CN112922802A - Ultrahigh-pressure fluid self-lubricating valve group type high-temperature high-efficiency corrosion-resistant water hydraulic plunger pump - Google Patents
Ultrahigh-pressure fluid self-lubricating valve group type high-temperature high-efficiency corrosion-resistant water hydraulic plunger pump Download PDFInfo
- Publication number
- CN112922802A CN112922802A CN202110243142.0A CN202110243142A CN112922802A CN 112922802 A CN112922802 A CN 112922802A CN 202110243142 A CN202110243142 A CN 202110243142A CN 112922802 A CN112922802 A CN 112922802A
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- valve
- pump
- assembly
- pressure fluid
- ultrahigh
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 46
- 238000005260 corrosion Methods 0.000 title claims abstract description 20
- 230000007797 corrosion Effects 0.000 title claims abstract description 20
- 239000012530 fluid Substances 0.000 title claims abstract description 19
- 239000000463 material Substances 0.000 claims abstract description 27
- 238000000034 method Methods 0.000 claims description 14
- 239000002131 composite material Substances 0.000 claims description 13
- 230000008569 process Effects 0.000 claims description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 description 7
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 7
- 239000010687 lubricating oil Substances 0.000 description 5
- 239000004696 Poly ether ether ketone Substances 0.000 description 4
- 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 4
- 229920002530 polyetherether ketone Polymers 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 4
- 230000004044 response Effects 0.000 description 4
- 230000035945 sensitivity Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 229920006605 PEEK+PTFE Polymers 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
Images
Classifications
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- 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
- F04B1/14—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 stationary cylinders
- F04B1/141—Details or component parts
-
- 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
- F04B1/14—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 stationary cylinders
- F04B1/16—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 stationary cylinders having two or more sets of cylinders or pistons
-
- 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
- F04B1/14—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 stationary cylinders
- F04B1/18—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 stationary cylinders having self-acting distribution members, i.e. actuated by working fluid
- F04B1/182—Check valves
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Details Of Reciprocating Pumps (AREA)
Abstract
The invention discloses an ultrahigh pressure fluid self-lubricating valve group type high-temperature high-efficiency corrosion-resistant water hydraulic plunger pump, which relates to the field of pumps and comprises a pump shell, wherein a pump shaft is arranged at the central position of the pump shell, a swash plate is arranged in the pump shell, a piston shoe and a return disc are arranged on the swash plate, one end of the piston shoe is connected with a plunger shoe sleeve, one end of the plunger shoe sleeve is connected with a valve plate assembly, one side of the valve plate assembly is provided with a valve flow distribution assembly, the axial direction of the valve flow distribution assembly is consistent with the axial direction of the pump shaft, the valve plate assembly and the valve flow distribution assembly are matched in the invention, so that the device is suitable for a high-temperature environment, can emit very high pressure, has large flow and reduced volume, adopts self-lubricating materials for realizing zero leakage and zero pollution, adopts materials with light weight and high strength for a valve core of, The intensity is high, the flow distribution under high-speed rotation can be realized, and the working efficiency is greatly improved.
Description
Technical Field
The invention relates to the field of pumps, in particular to an ultrahigh-pressure fluid self-lubricating valve group type high-temperature high-efficiency corrosion-resistant water hydraulic plunger pump.
Background
At present, hydraulic plunger pumps on the market are mainly in a flow distribution plate flow distribution mode, and a water hydraulic pump adopting valve flow distribution drives a swash plate to be lubricated by oil. The main problems that exist are: the flow distribution form of the flow distribution plate is determined, and the flow distribution of the plunger pump is determinedSmall flow, low pressure, maximum 43m3The pressure is as low as 160Bar at most, and the sensitivity to the water temperature is high, and the maximum water temperature can not exceed 50 degrees. The oil lubricating valve has smaller flow distribution flow of maximum 20m3The maximum pressure is 160bar, and the problem of lubricating oil leakage, medium pollution and high noise exist at the same time.
