CN116201709B - Integrated hydraulic pump-motor energy recovery unit without sliding shoes - Google Patents
Integrated hydraulic pump-motor energy recovery unit without sliding shoes Download PDFInfo
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- CN116201709B CN116201709B CN202310352656.9A CN202310352656A CN116201709B CN 116201709 B CN116201709 B CN 116201709B CN 202310352656 A CN202310352656 A CN 202310352656A CN 116201709 B CN116201709 B CN 116201709B
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- motor
- pump
- swash plate
- pump end
- plunger
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- 238000011084 recovery Methods 0.000 title claims abstract description 35
- 230000005540 biological transmission Effects 0.000 claims abstract description 6
- 230000007246 mechanism Effects 0.000 claims description 60
- 238000007667 floating Methods 0.000 claims description 41
- 210000004907 gland Anatomy 0.000 claims description 17
- 238000004891 communication Methods 0.000 claims description 12
- 239000000758 substrate Substances 0.000 claims description 12
- 239000013535 sea water Substances 0.000 abstract description 21
- 239000012267 brine Substances 0.000 abstract description 16
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 abstract description 16
- 238000001223 reverse osmosis Methods 0.000 abstract description 10
- 239000012528 membrane Substances 0.000 abstract description 9
- 230000010354 integration Effects 0.000 abstract description 6
- 150000003839 salts Chemical class 0.000 abstract description 3
- 230000007547 defect Effects 0.000 abstract description 2
- 239000012530 fluid Substances 0.000 abstract description 2
- 238000010612 desalination reaction Methods 0.000 description 9
- 239000007788 liquid Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 9
- 238000006073 displacement reaction Methods 0.000 description 5
- 238000005265 energy consumption Methods 0.000 description 4
- 239000000956 alloy Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 239000013505 freshwater Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000010349 pulsation Effects 0.000 description 2
- 239000004696 Poly ether ether ketone Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- JUPQTSLXMOCDHR-UHFFFAOYSA-N benzene-1,4-diol;bis(4-fluorophenyl)methanone Chemical compound OC1=CC=C(O)C=C1.C1=CC(F)=CC=C1C(=O)C1=CC=C(F)C=C1 JUPQTSLXMOCDHR-UHFFFAOYSA-N 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920002530 polyetherether ketone Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000000108 ultra-filtration Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F04B1/20—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
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- 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
- F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
- F03C1/00—Reciprocating-piston liquid engines
- F03C1/02—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders
- F03C1/06—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis
- F03C1/0636—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Reciprocating Pumps (AREA)
Abstract
The invention discloses an integrated skid-free hydraulic pump-motor energy recovery unit, which belongs to the technical field of fluid transmission and control and comprises an axial swash plate hydraulic pump and an axial swash plate hydraulic motor. When the invention works, the motor drives the hydraulic pump to suck raw seawater and boost the pressure, the generated high-pressure seawater is filtered by the reverse osmosis membrane to become high-pressure strong brine, the high-pressure strong brine enters the hydraulic motor, and the high-pressure strong brine is discharged through the low-pressure strong brine outlet after the energy recovery process is completed. The invention not only reduces two pairs of friction pairs in the traditional swash plate type plunger pump-motor, but also solves the problems of unbalanced pressure at two sides of a middle turntable and overlarge device vibration and easy failure of a synchronizing pin caused by oblique arrangement of a cylinder body due to mirror symmetry arrangement, overcomes the defects of low integration level, more friction pairs, salt/seawater mixing and the like of the traditional energy recovery device, and has the obvious technical advantages of high energy recovery efficiency, no mixing, low vibration, stable operation, long service life and the like.
Description
Technical Field
The invention belongs to the technical field of fluid transmission and control, and particularly relates to an integrated hydraulic pump-motor energy recovery unit without a sliding shoe.
Background
With the increasing decrease of fresh water resources, the worldwide utilization of sea water desalination technology to produce fresh water has become an effective method for alleviating the shortage problem of water resources. Seawater desalination technology includes more than twenty methods, and reverse osmosis membrane is one of the most widely used methods. This method, also called ultrafiltration, is a technique of membrane separation desalination using a semipermeable membrane, and filters salt in seawater by means of a membrane that allows only solvent to pass therethrough and does not allow solute to pass therethrough. Compared with the traditional sea water desalination technologies such as distillation, the reverse osmosis membrane method has the advantages of high water quality, low energy consumption, simple operation and the like.
In the reverse osmosis sea water desalination process, more than half of the pressure energy provided by the high-pressure pump is stored in the high-pressure strong brine filtered by the reverse osmosis membrane, and if the pressure energy is not reasonably utilized, a large amount of energy is wasted, so that the running cost of the system is increased. The energy recovery device can be used for recovering the pressure energy and converting the pressure energy into mechanical energy or electric energy for driving a high-pressure pump or other equipment, so that the energy consumption and the running cost of the system are obviously reduced, and the running efficiency and the sustainability are improved.
The energy recovery device can be divided into three types according to the structure and the working principle: hydraulic turbine, positive displacement and pump motor. In the working process of the hydraulic turbine type energy recovery device, energy is converted from pressure energy to mechanical energy to pressure energy, and the upper limit of energy conversion efficiency is low. The positive displacement energy recovery device can directly realize the pressurization of high-pressure strong brine to low-pressure seawater, and the energy recovery efficiency can reach 96 percent, but has natural technical defects, and the problem of mixing the high-pressure strong brine and the low-pressure seawater cannot be avoided. In recent years, the miniaturization and integration demands of sea water desalination systems drive a pump motor energy recovery device, which converts hydraulic energy contained in high-pressure strong brine into mechanical energy through a motor so as to compensate the output power of a driving motor. Compared with other two energy recovery devices, the pump motor type energy recovery device has the advantages of high integration level, small volume, light weight, no mixing, high energy recovery efficiency and the like, and has great application potential and market prospect.
