial loss are small enough to be neglected, as described above relatively lower-speed pre-design Mention, also apparently can be fully satisfied.

With the average rate of potential than a high turnout throughout the hydraulic efficiency of the impeller has a high resistance to cavitation characteristics of a good significant advantage. This technique Semi-open or closed, single-stage or multi-stage, with or without prerotator is not serrated wheel, would suit interior design features such as anti-friction devices The combination does not have any intrinsic incompatibility, which can be widely applied. In the process, the structure shown in Figure it is easy to manufacture The. The simplest technique is molded, including casting, powder metallurgy, injection molding, compression molding and other processes route, and simply use Cheapest two mold, its production costs are low, and the characteristics of a good balancing.

Referring to Figure 9, the figure presents a high potential than the average rate of the impeller (with the average rate of turnout than the impeller of high potential short, the same below) Prerotator combination with an embodiment. Among them, 44 is L-shaped impeller blades 45 is the average rate of fork, 46 is the next round prerotator Circle, 47 is prerotator upper rim 48 is prerotator fan blade 49 is prerotator rigid ribs 50 is the impeller shaft Sets, 51 of the impeller shaft.

High potential than the average rate impeller assembly through the sleeve 50 and positioned on the shaft 51, an L-shaped impeller blades such as 44, the formation of several The same amount of leaf slot runner. Each leaf has laid slot flow channel average rate comb leaves, such as the formation of the average rate of the fork 45 and so on. Impeller outer sleeve Wai is a cylindrical ring suction chamber cavity with axial inflow during installation prerotator. Prerotator the lower rim 46 is mounted on the suction chamber under Unit 47 mounted on the upper rim, they are used made of self-lubricating material such as polytetrafluoroethylene, and which can each independently Turn on the impeller hub site. Two wheels connected to the outer surface of the rotational surface kissing each other, the bus direction angle continuously Rotated 90 degrees so that the rotation of the flow in the load to complete the radial movement component of the axial component of motion conversion. As shown in 48, etc., Prerotator elastic sail blade hanging in 49 such as shown in the rigid ribs, rib fixed at the entrance of the impeller blade root. Work For when the ribs with a rotating impeller, fan blades and two drive wheels rotate synchronously, sail vane flow acting on it Prewhirl. Since the distributed load of the blade generates distributed deformation, the size and direction of the stress balance of the blade a propeller-shaped Surfaces and therefore decided rim lag angle. Propeller-shaped surface and the rim lag angle will change in the flow dynamics of adaptive control, This mechanism can make the loss is reduced, including blade angle of attack with adaptive contribution. ...

High potential than the average rate impeller assembly through the sleeve 50 and positioned on the shaft 51, an L-shaped impeller blades such as 44, the formation of several The same amount of leaf slot runner. Each leaf has laid slot flow channel average rate comb leaves, such as the formation of the average rate of the fork 45 and so on. Impeller outer sleeve Wai is a cylindrical ring suction chamber cavity with axial inflow during installation prerotator. Prerotator the lower rim 46 is mounted on the suction chamber under Unit 47 mounted on the upper rim, they are used made of self-lubricating material such as polytetrafluoroethylene, and which can each independently Turn on the impeller hub site. Two wheels connected to the outer surface of the rotational surface kissing each other, the bus direction angle continuously Rotated 90 degrees so that the rotation of the flow in the load to complete the radial movement component of the axial component of motion conversion. As shown in 48, etc., Prerotator elastic sail blade hanging in 49 such as shown in the rigid ribs, rib fixed at the entrance of the impeller blade root. Work For when the ribs with a rotating impeller, fan blades and two drive wheels rotate synchronously, sail vane flow acting on it Prewhirl. Since the distributed load of the blade generates distributed deformation, the size and direction of the stress balance of the blade a propeller-shaped Surfaces and therefore decided rim lag angle. Propeller-shaped surface and the rim lag angle will change in the flow dynamics of adaptive control, This mechanism can make the loss is reduced, including blade angle of attack with adaptive contribution. ...

Referring to Figure 10, the figure gives a more sophisticated and efficient as a higher potential than the cantilevered single stage pump. Wherein 52 is a Snail Road, 53 are trapezoidal groove guide ring 54 is a high potential than the average rate impeller 55 is prerotator, 56 is a mechanical seal 57 is cantilevered Shaft, 58 is a cover, 59 is a front cover.

Referring to Figure 10, the figure gives a more sophisticated and efficient as a higher potential than the cantilevered single stage pump. Wherein 52 is a Snail Road, 53 are trapezoidal groove guide ring 54 is a high potential than the average rate impeller 55 is prerotator, 56 is a mechanical seal 57 is cantilevered Shaft, 58 is a cover, 59 is a front cover....

This potential move impeller output ratio, anti-vortex cavitation, with variable conditions adaptability. Among them, for flow plus prerotator Preloading rotation, to avoid collision entrance turbulence; L-shaped blade passage and its high export potential than the design can reduce the output speed; The average rate of fork repressor relative vortex, to avoid reflux, and other harmful trailing edge vortex flow pattern, the flow field velocity layer fluidization velocity generated Gradient also reduces friction wheel speed along the outside of the neighborhood and the outlet absolute velocity.

High potential than the impeller outlet flow openings having a uniform continuous simulation of the effect of export flow velocity is equal to the radial component Divided by the wheel rim area, its value is small, which is conducive to using the cochlear duct diversion. However, when the impeller outlet width is small, such as runoff Direct use of cochlear duct diversion, or use of a wide rectangular cross-section guide ring will produce local incentives. This example uses quadratic snail Road Or a small inlet guide ring plus quadratic combination of cochlear tract diversion design.

Among them, the quadratic snail Road 52 optimized section design, consisting of two sections connected segments smooth kiss made ​​the initial segment of fixed length The long axis 2L semi-elliptical cross-section, a short axle to

b＝Qθ(2α-1+(1-α)θ/π)/(π ²LV)……………………………(9)

Be the semicircle is tuned in after a long 2L large bow, bow radius r constraints and transcendental equation

r ²(π-Sin ^_1(L/r))+L ₂(r ²-L ²) ^0.5＝Qθ(2α-1+(1-α)θ/π)/(2πV)…(10)

Here, Q, θ, α, L, V, respectively, for the design volume flow channel cross-section corresponding to the central angle worm, snail Road preferred factor snail Half the width of the entrance channel cylindrical design cochlear Road exit average velocity. Minimum friction surface and the minimum gradient design method and its equation (9), (10) holds for the design of low-loss channel cochlear significance, where (10) more style available 2 order power series analysis, or With a solution of the numerical solution. Snail Road coefficient α is an optimal value of 0.5 to a true decimal specific values, through theoretical analysis Export method can also be used is preferably obtained by a small number of tests.

(9), (10), the worm channel entrance width is the width of the impeller exit, when the width is small, there may occur locally Incentives should be inserted isosceles trapezoidal groove guide ring (53) transition. Bottom width of trapezoidal cross-section equal to cochlear entrances Road entrance and Impeller outlet width, the ratio of

L/L ₁＝ωR(1-K)/V………………………………………………………………(11)

Wherein L₁, Ω, R, K, respectively cylindrical half the width of the impeller outlet, the impeller angular velocity, the radius of the impeller, the impeller feedback reduction Ratio, high and generally trapezoidal cylindrical impeller outlet width of 3 to 5 times, that 6L₁～10L ₁More appropriate. Obviously, the guide ring as Transitional flow channel, the parameters are subject to constraints around the flow channel parameters.

Inserted into the guide ring, the impeller flow output to the tangential direction to the near, the flow line of the guide ring in the radial direction due to the pressure gradient Turned to the distribution of near continuous logarithmic spiral arc, which means that the radial coordinate incremental expansion of the flow cross-sectional area, Also means that the pressure to enter the high-pressure area to overcome the kinetic energy must be consumed for entry into acting, which is trapezoidal groove guide ring pressurization process. To Elimination of local incentives and set up the guide ring, will be the first to undertake the diversion automatic pressurized task, and then to complete the flow channel with no convergence Local incentives connectivity tasks. Inserted into the guide ring can reduce the load on road worm, which will optimize the coefficient α increases, the velocity gradient will Reduced, thus improving work efficiency. When α is close to 1, the worm channel will mainly work as a bus runner. Accordingly, Guide ring worm diversion channel optimization of load ratio and coefficient α are interrelated. ...

Inserted into the guide ring, the impeller flow output to the tangential direction to the near, the flow line of the guide ring in the radial direction due to the pressure gradient Turned to the distribution of near continuous logarithmic spiral arc, which means that the radial coordinate incremental expansion of the flow cross-sectional area, Also means that the pressure to enter the high-pressure area to overcome the kinetic energy must be consumed for entry into acting, which is trapezoidal groove guide ring pressurization process. To Elimination of local incentives and set up the guide ring, will be the first to undertake the diversion automatic pressurized task, and then to complete the flow channel with no convergence Local incentives connectivity tasks. Inserted into the guide ring can reduce the load on road worm, which will optimize the coefficient α increases, the velocity gradient will Reduced, thus improving work efficiency. When α is close to 1, the worm channel will mainly work as a bus runner. Accordingly, Guide ring worm diversion channel optimization of load ratio and coefficient α are interrelated. ...

Seen from the figure, this example snail Road occupy a larger space, which is the result of long-distance bus pour down, the pump structure The disadvantage which is very obvious. Bulky and inconvenient to use not only, but also increase the manufacturing costs. This structure inherited the traditional single-stage Pump volute channel frame, which is not a preferred embodiment of the invention, but the introduction of a single-stage pump volute channel design, its high efficiency Feature is very prominent.

Seen from the figure, this example snail Road occupy a larger space, which is the result of long-distance bus pour down, the pump structure The disadvantage which is very obvious. Bulky and inconvenient to use not only, but also increase the manufacturing costs. This structure inherited the traditional single-stage Pump volute channel frame, which is not a preferred embodiment of the invention, but the introduction of a single-stage pump volute channel design, its high efficiency Feature is very prominent....

According to the mechanical schematic structure of dynamic seal. Shaft 60 extends from the casing end seals, ring seals static friction plates 63 through Stationary static seal member 62 is fixed to the shaft seal chamber is formed on the chassis and the chassis and dynamic friction of the cylindrical surface of the sealing piece. Annular dynamic friction plate 65 sets on the shaft, rotating through the ring and the spring 66 static seals for static sealing cylindrical and planar and pass circlip Or the card pin 67 coming from the pressure and torque, synchronous rotation with the shaft. Dynamic and static friction plate friction plate is formed between the dynamic seal, generate a Constant power of heat, such as the thermal power does not pass go, dynamic seals and connecting member will heat up due to continuous and burned.

The drawing, the friction drive two-phase flow tube 64 against the seal chamber access static friction sheet, the cover 68 will seal the annular chamber and with Butt end cavity separated, leaving a circular opening 69 and axle end lumen. Two-phase flow will flow momentum of static friction pieces forming punch Strike and bubbles floating up disturbed, which can enhance the surface flow speed. Two-phase flow in 65,66,67 three rotating member driven Rotation and gas-liquid separation, the level of the radial coordinate with the openings 69, the cavity is almost filled with liquid ring is rotated. Liquid ring and friction plates There is a relative movement between the thermal convection circulation mechanisms help to reduce the ambient temperature heat sink. After warming up with a liquid absorbing isolated To re-synthesis in the export gas two-phase flow and a lower axial velocity sprayed into the end face impeller chamber. ...

The drawing, the friction drive two-phase flow tube 64 against the seal chamber access static friction sheet, the cover 68 will seal the annular chamber and with Butt end cavity separated, leaving a circular opening 69 and axle end lumen. Two-phase flow will flow momentum of static friction pieces forming punch Strike and bubbles floating up disturbed, which can enhance the surface flow speed. Two-phase flow in 65,66,67 three rotating member driven Rotation and gas-liquid separation, the level of the radial coordinate with the openings 69, the cavity is almost filled with liquid ring is rotated. Liquid ring and friction plates There is a relative movement between the thermal convection circulation mechanisms help to reduce the ambient temperature heat sink. After warming up with a liquid absorbing isolated To re-synthesis in the export gas two-phase flow and a lower axial velocity sprayed into the end face impeller chamber. ...

Referring to Figure 12, the figure shows the front end of the cavity to prevent gas escaping antifriction a gas barrier gap structure. Among them, 70 are Impeller cover 71 is a front chamber 72 is movable with the gap inlet centrifugal separation and flow channel 73 is fixed to the front cover near the impeller Shaft parts of the small ring 74 is fixed with the gap and leakage flow channel 75 is a two-phase flow tube 76 is a front cavity wall or stationary The pump into the tube, or through the suction chamber 77 is a flow channel.

In the figure, the front part of the cavity wall paraxial layout annular groove, into the groove with a small rotation of the impeller ring 74, the annular groove Abaxial separated into a top end of the V-ring groove, which side of the annular gap 72 communicates front chamber 71, the other side of the annular gap 74 communicates Suction chamber. The two-phase flow pipe connecting the gap 72, the two-phase flow in a rotating ring driven centrifugal separation, part of the flow of liquid from V Bottom of the groove-shaped gap turned 180 degrees slow flow gap 74 and the suction chamber 77, the flow resistance generated blocking effect, to prevent gas Escape, thereby forming a V-groove gap choke. Gas float rise paraxial gap space 72 front chamber 71 flows. Two-phase flow The liquid flow should be greater than the flow of runoff through 74, which is also by the rest of the gap 72 into the end of the cavity 71, and then from the impeller side Flow deflector along the gap. The selective separation mechanism requires only a small component size, because the design goal is simply in the Fork of a small neighborhood of the leak-side fluid is pure liquid on the line. ...

In the figure, the front part of the cavity wall paraxial layout annular groove, into the groove with a small rotation of the impeller ring 74, the annular groove Abaxial separated into a top end of the V-ring groove, which side of the annular gap 72 communicates front chamber 71, the other side of the annular gap 74 communicates Suction chamber. The two-phase flow pipe connecting the gap 72, the two-phase flow in a rotating ring driven centrifugal separation, part of the flow of liquid from V Bottom of the groove-shaped gap turned 180 degrees slow flow gap 74 and the suction chamber 77, the flow resistance generated blocking effect, to prevent gas Escape, thereby forming a V-groove gap choke. Gas float rise paraxial gap space 72 front chamber 71 flows. Two-phase flow The liquid flow should be greater than the flow of runoff through 74, which is also by the rest of the gap 72 into the end of the cavity 71, and then from the impeller side Flow deflector along the gap. The selective separation mechanism requires only a small component size, because the design goal is simply in the Fork of a small neighborhood of the leak-side fluid is pure liquid on the line. ...

If you sacrifice some volumetric efficiency indicators, you can not use this complex gas barrier gap, simply increase the flow of two-phase flow Volume, allowing two-phase flow directly back to divert part of the suction chamber, friction reduction can be achieved within the obtained efficiency. This is because As follows: First, when the two shunt branch flow channel in a certain length to maintain the same proportion of the gas-liquid two phase flow, the flow Will be stable, there is no escape of gas avalanche probability; Second, the volumetric efficiency of the two-phase flow of variable flow losses The rate is a small constant, and mechanical efficiency gains rate of change of internal friction is the relative amplitude of 90% or higher a Step, the high power of the amplitude function, with high sensitivity, thereby sacrificing the former can obtain efficiency gains. ...

If you sacrifice some volumetric efficiency indicators, you can not use this complex gas barrier gap, simply increase the flow of two-phase flow Volume, allowing two-phase flow directly back to divert part of the suction chamber, friction reduction can be achieved within the obtained efficiency. This is because As follows: First, when the two shunt branch flow channel in a certain length to maintain the same proportion of the gas-liquid two phase flow, the flow Will be stable, there is no escape of gas avalanche probability; Second, the volumetric efficiency of the two-phase flow of variable flow losses The rate is a small constant, and mechanical efficiency gains rate of change of internal friction is the relative amplitude of 90% or higher a Step, the high power of the amplitude function, with high sensitivity, thereby sacrificing the former can obtain efficiency gains. ...

In the figure, the pressure regulating valve 79 regulating fluid flow through into the ejector 81, ejector 80 regulate the flow through the valve of the gas Luteinizing two-phase flow through line access seal chamber cooling mechanical seal 82, the outlet flow from the annular plate center rear chamber, Its inflatable antifriction. Drive the pressure fluid jet can generally be diverted from the centrifugal tube leads out, the pressure ratio of the impeller lose A high static pressure 0.05MPa or more that is able to work properly, centrifugal pump operating parameters are usually able to meet this condition. Adjust Valve 79 for regulating the pressure of the liquid flow in the normal tuning inflatable smaller traffic. Regulating valve 80 for regulating the gas flow Volume, which may cause improper opening of the output end of low pressure chamber can not inflated or not inflated diameter larger than the maximum Value, and must be able to fine-tune. The gas should be pumped liquid harmless, because the ejector air pressure requirements for broad, In most cases, the air can be used as inflatable media, then the valve inlet of the atmosphere on the line. The capacity of the ejector 81 and Ejector pressure ratio and the output pressure should be demand-side chamber antifriction maximum inflation flow, most high-end chamber pressure to match, or not Achieve the desired results. Inflatable end chamber of the gas is generally not consumed, and therefore the flow rate required for the device is small. ...

In the figure, the pressure regulating valve 79 regulating fluid flow through into the ejector 81, ejector 80 regulate the flow through the valve of the gas Luteinizing two-phase flow through line access seal chamber cooling mechanical seal 82, the outlet flow from the annular plate center rear chamber, Its inflatable antifriction. Drive the pressure fluid jet can generally be diverted from the centrifugal tube leads out, the pressure ratio of the impeller lose A high static pressure 0.05MPa or more that is able to work properly, centrifugal pump operating parameters are usually able to meet this condition. Adjust Valve 79 for regulating the pressure of the liquid flow in the normal tuning inflatable smaller traffic. Regulating valve 80 for regulating the gas flow Volume, which may cause improper opening of the output end of low pressure chamber can not inflated or not inflated diameter larger than the maximum Value, and must be able to fine-tune. The gas should be pumped liquid harmless, because the ejector air pressure requirements for broad, In most cases, the air can be used as inflatable media, then the valve inlet of the atmosphere on the line. The capacity of the ejector 81 and Ejector pressure ratio and the output pressure should be demand-side chamber antifriction maximum inflation flow, most high-end chamber pressure to match, or not Achieve the desired results. Inflatable end chamber of the gas is generally not consumed, and therefore the flow rate required for the device is small. ...

Closed impeller centrifugal friction drive unit within the liquid by the pressure regulating valve 92, ejector 90, ejector gas regulating valve 91, a flow distribution tube 88 and the front chamber 87 and a gap 93 composed of a gas barrier. When the pump discharge pressure ratio impeller output high static pressure 0.05MPa or more, the pressure fluid from the outlet diversion leads. 92 for regulating the pressure of the liquid flow at the normal charge tuning Smaller gas flow. 91 is used to adjust the gas flow, the use of air pass into the end of its atmosphere. Ejector flow, maximum pressure And ejector pressure ratio and demand flow, maximum pressure and the inlet pressure is matched. Figure 13 is a semi-open impeller type pump , The closed impeller require both ends of inflatable chambers, and its front end with a through cavity parallel to the suction chamber back gap to Shown in Figure 12 is set to the V-groove gap choke. Since both front and rear end chamber inflatable, two-phase flow flows to be larger. Lose Delivery flow distribution tubes 87 and 88 is set up the pipe resistance coefficient difference, according to control the flow distribution, on the premise that the parallel Target end chamber in the inflated condition and has the same pressure. Fortunately, the actual situation is just so, so steady-state operation, the flow rate will Controlled by the distribution pipe. In the initialization dynamic process, the front end will be the first inflatable chamber, and the rear chamber. ...

Closed impeller centrifugal friction drive unit within the liquid by the pressure regulating valve 92, ejector 90, ejector gas regulating valve 91, a flow distribution tube 88 and the front chamber 87 and a gap 93 composed of a gas barrier. When the pump discharge pressure ratio impeller output high static pressure 0.05MPa or more, the pressure fluid from the outlet diversion leads. 92 for regulating the pressure of the liquid flow at the normal charge tuning Smaller gas flow. 91 is used to adjust the gas flow, the use of air pass into the end of its atmosphere. Ejector flow, maximum pressure And ejector pressure ratio and demand flow, maximum pressure and the inlet pressure is matched. Figure 13 is a semi-open impeller type pump , The closed impeller require both ends of inflatable chambers, and its front end with a through cavity parallel to the suction chamber back gap to Shown in Figure 12 is set to the V-groove gap choke. Since both front and rear end chamber inflatable, two-phase flow flows to be larger. Lose Delivery flow distribution tubes 87 and 88 is set up the pipe resistance coefficient difference, according to control the flow distribution, on the premise that the parallel Target end chamber in the inflated condition and has the same pressure. Fortunately, the actual situation is just so, so steady-state operation, the flow rate will Controlled by the distribution pipe. In the initialization dynamic process, the front end will be the first inflatable chamber, and the rear chamber. ...

The V-groove gap alternative gas barrier, in addition to the aforementioned two-phase flow to increase the flow rate beyond a simple way, but also in The same position with rubber, Teflon, nylon and other materials instead of the V-shaped groove soft ring choke. In liquid lubricated Provided, they can be formed between the rotary shaft of small and stable gap, the resistance of the liquid and the gas coefficient is sufficiently large, two-phase Stream flow losses will be sufficiently small. The specific method is the two-phase flow to the outlet pipe against soft ring at the contact with the shaft opening in Pressure chamber and the suction chamber side of the drive, the soft ring will get a good lubrication.

The V-groove gap alternative gas barrier, in addition to the aforementioned two-phase flow to increase the flow rate beyond a simple way, but also in The same position with rubber, Teflon, nylon and other materials instead of the V-shaped groove soft ring choke. In liquid lubricated Provided, they can be formed between the rotary shaft of small and stable gap, the resistance of the liquid and the gas coefficient is sufficiently large, two-phase Stream flow losses will be sufficiently small. The specific method is the two-phase flow to the outlet pipe against soft ring at the contact with the shaft opening in Pressure chamber and the suction chamber side of the drive, the soft ring will get a good lubrication....

Guide wheel to the heart by the cylindrical shell ring 101, the substrate 103, sleeve 104, and the radius of curvature of the guide vanes gradually decreases as 106 Components. Housing with a cavity, such as the transfer section flow channel 107, the guide vanes between the pressurized flow is slow as 109. Radial guide vane wheel number Less than the number of impeller blades, because the guide wheel is much higher than the absolute velocity of the impeller relative flow rates, larger equivalent straight Drive to reduce the drag coefficient. However, the number of vanes nor too little, too little will extend the convergence process flow increases friction area. Real Practice, you can plan or, preferably, through theoretical tests (using the preferred method) to determine the optimum design size guide vane number. In turn Shifting the flow path section, should ensure that the flow speed and direction without mutations, so that axial displacement of the low speed to complete the circumferential speed Degree will remain basically the commutation loss, and other local resistance loss will be greatly reduced. ...

Radial supercharger pulley sectional area of ​​the flow path segment and changes in the expansion rate of the design is more complex. As a mechanical parameters, it should be With the size of the pumped medium viscosity increase or decrease the resistance along the way because it is the decision of the kinetic energy loss rate of type Diversion key elements of ξ2 World. As the geometric parameters, the rate of expansion is defined as a function of diversion on the central angle is more convenient. The distribution function values ​​determined Constrained flow path boundary of the radius of curvature vanes distribution, considering the rotational symmetry, which is the same before and after the two vanes relevant points in The radius of curvature of the distribution, and the flow channel width is intuitively reflected in the relevant groups of points along the radius of curvature of the accumulation of the difference, wherein Related to the distance and the number of the channel, with the diversion changes the center angle changes. Since the whole gear ratio equals the outlet section The inverse plot, according to the rate of expansion of the distribution and the inverse, with the numerical solution of differential calculated directly related to the associated point group and its Flow line distance can be calculated by point coordinates of the guide vanes, to accurately guide the design of the desired shape of the leaves. Design You can use a constant rate of expansion, but the expansion optimization scheme based on variable rate basis. ...

Radial supercharger pulley sectional area of ​​the flow path segment and changes in the expansion rate of the design is more complex. As a mechanical parameters, it should be With the size of the pumped medium viscosity increase or decrease the resistance along the way because it is the decision of the kinetic energy loss rate of type Diversion key elements of ξ2 World. As the geometric parameters, the rate of expansion is defined as a function of diversion on the central angle is more convenient. The distribution function values ​​determined Constrained flow path boundary of the radius of curvature vanes distribution, considering the rotational symmetry, which is the same before and after the two vanes relevant points in The radius of curvature of the distribution, and the flow channel width is intuitively reflected in the relevant groups of points along the radius of curvature of the accumulation of the difference, wherein Related to the distance and the number of the channel, with the diversion changes the center angle changes. Since the whole gear ratio equals the outlet section The inverse plot, according to the rate of expansion of the distribution and the inverse, with the numerical solution of differential calculated directly related to the associated point group and its Flow line distance can be calculated by point coordinates of the guide vanes, to accurately guide the design of the desired shape of the leaves. Design You can use a constant rate of expansion, but the expansion optimization scheme based on variable rate basis. ...

