CN103184990B - Oblique plunger type pure water hydraulic swash plate pump - Google Patents
Oblique plunger type pure water hydraulic swash plate pump Download PDFInfo
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- CN103184990B CN103184990B CN201310082079.2A CN201310082079A CN103184990B CN 103184990 B CN103184990 B CN 103184990B CN 201310082079 A CN201310082079 A CN 201310082079A CN 103184990 B CN103184990 B CN 103184990B
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Abstract
The invention relates to an oblique plunger type pure water hydraulic swash plate pump, which adopts a sphere flow distribution structure of a cone-shaped cylinder. A plunger and a transmission shaft form an included angle, and relative to the transmission main shaft, the plunger is arranged in a shape of cone; and centripetal force generated during operation facilitates return stroke of the plunger. The main shaft is connected with a conical cylinder via a spline, and the plunger is matched with skid shoes via a ball head. A spherical hinge and the cone-shaped cylinder are pressed by a disk spring, return stroke force during the operation of the plunger is provided and sealing of the skid shoe pair and the flow distribution pair is achieved. A flow distribution disc adopts a sphere flow distribution structure, facilitates balancing of subversion moment generated by the cone-shaped cylinder during operation, and improves the self-alignment performance of the cone-shaped cylinder and the flow distribution plate; the cone-shaped cylinder and the sphere flow distribution disc structure enable the flow distribution window pitch diameter of the flow distribution disc to be reduced, water absorption flow rate is reduced, and self-sucking performance of a pump is enhanced. The pump takes filtered fresh water or seawater as the working medium, solves the problems that the self-sucking performance of a pure water hydraulic plunger pump is poor and the return stroke is difficult, and has remarkable technical advantages.
Description
Technical field
The present invention relates to a kind of oblique plunger type pure water hydraulic swash plate pump, can be used as dynamical element and be applied in Water Hydraulics system, belong to Fluid Transmission and Control technical field.
Background technique
Pure Water Hydraulic Drive Technology is using natural fresh water or seawater proxy mineral oil as a new technology of hydraulic work system medium.In recent years, based on the pay attention to day by day of safety and sanitary, energy saving, protection of the environment and ocean development, the research of Pure Water Hydraulic Drive Technology has become a large Some Questions To Be Researched of international hydraulic pressure circle.Compared with using the hydraulic transmission of other types medium, Water Hydraulics has the following advantages:
(1) environmental friendliness, pollution-free.The water of general leakage does not need to reclaim, and can not to environment, avoids and uses oil as problem incompatible with environment etc. during medium, achieve " green " change of transmission process.
(2) good flame resistance, do not burn.Due to the physicochemical property of water, after not worrying leakage, understand the serious accidents such as initiation fire.
(3) cost low, store convenient transportation.Distribution of water resources is wide, take conveniently, so without the need to storing especially and transporting, saved spending, correspondingly improve benefit.
(4) pure water hydraulics system architecture is simple, easy to maintenance.
Water Hydraulic Pump is the core of Water Hydraulics system, and the more Water Hydraulic Pump of application has centrifugal pump, two plunger pumps and treble ram pump at present.The shortcomings such as it is low that centrifugal pump has pressure, and noise is large, can not meet the requirement of Water Hydraulics system pumping source completely; The shortcomings such as it is little that two plunger pumps and treble ram pump have flow, bulky, and vibration noise is large, can not be widely used in various Water Hydraulics system.Swash plate plunger pump and bent axis type axial piston pump have high-pressure high-flow, and volume is little, easy to maintenance, can meet the advantages such as noise and vibration requirement and enjoy countries in the world focus of attention.Developed country has developed comparatively ripe product, and has captured quite a few market.
The Danfoss series pump of Denmark, TWHC and the Fenner series pump of Britain generally adopts inclined disc type dish distributing construction, all the marketization.But this several pump requires too high (being generally≤10um) to the filter precision of working medium, contamination resistance and suction capacity poor.
China is also in the development stage in this technical field, and the model machine developed is ripe not enough, still can not commercialization.Chinese patent (CN 1554869A) discloses a kind of Water Hydraulic Axial Piston Pump or motor of fully water lubricating valve plate distribution, and this pump adopts cylinder outer bearing to support conical cylinder, and trunk piston set adopts clearance seal, and difficulty of processing is large, and contamination resistance is poor.