Chinese patent (CN 111022281A) discloses a 'low friction pair sea water desalination high-pressure pump and energy recovery integrated unit', the device realizes pump motor integration, a pump end provides pressure for a reverse osmosis system, a motor end recovers high-pressure strong brine pressure energy, the device reduces two pairs of sliding shoe pairs, and the energy recovery efficiency is improved. However, the device has the problem that the stress of the pump end and the motor end is unbalanced, so that the middle turntable bears larger overturning moment, and the synchronizing pin on the main shaft drives the cylinder body to rotate, so that the load is overlarge, the synchronizing pin is easy to fail, and the design principle of the device has certain limitation, so that the service life of the device is shorter.
Disclosure of Invention
The invention aims to provide an integrated skid-free hydraulic pump-motor energy recovery unit so as to solve the problems in the prior art.
In order to achieve the above purpose, the invention provides an integrated skid-free hydraulic pump-motor energy recovery unit, which comprises a shell and a main shaft, wherein the shell and the main shaft are coaxially arranged, an intermediate swash plate substrate is sleeved on the main shaft, a plurality of synchronizing pins are arranged on the main shaft at equal intervals along the circumferential direction, the intermediate swash plate substrate is in limit fit with the main shaft through the synchronizing pins, pump end cylinder bodies and motor cylinder bodies are respectively arranged on two sides of the intermediate swash plate substrate, the pump end cylinder bodies and the motor cylinder bodies are in limit transmission fit with the main shaft, and the intermediate swash plate substrate, the pump end cylinder bodies and the motor cylinder bodies are in rotary connection with the inside of the shell;
a plurality of pump end plunger mechanisms are arranged in the pump end cylinder body at equal intervals along the circumferential direction of the main shaft, a plurality of motor plunger mechanisms are arranged in the Ma Dagang body at equal intervals along the circumferential direction of the main shaft, the pump end plunger mechanisms and the motor plunger mechanisms are hinged with the middle swash plate base body, and the pump end plunger mechanisms and the motor plunger mechanisms are arranged in a one-to-one correspondence manner;
the pump end cylinder body is kept away from the one end of middle sloping cam plate base member the motor cylinder body is kept away from the one end of middle sloping cam plate base member all is provided with and divides the flow mechanism, the access & exit has all been seted up at the casing both ends, pump end plunger mechanism motor plunger mechanism respectively through two join in marriage the flow mechanism with the access & exit intercommunication at casing both ends.
Preferably, the shell comprises a pump end cover rotatably sleeved on the main shaft, the pump end cover is fixedly connected with a pump end shell, and the pump end cylinder body is rotatably connected in the pump end shell; one end of the main shaft is provided with a motor end cover, the main shaft is in clearance fit with the motor end cover, the motor end cover is fixedly connected with a motor shell, and the motor cylinder body is rotationally connected in the motor shell; the pump end shell is detachably connected with the motor shell through a flange, and the middle swash plate base body is in limit sliding fit with the inner wall of the pump end shell and the inner wall of the motor shell; the pump end cover and the motor end cover are provided with the inlet and the outlet.
Preferably, the pump end plunger mechanism comprises a pump end plunger bushing arranged in the pump end cylinder body, a pump end connecting rod plunger is slidably arranged in the pump end plunger bushing, a first hinge piece is arranged at one end, close to the middle swash plate base body, of the pump end connecting rod plunger, and the pump end connecting rod plunger is hinged with the middle swash plate base body through the first hinge piece; the pump end plunger bushing is far away from one end of the middle swash plate substrate and is provided with a pump end communication sleeve, and the pump end communication sleeve is communicated with an inlet and an outlet on the pump end cover through the flow distribution mechanism.
Preferably, the motor plunger mechanism comprises a motor end plunger bushing arranged in the motor cylinder body, a motor end connecting rod plunger is slidably arranged in the motor end plunger bushing, a second hinge piece is arranged at one end, close to the middle swash plate base body, of the motor end connecting rod plunger, and the motor end connecting rod plunger is hinged with the middle swash plate base body through the second hinge piece; the motor end plunger bushing is far away from one end of the middle swash plate substrate and is provided with a motor end plunger communication sleeve, and the motor end plunger communication sleeve is communicated with an inlet and an outlet on the motor end cover through the flow distribution mechanism.
Preferably, the first hinge member includes a pump end connecting rod, and a pump end connecting rod plunger ball socket is arranged at one end of the pump end connecting rod plunger, which is close to the middle swash plate base body; the second hinge piece comprises a motor end connecting rod, and a motor end connecting rod plunger ball socket is arranged at one end of the motor end connecting rod plunger, which is close to the middle swash plate base body; the two sides of the middle swash plate base body are respectively provided with a pump end middle swash plate ball socket and a motor end middle swash plate ball socket, the pump end connecting rod is respectively matched with the pump end connecting rod plunger ball socket and the pump end middle swash plate ball socket through the ball heads at the two ends of the pump end connecting rod, and the motor end connecting rod is respectively matched with the motor end connecting rod plunger ball socket and the motor end middle swash plate ball socket through the ball heads at the two ends of the motor end connecting rod.
Preferably, the flow distribution mechanism arranged at the pump end cover comprises a pump end flow distribution plate and a pump end floating lining plate which are sleeved on the main shaft in a sliding manner, the pump end flow distribution plate is detachably connected with the pump end cover, the pump end floating lining plate is in sliding fit with the pump end flow distribution plate, and the pump end floating lining plate is in limit fit with the pump end cylinder body; two circular arc-shaped distributing grooves are formed in one side, close to the pump end floating lining plate, of the pump end distributing plate, the two circular arc-shaped distributing grooves are respectively communicated with an inlet and an outlet on the pump end cover, the circular arc radiuses corresponding to the two circular arc-shaped distributing grooves are the same, a plurality of connecting holes are formed in the pump end floating lining plate along the circumferential direction, and a plurality of pump end plunger mechanisms are respectively communicated with the two circular arc-shaped distributing grooves through the plurality of connecting holes; the main shaft is sleeved with a pump end pre-tightening spring, and two ends of the pump end pre-tightening spring are respectively abutted to the pump end cylinder body and the pump end floating lining plate.