To the heart of the guide wheel structure is particularly suitable for the use of two co-molding process, the low cost of production.

To the heart of the guide wheel structure is particularly suitable for the use of two co-molding process, the low cost of production....

The enlarged portion of FIG marked change in the transfer section of the flow path cross-sectional schematic outline, for simplicity, without considering the radial coordinate Changes. Transfer to the heart of the guide wheel starting from the front section of the flow path diversion channel inlet section of a cut-off the tongue (the axial plane projection of line 118), Connected to the diversion channel inlet section off the tongue only. The flow across the impeller chamber and the guide wheel is divided into the impeller chamber portion and the guide wheel Part, the former is cylindrical surface with the impeller impeller outlet chamber cover confluence space surrounded by the outside front cover temporary cavity along the curved wall Shape determined, which is diversion channel inlet segment, through the impeller chamber. Joining the two assembly kiss one sectional shape its synthesis And area with the guide wheel angle changes the center cyclical changes. Its rules are: ...

The enlarged portion of FIG marked change in the transfer section of the flow path cross-sectional schematic outline, for simplicity, without considering the radial coordinate Changes. Transfer to the heart of the guide wheel starting from the front section of the flow path diversion channel inlet section of a cut-off the tongue (the axial plane projection of line 118), Connected to the diversion channel inlet section off the tongue only. The flow across the impeller chamber and the guide wheel is divided into the impeller chamber portion and the guide wheel Part, the former is cylindrical surface with the impeller impeller outlet chamber cover confluence space surrounded by the outside front cover temporary cavity along the curved wall Shape determined, which is diversion channel inlet segment, through the impeller chamber. Joining the two assembly kiss one sectional shape its synthesis And area with the guide wheel angle changes the center cyclical changes. Its rules are: ...

Among them, the two parts of the cross-sectional area is divided into two sections changing. From the starting point to the previous paragraph anteroposterior pressurized flow diversion point, the Moved to the rearmost end of its flow cross-section on the bottom plane 117 as shown in point (angle), the impeller chamber part linearly from the minimum cross-sectional area Increases to a maximum cross-sectional area portion of the guide wheel is held constant 0. From that point to the end point, the impeller chamber part from the maximum cross-sectional area Linearly decreases to minimum cross-sectional area of ​​the guide wheel portion linearly increases from 0 to the maximum. ...

b, the minimum cross-sectional area of ​​the synthesis and the impeller chamber portion equal to the minimum cross-sectional area equal to the figure appears the tongue position 118 Line segments, curves 119 and impeller bus constituting the cylindrical surface area of ​​the triangle of the curved edge, which is the maximum axial acceleration of the fluid The limit value derived. Curve 119 consists of two elliptical arcs anastomosis with the middle section of the arc made by the cross-sectional area of ​​the analytical parameters and Endpoint coordinates. Synthesis of the maximum cross-sectional area equal to the minimum portion of the guide wheel with a maximum cross-sectional area, which is equal to Increased cross-sectional area ratio coefficient synthesis from start to finish with the bypass of the central angle of the product. The impeller chamber part of the largest cross-sectional area The tongue is equal to the occurrence of FIG line segments 118, 120 and impeller curve composed of curved surface generatrix of the cylindrical area of ​​the triangle sides. Curve 120 is the diversion channel inlet segment for the period ending confluence of the largest cross-sectional flow margin, consists of two elliptical arcs anastomosis is made, its Analytical parameters by the endpoint coordinates and diversion channel inlet segment for the period ending incremental synthesis of cross-sectional area determined. ...

c, from start to finish, with the increase of the central angle of diversion, two-part sectional shape changes of two sections. Impeller Chamber part in its cross-sectional area increases during the triangular cross-sectional shape of the curved edge, and its curve edge position by a curve 119, via a Series of curves similar to the curve in the middle of the process of change 120. Guide wheel portion in its cross-sectional area increases during the cross-sectional shape from the start Start line segment 118, through a variety of changes: the first is 118 for the semi-elliptical long axis, and its minor axis increases; into After semicircular, to semi-continuous forward margin, followed by forming the front semi-rectangular cross-section; when the tongue appears, move semicircle 116 position, the transfer chamber and impeller flow channel segments are separated and become pressurized flow channel. ...

c, from start to finish, with the increase of the central angle of diversion, two-part sectional shape changes of two sections. Impeller Chamber part in its cross-sectional area increases during the triangular cross-sectional shape of the curved edge, and its curve edge position by a curve 119, via a Series of curves similar to the curve in the middle of the process of change 120. Guide wheel portion in its cross-sectional area increases during the cross-sectional shape from the start Start line segment 118, through a variety of changes: the first is 118 for the semi-elliptical long axis, and its minor axis increases; into After semicircular, to semi-continuous forward margin, followed by forming the front semi-rectangular cross-section; when the tongue appears, move semicircle 116 position, the transfer chamber and impeller flow channel segments are separated and become pressurized flow channel. ...

Section of the guide wheel portion of change, the radial coordinate its center line may change. When the starting point is the flow vane Road entrance point, the centerline radial coordinate continuously decreases, when the starting point is the flow vane inlet end of the block, the centerline radial Coordinate unchanged. ...

Transfer section flow channel design is the key to strictly control the flow channel cross-section changes, including two-part sectional shape and area of ​​the Changed. Start from the smallest cross-sectional area, the confluence of the impeller chamber variable cross-section, the joint convergence of variable cross-section, split-sectional and other processes, the use of Long semi-elliptical shorter axle, semi-circular cross-sectional flow structures such as panning and linear expansion of the marginal cross-sectional area of ​​the method that can produce the desired The velocity field and the marginal friction loss rate control indicators, the tangential velocity, radial and axial components of the change from the wall Surface normal force impulse integral and its impact on the dynamic pressure distribution. Velocity distribution and spatial variation of the flow channel flow pattern Effects are highly sensitive, have a significant impact on efficiency, fix also produce water hammer effect or tremor cavitation cavitation effects. This is A multi-surface design of complex issues, the disclosed method is not optimal, but to prevent and control the destructive effects of friction Rub the area and increase the equivalent diameter of the target has been reflected. Although the use of the geometric programming techniques to make this design Difficult to use traditional methods of expression and the development process, but the use of modern CAD, CAM technology and molding process, the realization from To not difficult, and the cost is low. ...

Transfer section flow channel design is the key to strictly control the flow channel cross-section changes, including two-part sectional shape and area of ​​the Changed. Start from the smallest cross-sectional area, the confluence of the impeller chamber variable cross-section, the joint convergence of variable cross-section, split-sectional and other processes, the use of Long semi-elliptical shorter axle, semi-circular cross-sectional flow structures such as panning and linear expansion of the marginal cross-sectional area of ​​the method that can produce the desired The velocity field and the marginal friction loss rate control indicators, the tangential velocity, radial and axial components of the change from the wall Surface normal force impulse integral and its impact on the dynamic pressure distribution. Velocity distribution and spatial variation of the flow channel flow pattern Effects are highly sensitive, have a significant impact on efficiency, fix also produce water hammer effect or tremor cavitation cavitation effects. This is A multi-surface design of complex issues, the disclosed method is not optimal, but to prevent and control the destructive effects of friction Rub the area and increase the equivalent diameter of the target has been reflected. Although the use of the geometric programming techniques to make this design Difficult to use traditional methods of expression and the development process, but the use of modern CAD, CAM technology and molding process, the realization from To not difficult, and the cost is low. ...

Enlarged portion of the figure marked the guide wheel control transfer flow channel section schematic cross-sectional variation margin profile. This guide wheel to the heart Vanes having circumferential wall anastomosis variable curvature starting point is that after the transfer of pressurized flow channel anteroposterior point, decided by this point Transfer of the stream in the track center radial coordinate. Transfer segment impeller flow channel cross section is divided into the cavity portion and a guide wheel parts, two parts assembled anastomosis Unity. Section impeller impeller chamber portion is wrapped in the impeller cover, having a fixed area and shape of the axial velocity assumed by Degree steering adjustment component. The part of the cross-section of two adjacent guide rollers between the tongue section of the impeller chamber space communicating with the cross-sectional Surface, independent control of the cross-section and tangential and axial convergence movement. With the diversion central angle increases, the cross section of the guide wheel parts To the tongue as a starting point and end point changes periodically, the variation within a cycle are: ...

Enlarged portion of the figure marked the guide wheel control transfer flow channel section schematic cross-sectional variation margin profile. This guide wheel to the heart Vanes having circumferential wall anastomosis variable curvature starting point is that after the transfer of pressurized flow channel anteroposterior point, decided by this point Transfer of the stream in the track center radial coordinate. Transfer segment impeller flow channel cross section is divided into the cavity portion and a guide wheel parts, two parts assembled anastomosis Unity. Section impeller impeller chamber portion is wrapped in the impeller cover, having a fixed area and shape of the axial velocity assumed by Degree steering adjustment component. The part of the cross-section of two adjacent guide rollers between the tongue section of the impeller chamber space communicating with the cross-sectional Surface, independent control of the cross-section and tangential and axial convergence movement. With the diversion central angle increases, the cross section of the guide wheel parts To the tongue as a starting point and end point changes periodically, the variation within a cycle are: ...

b, section 128 by the start line segment began experiencing changes in a variety of shapes: the first is the length of the major axis 128 is semi-elliptical, Its minor axis increases; become a semicircle, the marginal semi-continuous forward to form a semicircle in front followed by a rectangular cross-section; when The tongue appears, semicircle moved 126 positions, the transfer chamber and impeller flow channel sections are separated and become pressurized flow channel.

c, the tongue appears and isolation impeller cavity, 126 and 128 define a flow path to become pressurized flow channel, continue forward and deformation. The tongue forward in a small amount left after the minimum physical width, followed by a line segment laterally into marginal backward bending of long half-ellipsoid Round, its minor axis continuously lengthened, then changed to a semicircle pan, until the final point into the flow channel bottom 127 so far. The over- The process, which prior to the semi-continuous marginal forward until the guide wheel 125 is tangent to the bottom surface, to a semi-continuous compression semi-elliptical Round, finally becomes a straight line and the bottom plane through. The centroid of the contour line or the moving speed should be greater than the corresponding period of convergence shift Moving speed of an appropriate percentage, for example more than 50%, so that the cross-sectional area of ​​the tongue and the strength can be continuously increased. Pressurized flow Road section anteroposterior forward during deceleration boost its area according to changes in requirements. ...

The program complexity significantly less than the design shown in Figure 16, the velocity distribution and the marginal friction loss rate Indicators are better than the former, the axial velocity component of the steering reaction forces and wall uniformity of distribution of the normal force is also better, the pressure pulse Moving too small. This design is based on an extension of the front cover closed impeller supporting the premise, when the end of the chamber inflated friction, by the Side end of the front cover of the friction surface of the cavity transfer section cover flow channel impeller chamber portion of all the friction surface, press 5 times legal basis, can obviously Have a greater transfer efficiency segment flow friction, so that the ultra-antifriction. Ignore the relative speed of the impeller friction inside of the cover, then turn Move the friction surface flow channel segment will be only part of the guide wheel. As the part of the marginal section of line is not a closed curve, and thus optimal cut Will no longer face shapes are round, wishing to optimize, just as the same cross-sectional area of ​​the non-closure of marginal length minimization plan On the line. The program is a simple design of optimal approximation. ...

The program complexity significantly less than the design shown in Figure 16, the velocity distribution and the marginal friction loss rate Indicators are better than the former, the axial velocity component of the steering reaction forces and wall uniformity of distribution of the normal force is also better, the pressure pulse Moving too small. This design is based on an extension of the front cover closed impeller supporting the premise, when the end of the chamber inflated friction, by the Side end of the front cover of the friction surface of the cavity transfer section cover flow channel impeller chamber portion of all the friction surface, press 5 times legal basis, can obviously Have a greater transfer efficiency segment flow friction, so that the ultra-antifriction. Ignore the relative speed of the impeller friction inside of the cover, then turn Move the friction surface flow channel segment will be only part of the guide wheel. As the part of the marginal section of line is not a closed curve, and thus optimal cut Will no longer face shapes are round, wishing to optimize, just as the same cross-sectional area of ​​the non-closure of marginal length minimization plan On the line. The program is a simple design of optimal approximation. ...

18, the figure shows the path of a central volute angle of convergence becomes symmetrical cap tube schematic. Among them, 141 Is the only port end cap assembly 142 is a pressure plate, 143 for the center channel cochlear deep inlet, 144 Walker Road shallow center, 145 Structural support for the flow channel envelope bearing cavity 146 as the center channel cochlear axial projection, 147 for the center channel cochlear of deep and shallow Between the tongue, inside and outside the entrance to the marginal jumper ring round a radial line segment, is snail Road Starting Line, 148 is the center snail Shallow channel 149 is bushings, 150 is a cylindrical annular inlet.

Symmetrical cap module consists of 141 with spigot bearing assembly cover 142, a three-dimensional on the cover and an annular channel 144 out snail Port 143 communicates with the cochlear channel interface 146 straight section of the pipeline, cochlear channel structure supporting sleeve 149 and the bearing cavity 145, etc. Results Automorphisms, is a multi-structural integration of parts. End cap to the center of volute channel is a synthetic tangential, radial and axial movement Flow line, the initial position of the annular inlet plane round the tongue 147, the end position of the radial and axial increase in ride Subject under the tongue. And within said inlet and outlet volute all have the continuity of motion in three directions, the kinetics of the fluid Time rate of change of acceleration is small, and the wall flow parameters of the spatial variation of the normal force and the rate of change is small, it is snail road Flow stable mechanical characteristics. Difficult to figure indicated by the geometric design of mechanical considerations include: the tongue from the beginning, Volute channel cross-sectional area increases in proportion to the central angle, the bottom center channel cochlear radial and axial coordinates of the sectional area with the need to expand Gradually increased, the formation of three-dimensional extension of the snail-shaped ramp, turn one week into the compartment underneath the tongue, followed by a straight line tangential section of the pipeline Anastomosis. Snail Road sectional shape variation are: the starting point of the tongue straight line segments, and then to the long axis of the inlet plane minor changes Long semi-elliptical, a semi gradually and smoothly increase sink radius of curvature of the lower part, the rate of change of curvature along a suitable involute Arc development until well into the tongue of the following, and then remain deformed cross-sectional area of ​​circular cross-section and the pipe anastomosis. ...

Symmetrical cap module consists of 141 with spigot bearing assembly cover 142, a three-dimensional on the cover and an annular channel 144 out snail Port 143 communicates with the cochlear channel interface 146 straight section of the pipeline, cochlear channel structure supporting sleeve 149 and the bearing cavity 145, etc. Results Automorphisms, is a multi-structural integration of parts. End cap to the center of volute channel is a synthetic tangential, radial and axial movement Flow line, the initial position of the annular inlet plane round the tongue 147, the end position of the radial and axial increase in ride Subject under the tongue. And within said inlet and outlet volute all have the continuity of motion in three directions, the kinetics of the fluid Time rate of change of acceleration is small, and the wall flow parameters of the spatial variation of the normal force and the rate of change is small, it is snail road Flow stable mechanical characteristics. Difficult to figure indicated by the geometric design of mechanical considerations include: the tongue from the beginning, Volute channel cross-sectional area increases in proportion to the central angle, the bottom center channel cochlear radial and axial coordinates of the sectional area with the need to expand Gradually increased, the formation of three-dimensional extension of the snail-shaped ramp, turn one week into the compartment underneath the tongue, followed by a straight line tangential section of the pipeline Anastomosis. Snail Road sectional shape variation are: the starting point of the tongue straight line segments, and then to the long axis of the inlet plane minor changes Long semi-elliptical, a semi gradually and smoothly increase sink radius of curvature of the lower part, the rate of change of curvature along a suitable involute Arc development until well into the tongue of the following, and then remain deformed cross-sectional area of ​​circular cross-section and the pipe anastomosis. ...

a, using the cover ring interfaces and three-dimensional internal channel cochlear compatible three-dimensional motion characteristics and constraints can be constructed or adaptive Health Into the impeller and the guide wheel multi-channel diversion work, convergence, rotation, steering and other connected boundary conditions, enabling it to meet the impeller inlet Connectivity requirements, and meet the export to the heart of the guide wheel connection requirements, and for single-stage pumps and multistage pumps are universal, which Produced as a single-stage and multi-stage pumps pump flow field boundary module generic model and implement a combination of conservative support modular ring Lightweight design technology base;

b% E3% 80% 81% E5% 88% A9% E7% 94% A8% E7% AB% AF% E7% 9B% 96% E7% 8E% AF% E5% BD% A2% E6% 8E% A5% E5% 8F% A3% E5% 8F% 8A% E4% B8% 89% E7% BB% B4% E8% 9C% 97% E9% 81% 93% E5% 86% 85% E9% 83% A8% E7% 9A% 84% E6% 96% B9% E5% 90% 91% E5% 85% BC% E5% AE% B9% E6% 80% A7% E5% 92% 8C% E4% B8% 89% E7% BB% B4% E8% BF% 90% E5% 8A% A8% E7% 9A% 84% E8% BF% 9E% E7% BB% AD% E6% 80% A7% EF% BC% 8C% E6% 89% A9% E5% B1% 95% E4% B8% BA% E6% B5% 81% E5% 85% A5% 0A% 20% 20% 20% 20% 20% 20% 20% 20% 20% 20% 20% 20% E6% B5% 81% E5% 87% BA% E6% 96% B9% E5% 90% 91% E4% BA% 92% E5% 8F% 8D% E7% 9A% 84% E3% 80% 81% E5% 88% 86% E6% B5% 81% E6% B1% 87% E6% B5% 81% E6% 80% A7% E8% B4% A8% E4% BA% 92% E5% 8F% 8D% E7% 9A% 84% E6% 8A% 80% E6% 9C% AF% E8% AE% BE% E8% AE% A1% E5% 85% BC% E5% AE% B9% E6% 80% A7% EF% BC% 8C% E6% 8D% AE% E4% BB% A5% E7% 94% A8% E4% BD% 9C% E5% 89% 8D% E5% 90% 8E% E9% 80% 9A% E7% 94% A8% E7% 9A% 84% E6% B5% 81% E5% 9C% BA% E5% AF% B9% E7% A7% B0% E8% BE% B9% E7% 95% 8C% 0A% 20% 20% 20% 20% 20% 20% 20% 20% 20% 20% 20% 20% E6% A8% A1% E5% 9D% 97% EF% BC% 8C% E6% 88% 90% E4% B8% BA% E6% 94% AF% E6% 8C% 81% E6% A8% A1% E5% 9D% 97% E5% 8C% 96% E7% BB% 84% E5% 90% 88% E6% 89% 80% E9% 9C% 80% E8% BF% 9E% E6% 8E% A5% E6% A8% A1% E5% BC% 8F% E7% 9A% 84% E8% BE% B9% E7% 95% 8C% E5% 9F% BA% E7% A1% 80% EF% BC% 9B

c, using the interface, and D cover the annular channel cochlear movement in three directions within the continuity of the air flow limitation and optimization A time rate of change and to make the minimum, according to the stability and low loss characteristics as a flow field boundary module so Modular combination desired connection mode better performance;

d, using the cover ring interface and mounting spigot rotational symmetry, and brought out pipe cochlear tract and the tongue-based relative Angular positioning characteristics, according to construct separate variable angle front cover features a tube to support the combination of modular assembly required Structural design, and to simplify the connection between the actual flow system;

e, using the cover of the pressure plate, bearing and other structures were integrated design features in the technology and process design Determined to be molded on a single part-type feature. After the expansion of the above techniques implication, we can construct supports connection mode Type of assembly size and interface parameters can be standardized cover new modules to expand its small size, simple design, low cost, Strong function of the value of the scope of application.

The technique is appropriate to give the desired expansion of the design. Heart will guide wheel cover with matching symmetry, thus expanded to increase the heart Pressure module and change the angle of the pipe end cap module supporting symmetry can be greatly reduced the volume of the pump, which changes the angle of the pipe work It is for the user to welcome its symmetry, its technical design and application of methods to increase the versatility of the future expansion will help Simplified centrifugal pump design, manufacture and use. All these features and utilization characteristics are conducive to expansion of the function while reducing raw Production costs and the user's total cost of ownership. This design is used in a single stage pump, its advantage is particularly evident. For example, Figure 10, Figure 13, Figure 14 shows the boom pump, the flow deflector and the bus size of the impeller periphery superimposed waste, people feel special Do Unfortunately, the application of the design disclosed in the embodiments, this disadvantage is avoided. From the following description of the embodiments disclosed, the Symmetrical cover module application advantages will be able to see more clearly. ...

The technique is appropriate to give the desired expansion of the design. Heart will guide wheel cover with matching symmetry, thus expanded to increase the heart Pressure module and change the angle of the pipe end cap module supporting symmetry can be greatly reduced the volume of the pump, which changes the angle of the pipe work It is for the user to welcome its symmetry, its technical design and application of methods to increase the versatility of the future expansion will help Simplified centrifugal pump design, manufacture and use. All these features and utilization characteristics are conducive to expansion of the function while reducing raw Production costs and the user's total cost of ownership. This design is used in a single stage pump, its advantage is particularly evident. For example, Figure 10, Figure 13, Figure 14 shows the boom pump, the flow deflector and the bus size of the impeller periphery superimposed waste, people feel special Do Unfortunately, the application of the design disclosed in the embodiments, this disadvantage is avoided. From the following description of the embodiments disclosed, the Symmetrical cover module application advantages will be able to see more clearly. ...

Refer to Figure 19 to Figure 27, the first comprehensive description of these impellers combination booster module to the heart of the common characteristics and advantages, then After their personality characteristics and their effects briefly enumerated in Table 10.

These modules that contain different impeller technology or process enabling modules, according to "near-axis annular flow from the mouth with the ring volume flow And out of the "connection mode, using the same specifications of forming one or more modules in series, and with the corresponding specifications of symmetry 2 Cover module combination, can be composed of different models, with interchangeable modules to the heart booster pump.

Booster module to the heart to the heart by the guide wheel, axial impeller and impeller chamber cover combination, and some also include other functional accessories, With a standardized interface parameters and assembly dimensions. Among them, the heart of the guide wheel is molded integrated manufacturing, and its cavity side flat or Impeller rotating surface and the formation of gap with the outer edge of the cavity side impeller design parameters are based on the transfer of the forward section of the flow path marginal surfaces, Its level segment housing has assembled the Mouth, and the shell is connected in one partition as a guide vane supporting substrate, and isolation from the impeller Chamber and the guide wheel cavity and subjected to the effect of pressure therebetween; impeller chamber cover is molded weight structural components, and its cavity side surface of revolution Impeller formed gap with the outer edge of the cavity side impeller design parameters are based on the transfer of the backward section of flow channel marginal surfaces. Assembly, along Sequence into the guide wheel, impeller and impeller chamber cover, respectively, through the shell only three ports, the impeller shaft and the guide wheel cavity positioning. Run When fluid flows from the module inlet axial rotation of the impeller, which leaves France to accept the work force and integral centrifugal acceleration along Work force increased production of specific energy, the flow into the transfer section of the guide wheel, in which the deceleration pressurized, turn 90 degrees from the near-axis circular opening With a circulation flow modules. ...

Radial booster module is a modular combination of methods and conservative circulation design of the product. Guide wheel to the heart so that the heart booster module has Fluid flow, flow channel connections, spatially periodic flow pattern parameters - from the impeller inlet to the outlet of the guide wheel cyclical, this week Sex is a modular division of the principle of the foundation. This module is based on the needs of the inversion result of purposeful design, not duality However, the use of discovery. Conservative circulation designed to optimize the flow velocity in space and time rate of change comes from the fluid machinery Partial loss of local incentives and macro law in China. The concept of complete restraint and respect for the fluid momentum moment of inertia is Paul Shou-circulation design concept foundation. These principles have been thinking and implement the present invention is characterized in the preceding series, and they are excellent Transfer of fluid dynamics, steady flow and reduce losses, etc. all have good results, even flow channel wall Load reaction forces can be reduced. These design organizations and has a global value applies to the modular approach will better Play a role. ...

