CN115405454B - Multifunctional mixed-flow water turbine and automatic regulating system - Google Patents
Multifunctional mixed-flow water turbine and automatic regulating system Download PDFInfo
- Publication number
- CN115405454B CN115405454B CN202211065833.7A CN202211065833A CN115405454B CN 115405454 B CN115405454 B CN 115405454B CN 202211065833 A CN202211065833 A CN 202211065833A CN 115405454 B CN115405454 B CN 115405454B
- Authority
- CN
- China
- Prior art keywords
- draft tube
- section
- elbow
- side wall
- diagonal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 67
- 230000001105 regulatory effect Effects 0.000 title claims abstract description 9
- 238000009792 diffusion process Methods 0.000 claims abstract description 38
- 238000012544 monitoring process Methods 0.000 claims abstract description 27
- 230000010349 pulsation Effects 0.000 claims abstract description 24
- 238000012545 processing Methods 0.000 claims abstract description 20
- 230000005540 biological transmission Effects 0.000 claims abstract description 4
- 230000000903 blocking effect Effects 0.000 claims description 11
- 239000000523 sample Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000012806 monitoring device Methods 0.000 claims 1
- 238000013461 design Methods 0.000 abstract description 12
- 238000005452 bending Methods 0.000 description 13
- 238000011161 development Methods 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 230000009467 reduction Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000005192 partition Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000003750 conditioning effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012552 review Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B3/00—Machines or engines of reaction type; Parts or details peculiar thereto
- F03B3/16—Stators
- F03B3/18—Stator blades; Guide conduits or vanes, e.g. adjustable
- F03B3/186—Spiral or volute casings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B11/00—Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B11/00—Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator
- F03B11/008—Measuring or testing arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B11/00—Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator
- F03B11/04—Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator for diminishing cavitation or vibration, e.g. balancing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B15/00—Controlling
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B3/00—Machines or engines of reaction type; Parts or details peculiar thereto
- F03B3/16—Stators
- F03B3/18—Stator blades; Guide conduits or vanes, e.g. adjustable
- F03B3/183—Adjustable vanes, e.g. wicket gates
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Abstract
The invention discloses a multifunctional mixed-flow water turbine and an automatic regulating system, comprising an inflow assembly, a flow regulating assembly, a control assembly and a control assembly, wherein the inflow assembly comprises an inflow volute, a guide vane zone connected with an outlet of the inflow volute, a runner zone connected with an outlet of the guide vane zone, and an overflow assembly connected with the runner zone; and the control assembly comprises a water retaining cover plate and a guide plate arranged on the water retaining cover plate. The monitoring unit comprises a pressure pulsation sensor, a flow velocity monitoring sensor and an angle measuring sensor, the processing unit comprises a singlechip, the control unit comprises a transmission gear, and the display unit is a display screen. According to the invention, the water conservancy stability of the draft tube is improved by limiting the first inclination angle alpha and the second inclination angle beta through the special radian design of the draft tube of the oblique elbow section and the oblique elbow diffusion section; through setting up manger plate apron and guide plate, reduce the inside swirl flow intensity of draft tube again to can adjust pressure pulsation according to the operating mode.
Description
Technical Field
The invention belongs to the field of hydraulic and hydroelectric engineering, and particularly relates to a multifunctional mixed-flow water turbine and an automatic regulating system.
Background
In recent years, in order to realize the high-proportion development of renewable energy sources, china proposes to build a water-wind-solar integrated renewable energy source development base on the basis of a cascade hydropower station so as to realize the national strategic goals of carbon reaching peaks and carbon neutralization. In the water-wind-solar cooperative development, the water and electricity play a role in stabilizing the power generation output, so that more operation under non-design working conditions is needed to be carried out according to new energy power generation and power grid power consumption requirements. When the hydraulic generator operates under the non-design working condition, a series of problems affecting the hydraulic stability can occur, particularly cavitation vortex strips can be generated in the draft tube, so that the hydraulic generator set has the problems of pressure pulsation and hydraulic vibration, and the output stability, the abrasion of components and the operation safety are affected.
In order to improve the flow state inside the water turbine, current solutions such as ventilation from the runner cone, installation of fins, adding the cone, etc. have problems in solving the hydraulic stability problem of part of the draft tube, such as decreasing the efficiency of the water turbine or playing a role in enhancing the pressure pulsation under the design conditions, so that the water turbine components are subjected to excessive hydraulic wear. Therefore, the hydraulic turbine runs under the non-design working condition, not only can the hydraulic stability be met, but also the pressure pulsation is controlled and regulated, and the hydraulic turbine is a problem to be solved currently.