Chinese patent (CN 102155370A) discloses a kind of pure water hydraulic through-shaft type spherical distribution axial plunger pump, and this pump adopts former and later two sliding bearing supports main shaft, sphere distributing construction.From the structural drawing announced, front and back bearings is all in closed containing cavity, and can not be formed with the water in housing chamber and circulate, front and back bearings all can not get effective lubrication, cooling.The heavy wear of front and back bearings certainly will be caused in the working procedure of pump to lose efficacy, and practicability is not strong.
Chinese patent (CN 102141022A) discloses a kind of Double-swashplate valve distributing axial plunger-type water hydraulic canned motor pump, during this pump work, rotor banding moves conical cylinder rotation, flow-distributing valve rotates in conical cylinder thereupon, and Port Plate Pair rotation easily causes pump water suction not enough.Therefore this kind of pump suction capacity is poor, and rotating speed is difficult to improve.
Chinese patent (CN 102734109) discloses a kind of fully water lubricating Flat valve plunger water pump, and during this pump work, main shaft drives swash plate to rotate, and adopts roller bearing supports.During this kind of pump work there is the problem of dynamic unbalance in swash plate, and roller bearing is not suitable for the occasion of fully water lubricating.
Summary of the invention
Complicated in order to overcome existing pure water hydraulics plunger pump structure, suction capacity is poor, and greatly, sliding bearing such as easily to lose efficacy at the shortcoming flow noise, for pure water pressure transmission system provides the high pressure water of enough pressure, flow.The invention provides a kind of oblique plunger type pure water hydraulic swash plate pump, by rational structural design, improve the suction capacity of pure water hydraulics plunger pump, improve the operating mode of critical component, practicability is very strong.
The present invention adopts following technological means, a kind of oblique plunger type pure water hydraulic swash plate pump, and wherein front cover 3, housing 10, rear end cover 16 connect as one; Main shaft 1 is connected with conical cylinder 11, forms main shaft-conical cylinder assembly; Front slide bearing 28 is embedded in front cover 3, is connected with main shaft 1; Rear support axle 15 is connected with rear end cover 16 interference, and it is inner that rear sliding bearing 12 is embedded in conical cylinder 11; Helical water-through groove 13 all offered by the bearing shell of front slide bearing 28 and rear sliding bearing 12; Main shaft 1 is provided with cross water port B22 and radial water port 25, rear support axle is provided with cross water port A14, front cover 3 offers annular water-flowing trough 5, oblique water port 4 and axial water port 27, the lubricating channels of front slide bearing 28, rear sliding bearing 12 is communicated with the cavity of housing 10.
Ball pivot 8 one end coordinates with return plate 7 inner circle and forms typed ball bearing pair, return plate 7 is uniformly distributed several holes, is adjacent on swash plate 6 by the piston shoes 23 of identical number; Ball pivot 8 the other end is connected by belleville spring 24 with conical cylinder 11.
Cylinder holes 19 has angle with the center line of main shaft 1 and is uniformly distributed, force fit cylinder sleeve 20 in each cylinder holes 19, and plunger 21 bulb and piston shoes 23 ball-and-socket form plunger assembly, and cylinder sleeve 20 and plunger assembly form trunk piston set; Plunger 21 is communicated with the kidney slot 17.2 on thrust plate 17 by corresponding cylinder holes 19; Conical cylinder bottom inner ball surface 11.1 and thrust plate outer spherical surface 17.1 form spherical port plate; Thrust plate 17 is installed on rear end cover 16 by screw 18, and reverse side assembling O RunddichtringO realizes sealing.
In the present invention, cylinder holes 19 is 1 ° ~ 15 ° with the angle of main shaft 1 center line.
The implementation of bearing pair of the present invention: front slide bearing 28, rear sliding bearing 12 make rear elastic conjunction in front cover 3, conical cylinder 11 by the high-abrasive material such as polymer composite or pottery, or employing Shooting Technique, directly by polymer composite molding and forming in front cover 3, conical cylinder 11; Helical water-through groove 13 all offered by bearing shell, groove offered by front cover 3 annular water-flowing trough 5, oblique water port 4 and axial water port 27, communicate with the cavity of housing 10.The fluid of Bearing inner can be formed with the fluid in housing chamber circulate, adequately achieve the lubrication and cooling of bearing.
The implementation of trunk piston set of the present invention: cylinder sleeve 20 adopts corrosion resistant alloy or stupalith to make, the cylinder sleeve 20 that corrosion resistant alloy is made improves its hardness and wear resistance through Overheating Treatment, and carries out surface Hardening Treatment to its inner circle; The plunger bushing 21.2 that plunger matrix 21.1 surface inserting one is made up of polymer composite, and fixed by gland nut 21.4, locking nut carries out axial limiting by pin 21.5; Force fit stemming rod 21.3 in the plunger hole of plunger 21, reduces the volume of plunger cavity.
