CN105526050A - Axial plunger pump or motor with fully-floating cylinder block - Google Patents

Axial plunger pump or motor with fully-floating cylinder block Download PDF

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Publication number
CN105526050A
CN105526050A CN201510898195.0A CN201510898195A CN105526050A CN 105526050 A CN105526050 A CN 105526050A CN 201510898195 A CN201510898195 A CN 201510898195A CN 105526050 A CN105526050 A CN 105526050A
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CN
China
Prior art keywords
motor
cylinder
pump
swash plate
plunger
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Granted
Application number
CN201510898195.0A
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Chinese (zh)
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CN105526050B (en
Inventor
邓海顺
黄然
王传礼
代鹏
邓月飞
许攀
黄坤
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Anhui University of Science and Technology
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Anhui University of Science and Technology
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Priority to CN201510898195.0A priority Critical patent/CN105526050B/en
Publication of CN105526050A publication Critical patent/CN105526050A/en
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/20Multi-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
    • F04B1/22Multi-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 having two or more sets of cylinders or pistons
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/20Multi-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
    • F04B1/2014Details or component parts
    • F04B1/2035Cylinder barrels
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/20Multi-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
    • F04B1/2014Details or component parts
    • F04B1/2078Swash plates

Abstract

The invention discloses an axial plunger pump or motor with a fully-floating cylinder block, and relates to the technical field of hydraulic control. The axial plunger pump or motor comprises a shell, a port plate, a transmission shaft, the cylinder block and a swash plate, wherein the swash plate is provided with a first inclined surface and a second inclined surface, and the directions of the first inclined surface and the second inclined surface are opposite; and the cylinder block is provided with an inclined inner-row plunger hole and an inclined outer-row plunger hole, and the inclination directions of the inner-row plunger hole and the outer-row plunger hole are opposite. Through double-inclination matching between the swash plate and the plungers, a displacement difference between an inner row and an outer row can be reduced, and noise can be lowered; and maintenance for a balance between an axial force and a radial force of the cylinder body under high-speed running of the plunger pump or motor is realized, and full floating of the cylinder block is realized.

