CN103671087B

CN103671087B - With revolving the fluid machinery moving piston structure

Info

Publication number: CN103671087B
Application number: CN201210329989.1A
Authority: CN
Inventors: 王五; 王五一
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-09-09
Filing date: 2012-09-09
Publication date: 2016-06-08
Anticipated expiration: 2032-09-09
Also published as: CN103671087A

Abstract

The present invention relates to revolving the fluid machinery moving piston structure. Being characterized as and comprise " C " the shape circular cylinder being made up of multiple parts, piston is pind down by connecting rod in cross crank gear, does circulation turnover translation along cylinder body under rotor drives. There is structure simple, easy to manufacture, low abrasion, tripping speed height, the characteristics such as the linear direct ratio change of volume. For the manufacture of volume pump and under meter, it may be achieved micro-precision measures. For the manufacture of hydro-pump (motor), then flow is steady without noise. Low from the good cost of absorption, toothed gear pump (motor), centrifugal self-priming pump, submersible pump etc. can be replaced. Pressure height, energy-conservation feature is had for all kinds of fluid delivery pumps such as fire pump, building working shafts. For water conservancy lift pump, filter dirt negative pressure blower fan can much slower energy consumption, power device for generating hydroelectricity can improve energy utilization rate. Vacuum tightness height, can be used for manufacturing vacuum pump. Real is a kind of idealized pump configuration, and application surface is extremely wide, and market is extremely wide.

Description

With revolving the fluid machinery moving piston structure

Technical field

The present invention is subordinate to mechanical manufacturing field, relate to the multiple mechanism comprising a same configuration, more specifically be a kind of can realize manufacture simple economy, flow linearly the abrasion long lifetime accurate, low, the high requirement of the little efficiency of volume, be applied to a kind of physical construction of the product manufacturing such as positive-displacement pump and derived all related productss, with realize various gas, liquid, etc. conveying transfer, metering and mechanical transmission. Mainly comprise hydro-pump, oil motor, volume pump, under meter, oil pump, water pump (fire pump that especially pressure requirements is high and building water supply pump), chemical pump, food pump, air pump, vacuum pump, fly-ash separator negative pressure blower fan, even power device for generating hydroelectricity etc.

Background technology

Owing to the invention relates to the invention of a kind of physical construction of the products such as pump, it relates to product category is more, owing to main structure is identical with working mechanism, pardon specifically not bright one by one, existing based on hydro-pump, and other related products is incidentally illustrated.