Disclosure of Invention
The invention solves the technical problem of providing the ultrahigh pressure fluid self-lubricating valve group type high-temperature high-efficiency corrosion-resistant water hydraulic plunger pump which does not need lubricating oil, can carry out self-lubrication, realizes zero pollution, and can be suitable for high temperature, light weight, small inertia, quick response, high strength, corrosion resistance and small volume.
The technical scheme adopted by the invention for solving the technical problems is as follows: ultrahigh pressure fluid is from lubricated valve train formula high temperature high efficiency corrosion-resistant water hydraulic pressure plunger pump, including the pump housing, the central point of pump housing puts the department and is provided with the pump shaft, the surface that lies in the pump shaft in the pump housing is provided with the sloping cam plate, be provided with piston shoe subassembly, return stroke dish and ball subassembly on the sloping cam plate, the one end that the sloping cam plate was kept away from to the piston shoe is connected with the plunger subassembly, the one end that the piston shoe was kept away from to the plunger subassembly is connected with the valve plate subassembly, one side that the plunger subassembly was kept away from to the valve plate subassembly is provided with the valve distribution subassembly, the axial of valve distribution subassembly is unanimous with the axial of pump shaft, the valve plate subassembly cooperates with the valve distribution subassembly, and the cavitation erosion sensitivity is low for this device can be applicable to high temperature environment, makes this device can beat very high pressure.
Further, the method comprises the following steps: the valve distribution assembly comprises a water inlet valve assembly and a water outlet valve assembly.
Further, the method comprises the following steps: the water inlet valve assembly and the water outlet valve assembly adopt the same fittings and can be interchanged.
Further, the method comprises the following steps: the inlet valve assembly and the outlet valve assembly each include a plunger check valve.
Further, the method comprises the following steps: the valve core of the plunger type check valve is made of materials with light weight and high strength, so that the device has small inertia, quick response and high strength, can realize flow distribution under high-speed rotation, and greatly improves the working efficiency.
Further, the method comprises the following steps: and each plunger type check valve is provided with a micro spring, and the elasticity of the micro spring is matched with the rotation speed.
Further, the method comprises the following steps: the valve plate subassembly is close to one of pump shaft and stretches into one of pump housing and serves and be provided with the spring holder, the surface that just is located the pump shaft between pump shaft and the spring holder is provided with the spring, the spring is used for producing elasticity.
Further, the method comprises the following steps: the outer surface of one end, close to the spring, of the pump shaft is sleeved with the composite material bearing, the composite material bearing is wear-resistant, and the service life of the device is prolonged.
Further, the method comprises the following steps: and one end of the outer surface of the pump shaft, which is positioned on the pump shell, is sleeved with a mounting flange.
Further, the method comprises the following steps: the sliding shoe assembly, the return disc, the composite material bearing, the valve flow distribution assembly, the water inlet valve assembly and the water outlet valve assembly are all made of self-lubricating materials, lubricating oil is not needed, and zero leakage and zero pollution can be achieved.
Further, the method comprises the following steps: the surfaces of the swash plate and the plunger assembly are subjected to DLC treatment by adopting a PVD process.
Further, the method comprises the following steps: the composite roller bearing is arranged on the outer surface, located on the pump shaft, of the mounting flange and comprises an outer ring, an inner ring, a ball arranged between the inner ring and the outer ring and a shaft mounting inner ring arranged in the inner ring, friction between the pump shaft and the mounting flange is reduced by the composite roller bearing, the composite roller bearing is wear-resistant, and the service life of the pump shaft is prolonged.
The invention has the beneficial effects that: the valve plate assembly is matched with the valve flow distribution assembly, cavitation sensitivity is low, the device can be suitable for a high-temperature environment, high pressure can be generated by the device, high rotating speed can be achieved, flow is large, the size of the device is reduced, the sliding shoe and return disc flow distribution assembly, the water inlet valve assembly and the water outlet valve assembly are made of self-lubricating materials, lubricating oil is not needed, zero leakage and zero pollution can be achieved, the valve core of the plunger type check valve is made of materials with light weight and high strength, the inertia of the device is small, response is fast, the strength is high, flow distribution under high-speed rotation can be achieved, and working efficiency is greatly improved.