Preferably, the flow distribution mechanism arranged at the motor end cover comprises a motor end floating liner plate and a motor end flow distribution plate, the motor end flow distribution plate is detachably connected with the motor end cover, one end of the main shaft is in clearance fit with the motor end flow distribution plate, the motor end floating liner plate is slidably sleeved on the main shaft, the motor end floating liner plate is in sliding fit with the motor end flow distribution plate, and the motor end floating liner plate is in limit fit with the motor cylinder body; two circular arc-shaped flow distribution grooves are formed in one side, close to the motor end floating lining plate, of the motor end flow distribution plate, the two circular arc-shaped flow distribution grooves are respectively communicated with an inlet and an outlet on the motor end cover, the circular arc radiuses corresponding to the two circular arc-shaped flow distribution grooves are the same, a plurality of connecting holes are formed in the motor end floating lining plate along the circumferential direction, and a plurality of motor plunger mechanisms are respectively communicated with the two circular arc-shaped flow distribution grooves through the plurality of connecting holes; the motor end pre-tightening spring is sleeved on the main shaft, and two ends of the motor end pre-tightening spring are respectively abutted to the motor cylinder body and the motor end floating lining plate.
Preferably, pump end flat keys and motor end flat keys are respectively arranged on two sides of the middle swash plate base body, the pump end flat keys and the motor end flat keys are fixedly arranged on the main shaft, the pump end cylinder body is in limiting connection with the main shaft through the pump end flat keys, and the motor cylinder body is in limiting connection with the main shaft through the motor end flat keys.
Preferably, the inner wall of the pump end shell is provided with a large pump end cylinder outer bearing in an interference manner, and the pump end cylinder body is in clearance fit with the large pump end cylinder outer bearing; the inner wall of the motor shell is provided with a large bearing outside the motor end cylinder in an interference manner, and the motor cylinder body is in clearance fit with the large bearing outside the motor end cylinder; a chute is arranged between the pump end shell and the motor shell, an outer ring of a large intermediate swash plate bearing is installed in the chute in an interference manner, and an inner ring of the large intermediate swash plate bearing is installed on the intermediate swash plate base body in an interference manner; the two sides of the middle swash plate base body are respectively and detachably provided with a middle swash plate pump end ball socket gland and a middle swash plate motor end ball socket gland, and the inner ring of the middle swash plate large bearing is arranged between the middle swash plate pump end ball socket gland and the middle swash plate base body in a limiting way; the middle swash plate ball socket of the pump end is arranged on the middle swash plate base body in a limiting manner through the ball socket gland of the pump end of the middle swash plate, and the middle swash plate ball socket of the motor end is arranged on the middle swash plate base body in a limiting manner through the ball socket gland of the motor end of the middle swash plate.
Preferably, the number of the synchronizing pins is four, four pin grooves are formed in the middle swash plate base body at equal intervals along the circumferential direction, the four synchronizing pins are respectively arranged in the four pin grooves, and the axes of the middle swash plate base body, the synchronizing pins and the main shaft intersect at one point.
Compared with the prior art, the invention has the following advantages and technical effects:
1. high integration level and small occupied space. According to the invention, the hydraulic pump and the hydraulic motor are integrated, the pressurization and energy recovery processes of raw material seawater are realized through motor driving, and the integration level and the space utilization rate of the reverse osmosis seawater desalination system are greatly improved.
2. The friction pair number is small, and the energy recovery efficiency is high. Compared with the traditional hydraulic pump-motor type energy recovery device, the invention reduces two pairs of sliding shoe pairs, eliminates corresponding leakage loss and friction loss, and thus improves the mechanical efficiency and the energy recovery efficiency of the device.
3. Salt/seawater was not blended. The invention adopts the working principle of positive displacement energy recovery of the hydraulic pump and the motor, avoids the mixing phenomenon of high-pressure strong brine and raw seawater existing in the pressure exchange process of the rotary positive displacement energy recovery device, and further reduces the energy consumption of the system.
4. Has strong pollution resistance and long service life. The invention reduces two sliding shoe pairs which have poor pollution resistance and are easy to fail, other key friction pairs adopt a ceramic-hard alloy/ceramic hard-hard pairing scheme, the wear resistance and pollution resistance of the friction pairs are improved, and the service life of the device is prolonged.
5. The stress is balanced, and the overturning moment is small. According to the invention, through the central symmetry design, the high-pressure area of the pump end cylinder body is opposite to the high-pressure area of the motor cylinder body, the low-pressure area of the pump end cylinder body is opposite to the low-pressure area of the motor cylinder body, and the middle swash plate substrate is balanced in stress, so that the overturning moment borne by the middle swash plate substrate is greatly reduced, the reliability of the device is improved, and the service life is prolonged.