Description

A kind of axial piston pump of full floating cylinder body or motor
Technical field
The present invention relates to technical field of hydraulic, be specifically related to a kind of axial piston pump or motor of full floating cylinder body.
Background technique
Axial piston pump or motor are important hydraulic power in Hydraulic Power Transmission System or executive component, and being widely used in the occasions such as engineering machinery, coal mine machinery, farm machinery, Aero-Space, is the first-selection of high pressure, large-flow hydraulic system.Along with developing rapidly of modern mechanical industry, higher requirement is proposed to the service behaviour, working life etc. of pump or motor, researches and develops high performance pump or motor has extremely important meaning.
Common axial piston pump or motor can be divided into direct shaft type (inclined disc type) and clino-axis type, be characterized in that the cylinder body that plunger rotates relatively is reciprocating, cylinder body and thrust plate relative rotary motion, realize suction oil by the kidney-shaped mouth of cylinder body and the tangent and covering of the kidney-shaped mouth of thrust plate.There is axial float in common axial piston pump or motor, ensure that cylinder body, the normal work of the rotary components such as thrust plate, but there is not radial floating, when thrust plate carries out oil suction oil extraction, always keep side high pressure, side low pressure, cause axial piston pump or motor by force unbalance, i.e. thrust plate, swash plate, force unbalance on the major parts such as cylinder body, and there is larger unbalance loading in spindle unit, this will inevitably cause the fretting wear of plunger pump or motor to aggravate, increase noise, increase leakage rate, reduce volumetric efficiency, and then its service behaviour and working life are reduced greatly.Meanwhile, common axial piston pump or motor, when rotation one week, only have single plunger to carry out suction oil, limit the increase of flow.
Balanced type high-flow axial plunger pump, by rationally arranging the true dip direction on swash plate inclined-plane, the different size of row's concentric column consent and the size of different oil drain out, realizes the lower pump key components and parts of plunger pump high speed and high pressure running as the axial hydraulic equilibrium of forces of cylinder body, thrust plate etc. and huge discharge.Dual-sided drive shafts to piston motor due to its distinctive many swash plates ramp structure, the driving moment of equidirectional all can be produced in cylinder body both sides, thus drive the dynamic load of transmission shaft band to rotate, its key components and parts is as stressed in cylinder body, thrust plate, swash plate, the equal bilateral of transmission shaft, axial float can be reached further, improve the mechanical characteristic of key components and parts, improve the working stability of axial piston motor under low speed heavy load.No matter that balanced type high-flow axial plunger pump or dual-sided drive shafts are to piston motor, although they accomplish axial float to a certain extent, but can not eliminate the difference that its live axle both sides moment exists completely, radial floating and the problem such as wearing and tearing, vibration also have to be solved.
Summary of the invention
For the deficiencies in the prior art, the present invention discloses a kind of axial piston pump or motor of full floating cylinder body, can solve the problem that wearing and tearing are large, noise is large and the life-span is short of existing plunger pump or motor existence.
For realizing above object, the present invention is achieved by the following technical programs:
The axial piston pump of full floating cylinder body or a motor, comprise housing, thrust plate, transmission shaft, cylinder body and swash plate.Described swash plate has the first inclined-plane and the second inclined-plane, and the first described inclined-plane is contrary with the second bevel direction; Described cylinder body has the interior organ timbering consent of inclination and the outer organ timbering consent of inclination, and described interior organ timbering consent is contrary with outer organ timbering consent true dip direction.
Preferably, described interior organ timbering consent slope inwardly relative to swash plate or with Boring mill line parallel; Described outer organ timbering consent tilts relative to swash plate.
Preferably, described housing comprises pump case, left pump cover, right pump cover and left end cap, and described left pump cover and right pump cover are all connected by hexagon socket cap head screw and pump case; Described left end cap is connected by screw and left pump cover.
Preferably, described transmission shaft comprises oil sealing, axle, rolling bearing, circlip for shaft, axle sleeve, compression axle sleeve and sliding bearing, and described oil sealing, rolling bearing, circlip for shaft, axle sleeve, compression axle sleeve and sliding bearing are successively set on axle vertically.
Preferably, described thrust plate is arranged between cylinder body and right pump cover, and thrust plate is connected by pin and right pump cover.
Preferably, described right pump cover is provided with O type rubber seal.