Disclosure of Invention
This section is intended to outline some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section as well as in the description summary and in the title of the application, to avoid obscuring the purpose of this section, the description summary and the title of the invention, which should not be used to limit the scope of the invention.
The present invention has been made in view of the above and/or problems occurring in existing turbines that are not designed for use.
It is, therefore, an object of the present invention to provide a multifunctional francis turbine which can contribute to improvement of flow state inside the turbine, reduction of pressure pulsation, reduction of strength of swirling flow inside a draft tube, improvement of hydraulic stability, and reduction of pressure pulsation.
In order to solve the technical problems, the invention provides the following technical scheme: a multifunctional mixed-flow water turbine comprises,
the inflow assembly comprises an inflow volute, a guide vane zone connected with an outlet of the inflow volute, a runner zone connected with an outlet of the guide vane zone, and an overcurrent assembly connected with the runner zone; the method comprises the steps of,
the control assembly comprises a water retaining cover plate and a guide plate rotatably arranged on the water retaining cover plate.
As a preferable scheme of the multifunctional francis turbine of the present invention, wherein: the inflow volute comprises a first inflow channel and a second inflow channel, the inlet of the first inflow channel is centrosymmetric with the inlet of the second inflow channel, and the tail ends of the first inflow channel and the second inflow channel are respectively provided with a baffle plate.
As a preferable scheme of the multifunctional francis turbine of the present invention, wherein: the overflow assembly comprises an inclined elbow section draft tube, the inclined elbow section draft tube comprises an inclined elbow section draft tube inlet, an inclined elbow section draft tube outlet, an inclined elbow section draft tube inner curved side wall and an inclined elbow section draft tube outer curved side wall, the inclined elbow section draft tube inlet is connected with the outlet of the rotating wheel area, the inclined elbow section draft tube outlet is connected with an inclined curved diffusion section draft tube, and the inclined curved diffusion section draft tube (comprising an inclined curved diffusion section draft tube inlet, an inclined curved diffusion section draft tube outlet, an inclined curved diffusion section draft tube inner curved side wall and an inclined curved diffusion section draft tube outer curved side wall).
As a preferable scheme of the multifunctional francis turbine of the present invention, wherein: the side wall of the inner bend of the inclined elbow section draft tube, the side wall of the outer bend of the inclined elbow section draft tube, the side wall of the inner bend of the inclined bend diffusion section draft tube and the side wall of the outer bend of the inclined bend diffusion section draft tube all adopt a stable curve equation, and the stable curve equation is: y=b+ (a-b)/(1+ (x/c) d ) Wherein a, b, c and d are all constants to be determined.
As a preferable scheme of the multifunctional francis turbine of the present invention, wherein: the difference of the slope of the curve at the junction of the inner curved side wall of the inclined elbow section draft tube and the inner curved side wall of the inclined elbow section draft tube is less than 5%, and the difference of the slope of the curve at the junction of the outer curved side wall of the inclined elbow section draft tube and the outer curved side wall of the inclined elbow section draft tube is less than 5%.
As a preferable scheme of the multifunctional francis turbine of the present invention, wherein: the cross section midpoint of the inlet of the draft tube of the oblique elbow section and the cross section midpoint of the outlet of the draft tube of the oblique elbow section form a first inclined angle alpha in the vertical direction, the cross section midpoint of the inlet of the draft tube of the oblique elbow section and the cross section midpoint of the outlet of the draft tube of the oblique elbow section form a second inclined angle beta in the horizontal direction, the cross section midpoint of the inlet of the draft tube of the oblique elbow section and the cross section midpoint of the outlet of the draft tube of the oblique elbow section are in a horizontal coordinate difference value delta X1 and a vertical coordinate difference value delta Z1, the cross section midpoint of the inlet of the draft tube of the oblique elbow section and the cross section midpoint of the outlet of the draft tube of the oblique elbow section are in a horizontal coordinate difference value delta X2 and a vertical coordinate difference value delta Z2, and the calculation formulas of the first inclined angle alpha and the second inclined angle beta are as follows:
as a preferable scheme of the multifunctional francis turbine of the present invention, wherein: the water retaining cover plate is arranged at the upper end of the side wall of the inclined elbow section draft tube, a motor is arranged at the upper end of one side of the water retaining cover plate, and a transmission gear is arranged in the middle of the water retaining cover plate in a penetrating mode. The bottom of the water retaining cover plate is provided with a water stopping device and an inlet hole
As a preferable scheme of the multifunctional francis turbine of the present invention, wherein: the guide plate is connected with the guide gear, a sealing nut is arranged at the end head of one end of the guide plate, and a reserved passage and a reserved opening are further arranged on the guide plate.