Its flow of hydro-pump in desirable should direct ratio linear with drive shaft speed, when driving invariablenes turning speed, it is possible to realize flow steady and export, and without pocketed oil phenomenon, it may be achieved stable working without noise, to improve Working environment. Measuring apparatus can realize pump and under meter unites two into one (volume pump), thus reduce equipment manufacturing cost, alleviate weight, or improve under meter Measuring Precision. Pump in desirable also answers structure simple, and easy to manufacture, volume is little, to realize low cost. Pump in desirable also should rub little, extends work-ing life to reduce abrasion. Pump in desirable also should have good in suction ability, it may be achieved auto-pumping, it is possible to improve consider dirt device air flow quantity in order to form high vacuum pressure reduction. Pump in desirable also should have higher working efficiency, to save the energy. Pump in desirable its rotate parts and answer symmetrical configuration balance, it is possible at a high speed running and without shaking and noise, to reduce the volume and weight of pump and power set. Pump in actual use, all can not have These characteristics completely, due to various in style, not be illustrated one by one at present. Now only from economy and market angle, with the most economical at present, toothed gear pump and vane-type centrifugal (eddy current) pump are that example is explained to application surface the most widely. Though toothed gear pump structure is simple, compare other positive-displacement pump advantage of lower cost, but Gear Processing needs specific equipment and technology, working accuracy height, therefore technical threshold height; And relying on flank engagement sealing, engagement place exists rolls and sliding friction, therefore causes tooth surface abrasion owing to the flank of tooth carries working load, must bestow lubrication, can not be used for the conveying of the fluid such as water, food; Flow pulsation is relatively big and have pocketed oil phenomenon therefore operating noise is big, and the highest rotating speed is limited by Gear shape process precision; By the restriction of tooth Profile Machining, it is difficult to realize super-flow. Vane-type centrifugal (eddy current) is though pump structure is simple, also easy to manufacture, the low abrasion of cost is little, but certainly inhales ability, and operating pressure is low (can only improve pressure by the mode of plural serial stage when applying to fire pump, add cost and volume, weight), high work rotating speed can only be relied on be achieved, not only increase the requirement to power set, also bring extra energy expenditure (power consumption is directly proportional to the cube of rotating speed), efficiency is low, the waste energy; And can only unidirectional work, change the flow direction must by pipeline and valve; Although vane-type centrifugal (eddy current) pump can by taking the modes such as immersion to overcome from inhaling scarce capacity (such as submersible pump, but the seal request height to power set electric motor, moisture damage and electric leakage accident easily occur). Flow is big by the impact of operating pressure, in inverse relation. Low vacuum when applying to fly-ash separator, energy consumption is big. Compare vane-type centrifugal (eddy current) pump, positive-displacement pump has operating pressure height, stability of flow, strong from suction ability, can two-way work, efficiency height, the advantage of energy-conservation (power consumption and the linear direct ratio of rotating speed), but generally there is complex structure, manufacture difficulty, cost height, abrasion problem big, that easily card is stagnant in existing positive-displacement pump, it is very difficult to replacement vane-type centrifugal (eddy current) pump, range of application is subject to great restriction. It is known that, the piston pump of translational motion is the simplest, most effective, wear and tear minimum, the positive-displacement pump that vacuum tightness is the highest, has the good characteristic of flow and piston movement speed linearly proportional relation, when keeping piston traveling speed invariable, the constant flow pulse free of pump can be realized, it is idealized pump.Regrettably by the restriction of travel of piston, work cannot be continued. Usually realize in a rotating manner continuing outputting power due to power set, the coupling conversion of linear reciprocation and circumference rotation can only be carried out at present by crank slide block and cam mechanism. Mainly contain radial and axial ram pump etc. There is flow pulsation, easy to wear, complex structure cost height, volume is big, and vibration greatly can not the problem such as running at a high speed. As the axis of the piston pump of translational motion (cylinder body) is transformed into, by straight line, the circle that the whole story, end overlapped, now cylinder body is with " C " the font annulus that the whole story, end cut off, piston drives annularly cylinder body constantly to pass through whole story end by round rotor shape piston rod to cut off continuous cycle rotation, namely likely realize all good characteristics of translational motion piston pump. There is the pump of annular cylinder, piston, rotor structure, the pattern that the whole story, end cut off is crossed according to piston, mainly contain flexible avoiding type at present: such as vane pump (forming end partition at the whole story by bias) and patent CN90101741 gate type hydraulic pump (motor) etc., dodge end partition realization at the whole story by the flexible realization of piston radial and pass through. Its weak point is that piston wear is big, complex structure etc. The staggered span type of two parallel pumps complementation: such as inside and outside toothed gear pump etc., adopt many pistons series connection structure, two pump pistons engage each other sealing, double-pump complementation, the end at the whole story that the piston of a pump is also another pump cuts off, the interlaced leap that continues, and its weak point is that flow pulsation is big, having pocketed oil phenomenon, operating noise is big. Piston is from turning around more type: such as patent CN201010601531 rotopiston pump, take multiple fan-shaped piston by geartransmission not only with rotor together revolution, also simultaneously along the synchronized rotation in rotor turns direction, thus walk around end partition at the whole story, although it can realize linear flow, but must at least 6 pistons, 7 gears, therefore cost is extremely high, and under inhaling working order, piston proceeds to the bigger of volume of air that low pressure chamber the carries effective working volume with pump from high pressure chest, and therefore low vacuum, self-priming performance is poor. It thus is seen that the pump of prior art construction is difficult to reach or close to the perfect condition of translational motion piston pump. Toothed gear pump and vane-type centrifugal (eddy current) pump are most widely used in volume and non-positive-displacement pump product respectively so that its cost easy to manufacture is low. If find a kind of structure more simply to manufacture the lower mode passing through end partition at the whole story of easier cost, create the new pump kind that a kind of perfection embodies all good characteristics of translational motion piston pump, toothed gear pump and most of vane-type centrifugal (eddy current) pump will be replaced, becoming the main flow of the products such as pump class, market outlook are extremely wide. And the change of a series of related products cost, performance can be caused. As: its high-level efficiency can make the dedusting negative pressure blower fan of employing vane-type centrifugal (eddy current) pump configuration, and the energy consumptions such as water conservancy lift pump reduce greatly; Hydraulic generator equipment, energy utilization rate is more high. There are great economic implications and far-reaching social effect.