Drawings
FIG. 1 is a schematic view of the overall structure of a super-high pressure fluid self-lubricating valve group type high-temperature high-efficiency corrosion-resistant water hydraulic plunger pump;
FIG. 2 is a schematic structural view of the plunger assembly;
FIG. 3 is a schematic structural view of the water outlet valve assembly;
FIG. 4 is a schematic view of a roller bearing;
labeled as: 1. a pump shaft; 2. installing a flange; 3. a swash plate; 4. a plunger assembly; 6. a valve plate assembly; 8. a valve distribution assembly; 10. a water inlet valve assembly; 11. a water outlet valve assembly; 13. a composite bearing; 14. a pump housing; 16. a return disk; 17. a composite material roller bearing; 171. a ball; 172. an outer ring; 173. an inner ring; 174. the shaft mounts the inner race.
Detailed Description
The invention is further described with reference to the following figures and detailed description.
The ultrahigh pressure fluid self-lubricating valve group type high-temperature high-efficiency corrosion-resistant water hydraulic plunger pump as shown in fig. 1 comprises a pump shell 14, a pump shaft 1 is arranged at the center of the pump shell 14, a swash plate 3 is arranged on the outer surface of the pump shaft 1 in the pump shell 14, a slipper assembly, a return disc 16 and a retaining ball assembly are arranged on the swash plate 3, one end, away from the swash plate 3, of the slipper is connected with a plunger assembly 4, one end, away from the slipper, of the plunger assembly 4 is connected with a valve plate assembly 6, one side, away from the plunger assembly 4, of the valve plate assembly 6 is provided with a valve distributing assembly 8, the axial direction of the valve distributing assembly 8 is consistent with the axial direction of the pump shaft 1, the valve plate assembly 6 is matched with the valve distributing assembly 8, the cavitation sensitivity is low, the device can be suitable for high-temperature environment, meanwhile, the device can emit high pressure, thereby the flow is high, and the volume of the device is reduced.
On the basis of the above, the valve distribution assembly 8 comprises an inlet valve assembly 10 and an outlet valve assembly 11.
On the basis, the water inlet valve assembly 10 and the water outlet valve assembly 11 adopt the same fittings, so that the interchange can be achieved, and the cost is reduced.
On the basis of the above, the inlet valve assembly 10 and the outlet valve assembly 11 both comprise plunger type check valves.
On the basis, the valve core of the plunger type check valve is made of materials with light weight and high strength, so that the device has the advantages of small inertia, quick response and high strength, can realize flow distribution under high-speed rotation, and greatly improves the working efficiency.
On the basis, each plunger type check valve is provided with a micro spring, and the elasticity of the micro spring is matched with the rotation speed.
On the basis, valve plate assembly 6 is close to one of pump shaft 1 and stretches into pump housing 14 and is served and be provided with the spring holder, the surface that just is located pump shaft 1 between pump shaft 1 and the spring holder is provided with the spring, the spring is used for producing elasticity.
On the basis, the outer surface cover that pump shaft 1 is close to the one end of spring is equipped with combined material bearing 13, combined material bearing 13 is stand wear and tear, has prolonged the life of this device, the material of combined material bearing can be ceramic or PEEK + C combined material or PAI + C material or POM + resin material, selects PEEK + C material combined material in this embodiment.
On the basis, one end of the outer surface of the pump shaft 1, which is positioned on the pump shell 14, is sleeved with a mounting flange 2.
On the basis, the water inlet valve assembly 10 and the water outlet valve assembly 11 of the sliding shoe and return disc 16 bearing 13 flow distribution assembly 8 are made of self-lubricating materials, lubricating oil is not needed, zero leakage and zero pollution can be achieved, the self-lubricating materials can be PPEK + C, PEEK + PTFE + C, PAI + C, PAI + PTFE + C, PPS + PTFE, PTFE + C, PTFE + C + CU, PTFE + CU, POM + glass fibers, POM + resin or metal surfaces are subjected to DLC treatment or metal surfaces are subjected to silicon carbide spraying treatment, and the PPEK + C self-lubricating materials are adopted in the embodiment.