Radial booster module is a modular combination of methods and conservative circulation design of the product. Guide wheel to the heart so that the heart booster module has Fluid flow, flow channel connections, spatially periodic flow pattern parameters - from the impeller inlet to the outlet of the guide wheel cyclical, this week Sex is a modular division of the principle of the foundation. This module is based on the needs of the inversion result of purposeful design, not duality However, the use of discovery. Conservative circulation designed to optimize the flow velocity in space and time rate of change comes from the fluid machinery Partial loss of local incentives and macro law in China. The concept of complete restraint and respect for the fluid momentum moment of inertia is Paul Shou-circulation design concept foundation. These principles have been thinking and implement the present invention is characterized in the preceding series, and they are excellent Transfer of fluid dynamics, steady flow and reduce losses, etc. all have good results, even flow channel wall Load reaction forces can be reduced. These design organizations and has a global value applies to the modular approach will better Play a role. ...

a, booster module to the heart to the heart by the various types of impeller and guide wheel to the combination of its internal and external assembly size and interface parameters are Standardization, interchangeability cover the design, production and use. This design can bring many benefits businesses and users and Convenient, and can greatly enrich and spread quickly centrifugal type of technology.

a, booster module to the heart to the heart by the various types of impeller and guide wheel to the combination of its internal and external assembly size and interface parameters are Standardization, interchangeability cover the design, production and use. This design can bring many benefits businesses and users and Convenient, and can greatly enrich and spread quickly centrifugal type of technology....

c, a "near-axis annular flow from the mouth of the amount of inflow and outflow belt loop" connection mode, impellers of the same diameter, and the guide Smaller than the size of the impeller shaft. Therefore, the module is compact, smallest, multi-stage pump volume decreased more than 50%, manufactured This significantly reduced. Impeller inlet and outlet guide wheel velocity distribution of the same, have the larger circumferential component. So set Meter can improve the speed of the impeller suction chamber matching characteristics and variable conditions adaptability, but also reduce the load and reduce diversion flow diversion Away. Compared with the prior art, the former belongs to generate new functional features improved structure of the latter is modified to improve performance, the two By the combined effect of the law is to change the efficiency curve rather than enhance the efficiency of the data point or period. ...

d, as enumerated instance, the module can be combined impellers of different technologies and process characteristics, including high potential ratio, radial and Axial pre-spin, anti-vortex and the average rate of the inner friction, super-class innovative anti-friction characteristics as well as traditional backward curved design, including the half-open , Closed structure. Different combinations of the impeller has a different effect modules. Potential diversion ratio and improve the efficiency of action to improve the leaf Wheel drive efficiency and improve the anti-cavitation characteristics, improving adaptability of variable conditions and other effects run directly from the innovative design of the impeller, because The modularity and mathematical programming and improve the cost, as well as in the design, production and use of a combination of interchangeability transform Generated a lot of convenience, then the benefits of belonging to the modular combination, the value Yiyin technology varies. ...

d, as enumerated instance, the module can be combined impellers of different technologies and process characteristics, including high potential ratio, radial and Axial pre-spin, anti-vortex and the average rate of the inner friction, super-class innovative anti-friction characteristics as well as traditional backward curved design, including the half-open , Closed structure. Different combinations of the impeller has a different effect modules. Potential diversion ratio and improve the efficiency of action to improve the leaf Wheel drive efficiency and improve the anti-cavitation characteristics, improving adaptability of variable conditions and other effects run directly from the innovative design of the impeller, because The modularity and mathematical programming and improve the cost, as well as in the design, production and use of a combination of interchangeability transform Generated a lot of convenience, then the benefits of belonging to the modular combination, the value Yiyin technology varies. ...

Table 10 radial supercharger enabling module description table personality characteristics and their effects

Drawing No.	Marked characteristics Module Name	Combined effect of impeller technical features and combinations described.
			Figure 19	Semi-open impeller to Heart booster module	Contains traditional semi-open impeller, given the potential flow ratio is approximately equal to a fixed specific energy increment, In the heart of the guide wheel in some kinetic energy into potential energy. Slightly lower efficiency closed impeller.
Figure 20	Closed impeller radial Booster module	Contains closed impeller, given the potential flow ratio is approximately equal to a fixed specific energy increments to the heart Guide wheel kinetic energy into potential energy in the section.

	Booster module	Guide wheel kinetic energy into potential energy in the section.
			Figure 21	Antifriction closed impeller Booster module to the heart	Closed impeller comprising an inner friction, given the potential flow ratio is approximately equal to a fixed specific energy increment, Guide wheel to the center portion of the kinetic energy into potential energy; gas-gap chamber having a front, front End chamber communicating equalizing hole friction drive two-phase flow pipe friction components, inflatable run The friction wheel 82 when the loss is reduced to 95% efficiency of 5 to 9%.
Figure 22	Both high-speed semi-open Potential than the impeller to the heart Booster module	Containing semi-open impeller than the average rate of high potential, with L-shaped blades, tangential to the exit, leaves Slot tail acceleration section, the average rate of turnout gear such as design, the output potential of dynamic flow ratio can be as high Up to 3 to 9, which lead into the low speed diversion loss. Slightly lower efficiency closed impeller.
			Figure 23	Closed-paced high potential Increase compared to the heart of the impeller Pressure Module	Contains a high potential than the average rate closed impeller has an L-shaped blades, tangential to the exit, leaves groove Accelerate the tail section, the average rate of turnout gear such as design, the output potential of dynamic flow ratio, which Into the conduction velocity is low, diversion losses low.
Figure 24	Figure 24...	Figure 24...
			Figure 25	Closed antifriction average rate High potential than the impeller to Heart booster module	Are included within the friction velocity high potential than closed impellers, with L-shaped blades, tangential to the exit, Ye trough tail acceleration section, the average rate of turnout gear design, etc., the output potential of dynamic flow ratio can be Up to 3 to 9, which lead into the low speed diversion loss; having gas gap, after End chamber communicating equalizing hole friction drive two-phase flow pipe friction components, dramatically reducing the wheel Disc friction losses.
Figure 26	Antifriction prewhirl closed Average rate high potential leaf Round to the heart booster mode Block	Contains pre-pronation antifriction closed impeller than the average rate of high potential, with L-shaped blades, tangential to the Exports accelerated leaf trough tail section, the average rate of turnout gear such as design, the output flow potential Activity ratio can be up to 3 to 9, which lead into the low speed diversion loss; having a front chamber gas- Clearance, front and rear side equalizing chamber communicating hole friction drive two-phase flow pipe friction components, Inflatable wheel running significantly reduce friction losses; contains prerotator axial stream, etc. Pre-spin speed, the impeller inlet with operating conditions change adaptability, improve efficiency and to avoid cavitation. ...
			Contains pre-pronation antifriction closed impeller than the average rate of high potential, with L-shaped blades, tangential to the Exports accelerated leaf trough tail section, the average rate of turnout gear such as design, the output flow potential Activity ratio can be up to 3 to 9, which lead into the low speed diversion loss; having a front chamber gas- Clearance, front and rear side equalizing chamber communicating hole friction drive two-phase flow pipe friction components, Inflatable wheel running significantly reduce friction losses; contains prerotator axial stream, etc. Pre-spin speed, the impeller inlet with operating conditions change adaptability, improve efficiency and to avoid cavitation. ...	Ultra-antifriction prerotator closed Type than the average rate of high potential Impeller radial supercharger Module	Antifriction prerotator contains ultra-paced high-potential than closed impellers, with L-shaped blades, tangential to the Exports accelerated leaf trough tail section, the average rate of turnout gear such as design, the output flow potential Activity ratio can be up to 3 to 9, which lead into the low speed diversion loss; having a front chamber gas- Clearance and front-end cavity friction drive two-phase flow tube which extends impeller cover wrapped shift Paragraph impeller flow channel cross section chamber portion, inflatable wheel running significantly reduce friction loss And the transfer bus flow friction losses; contains prerotator axial constant stream prerotation, Impeller inlet adaptability with changes in working conditions, improve efficiency and to avoid cavitation. ...

Antifriction prerotator contains ultra-paced high-potential than closed impellers, with L-shaped blades, tangential to the Exports accelerated leaf trough tail section, the average rate of turnout gear such as design, the output flow potential Activity ratio can be up to 3 to 9, which lead into the low speed diversion loss; having a front chamber gas- Clearance and front-end cavity friction drive two-phase flow tube which extends impeller cover wrapped shift Paragraph impeller flow channel cross section chamber portion, inflatable wheel running significantly reduce friction loss And the transfer bus flow friction losses; contains prerotator axial constant stream prerotation, Impeller inlet adaptability with changes in working conditions, improve efficiency and to avoid cavitation. ...

In this case, semi-open impeller booster module to the heart to the heart by the guide wheel (157), semi-open impeller (154) and impeller chamber cover Plate (152) axial combination. Among them, the guide wheel (157) and impeller chamber cover (152) on the surface of revolution, the two outer Transfer segments are in line with the flow path with curved semi-open impeller (154) designed parameters, including the shape of the foot according to the impeller Inch and with the gap rotating surface of the bus to determine the coordinates and the basis for determining transfer fluid parameters section flow channel wall coordinates.

In this case, semi-open impeller booster module to the heart to the heart by the guide wheel (157), semi-open impeller (154) and impeller chamber cover Plate (152) axial combination. Among them, the guide wheel (157) and impeller chamber cover (152) on the surface of revolution, the two outer Transfer segments are in line with the flow path with curved semi-open impeller (154) designed parameters, including the shape of the foot according to the impeller Inch and with the gap rotating surface of the bus to determine the coordinates and the basis for determining transfer fluid parameters section flow channel wall coordinates....

Refer to Figure 20, the figure gives a modular combination of classic closed impeller and the guide wheel to the heart to the heart of pressurized modules. Among them, 161 Is the impeller inlet, impeller chamber cover 162 is, 163 is the assembly of the Mouth, closed impeller 164 is a conventional technology, 165 is transferred Paragraph impeller flow channel cross section chamber portion 166 is a cross-section of the flow path segment transfer guide wheel portion 167 is with a guide wheel housing to the heart, 168 is a guide wheel pressurized flow channel 169 is alternately Road exit guide cylindrical surface 170 is a constraint of the impeller shaft.

In this example, closed impeller booster module to the heart to the heart by the guide rollers 167, 164 and closed impeller axial impeller chamber cover 162 Combination. Among them, the guide wheel 167 and the impeller chamber cover 162 rotates on the surface, the two outer flow channel with curved segment transfers are With closed impeller 164 is specifically designed for the parameters, including the size and shape based on closed impeller rotation is determined with the gap song Surface coordinates and bus transfers in accordance with paragraph fluid parameters determine coordinates of the flow channel wall, including 162 from the impeller chamber cover dredged leaf The space occupied by the wheel cover to make leaf trough passage and outlet channel anastomosis. The module assembly requirements, operating principles, adaptability And Application of the embodiment shown in Figure 19 is basically the same, except that the closed impeller with the performance difference. ...

Referring to Figure 21, the figure gives a modular combination of classic closed impeller and guide wheels to the heart and with the combination of internal friction technology to further Booster module to the heart. Wherein the cavity of the impeller 171 is mounted on the cover of the V-shaped annular groove gap choke cover 172 is a safe Mounted on the cover of the impeller with a small rotation of the V-shaped groove ring, 173 is a V-shaped groove of the two-phase gas-inlet gap, 174 Is through the housing and impeller chamber cover into the inlet 173 of a pneumatic drive two-phase flow tube 175 is the impeller chamber cover 176 is Front wheel inflatable chamber 177 is laid on the impeller blades passing through the front cover of the front and rear ends fixed rivet equalizing chamber communicating hole, 178 is inflatable rear chamber 179 is band housing guide wheel 180 is closed impeller. ...

In this example, closed impeller radial antifriction booster module to the heart by the guide rollers 179, 180 and impeller closed impeller chamber cover 175 And V-shaped annular groove choke gap cover 171, V-shaped groove snap ring 172, inflatable drive two-phase flow tube 174, the front cover fixing rivets The front end of the cavity pressure equalization hole 177 and other friction parts or structures within the combination. Among them, the guide rollers 179 and 175 of the impeller chamber cover The surface of revolution, the two outer flow channel segment transfer surfaces are in line with the parameters of closed impeller 180 specially designed, including From the impeller chamber lid 175 dredged the space occupied by the impeller cover to make leaf slot flow channel and outlet channel anastomosis. By the impeller chamber cover The ring groove 175, the cover 171 and the rotating annular ring 172 of the V-shaped groove constituting the gas barrier can be maintained within the gap antifriction state. All Pressure chamber and the bore 177 so that the back-end and front-end connectivity isobaric chamber filling gas friction, without additional takeover. Into the tube 174 connected to the ejector And other two-phase flow-driven pressure source, you can drive double-ended cavity friction. The module assembly requirements, operating principles and adaptability and The embodiment shown in Figure 20 is basically the same technology will enable the portfolio antifriction roulette closed impeller friction losses decreased by 82% to 95%, Pump efficiency will thus be increased by 5 to 9%. ...

In this example, closed impeller radial antifriction booster module to the heart by the guide rollers 179, 180 and impeller closed impeller chamber cover 175 And V-shaped annular groove choke gap cover 171, V-shaped groove snap ring 172, inflatable drive two-phase flow tube 174, the front cover fixing rivets The front end of the cavity pressure equalization hole 177 and other friction parts or structures within the combination. Among them, the guide rollers 179 and 175 of the impeller chamber cover The surface of revolution, the two outer flow channel segment transfer surfaces are in line with the parameters of closed impeller 180 specially designed, including From the impeller chamber lid 175 dredged the space occupied by the impeller cover to make leaf slot flow channel and outlet channel anastomosis. By the impeller chamber cover The ring groove 175, the cover 171 and the rotating annular ring 172 of the V-shaped groove constituting the gas barrier can be maintained within the gap antifriction state. All Pressure chamber and the bore 177 so that the back-end and front-end connectivity isobaric chamber filling gas friction, without additional takeover. Into the tube 174 connected to the ejector And other two-phase flow-driven pressure source, you can drive double-ended cavity friction. The module assembly requirements, operating principles and adaptability and The embodiment shown in Figure 20 is basically the same technology will enable the portfolio antifriction roulette closed impeller friction losses decreased by 82% to 95%, Pump efficiency will thus be increased by 5 to 9%. ...

In this case, semi-open impeller than the average rate of high potential booster module to the heart to the heart by the guide rollers 188, semi-open impeller than the average rate of high potential 183 and cover 182 axial impeller chamber combination. Among them, the guide rollers 188 and 182 of the impeller chamber cover surface of revolution, the two Outer flow channel with curved segment transfers are in line with the average rate of semi-open impeller 183 high-potential parameters than designed. Work, Is the average rate of relative vortex fork repressor, fluidized flow velocity layer and accelerate acceleration section 184, exit velocity equal decreases.

In this case, semi-open impeller than the average rate of high potential booster module to the heart to the heart by the guide rollers 188, semi-open impeller than the average rate of high potential 183 and cover 182 axial impeller chamber combination. Among them, the guide rollers 188 and 182 of the impeller chamber cover surface of revolution, the two Outer flow channel with curved segment transfers are in line with the average rate of semi-open impeller 183 high-potential parameters than designed. Work, Is the average rate of relative vortex fork repressor, fluidized flow velocity layer and accelerate acceleration section 184, exit velocity equal decreases....

Referring to Figure 23, the figure shows the combination of modular high-speed potential than the average closed impeller and the guide wheel to the heart to the heart of pressurized modules. Its , The 191 is a high potential than the average rate closed impeller, the impeller chamber cover 192, 193 is the impeller cover and impeller cover 194 is fixed rivets, 195 is the impeller speed tail section, section 196 is to transfer the impeller flow channel cross-section cavity portion 197 is a cross-section of the flow channel transfer segment Guide wheel part 198 is to the heart with a shell guide wheel, guide wheel 199 is pressurized flow channel 200 is a cylindrical surface conduction Road exit turn.

In this example, the average rate of high-potential than closed impeller booster module to the heart to the heart by the guide rollers 198, semi-Ji-style high-potential than the average rate impeller 193 And axial impeller chamber cover 192 combination. Among them, the guide rollers 188 and 182 of the impeller chamber cover surface of revolution, the two outer Transfer section flow channel with a closed surface are in line with the average rate of high-potential parameters than 193 specially designed impeller, including from the impeller chamber cover 192 dredged the space occupied by the impeller cover to make leaf slot flow channel and outlet channel anastomosis. Work, is the average rate of relative vortex Fork repressor, fluidized flow velocity layer and accelerate acceleration section 195, exit velocity equal decreases.

The module assembly shown in Figure 20 requires the same embodiment. Closed impeller than the average rate of potential output high potential than the big move Up to about 3 to 9, the impeller working speed 20 m / sec or more, to the heart of the guide wheel into conduction ratio will be greatly reduced. The mold Block impeller drive more efficient than semi-open impeller module, which are high-speed potential than advantages, modular design technology brings benefits and group Brings together the functionality and performance benefits will be reflected better. This module is further combined basis for the design other innovative technologies.

Refer to Figure 24, the figure shows the combination of modular high-potential than the average rate closed impeller, axial flow prerotator and come to the heart of the guide wheel Booster module to the heart. Among them, 201 are axially stream prerotator, 202 impeller chamber lid 203 is the impeller cover 204 is closed High potential than the average rate impeller 205 is impeller speed tail section, section 206 is to transfer part of the flow path cross-sectional impeller chamber 207 is transferred Shift region runner-section guide wheel portion 208 is a guide to the heart with a shell wheel, guide wheel 209 is pressurized flow channel 210 is a guide wheel outlet.

In this case, the pre-spin potential than closed impellers are high-speed booster module to the heart to the heart by the guide rollers 208 are high-speed potential than closed impeller 204, 201 and prerotator impeller chamber cover 202 combination. Wherein the guide wheel 188 and the impeller chamber cover 182 of the rotating curved Surface, the two outer flow channel segment transfer surfaces are in line with the average rate of high-potential than closed impeller 193 parameters specially designed package Including 192 from the impeller chamber cover dredged the space occupied by the impeller cover to make leaf slot flow channel and outlet channel anastomosis. Work, the phase Is the average rate on the vortex fork repressor, fluidized flow velocity layer, and in the acceleration segment accelerated exit velocity equal decreases. Prerotator 201 to the axial-flow generating constant pre-spin, so that the impeller inlet flow field with adaptive changes in working conditions, to avoid turbulence and cavitation. ...

In this case, the pre-spin potential than closed impellers are high-speed booster module to the heart to the heart by the guide rollers 208 are high-speed potential than closed impeller 204, 201 and prerotator impeller chamber cover 202 combination. Wherein the guide wheel 188 and the impeller chamber cover 182 of the rotating curved Surface, the two outer flow channel segment transfer surfaces are in line with the average rate of high-potential than closed impeller 193 parameters specially designed package Including 192 from the impeller chamber cover dredged the space occupied by the impeller cover to make leaf slot flow channel and outlet channel anastomosis. Work, the phase Is the average rate on the vortex fork repressor, fluidized flow velocity layer, and in the acceleration segment accelerated exit velocity equal decreases. Prerotator 201 to the axial-flow generating constant pre-spin, so that the impeller inlet flow field with adaptive changes in working conditions, to avoid turbulence and cavitation. ...

Refer to Figure 25, the figure gives a modular combination of both high-speed potential than closed impeller, internal friction components and guide wheel to the heart to the heart Booster module. Wherein the cavity of the impeller 211 is mounted on the cover of the V-shaped annular groove gap choke cover 212 is mounted on the leaf Wheel cover with a small rotation of the V-shaped groove ring, 213 is a V-shaped groove of the two-phase gas-inlet gap 214 is through Housing and impeller chamber cover into the inlet 213 of a pneumatic drive two-phase flow tube 215 is the impeller chamber cover 216 is inflated Front impeller chamber 217 is laid on the impeller blades in through the front cover fixing rivets connecting the front and rear end of the cavity pressure equalization hole, 218 Is inflatable rear cavity 219 is a band shell guide wheel 220 is closed impeller. ...

In this example, the average rate of high friction potential than closed impeller booster module to the heart to the heart of mountain guide wheel 219, closed impeller than the average rate of high potential 220, the impeller chamber 215 and the V-shaped groove plate choke annular gap cover 211, V-shaped ring groove 212, the two-phase flow conduit 214, The front cover of the front end chamber rivet pressure equalizing hole 217 and other components or structures inside the antifriction combination. Among them, the guide wheel 219 and the impeller chamber Cover 215 on the surface of revolution, the two outer flow channel segment transfer surfaces are in line with the average rate of the closed impeller 220 high-potential parameters than Number of specially designed impeller chamber lid 215 dredged on the space occupied by the impeller cover to make leaf trough passage connected with the outlet channel kiss Work, the relative speed of the scroll are both fork repressor, fluidized flow velocity layer, and in the acceleration section in acceleration, velocity, etc. minus exports Is small, the cover 215 by the impeller chamber the ring groove, the cover 211 and the rotating annular ring 212 of the V-shaped groove constituting the gas barrier clearance can protect Antifriction held within the state. Pressure equalization hole 217 so that the back-end cavity communicating with the front cavity filling gas pressure and friction, etc., without additional takeover. Enter Ejector pipe 214 connected to other two-phase flow-driven pressure source, you can drive double-ended cavity friction. ...

In this example, the average rate of high friction potential than closed impeller booster module to the heart to the heart of mountain guide wheel 219, closed impeller than the average rate of high potential 220, the impeller chamber 215 and the V-shaped groove plate choke annular gap cover 211, V-shaped ring groove 212, the two-phase flow conduit 214, The front cover of the front end chamber rivet pressure equalizing hole 217 and other components or structures inside the antifriction combination. Among them, the guide wheel 219 and the impeller chamber Cover 215 on the surface of revolution, the two outer flow channel segment transfer surfaces are in line with the average rate of the closed impeller 220 high-potential parameters than Number of specially designed impeller chamber lid 215 dredged on the space occupied by the impeller cover to make leaf trough passage connected with the outlet channel kiss Work, the relative speed of the scroll are both fork repressor, fluidized flow velocity layer, and in the acceleration section in acceleration, velocity, etc. minus exports Is small, the cover 215 by the impeller chamber the ring groove, the cover 211 and the rotating annular ring 212 of the V-shaped groove constituting the gas barrier clearance can protect Antifriction held within the state. Pressure equalization hole 217 so that the back-end cavity communicating with the front cavity filling gas pressure and friction, etc., without additional takeover. Enter Ejector pipe 214 connected to other two-phase flow-driven pressure source, you can drive double-ended cavity friction. ...

Refer to Figure 26, the figure gives a modular combination of both high-speed potential than closed impeller, internal friction components prerotator and lead to heart Wheel booster module to the heart. Among them, 221 are axially prerotator stream 222 is mounted on the cover with a rotating impeller The V-shaped groove so small gas barrier ring-gap structure 223 is passing through the cover into the housing and the impeller chamber of the pneumatic drive two-phase flow tube, 224 is the impeller cover 225 is the impeller chamber cover 226 is inflated front impeller chamber 227 is fixed to the front cover laid rivets In the front and rear ends of the impeller chamber pressure equalizing hole 228 is to the heart with a shell guide wheel 229 is inflated rear chamber 230 is a high potential average rate Than closed impeller.

In this case, the pre-rotation friction potential than closed impellers are high-speed booster module to the heart to the heart of mountain guide wheel 228, closed high potential than the average rate Impeller 230, the cover 225 and the axial impeller chamber to flow prerotator 221 and the V-shaped groove ring gas barrier structure 222, a two-phase flow pipe 223 and other components. Among them, the guide wheel 228 and the impeller chamber cover 225 rotates on the surface, the two outer flow channel with the transfer section Closed surfaces are in line with the average rate of high-potential parameters than the impeller 230 specially designed. Work, leaves no relative vortex tank, liquid Flow speed in the flow channel section in the speed, thereby reducing the exit velocity equal. Trap the impeller wheel sleeve and a rigid ribs fixed On the impeller cover prerotator 221 for axial load prerotator stream. The impeller chamber cover of the V-groove 222 and the gas barrier structure Front-end connectivity equalizing chamber in the inner hole 227 and other anti-friction components, such as two-phase flow ejector driving pressure source, you can drive double-ended cavity Internal friction. ...

This module assembly requirements and the same example shown in Figure 21. Work, closed high potential than the average rate through the flow channel impeller 230 Increase in the relative velocity tail acceleration section, the outlet flow rate equal decreases, so that diversion efficiency greatly improved. Combination makes prerotator 221 To constant axial flow generating pre-spin, so that the direction of the impeller inlet velocity field with adaptive changes in working conditions, so that the impeller efficiency and To avoid cavitation. Portfolio antifriction technology will improve the efficiency of the pump 5 to 9%. Potential Activity impeller output ratio of up to 3 to 9, the impeller speed Caps up to 20 m / sec or more. This module is more efficient than all of the foregoing examples. Its modular design process efficiency, and Effectiveness of the combination of other modules, will enable the combined structure of the module instance centrifugal pump design became the hottest one of the components selected. ...

Refer to Figure 27, the figure gives a modular combination of both high-speed potential than closed impeller, super anti-friction components prerotator and lead to heart Wheel booster module to the heart. Among them, 231 are axially prerotator stream 232 is mounted on the cover with a rotating impeller The V-ring groove 233 is passing through the cover into the housing and the impeller chamber of the pneumatic drive two-phase flow tube 234 and the packet is to extend the With the transfer segment channel impeller chamber cross section of the impeller cover 235 is the impeller chamber cover 236 is a high potential than the average rate closed impeller, 237 impeller cover is coated with antifriction extended after the transfer section of the flow channel cross-sectional portion of the impeller chamber 238 is entered from the guide wheel housing Inflatable tube into the rear chamber 239 is pressurized flow channel guide wheel 240 is to the heart with a shell guide wheel. ...