Summary of the invention

As mentioned above, it is necessary, prior art is dodged by stretching, double-pump complementation is staggered to be crossed over, and piston, from turning around structures such as getting over, makes piston cross end partition at the whole story, it is achieved that the running non-stop run of circular cylinder piston cycle. Obviously, over-all properties is all undesirable. And piston does not have at present set foot in around circle translation crossing structure, and to be realized, it is necessary to solve piston around circle translation problem. The present invention, according to the movement characteristic of connecting rod in constant speed cross crank gear, successfully solves this problem, creates the product structures such as a kind of idealized pump (motor). Now for hydro-pump, its constructional feature and useful effect are illustrated. It is achieved by the following technical solutions.

The present invention mainly comprises the circle being jointly made up of multiple parts " C " shape circular cylinder with the hydro-pump etc. revolving the fluid machinery moving piston structure, at least two pistons, a rotor, one comprises the combined type drive mechanism of at least many groups cross crank gear with number of pistons correspondent equal; In described piston and cross crank gear, connecting rod is fixedly connected. Concrete constructional feature and the useful effect of corresponding function be:

Described circle " C " shape circular cylinder is made up of jointly housing, rotor. Described housing has a cylindrical form interior surface, and described rotor comprises the side cover at core block and its two ends. Described rotor core block part is a right cylinder, axis and housing inner cylindrical surface axes coincide. Described rotor-side cover is cake shape right cylinder, is positioned at rotor core block part both side ends, external cylindrical surface and the airtight tactile conjunction of housing cylindrical form interior surface. Therefore housing and rotor form airtight circle " O " shape circular cylinder. Its cylindrical form interior surface of described housing also comprises one and cuts off body portion to the end at the whole story of axle center projection. Described housing end at the whole story cuts off body and is divided into a cross section to be the projection of one section of " C " shape ring-type, end and the airtight tactile conjunction of rotor-side cover inner face, inner cylinder face and the rotor core airtight tactile conjunction of block part external cylindrical surface, therefore will justify the airtight partition of " O " shape annular cylinder and form circle " C " shape circular cylinder. Described rotor core block part is circumferentially also evenly equipped with the quantity rounded section groove equal with number of pistons. Described piston is the cylindrical construction of a cross section in approximate circle sector, axle center place comprises a transmission shaft structure, by axle center place transmission shaft and rotor-side cover are installed in the rounded section groove of rotor core block part with transmission shaft with the circular hole in footpath, and can rotate along rounded section recess axis, external cylindrical surface and the airtight tactile conjunction of rounded section groove inner cylinder face, end face and the airtight tactile conjunction of rotor-side cover inner face, the external cylindrical surface of piston and the tangent and airtight tactile conjunction of housing cylindrical form interior surface when being positioned at working position. Thus circular cylinder is divided into two mutual airtight high low pressure working chambers. The arc length that described housing end at the whole story cuts off body portion inner cylinder face cross section circular arc is not less than the arc length that rotor core block part external cylindrical surface cross section circular arc is positioned at rounded section groove slot-open-section. Ensure that housing end at the whole story cuts off body portion rounded section groove and piston on rotor core block and remains airtight partition state through out-of-date, cut off reliable. Described piston sector crosssection external arc arc length is not less than N/mono-number of fan-shaped cylinder body piston (N be) of same radius circumference length. Ensure that can seamless connection, alternately work between each piston. Described housing is positioned on the cylindrical form interior surface of end partition at whole story body both sides to have fluid inlet and outlet. Described rotor-side lid one side end face is also provided with a driving (output) axle in the place of axle center. Possess basic structure and the element of work of the devices such