The present invention discloses a kind of axial piston pump or motor of full floating cylinder body, the diclinic that to utilize inclination angle to be opposite direction swash plate two inclined-plane and the inclination angle that arrange be rightabout two organ timbering plugs coordinates, realize cylinder body full floating, compare conventional axial plunger pump or motor, there are three advantages: one is that swash plate coordinates with the diclinic of plunger and keeps the axial force of cylinder body and radial equilibrium of forces, realizes the full floating of cylinder body; Two is reduce inside and outside row's discharge capacity difference, reduces noise and vibration; Three is that the inclination of plunger is combined the anticreep boots ability that can strengthen inside and outside row's piston shoes, the anticreep boots ability especially under plunger pump or motor run up situation with outer row pressure locking structure.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technological scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is sectional structure schematic diagram of the present invention;
Fig. 2 is the sectional structure schematic diagram of swash plate in the present invention;
Fig. 3 is the sectional structure schematic diagram of cylinder body in the present invention;
Fig. 4 is that right cylinder plug and oblique plunger effective stroke contrast schematic diagram;
Fig. 5 is that swash plate is to batter post plug assembly reaction force schematic diagram;
Fig. 6 is that swash plate is to right cylinder plug assembly reaction force schematic diagram;
Fig. 7 is the sectional structure schematic diagram of a kind of embodiment of the present invention.
1. right pump covers in figure; 2. hexagon socket cap head screw; 3.O type rubber seal; 4. pump case; 5. pressure ring; 6. outer row pressure dish; 7. left pump cover; 8. screw; 9. left end cap; 10. oil sealing; 11. axles; 12. rolling bearings; 13. circlips for shaft; 14. axle sleeves; Row's piston shoes in 15.; 16. Inner row pressure dishes; 17. swash plates; Piston shoes are arranged outside 18.; 19. compress axle sleeve; Holddown spring is arranged outside 20.; Row's holddown spring in 21.; 22. thrust plates; 23. sliding bearings; 24. Inner organ timbering plugs; 25. outer organ timbering plugs; 26. pins; 27. cylinder bodies; 1701. the first inclined-plane; 1702. the second inclined-plane; Organ timbering consent in 2701.; 2702. outer organ timbering consents; 401. swash plate; 402. cylinder body; 403. batter post plugs; 404. right cylinder plugs; 501. swash plate; 502. plunger; 503. cylinder body; 601. swash plate; 602. plunger; 603. cylinder body; 701. swash plate; 702. cylinder body; Row's right cylinder plug in 703.; 704. outer row's batter post plugs; γ. swash plate inclination angle of inclined plane; β. plunger inclination angle.
Embodiment
For making the object of the embodiment of the present invention, technological scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technological scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
As shown in Figures 1 to 6, the axial piston pump of a kind of full floating cylinder body described in the embodiment of the present invention or motor, comprise the parts such as swash plate 17, cylinder body 27, Inner organ timbering plug 24, outer organ timbering plug 25, thrust plate 22, housing, axle 11.Transmission shaft 11 and cylinder body 27 are with spline joint and drive cylinder body 27 to rotate, cylinder body 27 is uniformly distributed two rows and the cylinder holes of main-shaft axis in the different size angle of opposite direction along conical surface, plunger (Inner organ timbering plug 24, outer organ timbering plug 25) is housed to form seal operation volume in hole; When transmission shaft 11 drives cylinder body 27 clockwise to rotate, the outer organ timbering plug on Fig. 1 axis top starts oil suction, and the outer organ timbering plug of axle bottom starts oil extraction, and meanwhile, the interior organ timbering plug on axle top starts oil extraction, and the interior organ timbering plug of axle bottom starts oil suction.The suction arranged outside top in plunger cavity will make plunger move right disengaging swash plate 17 together with piston shoes, and the impacting force on outer row pressure dish 6 will make piston shoes press to swash plate 17, and the moment that suction and impacting force are formed will make piston shoes be in balance; In bottom, the suction arranged in plunger cavity will make plunger move right disengaging swash plate 17 together with piston shoes, impacting force on interior row pressure dish 16 will make piston shoes press to swash plate 17, the moment that suction and impacting force are formed will make piston shoes be in balance, ensure the normal oil suction of axial piston pump, when main shaft 11 (or cylinder body 27) circles, every organ timbering plug all completes a to-and-fro motion and suction oil process.Wherein, the impacting force on outer row pressure dish 6 is provided by outer row's holddown spring 20, and the impacting force on Inner row pressure dish 16 is provided by interior row's holddown spring 21.
Swash plate comprises two step type inclined-planes arranged in level, two inclination angle of inclined plane are that opposite direction is arranged, each inclined-plane all has the plunger be attached thereto by piston shoes, what the corresponding cylinder body of plunger be positioned on same inclined-plane matched with it is in row and the plunger hole distributed along the conical surface; Plunger true dip direction and swash plate inclination angle of inclined plane direction match, Inner organ timbering plug is contrary with outer organ timbering plug true dip direction, the suction/exhousting hole direction that the double pillar consent of thrust plate is corresponding is contrary, for thrust plate, Internal and external cycle homonymy hydraulic fluid port is fixed as suction one row, by designing and calculating, thrust plate and the stressed maintenance balance of cylinder body can be made.