6. The structural design is reasonable, and the service life is long. Compared with a cylinder body inclined energy recovery device, the invention adopts the design of the parallel cylinder body and the middle sloping cam plate matrix, avoids the problem that the synchronizing pin is invalid due to the fact that the synchronizing pin drives the large-mass cylinder body to rotate and the problem that the device vibrates greatly because of bearing a large load, and enhances the bending resistance and shearing resistance of the synchronizing pin because the synchronizing pin is made of high-strength corrosion-resistant alloy materials, thereby greatly prolonging the service life of the device.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a left side view of the present invention;
FIG. 2 is a right side view of the present invention;
FIG. 3 is a cross-sectional view taken along line I-I of FIG. 1;
FIG. 4 is a schematic view of the overall structure of the port plate of the present invention;
fig. 5 is a top view of a port plate of the present invention;
FIG. 6 is a cross-sectional view taken along the direction A-A in FIG. 5;
FIG. 7 is a schematic view of the overall structure of the intermediate swash plate body of the present invention;
FIG. 8 is a schematic cross-sectional view of an intermediate swash plate body according to the present invention;
wherein, 1, a main shaft; 2. mechanical sealing; 3. a pump end cap; 4. a pump end port plate; 5. a pump end housing; 6. a pump end floating liner plate; 7. the pump end is communicated with the sleeve; 8. a pump end pre-tightening spring; 9. a pump end plunger bushing; 10. a pump end cylinder; 11. a pump end connecting rod plunger; 12. a large bearing outside the pump end cylinder; 13. a pump end flat key; 14. pump end connecting rod plunger ball socket; 15. a pump end connecting rod; 16. a ball gland at the pump end of the middle swash plate; 17. a synchronizing pin; 18. a pump end middle swash plate ball socket; 19. a large bearing of the middle swash plate; 20. an intermediate swash plate base; 21. a motor end intermediate swash plate ball socket; 22. a housing drain port; 23. a middle swash plate motor end ball gland; 24. a motor end link; 25. motor end connecting rod plunger ball socket; 26. a large bearing outside the motor end cylinder; 27. a motor end link plunger; 28. a motor end flat key; 29. a motor cylinder; 30. a motor end plunger bushing; 31. a motor end pre-tension spring; 32. the plunger at the motor end is communicated with the sleeve; 33. a motor end floating liner plate; 34. a motor end port plate; 35. a motor housing; 36. a motor end cap.
Detailed Description
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other. The described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art without the inventive effort, are intended to be within the scope of the present invention. The invention will be described in detail below with reference to the drawings in connection with embodiments.
As shown in fig. 1-8, the invention provides an integrated skid-free hydraulic pump-motor energy recovery unit, which comprises a shell and a main shaft 1 which are coaxially arranged, wherein an intermediate swash plate base body 20 is sleeved on the main shaft 1, a plurality of synchronizing pins 17 are arranged on the main shaft 1 at equal intervals along the circumferential direction, the intermediate swash plate base body 20 is in limit fit with the main shaft 1 through the synchronizing pins 17, two sides of the intermediate swash plate base body 20 are respectively provided with a pump end cylinder body 10 and a motor cylinder body 29, the pump end cylinder body 10 and the motor cylinder body 29 are in limit transmission fit with the main shaft 1, and the intermediate swash plate base body 20, the pump end cylinder body 10 and the motor cylinder body 29 are in rotary connection with the interior of the shell;
a plurality of pump end plunger mechanisms are arranged in the pump end cylinder body 10 at equal intervals along the circumferential direction of the main shaft 1, a plurality of motor plunger mechanisms are arranged in the motor cylinder body 29 at equal intervals along the circumferential direction of the main shaft 1, the pump end plunger mechanisms and the motor plunger mechanisms are hinged with the middle swash plate base body 20, and the pump end plunger mechanisms and the motor plunger mechanisms are arranged in a one-to-one correspondence manner;
the end of the pump end cylinder body 10 far away from the middle swash plate base body 20 and the end of the motor cylinder body 29 far away from the middle swash plate base body 20 are respectively provided with a flow distribution mechanism, the two ends of the shell are respectively provided with an inlet and an outlet, and the pump end plunger mechanism and the motor plunger mechanism are respectively communicated with the inlet and the outlet at the two ends of the shell through the two flow distribution mechanisms.
Further, in order to facilitate assembly and disassembly of the device, the housing comprises a pump end cover 3 rotatably sleeved on the main shaft 1, a pump end housing 5 is fixedly connected to the pump end cover 3, and a pump end cylinder body 10 is rotatably connected in the pump end housing 5; one end of the main shaft 1 is provided with a motor end cover 36, the main shaft 1 is in clearance fit with the motor end cover 36, a motor shell 35 is fixedly connected to the motor end cover 36, and the motor cylinder 29 is rotatably connected in the motor shell 35; the pump end shell 5 is detachably connected with the motor shell 35 through a flange, and the middle swash plate base body 20 is in limit sliding fit with the inner wall of the pump end shell 5 and the inner wall of the motor shell 35; the pump end cover 3 and the motor end cover 36 are provided with an inlet and an outlet.
Further, in order to facilitate the communication between the pump end plunger mechanism and the inlet and outlet on the pump end cover 3 through the flow distribution mechanism, the pump end plunger mechanism comprises a pump end plunger bushing 9 arranged in the pump end cylinder body 10, a pump end connecting rod plunger 11 is slidably mounted in the pump end plunger bushing 9, a first hinge member is mounted at one end of the pump end connecting rod plunger 11 close to the middle swash plate base 20, and the pump end connecting rod plunger 11 is hinged with the middle swash plate base 20 through the first hinge member; the pump end plunger bushing 9 is installed to the one end that keeps away from middle sloping cam plate base member 20 and is served the intercommunication cover 7, and pump end intercommunication cover 7 passes through the access & exit intercommunication on distributing mechanism and the pump end cover 3.
Further, to facilitate the communication of the motor plunger mechanism with the access port on the motor end cover 36 through the flow distribution mechanism, the motor plunger mechanism includes a motor end plunger bushing 30 disposed in the motor cylinder 29, a motor end link plunger 27 is slidably mounted in the motor end plunger bushing 30, a second hinge is mounted at one end of the motor end link plunger 27 near the intermediate swash plate base 20, and the motor end link plunger 27 is hinged with the intermediate swash plate base 20 through the second hinge; the motor end plunger bushing 30 is mounted at an end remote from the swashplate base 20 with a motor end plunger communication sleeve 32, the motor end plunger communication sleeve 32 communicating with an inlet and outlet on a motor end cap 36 through a flow distribution mechanism.