Another object of the present invention is to provide an automatic adjustment system for pressure pulsation of a water turbine, which can help to monitor internal pressure pulsation of a draft tube, adjust rotation angle of a deflector according to pressure pulsation condition, and avoid excessive hydraulic wear of parts of the water turbine;
in order to solve the technical problems, the invention provides the following technical scheme: an automated conditioning system comprising a multi-functional francis turbine; and the processing unit is connected with the output end of the monitoring unit, the control unit is connected with the output end of the processing unit, and the display unit is connected with the output ends of the monitoring unit, the processing unit and the control unit.
As a preferable scheme of the multifunctional francis turbine of the present invention, wherein: the monitoring unit comprises a pressure pulsation sensor, a flow velocity monitoring sensor, a goniometer sensor and a probe of the pressure pulsation sensor and the flow velocity monitoring sensor is arranged in a reserved opening, the processing unit comprises a singlechip and a water retaining cover plate, the control unit comprises an adjusting transmission gear and a water retaining cover plate, the control unit is an electronic display screen and is arranged on the outer side of the water retaining cover plate.
One of the beneficial effects of the invention is that: the inflow volute is arranged, so that water flows are uniformly and symmetrically distributed; the special radian design of the inclined elbow section draft tube and the inclined elbow diffusion section draft tube reduces the vortex intensity flowing out of the rotating wheel area and avoids cavitation vortex belt; by limiting the first inclination angle alpha and the second inclination angle beta, the hydraulic stability of the draft tube is improved; through setting up manger plate apron and guide plate, reduce the inside swirl flow intensity of draft tube again to can adjust pressure pulsation according to the operating mode.
The invention has another beneficial effect: through setting up automatic governing system, monitor draft tube inside pressure pulsation for guide plate rotation angle can be adjusted according to the pressure pulsation condition, avoids the too big hydraulic wear of hydraulic turbine part.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Wherein:
fig. 1 is a schematic view showing the overall structure of a multifunctional francis turbine according to a first embodiment of the present invention.
Fig. 2 is a schematic view of an inflow volute according to a first embodiment of the invention.
Fig. 3 is a schematic diagram of a first inclination angle α and a second inclination angle β according to a second embodiment of the present invention.
Fig. 4 is a schematic front view of a water blocking cover plate and a deflector according to a third embodiment of the present invention.
Fig. 5 is a schematic side view of a water blocking cover plate and a deflector according to a third embodiment of the present invention.
Fig. 6 is a schematic front view and a schematic right view of a baffle according to a third embodiment of the present invention.
FIG. 7 is a schematic diagram of the system of units of an automated conditioning system according to a fourth embodiment of the present invention.
Detailed Description
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present invention is not limited to the specific embodiments disclosed below.
Further, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic can be included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
Further, in describing the embodiments of the present invention in detail, the cross-sectional view of the device structure is not partially enlarged to a general scale for convenience of description, and the schematic is only an example, which should not limit the scope of protection of the present invention. In addition, the three-dimensional dimensions of length, width and depth should be included in actual fabrication.
Example 1
Referring to fig. 1-2, a first embodiment of the present invention provides a multi-functional francis turbine, comprising an inflow assembly 100 including an inflow volute 101, a vane region 102 connected to an outlet of the inflow volute 101, a runner region 103 connected to an outlet of the vane region 102, and an over-flow assembly 200 connected to the runner region 103; and a control assembly 300, wherein the control assembly 300 comprises a water blocking cover plate 301 and a guide plate 302 rotatably arranged on the water blocking cover plate 301.
Specifically, the inflow volute 101 includes a first inflow channel 101a and a second inflow channel 101b, an inlet of the first inflow channel 101a and an inlet of the second inflow channel 101b are in central symmetry, and end parts of the first inflow channel 101a and the second inflow channel 101b are respectively provided with a partition plate 101c.