The implementation of Slipper coupling of the present invention: piston shoes 23 comprise the metallic matrix having offered multiple tapped hole, on matrix, injection moulding one deck polymer composite layer, for rubbing surface, forms Slipper coupling with swash plate 6.Swash plate 6 adopts corrosion resistant alloy material to make, and improves hardness and the wear resistance on its friction inclined-plane by heat treatment and surface modification treatment.
The implementation of Port Plate Pair of the present invention: thrust plate 17 comprises the metallic matrix having offered multiple tapped hole, on matrix, injection moulding one deck polymer composite layer, is processed into outer spherical surface 17.1 by thrust plate front and is used for rubbing surface; Conical cylinder bottom inner ball surface 11.1 improves its hardness and wear resistance by heat treatment and surface modification treatment, forms Port Plate Pair with thrust plate outer spherical surface 17.1.
The polymer composite that the present invention adopts is PEEK or other wear-resisting level engineering plastics, and stemming rod 21.3 material is nylon or other engineering plastics, and corrosion resistant alloy is stainless steel or titanium alloy material.
The present invention can obtain following beneficial effect:
1. bearing pair adopts screw lubrication groove structure, and the fluid in lubrication groove and the fluid in the pump housing form and circulate, and are conducive to the lubrication of bearing, cooling, improve working life and the functional reliability of bearing.
2. adopt semi-shaft type structure, fore bearing supports main shaft, rear cylinder inner bearing supports conical cylinder, and bearing arrangement is reasonable, front and back bearings PV value is uniformly distributed, avoids the heavy wear that bearing causes due to unbalance stress.Simultaneously, sliding bearing can the disturbing moment of equilibrium assignment dish, improves the stable working of pump.
3. the relative transmission main shaft of plunger coning layout, the centripetal force produced during work is conducive to the backhaul of plunger, and conical cylinder makes the oil-distribution port pitch diameter of thrust plate reduce, and reduces water suction flow velocity, strengthens suction capacity, reduce flow noise.
4. adopt sphere distributing construction, be conducive to the disturbing moment balancing conical cylinder generation during work, improve the self-alignment of conical cylinder and thrust plate, eliminate the floating lining plate structure of existing inclined disc type water pressure plunger pump, reduce difficulty of processing, make pump structure compacter.
5. adopt belleville spring to provide the pre-pressing force of Slipper coupling, Port Plate Pair and the reverberation matrix method of plunger, the shortcoming that the cylindrically coiled spring overcoming the employing of other water pressure plunger pump easily lost efficacy, enhance operating life and the reliability of pump stroke reversal spring.
6. main friction pairs all adopts macromolecule to meet material and corrosion resistant alloy or pottery matches, and can meet water hydraulic pump to crucial friction pair fretting wear, corrosion proof requirement.
7. the metallic matrix of piston shoes, thrust plate has all offered multiple threaded apertures, has made the polymer composite after injection moulding embed threaded apertures, enhance the connecting forces between injection molded layers and metallic matrix.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is conical cylinder structural representation;
Fig. 3 is port plate structure schematic diagram;
Fig. 4 is the structural representation of trunk piston set.
In figure: 1 main shaft, 2 shaft seals, 3 front covers, 4 oblique water ports, 5 annular water-flowing troughs, 6 swash plates, 7 return plates, 8 ball pivots, 9 bleed screws, 10 housings, 11 conical cylinder, 11.1 inner ball surface, sliding bearing after 12, 13 helical water-through grooves, 14 cross water-flowing trough A, 15 rear support axles, 16 rear end covers, 17 thrust plates, 17.1 outer spherical surfaces, 17.2 kidney slots, 16.3 high pressure kidney slot, 18 screws, 19 cylinder holes, 20 cylinder sleeves, 21 plungers, 21.1 plunger matrix, 21.2 plunger bushings, 21.3 stemming rods, 21.4 locking nuts, 22 cross water port B, 23 piston shoes, 24 belleville springs, 25 radial water ports, 26 locating studs, 27 axial water ports, 28 front slide bearings.
Embodiment
Below in conjunction with the accompanying drawing 1 ~ 4 in section Example of the present invention, embodiments of the present invention are illustrated in further detail.Obviously, described embodiment is only all embodiments' of a present invention part.Those of ordinary skill in the art are not making under creative work prerequisite, and other embodiments directly obtaining from content disclosed by the invention or associate, all belong to protection scope of the present invention.