Further, in order to facilitate the connection between the middle swash plate body 20 and the pump end connecting rod plungers 11 and the motor end connecting rod plungers 27 on both sides, the first hinge member includes a pump end connecting rod 15, and a pump end connecting rod plunger ball socket 14 is disposed at one end of the pump end connecting rod plunger 11 near the middle swash plate body 20; the second hinge member includes a motor end link 24, a motor end link plunger ball socket 25 being provided at one end of the motor end link plunger 27 adjacent the intermediate swash plate body 20; the two sides of the middle swash plate base body 20 are respectively provided with a pump end middle swash plate ball socket 18 and a motor end middle swash plate ball socket 21, the pump end connecting rod 15 is respectively matched with the pump end connecting rod plunger ball socket 14 and the pump end middle swash plate ball socket 18 through the ball heads at the two ends of the pump end connecting rod, and the motor end connecting rod 24 is respectively matched with the motor end connecting rod plunger ball socket 25 and the motor end middle swash plate ball socket 21 through the ball heads at the two ends of the motor end connecting rod.
Further, in order to facilitate the realization of the flow distribution of the pump end plunger mechanism on the pump end cylinder body 10, the flow distribution mechanism arranged at the pump end cover 3 comprises a pump end flow distribution plate 4 and a pump end floating liner plate 6 which are sleeved on the main shaft 1 in a sliding way, the pump end flow distribution plate 4 is detachably connected with the pump end cover 3, the pump end floating liner plate 6 is in sliding fit with the pump end flow distribution plate 4, and the pump end floating liner plate 6 is in limit fit with the pump end cylinder body 10; two circular arc-shaped distributing grooves are formed in one side, close to the pump end floating liner plate 6, of the pump end distributing plate 4, the two circular arc-shaped distributing grooves are respectively communicated with an inlet and an outlet on the pump end cover 3, the circular arc radiuses corresponding to the two circular arc-shaped distributing grooves are the same, a plurality of connecting holes are formed in the pump end floating liner plate 6 along the circumferential direction, and a plurality of pump end plunger mechanisms are respectively communicated with the two circular arc-shaped distributing grooves through the plurality of connecting holes; the main shaft 1 is sleeved with a pump end pre-tightening spring 8, and two ends of the pump end pre-tightening spring 8 are respectively abutted with a pump end cylinder body 10 and a pump end floating lining plate 6.
Further, in order to ensure the tightness of the connection between the pump end cover 3 and the main shaft 1, a groove is formed in the inner side of the pump end cover 3, a mechanical seal 2 is arranged in the groove, the mechanical seal 2 is sleeved on the main shaft 1, and two ends of the mechanical seal 2 are respectively abutted to the pump end cover 3 and the pump end valve plate 4.
Further, in order to facilitate the realization of the flow distribution of the motor plunger mechanism on the motor cylinder 29, the flow distribution mechanism arranged at the motor end cover 36 comprises a motor end floating liner plate 33 and a motor end flow distribution plate 34, the motor end flow distribution plate 34 is detachably connected with the motor end cover 36, one end of the main shaft 1 is in clearance fit with the motor end flow distribution plate 34, the motor end floating liner plate 33 is slidably sleeved on the main shaft 1, the motor end floating liner plate 33 is in sliding fit with the motor end flow distribution plate 34, and the motor end floating liner plate 33 is in limit fit with the motor cylinder 29; two circular arc-shaped distributing grooves are formed in one side, close to the motor end floating liner plate 33, of the motor end distributing plate 34, the two circular arc-shaped distributing grooves are respectively communicated with an inlet and an outlet on the motor end cover 36, the circular arc radiuses corresponding to the two circular arc-shaped distributing grooves are the same, a plurality of connecting holes are formed in the motor end floating liner plate 33 along the circumferential direction, and a plurality of motor plunger mechanisms are respectively communicated with the two circular arc-shaped distributing grooves through the plurality of connecting holes; the spindle 1 is sleeved with a motor end pre-tightening spring 31, and two ends of the motor end pre-tightening spring 31 are respectively abutted against the motor cylinder 29 and the motor end floating lining plate 33.
Further, in order to avoid the problem that the synchronizing pin is driven to rotate by the synchronizing pin to cause the synchronizing pin to bear a large load and lose efficacy, pump end flat keys 13 and motor end flat keys 28 are respectively arranged on two sides of the middle swash plate base body 20, the pump end flat keys 13 and the motor end flat keys 28 are fixedly arranged on the main shaft 1, the pump end cylinder body 10 is in limit connection with the main shaft 1 through the pump end flat keys 13, and the motor cylinder body 29 is in limit connection with the main shaft 1 through the motor end flat keys 28.
Further, in order to ensure that the middle swash plate substrate 20 can bear the overturning moment generated in operation, the inner wall of the pump end housing 5 is provided with a pump end cylinder outer large bearing 12 in an interference manner, and the pump end cylinder body 10 is in clearance fit with the pump end cylinder outer large bearing 12; the motor end cylinder outer large bearing 26 is arranged on the inner wall of the motor shell 35 in an interference manner, and the motor cylinder body 29 is in clearance fit with the motor end cylinder outer large bearing 26; the pump end cylinder outer large bearing 12 and the motor end cylinder outer large bearing 26 are made of PEEK; a chute is arranged between the pump end shell 5 and the motor shell 35, an outer ring of a large middle swash plate bearing 19 is installed in the chute in an interference manner, the large middle swash plate bearing 19 is a double-row tapered roller bearing, the large middle swash plate bearing 19 is made of engineering ceramics or seawater corrosion resistant hard alloy, and an inner ring of the large middle swash plate bearing 19 is installed on the middle swash plate base 20 in an interference manner; the two sides of the middle swash plate base body 20 are respectively and detachably provided with a middle swash plate pump end ball socket gland 16 and a middle swash plate motor end ball socket gland 23, and the inner ring of the middle swash plate large bearing 19 is arranged between the middle swash plate pump end ball socket gland 16 and the middle swash plate base body 20 in a limiting way; the pump end middle swash plate ball socket 18 is mounted on the middle swash plate base 20 in a limiting mode through the middle swash plate pump end ball socket gland 16, and the motor end middle swash plate ball socket 21 is mounted on the middle swash plate base 20 in a limiting mode through the middle swash plate motor end ball socket gland 23.