as pump. The described combined type drive mechanism comprising at least many groups cross crank gear with number of pistons correspondent equal comprises rotor-side cover, connecting rod and multi-joint crank. Described connecting rod is positioned at the outside of rotor-side cover, and one end divides overhanging end to be fixedly connected with piston by piston axes place driveshaft section, and the other end and multi-joint crank are hinged. Therefore, piston rotation state pins down by the connecting rod in cross crank gear. Described multi-joint crank comprises multiple crank section, is the cointegrates of multiple crank. Described rotor-side cover also comprises multiple crank section, for another organizes the cointegrates of multiple crank. Therefore number of parts is few, and cost simple and compact for structure is low. Described multi-joint crank, it is arranged on the end cap portion of housing, can rotate along housing end cap plane, its center of rotation and axis of rotor rotation in the heart distance equal effective working length of each connecting rod, the effective working length of each crank equals the distance of fan-shaped cylinder body piston rotation center and rotor rotation center. Therefore being constant speed cross crank gear, the rotational velocity of connecting rod and piston is zero. ?ncouraging ? Ge silk sends spoonful ? sorrow ? ? a small handdrum with beads striking when rotated stomach that boils to grow winding residual fertile Cuo Spanish mackerel ? phenanthrene and make the poor ? ? enlightening of good fortune take off beer 5 generation and fan the real barium curtain of �� to the ? ? �� Na garden residual ? ? that discusses and encourage ? comet Lei witch's word and protect ? pure moisture in the soil enlightening and only encourage ? and abandon and practise ? �� strand and post the bright salty quiet ? You ? C of stern of �� " end of shape circular cylinder returns initiating terminal recirculation and works. When the simplest structure adopting number of pistons to be 2, also at least comprise an auxiliary cross crank gear, its effective working length of auxiliary connecting rod is identical with other connecting rods, hinged with rotor-side cover and multi-joint crank two crank cointegratess respectively, and keep an appropriate phasing degree with other cross crank gears. Solve transmission dead unit problem, it is ensured that also can rotate smooth and easy when only there being 2 pistons. Structure can be realized simplify most, number of parts, overall volume, minimize weight, manufacturing cost minimumization.

By its work and constructional feature it will be seen that piston pass through the whole story end cut off body time except work cylindrical surface and two end faces except other outside surface with the whole story end partition body can be noncontact state, therefore to its shape without particular requirement, requirement on machining accuracy is low. It is generally piston when reducing vacuum take-off to proceed to low pressure chamber from high pressure chest and carry the portion gas backflow that air causes, improve vacuum tightness, should keep as far as possible itself and the whole story end cut off the less dynamic slit between body, to reduce without the return volume of work efficiency to greatest extent, without dynamic slit ideally, its shape is only the inner cylinder face equal with piston rotor axle center rotation radius by two radiuses, one is cut off the tangent external cylindrical surface composition of body inner cylinder face with end at the whole story, therefore without complicated processing face, manufacture simple. The oilless vacuum pump worked under being particularly suitable for dust atmosphere. Not only for keeping compared with small gap but also keep fluid liquid flowing smooth and easy, logical oil groove or end face chamfering or oil groove can be had with housing on the cylinder that piston does not contact, not only avoid the pocketed oil phenomenon in such as oil pump, it also avoid piston by the fluctuation of a working chamber to another working chamber transit time flow simultaneously, it is ensured that any time flow and drive shaft speed all remain desirable linear proportional relation. Also can take that end at the whole story is cut off body and be placed in lowest part, the position of fluid inlet and outlet cuts off body higher than end at the whole story, make to retain all the time in pump a certain amount of liquid, to guarantee at any time, the whole story, end partition body and piston etc. can be immersed in liquid completely, piston passes through the whole story can only bring liquid into low pressure chamber when end cuts off body, gas can not be refluxed, it may be achieved highest attainable vacuum aspirates.