Can be found by the effective travel comparison diagram of right cylinder plug 4 with batter post plug 3, under equal conditions, the diclinic that inclination angle is opposite direction swash plate two inclined-plane and the inclination angle that arrange is rightabout two organ timbering plugs coordinates makes batter post plug have the effective travel larger than the right cylinder plug of common axial piston pump or motor, then when plunger pump or motor action, diclinic pump or motor rotate a circle realize displacement value will be greater than the discharge capacity of common axial piston pump or motor.Simultaneously, the cylinder body suction sap cavity shape pore size distribution radius at Inner organ timbering plug place diminishes, the cylinder body suction sap cavity shape pore size distribution radius at outer organ timbering plug place becomes large, make the increase of Inner discharge capacity, the reduction of effluent stream amount, by rationally arranging the different true dip direction on inclined-plane of swash plate and the angle of inclination of plunger, inside and outside discharge capacity can be balanced by calculating, ensureing the main parts size radial force such as cylinder body balance, reach and reduce noise, reduce and vibrate and make the object of cylinder body full floating.Simultaneously, the inclination of Inner organ timbering plug, be conducive to strengthening Inner when running up and arrange the anticreep boots ability of piston shoes, although the inclination of outer organ timbering plug relatively increases the risk that de-boots occur outer row's piston shoes, but due to the effect that outer row pressure is tight, ensure that the anticreep boots ability of outer row's piston shoes, stop the outer generation getting rid of boots phenomenon.
Swash plate is F to the reaction force of assembly n, be decomposed into along plunger axis to component F pwith perpendicular to plunger axis to component F ftime, diclinic plunger pump or motor F nwith F pangle than the large plunger inclination angle of straight plunger pump or motor.Along plunger axis to component, wherein d is plunger diameter, and p is oil pressure, concerning each plunger, F pfor constant, for diclinic plunger pump or motor, perpendicular to plunger axis to component; For ordinary straight plunger pump or motor, perpendicular to plunger axis to component.Because function is increasing function in first quartile, thus diclinic plunger pump or motor perpendicular to plunger axis to component F fbe greater than ordinary straight plunger pump or motor.By rationally arranging the diameter of the conical surface that plunger distributes, the main parts size such as swash plate, cylinder body stress balance can be made.
Row's plunger axis and Boring mill line parallel as shown in Figure 7, outer row's plunger axis and cylinder body axis have the embodiment of inclination, and in it, organ timbering consent also slopes inwardly relative to swash plate, and outer organ timbering consent is outward-dipping relative to swash plate.Although the cylinder body suction sap cavity shape pore size distribution radius at Inner organ timbering plug place does not have significant change, but the cylinder body suction sap cavity shape pore size distribution radius at outer organ timbering plug place becomes large, its effluent stream amount is reduced, by rationally arranging the different true dip direction on inclined-plane of swash plate and the angle of inclination of plunger, inside and outside discharge capacity can be balanced by calculating, ensure the main parts size radial force such as cylinder body balance, reach and reduce noise, reduce and vibrate and make the object of cylinder body full floating.
The present invention discloses a kind of axial piston pump or motor of full floating cylinder body in sum, the diclinic that to utilize inclination angle to be opposite direction swash plate two inclined-plane and the inclination angle that arrange be rightabout two organ timbering plugs coordinates, realize cylinder body full floating, compare conventional axial plunger pump or motor, there are three advantages: one is that swash plate coordinates with the diclinic of plunger and keeps the axial force of cylinder body and radial equilibrium of forces, realizes the full floating of cylinder body; Two is reduce inside and outside row's discharge capacity difference, reduces noise and vibration; Three is that the inclination of plunger is combined the anticreep boots ability that can strengthen inside and outside row's piston shoes, the anticreep boots ability especially under plunger pump or motor run up situation with outer row pressure locking structure.
It should be noted that, in this article, the such as relational terms of first and second grades and so on is only used for an entity or operation to separate with another entity or control panel, and not necessarily requires or imply the relation that there is any this reality between these entities or operation or sequentially.And, in this article, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, article or equipment and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, article or equipment.When not more restrictions, the key element limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment comprising described key element and also there is other identical element.
Above embodiment only in order to technological scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technological scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technological scheme.