On the basis, the surfaces of the swash plate 3 and the plunger assembly 4 are subjected to DLC treatment by adopting a PVD process.
On the basis, be located the outer surface of pump shaft 1 in mounting flange 2 and be provided with combined material roller bearing 17, combined material roller bearing 17 includes outer lane 172, inner circle 173, sets up ball 171 between inner circle and outer lane and sets up axle installation inner circle 174 in the inner circle, combined material roller bearing 17 makes the friction between pump shaft 1 and the mounting flange 2 reduce, and is stand wear and tear simultaneously, has prolonged the life of pump shaft 1, combined material roller bearing's material can be PEEK + C + PTFE, pottery or 2507 super duplex steel material, selects for use the ball in this embodiment to be pottery 171, and the outer lane is 2507 surface treatment 172, and the inner circle is PEEK + C + PTFE material 173. The shaft mounting inner race is 2507 surface treated 174.
On the basis, the working principle is as follows: the normal work motor drives pump shaft 1 and rotates, pump shaft 1 adopts one end fixed one end axial to move about, pump shaft 1 rotates and drives sloping cam plate 3 and rotates, sloping cam plate 3 rotates and orders about piston shoe subassembly and plunger subassembly 4 displacement from top to bottom to join in marriage through joining in marriage a class subassembly 8, water intaking valve subassembly 10 and outlet valve subassembly 11 and flow, accomplish the water absorption and the pressurized-water of pump, the plunger jar adopts interference fit with the pump shell, and accomplish plunger jar installation tolerance compensation through floating valve plate subassembly 6 and spring assembly. The high-pressure pump adopts a fixed-clearance return design.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (11)
1. Superhigh pressure fluid is from lubricated valve train formula high temperature high-efficient corrosion-resistant water hydraulic pressure plunger pump, including pump housing (14), its characterized in that: the utility model discloses a pump for the motor pump, including pump housing (14), the central point of pump housing (14) puts and locates to be provided with pump shaft (1), the surface that lies in pump shaft (1) in pump housing (14) is provided with sloping cam plate (3), be provided with piston shoe subassembly, return stroke dish (16) and keep the ball subassembly on sloping cam plate (3), the one end that piston shoe kept away from sloping cam plate (3) is connected with plunger subassembly (4), the one end that piston shoe was kept away from in plunger subassembly (4) is connected with valve plate subassembly (6), one side that plunger subassembly (4) were kept away from in valve plate subassembly (6) is provided with valve flow distribution subassembly (8), the axial of valve flow distribution subassembly (8) is unanimous with the.
2. The ultrahigh-pressure fluid self-lubricating valve group type high-temperature high-efficiency corrosion-resistant water hydraulic plunger pump as claimed in claim 1, wherein: the valve flow distribution assembly (8) comprises a water inlet valve assembly (10) and a water outlet valve assembly (11).
3. The ultrahigh-pressure fluid self-lubricating valve type high-temperature high-efficiency corrosion-resistant water hydraulic plunger pump as claimed in claim 2, wherein: the water inlet valve assembly (10) and the water outlet valve assembly (11) adopt the same fittings, and can be interchanged.
4. The ultrahigh-pressure fluid self-lubricating valve type high-temperature high-efficiency corrosion-resistant water hydraulic plunger pump as claimed in claim 2, wherein: the inlet valve assembly (10) and the outlet valve assembly (11) each comprise a plunger check valve.
5. The ultrahigh-pressure fluid self-lubricating valve group type high-temperature high-efficiency corrosion-resistant water hydraulic plunger pump as claimed in claim 4, wherein: and each plunger type check valve is provided with a micro spring.
6. The ultrahigh-pressure fluid self-lubricating valve group type high-temperature high-efficiency corrosion-resistant water hydraulic plunger pump as claimed in claim 1, wherein: the pump is characterized in that a spring seat is arranged at one end, close to the pump shaft (1), of the valve plate assembly (6) and extending into the pump shell (14), and a spring is arranged between the pump shaft (1) and the spring seat and on the outer surface of the pump shaft (1).