In this example, ultra-antifriction prerotator potential than closed impellers are high-speed booster module to the heart to the heart by the guide rollers 240, turn coated with extension Move segment channel impeller chamber cross sections are closed impeller cover 234 high-speed impeller 236 potential ratio, impeller chamber cover 235 and the shaft Prerotator always flow friction components 231 and Ultra 232, two-phase flow tube 233 and other components. Among them, the guide wheel 228 and impeller Chamber cover 225 on the surface of revolution, the two outer flow channel with curved segment transfers are in line with the average rate of high-potential than closed impeller 230 Parameters designed. Work, leaves no relative vortex tank, the flow speed in the flow channel section in the speed, thereby reducing the equivalent Exit velocity. Prerotator 221 for axial load prerotator stream. Mounted on the cover plate of the impeller chamber the gas barrier V-shaped groove spacer ring Shaped cover mounted on the impeller cover with a rotating ring 232 and the entrance to the impeller chamber cover ring composed of V-shaped grooves Slot choke gap as an important component supports ultra-antifriction extends to the transfer section channel impeller chamber inflatable chamber portion of the front end does not leak. After End of the chamber to a pressure slightly lower inflation alone, the inlet pipe 238 through the guide wheel housing seal to enter, can be filled into the flow being controlled pure Gas, etc. can also be front chamber inflatable jet drive two-phase flow pressure source through the shunt regulator valve throttled access, its pressure drop is Adaptive. Stator shaft sleeve may be connected static sealing, may also be connected to pressurized liquid seal, so no danger of leakage. ...

In this example, ultra-antifriction prerotator potential than closed impellers are high-speed booster module to the heart to the heart by the guide rollers 240, turn coated with extension Move segment channel impeller chamber cross sections are closed impeller cover 234 high-speed impeller 236 potential ratio, impeller chamber cover 235 and the shaft Prerotator always flow friction components 231 and Ultra 232, two-phase flow tube 233 and other components. Among them, the guide wheel 228 and impeller Chamber cover 225 on the surface of revolution, the two outer flow channel with curved segment transfers are in line with the average rate of high-potential than closed impeller 230 Parameters designed. Work, leaves no relative vortex tank, the flow speed in the flow channel section in the speed, thereby reducing the equivalent Exit velocity. Prerotator 221 for axial load prerotator stream. Mounted on the cover plate of the impeller chamber the gas barrier V-shaped groove spacer ring Shaped cover mounted on the impeller cover with a rotating ring 232 and the entrance to the impeller chamber cover ring composed of V-shaped grooves Slot choke gap as an important component supports ultra-antifriction extends to the transfer section channel impeller chamber inflatable chamber portion of the front end does not leak. After End of the chamber to a pressure slightly lower inflation alone, the inlet pipe 238 through the guide wheel housing seal to enter, can be filled into the flow being controlled pure Gas, etc. can also be front chamber inflatable jet drive two-phase flow pressure source through the shunt regulator valve throttled access, its pressure drop is Adaptive. Stator shaft sleeve may be connected static sealing, may also be connected to pressurized liquid seal, so no danger of leakage. ...

Ultra antifriction techniques wheel friction loss by 82% to 95% which makes the pump efficiency by 5 to 9% of the full effectiveness of reduction within the same Mount technology, at the same time, it also enables the transfer section flow channel convergence speed friction losses in most of the district eliminated. According to uniform Circular motion calculation, this part of the loss of the incoming guide absolute square of the velocity, and the guide vane wheel diameter and the number of convergence decision Flow proportional to the length and cross-section is proportional to the length of the arc marginal friction. Eliminate this part of the margin actually belongs to reduce friction Diversion of revenue loss coefficient, according to the transfer section equivalent diameter of the flow channel and its expansion rate, flow rate and viscosity changes and media And other parameters to estimate, or a loss of points along the way to make precise. These calculations were performed with a specific flow parameters. ...

Ultra antifriction techniques wheel friction loss by 82% to 95% which makes the pump efficiency by 5 to 9% of the full effectiveness of reduction within the same Mount technology, at the same time, it also enables the transfer section flow channel convergence speed friction losses in most of the district eliminated. According to uniform Circular motion calculation, this part of the loss of the incoming guide absolute square of the velocity, and the guide vane wheel diameter and the number of convergence decision Flow proportional to the length and cross-section is proportional to the length of the arc marginal friction. Eliminate this part of the margin actually belongs to reduce friction Diversion of revenue loss coefficient, according to the transfer section equivalent diameter of the flow channel and its expansion rate, flow rate and viscosity changes and media And other parameters to estimate, or a loss of points along the way to make precise. These calculations were performed with a specific flow parameters. ...

Figure 28 to Figure 36 is a modular approach based on a combination booster module to the heart and to the heart of symmetric cover modules from a single-stage supercharger Examples of cardiac pump. First, from the description below, the overall single-stage centrifugal supercharger to the heart of the common features and advantages of the properties, and then every A pump's personality characteristics and effects tabulated be explained.

Figure 28 to Figure 36 is a modular approach based on a combination booster module to the heart and to the heart of symmetric cover modules from a single-stage supercharger Examples of cardiac pump. First, from the description below, the overall single-stage centrifugal supercharger to the heart of the common features and advantages of the properties, and then every A pump's personality characteristics and effects tabulated be explained....

According to the present invention is a modular combination method, the same parent specification base interface module assembly dimensions and parameters are the same, with a There lookup test interchangeability, the same sub-standard with full interchangeability of the two modules can be assembled with standard correspondence. Its Interchangeable cover design, the design of future production process and production after the use of the process.

Based on these conditions, the present invention a single-stage centrifugal pump modular combination of specific programs are: contains two variable angle of tube symmetry Cover module and a pressurized module to the heart, according to both modules each with corresponding sub-specifications completely interchangeable, or according to the corresponding Specifications of the table on which the parent test medium, maximum speed, maximum temperature, maximum pressure and other parameters interchangeability established, press the "flow from the Paraxial circular mouth with ring volume inflow and outflow "Connection mode 3 modules axial combinations that constitute a module for interchangeability Said cover variable angle of the tube to the heart of a single-stage centrifugal supercharger, the combination is designed in connection with the production of the assembly and use of the Repair, interchangeable cover these procedures. ...

Based on these conditions, the present invention a single-stage centrifugal pump modular combination of specific programs are: contains two variable angle of tube symmetry Cover module and a pressurized module to the heart, according to both modules each with corresponding sub-specifications completely interchangeable, or according to the corresponding Specifications of the table on which the parent test medium, maximum speed, maximum temperature, maximum pressure and other parameters interchangeability established, press the "flow from the Paraxial circular mouth with ring volume inflow and outflow "Connection mode 3 modules axial combinations that constitute a module for interchangeability Said cover variable angle of the tube to the heart of a single-stage centrifugal supercharger, the combination is designed in connection with the production of the assembly and use of the Repair, interchangeable cover these procedures. ...

In manufacturing, assembly and repair used when the heart booster module is based on the guide wheel, impeller and impeller chamber cover assembly sequence, Respectively, for the three mouth through the shell, the shaft and the impeller chamber positioning guide wheel, or have other accessories installed at their specific location opportunistic With. Disassembly and assembly procedures for the process is reversed.

In manufacturing, assembly and repair used when the heart booster module is based on the guide wheel, impeller and impeller chamber cover assembly sequence, Respectively, for the three mouth through the shell, the shaft and the impeller chamber positioning guide wheel, or have other accessories installed at their specific location opportunistic With. Disassembly and assembly procedures for the process is reversed....

The advantages of the process are: 1, the whole conservative circulation, diversion load is light, space and time rate of change is small, steady flow field Qualitatively good, inappropriate "toss" less, thus reducing wear and tear; 2, the amount of inter-module conservative ring shunt convergence process results Together so that the local loss is reduced, avoiding the diversion prior art problems and constraints improper diversion of under-constrained problem, the impeller Characteristics of a good entrance; 3, enabling the module's internal shunt convergence process and no local incentives, which is on the transfer of the present invention Specially designed section of flow results. Booster pump to the heart at all, except those who may not have a sync prerotator hair on the impeller inlet Health impact loss, the rest of the species have a better flow constraints, with most of the variable condition adaptability. In particular, a There are pre-spin potential than the mechanism by high speed, the entire process is complete constraints, has the highest hydraulic efficiency and complete adaptation variable conditions Sex. The mechanism having an inner friction, their internal efficiency and total efficiency can be increased by 5 to 9% alone. ...

The advantages of the process are: 1, the whole conservative circulation, diversion load is light, space and time rate of change is small, steady flow field Qualitatively good, inappropriate "toss" less, thus reducing wear and tear; 2, the amount of inter-module conservative ring shunt convergence process results Together so that the local loss is reduced, avoiding the diversion prior art problems and constraints improper diversion of under-constrained problem, the impeller Characteristics of a good entrance; 3, enabling the module's internal shunt convergence process and no local incentives, which is on the transfer of the present invention Specially designed section of flow results. Booster pump to the heart at all, except those who may not have a sync prerotator hair on the impeller inlet Health impact loss, the rest of the species have a better flow constraints, with most of the variable condition adaptability. In particular, a There are pre-spin potential than the mechanism by high speed, the entire process is complete constraints, has the highest hydraulic efficiency and complete adaptation variable conditions Sex. The mechanism having an inner friction, their internal efficiency and total efficiency can be increased by 5 to 9% alone. ...

1, radial supercharger diversion structures smallest, lowest cost, and efficiency is higher.

2, radial flow from the pressurized modules have nearly the amount of axial shaft ring led astray into and out of the mouth of the modules normative.

3, compared to the conventional symmetrical cap shell, its volume is greatly reduced, and therefore lower cost and higher efficiency.

4, the end cap as an axial symmetry around common encapsulation module, a single multi-stage GM, its worm shaft near the ring road from the mouth with a belt loop The amount of inflow and axial outflow sinks normative modules, which a tube with variable angle mounting adaptability anastomosis with cochlear Road Bi-linear and rotary motion generates efficient conversion function. Connect it featured, low cost, wide adaptation.

5, on the whole, the connection normative module interchangeability, versatility embody or potentially contains a modular group Approach brings together the design, manufacture and use of the technical and economic benefits, including reducing the workload, shorten the construction period, increased side Then, simplify product lines and materials, accessories type specifications, reducing normative technical barriers to accelerating technological and material flow, multi-factor Reduce costs, and so on.

Symmetric cover variable angle centrifugal supercharger outlet pipe to the heart of the different technical characteristics of different instances, the performance difference is also great. These mutual Differences in personality characteristics and functional performance characteristics, the list briefly described in Table 11.

Table 11 symmetrical cover variable angle tube to the heart of the single-stage booster pump personality characteristics and their effects described in Table

Drawing No.	Marked characteristics Centrifugal full name	Technical characteristics and personality and instructions marked effect (The innovative feature or features contained in the innovative combination of traditional, resulting in a positive effect)
			Figure 28	Symmetric cover variable angle of tube half Open impeller radial supercharger Single-stage centrifugal pump	Contains a semi-open impeller radial symmetry pressurized modules and two modules cover, impeller Output potential than liquid flows often lead. Its characteristics are: adaptive variable conduction processes running conditions, Diversion efficiency, but lower than the high potential than the flow, process efficiency is lower than the impeller closed impeller.
Figure 29	Symmetric angle-out tube closure cap Impeller radial supercharger single Stage centrifugal pump	Contains a closed impeller radial symmetry pressurized module and 2 modules cover, impeller lose A constant potential than liquid flow guide. Its characteristics are: adaptive variable conduction processes running conditions, lead Flow efficiency, but lower than the high potential flow.
			Figure 30	Symmetric cover variable angle of the tube Closed impeller radial antifriction Single-stage centrifugal supercharger	Contains an internal friction closed impeller radial symmetry pressurized modules and two end caps modules Let gas barrier clearance, front and rear side equalizing chamber communicating hole friction drive two-phase flow pipe junction Structure, with internal friction mechanism. Its characteristics are: adaptive variable conduction processes running conditions, Diversion efficiency, but lower than the high potential flow, internal efficiency by 5% to 9%.
Figure 31	Symmetric cover variable angle of tube half Average rate high potential open leaf Round off to the heart of a single-stage turbocharger Heart Pump	Contains a semi-open impeller than the average rate to the heart of the high potential booster modules and two symmetrical cap Module, Let L-shaped blades, tangential to the outlet, rear leaf trough acceleration section, the average rate of turnout Other structure, with containment relative vortex impeller output decelerated speed into the conduction mechanisms. Its characteristics are: adaptive variable conduction processes running conditions, the pressure coefficient is increased, the potential dynamic than Up to 3 to 9, the deflector loss is reduced an order of magnitude less efficient than closed impeller wheel drive.
			Figure 32	Symmetric angle-out tube closure cap Potential higher than average rate of high-style impeller Single-stage centrifugal supercharger to the heart Pump	Contains a high potential than the average rate closed impeller radial symmetry pressurized modules and two end caps mold Block, Let L-shaped blades, tangential to the exit, leaves the tail tank accelerating section, the average rate of fork, etc. Structure, with containment relative vortex impeller output gear, low speed into the conduction mechanisms. Its characteristics are: adaptive variable conduction processes running conditions, the pressure coefficient is increased, the potential dynamic than Up to 3 to 9, the deflector loss is reduced an order of magnitude more efficient than the impeller drive semi-open impeller.
Figure 33	Symmetric cover variable angle of tube pre- Closed high spin potential than the average rate Single-stage turbocharger impeller radial Centrifugal pumps	Contains a pre-spin potential than closed impellers are high-speed booster module to the heart and two symmetrical side Cover module, Let L-shaped blades, tangential to the outlet, rear leaf trough acceleration section, the average rate of turnout Road and other structures, has to contain relatively vortex impeller output gear, low speed into the lead, with Step prewhirl mechanisms. Its characteristics are: adaptive variable conditions throughout the run, the pressure coefficient Increase, the potential dynamic ratio of up to 3 to 9, an order of magnitude lower diversion loss, anti-cavitation characteristics of a good.
			Figure 34	Symmetric cover variable angle of the tube Closed-paced high friction force Single turbocharger to the heart than the impeller Stage centrifugal pump	Contains an internal friction are closed impeller speed high potential to the heart than the booster module and two symmetrical Cover module, Let L-shaped leaves, the average rate of fork, tangential to the outlet, rear leaf trough phase For acceleration, gas barrier clearance, front and rear side equalizing chamber communicating hole friction drive two-phase flow Tube structure, with containment relative vortex impeller output deceleration, speed and other machine into the lead The system. Its characteristics are: adaptive variable conduction processes running conditions, the pressure coefficient is increased, the potential Activity ratio of up to 3 to 9, the deflector loss is reduced an order of magnitude less independent of the inner mechanical loss ...

		Contains an internal friction are closed impeller speed high potential to the heart than the booster module and two symmetrical Cover module, Let L-shaped leaves, the average rate of fork, tangential to the outlet, rear leaf trough phase For acceleration, gas barrier clearance, front and rear side equalizing chamber communicating hole friction drive two-phase flow Tube structure, with containment relative vortex impeller output deceleration, speed and other machine into the lead The system. Its characteristics are: adaptive variable conduction processes running conditions, the pressure coefficient is increased, the potential Activity ratio of up to 3 to 9, the deflector loss is reduced an order of magnitude less independent of the inner mechanical loss ...
			Figure 35	Symmetric cover variable angle of the tube Closed antifriction prewhirl average rate High growth potential than the impeller to the heart Pressure single stage centrifugal pumps	Contains an internal friction prerotator high potential than the average rate closed impeller radial supercharger module and two Symmetrical cover module, Let L-shaped leaves, the average rate of fork, tangential to the exit, leaf tail groove Ministry of relative acceleration, gas barrier clearance, front and rear side equalizing chamber communicating hole friction drive two-phase Inflow tube structure, with containment relative vortex impeller output gear, low speed into the lead, Sync pre rotation, friction and other mechanisms. Its characteristics are: adaptive variable conditions throughout the run, Pressure coefficient is increased, anti-cavitation characteristics, potential gear ratio of 3 to 9, diversion loss reduction An order of magnitude, independent of mechanical loss decreases 82% to 95%. ...
Contains an internal friction prerotator high potential than the average rate closed impeller radial supercharger module and two Symmetrical cover module, Let L-shaped leaves, the average rate of fork, tangential to the exit, leaf tail groove Ministry of relative acceleration, gas barrier clearance, front and rear side equalizing chamber communicating hole friction drive two-phase Inflow tube structure, with containment relative vortex impeller output gear, low speed into the lead, Sync pre rotation, friction and other mechanisms. Its characteristics are: adaptive variable conditions throughout the run, Pressure coefficient is increased, anti-cavitation characteristics, potential gear ratio of 3 to 9, diversion loss reduction An order of magnitude, independent of mechanical loss decreases 82% to 95%. ...	Symmetric cover variable angle of tube pre- Closed spin super antifriction average rate High growth potential than the impeller to the heart Pressure single stage centrifugal pumps	Contains a pre-swirl ultra high-speed friction force were closed to the heart than the impeller and two booster module Symmetrical cover module, Let L-shaped leaves, the average rate of fork, tangential to the exit, leaf tail groove Ministry of relative acceleration, gas barrier clearance, impeller cover expansion, reducing friction drive double two-phase flow pipe Other structure, with containment relative vortex impeller output gear, low speed into the lead, synchronous Pre-rotation, friction, friction transfer segment flow mechanisms. Its characteristics are: full adaptive Strain running conditions, the pressure coefficient is increased, anti-cavitation characteristics, potential gear ratio of 3 to 9, Loss of one order of magnitude lower diversion, internal mechanical losses decreased 82% independent ~ 95%, for The transfer loss is further reduced. ...

Contains a pre-swirl ultra high-speed friction force were closed to the heart than the impeller and two booster module Symmetrical cover module, Let L-shaped leaves, the average rate of fork, tangential to the exit, leaf tail groove Ministry of relative acceleration, gas barrier clearance, impeller cover expansion, reducing friction drive double two-phase flow pipe Other structure, with containment relative vortex impeller output gear, low speed into the lead, synchronous Pre-rotation, friction, friction transfer segment flow mechanisms. Its characteristics are: full adaptive Strain running conditions, the pressure coefficient is increased, anti-cavitation characteristics, potential gear ratio of 3 to 9, Loss of one order of magnitude lower diversion, internal mechanical losses decreased 82% independent ~ 95%, for The transfer loss is further reduced. ...

This example is a symmetric cover variable angle of tube semi-open impeller single-stage centrifugal supercharger to the heart, including a semi-open impeller radial growth Pressure module and two variable angle of the pipe end cap module is symmetrical, the former by a semi-open impeller 245, impeller chamber lid 243 and the guide wheel to the heart 247 composition, which were used as the front cover 241 and rear cover 250, by a combination of axial shaft and fasteners.

This example is a symmetric cover variable angle of tube semi-open impeller single-stage centrifugal supercharger to the heart, including a semi-open impeller radial growth Pressure module and two variable angle of the pipe end cap module is symmetrical, the former by a semi-open impeller 245, impeller chamber lid 243 and the guide wheel to the heart 247 composition, which were used as the front cover 241 and rear cover 250, by a combination of axial shaft and fasteners....

Refer to Figure 29, the figure shows the modular combination booster module closed impeller radial centrifugal pump end cap structure and symmetry. Its , The 251 is the front cover and into the tube, 252 is the front cover of the triage center snail Road 253 is the impeller chamber cover 254 of the impeller Flow channel 255 is closed impeller, 256 transfer section flow channel cross section is a guide wheel portion 257 is a guide to the heart with a shell wheel, 258 Is a guide wheel pressurized flow channel 259 is the center of the back cover of the confluence snail Road 260 is the back cover of the tube.

This example is a symmetric angle-out tube lid closed impeller single-stage centrifugal supercharger to the heart, including a semi-open impeller radial supercharger Modules and two variable angle of tube end cap module symmetry, the former by a semi-open impeller 255, impeller chamber lid 253 and the guide wheel 257 to the heart Composition, which were used as the front cover 251 and rear cover 260, by a combination of axial shaft and fasteners.

Variable angle of the tube closed to the heart booster pump is a new single-stage centrifugal pump, with a guide to run adaptive process variable conditions and other special , Suitable for a simple transformation of existing technology centrifugal pump, the main benefit is to reduce the cost and user-friendly installation, but also has More than the semi-open impeller significantly improve the efficiency potential. Constant potential than the output flow impeller, the impeller speed is generally 10 m / s Or so, when the flow channel equivalent diameter is increased impeller speed can be increased.

Refer to Figure 30, the figure gives a modular portfolio antifriction closed impeller radial symmetry pressurized module and the pump end cap Structure. Where 261 is the front cover and into the tube, 262 is the front cover of the triage center snail Road 263 is the front impeller chamber gas barrier Gap 264 is a two-phase flow tube, the impeller chamber cover 265, 266 is a rivet in the front end chamber communicating pressure equalizing hole, the belt 267 Housing to the heart guide wheel 268 is closed impeller, 269 are on the back cover of convergence center snail Road 270 is the back cover of the tube.

This example is a symmetric cover variable angle of pipe friction closed impeller single-stage centrifugal supercharger to the heart, including an anti-friction closed impeller to Heart pressurized modules and two variable angle of the pipe end cap module is symmetrical, the former by a closed impeller 268, impeller chamber lid 265, radial guide Wheel 267 and the barrier gas gap 263, the two-phase flow tube 264, a front end chamber 266 communicating the pressure equalizing hole formed, which were used as before Cover 261 and the rear cover 270, through a combination of axial shaft and fasteners.

This example is a symmetric cover variable angle of pipe friction closed impeller single-stage centrifugal supercharger to the heart, including an anti-friction closed impeller to Heart pressurized modules and two variable angle of the pipe end cap module is symmetrical, the former by a closed impeller 268, impeller chamber lid 265, radial guide Wheel 267 and the barrier gas gap 263, the two-phase flow tube 264, a front end chamber 266 communicating the pressure equalizing hole formed, which were used as before Cover 261 and the rear cover 270, through a combination of axial shaft and fasteners....

This example is a symmetric cover variable angle of pipe friction closed impeller single-stage centrifugal supercharger to the heart, including an anti-friction closed impeller to Heart pressurized modules and two variable angle of the pipe end cap module is symmetrical, the former by a closed impeller 268, impeller chamber lid 265, radial guide Wheel 267 and the barrier gas gap 263, the two-phase flow tube 264, a front end chamber 266 communicating the pressure equalizing hole formed, which were used as before Cover 261 and the rear cover 270, through a combination of axial shaft and fasteners....

This example is a symmetric cover variable angle of pipe are semi-open impeller speed high potential to the heart than the booster pump, including a semi-open average rate High potential to the heart than the impeller booster modules and two variable angle of tube end cap module symmetry, the former by a semi-open impeller than the average rate of high potential 274, impeller chamber lid 273, to the heart composed of guide wheel 277, which were used as the front cover and the back cover 280 271 by shafting and tight Firmware axial combination.

This example is a symmetric cover variable angle of pipe are semi-open impeller speed high potential to the heart than the booster pump, including a semi-open average rate High potential to the heart than the impeller booster modules and two variable angle of tube end cap module symmetry, the former by a semi-open impeller than the average rate of high potential 274, impeller chamber lid 273, to the heart composed of guide wheel 277, which were used as the front cover and the back cover 280 271 by shafting and tight Firmware axial combination....

Refer to Figure 32, the figure shows the combination of modular high-speed potential than closed impellers are radial symmetrical cap booster module and centrifugal Pump structure. Where 281 is the front cover and into the tube 282 is split center front cover cochlear Road 283 is the impeller chamber cover, 284 is a high potential than the average rate closed impeller 285 is transferred segment impeller flow channel cross section chamber portion 286 is a cross-section of the flow channel transfer segment Guide wheel part 287 is to the heart with a shell guide wheel, guide wheel 288 is pressurized flow channel 289 is the center of the back cover of the confluence snail Road, 290 is the back cover of the tube.

This example is a symmetric closed cover variable angle of the tube are potential high-speed impeller to the heart than the single-stage centrifugal supercharger, including a closed-average rate High potential to the heart than the impeller booster modules and two variable angle of tube end cap module symmetry, the former by a closed-paced high-potential ratio impeller 284, Impeller chamber cover 283, to the heart of the guide wheel 287 components, which were used as the front cover and the back cover 290 281 through shaft and fasteners Axial combination.

Variable angle of the tube closed high potential boost to the heart than the single-stage centrifugal pump is a new, modular combination design portfolio Symmetric cap, high-potential than the impeller, radial guide wheel three new component technologies. Dynamic than its potential of up to 3 to 9, the pressure coefficient close Theoretical value, an order of magnitude lower diversion losses, guided adaptive variable conditions to run the process, greatly improve its efficiency and superior Semi-open, in the manufacture cost, easy to install and use, it is also has obvious advantages. Its optional impeller speed of 20 m / sec left Right, when the equivalent diameter of the flow channel is increased speed can also be improved.

Refer to Figure 33, the figure shows the combination of modular pre-spin potential than closed impellers are high-speed booster module to the heart and symmetric cover mold Block centrifugal pump structure. Where 291 is the front cover and into the tube 292 is split center front cover cochlear Road, 293 guide shaft Always flow prerotator, 294 is the impeller chamber lid 295 is closed all the high-speed potential than the impeller 296 is a cross-section of the flow channel segment transfer guide wheel Section 297 is to the heart with a shell guide wheel, guide wheel 298 is pressurized flow channel 299 is the center of the back cover of the confluence snail Road, 300 Is the back cover of the tube.