Above-mentioned technology feature, it is applied in different products, existing common structure is simple, cost easy to manufacture is low, low feature of wearing and tearing, also there is its distinctive useful effect: when being applied to hydro-pump (motor), also there is stable working without noise, the feature that symmetrical configuration balance rotating speed height volume is little, also has the feature that flow corner Strict linear direct ratio Measuring Precision is high when being applied under meter (volume pump). Be applied to transferpump also have from suction ability good, stability of flow, pressure height, energy-efficient feature (fire pump and building tap water transferpump etc.). It is applied to vacuum pump also there is vacuum tightness height (centrifugal dedusting negative pressure blower fan during large discharge, to be replaced, fly-ash separator filtration pressure difference can be improved, improve filter dirt effect, energy-efficient) feature, it is applied to water conservancy lift pump energy-saving significance great, carry out water power for replacing water turbine, can further improve energy utilization rate. Therefore application surface is extremely extensive, effect and ideal thereof.

Owing to taking constant speed double crank mechanism driving, therefore working rotating speed no longer by restrictions such as manufacturing accuracy, rotating speed is limitless in theory, realizes the volume and weight of reduction self and drive unit by high design speed. The contact pressure of the trim of each phase mutual friction is little and stable, not by the impact of working load, double crank mechanism only undertakes and maintains the effect that piston moves in parallel attitude, only relevant with piston motion friction resistance by power, load is low, therefore structural strength require low, to take volume little, it is little to wear and tear, loss is low.

The present invention with revolve move piston structure fluid machinery also by its piston, the whole story end cut off the coated one layer of sealing material of external surface, thus not only improve piston and the whole story end cut off body sealing property, also by selecting suitable sealing material and suitable sealing material thickness and structure, make to be non-rigid contact between the trim of relatively sliding, there is certain anti-card stickiness energy, reduce the requirement to working medium and filtration unit, expand the range of application (such as water conservancy lift pump and power station hydrodynamic apparatus etc.) of positive-displacement pump. Also by setting up the sealing-ring of a special crosssection between the external cylindrical surface that covers in rotor tip side and housing inner cylinder face, cross-sectional shape be the circle by 3/4ths and two tangent with it, mutually vertical, the straight-line segment that length is equal with the radius of circle is formed, straight-line segment is positioned at housing end face and rotor-side lid external cylindrical surface place, solve the sealing problem along the circumferential direction that the annular working cylinder that conventional seals circle can not solve is special procured, thus improve the sealing property of circular cylinder.

Accompanying drawing explanation

Accompanying drawing 1 is the present invention with the working process decomposing schematic representation such as hydro-pump revolving the fluid machinery moving piston structure.

Accompanying drawing 2 is the present invention with the structural representation such as hydro-pump revolving the fluid machinery moving piston structure.

Accompanying drawing 3 is that the present invention is with revolving cross crank gear theory structure schematic diagram in the fluid machinery moving piston structure.

Accompanying drawing 4 is the sealed structural representation of the present invention with the hydro-pump etc. revolving the fluid machinery moving piston structure.

Accompanying drawing 5 is the present invention with the flow characteristic schematic diagram such as hydro-pump revolving the fluid machinery moving piston structure.