7. The ultrahigh-pressure fluid self-lubricating valve type high-temperature high-efficiency corrosion-resistant water hydraulic plunger pump as claimed in claim 2, wherein: the outer surface of one end, close to the spring, of the pump shaft (1) is sleeved with a composite material bearing (13).
8. The ultrahigh-pressure fluid self-lubricating valve group type high-temperature high-efficiency corrosion-resistant water hydraulic plunger pump as claimed in claim 1, wherein: a mounting flange (2) is sleeved at one end, located on the pump shell (14), of the outer surface of the pump shaft (1).
9. The ultrahigh-pressure fluid self-lubricating valve type high-temperature high-efficiency corrosion-resistant water hydraulic plunger pump as claimed in claim 7, wherein: the sliding shoe assembly, the return disc (16), the composite material bearing (13), the valve flow distribution assembly (8), the water inlet valve assembly (10) and the water outlet valve assembly (11) are all made of self-lubricating materials.
10. The ultrahigh-pressure fluid self-lubricating valve group type high-temperature high-efficiency corrosion-resistant water hydraulic plunger pump as claimed in claim 1, wherein: the surfaces of the swash plate (3) and the plunger assembly (4) are subjected to DLC treatment by adopting a PVD process.
11. The ultrahigh-pressure fluid self-lubricating valve type high-temperature high-efficiency corrosion-resistant water hydraulic plunger pump as claimed in claim 7, wherein: the composite material roller bearing is characterized in that a composite material roller bearing (17) is arranged on the outer surface of the pump shaft (1) in the mounting flange (2), and the composite material roller bearing (17) comprises an outer ring (172), an inner ring (173), a ball (171) arranged between the inner ring and the outer ring, and a shaft mounting inner ring (174) arranged in the inner ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110243142.0A CN112922802A (en) | 2021-03-05 | 2021-03-05 | Ultrahigh-pressure fluid self-lubricating valve group type high-temperature high-efficiency corrosion-resistant water hydraulic plunger pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110243142.0A CN112922802A (en) | 2021-03-05 | 2021-03-05 | Ultrahigh-pressure fluid self-lubricating valve group type high-temperature high-efficiency corrosion-resistant water hydraulic plunger pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112922802A true CN112922802A (en) | 2021-06-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110243142.0A Pending CN112922802A (en) | 2021-03-05 | 2021-03-05 | Ultrahigh-pressure fluid self-lubricating valve group type high-temperature high-efficiency corrosion-resistant water hydraulic plunger pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112922802A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1283746A (en) * | 1999-08-05 | 2001-02-14 | 株式会社丰田自动织机制作所 | Clutchless volume variable compressor |
| CN1434209A (en) * | 2003-02-21 | 2003-08-06 | 华中科技大学 | Axial plunger type water hydraulic pump |
| CN103075316A (en) * | 2012-12-24 | 2013-05-01 | 北京工业大学 | Semiaxis type pure-water hydraulic axial plunger pump supported by bearings in cylinder |
| CN105317670A (en) * | 2014-07-28 | 2016-02-10 | 中国石油天然气股份有限公司 | Magnetic suspension swash plate axial plunger pump |
| CN112032009A (en) * | 2020-09-17 | 2020-12-04 | 上海交通大学 | A valve distribution axial piston pump |
-
2021
- 2021-03-05 CN CN202110243142.0A patent/CN112922802A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1283746A (en) * | 1999-08-05 | 2001-02-14 | 株式会社丰田自动织机制作所 | Clutchless volume variable compressor |
| CN1434209A (en) * | 2003-02-21 | 2003-08-06 | 华中科技大学 | Axial plunger type water hydraulic pump |
| CN103075316A (en) * | 2012-12-24 | 2013-05-01 | 北京工业大学 | Semiaxis type pure-water hydraulic axial plunger pump supported by bearings in cylinder |
| CN105317670A (en) * | 2014-07-28 | 2016-02-10 | 中国石油天然气股份有限公司 | Magnetic suspension swash plate axial plunger pump |
| CN112032009A (en) * | 2020-09-17 | 2020-12-04 | 上海交通大学 | A valve distribution axial piston pump |
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Application publication date: 20210608 |
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