This example is a symmetric angle-out tube lid closed both pre-swirl wheel speed high potential than single-stage centrifugal supercharger to the heart, including a pre-spin off Potential higher than average rate of high-style impeller radial supercharger module and two variable angle of the pipe end cap module symmetry, the former mountain closed-paced high potential leaf Round 295, mounted on the impeller suction chamber prerotator 293, impeller chamber lid 294, to the heart composed of guide wheel 297, which were used as Front cover 291 and the rear cover 300, through a combination of axial shaft and fasteners.

Variable angle of the tube prerotator closed to the heart of the high potential than single-stage booster pump is a new type of centrifugal pump, modular design methods combined Combination of symmetric cap, high-potential than the impeller, radial guide wheel three new component technologies, solutions and add prerotator special impeller inlet Issues. Its potential gear ratio up to 3 to 9, the pressure coefficient is close to the theoretical value, reduced by one order of magnitude loss of diversion, the entire adaptive Variable parameter operation, anti-cavitation characteristics of a good, its efficiency is greatly improved, and low manufacturing cost, easy to install. Its leaves Wheel speeds of up to 20 m / s or so, when the flow channel equivalent diameter greater Shihai can be improved.

Refer to Figure 34, the figure shows the combination of modular high-speed friction-reducing potential than closed impellers are radial symmetry pressurized modules and end caps Centrifugal pump structure. Among them, the 301 is a front cover and into the tube, is the front cover of the shunt 302 center snail Road 303 is a front chamber Less friction air gap 304 is friction driven two-phase flow tube 305 is the impeller chamber cover, front and rear end chamber 306 communicates pressure equalization hole, 307 is a guide to the heart with a shell wheel, 308 is a high potential than the average rate closed impeller 309 is the center of the back cover of the confluence snail Road, 310 Is the back cover of the tube.

This example is a symmetric cover variable angle of pipe friction are closed impeller speed high potential than single-stage centrifugal supercharger to the heart, including an anti-friction Closed impeller than the average rate to the heart of the high potential booster modules and two variable angle of tube end cap module symmetry, the former by a ratio of closed-paced high potential 308 impeller, the impeller chamber lid 305, and 307 to the heart of the guide wheel choke ask gap 303, two-phase flow tube 304, front end chamber pressure equalization hole 306 composition, which were used as the front cover 301 and the rear cover 310 through the shaft and the axial fastener combination.

Variable angle of the pipe friction dosed high potential boost to the heart than the single-stage centrifugal pump is a new, modular design methods combined Combination of symmetric cap, high-potential than the impeller, radial guide wheel three new component technologies and technical solutions within the configuration friction wheel friction Rub problem. Its potential gear ratio up to 3 to 9, the pressure coefficient is close to the theoretical value, reduced by one order of magnitude loss of diversion, and a flow guide Adaptive variable conditions. Its inner mechanical loss is reduced from 82% to 95%, which restricts the pump efficiency of the three major bottlenecks do not exist, the efficiency Increase by as much as two percent, and low manufacturing cost, easy to install. Roulette wheel speed from its friction loss Constraints, up to 20 m / sec or more, the greater the equivalent diameter of the runner, impeller speed can be selected to be higher, which is particularly suitable for high Head occasion. ...

Variable angle of the pipe friction dosed high potential boost to the heart than the single-stage centrifugal pump is a new, modular design methods combined Combination of symmetric cap, high-potential than the impeller, radial guide wheel three new component technologies and technical solutions within the configuration friction wheel friction Rub problem. Its potential gear ratio up to 3 to 9, the pressure coefficient is close to the theoretical value, reduced by one order of magnitude loss of diversion, and a flow guide Adaptive variable conditions. Its inner mechanical loss is reduced from 82% to 95%, which restricts the pump efficiency of the three major bottlenecks do not exist, the efficiency Increase by as much as two percent, and low manufacturing cost, easy to install. Roulette wheel speed from its friction loss Constraints, up to 20 m / sec or more, the greater the equivalent diameter of the runner, impeller speed can be selected to be higher, which is particularly suitable for high Head occasion. ...

This example is a symmetric cover variable angle of pipe friction prerotator are closed impeller speed high potential than single-stage centrifugal supercharger to the heart, including a Antifriction prewhirl are closed impeller speed high potential to the heart than the booster module and two variable angle of the pipe end cap module symmetry, both former by the closed High-speed potential than the impeller 318, impeller chamber lid 315, radial guide rollers 317, 312 and prerotator choke gap 313, two-phase flow pipe 314, front end chamber pressure equalizing hole 316 formed, which were used as the front cover 311 and the rear cover 320 through the shaft and the axial fastening Combination.

Variable angle of the pipe friction prerotator closed to the heart than the high potential of single-stage booster pump is a new type of centrifugal pump, modular combination of design Method combines symmetrical cap, high-potential than the impeller, radial guide wheel three new component technologies and technical solutions within the configuration friction wheel Disc friction problem, configure prerotator solve the problem impeller inlet characteristics. Its potential gear ratio up to 3 to 9, the pressure coefficient is close to the theoretical value, An order of magnitude lower diversion losses and has particularly valuable adaptive variable condition throughout. Its inner mechanical loss is reduced from 82% to 95%, restricting the pump efficiency of the three major bottlenecks do not exist, efficiency rate of up to two percent, efficiency characteristic curve full Face up, anti-cavitation characteristics to achieve an idealized state, and low manufacturing cost, easy to install. Impeller speed from its wheel Restricting disc friction loss, up to 20 m / sec or more, the greater the equivalent diameter of the runner, impeller speed can be selected to be higher, general suitable Various applications. ...

Variable angle of the pipe friction prerotator closed to the heart than the high potential of single-stage booster pump is a new type of centrifugal pump, modular combination of design Method combines symmetrical cap, high-potential than the impeller, radial guide wheel three new component technologies and technical solutions within the configuration friction wheel Disc friction problem, configure prerotator solve the problem impeller inlet characteristics. Its potential gear ratio up to 3 to 9, the pressure coefficient is close to the theoretical value, An order of magnitude lower diversion losses and has particularly valuable adaptive variable condition throughout. Its inner mechanical loss is reduced from 82% to 95%, restricting the pump efficiency of the three major bottlenecks do not exist, efficiency rate of up to two percent, efficiency characteristic curve full Face up, anti-cavitation characteristics to achieve an idealized state, and low manufacturing cost, easy to install. Impeller speed from its wheel Restricting disc friction loss, up to 20 m / sec or more, the greater the equivalent diameter of the runner, impeller speed can be selected to be higher, general suitable Various applications. ...

This example is a symmetric cover variable angle of pipe friction prerotator ultra-paced high-potential than closed impeller centrifugal supercharger to the heart, including a super- Antifriction prewhirl are closed impeller speed high potential to the heart than the booster module and two variable angle of the pipe end cap module symmetry, the former mountain with delay Coated transfer segment extending flow channel closed impeller cover 326 are high-speed potential than the impeller 327, impeller chamber lid 325, to the heart of the guide wheel 329, Prerotator 322 and 323 gas barrier clearance, the front chamber two-phase flow tube 324, rear cavity composed of two-phase flow tube 328, which points Do not be used as the front cover and the back cover 330 321, through a combination of axial shaft and fasteners.

Variable angle of friction tube super high potential prerotator closed to the heart than the single-stage booster pump is a new type of centrifugal pump, modular design portfolio Meter method combines symmetrical cap, high-potential than the impeller, radial guide wheel three new component technologies, and configure ultra-antifriction technology solutions Problems and reduce the friction wheel shift segment flow friction losses, the configuration prerotator impeller inlet characteristics to solve the problem. Its potential dynamic ratio Up to 3 to 9, the pressure coefficient is close to the theoretical value, an order of magnitude lower diversion loss, and has a particularly valuable throughout the variable conditions apply Should sex. The inner mechanical loss is reduced from 82% to 95% of the pump efficiency constraints do not exist in the three bottlenecks, the amplitude efficiency Degrees maximum efficiency characteristic curve overall rise, anti-cavitation characteristics to achieve the ideal state, and the manufacturing cost is not high, install and use Very convenient. Its impeller speed from the wheel friction loss constraints, and constraints into the conduction velocity will be reduced accordingly, and thus has the highest Impeller speed limit, the greater the flow channel equivalent diameter, the higher the impeller speed optional. The pump P for various applications. ...

Variable angle of friction tube super high potential prerotator closed to the heart than the single-stage booster pump is a new type of centrifugal pump, modular design portfolio Meter method combines symmetrical cap, high-potential than the impeller, radial guide wheel three new component technologies, and configure ultra-antifriction technology solutions Problems and reduce the friction wheel shift segment flow friction losses, the configuration prerotator impeller inlet characteristics to solve the problem. Its potential dynamic ratio Up to 3 to 9, the pressure coefficient is close to the theoretical value, an order of magnitude lower diversion loss, and has a particularly valuable throughout the variable conditions apply Should sex. The inner mechanical loss is reduced from 82% to 95% of the pump efficiency constraints do not exist in the three bottlenecks, the amplitude efficiency Degrees maximum efficiency characteristic curve overall rise, anti-cavitation characteristics to achieve the ideal state, and the manufacturing cost is not high, install and use Very convenient. Its impeller speed from the wheel friction loss constraints, and constraints into the conduction velocity will be reduced accordingly, and thus has the highest Impeller speed limit, the greater the flow channel equivalent diameter, the higher the impeller speed optional. The pump P for various applications. ...

Multistage centrifugal supercharger to the heart to the heart booster module includes a plurality of, as shown in Figure 19 to 27 give some examples of possible Module, different modules having different characteristics, their technical principles of the impeller, structure, process the differences and diameter And axial positioning of the Mouth, moving with the gap, the transfer segment synthesis Qian Wenyi flow channel cross section are described in detail. As to the heart booster Module assembly structure and flow parameters on the spatial periodicity, this module has the shaft of a general or specific structural constraints Around the degree of axial tandem within the limits of the valuable properties. This is the modular construction principle of multi-stage pump foundation and limitations.

Multistage centrifugal supercharger to the heart to the heart booster module includes a plurality of, as shown in Figure 19 to 27 give some examples of possible Module, different modules having different characteristics, their technical principles of the impeller, structure, process the differences and diameter And axial positioning of the Mouth, moving with the gap, the transfer segment synthesis Qian Wenyi flow channel cross section are described in detail. As to the heart booster Module assembly structure and flow parameters on the spatial periodicity, this module has the shaft of a general or specific structural constraints Around the degree of axial tandem within the limits of the valuable properties. This is the modular construction principle of multi-stage pump foundation and limitations....

There Based on this, the present invention multistage centrifugal modular combination of specific programs are: contains two symmetrically angularly out tube cap Up to 64 modules and a plurality of radial supercharger module, both modules based on the corresponding sub-specifications each with full interchangeability, or Specifications are based on the corresponding parent table look-up inspection by the media, maximum speed, maximum temperature, maximum pressure and other parameters interchangeability established Maximum pressure which is axially segmented interchangeability or established, in accordance with the "axis of the annular flow from the mouth with a ring near the amount of inflow and outflow." Connection mode, the module will be divided into symmetrical front and rear cover cap, the heart will turn axial tandem booster module, all modules axial group Together, constitute the symmetry with interchangeable modules cover variable angle tube to the heart of the multistage centrifugal supercharger, the combination refers to the design of the connection Cooperation, production assembly and use of the repair, interchangeability cover these procedures. ...

There Based on this, the present invention multistage centrifugal modular combination of specific programs are: contains two symmetrically angularly out tube cap Up to 64 modules and a plurality of radial supercharger module, both modules based on the corresponding sub-specifications each with full interchangeability, or Specifications are based on the corresponding parent table look-up inspection by the media, maximum speed, maximum temperature, maximum pressure and other parameters interchangeability established Maximum pressure which is axially segmented interchangeability or established, in accordance with the "axis of the annular flow from the mouth with a ring near the amount of inflow and outflow." Connection mode, the module will be divided into symmetrical front and rear cover cap, the heart will turn axial tandem booster module, all modules axial group Together, constitute the symmetry with interchangeable modules cover variable angle tube to the heart of the multistage centrifugal supercharger, the combination refers to the design of the connection Cooperation, production assembly and use of the repair, interchangeability cover these procedures. ...

In the production or repair the heart booster module to the guide wheel, impeller and impeller chamber cover assembled in order, respectively, through the three Housing spigot, shaft and the impeller chamber positioning guide wheel, or have other accessories at their specific location await assembly. Removal Procedure The opposite.

Multi-stage pump is running, flow from the inlet pipe to stabilize the flow rate into the center of the front cover cochlear tract, in which the constraints into the wall by Circulation generated three-dimensional motion, from nearly circular orifice outflow axis, this is the front section of the boundary process. Shunt flow into the first one enabling Modules each impeller, which functions to accept the normal force along the blade and integral centrifugal acceleration ratio increased work capacity, then the transferred Section flow channel into the guide wheel, in which the deceleration pressurized, turn 90 degrees from the axis of the annular outlet near the amount of outflow belt loop, this is the first one endowed Energy cycle. In addition to the static pressure of the accumulation and transfer, the flow into and out of the first two enabling modules, and have moved into and streaming The first three of the series, ...... n th ...... until the last one flow regime enabling the module parameters are periodically repeated, including Including inlet and outlet with a circulation shunt circulation convergence process with the cyclical nature of these repeated cycles constitute a multi-stage forming processes Segments. Flow from the confluence of the final stage enabling the module into the rear center snail Road, bound by the three-dimensional wall finishing conversion component to stabilize the flow Quick kiss whip hose outflow from, this is the back-end process segment boundary. ...

Multi-stage pump is running, flow from the inlet pipe to stabilize the flow rate into the center of the front cover cochlear tract, in which the constraints into the wall by Circulation generated three-dimensional motion, from nearly circular orifice outflow axis, this is the front section of the boundary process. Shunt flow into the first one enabling Modules each impeller, which functions to accept the normal force along the blade and integral centrifugal acceleration ratio increased work capacity, then the transferred Section flow channel into the guide wheel, in which the deceleration pressurized, turn 90 degrees from the axis of the annular outlet near the amount of outflow belt loop, this is the first one endowed Energy cycle. In addition to the static pressure of the accumulation and transfer, the flow into and out of the first two enabling modules, and have moved into and streaming The first three of the series, ...... n th ...... until the last one flow regime enabling the module parameters are periodically repeated, including Including inlet and outlet with a circulation shunt circulation convergence process with the cyclical nature of these repeated cycles constitute a multi-stage forming processes Segments. Flow from the confluence of the final stage enabling the module into the rear center snail Road, bound by the three-dimensional wall finishing conversion component to stabilize the flow Quick kiss whip hose outflow from, this is the back-end process segment boundary. ...

1, the whole conservative ring volume levels to reduce the load module diversion, time and spatial variation rate decreases, the flow field, good stability, Plus the advantages of multi-stage gear pump, all levels of diversion and thus loss while significantly reduced.

2, shunt modules, the bus constraint condition improved, with multi-speed advantages, the local loss will be reduced or eliminated, Its adaptability to variable conditions, anti-cavitation characteristics are also improved due to deceleration.

3, the average rate for the use of high-potential pre-swirl ratio impeller modules that due to constraints throughout complete the multi-stage pump will have the highest Hydraulic efficiency and adaptability of the full variable conditions, the entire hydraulic losses along the way are pure loss mode, in a certain progression Range, this loss will decrease with the increase of progression.

Prewhirl high potential than the average rate charged to the heart along the multi-stage pump losses are analyzed as follows: Let Ye flow velocity does not change with progression of change, then level Impeller drive is inversely proportional to the square root of loss and progression, and thus loss and progression throughout the impeller is proportional to the square root. Because class diversion Cheng loss and into the conduction velocity is proportional to the third power which is inversely proportional with the progression of 1.5, then the whole diversion loss and progression Inversely proportional to the square root. And if the leaves into the guide groove faster than the speed of an order of magnitude, the impeller drive flow loss, conduction loss ratio Two orders of magnitude smaller. Since various types of losses are included progression throughout the multiplication factor, and thus the full loss of multi-stage pump for single-stage Seeking normalized ratio pump can be applied when leaf ratio between conduction losses as weighting factors, reuse level loss and progression of the relationship, Multi-stage pump can be obtained in a single stage pump normalizing the full loss ratio, for example the calculated results are shown in Table 13. ...

Prewhirl high potential than the average rate charged to the heart along the multi-stage pump losses are analyzed as follows: Let Ye flow velocity does not change with progression of change, then level Impeller drive is inversely proportional to the square root of loss and progression, and thus loss and progression throughout the impeller is proportional to the square root. Because class diversion Cheng loss and into the conduction velocity is proportional to the third power which is inversely proportional with the progression of 1.5, then the whole diversion loss and progression Inversely proportional to the square root. And if the leaves into the guide groove faster than the speed of an order of magnitude, the impeller drive flow loss, conduction loss ratio Two orders of magnitude smaller. Since various types of losses are included progression throughout the multiplication factor, and thus the full loss of multi-stage pump for single-stage Seeking normalized ratio pump can be applied when leaf ratio between conduction losses as weighting factors, reuse level loss and progression of the relationship, Multi-stage pump can be obtained in a single stage pump normalizing the full loss ratio, for example the calculated results are shown in Table 13. ...

Centrifugal pump series	1	2	4	8	16	32	64
								Impeller Cheng loss ratio	1.000	1.414	2.000	2.828	4.000	5.657	8.000
Grade conduction process loss ratio	1.000	0.707	0.500	0.354	0.250	0.177	0.125
								Full loss ratio	1.000	0.721	0.530	0.403	0.325	0.287	0.283

Increment can improve efficiency, which is a multi-stage pump advantage. However, if the flow rate is not low enough leaf slot, full loss ratio Concave function of the minimum point corresponding to a smaller number of stages, the potential for improved efficiency will not be more than an order of magnitude.

4, using the internal friction wheel, its internal efficiency and total efficiency will be more than 5-9% of the rate and close to its upper limit, The upper limit is compared in terms of a single-stage pump. Than during the multi-stage pump itself, the friction reduction efficiency limit will decrease the speed of the impeller Reduced, and the impeller speed and the wheel diameter requirements are inversely proportional to the square root of the number of stages, and thus within the antifriction techniques for multi-stage pump Benefits will not have a single-stage pump less significant.

From the efficiency, cost and other factors the Panel to consider the value of the modular combination multistage centrifugal common features and advantages are:

1, to the heart booster modules are interchangeable with each other and with the boundary normative connections between modules, which lead to the heart booster Flow structures smallest, lowest cost, and efficiency is higher.

2, the symmetry module has a front cover, a single multi-level inter-related versatility and interchangeability of modules forming having The connection between the normative, with variable angle of installation ease of use, than the conventional case, the volume is greatly reduced, manufacturing Costs and thus lower its adaptation to a wide range of efficiency is higher.

3, on the whole, based on the above normative connection module interchangeability, versatility, design directly reflects or latent The ground contains a combination of modular approach brings the design, manufacture and use of the technical and economic benefits, including reduced workload Shorten the construction period, increasing convenience, simplify product lines and materials, accessories type specifications, reducing normative technical barriers to accelerating technological and Material flow, multi-factor to reduce costs, and so on.

Symmetric cover variable angle of tube multistage centrifugal supercharger to the heart of the differences between the characteristics of different technologies instances, the performance difference with single-stage pump base The same, "marked characteristic centrifugal Name" and "personality technical characteristics and their effects and instructions marked" column names and contents Most of the same, but with different content key, to facilitate search and comparison, still redundant column description in Table 12.

Table 12 symmetrical cover variable angle of tube multistage centrifugal supercharger to the heart of the personality characteristics and their effects described in Table

Drawing No.	Marked characteristics Centrifugal full name	Technical characteristics and personality and instructions marked effect (The innovative feature or features contained in the innovative combination of traditional, resulting in a positive effect)
			Figure 37	Symmetric cover variable angle of tube half Open impeller radial supercharger Multistage centrifugal pump	Containing multiple semi-open impeller booster module to the heart, the impeller flow guide than potential output normally. Its characteristics are: adaptive variable conduction processes running conditions, diversion efficiency, but less than High potential than flow, process efficiency is lower than the impeller closed impeller.
Figure 38	Figure 38...	Figure 38...
			Figure 39	Symmetric cover variable angle of the tube Closed impeller radial antifriction Multistage centrifugal supercharger	Contain multiple closed impeller radial antifriction booster module, set choke gap, front and rear end Equalizing chamber communicating hole friction drive two-phase flow tube structure, with internal friction mechanism. Its characteristics are: adaptive variable conduction processes running conditions, diversion efficiency, but less than High potential than liquid flow, internal efficiency to the limit.

Figure 40	Symmetric cover variable angle of tube half Average rate high potential open leaf Round off to the heart of multi-stage booster Heart Pump	Both contain multiple semi-open impeller speed high potential to the heart than the pressurized module, Let L-shaped blades, Tangential to the exit and leaves the tail tank accelerating section, the average rate of fork and other structures, with containment phase On vortex impeller output gear, low speed into the conduction mechanisms. Its characteristics are: Lead Process Adaptive Variable running conditions, the pressure coefficient is increased, the potential dynamic ratio of up to 3 to 9, diversion loss Consumption decreased by an order of magnitude lower than the closed impeller impeller process efficiency.
			Figure 41	Symmetric angle-out tube closure cap Potential higher than average rate of high-style impeller Multistage centrifugal supercharger to the heart Pump	Contains more than the average rate of the high potential to the heart than the closed impeller booster module, Let L-shaped blades, anti- Tangential outlet, rear leaf trough acceleration section, the average rate of fork and other structures, has to contain a relatively Vortex impeller output gear, low speed into the conduction mechanisms. Its characteristics are: conduction process from Adapt to different work conditions, the pressure coefficient is increased, the potential dynamic ratio of up to 3 to 9, diversion loss Reduce an order of magnitude more efficient than the impeller drive semi-open impeller.
Figure 42	Symmetric cover variable angle of tube pre- Closed high spin potential than the average rate Multistage impeller radial supercharger Centrifugal pumps	Symmetric cover variable angle of tube pre- Closed high spin potential than the average rate Multistage impeller radial supercharger Centrifugal pumps...
			Symmetric cover variable angle of tube pre- Closed high spin potential than the average rate Multistage impeller radial supercharger Centrifugal pumps...	Symmetric cover variable angle of the tube Closed-paced high friction force Pressurized to the heart more than the impeller Stage centrifugal pump	Contain multiple high-speed friction force were closed to the heart than the impeller booster module, let L-shaped leaves Tablets, the average rate of fork, tangential to the outlet, rear leaf trough relative acceleration, gas barrier gap, Front and rear side equalizing chamber communicating hole friction drive two-phase flow tube structure, with containment Relative vortex impeller output decelerated speed into the conduction mechanisms. Its characteristics are: diversion Cheng adaptive variable running conditions, the pressure coefficient is increased, the potential dynamic ratio of up to 3 to 9, diversion Loss of one order of magnitude, reducing mechanical losses within the 82% to 95%. ...
Contain multiple high-speed friction force were closed to the heart than the impeller booster module, let L-shaped leaves Tablets, the average rate of fork, tangential to the outlet, rear leaf trough relative acceleration, gas barrier gap, Front and rear side equalizing chamber communicating hole friction drive two-phase flow tube structure, with containment Relative vortex impeller output decelerated speed into the conduction mechanisms. Its characteristics are: diversion Cheng adaptive variable running conditions, the pressure coefficient is increased, the potential dynamic ratio of up to 3 to 9, diversion Loss of one order of magnitude, reducing mechanical losses within the 82% to 95%. ...	Symmetric cover variable angle of the tube Closed antifriction prewhirl average rate High growth potential than the impeller to the heart Pressure multistage centrifugal pump	Contain multiple antifriction prerotator potential than closed impellers are high-speed booster module to the heart, let L Shaped leaves, the average rate of fork, tangential to the outlet, rear leaf trough relative acceleration, gas barrier between Gap, both front and rear side pressure chamber communicating hole friction drive two-phase flow tube structure, with Containment relative vortex impeller output gear, low speed into the lead, synchronous pre-rotation, antifriction And other mechanisms. Its characteristics are: adaptive variable conditions throughout the run, the pressure coefficient is increased, Anti-cavitation characteristics, potential dynamic ratio of up to 3 to 9, the deflector loss of one order of magnitude, Reducing mechanical losses within the 82% to 95%. ...
			Contain multiple antifriction prerotator potential than closed impellers are high-speed booster module to the heart, let L Shaped leaves, the average rate of fork, tangential to the outlet, rear leaf trough relative acceleration, gas barrier between Gap, both front and rear side pressure chamber communicating hole friction drive two-phase flow tube structure, with Containment relative vortex impeller output gear, low speed into the lead, synchronous pre-rotation, antifriction And other mechanisms. Its characteristics are: adaptive variable conditions throughout the run, the pressure coefficient is increased, Anti-cavitation characteristics, potential dynamic ratio of up to 3 to 9, the deflector loss of one order of magnitude, Reducing mechanical losses within the 82% to 95%. ...	Symmetric cover variable angle of tube pre- Closed impeller rotating ultra-antifriction The average rate of increase to the heart than the high potential Pressure multistage centrifugal pump	Contains several pre-spin super-high-speed friction are closed radial impeller potential than the booster module, let L Shaped leaves, the average rate of fork, tangential to the outlet, rear leaf trough relative acceleration, gas barrier between Gap, impeller cover extensions antifriction drive double two-phase flow tube structure, with containment phase On vortex impeller output gear, low speed into the lead, synchronous pre-rotation, friction, transfer Duan flow friction mechanisms. Its characteristics are: adaptive variable conditions throughout the run, the pressure Coefficient is increased, anti-cavitation characteristics, potential gear ratio up to 3 to 9, a diversion loss reduction ...