The embodiment of the present invention provides a kind of oblique plunger type pure water hydraulic swash plate pump.As shown in Figure 1, front cover 3, housing 10, rear end cover 16 connect as one; Main shaft 1 is connected with conical cylinder 11, forms main shaft-conical cylinder assembly; Front slide bearing 28 is embedded in front cover 3, is connected with main shaft 1; Rear support axle 15 is connected with rear end cover 16 interference, and it is inner that rear sliding bearing 12 is embedded in conical cylinder 11; Helical water-through groove 13 all offered by the bearing shell of front slide bearing 28 and rear sliding bearing 12; Main shaft 1 is provided with cross water port B 22 and radial water port 25, rear support axle is provided with cross water port A 14, front cover 3 offers annular water-flowing trough 5, oblique water port 4 and axial water port 27, the lubricating channels of front slide bearing 28, rear sliding bearing 12 is communicated with the cavity of housing 10.Housing 10 is provided with plug screw 9, opens when pump does not work, discharge air, prevent the generation of cavitating, use shaft seal 2 pairs of main shafts 1 to carry out end face seal.
Ball pivot 8 one end coordinates with return plate 7 inner circle and forms typed ball bearing pair, return plate 7 is uniformly distributed several holes, is adjacent on swash plate 6 by the piston shoes 23 of identical number; Ball pivot 8 the other end is connected by belleville spring 24 with conical cylinder 11.
Cylinder holes 19 has angle with the center line of main shaft 1 and is uniformly distributed, force fit cylinder sleeve 20 in each cylinder holes 19, and plunger 21 bulb and piston shoes 23 ball-and-socket form plunger assembly, and cylinder sleeve 20 and plunger assembly form trunk piston set; Plunger 21 is communicated with the kidney slot 17.2 on thrust plate 17 by corresponding cylinder holes 19; Conical cylinder bottom inner ball surface 11.1 and thrust plate outer spherical surface 17.1 form spherical port plate; Thrust plate 17 is installed on rear end cover 16 by screw 18, and reverse side assembling O RunddichtringO realizes sealing.
Oblique plunger type pure water hydraulic swash plate pump, its cylinder holes 19 is 1 ° ~ 15 ° with the angle of main shaft 1 center line.
Oblique plunger type pure water hydraulic swash plate pump, its discharging water and lubrication, cooling work process are as follows: pump prestart, working water flows into the cavity of housing 10 by the water intake of pump, low-pressure water in housing chamber is respectively by the cross water port B 22 on main shaft, annular water-flowing trough 5 on front cover 3, axial water port 27, oblique water port 4 enter in the helical water-through groove 13 of rear sliding bearing 12, front slide bearing 28, and make the cavity of the whole pump housing be full of working medium water equably; During pump work, the kidney slot 17.2 of the water in housing 10 on thrust plate 17, sucks plunger cavity by plunger 21, and when plunger motion is to swash plate upper dead center, water suction terminates; After plunger 21 turns over upper dead center, start drainage procedure.Low-pressure water now in pump chamber, while discharge the pump housing through thrust plate kidney slot 17.2 from the water outlet of pump by plunger 21, is constantly supplemented from the water inlet of pump again.Define the flow circuit effect of water in pump chamber, the heat produced is taken away, be conducive to the lubrication of friction pair, cooling during each friction pair work.Due to plunger 21 relative main 1 coning layout, the centripetal force produced when therefore working is conducive to the backhaul of plunger 21, and conical cylinder 11 makes the oil-distribution port pitch diameter of thrust plate 17 reduce, and reduces water suction flow velocity, strengthens suction capacity, reduce flow noise.
The implementation of trunk piston set of the present invention: as shown in Figure 4, plunger matrix 21.1 adopts corrosion resistant alloy to make, the plunger bushing 21.2 that surface inserting one is made up of polymer composite, and by locking nut 21.4 fixing and locking, ensure that plunger bushing 21.2 does not come off in pump operation process; Locking nut carries out axial limiting by pin 21.5; Force fit stemming rod 21.3 in the plunger hole of plunger 21, reduces the volume of plunger cavity.The cylinder sleeve 20 coordinated with plunger 21 adopts corrosion resistant alloy or stupalith to make, and improves its hardness and wear resistance by heat treatment and to the surface Hardening Treatment of inner circle.