Further, the number of the synchronizing pins 17 is four, four pin grooves are formed in the middle swash plate base body 20 at equal intervals along the circumferential direction, the four synchronizing pins 17 are respectively arranged in the four pin grooves, and the axes of the middle swash plate base body 20, the synchronizing pins 17 and the main shaft 1 intersect at one point so as to realize synchronous rotation of the main shaft 1 and the middle swash plate base body 20 around different axes. The synchronizing pin 17 is made of WC and integrally sintered, and the intermediate swash plate base 20 is made of 17-4PH.
Further, in order to avoid the situation that the whole device chamber is full of liquid due to internal leakage, so that the running pressure in the chamber is increased to cause "holding pressure" and further increase the running resistance of each rotating member, through holes are formed in the main shaft 1, the pump end cylinder body 10 and the motor cylinder body 29 to communicate with liquids in different chambers, and the liquid is discharged through the shell leakage opening 22 formed in the bottom of the motor shell.
The integrated skid-free hydraulic pump-motor energy recovery unit provided by the invention has the advantages that the low-pressure seawater inlet A on the pump end cover 3 and the low-pressure strong brine outlet C of the motor end cover 36 are positioned at the same side, and the high-pressure seawater outlet B on the pump end cover 3 and the high-pressure strong brine inlet D of the motor end cover 36 are positioned at the same side.
The working principle of the integrated skid-free hydraulic pump-motor energy recovery unit provided by the invention is as follows:
the main shaft 1 drives the middle swash plate and the pump end cylinder body to work under the drive of the motor, the middle swash plate drives the pump end connecting rod plunger 11 to move, the pump end connecting rod plunger 11 reciprocates due to the existence of the inclination angle of the middle swash plate matrix 20, and low-pressure seawater is pressurized after being sucked from the port A and then discharged to the front of the reverse osmosis membrane through the port B.
The high-pressure strong brine which does not pass through the reverse osmosis membrane enters a plunger cavity on the motor cylinder 29 from the port D and the motor end valve plate 34 to push the motor end connecting rod plunger 27 to extend outwards; meanwhile, the high-pressure strong brine acts on the middle swash plate through the motor end connecting rod plunger 27, the component force of the thrust vertical to the middle swash plate is counteracted by the reactive force, and the component force of the thrust parallel to the middle swash plate base body 20 is transmitted to the main shaft 1 through the middle swash plate base body 20 and the synchronizing pin 17 so as to generate the same torque and rotation speed as the motor steering, and further compensate the input power of the motor, thereby reducing the energy consumption of the reverse osmosis sea water desalination system. And the motor end connecting rod plunger 27 at the outlet side of the low-pressure strong brine is forced to retract to discharge the low-pressure strong brine in the plunger cavity from the port C.
The working principle of the invention applied to the double-row plunger high-flow hydraulic pump is as follows:
the low-pressure liquid enters the pump end valve plate 4 and the motor end valve plate 34 from the port A and the port D of the pump end cover 3 and the motor end cover 36 respectively, the main shaft 1 drives the middle swash plate base body 20, the pump end cylinder body 10 and the motor cylinder body 29 to rotate under the drive of the motor, and the pump end connecting rod plunger 11 and the motor end connecting rod plunger 27 simultaneously perform reciprocating liquid sucking and discharging movement due to the existence of the middle swash plate base body 20, continuously suck the low-pressure liquid into a plunger cavity and jointly flow and discharge the low-pressure liquid through the high-pressure waist-shaped grooves of the valve plates at two sides, the port B of the pump end cover 3 and the port C of the motor end cover 36. Although the high and low pressure areas are staggered, so that the middle swash plate base 20 always bears a larger overturning moment in the operation of the double-row plunger large-displacement hydraulic pump, the scheme of the double-row tapered roller bearing is adopted by the middle swash plate large bearing 19, and the scheme is enough to bear the overturning moment generated in the operation. And through the staggered arrangement of the plunger cavities, the double-row plunger high-flow hydraulic pump can greatly reduce the flow pulsation of the pump. In addition, the sliding shoe pair is eliminated, so that the double-row plunger high-flow hydraulic pump has better starting characteristics and higher volumetric efficiency and mechanical efficiency.
The working principle of the invention applied to the double-row plunger high-flow hydraulic motor is as follows:
the high-pressure liquid enters the pump end valve plate 4 and the motor end valve plate 34 from the port B of the pump end cover 3 and the port C of the motor end cover 36 respectively, the high-pressure water drives the pump end connecting rod plunger 11 and the motor end connecting rod plunger 27 to extend outwards, the high-pressure liquid acts on two thrust forces of the middle swash plate through the pump end connecting rod plunger 11-the pump end connecting rod 15 and the motor end connecting rod plunger 27-the motor end connecting rod 24, component forces of the two thrust forces in the direction parallel to the middle swash plate base 20 form a moment, the moment drives the middle swash plate base 20 to rotate, and then drives the main shaft 1 to rotate through the transmission of the synchronizing pin 17, so that the conversion from hydraulic energy to mechanical energy is realized. Similarly, the large bearing 19 of the middle swash plate adopts a double-row tapered roller scheme, can completely bear overturning moment acting on the middle swash plate matrix 20 generated in the running process, and can greatly reduce flow pulsation of the motor through staggered arrangement of a plurality of plunger cavities. In addition, the sliding shoe pair is eliminated, so that the double-row plunger high-flow hydraulic motor has better starting characteristics and higher volumetric efficiency and mechanical efficiency.