		Contains several pre-spin super-high-speed friction are closed radial impeller potential than the booster module, let L Shaped leaves, the average rate of fork, tangential to the outlet, rear leaf trough relative acceleration, gas barrier between Gap, impeller cover extensions antifriction drive double two-phase flow tube structure, with containment phase On vortex impeller output gear, low speed into the lead, synchronous pre-rotation, friction, transfer Duan flow friction mechanisms. Its characteristics are: adaptive variable conditions throughout the run, the pressure Coefficient is increased, anti-cavitation characteristics, potential gear ratio up to 3 to 9, a diversion loss reduction ...
			Figure 46	Symmetric cover variable angle of tube pre- Spin pairs are semi-open high-speed Potential than the multi-stage booster to the heart Centrifugal pumps	Contains more than the average rate of the pre-swirl ratio of high potential semi-open and semi-open impeller consisting of the guide wheel Heart booster module, Let L-shaped leaves, the average rate of fork, tangential to the outlet, rear leaf groove Relative acceleration, simultaneous radial prerotator other structure, with containment relative vortex impeller Output deceleration, speed into conduction, synchronization mechanisms such as pre-spin. Its characteristics are: full adaptive Strain running conditions, the pressure coefficient is increased, anti-cavitation characteristics, potential gear ratio up to 3 ~ 9, an order of magnitude lower diversion loss, internal loss is reduced, the structure is extremely simple and so on. ...

Contains more than the average rate of the pre-swirl ratio of high potential semi-open and semi-open impeller consisting of the guide wheel Heart booster module, Let L-shaped leaves, the average rate of fork, tangential to the outlet, rear leaf groove Relative acceleration, simultaneous radial prerotator other structure, with containment relative vortex impeller Output deceleration, speed into conduction, synchronization mechanisms such as pre-spin. Its characteristics are: full adaptive Strain running conditions, the pressure coefficient is increased, anti-cavitation characteristics, potential gear ratio up to 3 ~ 9, an order of magnitude lower diversion loss, internal loss is reduced, the structure is extremely simple and so on. ...

This example is a symmetric cover variable angle of tube semi-open impeller multistage centrifugal supercharger to the heart, including a maximum of 64 more than half of Open impeller radial supercharger module and two variable angle of tube end cap module symmetry, the former by a semi-open impeller 334, impeller chamber cover Guide wheels 333 and 335 to the heart composition, which were used as the front cover and the back cover 340 332 through the shaft and fasteners connection combinations.

Variable angle of the tube to the heart of semi-open multi-stage booster pump is a new type of centrifugal pump, with a guide to run adaptive process variable conditions and other special , Suitable for a simple transformation of existing technology centrifugal pump, the main benefit is to reduce the cost and user-friendly installation, but also has The potential to improve efficiency. Its access tube angle variable characteristics can make the centrifugal type system specifications greatly reduced. Its impeller output Constant potential than the flow, the impeller speed is generally 10 m / s or so, when the equivalent diameter of the flow channel is increased impeller speed can be increased. Multi-stage pump head and Series proportional increment can achieve high lift. For a given head and flow requirements, The mathematical programming modules can reduce the user's total cost of ownership. ...

Variable angle of the tube to the heart of semi-open multi-stage booster pump is a new type of centrifugal pump, with a guide to run adaptive process variable conditions and other special , Suitable for a simple transformation of existing technology centrifugal pump, the main benefit is to reduce the cost and user-friendly installation, but also has The potential to improve efficiency. Its access tube angle variable characteristics can make the centrifugal type system specifications greatly reduced. Its impeller output Constant potential than the flow, the impeller speed is generally 10 m / s or so, when the equivalent diameter of the flow channel is increased impeller speed can be increased. Multi-stage pump head and Series proportional increment can achieve high lift. For a given head and flow requirements, The mathematical programming modules can reduce the user's total cost of ownership. ...

This example is a symmetric angle-out tube lid closed impeller multistage centrifugal supercharger to the heart, including up to 64 multiple closed Radial impeller booster modules and two variable angle of tube end cap module symmetry, the former by a closed impeller 344, 343 and the impeller chamber cover Composed of guide wheel 345 to the heart, which were used as the front cover and the back cover 349 342 by shafting and fasteners combinations.

Variable angle of the tube closed to the heart booster pump is a new multi-stage centrifugal pump, with a guide to run the process variable condition adaptability valuable Properties, suitable for a simple transformation of existing technology centrifugal pump, the main benefit is to reduce the cost and user-friendly installation, while a Have the potential to improve efficiency, and efficiency is superior to semi-open. Its access tube angle variable characteristics can make the centrifugal type line regulation Grid greatly reduced. Constant potential than the output flow impeller, the impeller speed is generally 10 m / s or so, when the equivalent diameter of the flow channel Increase the rotor speed can be increased. Multi-stage pump head and Series proportional increment can achieve high lift. To In the head and flow requirements determined by mathematical programming modules can reduce the user's total cost of ownership. ...

Variable angle of the tube closed to the heart booster pump is a new multi-stage centrifugal pump, with a guide to run the process variable condition adaptability valuable Properties, suitable for a simple transformation of existing technology centrifugal pump, the main benefit is to reduce the cost and user-friendly installation, while a Have the potential to improve efficiency, and efficiency is superior to semi-open. Its access tube angle variable characteristics can make the centrifugal type line regulation Grid greatly reduced. Constant potential than the output flow impeller, the impeller speed is generally 10 m / s or so, when the equivalent diameter of the flow channel Increase the rotor speed can be increased. Multi-stage pump head and Series proportional increment can achieve high lift. To In the head and flow requirements determined by mathematical programming modules can reduce the user's total cost of ownership. ...

This example is a symmetric angle-out tube lid closed impeller radial antifriction multistage centrifugal supercharger, contain up to 64 multiple Antifriction closed impeller radial supercharger module and two variable angle of tube end cap module symmetry, the former by a closed impeller 353, the impeller chamber Cover to the heart of guide rollers 352 and 354 and 355 gas-gap, two-phase flow tube 356, both before and after the end of the pressure chamber communicating hole 358 composition, The latter were used as the front cover and the back cover 349 342 through the shaft and fasteners connection combinations. Wherein the gas barrier gap 355, the second Phase inlet tube 356, front end chamber pressure equalization hole 358 communicating within the anti-friction means constituting level. In the rear chamber of the multi-stage pumps without shaft seal knot Configuration, you will drive two-phase flow pipe from the front axis of the cavity near the access and wide blade or the rivet at the center vent issue, Front end chamber to maintain the same pressure, which in certain cases can be saved lines. Its equalizing effect similar to the prior art Equalizing balance hole, but the hole than the liquid equilibrium pressure effects are much more significant, and does not cause any volume loss. ...

Variable angle of the pipe friction closed to the heart booster pump is a new type of multi-stage centrifugal pump having an inner friction thus reducing mechanical losses within 82 ~ 95%, guided process variable parameter operation adaptability valuable properties, suitable for conventional centrifugal simple transformation, mainly Efficiency is to reduce the cost and user-friendly installation also has the potential to improve efficiency, and efficiency is superior to semi-open. Its out Tube angle variable characteristics can make the centrifugal type system specifications greatly reduced. Potential than its normal output flow impeller, the impeller speed is a Generally 10 m / s or so, when the equivalent diameter of the flow channel is increased impeller speed can be increased. Increment can reach very high The head, or increase efficiency. The mathematical programming modules can reduce the user's total cost of ownership. ...

Variable angle of the pipe friction closed to the heart booster pump is a new type of multi-stage centrifugal pump having an inner friction thus reducing mechanical losses within 82 ~ 95%, guided process variable parameter operation adaptability valuable properties, suitable for conventional centrifugal simple transformation, mainly Efficiency is to reduce the cost and user-friendly installation also has the potential to improve efficiency, and efficiency is superior to semi-open. Its out Tube angle variable characteristics can make the centrifugal type system specifications greatly reduced. Potential than its normal output flow impeller, the impeller speed is a Generally 10 m / s or so, when the equivalent diameter of the flow channel is increased impeller speed can be increased. Increment can reach very high The head, or increase efficiency. The mathematical programming modules can reduce the user's total cost of ownership. ...

This example is a symmetric cover variable angle of tube semi-open impeller multistage centrifugal supercharger to the heart, including a maximum of 64 more than half of Open both high-speed impeller to the heart than the potential booster module and two variable angle of tube end cap module symmetry, the former by a semi-open high potential average rate Than 364 impeller, the impeller chamber lid 363 and to the heart composed of guide wheel 365, which were used as the front cover and the back cover 369 362, via Shafting and fasteners combinations.

Variable angle of the tube semi-open high potential boost to the heart than the multi-stage centrifugal pump is a new, modular design methods combined group Together a symmetrical cap, high-potential than the impeller, radial guide wheel three new component technologies. Dynamic than its potential of up to 3 to 9 levels of pressure coefficient Close to the theoretical value, grade diversion loss reduced an order of magnitude, guided adaptive variable conditions to run the process, its efficiency greatly improved, And to reduce manufacturing costs and user installation also has obvious advantages. Its access to convenient tube angle variable characteristics Users to install, you can also make a centrifugal pump type system specifications greatly reduced. Its impeller speed up to 20 m / s or so, when the flow channel when Diameter of the impeller speed is increased when the amount can be increased. Increase the multi-stage pump series can achieve high lift, or to further enhance High efficiency. The mathematical programming modules can reduce the user's total cost of ownership. ...

Variable angle of the tube semi-open high potential boost to the heart than the multi-stage centrifugal pump is a new, modular design methods combined group Together a symmetrical cap, high-potential than the impeller, radial guide wheel three new component technologies. Dynamic than its potential of up to 3 to 9 levels of pressure coefficient Close to the theoretical value, grade diversion loss reduced an order of magnitude, guided adaptive variable conditions to run the process, its efficiency greatly improved, And to reduce manufacturing costs and user installation also has obvious advantages. Its access to convenient tube angle variable characteristics Users to install, you can also make a centrifugal pump type system specifications greatly reduced. Its impeller speed up to 20 m / s or so, when the flow channel when Diameter of the impeller speed is increased when the amount can be increased. Increase the multi-stage pump series can achieve high lift, or to further enhance High efficiency. The mathematical programming modules can reduce the user's total cost of ownership. ...

This example is a symmetric closed cover variable angle of the tube are potential high-speed impeller to the heart than the multistage centrifugal supercharger, contains more than the amount of 64 The more closed than the average rate of high potential radial impeller booster modules and two variable angle of tube end cap module symmetry, the former by a closed-paced High potential than the impeller 374, impeller chamber lid 373 and 375 to the heart of the guide wheel components, which were used as the front cover and the back cover 379 372, By shafting and fasteners combinations.

Variable angle of the tube closed high potential boost to the heart than the multi-stage centrifugal pump is a new, modular combination design portfolio Symmetry end cap, high-potential than the impeller, radial guide wheel three new component technologies. Dynamic than its potential of up to 3 to 9, then level pressure coefficient Near the theoretical value, level one order of magnitude lower diversion loss, guide the process of adaptive variable running conditions, which greatly improved the efficiency, effectiveness Rate As semi-open. In reducing manufacturing costs and user installation also has obvious advantages. Its access tube angle Change the characteristics of user-friendly installation, you can also make a centrifugal pump type system specifications greatly reduced. Its impeller speed up to 20 m / sec left Right, when the equivalent diameter of the flow channel is increased impeller speed can also be improved. Increase the multi-stage pump series can achieve high lift, Or further improve efficiency. The mathematical programming modules can reduce the user's total cost of ownership. ...

Variable angle of the tube closed high potential boost to the heart than the multi-stage centrifugal pump is a new, modular combination design portfolio Symmetry end cap, high-potential than the impeller, radial guide wheel three new component technologies. Dynamic than its potential of up to 3 to 9, then level pressure coefficient Near the theoretical value, level one order of magnitude lower diversion loss, guide the process of adaptive variable running conditions, which greatly improved the efficiency, effectiveness Rate As semi-open. In reducing manufacturing costs and user installation also has obvious advantages. Its access tube angle Change the characteristics of user-friendly installation, you can also make a centrifugal pump type system specifications greatly reduced. Its impeller speed up to 20 m / sec left Right, when the equivalent diameter of the flow channel is increased impeller speed can also be improved. Increase the multi-stage pump series can achieve high lift, Or further improve efficiency. The mathematical programming modules can reduce the user's total cost of ownership. ...

This example is a symmetric angle-out tube lid closed both pre-swirl ratio of impeller speed high potential multistage centrifugal supercharger to the heart, contain up to 64 A plurality of pre-swirl-paced high-potential than closed impeller radial supercharger module and two variable angle of tube end cap module symmetry, the former by the closing Potential higher than average rate of high-style impeller 384, prerotator 386, 383 and impeller chamber lid to the heart of the guide wheel 385 components, which are used as front Rear cover 382 and 389, and through the combination of shaft and fasteners.

Variable angle of the tube closed high potential boost to the heart than the multi-stage centrifugal pump is a new, modular combination design portfolio Symmetric cap, high-potential than the impeller, radial guide wheel three new component technologies. Dynamic than its potential of up to 3 to 9, then level pressure coefficient Near the theoretical value, a level of magnitude diversion loss reduction. Completely eliminate their prerotator impact impeller inlet zone turbulence and cavitation ask Questions, so that the entire process of adaptive variable running conditions, and its efficiency greatly improved. In reducing manufacturing costs and user installation Also has obvious advantages. Its access tube angle variable features user-friendly installation, you can also make a centrifugal pump type system specifications Greatly reduced. Its impeller speed up to 20 m / s or so, when the equivalent diameter of the flow channel is increased impeller speed can also be improved. Increase Cadogan stage pump series can achieve high lift, or to further improve efficiency. The mathematical programming modules can reduce the use User's total cost of ownership. ...

Variable angle of the tube closed high potential boost to the heart than the multi-stage centrifugal pump is a new, modular combination design portfolio Symmetric cap, high-potential than the impeller, radial guide wheel three new component technologies. Dynamic than its potential of up to 3 to 9, then level pressure coefficient Near the theoretical value, a level of magnitude diversion loss reduction. Completely eliminate their prerotator impact impeller inlet zone turbulence and cavitation ask Questions, so that the entire process of adaptive variable running conditions, and its efficiency greatly improved. In reducing manufacturing costs and user installation Also has obvious advantages. Its access tube angle variable features user-friendly installation, you can also make a centrifugal pump type system specifications Greatly reduced. Its impeller speed up to 20 m / s or so, when the equivalent diameter of the flow channel is increased impeller speed can also be improved. Increase Cadogan stage pump series can achieve high lift, or to further improve efficiency. The mathematical programming modules can reduce the use User's total cost of ownership. ...

This example is a symmetric cover variable angle of pipe friction reduction potential than closed impellers are high-speed supercharger to the heart of multi-stage centrifugal pumps, contain up to 64 A plurality of friction than the closed-paced high-potential radial impeller booster modules and two variable angle of the pipe end cap module is symmetrical, the former by the closing Potential higher than average rate of high-style impeller 394, impeller chamber lid 393, to the heart of the guide wheel 395 and choke gap 396, two-phase flow tube 397, the former Rear chamber pressure equalization hole 398 communicating components, which were used as the front cover and the back cover 399 392 by shafting and fasteners group Together. Among them, the gas barrier gap 396, two-phase flow tube 397, both before and after the end of the pressure chamber communicating hole 398 within the anti-friction means constituting level. This structure can save the piping, and there is no volume loss. ...

Variable angle of the pipe friction dosed high potential boost to the heart than the multi-stage centrifugal pump is a new, modular design methods combined Combination of symmetric cap, high-potential than the impeller, radial guide wheel three new component technologies. Dynamic than its potential of up to 3 to 9, grade pressure system Close to the theoretical value of the number, grade diversion loss reduced an order of magnitude, guided adaptive variable processes running conditions, and its efficiency greatly improved. Anti-friction means in the portfolio wheel friction loss is reduced to 82% to 95%, can further improve efficiency. This pump system in reducing Causing the user to install and convenient to use also has obvious advantages, its out of the tube angle variable features user-friendly installation, You can also make a centrifugal pump type system specifications greatly reduced. Its impeller speed up to 20 m / s or so, when the equivalent diameter of the flow channel to increase When the impeller speed can be improved. Increase the multi-stage pump series can achieve high lift, or to further improve efficiency. After Mathematical programming modules can reduce the user's total cost of ownership. ...

Variable angle of the pipe friction dosed high potential boost to the heart than the multi-stage centrifugal pump is a new, modular design methods combined Combination of symmetric cap, high-potential than the impeller, radial guide wheel three new component technologies. Dynamic than its potential of up to 3 to 9, grade pressure system Close to the theoretical value of the number, grade diversion loss reduced an order of magnitude, guided adaptive variable processes running conditions, and its efficiency greatly improved. Anti-friction means in the portfolio wheel friction loss is reduced to 82% to 95%, can further improve efficiency. This pump system in reducing Causing the user to install and convenient to use also has obvious advantages, its out of the tube angle variable features user-friendly installation, You can also make a centrifugal pump type system specifications greatly reduced. Its impeller speed up to 20 m / s or so, when the equivalent diameter of the flow channel to increase When the impeller speed can be improved. Increase the multi-stage pump series can achieve high lift, or to further improve efficiency. After Mathematical programming modules can reduce the user's total cost of ownership. ...

This example is a symmetric cover variable angle of pipe friction prerotator high potential than the average rate closed impeller radial supercharger multistage centrifugal pump with a maximum A plurality of 64 antifriction prerotator closed-paced high potential to the heart than the impeller booster modules and two variable angle of tube end cap module symmetry, The former is a high potential than the average rate closed impeller 406, prerotator 404, impeller chamber lid 403, to the heart of the guide wheel 405 and choke gap 408, Two-phase flow tube 407, a front end chamber 409 communicating the pressure equalizing hole formed, which were used as the front cover 402 and the rear cover 410, by Shafting and fasteners combinations. Wherein the gas barrier gap 408, the two-phase flow tubes 407, 409 constitute a pressure equalizing hole communicating order mode Anti-friction means within the block.

Variable angle of the pipe friction prerotator dosed high potential boost to the heart than the multi-stage centrifugal pump is a new, modular design portfolio Method combines symmetrical cap, high-potential than the impeller, radial guide wheel three new component technologies. Dynamic than its potential of up to 3 to 9, level pressure Coefficient close to the theoretical value, a level of magnitude diversion loss reduction. Less friction means that the portfolio roulette friction loss is reduced 82 % ~ 95%, can further improve efficiency. Combination prerotator completely eliminate the impact impeller inlet zone turbulence and cavitation problems So that the whole process of adaptive variable running conditions. This pump to reduce manufacturing costs and user-friendly installation also has obvious advantages Potential, its characteristics and out tube angle variable user-friendly installation, you can also make a centrifugal pump type system specifications greatly reduced. Its impeller Speed ​​up to 20 m / s or so, when the equivalent diameter of the flow channel is increased impeller speed can also be improved. Increasing the number of stages can be multi-stage pump In order to achieve a high head, or to further improve efficiency. The mathematical programming modules can reduce the user's total cost of ownership. ...

Variable angle of the pipe friction prerotator dosed high potential boost to the heart than the multi-stage centrifugal pump is a new, modular design portfolio Method combines symmetrical cap, high-potential than the impeller, radial guide wheel three new component technologies. Dynamic than its potential of up to 3 to 9, level pressure Coefficient close to the theoretical value, a level of magnitude diversion loss reduction. Less friction means that the portfolio roulette friction loss is reduced 82 % ~ 95%, can further improve efficiency. Combination prerotator completely eliminate the impact impeller inlet zone turbulence and cavitation problems So that the whole process of adaptive variable running conditions. This pump to reduce manufacturing costs and user-friendly installation also has obvious advantages Potential, its characteristics and out tube angle variable user-friendly installation, you can also make a centrifugal pump type system specifications greatly reduced. Its impeller Speed ​​up to 20 m / s or so, when the equivalent diameter of the flow channel is increased impeller speed can also be improved. Increasing the number of stages can be multi-stage pump In order to achieve a high head, or to further improve efficiency. The mathematical programming modules can reduce the user's total cost of ownership. ...

This example is a symmetric cover variable angle of friction tube ultra high speed potential than the average closed impeller multistage centrifugal supercharger to the heart, including a maximum of 64 Multiple ultra-antifriction prerotator closed-paced high potential booster module to the heart than the impeller and two variable angle of tube end cap module symmetry, The former is coated with a transfer segment extending flow channel closed impeller cover 418 are high-speed potential than the impeller 414, prerotator 411, leaves Round chamber lid 413, 415 and to the heart of the guide wheel choke gap 416, the front chamber friction drive two-phase flow tube 417, rear cavity friction drive Move media into the tube 419, the latter having 412 were used as the front cover and the back cover 420 through the shaft and fasteners connection combinations. Its In gas barrier gap 416, two-phase flow tube 417 is a front chamber ultra-friction drive components, reducing friction driving medium rear chamber 419 into the tube Enter the two-phase flow alone or gas driven friction rear chamber. ...

Variable angle of friction tube super high potential prerotator closed to the heart than the booster pump is a new type of multi-stage centrifugal pumps, modular design portfolio Meter method combines symmetrical cap, high-potential than the impeller, radial guide wheel three new component technology, its potential dynamic ratio of up to 3 to 9, grade Close to the theoretical value of the pressure coefficient, level one order of magnitude loss of diversion. Configuring ultra friction technology to solve the problem and reduce the friction wheel Low friction loss transfer flow channel section, so that the wheel friction loss is reduced from 82% to 95%, so that the transfer of the stream in path loss greatly reduced, Can further improve efficiency. Combination prerotator completely eliminate the impact impeller inlet zone turbulence and cavitation problems, make the whole process Adaptive Variable running conditions. This pump to reduce manufacturing costs and user-friendly installation also has obvious advantages, its progress The characteristics of the tube angle variable user-friendly installation, you can also make a centrifugal pump type system specifications greatly reduced. Its impeller speeds of up to 20 m / s or so, when the equivalent diameter of the flow channel is increased impeller speed can also be improved. Increase the multi-stage pump series can reach a very High lift, or further improve efficiency. The mathematical programming modules can reduce the user's total cost of ownership. ...

Variable angle of friction tube super high potential prerotator closed to the heart than the booster pump is a new type of multi-stage centrifugal pumps, modular design portfolio Meter method combines symmetrical cap, high-potential than the impeller, radial guide wheel three new component technology, its potential dynamic ratio of up to 3 to 9, grade Close to the theoretical value of the pressure coefficient, level one order of magnitude loss of diversion. Configuring ultra friction technology to solve the problem and reduce the friction wheel Low friction loss transfer flow channel section, so that the wheel friction loss is reduced from 82% to 95%, so that the transfer of the stream in path loss greatly reduced, Can further improve efficiency. Combination prerotator completely eliminate the impact impeller inlet zone turbulence and cavitation problems, make the whole process Adaptive Variable running conditions. This pump to reduce manufacturing costs and user-friendly installation also has obvious advantages, its progress The characteristics of the tube angle variable user-friendly installation, you can also make a centrifugal pump type system specifications greatly reduced. Its impeller speeds of up to 20 m / s or so, when the equivalent diameter of the flow channel is increased impeller speed can also be improved. Increase the multi-stage pump series can reach a very High lift, or further improve efficiency. The mathematical programming modules can reduce the user's total cost of ownership. ...

This example is a symmetric cover variable angle of tube semi-open impeller multistage centrifugal supercharger to the heart, including a plurality of up to 64 pre- Spin double the average rate of semi-open impellers and high potential to the heart than the pressurized module and two variable angle of the pipe end cap module is symmetrical, the former by a semi-open High potential than the average rate impeller 424, impeller chamber lid 423, semi-open to the heart of the guide wheel 425 and prerotator 428, the latter having respectively 422 for the front cover and the back cover 429 through the shaft and fasteners connection combinations. Among them, prerotator can be used to axial flow, Mounted on the impeller suction chamber, or to switch to radial flow prerotator, mounted on the guide wheel center (heads or do not change, or default, The final stage can be the default). ...