With reference to fig. 1 to 2, the specific manufacturing of the present invention is as follows: the two sections of draft tubes of the inflow volute 101 are in a metal volute form, a concrete structure is poured outside, and the thickness of the metal volute is designed according to the pressure value inside the draft tube under the design head of the water turbine; the inlets of the first inflow channel 101a and the second inflow channel 101b of the inflow volute are centrosymmetric, and any centrosymmetric cross-section of the two-section volute draft tube is equal in size, for example, the cross-section of the first inflow channel 101a of the inflow volute is the same as the cross-section of the second inflow channel 101 b. The first inflow channel 101a is separated from the water flow of the second inflow channel 101b at the tail end through a partition plate 101c, and the second inflow channel 101b is separated from the water flow of the first inflow channel 101a at the tail end through the partition plate 101c, so that the water flows of the two sections of volute draft tubes are not mutually interfered; the outlet wrap angles of the first inflow channel 101a and the second inflow channel 101b are 180 degrees, so that water is uniformly supplied to the runner region 103, flows to the runner region 103 through the guide vane region 102, flows into the inlet 201a of the draft tube elbow-inclined section draft tube 201, and finally flows out of the elbow-inclined section draft tube outlet 201 b.
The design of the bidirectional draft tube of the inflow volute can increase the reference flow, further reduce the cross section size of the volute, reduce the weight of the metal volute, reduce the construction difficulty of the volute, enable the water flow flowing into the guide vane area and the turbine runner area to be more uniform and symmetrically distributed, and reduce the influence of uneven water flow at the volute on the swirling vortex of the draft tube.
Example 2
Referring to fig. 1 to 3, for the second embodiment of the present invention, this embodiment is based on the previous embodiment: the flow-through assembly 200 comprises a diagonal elbow section draft tube 201, the diagonal elbow section draft tube 201 comprising a diagonal elbow section draft tube inlet 201a, a diagonal elbow section draft tube outlet 201b, a diagonal elbow section tailThe water pipe inner bending side wall 201c and the inclined elbow section draft tube outer bending side wall 201d, the inclined elbow section draft tube inlet 201a is connected with the outlet of the runner area 103, the inclined elbow section draft tube outlet 201b is connected with the inclined bending diffusion section draft tube 202, and the inclined bending diffusion section draft tube 202 comprises an inclined bending diffusion section draft tube inlet 202a, an inclined bending diffusion section draft tube outlet 202b, an inclined bending diffusion section draft tube inner bending side wall 202c and an inclined bending diffusion section draft tube outer bending side wall 202d. The inner curved side wall 201c of the inclined elbow section draft tube, the outer curved side wall 201d of the inclined elbow section draft tube, the inner curved side wall 202c of the inclined curved diffusion section draft tube and the outer curved side 202d of the inclined curved diffusion section draft tube all adopt stable curve equations, and the stable curve equations are as follows: y=b+ (a-b)/(1+ (x/c) d ) Wherein a, b, c and d are all constants to be determined.
The difference of the slope of the curve at the junction of the inner curved side wall 201c of the draft tube of the elbow-bending section and the inner curved side wall 202c of the draft tube of the diffusion section is less than 5%, and the difference of the slope of the curve at the junction of the outer curved side wall 201d of the draft tube of the elbow-bending section and the outer curved side wall 202d of the draft tube of the diffusion section is less than 5%.
The first inclination angle alpha is formed by the connecting line of the cross section midpoint of the inclined elbow section draft tube inlet 201a and the cross section midpoint of the inclined elbow section draft tube outlet 201b in the vertical direction, the second inclination angle beta is formed by the connecting line of the cross section midpoint of the inclined elbow diffusion section draft tube inlet 202a and the cross section midpoint of the inclined elbow diffusion section draft tube outlet 202b in the horizontal direction, the difference value of the cross section midpoint of the inclined elbow section draft tube inlet 201a and the cross section midpoint of the inclined elbow section draft tube outlet 201b is delta X1, the difference value of the vertical coordinates is delta Z1, the difference value of the cross section midpoint of the inclined elbow diffusion section draft tube inlet 202a and the cross section midpoint of the inclined elbow diffusion section draft tube outlet 202b is delta X2, the difference value of the vertical coordinates is delta Z2, and the calculation formulas of the first inclination angle alpha and the second inclination angle beta are:
specifically, the inclined elbow section draft tube is formed by adopting a metal lining, concrete is poured outside the inclined elbow section draft tube, and the thickness of the metal lining is designed according to the pressure value inside the draft tube under the design head of the water turbine; and forming the inclined bending diffusion section draft tube by a mould, then pouring concrete outside, and removing the mould after the concrete is solidified.