The foregoing is merely a preferred embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions easily conceivable by those skilled in the art within the technical scope of the present application should be covered in the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (5)
1. The integrated skid-free hydraulic pump-motor energy recovery unit is characterized by comprising a shell and a main shaft (1) which are coaxially arranged, wherein an intermediate swash plate base body (20) is sleeved on the main shaft (1), a plurality of synchronizing pins (17) are circumferentially and equidistantly arranged on the main shaft (1), the intermediate swash plate base body (20) is in limit fit with the main shaft (1) through the synchronizing pins (17), two sides of the intermediate swash plate base body (20) are respectively provided with a pump end cylinder body (10) and a motor cylinder body (29), the pump end cylinder bodies (10) and the motor cylinder bodies (29) are in limit transmission fit with the main shaft (1), and the intermediate swash plate base body (20), the pump end cylinder bodies (10) and the motor cylinder bodies (29) are rotationally connected with the inside of the shell;
a plurality of pump end plunger mechanisms are arranged in the pump end cylinder body (10) at equal intervals along the circumferential direction of the main shaft (1), a plurality of motor plunger mechanisms are arranged in the motor cylinder body (29) at equal intervals along the circumferential direction of the main shaft (1), the pump end plunger mechanisms and the motor plunger mechanisms are hinged with the middle swash plate substrate (20), and the pump end plunger mechanisms and the motor plunger mechanisms are arranged in a one-to-one correspondence;
the pump end cylinder body (10) is far away from one end of the middle swash plate base body (20), the motor cylinder body (29) is far away from one end of the middle swash plate base body (20) and is provided with a flow distribution mechanism, the two ends of the shell are provided with an inlet and an outlet, and the pump end plunger mechanism and the motor plunger mechanism are respectively communicated with the inlet and the outlet at the two ends of the shell through the two flow distribution mechanisms;
the casing comprises a pump end cover (3) rotationally sleeved on the main shaft (1), a pump end casing (5) is fixedly connected to the pump end cover (3), and a pump end cylinder body (10) is rotationally connected in the pump end casing (5); one end of the main shaft (1) is provided with a motor end cover (36), the main shaft (1) is in clearance fit with the motor end cover (36), a motor shell (35) is fixedly connected to the motor end cover (36), and the motor cylinder body (29) is rotatably connected in the motor shell (35); the pump end shell (5) is detachably connected with the motor shell (35) through a flange, and the middle swash plate base body (20) is in limit sliding fit with the inner wall of the pump end shell (5) and the inner wall of the motor shell (35); the pump end cover (3) and the motor end cover (36) are respectively provided with the inlet and the outlet;
the pump end plunger mechanism comprises a pump end plunger bushing (9) arranged in the pump end cylinder body (10), a pump end connecting rod plunger (11) is slidably arranged in the pump end plunger bushing (9), a first hinge piece is arranged at one end, close to the middle swash plate base body (20), of the pump end connecting rod plunger (11), and the pump end connecting rod plunger (11) is hinged with the middle swash plate base body (20) through the first hinge piece; a pump end communication sleeve (7) is arranged at one end, far away from the middle swash plate substrate (20), of the pump end plunger bushing (9), and the pump end communication sleeve (7) is communicated with an inlet and an outlet on the pump end cover (3) through the flow distribution mechanism;
the motor plunger mechanism comprises a motor end plunger bushing (30) arranged in the motor cylinder body (29), a motor end connecting rod plunger (27) is slidably arranged in the motor end plunger bushing (30), a second hinge piece is arranged at one end, close to the middle swash plate base body (20), of the motor end connecting rod plunger (27), and the motor end connecting rod plunger (27) is hinged with the middle swash plate base body (20) through the second hinge piece; a motor end plunger communication sleeve (32) is arranged at one end, far away from the middle swash plate substrate (20), of the motor end plunger bushing (30), and the motor end plunger communication sleeve (32) is communicated with an inlet and an outlet on the motor end cover (36) through the flow distribution mechanism;
the first hinge piece comprises a pump end connecting rod (15), and one end, close to the middle swash plate base body (20), of the pump end connecting rod plunger (11) is provided with a pump end connecting rod plunger ball socket (14); the second hinge piece comprises a motor end connecting rod (24), and one end, close to the middle swash plate base body (20), of the motor end connecting rod plunger (27) is provided with a motor end connecting rod plunger ball socket (25); pump end middle swash plate ball sockets (18) and motor end middle swash plate ball sockets (21) are respectively arranged on two sides of the middle swash plate base body (20), the pump end connecting rod (15) is respectively matched with the pump end connecting rod plunger ball sockets (14) and the pump end middle swash plate ball sockets (18) through ball heads on two ends of the pump end connecting rod, and the motor end connecting rod (24) is respectively matched with the motor end connecting rod plunger ball sockets (25) and the motor end middle swash plate ball sockets (21) through ball heads on two ends of the motor end connecting rod;
the inner wall of the pump end shell (5) is provided with a large pump end cylinder outer bearing (12) in an interference manner, and the pump end cylinder body (10) is in clearance fit with the large pump end cylinder outer bearing (12); the inner wall of the motor shell (35) is provided with a large motor end cylinder outer bearing (26) in an interference manner, and the motor cylinder body (29) is in clearance fit with the large motor end cylinder outer bearing (26); a chute is arranged between the pump end shell (5) and the motor shell (35), an outer ring of a large middle swash plate bearing (19) is installed in the chute in an interference manner, and an inner ring of the large middle swash plate bearing (19) is installed on the middle swash plate base body (20) in an interference manner; two sides of the middle swash plate base body (20) are respectively and detachably provided with a middle swash plate pump end ball socket gland (16) and a middle swash plate motor end ball socket gland (23), and an inner ring of the middle swash plate large bearing (19) is arranged between the middle swash plate pump end ball socket gland (16) and the middle swash plate base body (20) in a limiting manner; the pump end middle swash plate ball socket (18) is mounted on the middle swash plate base body (20) in a limiting mode through the middle swash plate pump end ball socket gland (16), and the motor end middle swash plate ball socket (21) is mounted on the middle swash plate base body (20) in a limiting mode through the middle swash plate motor end ball socket gland (23).