Variable angle of the tube prerotator double semi-open to the heart of multi-stage booster pump prerotator than double the average rate of high potential semi-open wheel module as enabling mold Blocks. The module is only semi-open annular guide wheel of the rear cover a large opening, and circular cylindrical housing as a whole, the blade fastening The rear panel or the overall manufacturing, opening the rear cover, the impeller inlet is formed with a diameter the same cavity axis as wear, Prerotator inhalation and installation space, idler pulley and housing and the shaft is concentrically mounted, the front wheel rear wheel bottom cover shared Surface. Radial stream prerotator comes sleeve, tight fit on the shaft, living guide wheel position in the cavity. Semi-open impeller only The rear wheel side, the blade fastened thereon or on the overall manufacturing the impeller secured to the shaft through the sleeve. Impeller chamber through the front cover Positioned over the guide wheel mounted on the impeller chamber housing front. Sequential series fitted with twin semi-open pressurized module to the heart, the final stage is not installed prerotator. Coupled with the front cover and back cover module, the complete assembly. ...

Variable angle of the tube prerotator double semi-open to the heart of multi-stage booster pump prerotator than double the average rate of high potential semi-open wheel module as enabling mold Blocks. The module is only semi-open annular guide wheel of the rear cover a large opening, and circular cylindrical housing as a whole, the blade fastening The rear panel or the overall manufacturing, opening the rear cover, the impeller inlet is formed with a diameter the same cavity axis as wear, Prerotator inhalation and installation space, idler pulley and housing and the shaft is concentrically mounted, the front wheel rear wheel bottom cover shared Surface. Radial stream prerotator comes sleeve, tight fit on the shaft, living guide wheel position in the cavity. Semi-open impeller only The rear wheel side, the blade fastened thereon or on the overall manufacturing the impeller secured to the shaft through the sleeve. Impeller chamber through the front cover Positioned over the guide wheel mounted on the impeller chamber housing front. Sequential series fitted with twin semi-open pressurized module to the heart, the final stage is not installed prerotator. Coupled with the front cover and back cover module, the complete assembly. ...

Dual semi-open multi-stage pump impeller chamber without end, without friction mechanism. Flow guide channel as the peripheral speed of rotation component, Impeller wheel cover about half of the friction velocity is reduced, which reduces friction losses of about 75%. And, this friction But also on the flow diversion channel to generate incremental angular momentum, which produce dust outside the impeller than reactive. The front cover of the roulette wheel friction Is equal to the prior art, to consider the reduction of friction and the outside back cover specific power gains, the total friction loss compared to existing roulette There are techniques reduced by approximately 40%.

Variable angle of the tube prerotator double semi-open to the heart booster pump is a new type of multi-stage centrifugal pumps, modular design methods combined group Together a symmetrical cap, high-potential than the impeller, radial guide wheel three new component technologies. Dynamic than its potential of up to 3 to 9 levels of pressure coefficient Close to the theoretical value, a level of magnitude diversion loss reduction. Combination prerotator completely eliminate the impact impeller inlet zone turbulence and cavitation Problems, make the whole process of adaptive variable running conditions, and its efficiency greatly improved. This pump to reduce manufacturing costs and user safety Installed and used also has obvious advantages. Its access tube angle variable features user-friendly installation, you can also make the centrifugal type line Specifications greatly reduced. Its impeller speed up to 20 m / s or so, when the equivalent diameter of the flow channel is increased impeller speed can also be improved. Increase the multi-stage pump series can achieve high lift, or to further improve efficiency. ...

Variable angle of the tube prerotator double semi-open to the heart booster pump is a new type of multi-stage centrifugal pumps, modular design methods combined group Together a symmetrical cap, high-potential than the impeller, radial guide wheel three new component technologies. Dynamic than its potential of up to 3 to 9 levels of pressure coefficient Close to the theoretical value, a level of magnitude diversion loss reduction. Combination prerotator completely eliminate the impact impeller inlet zone turbulence and cavitation Problems, make the whole process of adaptive variable running conditions, and its efficiency greatly improved. This pump to reduce manufacturing costs and user safety Installed and used also has obvious advantages. Its access tube angle variable features user-friendly installation, you can also make the centrifugal type line Specifications greatly reduced. Its impeller speed up to 20 m / s or so, when the equivalent diameter of the flow channel is increased impeller speed can also be improved. Increase the multi-stage pump series can achieve high lift, or to further improve efficiency. ...

Claims (57)

1 A centrifugal pump, the impeller, diffuser, housing and shaft components, characterized in that: the impeller end of the flow path groove leaves Tangential to the curved portion and toward the cross-sectional area gradually decreases, the centrifugal force acting on the fluid is accelerated and the end of the path to change direction, the After the relative speed and a larger exit angle close to 0 out of impeller exit absolute velocity is reduced accordingly, steering and acceleration over Reaction torque generated by the drive shaft less successful.

1 A centrifugal pump, the impeller, diffuser, housing and shaft components, characterized in that: the impeller end of the flow path groove leaves Tangential to the curved portion and toward the cross-sectional area gradually decreases, the centrifugal force acting on the fluid is accelerated and the end of the path to change direction, the After the relative speed and a larger exit angle close to 0 out of impeller exit absolute velocity is reduced accordingly, steering and acceleration over Reaction torque generated by the drive shaft less successful....

3 A centrifugal pump, the impeller, diffuser, housing and shaft components, characterized in that: the deflector to the guide wheel to the heart Vortex-shaped flow channel was introverted, radius of curvature and cross-sectional area decreases gradually diverging, converging on the center ring cavity turn 90 degrees axial output.

4 A centrifugal pump modular combination methods, different types and specifications of centrifugal pump using the same specifications enabling components, and its Characteristics: Based on the guide wheel to the heart of the spatial periodicity, according to the amount of near-axis tectonic belt loop leaves the ring port to connect to the guide shaft to the combination Heart booster module, based on the structural properties of symmetric cover, as a ring with a ring of nearly shaft end seal structure port connection module In both modules corresponding to the specifications of each series, the same kind of parent size and specifications of the module assembly and the same basic interface parameters With a look-up table test interchangeability specifications under the same parent seed size and specifications of the module assembly which has the same parameters for all interfaces Complete interchangeability of two interchangeable defined in the single-stage pump, multistage pump, includes a variety of models and different techniques including the use of high-potential ratio Or constant potential than large collection of centrifugal impeller, in the planning and design process defined interchangeability domain, in the design of production after During and after the production process of using interchangeable in the domain of definition established in accordance with the "flow from the near-axis circular mouth with ring volume Into and out of "connection mode, the one or more up to 64 connected in series to the heart with two symmetrical booster module cover module Combination constitutes modular combination or multi-stage pump single stage pump. ...

5, according to claim 1, wherein the centrifugal pump, characterized in that: said impeller outlet is rectangular or circular, the adjacent outlets Angular distance between equals 360 degrees divided by the number of flow, flow export laws surface and perpendicular to the inside edge before an export outlet to the outside after a A smooth connection between the edges involute arc cylindrical or from deep to shallow groove surface, cylindrical or circular cylindrical tank surface and between the impeller Unilateral constrained flow channel cross-sectional area and the central angle into periodic linear relationship with the outlet stream from the distribution cylinder or through the arc groove surface Finishing the Coanda effect, the export of the wheel spacer is formed along the curved inwards uniform flow lines, the radial velocity component and the tangential component Not with the central angle changes, the outlet area of ​​the flow channel and equal to the design and design of export volume flow ratio of the relative velocity, the velocity Peripheral speed of the impeller is equal to the feedback reduction ratio K of the product. ...

5, according to claim 1, wherein the centrifugal pump, characterized in that: said impeller outlet is rectangular or circular, the adjacent outlets Angular distance between equals 360 degrees divided by the number of flow, flow export laws surface and perpendicular to the inside edge before an export outlet to the outside after a A smooth connection between the edges involute arc cylindrical or from deep to shallow groove surface, cylindrical or circular cylindrical tank surface and between the impeller Unilateral constrained flow channel cross-sectional area and the central angle into periodic linear relationship with the outlet stream from the distribution cylinder or through the arc groove surface Finishing the Coanda effect, the export of the wheel spacer is formed along the curved inwards uniform flow lines, the radial velocity component and the tangential component Not with the central angle changes, the outlet area of ​​the flow channel and equal to the design and design of export volume flow ratio of the relative velocity, the velocity Peripheral speed of the impeller is equal to the feedback reduction ratio K of the product. ...

7, according to claim 1 or 5, or 6, wherein the centrifugal pump, characterized in that: the impeller suction chamber or pre-loaded outlet deflector There is a coaxial rotating impeller axial or radial stream adaptive prerotator, prerotator sails by the elastic blade, wheels and just Of ribs, whose leaves are less than the number of impeller blades, blade made of composite material, with gradually increasing from the front to the roots The tensile elastic modulus, is radially fixed to the rim of the mounting position of the angle distribution, the rim freely set in the shaft or leaf Axle sleeve, leaves hanging in front of the entrance to the rigidity of the ribs, formed between the pre-swirl vane channel, wherein the axial stream Prerotator rigidity ribs laid the inlet radial position of the circumferential surface, to flow radially rigid ribs prerotator laid the inlet Parallel to the cylindrical surface of the shaft position. ...

7, according to claim 1 or 5, or 6, wherein the centrifugal pump, characterized in that: the impeller suction chamber or pre-loaded outlet deflector There is a coaxial rotating impeller axial or radial stream adaptive prerotator, prerotator sails by the elastic blade, wheels and just Of ribs, whose leaves are less than the number of impeller blades, blade made of composite material, with gradually increasing from the front to the roots The tensile elastic modulus, is radially fixed to the rim of the mounting position of the angle distribution, the rim freely set in the shaft or leaf Axle sleeve, leaves hanging in front of the entrance to the rigidity of the ribs, formed between the pre-swirl vane channel, wherein the axial stream Prerotator rigidity ribs laid the inlet radial position of the circumferential surface, to flow radially rigid ribs prerotator laid the inlet Parallel to the cylindrical surface of the shaft position. ...

9, according to claim 2, wherein the centrifugal pump, characterized in that: the cavity comprises a friction-reducing end of the inflatable ejector, the ejector Driving pressure liquid from the pump discharge diversion, through the mouth of its ejector valve coherent source or through the atmosphere, and its export from the stationary wall Paraxial Office Access antifriction end chamber, two-phase flow in the cavity separation, gas by centrifugal force field constraint in the radial buoyancy chamber, liquid and Excess gas discharged from the wheel gap along the side deflectors, front chamber through the gap into the suction chamber leak gas barrier gap, or attached with Split two-phase flow from the gas barrier V-ring groove, the installation of two-phase flow lubrication soft ring, or directly with the pressure of the liquid seal, impeller out The mouth of the parietal bus or ejector also made to have the shape of the end of the decompression chamber pressure drops to less static pressure outlet. ...

10, according to claim 2, wherein the centrifugal pump, characterized in that: The pressure of the gas through the valve down cans and regulation Valves regulate the flow, the use of anti-friction piping connected to the stationary end wall of the cavity injection, and a small diversion from the pump outlet flow liquid conduit Mechanical seal chamber and injected directly into the front chamber leakage gap, respectively cooled shaft seal and seal leakage gap, or the pressure canned The buck regulator and gas control valve regulating the flow of air directly into the pump after the exit leads to the return pipe constitutes a two-phase Flow, respectively connected to the rear chamber and the front wall of the cavity still stationary wall of the gas barrier near the gap at the axis, respectively, into the sealed, gas, and Regulating the flow of liquid, respectively, the liquid flow rate control valve connected in series between the return lead from the pump outlet pipe. ...

11, according to claim 3, wherein the centrifugal pump, which is characterized by: Metastasis in turn lead to the heart by the impeller outlet section of the cylinder, Impeller chamber wall surface and the bottom surface of the outer edge of the guide wheel front surface surrounded by its cross-section is divided into the impeller chamber portion and the guide wheel parts, two parts fitted Kiss engagement with one section of the synthesis of the position shift in the direction periodically guide wheel, its cross-sectional area of ​​the central angle with the increasing diversion Periodically increases linearly, the period is equal to a diversion channel corresponding central angle, which increases the scale factor is equal to the impeller turned The volume displacement unit angle design value and the design value of the absolute velocity of fluid outlet, or the ratio is also multiplied by a value greater than 1 and less than Supercharger pulley minimum flow rate of expansion of the expansion coefficients. ...

12, according to claim 3, wherein the centrifugal pump, characterized in that: the center of the vortex tube channel bus angularly symmetrical cap Back and forth axially package, the end cap assembly ended with the mouth by the pressure plate and the center of the cover plate integrated manufacturing structure and connecting pipe Tao, whose central structure including bushings, bushings periphery to the center of cochlear Road, cochlear Road envelope bearing cavity and shaft support hole, Bearing cover bearing surface is flat or open face to the heart of the guide wheel rotation consistent surface, which has a near-axis position with worm Dorian Through the annular opening, the center channel is a radial scroll involute worm axial translation of the three-dimensional road, the beginning of the annular opening plane The tongue, the end of the addition of the radial and axial coordinates of the bottom of the tongue, cochlear channel cross-sectional area of ​​the central angle is proportional to the scale factor Is equal to the angle of the impeller turned volumetric displacement unit and the average flow speed ratio to the opening plane of the reference circle, with cross-sectional area Linear increase, cochlear channel bottom centerline and axial coordinates of the radial coordinate gradually increased, forming a worm bottom slope, turned 360 Degrees into the bottom of the tongue, followed by anastomosis with the pipe, cross-sectional shape of the channel cochlear central angle in tandem with changes in the tongue straight line from the start, First major axis in the plane of the opening on the shorter length axle semi-elliptic, becoming gradually sinking semicircle and smoothly curved lower increase Radius of curvature, along a bearing cavity is sufficient to bypass the rate of change of curvature of the support structure suitable involute arc extends a curved quadrilateral Plus a semicircular shape, until you get to the bottom of the tongue, and then remain deformed cross-sectional area of ​​circular cross-section and the pipe anastomosis. ...

13, according to claim 6, wherein the centrifugal pump, characterized in that: a rotor having a shaft hole (2), sleeve (3), Leaves (5) and leaf trough passage (6) of the semi-open disc-shaped parts, bushings outside is annular suction chamber (4), and its underside or Who is steering the continuous flow surface of revolution, or a plane, the latter type of equipment installed prerotator, prerotator rim surface has a Same shape steering surfaces. Vanes (5) is L-shaped, the former Central radially trend toward tangential to the curved tail, the tail outside Side of the smooth cylindrical involute curve or groove surface, 6 to 12 identical L-shaped blades uniformly distributed on the wheel, during shape Leaves a uniform flow channel groove, the flow channel inlet (7) and the central (6) is more apt to reaching the outlet (8) before the cross-sectional area by Gradually reduced and turned. ...

13, according to claim 6, wherein the centrifugal pump, characterized in that: a rotor having a shaft hole (2), sleeve (3), Leaves (5) and leaf trough passage (6) of the semi-open disc-shaped parts, bushings outside is annular suction chamber (4), and its underside or Who is steering the continuous flow surface of revolution, or a plane, the latter type of equipment installed prerotator, prerotator rim surface has a Same shape steering surfaces. Vanes (5) is L-shaped, the former Central radially trend toward tangential to the curved tail, the tail outside Side of the smooth cylindrical involute curve or groove surface, 6 to 12 identical L-shaped blades uniformly distributed on the wheel, during shape Leaves a uniform flow channel groove, the flow channel inlet (7) and the central (6) is more apt to reaching the outlet (8) before the cross-sectional area by Gradually reduced and turned. ...

15, according to claim 7, wherein the centrifugal pump, characterized in that: the impeller axially with prerotator stream, the two wheels Rings and pieces less than the elastic sail blade impeller composed rim (14) and (15) sleeve bushings on the impeller suction chamber can Rotate independently, kiss each other on the surface connected into the steering flow surface of revolution, sail blade (16) into a curved equilateral triangle, Its lateral side edge of the rigid rib suspension (20), the radial ribs fixed to the impeller blades or the entrance of the front cover, the blade curve Below the bottom edge of the ring and two closest points (18) and (19) respectively fixed to the circumference of the bottom two, when the safety prerotator Mounted on the semi-open impeller (31), the rigidity ribs (34) radially secured to the inlet face of the blade root. ...

15, according to claim 7, wherein the centrifugal pump, characterized in that: the impeller axially with prerotator stream, the two wheels Rings and pieces less than the elastic sail blade impeller composed rim (14) and (15) sleeve bushings on the impeller suction chamber can Rotate independently, kiss each other on the surface connected into the steering flow surface of revolution, sail blade (16) into a curved equilateral triangle, Its lateral side edge of the rigid rib suspension (20), the radial ribs fixed to the impeller blades or the entrance of the front cover, the blade curve Below the bottom edge of the ring and two closest points (18) and (19) respectively fixed to the circumference of the bottom two, when the safety prerotator Mounted on the semi-open impeller (31), the rigidity ribs (34) radially secured to the inlet face of the blade root. ...

17, according to claim 8, wherein the centrifugal pump, characterized in that: a high potential than the impeller member is semi-open, or using The components of the closed structure as the foundation roulette, the wheel along a circular or zigzag-shaped, L-shaped blades on the wheel (36), leaves in front of the trough Department located at the average rate of broad leaf combs (37), the formation of the average rate of the fork (38), (39), former Central comb leaf radial trend was also found to form a bifurcated Road Entrance (41) close to the entrance slot without reach leaves, leaf tail comb smooth steering, pointing in the direction downstream line acceleration leaves groove segment-shaped A fork exports (40) close up leaf trough without outlet, fork exit area from near the pressure side to the suction side near decreasing. ...

17, according to claim 8, wherein the centrifugal pump, characterized in that: a high potential than the impeller member is semi-open, or using The components of the closed structure as the foundation roulette, the wheel along a circular or zigzag-shaped, L-shaped blades on the wheel (36), leaves in front of the trough Department located at the average rate of broad leaf combs (37), the formation of the average rate of the fork (38), (39), former Central comb leaf radial trend was also found to form a bifurcated Road Entrance (41) close to the entrance slot without reach leaves, leaf tail comb smooth steering, pointing in the direction downstream line acceleration leaves groove segment-shaped A fork exports (40) close up leaf trough without outlet, fork exit area from near the pressure side to the suction side near decreasing....

19, according to claim 8 or 17 or 18, wherein the centrifugal pump, characterized in that: the average speed higher potential than the impeller (54), Prerotator (55), mechanical seal (56), with quadratic cochlear channel (52) surfaces of the front cover (58) and rear (59) and suspended Prerotation arm shaft and other components are high-speed potential than the quadratic channel cochlear spiral arm pump.

20, according to claim 2 or 9 or 10, wherein the centrifugal pump, characterized in that: the shaft of the pump, or a ring The cover (68) spaced from the shaft seal chamber is formed axle annular opening (69) communicating with the end chamber, the two-phase flow tube (64) into the seal Chamber, the suction side, or wall located near axis of the annular groove, with the rotation of the impeller into a small ring (74) which was separated Into the top of the far axis V-ring groove, which side gap (72) communicating the front end chamber (71), the other side of the gap (74) communicating the suction chamber, A gas-liquid separation of the V-shaped groove shunt choke gap, two-phase flow tube (75) communicating the gap (72), some of the liquid from the V-shaped groove Into the bottom of the gap (74) returns to the suction chamber (77), the gas in the gap (72) in the shaft at the same floating rose nearly one remaining liquid flows Front chamber (71). ...

20, according to claim 2 or 9 or 10, wherein the centrifugal pump, characterized in that: the shaft of the pump, or a ring The cover (68) spaced from the shaft seal chamber is formed axle annular opening (69) communicating with the end chamber, the two-phase flow tube (64) into the seal Chamber, the suction side, or wall located near axis of the annular groove, with the rotation of the impeller into a small ring (74) which was separated Into the top of the far axis V-ring groove, which side gap (72) communicating the front end chamber (71), the other side of the gap (74) communicating the suction chamber, A gas-liquid separation of the V-shaped groove shunt choke gap, two-phase flow tube (75) communicating the gap (72), some of the liquid from the V-shaped groove Into the bottom of the gap (74) returns to the suction chamber (77), the gas in the gap (72) in the shaft at the same floating rose nearly one remaining liquid flows Front chamber (71). ...

22, according to claim 2 or 9, wherein the centrifugal pump, characterized in that: the inner closed impeller centrifugal friction drive means Liquid by the pressure regulating valve (92), the ejector (90), ejector gas regulating valve (91), flow distribution pipe (87) and (88) And the front chamber gas barrier gap (93) composed of the outlet pressure when the pump impeller output than 0.05MPa or more high static pressure, the pressure Liquid from the outlet diversion leads, output two-phase flow through the flow distribution pipe (88) and (87) controls the front and rear chambers steady flow Volume distribution, where (87) into the seal cavity, cooling the shaft seal (85), the outlet flow from the annular rear end of the cover chamber (88) Access front chamber, the gas barrier gap (93) to prevent escape of gas-gas barrier gap (93) or it is not placed on the V-ring groove Soft ring the same location, with the two-phase flow lubrication. ...

22, according to claim 2 or 9, wherein the centrifugal pump, characterized in that: the inner closed impeller centrifugal friction drive means Liquid by the pressure regulating valve (92), the ejector (90), ejector gas regulating valve (91), flow distribution pipe (87) and (88) And the front chamber gas barrier gap (93) composed of the outlet pressure when the pump impeller output than 0.05MPa or more high static pressure, the pressure Liquid from the outlet diversion leads, output two-phase flow through the flow distribution pipe (88) and (87) controls the front and rear chambers steady flow Volume distribution, where (87) into the seal cavity, cooling the shaft seal (85), the outlet flow from the annular rear end of the cover chamber (88) Access front chamber, the gas barrier gap (93) to prevent escape of gas-gas barrier gap (93) or it is not placed on the V-ring groove Soft ring the same location, with the two-phase flow lubrication. ...

24, according to claim 11, wherein the centrifugal pump, characterized in that: the diversion flow path inlet section off the tongue (118) of the Now the starting and ending point for the tongue central angle of pitch cycle, radial flow channel guide wheel shift segment synthesis-sectional shape and area with the center of the circle Angle changes periodically, and its variation is:

a, cross-sectional area increases linearly, the two parts were separated into two changes from the starting point to the former first-class road booster segment anteroposterior point (117), The impeller chamber part increases linearly from the minimum to the maximum value, the guide wheel part is 0, from that point to the end point, the impeller chamber part from the maximum Linear reduced to the minimum, part of the guide wheel increases linearly from 0 to the maximum;

b, the minimum cross-sectional area equal to the synthetic portion of the impeller chamber minimum occurrence of which is equal to the tongue (118), the curve (119) and impeller bus consisting of cylindrical surface curved edge area of ​​the triangle, the curve (119) consists of two elliptical arcs and the middle section Circular anastomosis is made equal to the maximum cross-sectional area synthesized with a minimum cross-sectional area portion of the guide wheel with the maximum value, which is equal to Synthesis increased cross-sectional area ratio coefficient multiplied with central angle cycle, impeller chamber part cross-sectional area equal to the maximum position the tongue appear (118), the curve (120) and impeller bus constituting the cylindrical surface area of ​​the triangle of the curved edge, the curve (120) is the bus section Maximum marginal surface, consists of two elliptical arcs anastomosis is made by the endpoint coordinates and entrance off periods incremental synthesis of cross-sectional area to determine: ...

b, the minimum cross-sectional area equal to the synthetic portion of the impeller chamber minimum occurrence of which is equal to the tongue (118), the curve (119) and impeller bus consisting of cylindrical surface curved edge area of ​​the triangle, the curve (119) consists of two elliptical arcs and the middle section Circular anastomosis is made equal to the maximum cross-sectional area synthesized with a minimum cross-sectional area portion of the guide wheel with the maximum value, which is equal to Synthesis increased cross-sectional area ratio coefficient multiplied with central angle cycle, impeller chamber part cross-sectional area equal to the maximum position the tongue appear (118), the curve (120) and impeller bus constituting the cylindrical surface area of ​​the triangle of the curved edge, the curve (120) is the bus section Maximum marginal surface, consists of two elliptical arcs anastomosis is made by the endpoint coordinates and entrance off periods incremental synthesis of cross-sectional area to determine: ...

d, a booster section, the marginal line (116) and (118) to continue the forward movement and deformation, the minimum material forming the tongue After reasonable width, rear lateral marginal line from the front of the tongue to the marginal line segments separated into backward bending of long semi-elliptical, short axle is rising, as Semicircular later changed to pan, move the runner underside (117) only, also continuous forward semicircle before, go to the bottom surface (115) is tangent When compressed to a continuous length of semi-elliptical, and finally into a straight line, the section forward during deformation, cross-sectional area required by slow pressurization Expansion, the radial coordinate of the center line or is changed.

25, according to claim 11, wherein the centrifugal pump, characterized in that: the guide wheel to the heart of the circumferential wall has a guide vane anastomosis Variable curvature starting point is after the transfer of the pressurized flow channel anteroposterior point, by that point decided to shift the center of the radial flow channel segment to sit Standard, the transfer section of the flow path cross-section into the impeller chamber portion and the guide wheel parts, two parts assembled kiss engage one section of the impeller chamber portion Impeller cover is wrapped in the impeller, with a fixed size and shape of the axial velocity component assumed by the steering adjustment section Part of the two guide rollers between the tongue section adjacent the impeller chamber space communicating cross-section, the cross-sectional convergence of independent control And tangential and axial movement, with the central angle of diversion increases, partly in cross-section of the guide wheel for the start and end of the tongue cycle Resistance to change, the variation within a cycle are: ...