Specifically, the stability curve equation y=b+ (a-b)/(1+ (x/c) d ) The values of a, b, c and d in (a) and (b) can be obtained as follows according to the inclination degrees of the first inclination angle alpha and the second inclination angle beta:
preferably, the first inclination angle alpha is 33-36 degrees, the second inclination angle beta is 20-23 degrees, and the function of better improving the flow instability of the draft tube can be achieved, namely the reduction of the integral pressure pulsation amplitude of the draft tube can reach 42.7%, and the maximum efficiency can be improved by 0.65%.
Further, the difference of the slope of the curve at the junction of the bent side wall 201c of the bent draft tube and the bent side wall 202c of the bent diffusion draft tube is less than 5%, and the difference of the slope of the curve at the junction of the bent side wall 201d of the bent draft tube and the bent side wall 202d of the bent diffusion draft tube is less than 5%. The outlet of the inclined elbow section draft tube is connected with the inlet of the inclined elbow diffusion section draft tube, and the curve intersection angle of the connection part is within 5 degrees, so that the average flow velocity difference of the sections before and after the intersection is within 5 percent, and the water flow direction in the inclined elbow draft tube is changed from nearly vertical to downward to nearly horizontal to rightward after passing through the inclined elbow section draft tube.
The result of the related numerical simulation test shows that under the condition of the curve radian or curve rate of the invention, the length and the volume of the vortex belt of the draft tube are reduced by more than half, and the maximum amplitude reduction percentage of the pressure pulsation at the draft tube can reach 51.4%.
Example 3
Referring to fig. 4 and 5, this embodiment is based on the previous embodiment, which is a third embodiment of the present invention: the water retaining cover plate 301 is arranged at the upper end of the side wall of the inclined elbow section draft tube 201, a motor 303 is arranged at the upper end of one side of the water retaining cover plate 301, a conducting gear 304 is arranged in the middle of the water retaining cover plate 301 in a penetrating mode, a water stopping device and an inlet hole are formed in the bottom of the water retaining cover plate 301, the conducting gear 304 is connected with a guide plate 302, a sealing nut is arranged at the end head of one end of the guide plate 302, and a reserved channel 306 and a reserved opening 307 are further formed in the guide plate 302.
Specifically, the inlet hole is arranged on the upstream side of the inclined elbow section draft tube 201, the section is in the shape of a gate, the distance h1 between the top of the inlet hole and the inlet 201a of the inclined elbow section draft tube is 1.25-2.50 times of the height h2 of the inlet hole, and the value of the width of the inlet hole can be 0.5-0.8h 1; the water retaining cover plate 301 is arranged on the inlet hole, the cross section shape of the water retaining cover plate is the shape of a gate hole, the water retaining cover plate comprises a double-layer structure, the cross section size of the inner protruding part is the same as that of the inlet hole, and the outer cross section size is about 50-100mm greater than that of the inner cross section; a water stopping device and a connecting fixed lock catch are arranged between the water blocking cover plate 301 and the inlet hole; the water stopping device adopts rubber for stopping water, and the thickness is within the range of 5-10 mm.
Specifically, an adjustable guide plate 302 is arranged on the water blocking cover plate 301, the section of the guide plate is wing-shaped to reduce the water flow resistance along the length direction of the guide plate, the guide plate structure 302 is connected with a conducting gear 304, and the conducting gear 304 is driven to rotate by an external motor 303, so that the precise rotation of the guide plate 302 is realized; the baffle 302 can rotate 30 ° maximally clockwise or counterclockwise about the baffle pivot, and the baffle pivot is watertight using a sealing nut.
Specifically, the ratio of the width of the deflector structure 302 to the diameter of the elbow-shaped draft tube inlet 201a is between 1/15 and 1/30, the ratio of the length to the diameter of the elbow-shaped draft tube inlet 201a is between 1/2 and 3/4, the maximum thickness is between 2mm and 5mm, and the ellipticity of the end is between 1/2 and 1/3;
example 4
Referring to fig. 6, a fourth embodiment of the present invention provides an automatic regulating system, which is characterized by comprising a multifunctional francis turbine; and the monitoring unit 401, the processing unit 402, the control unit 403 and the display unit 404, wherein the processing unit 402 is connected with the output end of the monitoring unit 401, the control unit 403 is connected with the output end of the processing unit 402, and the display unit 404 is connected with the output ends of the monitoring unit 401, the processing unit 402 and the control unit 403. The monitoring unit 401 includes pressure pulsation sensor, velocity of flow monitoring sensor, angle measurement sensor, sets up on the guide plate 302, and pressure pulsation sensor, velocity of flow monitoring sensor's probe sets up in reserving mouth 306, and processing unit 402 includes the singlechip, sets up on manger plate apron 301, and the control unit 403 is including adjusting the conduction gear, setting on manger plate apron 301, display element 404 is electronic display screen, sets up in manger plate apron 301's outside.