The implementation of bearing pair of the present invention: front slide bearing 28, rear sliding bearing 12 make rear elastic conjunction in front cover 3, conical cylinder 11 by the high-abrasive material such as polymer composite or pottery, or employing Shooting Technique, directly by polymer composite molding and forming in front cover 3, conical cylinder 11; Helical water-through groove 13 all offered by bearing shell, groove offered by front cover 3 annular water-flowing trough 5, oblique water port 4 and axial water port 27, communicate with the cavity of housing 10.The fluid of Bearing inner can be formed with the fluid in housing chamber circulate, sliding bearing obtains sufficient lubrication and cooling.
The implementation of end-surface friction pair auto-compensation of the present invention: belleville spring 24 two ends contact with ball pivot 8, conical cylinder 11 respectively.Under spring force, conical cylinder 11 can axially produce floating of trace, when conical cylinder is subject to the disturbing moment of swash plate 6 generation and axial small skew occurs, due to the existence of conical cylinder bottom inner ball surface 11.1 and thrust plate outer spherical surface 17.1 structure, the inclination of compensating axial unbalance loading generation under spring force, ensure that conical cylinder 11 is adjacent to thrust plate 17 all the time, the gap between auto-compensation conical cylinder 11 and thrust plate 17, reduce leakage rate; When piston shoes 23, thrust plate 17 end wear amount increase, under the effect of belleville spring 24, piston shoes 23 and swash plate 6, thrust plate 17 and conical cylinder 11 are adjacent to again, compensate for wear amount.
The implementation of Port Plate Pair of the present invention: thrust plate 17 comprises the metallic matrix having offered multiple tapped hole, on matrix, injection moulding one deck polymer composite layer, is processed into outer spherical surface 17.1 by thrust plate front and is used for rubbing surface; Conical cylinder bottom inner ball surface 11.1 improves its hardness and wear resistance by heat treatment and surface modification treatment (nitrogenize, laser melting coating pottery etc.), forms Port Plate Pair with thrust plate outer spherical surface 17.1.
Piston shoes 23 of the present invention, front slide bearing 28, rear sliding bearing 12 all can adopt the technique of injection moulding one deck polymer composite on metallic matrix, metallic matrix is all offered multiple tapped hole, make the polymer composite after injection moulding embed threaded apertures, enhance the connecting forces between injection molded layers and metallic matrix.
The polymer composite that the present invention adopts is PEEK or other wear-resisting level engineering plastics, and stemming rod 21.3 material is nylon or other engineering plastics, and corrosion resistant alloy is stainless steel or titanium alloy material.
Claims (10)
1. oblique plunger type pure water hydraulic swash plate pump, wherein front cover (3), housing (10), rear end cover (16) connect as one; Main shaft (1) is connected with conical cylinder (11), forms main shaft-conical cylinder assembly; Front slide bearing (28) is embedded in front cover (3), is connected with main shaft (1); Rear support axle (15) is connected with rear end cover (16) interference, and it is inner that rear sliding bearing (12) is embedded in conical cylinder (11), is connected with conical cylinder (11); The bearing shell of front slide bearing (28) and rear sliding bearing (12) is all offered helical water-through groove (13); Main shaft (1) is provided with cross water port B (22) and radial water port (25), rear support axle (15) is provided with cross water port A (14), front cover (3) offers annular water-flowing trough (5), oblique water port (4) and axial water port (27), the lubricating channels of front slide bearing (28), rear sliding bearing (12) is communicated with the cavity of housing (10);
Ball pivot (8) one end coordinates with return plate (7) inner circle and forms typed ball bearing pair, and (7) are uniformly distributed several holes to return plate, are adjacent on swash plate (6) by the piston shoes (23) of identical number; Ball pivot (8) the other end is connected by belleville spring (24) with conical cylinder (11);
Cylinder holes (19) has angle with the center line of main shaft (1) and is uniformly distributed, force fit cylinder sleeve (20) in each cylinder holes (19), plunger (21) bulb and piston shoes (23) ball-and-socket form plunger assembly, and cylinder sleeve (20) and plunger assembly form trunk piston set; Plunger (21) is communicated with the kidney slot (17.2) on thrust plate (17) by corresponding cylinder holes (19); Conical cylinder bottom inner ball surface (11.1) and thrust plate outer spherical surface (17.1) form spherical port plate; Thrust plate (17) is installed on rear end cover (16) by screw (18), and reverse side assembling O RunddichtringO realizes sealing.
2. oblique plunger type pure water hydraulic swash plate pump according to claim 1, is characterized in that: described cylinder holes (19) is 1 ° ~ 15 ° with the angle of main shaft (1) center line.
3. oblique plunger type pure water hydraulic swash plate pump according to claim 1, it is characterized in that: described front slide bearing (28), rear sliding bearing (12) make rear elastic conjunction in front cover (3), conical cylinder (11) by polymer composite or pottery, or employing Shooting Technique, direct by polymer composite molding and forming in front cover (3), conical cylinder (11); Bearing shell is all offered helical water-through groove (13), groove offered by front cover (3) annular water-flowing trough (5), oblique water port (4) and axial water port (27), communicate with the cavity of housing (10).
4. oblique plunger type pure water hydraulic swash plate pump according to claim 1, it is characterized in that: described cylinder sleeve (20) adopts corrosion resistant alloy or stupalith to make, the cylinder sleeve (20) that corrosion resistant alloy is made improves its hardness and wear resistance through Overheating Treatment, and carries out surface Hardening Treatment to its inner circle; The plunger bushing (21.2) that plunger matrix (21.1) surface inserting one is made up of polymer composite, and by locking nut (21.4) fixing and locking, locking nut carries out axial limiting by pin (21.5); Force fit stemming rod (21.3) in the plunger hole of plunger (21), reduces the volume of plunger cavity.
5. oblique plunger type pure water hydraulic swash plate pump according to claim 1, it is characterized in that: described piston shoes (23) comprise the metallic matrix having offered multiple tapped hole, injection moulding one deck polymer composite layer on matrix, for rubbing surface, form Slipper coupling with swash plate (6); Swash plate (6) adopts corrosion resistant alloy material to make, and improves hardness and the wear resistance on its inclined-plane by heat treatment and surface modification treatment.
6. oblique plunger type pure water hydraulic swash plate pump according to claim 1, it is characterized in that: described thrust plate (17) comprises the metallic matrix having offered multiple tapped hole, injection moulding one deck polymer composite layer on matrix, is processed into outer spherical surface (17.1) for rubbing surface by thrust plate front; Its hardness and wear resistance are improved by heat treatment and surface modification treatment in conical cylinder bottom inner ball surface (11.1), form Port Plate Pair with thrust plate outer spherical surface (17.1).
7. oblique plunger type pure water hydraulic swash plate pump according to claim 3, is characterized in that: described polymer composite is PEEK or other wear-resisting level engineering plastics.
8. oblique plunger type pure water hydraulic swash plate pump according to claim 4, is characterized in that: stemming rod (21.3) material is nylon or other engineering plastics.
9. oblique plunger type pure water hydraulic swash plate pump according to claim 4, is characterized in that: the corrosion resistant alloy of cylinder sleeve (20) is stainless steel or titanium alloy material.
10. oblique plunger type pure water hydraulic swash plate pump according to claim 5, is characterized in that: the corrosion resistant alloy of swash plate (6) is stainless steel or titanium alloy material.
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| CN201310082079.2A CN103184990B (en) | 2013-03-14 | 2013-03-14 | Oblique plunger type pure water hydraulic swash plate pump |
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| DE102014221778A1 (en) * | 2014-10-27 | 2016-04-28 | Robert Bosch Gmbh | transmission module |
| DE102015107343A1 (en) * | 2015-05-11 | 2016-11-17 | Linde Hydraulics Gmbh & Co. Kg | Hydrostatic axial piston machine in bent axis design |
| WO2017015782A1 (en) * | 2015-07-24 | 2017-02-02 | 杭州绿聚科技有限公司 | Novel axial piston pump |
| CN104989613A (en) * | 2015-08-11 | 2015-10-21 | 贵阳海之力液压有限公司 | Novel minitype swash plate type plunger pump and motor |
| CN105526050B (en) * | 2015-12-04 | 2017-07-25 | 安徽理工大学 | A kind of axial plunger pump or motor of full floating cylinder body |
| CN105604816A (en) * | 2016-03-16 | 2016-05-25 | 无锡市华科力士水液压有限公司 | Novel tilting plate type variable water hydraulic 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 |
| DE102016223307A1 (en) | 2016-11-24 | 2018-05-24 | Danfoss Power Solutions Gmbh & Co. Ohg | HYDRAULIC AXIAL PISTON UNIT WITH CENTRALLY FIXED LOW HOLDER |
| CN106837778B (en) * | 2017-03-23 | 2018-12-07 | 华中科技大学 | A kind of pressure lifting plunger slippery boots assembly |
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