25, according to claim 11, wherein the centrifugal pump, characterized in that: the guide wheel to the heart of the circumferential wall has a guide vane anastomosis Variable curvature starting point is after the transfer of the pressurized flow channel anteroposterior point, by that point decided to shift the center of the radial flow channel segment to sit Standard, the transfer section of the flow path cross-section into the impeller chamber portion and the guide wheel parts, two parts assembled kiss engage one section of the impeller chamber portion Impeller cover is wrapped in the impeller, with a fixed size and shape of the axial velocity component assumed by the steering adjustment section Part of the two guide rollers between the tongue section adjacent the impeller chamber space communicating cross-section, the cross-sectional convergence of independent control And tangential and axial movement, with the central angle of diversion increases, partly in cross-section of the guide wheel for the start and end of the tongue cycle Resistance to change, the variation within a cycle are: ...

b, cross-section from the start line segment (128) has, through a variety of shape changes, the first is the (128) for the major axis length Semi-elliptical, gradually increasing its minor axis: a semicircle, the marginal semi-continuous forward to form a semicircle in front followed by a rectangular Section; when the tongue appears, semicircle moved (126) position, the transfer chamber and impeller flow channel segments are separated and become pressurized flow channel;

c, the tongue appears and isolation impeller cavity, (126) and (128) defining a flow path to become pressurized flow channel, before continuing Shift and distortion, leaving a small amount of advance minimum physical width of the tongue, the line followed by a line segment laterally into marginal bent backwards Long semi-elliptical, its minor axis continuously lengthened, then changed to a semicircle pan, until the final point into the flow channel bottom (127) So far, the process, the semi-continuous forward the forward margin until the guide wheel 125 is tangent to the bottom surface, to a continuous compression Semicircular semi-elliptical, and finally into the through line and the bottom plane, or the centroid of the contour line should be greater than the speed of movement of the bus Corresponding to the moving speed between an appropriate percentage, for example more than 50%, so that the cross-sectional area of ​​the tongue and the strength capable of continuous growth Plus, pressurized flow channel cross-section during orthotopic forward, the area required by deceleration supercharged change. ...

c, the tongue appears and isolation impeller cavity, (126) and (128) defining a flow path to become pressurized flow channel, before continuing Shift and distortion, leaving a small amount of advance minimum physical width of the tongue, the line followed by a line segment laterally into marginal bent backwards Long semi-elliptical, its minor axis continuously lengthened, then changed to a semicircle pan, until the final point into the flow channel bottom (127) So far, the process, the semi-continuous forward the forward margin until the guide wheel 125 is tangent to the bottom surface, to a continuous compression Semicircular semi-elliptical, and finally into the through line and the bottom plane, or the centroid of the contour line should be greater than the speed of movement of the bus Corresponding to the moving speed between an appropriate percentage, for example more than 50%, so that the cross-sectional area of ​​the tongue and the strength capable of continuous growth Plus, pressurized flow channel cross-section during orthotopic forward, the area required by deceleration supercharged change. ...

a, with its port and three-dimensional annular channel cochlear inner compatible three-dimensional motion characteristics and constraints, construction or adaptive generation leaves Wheel and guide wheel multi-channel diversion work, convergence, rotation, axial steering connection boundary conditions, both to meet the impeller inlet connection Requirements, and meet the guide wheel outlet connections to the heart of the requirements to make the single-stage and multi-stage pumps pump is universal, according to use as a single-stage Universal pump and multi-stage pump flow field boundary modules to support the circulation of the conservative connection mode; ...

b% E3% 80% 81% E5% 88% A9% E7% 94% A8% E5% 85% B6% E7% 8E% AF% E5% BD% A2% E6% 8E% A5% E5% 8F% A3% E5% 8F% 8A% E4% B8% 89% E7% BB% B4% E8% 9C% 97% E9% 81% 93% E5% 86% 85% E9% 83% A8% E5% 85% BC% E5% AE% B9% E5% 92% 8C% E7% BA% A6% E6% 9D% 9F% E4% B8% 89% E7% BB% B4% E8% BF% 90% E5% 8A% A8% E7% 9A% 84% E7% 89% B9% E6% 80% A7% EF% BC% 8C% E6% 89% A9% E5% B1% 95% E4% B8% BA% E6% B5% 81% E5% 85% A5% E6% B5% 81% E5% 87% BA% E6% 96% B9% E5% 90% 91% 0A% 20% 20% 20% 20% 20% 20% 20% 20% 20% 20% 20% 20% 20% 20% 20% 20% E4% BA% 92% E5% 8F% 8D% E7% 9A% 84% E3% 80% 81% E5% 88% 86% E6% B5% 81% E6% B1% 87% E6% B5% 81% E6% 80% A7% E8% B4% A8% E4% BA% 92% E5% 8F% 8D% E7% 9A% 84% E6% 8A% 80% E6% 9C% AF% E8% AE% BE% E8% AE% A1% E5% 85% BC% E5% AE% B9% E6% 80% A7% EF% BC% 8C% E6% 8D% AE% E4% BB% A5% E7% 94% A8% E4% BD% 9C% E5% 9C% A8% E4% BF% 9D% E5% AE% 88% E7% 8E% AF% E9% 87% 8F% E8% BF% 9E% E6% 8E% A5% E6% A8% A1% E5% BC% 8F% E4% B8% 8B% E5% 89% 8D% E5% 90% 8E% E9% 80% 9A% E7% 94% A8% E7% 9A% 84% 0A% 20% 20% 20% 20% 20% 20% 20% 20% 20% 20% 20% 20% 20% 20% 20% 20% E6% B5% 81% E5% 9C% BA% E5% AF% B9% E7% A7% B0% E8% BE% B9% E7% 95% 8C% E6% A8% A1% E5% 9D% 97% EF% BC% 9B

c, with its port and three-dimensional annular channel cochlear inner direction compatibility and continuity of three-dimensional motion, flow limitation and optimization The spatial and temporal variation of speed ratio, to the minimum, it is to be used with stability and low loss characteristics of the flow field boundary module Circulation for conservative, high-performance connection mode;

d, using its interface and mounting ring for the mouth of the rotational symmetry, and brought out pipe snail trails and relative angle based on the tongue Positioning features, according to construct separate variable angle front cover features a tube to support the combination of modular assembly required knot Structure and function expansion design;

e, using its belt bearing plate, bearing structural features such as the integration in the technology and process design can be identified as the molding Functional components of a single part, contains the above techniques expanded, according to the connection mode to construct support assembly size and interface Parameters can be standardized cover modules, expanding its small size, simple design, low cost, the value of the use of powerful range.

27, according to claim 3 or 11 or 23 or 24 or 25, wherein the pump, use of a module according to claim 4, wherein Combination method of composition, characterized in that: the heart contains the booster module, which lead to the heart from the wheel, the impeller shaft and the impeller chamber cover The combination, or other functional accessories comes with a standardized interface parameters and assembly size, radial guide wheel is mold Forming integrated manufacturing, and its cavity side flat or curved surface with the impeller rotating forming gap with the outer side of the cavity parameters are based on the impeller Designed prior to the transfer section of flow channel marginal surfaces, their grade-stage housing has assembled only the mouth, connected to the housing of the separator as a guide Leaf supporting substrate, while isolation from the impeller chamber and guide wheel cavity and subjected to the effect of pressure during the impeller chamber cover is molded weight loss Structural parts, its surface and the cavity side rotating impeller to form gap with the outer edge of the cavity side of the impeller design parameters are based on the transfer of stream segments Dogo marginal surfaces to make the transfer section to get a complete flow path constraints, and with the pressurized flow series, assembly, guide wheel load sequence Impeller and the impeller chamber cover, respectively, through three housing spigot, shaft and impeller chamber positioning of the guide wheel, run-time, the flow from the mold Block the entrance with a circulation rotating axial flow impeller, which accept the blade along the normal force reactive power to accelerate and increase the centrifugal force integration Gabi energy flows through the transfer section of flow channel guide wheel, in which the deceleration pressurized, turn 90 degrees from the axis of the ring near the amount of outflow port with ring mold Blocks. ...

27, according to claim 3 or 11 or 23 or 24 or 25, wherein the pump, use of a module according to claim 4, wherein Combination method of composition, characterized in that: the heart contains the booster module, which lead to the heart from the wheel, the impeller shaft and the impeller chamber cover The combination, or other functional accessories comes with a standardized interface parameters and assembly size, radial guide wheel is mold Forming integrated manufacturing, and its cavity side flat or curved surface with the impeller rotating forming gap with the outer side of the cavity parameters are based on the impeller Designed prior to the transfer section of flow channel marginal surfaces, their grade-stage housing has assembled only the mouth, connected to the housing of the separator as a guide Leaf supporting substrate, while isolation from the impeller chamber and guide wheel cavity and subjected to the effect of pressure during the impeller chamber cover is molded weight loss Structural parts, its surface and the cavity side rotating impeller to form gap with the outer edge of the cavity side of the impeller design parameters are based on the transfer of stream segments Dogo marginal surfaces to make the transfer section to get a complete flow path constraints, and with the pressurized flow series, assembly, guide wheel load sequence Impeller and the impeller chamber cover, respectively, through three housing spigot, shaft and impeller chamber positioning of the guide wheel, run-time, the flow from the mold Block the entrance with a circulation rotating axial flow impeller, which accept the blade along the normal force reactive power to accelerate and increase the centrifugal force integration Gabi energy flows through the transfer section of flow channel guide wheel, in which the deceleration pressurized, turn 90 degrees from the axis of the ring near the amount of outflow port with ring mold Blocks. ...

29, according to a centrifugal pump according to claim 27, characterized in that: the heart containing closed impeller booster module, which To the heart by the guide wheel (167), closed impeller (164) and impeller chamber cover (162) axial combination, in which the impeller chamber Cover (162) dredged on the space occupied by the impeller cover to make leaf slot flow channel and outlet channel anastomosis. ...

29, according to a centrifugal pump according to claim 27, characterized in that: the heart containing closed impeller booster module, which To the heart by the guide wheel (167), closed impeller (164) and impeller chamber cover (162) axial combination, in which the impeller chamber Cover (162) dredged on the space occupied by the impeller cover to make leaf slot flow channel and outlet channel anastomosis. ...

31, according to claim 27, wherein the centrifugal pump, which is characterized, including the semi-open impeller than the average rate of high potential boost to the heart Module, which lead to the heart by the wheel (188), semi-open impeller than the average rate of high potential (183) and impeller chamber cover (182) axis The combination. ...

32, according to claim 27, wherein the centrifugal pump, its features are: high speed potential containing both closed impeller to the heart than the supercharged model Block, the module to the heart by the guide wheel (198), semi-open impeller than the average rate of high potential (193) and impeller chamber cover (192) axial Combination, wherein the impeller chamber lid (192) covers the dredged space occupied by the impeller, and the runner groove leaves the outer flow channel outlet Anastomosis.

33, according to claim 27, wherein the centrifugal pump, wherein: Contains prerotator closed-paced high growth potential than the impeller to the heart Pressure module, which lead to the heart by the wheel (208), the average rate of high potential than closed impeller (204), prerotator (201) and impeller Chamber cover (202) a combination of axial, wherein the impeller chamber lid (192) dredged on the space occupied by the impeller cover.

34, according to claim 27, wherein the centrifugal pump, which is characterized by: antifriction closed contain both high-speed impeller to the heart than the growth potential Pressure module, which lead to the heart by the wheel (219), the average rate of high-potential than closed impeller (220), impeller chamber cover (215) to And the V-shaped annular groove gas-gap cover (211), V-shaped groove ring (212), two-phase flow tube (214), the front cover rivet The front end chamber pressure equalizing hole (217) combination, wherein the impeller chamber lid (215) on the dredged space occupied by the impeller cover.

35, according to claim 27, wherein the centrifugal pump, which is characterized by: antifriction contains prerotator are closed impeller speed ratio to the high potential Heart pressurized module, which lead to the heart by the wheel (228), closed impeller than the average rate of high potential (230), impeller chamber cover (225) And axial stream prerotator (221) and the V-shaped groove ring gas barrier structure (222), two-phase flow tube (223), front and rear end cavity Connectivity pressure equalization hole (227) components.

35, according to claim 27, wherein the centrifugal pump, which is characterized by: antifriction contains prerotator are closed impeller speed ratio to the high potential Heart pressurized module, which lead to the heart by the wheel (228), closed impeller than the average rate of high potential (230), impeller chamber cover (225) And axial stream prerotator (221) and the V-shaped groove ring gas barrier structure (222), two-phase flow tube (223), front and rear end cavity Connectivity pressure equalization hole (227) components....

37, according to claim 12 or 26, wherein the pump, use of claim 4, wherein the modular combination method of Features are: contains two symmetrically angularly out tube end cap module and a pressurized module to the heart of the two modules based on the corresponding cuckoo Cells each with completely interchangeable, or according to the corresponding specifications of the table on which the parent test medium, maximum speed, maximum temperature, maximum resistance Interchangeability pressure and other parameters established, press the "axis of the annular flow from the mouth with a ring near the amount of inflow and outflow" Connection mode 3 modules axial Combination constitutes symmetrical with interchangeable modules cover variable angle to the heart of the pipe pressurized single-stage centrifugal pumps, the combination is a design connected Connected with the production of the assembly and use of the repair, interchangeable cover these procedures. ...

37, according to claim 12 or 26, wherein the pump, use of claim 4, wherein the modular combination method of Features are: contains two symmetrically angularly out tube end cap module and a pressurized module to the heart of the two modules based on the corresponding cuckoo Cells each with completely interchangeable, or according to the corresponding specifications of the table on which the parent test medium, maximum speed, maximum temperature, maximum resistance Interchangeability pressure and other parameters established, press the "axis of the annular flow from the mouth with a ring near the amount of inflow and outflow" Connection mode 3 modules axial Combination constitutes symmetrical with interchangeable modules cover variable angle to the heart of the pipe pressurized single-stage centrifugal pumps, the combination is a design connected Connected with the production of the assembly and use of the repair, interchangeable cover these procedures. ...

39, according to claims 29 and 37 of the centrifugal pump, its features are: closed impeller includes a booster module to the heart And two variable angle of the pipe end cap module is symmetrical, the former by a closed impeller (255), impeller chamber cover (253) and to the heart of the guide wheel (257) Composition, which were used as the front cover (251) and rear (260), combined into axial symmetry with interchangeable modules cover variable angle A tube closed impeller radial single-stage centrifugal supercharger.

39, according to claims 29 and 37 of the centrifugal pump, its features are: closed impeller includes a booster module to the heart And two variable angle of the pipe end cap module is symmetrical, the former by a closed impeller (255), impeller chamber cover (253) and to the heart of the guide wheel (257) Composition, which were used as the front cover (251) and rear (260), combined into axial symmetry with interchangeable modules cover variable angle A tube closed impeller radial single-stage centrifugal supercharger....

41, according to claims 31 and 37 of the centrifugal pump, its features are: contains a semi-open impeller than the average rate of high potential Radial booster modules and two variable angle of tube end cap module symmetry, the former by a semi-open impeller than the average rate of high potential (274), leaves Round chamber cover (273), radial guide wheel (277) composition, which were used as the front cover (271) and rear (280), axial group Synthesis of interchangeable modules cover variable angle of symmetric tube semi-open impeller than the average rate of high potential single-stage centrifugal supercharger to the heart.

42, and 37 according to claim 32 wherein the centrifugal pump, which is characterized by: Contains a closed impeller than the average rate of high potential to Heart pressurized modules and two variable angle of the pipe end cap module is symmetrical, the former by a closed-paced high-potential ratio impeller (284), impeller chamber Cover (283), radial guide wheel (287) composition, which were used as the front cover (281) and rear (290), axial combined into Symmetrical with interchangeable modules cover variable angle of pipe are closed impeller speed high potential than single-stage centrifugal supercharger to the heart.

43, and 37 according to claim 33 wherein the centrifugal pump, wherein: Includes a pre-swirl closed-paced high potential leaf Round to the heart becomes pressurized modules and two symmetrical angles out tube end cap module, the former by a closed-paced high-potential ratio impeller (295), installed The impeller suction chamber prerotator (293), impeller chamber cover (294), to the heart of the guide wheel (297), the latter having respectively For the front cover (291) and rear (300), combined into axial symmetry with interchangeable modules cover variable angle of the tube closed paced prerotator High potential boost to the heart than the single-stage impeller centrifugal pump.

43, and 37 according to claim 33 wherein the centrifugal pump, wherein: Includes a pre-swirl closed-paced high potential leaf Round to the heart becomes pressurized modules and two symmetrical angles out tube end cap module, the former by a closed-paced high-potential ratio impeller (295), installed The impeller suction chamber prerotator (293), impeller chamber cover (294), to the heart of the guide wheel (297), the latter having respectively For the front cover (291) and rear (300), combined into axial symmetry with interchangeable modules cover variable angle of the tube closed paced prerotator High potential boost to the heart than the single-stage impeller centrifugal pump....

43, and 37 according to claim 33 wherein the centrifugal pump, wherein: Includes a pre-swirl closed-paced high potential leaf Round to the heart becomes pressurized modules and two symmetrical angles out tube end cap module, the former by a closed-paced high-potential ratio impeller (295), installed The impeller suction chamber prerotator (293), impeller chamber cover (294), to the heart of the guide wheel (297), the latter having respectively For the front cover (291) and rear (300), combined into axial symmetry with interchangeable modules cover variable angle of the tube closed paced prerotator High potential boost to the heart than the single-stage impeller centrifugal pump....

46, and 37 according to claim 36 wherein the centrifugal pump, which is characterized by: antifriction contains a super-fast high prerotator are closed Potential than the radial impeller booster modules and two variable angle of the tube symmetry cover module with extended covered by the transfer of the former paragraph runner Impeller cap (326) is closed all the high-speed potential than the impeller (327), impeller chamber cover (325), to the heart of the guide wheel (329), the pre-spin Device (322) and the gas barrier gap (323), the front cavity two-phase flow tube (324), the two-phase flow back chamber tube (328), with The latter were used as the front cover (321) and rear (330), combined into axial symmetry with interchangeable modules cover variable angle of the tube over Antifriction prewhirl are closed impeller speed high potential to the heart than the single-stage centrifugal supercharger. ...

47, according to claim 12 or 26, wherein the pump, use of claim 4, wherein the modular combination method of Features are: contains two symmetrically angularly out tube cover up to 64 modules and a plurality of radial supercharger module, both modules Based on the corresponding sub-specifications each with completely interchangeable, or according to the corresponding specifications of the table on which the parent test medium, the maximum speed, the most High temperature, maximum pressure and other parameters interchangeability holds, where the maximum pressure is axially segmented interchangeability or established, in accordance with "Paraxial annular flow from the mouth of the amount of inflow and outflow belt loop" connection mode, the module will cover symmetrically divided into front and back cover, will be the heart Turn axial tandem booster module, all modules axial combinations that constitute a module interchangeability symmetric cover variable angle to the heart of the tube Multistage centrifugal supercharger, the combination is in connection with the design, production, assembly and use of the repair, interchangeable cover These procedures. ...

47, according to claim 12 or 26, wherein the pump, use of claim 4, wherein the modular combination method of Features are: contains two symmetrically angularly out tube cover up to 64 modules and a plurality of radial supercharger module, both modules Based on the corresponding sub-specifications each with completely interchangeable, or according to the corresponding specifications of the table on which the parent test medium, the maximum speed, the most High temperature, maximum pressure and other parameters interchangeability holds, where the maximum pressure is axially segmented interchangeability or established, in accordance with "Paraxial annular flow from the mouth of the amount of inflow and outflow belt loop" connection mode, the module will cover symmetrically divided into front and back cover, will be the heart Turn axial tandem booster module, all modules axial combinations that constitute a module interchangeability symmetric cover variable angle to the heart of the tube Multistage centrifugal supercharger, the combination is in connection with the design, production, assembly and use of the repair, interchangeable cover These procedures. ...

49, according to claim 29 and 47 wherein the centrifugal pump, which is characterized by: the heart contains multiple closed impeller booster module And two variable angle of the pipe end cap module is symmetrical, the former by a closed impeller (344), impeller chamber cover (343) and to the heart of the guide wheel (345) Composition, which were used as the front cover (342) and rear (349), combined into axial symmetry with interchangeable modules cover variable angle A tube closed impeller multistage centrifugal supercharger to the heart.

49, according to claim 29 and 47 wherein the centrifugal pump, which is characterized by: the heart contains multiple closed impeller booster module And two variable angle of the pipe end cap module is symmetrical, the former by a closed impeller (344), impeller chamber cover (343) and to the heart of the guide wheel (345) Composition, which were used as the front cover (342) and rear (349), combined into axial symmetry with interchangeable modules cover variable angle A tube closed impeller multistage centrifugal supercharger to the heart....

51, according to claim 31 and 47 wherein the centrifugal pump, wherein: Includes several semi-open impeller than the average rate of high potential Radial booster modules and two variable angle of tube end cap module symmetry, the former by a semi-open impeller than the average rate of high potential (364), leaves Round chamber cover (363) and to the heart of the guide wheel (365) composition, which were used as the front cover (362) and rear (369), axial group Synthesis of interchangeable modules cover variable angle of symmetric tube semi-open impeller than the average rate of high potential multistage centrifugal supercharger to the heart.

52, according to claim 32 and 47 wherein the centrifugal pump, its features are: both contain multiple closed impeller speed ratio to the high potential Heart pressurized modules and two variable angle of the pipe end cap module is symmetrical, the former by a closed-paced high-potential ratio impeller (374), impeller chamber Cover (373) and to the heart of the guide wheel (375) composition, which were used as the front cover (372) and rear (379), axial combined into Symmetrical with interchangeable modules cover variable angle of pipe are closed impeller speed high potential than multistage centrifugal supercharger to the heart.

52, according to claim 32 and 47 wherein the centrifugal pump, its features are: both contain multiple closed impeller speed ratio to the high potential Heart pressurized modules and two variable angle of the pipe end cap module is symmetrical, the former by a closed-paced high-potential ratio impeller (374), impeller chamber Cover (373) and to the heart of the guide wheel (375) composition, which were used as the front cover (372) and rear (379), axial combined into Symmetrical with interchangeable modules cover variable angle of pipe are closed impeller speed high potential than multistage centrifugal supercharger to the heart....

52, according to claim 32 and 47 wherein the centrifugal pump, its features are: both contain multiple closed impeller speed ratio to the high potential Heart pressurized modules and two variable angle of the pipe end cap module is symmetrical, the former by a closed-paced high-potential ratio impeller (374), impeller chamber Cover (373) and to the heart of the guide wheel (375) composition, which were used as the front cover (372) and rear (379), axial combined into Symmetrical with interchangeable modules cover variable angle of pipe are closed impeller speed high potential than multistage centrifugal supercharger to the heart....

55, according to claim 35 and 47 wherein the centrifugal pump, which is characterized by: antifriction prerotator contains multiple closed-paced high potential Booster module to the heart than the impeller and two variable angle of tube end cap module symmetry, the former by a closed-paced high-potential ratio impeller (406), Prerotator (404), impeller chamber cover (403), to the heart of the guide wheel (405) and gas-gap (408), two-phase flow tube (407), Front end chamber communicating pressure equalizing hole (409) formed, which were used as the front cover (402) and rear (410), the axial combined into Symmetrical with interchangeable modules cover variable angle of friction prerotator closed tube are high-speed impeller to the heart than the potential multistage centrifugal supercharger.

56, according to claim 36 and 47 wherein the centrifugal pump, which is characterized by: antifriction contains multiple ultra-paced high prerotator closed Potential than the radial impeller booster modules and two variable angle of the tube symmetry cover module with extended covered by the transfer of the former paragraph runner Impeller cap (418) is closed all the high-speed potential than the impeller (414), prerotator (411), impeller chamber cover (413), lead to the heart Wheel (415) and a gas barrier gap (416), the front chamber friction drive two-phase flow tube (417), rear cavity friction drive media Into the tube (419) composition, the latter were used as the front cover (412) and rear (420), axial combined into modules interchangeable with Symmetric cover variable angle of pipe friction prerotator closed over both high-speed impeller to the heart than the potential multistage centrifugal supercharger. ...

56, according to claim 36 and 47 wherein the centrifugal pump, which is characterized by: antifriction contains multiple ultra-paced high prerotator closed Potential than the radial impeller booster modules and two variable angle of the tube symmetry cover module with extended covered by the transfer of the former paragraph runner Impeller cap (418) is closed all the high-speed potential than the impeller (414), prerotator (411), impeller chamber cover (413), lead to the heart Wheel (415) and a gas barrier gap (416), the front chamber friction drive two-phase flow tube (417), rear cavity friction drive media Into the tube (419) composition, the latter were used as the front cover (412) and rear (420), axial combined into modules interchangeable with Symmetric cover variable angle of pipe friction prerotator closed over both high-speed impeller to the heart than the potential multistage centrifugal supercharger. ...

Images