2. The integrated skid-free hydraulic pump-motor energy recovery unit according to claim 1, characterized in that the flow distribution mechanism arranged at the pump end cover (3) comprises a pump end flow distribution plate (4) and a pump end floating liner plate (6) which are sleeved on the main shaft (1) in a sliding manner, the pump end flow distribution plate (4) is detachably connected with the pump end cover (3), the pump end floating liner plate (6) is in sliding fit with the pump end flow distribution plate (4), and the pump end floating liner plate (6) is in limit fit with the pump end cylinder body (10); two circular arc-shaped distributing grooves are formed in one side, close to the pump end floating lining plate (6), of the pump end distributing plate (4), the two circular arc-shaped distributing grooves are respectively communicated with an inlet and an outlet on the pump end cover (3), the circular arc radiuses corresponding to the two circular arc-shaped distributing grooves are the same, a plurality of connecting holes are formed in the pump end floating lining plate (6) along the circumferential direction, and a plurality of pump end plunger mechanisms are respectively communicated with the two circular arc-shaped distributing grooves through the plurality of connecting holes; the pump end pre-tightening spring (8) is sleeved on the main shaft (1), and two ends of the pump end pre-tightening spring (8) are respectively abutted to the pump end cylinder body (10) and the pump end floating lining plate (6).
3. The integrated skid-free hydraulic pump-motor energy recovery unit according to claim 1, characterized in that the flow distribution mechanism arranged at the motor end cover (36) comprises a motor end floating liner plate (33) and a motor end flow distribution plate (34), the motor end flow distribution plate (34) is detachably connected with the motor end cover (36), one end of the main shaft (1) is in clearance fit with the motor end flow distribution plate (34), the motor end floating liner plate (33) is slidably sleeved on the main shaft (1), the motor end floating liner plate (33) is in sliding fit with the motor end flow distribution plate (34), and the motor end floating liner plate (33) is in limit fit with the motor cylinder (29); two circular arc-shaped distributing grooves are formed in one side, close to the motor end floating liner plate (33), of the motor end distributing plate (34), the two circular arc-shaped distributing grooves are respectively communicated with an inlet and an outlet on the motor end cover (36), the circular arc radiuses corresponding to the two circular arc-shaped distributing grooves are the same, a plurality of connecting holes are formed in the motor end floating liner plate (33) along the circumferential direction, and a plurality of motor plunger mechanisms are respectively communicated with the two circular arc-shaped distributing grooves through the plurality of connecting holes; the motor end pre-tightening spring (31) is sleeved on the main shaft (1), and two ends of the motor end pre-tightening spring (31) are respectively abutted to the motor cylinder body (29) and the motor end floating lining plate (33).
4. The integrated skid-free hydraulic pump-motor energy recovery unit according to claim 1, characterized in that pump end flat keys (13) and motor end flat keys (28) are respectively arranged on two sides of the middle swash plate base body (20), the pump end flat keys (13) and the motor end flat keys (28) are fixedly arranged on the main shaft (1), the pump end cylinder body (10) is in limit connection with the main shaft (1) through the pump end flat keys (13), and the motor cylinder body (29) is in limit connection with the main shaft (1) through the motor end flat keys (28).
5. The integrated skid-free hydraulic pump-motor energy recovery unit according to claim 1, wherein the number of the synchronizing pins (17) is four, four pin grooves are formed in the middle swash plate base body (20) at equal intervals along the circumferential direction, the four synchronizing pins (17) are respectively arranged in the four pin grooves, and axes of the middle swash plate base body (20), the synchronizing pins (17) and the main shaft (1) intersect at one point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310352656.9A CN116201709B (en) | 2023-04-04 | 2023-04-04 | Integrated hydraulic pump-motor energy recovery unit without sliding shoes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310352656.9A CN116201709B (en) | 2023-04-04 | 2023-04-04 | Integrated hydraulic pump-motor energy recovery unit without sliding shoes |
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| CN116201709A CN116201709A (en) | 2023-06-02 |
| CN116201709B true CN116201709B (en) | 2024-02-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202310352656.9A Active CN116201709B (en) | 2023-04-04 | 2023-04-04 | Integrated hydraulic pump-motor energy recovery unit without sliding shoes |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4297086A (en) * | 1979-02-16 | 1981-10-27 | The Garrett Corporation | Fluid motor-pump unit |
| JPH11218073A (en) * | 1998-02-02 | 1999-08-10 | Komatsu Ltd | Pump motor device |
| CN106150955A (en) * | 2015-04-19 | 2016-11-23 | 王新之 | Hydraulic axial plunger pump (motor) drive mechanism |
| CN110985325A (en) * | 2019-12-20 | 2020-04-10 | 潍柴动力股份有限公司 | Axial plunger pump motor and engineering machinery |
| CN111022281A (en) * | 2019-12-26 | 2020-04-17 | 北京工业大学 | Sea water desalination high-pressure pump with few friction pairs and energy recovery integrated unit |
-
2023
- 2023-04-04 CN CN202310352656.9A patent/CN116201709B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4297086A (en) * | 1979-02-16 | 1981-10-27 | The Garrett Corporation | Fluid motor-pump unit |
| JPH11218073A (en) * | 1998-02-02 | 1999-08-10 | Komatsu Ltd | Pump motor device |
| CN106150955A (en) * | 2015-04-19 | 2016-11-23 | 王新之 | Hydraulic axial plunger pump (motor) drive mechanism |
| CN110985325A (en) * | 2019-12-20 | 2020-04-10 | 潍柴动力股份有限公司 | Axial plunger pump motor and engineering machinery |
| CN111022281A (en) * | 2019-12-26 | 2020-04-17 | 北京工业大学 | Sea water desalination high-pressure pump with few friction pairs and energy recovery integrated unit |
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| CN116201709A (en) | 2023-06-02 |
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