Specifically, the model of the singlechip is MC68HC11A8.
Specifically, a hydraulic pressure sensor and a flow rate monitoring sensor are installed at the lower part of the deflector 302, and a hydraulic pressure sensor probe and a flow rate monitoring sensor probe are installed in a reserved port 307 and are connected with an external receiving device through a reserved channel 306; the gap between the reserved opening 307 and the hydraulic pressure sensor probe and the gap between the reserved opening and the hydraulic pressure sensor probe are sealed through strong waterproof glue, so that the leakage-stopping effect is achieved.
The baffle structure 302 can adjust the included angle between the baffle structure and the vertical direction according to the direction of the velocity vector obtained by the flow velocity monitoring sensor, and can also automatically adjust according to the strength of the pressure pulsation obtained by the hydraulic pressure sensor.
The outside of the water retaining cover plate 301 is provided with an automatic monitoring and adjusting integrated device, the instrument information of which comprises the flow speed, the pressure and the current inclination angle of the guide plate, and whether the automatic adjustment or the manual adjustment can be switched;
further, the display unit 404, the monitoring unit 401 is configured to obtain an internal pressure value of the draft tube, a flow field speed vector and a current dip angle of the deflector, the monitoring unit 401 transmits data to the data processing unit 402, the processing unit 402 obtains a pressure pulsation amplitude through fast fourier transform, calculates an included angle between a tangential speed and a normal speed in the flow field, the processing unit 403 transmits the pressure pulsation amplitude, the included angle between the tangential speed and the normal speed to the control unit 403, and the control unit 403 determines a dip angle variation value of the deflector according to a signal of the data unit and executes a rotation instruction of the deflector according to an adjustment mode; the key information of the monitoring unit 401, the processing unit 402 and the control unit 403 are all transmitted to the display unit 404, so that the working personnel can check the current operation condition of the water turbine.
It is important to note that the construction and arrangement of the present application as shown in a variety of different exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters (e.g., temperature, pressure, etc.), mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter described in this application. For example, elements shown as integrally formed may be constructed of multiple parts or elements, the position of elements may be reversed or otherwise varied, and the nature or number of discrete elements or positions may be altered or varied. Accordingly, all such modifications are intended to be included within the scope of present invention. The order or sequence of any process or method steps may be varied or re-sequenced according to alternative embodiments. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present inventions. Therefore, the invention is not limited to the specific embodiments, but extends to various modifications that nevertheless fall within the scope of the appended claims.
Furthermore, in an effort to provide a concise description of the exemplary embodiments, all features of an actual implementation may not be described (i.e., those not associated with the best mode presently contemplated for carrying out the invention, or those not associated with practicing the invention).
It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort might be complex and time consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure.
It should be noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present invention may be modified or substituted without departing from the spirit and scope of the technical solution of the present invention, which is intended to be covered in the scope of the claims of the present invention.
Claims (3)
1. A multifunctional mixed-flow water turbine is characterized in that: comprising the steps of (a) a step of,
an inflow assembly (100) comprising an inflow volute (101), a vane section (102) connected to an outlet of the inflow volute (101), a rotor section (103) connected to an outlet of the vane section (102), an over-flow assembly (200) connected to the rotor section (103); the method comprises the steps of,
a control assembly (300), wherein the control assembly (300) comprises a water blocking cover plate (301) and a guide plate (302) rotatably arranged on the water blocking cover plate (301);