Accompanying drawing 6 is that the present invention is with the structural representation revolving the fluid machinery high-capacity pump (dedusting fan etc.) moving piston structure.

Embodiment

Below in conjunction with accompanying drawing, the present invention is described further with principle of work and the embodiment of the hydro-pump etc. of the fluid machinery revolving shifting piston structure:

Embodiment of the present invention hydro-pump as visible in Fig. 1 a, Fig. 2 is primarily of housing 1, and housing end cap 3, the whole story, end cut off body 4, rotor core block 5, rotor-side lid 6,7, piston 8,9, and connecting rod 10,11 and multi-joint crank ring 12 etc. form. rotor core block 5 is positioned at housing 1, and rotor-side lid 6,7 is positioned at rotor core block 5 two ends, and housing 1 and rotor form an airtight circular cylinder. the whole story, end partition body 4 was positioned on housing 1, formed circle " C " shape annular cylinder. piston 8,9 is arranged in two symmetrical circular grooves of rotor core block 5, fix by the rotor-side lid 6,7 at rotor core block 5 two ends, and can rotate along rounded section recess axis, sector crosssection outer arc radius is equal with the radius of rotor core block 5 rounded section groove, the external cylindrical surface of piston 8,9 and the inner cylinder face of housing 1 are tangent, thus are partitioned into mutual airtight isolated high low pressure working chamber. fluid inlet and outlet on housing 1 is positioned at end partition at whole story body 4 both sides, is connected with high low pressure working chamber respectively. power transmission on piston 8,9 is completed by the drive shaft on side rotor-side lid 6, thus has possessed the basic structure of positive-displacement pump (motor) and basic element of work. Fig. 1 a��e shows in the embodiment of the present invention hydro-pump process that a piston (piston A) works from starting working to and terminates successively, also show simultaneously and passes through whole story end after another piston (piston B) terminates work and cut off body and return to job initiation end. Fig. 1 d shows end partition at whole story body 4 inner cylinder face cross section circular arc arc length and is greater than the arc length that rotor core block 5 cylinder section cylindrical circular arc is positioned at rounded section groove barbed portion, and the rounded section groove of Fig. 1 d, e display end at whole story partition body 4 on rotor core block 5 is reliable through out-of-date airtight partition all the time. piston 8,9 non-cylindrical has logical oil groove 2 on the surface, not only avoid pocketed oil phenomenon, piston 8 or 9 is also made only to remain the state (as illustrated in figure 1 c) of movement in side working chamber wherein when passing through first and last end and cut off, avoid mobile in cause the extra change of residing working chamber volume, it is ensured that any time flow and drive shaft speed all remain strict linear proportional relation in theory. its rotor angular displacement/cylinder volume variation relation is as shown in Figure 5. it is particularly suitable for the manufacture (compare flow with oval gear structural flow gauge with current kidney-shaped cam linearly accurate, and unique structure is simple, easy to manufacture, the features such as cost is low) of volume pump and under meter. adopt logical tank structure that whole story end can be made in transient process to cut off gap between body 4 and piston 8 or 9 and can be bordering on zero, reduce liquid flowing resistance to greatest extent and without the return space of work efficiency so that it is certainly inhale maximized. the sector crosssection external arc arc length that Fig. 1 e shows piston is greater than 1/2nd of same radius circumference length, and from Fig. 1 a, d, e, f, two pistons achieve the seamless steady operation alternately continued. as seen from Figure 2, connecting rod 10,11 one end is fixedly connected with piston 8,9, and the other end is hinged by hinge pin 13,14 and multi-joint crank 12. owing to one-piece construction needs, multi-joint crank 12 adopts ring structure, multi-joint crank 12 is positioned on side housing end cap 3, can rotate along its inner side plane, it rotates the center of circle and rotor turns center of circle spacing e equals connecting rod 10, effective working length e1 of 11, e2, multi-joint crank 12 is working length L1 effectively, L2 equals piston 8, the distance J1 of 9 rotation center and rotor rotation center, J2, thus (the rotor-side cover crank of Liang Zu mechanism and multi-joint crank section crank combine respectively and manufacture with becoming a part to define two groups of constant speed cross crank gears being made up of as shown in Figure 3 crank connecting rod 10 or 11 of rotor-side lid 7 with 12 two, multi-joint crank length such as grade, on Same Part, two portions position differs 180 ��), due to piston 8, 9 with connecting rod 10, 11 are fixedly connected with, thus achieve the piston as shown in Fig. 1 a��e and around circle translation and pass through cycle operation.From Fig. 2 a, auxiliary connecting rod 20 is hinged with multi-joint crank by hinge pin 15. Pin 13,14 respectively differs 90 �� of phasing degree to hinge pin 15 with cutting with scissors, and when connecting rod 10,11 is in illustrated dead-centre position, still can continue transmission by auxiliary connecting rod 20, it is achieved accessible continuous transmission.