Claims (6)

1. the axial piston pump of full floating cylinder body or a motor, comprise housing, thrust plate, transmission shaft, cylinder body and swash plate, it is characterized in that: described swash plate has the first inclined-plane and the second inclined-plane, the first described inclined-plane is contrary with the second bevel direction; Described cylinder body has the interior organ timbering consent of inclination and the outer organ timbering consent of inclination, and described interior organ timbering consent is contrary with outer organ timbering consent true dip direction.
2. the axial piston pump of full floating cylinder body as claimed in claim 1 or motor, is characterized in that: described interior organ timbering consent slope inwardly relative to swash plate or with Boring mill line parallel; Described outer organ timbering consent tilts relative to swash plate.
3. the axial piston pump of full floating cylinder body as claimed in claim 1 or motor, it is characterized in that: described housing comprises pump case, left pump cover, right pump cover and left end cap, described left pump cover and right pump cover are all connected by hexagon socket cap head screw and pump case; Described left end cap is connected by screw and left pump cover.
4. the axial piston pump of full floating cylinder body as claimed in claim 1 or motor, it is characterized in that: described transmission shaft comprises oil sealing, axle, rolling bearing, circlip for shaft, axle sleeve, compression axle sleeve and sliding bearing, described oil sealing, rolling bearing, circlip for shaft, axle sleeve, compression axle sleeve and sliding bearing are successively set on axle vertically.
5. the axial piston pump of the full floating cylinder body as described in claim 1 or 3 or motor, is characterized in that: described thrust plate is arranged between cylinder body and right pump cover, and thrust plate is connected by pin and right pump cover.
6. the axial piston pump of full floating cylinder body as claimed in claim 3 or motor, is characterized in that: described right pump cover is provided with O type rubber seal.
CN201510898195.0A 2015-12-04 2015-12-04 A kind of axial plunger pump or motor of full floating cylinder body Active CN105526050B (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106194624A (en) * 2016-09-21 2016-12-07 安徽理工大学 A kind of balanced type two inclined-plane axial plunger pump
CN106321393A (en) * 2016-08-31 2017-01-11 上海交通大学 Displacement automatic-compensation variable-rotational-speed adjustment swash plate axial plunger pump
CN106438256A (en) * 2016-11-26 2017-02-22 浙江大学 Static-pressure supporting structure for compensating pressing force of three-plunger-hole cylinder block
CN110748468A (en) * 2019-11-28 2020-02-04 厦门大学 High-speed high-pressure axial plunger pump

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US20050123412A1 (en) * 2003-09-29 2005-06-09 Takeo Shimizu Swash plate type hydraulic pump or motor
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CN103184990A (en) * 2013-03-14 2013-07-03 北京工业大学 Oblique plunger type pure water hydraulic swash plate pump
CN103939312A (en) * 2014-04-25 2014-07-23 福州大学 Balanced type double-row large-displacement axial plunger pump
CN104863813A (en) * 2015-06-01 2015-08-26 安徽理工大学 Swash plate type axial plunger pump or motor pressing device
CN104948408A (en) * 2015-07-01 2015-09-30 张意 Variable axial plunger pump
CN205243748U (en) * 2015-12-04 2016-05-18 安徽理工大学 Axial plunger pump of cylinder body entirely floats

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050123412A1 (en) * 2003-09-29 2005-06-09 Takeo Shimizu Swash plate type hydraulic pump or motor
CN101487458A (en) * 2008-07-14 2009-07-22 张全根 Axial variable displacement plunger pump of swash plate
CN102619715A (en) * 2012-04-26 2012-08-01 安徽理工大学 Balanced high-flow axial plunger pump
CN103184990A (en) * 2013-03-14 2013-07-03 北京工业大学 Oblique plunger type pure water hydraulic swash plate pump
CN103939312A (en) * 2014-04-25 2014-07-23 福州大学 Balanced type double-row large-displacement axial plunger pump
CN104863813A (en) * 2015-06-01 2015-08-26 安徽理工大学 Swash plate type axial plunger pump or motor pressing device
CN104948408A (en) * 2015-07-01 2015-09-30 张意 Variable axial plunger pump
CN205243748U (en) * 2015-12-04 2016-05-18 安徽理工大学 Axial plunger pump of cylinder body entirely floats

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106321393A (en) * 2016-08-31 2017-01-11 上海交通大学 Displacement automatic-compensation variable-rotational-speed adjustment swash plate axial plunger pump
CN106194624A (en) * 2016-09-21 2016-12-07 安徽理工大学 A kind of balanced type two inclined-plane axial plunger pump
CN106194624B (en) * 2016-09-21 2018-05-15 安徽理工大学 A kind of two inclined-plane axial plunger pump of balanced type
CN106438256A (en) * 2016-11-26 2017-02-22 浙江大学 Static-pressure supporting structure for compensating pressing force of three-plunger-hole cylinder block
CN106438256B (en) * 2016-11-26 2018-04-20 浙江大学 Compensate the hydrostatic support structure of three plunger hole cylinder body thrusts
CN110748468A (en) * 2019-11-28 2020-02-04 厦门大学 High-speed high-pressure axial plunger pump
CN110748468B (en) * 2019-11-28 2020-07-03 厦门大学 High-speed high-pressure axial plunger pump

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