the inflow volute (101) comprises a first inflow channel (101 a) and a second inflow channel (101 b), wherein the inlet of the first inflow channel (101 a) and the inlet of the second inflow channel (101 b) are centrally symmetrical, and the tail ends of the first inflow channel (101 a) and the second inflow channel (101 b) are respectively provided with a baffle plate (101 c);
the flow-through assembly (200) comprises a diagonal elbow section draft tube (201), the diagonal elbow section draft tube (201) comprises a diagonal elbow section draft tube inlet (201 a), a diagonal elbow section draft tube outlet (201 b), a diagonal elbow section draft tube inner curved side wall (201 c) and a diagonal elbow section draft tube outer curved side wall (201 d), the diagonal elbow section draft tube inlet (201 a) is connected with the outlet of the runner zone (103), the diagonal elbow section draft tube outlet (201 b) is connected with a diagonal elbow diffusion section draft tube (202), and the diagonal elbow diffusion section draft tube (202) comprises a diagonal elbow diffusion section draft tube inlet (202 a), a diagonal elbow diffusion section draft tube outlet (202 b), a diagonal elbow diffusion section draft tube inner curved side wall (202 c) and a diagonal elbow diffusion section draft tube outer curved side wall (202 d);
the bent side wall (201 c) of the inclined elbow section draft tube, the bent side wall (201 d) of the inclined elbow section draft tube, the bent side wall (202 c) of the inclined elbow diffusion section draft tube and the bent side wall (202 d) of the inclined elbow diffusion section draft tube all adopt a stable curve equation, and the stable curve equation is: y=b+ (a-b)/(1+ (x/c) d), wherein a, b, c and d are all constants to be determined, x represents the coordinates of the curve along the x-axis, y represents the coordinates of the curve along the y-axis, x represents the horizontal direction, and y represents the vertical direction;
the difference of the slope of the curve at the joint of the inner curved side wall (201 c) of the inclined elbow section draft tube and the inner curved side wall (202 c) of the inclined curved diffusion section draft tube is less than 5%, and the difference of the slope of the curve at the joint of the outer curved side wall (201 d) of the inclined elbow section draft tube and the outer curved side wall (202 d) of the inclined curved diffusion section draft tube is less than 5%;
a first inclination angle alpha is formed in the vertical direction between the cross section midpoint of the inclined elbow section draft tube inlet (201 a) and the cross section midpoint of the inclined elbow section draft tube outlet (201 b), a second inclination angle beta is formed in the horizontal direction between the cross section midpoint of the inclined elbow section draft tube inlet (202 a) and the cross section midpoint of the inclined elbow section draft tube outlet (202 b), the difference value between the cross section midpoint of the inclined elbow section draft tube inlet (201 a) and the cross section midpoint of the inclined elbow section draft tube outlet (201 b) is DeltaX 1, the difference value between the vertical coordinates is DeltaZ 1, the difference value between the cross section midpoint of the inclined elbow section draft tube inlet (202 a) and the cross section midpoint of the inclined elbow section draft tube outlet (202 b) is DeltaX 2, the difference value between the vertical coordinates is DeltaZ 2, and the first inclination angle beta and the second inclination angle beta are calculated as:
、/>；
the water retaining cover plate (301) is arranged at the upper end of the side wall of the inclined elbow section draft tube (201), a motor (303) is arranged at the upper end of one side of the water retaining cover plate (301), a conducting gear (304) is arranged in the middle of the water retaining cover plate (301) in a penetrating mode, and a water stopping device and an inlet hole are formed in the bottom of the water retaining cover plate (301);
the guide plate (302) is connected to the guide gear (304), a sealing nut is arranged at the end head of one end of the guide plate (302) to the guide gear (304), and a reserved channel (306) and a reserved opening (307) are further arranged on the guide plate (302).
2. An automated hydraulic turbine tuning system comprising the multi-functional francis turbine of claim 1;
the intelligent monitoring device further comprises a monitoring unit (401), a processing unit (402), a control unit (403) and a display unit (404), wherein the processing unit (402) is connected with the output end of the monitoring unit (401), the control unit (403) is connected with the output end of the processing unit (402), and the display unit (404) is connected with the output ends of the monitoring unit (401), the processing unit (402) and the control unit (403).