Being also shown in by Fig. 1, Fig. 2, the equal structure of each component is simple, easy to manufacture, kernel component only needs common car milling processing etc., it is not necessary to specific installation and frock, and general small-sized machine processing enterprise can directly go into operation, and amount of parts is few, therefore cost is low, and technical threshold is low. Each rotation block construction or kinestate can accomplish complete symmetry, therefore can operate and friction, noise at a high speed. Transmission mechanism leave by taking seal approach can completely cut off with working portion, and working medium and lubricant no longer influence each other, and can be used for manufacturing water pump, food pump and chemical pump etc. In work, liquid-flow is smooth and easy without turbulent flow loss, therefore efficiency height, it is also possible to for the conveying of thick liquid and liquid class I liquid I. Owing to positive-displacement pump (motor) has the high feature of efficiency, as shown in Figure 6, by adopting sheet material welding or casting structure, large discharge can be realized, substitute centrifugal pump and be applied to large-scale water conservancy lift pump etc., can increase work efficiency, reduce energy consumption, save a large amount of energy; It is applied to and revolves the alternative water turbine of shifting piston-type hydraulic motors and carry out the utilization ratio that water power can improve the energy; Substitute centrifugal blower fan and it is applied to dedusting negative pressure blower fan, the power of drive unit can be reduced, thus reduce energy consumption, higher vacuum tightness can also be formed simultaneously, increase filtration unit operting differential pressure, thus strengthen work effect. Can also two-way work, it is achieved impeller pump can not the working order of realization, simplify the structure of some application centrifugal pump device, or change its mode of operation, produce unexpected effect. Therefore application surface is extremely wide.

As shown in accompanying drawing 4, Fig. 2 a, the present invention is with revolving the fluid machinery moving piston structure also by described piston 8,9 outer cladding one layer of sealing material 16, the whole story end cut off the coated one layer of sealing material 17 of body 4 outside surface, thus improve piston 8,9 and the whole story end cut off body 4 sealing property. By setting up the sealing-ring 18,19 of a special crosssection between the external cylindrical surface of rotor-side lid 6,7 and housing 1 inner cylinder face, cross-sectional shape be the circle by 3/4ths and two tangent with it, mutually vertical, the straight-line segment that length is equal with the radius of circle is formed, straight-line segment is positioned at housing 1 end face and rotor-side lid 6,7 external cylindrical surface place, solve the sealing problem along the circumferential direction that conventional seals circle can not solve, thus improve the sealing property of circular cylinder.

Claims

1. with revolving the fluid machinery moving piston structure, it is characterized by and comprise the circle being jointly made up of multiple parts " C " shape circular cylinder, at least two pistons, a rotor, one comprises the combined type drive mechanism of at least many groups cross crank gear with number of pistons correspondent equal, in described piston and cross crank gear, connecting rod is fixedly connected, described circle " C " shape circular cylinder is made up of jointly housing, rotor, described housing has a cylindrical form interior surface, and described rotor comprises the side cover at core block and its two ends, described rotor core block part is a right cylinder, axis and housing axes coincide, described rotor-side cover is cake shape right cylinder, is positioned at rotor core block both side ends, and rotor-side lid external cylindrical surface and the airtight tactile conjunction of housing cylindrical form interior surface, axle center place, rotor-side lid one side end face also comprises a transmission shaft part, its cylindrical form interior surface of described housing also comprises one and cuts off body portion to the end at the whole story of axle center projection, be positioned on the housing cylindrical form interior surface of end partition at whole story body both sides and have fluid inlet and outlet, described housing end at the whole story cuts off body and is divided into a cross section to be the projection of one section of " C " shape ring-type, end at whole story partition body two ends and the airtight tactile conjunction of rotor-side lid inner face on housing, housing end at the whole story cuts off body inner cylinder face and the rotor core airtight tactile conjunction of block part external cylindrical surface, described rotor core block part is circumferentially also evenly equipped with the quantity rounded section groove equal with number of pistons, the arc length that described housing end at the whole story cuts off body portion inner cylinder face cross section circular arc is not less than the arc length that rotor core block part external cylindrical surface cross section circular arc is positioned at its rounded section groove slot-open-section, described piston is the cylindrical construction of a cross section in approximate circle sector, axle center place comprises a transmission shaft structure, it is installed in the rounded section groove of rotor core block part by the circular hole on axle center place transmission shaft and rotor-side cover, and can rotate along rounded section recess axis, outside piston cylinder and the rotor core block airtight tactile conjunction of rounded section groove inner cylinder face, piston end surface and the airtight tactile conjunction of rotor-side cover inner face, the external cylindrical surface of piston and the tangent and airtight tactile conjunction of housing cylindrical form interior surface when being positioned at working position, when number of pistons is N, sector crosssection external arc arc length is not less than N/mono-of same radius circumference length, the described combined type drive mechanism comprising at least many groups cross crank gear with number of pistons correspondent equal comprises rotor-side cover, connecting rod and multi-joint crank, described connecting rod is positioned at the outside of rotor-side cover, and one end divides overhanging end to be fixedly connected with piston by piston axes place driveshaft section, and the other end and multi-joint crank are hinged, described multi-joint crank comprises multiple crank section, is the cointegrates of multiple crank, described rotor-side cover also comprises multiple crank section, for another organizes the cointegrates of multiple crank, described multi-joint crank, it is arranged on the end cap portion of housing, can rotate along housing end cap inner plane, its center of rotation and axis of rotor rotation in the heart distance equal effective working length of connecting rod, the effective working length of each crank equals the distance of fan-shaped cylinder body piston rotation center and rotor rotation center, when number of pistons is 2, also at least comprise an auxiliary cross crank gear, the effective working length of its connecting rod equals other connecting rods, hinged with rotor-side cover and multi-joint crank two crank cointegratess respectively, and keeps an appropriate phasing degree with other cross crank gears.

2. according to claim 1 with revolve move piston structure fluid machinery, it is characterized by: described piston and the whole story end cut off external surface be coated with one layer of sealing material; The sealing-ring having a special crosssection between the external cylindrical surface of described rotor-side cover and housing, the shape of described special crosssection is that the straight-line segment tangent with it with two, mutual vertical, that length is equal with the radius of circle of the circle by 3/4ths is formed.

3., according to claim 1 with revolving the fluid machinery moving piston structure, it is characterized by: be that one revolves shifting piston pump.

4., according to claim 1 with revolving the fluid machinery moving piston structure, it is characterized by: be that one revolves shifting piston-type hydrodynamicpressure motor.

5. according to claim 1 with revolving the fluid machinery moving piston structure, it is characterized by: be that one revolves shifting piston-type under meter, comprise rotor rotation angle detecting apparatus, value conversion display unit.