3. The automatic water turbine regulating system according to claim 2, wherein the monitoring unit (401) comprises a pressure pulsation sensor, a flow rate monitoring sensor and an angle measuring sensor, the monitoring unit (401) is arranged on the guide plate (302), a probe of the pressure pulsation sensor and the flow rate monitoring sensor is arranged in the reserved opening (307), the processing unit (402) comprises a single chip microcomputer, the processing unit (402) is arranged on the water blocking cover plate (301), the control unit (403) comprises a regulating transmission gear, the control unit (403) is arranged on the water blocking cover plate (301), the display unit (404) is an electronic display screen, and the display unit (404) is arranged on the outer side of the water blocking cover plate (301).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211065833.7A CN115405454B (en) | 2022-08-31 | 2022-08-31 | Multifunctional mixed-flow water turbine and automatic regulating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211065833.7A CN115405454B (en) | 2022-08-31 | 2022-08-31 | Multifunctional mixed-flow water turbine and automatic regulating system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115405454A CN115405454A (en) | 2022-11-29 |
| CN115405454B true CN115405454B (en) | 2024-04-16 |
Family
ID=84163068
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211065833.7A Active CN115405454B (en) | 2022-08-31 | 2022-08-31 | Multifunctional mixed-flow water turbine and automatic regulating system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115405454B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204591564U (en) * | 2015-03-06 | 2015-08-26 | 西安理工大学 | A kind of Francis turbine with exit guide vane |
| CN106968875A (en) * | 2017-05-31 | 2017-07-21 | 国家电网公司 | Pump turbine gate positing measurement apparatus and method |
| CN109441691A (en) * | 2018-10-12 | 2019-03-08 | 西北农林科技大学 | A kind of draft tube band cowling panel Francis turbine |
| CN111550347A (en) * | 2020-04-10 | 2020-08-18 | 王涛 | Axial flow water turbine with high power generation efficiency |
| CN111594369A (en) * | 2020-05-11 | 2020-08-28 | 河海大学 | Mixed-flow water turbine with double-inlet volute suitable for cooling tower |
| CN113915045A (en) * | 2021-10-18 | 2022-01-11 | 扬州大学 | Mixed-flow water turbine draft tube with inclined curved cone |
-
2022
- 2022-08-31 CN CN202211065833.7A patent/CN115405454B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204591564U (en) * | 2015-03-06 | 2015-08-26 | 西安理工大学 | A kind of Francis turbine with exit guide vane |
| CN106968875A (en) * | 2017-05-31 | 2017-07-21 | 国家电网公司 | Pump turbine gate positing measurement apparatus and method |
| CN109441691A (en) * | 2018-10-12 | 2019-03-08 | 西北农林科技大学 | A kind of draft tube band cowling panel Francis turbine |
| CN111550347A (en) * | 2020-04-10 | 2020-08-18 | 王涛 | Axial flow water turbine with high power generation efficiency |
| CN111594369A (en) * | 2020-05-11 | 2020-08-28 | 河海大学 | Mixed-flow water turbine with double-inlet volute suitable for cooling tower |
| CN113915045A (en) * | 2021-10-18 | 2022-01-11 | 扬州大学 | Mixed-flow water turbine draft tube with inclined curved cone |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115405454A (en) | 2022-11-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101327340B1 (en) | Direct-connection low-speed small mixed-flow hydroturbine for hydrodynamic energy-saving cooling tower | |
| CN100572677C (en) | A kind of flood discharging method and flood discharging tunnel that adopts eddy flow and strong moisture mixing energy dissipation | |
| CN101796309A (en) | Vortex flow control device | |
| CN106918369B (en) | A kind of device and measurement method for hydropower station pressure main conduit flow measurement | |
| CN115405454B (en) | Multifunctional mixed-flow water turbine and automatic regulating system | |
| Arndt et al. | Hydraulic turbines | |
| CN103743257B (en) | Efficient hydrodynamic cooling tower | |
| JPWO2010143709A1 (en) | Hydroelectric generator | |
| CN111594369A (en) | Mixed-flow water turbine with double-inlet volute suitable for cooling tower | |
| Fluri | Turbine layout for and optimization of solar chimney power conversion units | |
| CN113915045A (en) | Mixed-flow water turbine draft tube with inclined curved cone | |
| CN111535973A (en) | Low specific speed double-inlet volute mixed-flow water turbine suitable for cooling tower | |
| Jia et al. | Study on hump characteristics of pump turbine with different guide vane exit angles | |
| CN111535974A (en) | Low-water-head large-flow mixed-flow water turbine with double-inlet volute | |
| CN211424516U (en) | Water mixer | |
| Patel et al. | Hydrodynamic Performance Investigation of Horizontal Axis Water Rotors | |
| CN109630466A (en) | One kind disappears vortex method and its application for the correction of low-lift-head pumping station outlet passage | |
| CN219412770U (en) | Small-size hydroelectric power generation structure | |
| CN106089546B (en) | A kind of water conservancy diversion for tidal power generating and automatic sink-float device | |
| Cao et al. | Velocity and pressure distributions in discharge tunnel of rotary-obstruction composite inner energy dissipation | |
| CN113089603A (en) | Vertical shaft rotational flow flood discharge tunnel | |
| CN106121893B (en) | A kind of impeller system absorbing water energy | |
| CN207583548U (en) | A kind of group-wise generating equipment | |
| CN206513492U (en) | A kind of shaft tubular formula hydraulic turbine | |
| JP2019173597A (en) | Water turbine and small hydroelectric generator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |