CN209569155U - A kind of axial plunger pump or motor piston shoes and plunger piston slippery boots assembly - Google Patents

A kind of axial plunger pump or motor piston shoes and plunger piston slippery boots assembly Download PDF

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Publication number
CN209569155U
CN209569155U CN201821960919.5U CN201821960919U CN209569155U CN 209569155 U CN209569155 U CN 209569155U CN 201821960919 U CN201821960919 U CN 201821960919U CN 209569155 U CN209569155 U CN 209569155U
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China
Prior art keywords
ball
piston shoes
drag reduction
slot
socket
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CN201821960919.5U
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Chinese (zh)
Inventor
孙珍菊
肖刚
汤和荣
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Jiangsu XCMG Construction Machinery Institute Co Ltd
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Jiangsu XCMG Construction Machinery Institute Co Ltd
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Abstract

The utility model discloses a kind of axial plunger pump or motor piston shoes and plunger piston slippery boots assembly, including piston shoes ontology, it is provided with ball-and-socket on piston shoes ontology, drag reduction slot and crumple groove are offered on the ball-and-socket inner wall, drag reduction slot, crumple groove are connected with ball-and-socket respectively;Drag reduction slot reduces the friction of plunger ball, piston shoes relative motion for storing lubricating oil;Crumple groove, provides storage location for the material to local deformation, reduces plunger ball and piston shoes inner wall contact surface, generates sphere abrasion because piston shoes contact surface material deforms to reduce;Ball-and-socket includes the hemisphere portion of lower part and the cylindrical body portion on top, and the diameter in the hemisphere portion is equal to the diameter in cylindrical body portion;Drag reduction slot is arranged in the hemisphere portion of the ball-and-socket or the junction in the hemisphere portion and cylindrical body portion is arranged in;The cylindrical body portion of the ball-and-socket is arranged in the crumple groove.

Description

A kind of axial plunger pump or motor piston shoes and plunger piston slippery boots assembly
Technical field
The utility model belongs to technical field of engineering machinery, is related to a kind of piston shoes, in particular to a kind of axial plunger pump or Motor piston shoes and plunger piston slippery boots assembly.
Background technique
Axial plunger pump/motor is dynamical element and executive component important in hydraulic system, is widely used in industry It is that most wide one of Hydraulic Elements are used in Modern hydraulic element with walking machine field.The dynamics of plunger piston slippery boots assembly is special Property directly determines the working performance of pump.When pump/motor when rotating at high speed, plunger piston slippery boots assembly be tightly attached on swash plate with Cylinder body moves together, in pump/motor operation cycle, exists such as centrifugal force, piston shoes friction force and plunger and cylinder holes contact forces All with the active force of time-varying, these power influence the reliability of pump/motor internal core components, become colleges and universities equal size and Orientations And research institution's scientific research emphasis.
Plunger piston slippery boots assembly is to enable bulb in certain angle range by withholding packet ball technique for bulb packet into piston shoes Interior flexible rotating adapts to the movement of swash plate and cylinder body.And in actual production process as existing for the structure design of plunger piston slippery boots There is phenomena such as rotating not flexible, clamping stagnation, bulb abrasion, shaking off in problem, the plunger piston slippery boots assembly after leading to withhold packet ball.
In the prior art, the surface that piston shoes inner wall is contacted with bulb does not have groove, and plunger ball and piston shoes inner wall are spherical surfaces Contact, withholds packet ball back-plunger bulb and is tightly buckled together with piston shoes.
The prior art has the following deficiencies: that (1) plunger ball and piston shoes can make in piston shoes after withholding packet ball technique Wall material is deformed, and causes piston shoes inner wall uneven, plunger ball and piston shoes can be made to generate ball in relative motion in this way Head abrasion;
(2) plunger ball and piston shoes are sphere-contacts, cause greasy property poor, in plunger ball and piston shoes relative motion When, it has plunger ball and rotates not flexible, catching phenomenon, with cylinder body rotary motion, it may appear that plunger takes off boots phenomenon;
(3) plunger ball and piston shoes sphere-contact, relative clearance is small, and lubricating oil can not store, and causes ball head sliding shoe unlubricated friction It wipes, can also reduce the service life of plunger ball and piston shoes.
Utility model content
Purpose: in order to overcome the deficiencies in the prior art, the utility model provides a kind of axial plunger pump or motor With piston shoes and plunger piston slippery boots assembly.
Technical solution: in order to solve the above technical problems, the technical solution adopted by the utility model is:
A kind of axial plunger pump or motor piston shoes, which is characterized in that including piston shoes ontology,
It is provided with ball-and-socket on the piston shoes ontology, drag reduction slot and crumple groove, the drag reduction are offered on the ball-and-socket inner wall Slot, crumple groove are connected with ball-and-socket respectively;
The drag reduction slot reduces the friction of plunger ball, piston shoes relative motion for storing lubricating oil;
The crumple groove provides storage location for the material to local deformation, reduces plunger ball and connect with piston shoes inner wall Contacting surface generates sphere abrasion because piston shoes contact surface material deforms to reduce;
The ball-and-socket includes the hemisphere portion of lower part and the cylindrical body portion on top, and the diameter in the hemisphere portion is equal to cylinder The diameter in body portion;The cylindrical body portion is connected with hemisphere portion;
The drag reduction slot is arranged in the hemisphere portion of the ball-and-socket or the company in the hemisphere portion and cylindrical body portion is arranged in Meet place;
The cylindrical body portion of the ball-and-socket is arranged in the crumple groove.
Preferably, it is characterised in that: the drag reduction slot is annular recess.
It is furthermore preferred that the drag reduction slot is the annular recess along hemisphere portion circumference, the central axis of the drag reduction slot Line is overlapped with the central axis of piston shoes ontology.Further, the diameter range of the drag reduction slot is the diameter in hemisphere portion 1.006~1.01 times, width range is 0.5~1mm.
Preferably, the crumple groove is annular recess.
It is furthermore preferred that the crumple groove is the annular recess along cylindrical body portion circumference;The central axis of the crumple groove Line is overlapped with the central axis of piston shoes ontology.Further, the diameter range of the crumple groove is the diameter in hemisphere portion 1.003~1.006 times, width range is 0.6~1.2mm.
Preferably, the drag reduction slot, crumple groove are the groove of annular setting;The width of the crumple groove is greater than The width of drag reduction slot, the diameter of the crumple groove are less than the diameter of drag reduction slot;
The junction in the hemisphere portion and cylindrical body portion is arranged in the drag reduction slot;And the center line of drag reduction slot crosses hemisphere The centre of sphere in body portion, the crumple groove are disposed adjacent with drag reduction slot, and are located above drag reduction slot.
As a preferred embodiment, the drag reduction slot is the annular recess that inner side end is bevel edge, the bottom of the drag reduction slot Diameter is held to be greater than top end diameter;The bottom diameter of the drag reduction slot is 1.0075~1.01 times of the diameter in hemisphere portion;And tiltedly The angle k of side and horizontal plane is 90 ° of 30 °≤k <.
As another preferred embodiment, the crumple groove is the annular recess that inner side end is bevel edge, the crumple groove Bottom diameter is greater than top end diameter;And the angle k of bevel edge and horizontal plane is 90 ° of 30 °≤k <.
Further, the piston shoes body bottom portion is provided with oil sump, and oil duct, oil sump are provided between the oil sump and ball-and-socket It is connected with ball-and-socket by oil duct;The oil duct includes cone slot, oil-through-hole and oil storage tank;The cone slot is arranged above oil sump, And it is connected with oil sump;The oil storage tank setting is connected below ball-and-socket, and with ball-and-socket;Described oil-through-hole one end and cone slot phase Connection, the other end are connected with oil storage tank.
The utility model also provides a kind of plunger piston slippery boots assembly, which is characterized in that including plunger body and above-mentioned axial direction Plunger pump or motor piston shoes, plunger body end are provided with plunger ball, and the plunger ball is matched with the ball-and-socket of piston shoes.
The utility model has the advantages that axial plunger pump provided by the utility model or motor piston shoes and plunger piston slippery boots assembly, have with Lower advantage: (1) presence of crumple groove can reduce the contact area for withholding plunger ball and piston shoes inner wall in packet ball technical process;From And reduce the friction of plunger ball and piston shoes, it improves service life;(2) crumple groove, which can also reduce, withholds in packet ball technical process The material of bulb and piston shoes inner wall contact surface deforms, to reduce because rubbing caused by the rough material of contact surface;(3) it bursts Contracting slot can effectively reduce wall friction in plunger ball and piston shoes, improve the service life of plunger piston slippery boots assembly;(4) drag reduction slot is in column When plug bulb does spherical surface secondary motion in ball-and-socket, increase in bulb, top lubrication, reduces dry friction, effectively improve plunger ball Rotation flexibility, prevent plunger ball occur catching phenomenon;(5) plunger piston slippery boots assembly is to be tightly attached on swash plate to do high-speed motion , the presence of crumple groove, drag reduction slot reduces the quality of piston shoes, to reduce the centrifugal force in motion process, reduces column The probability for filling in piston shoes flying disc, improves the robust motion of plunger piston slippery boots assembly;(6) crumple groove, drag reduction slot composite structure, can subtract The friction of small plunger bulb contact surface and the material deformation for withholding the generation of packet ball technique, increase bulb middle and upper part lubrication, improve column It fills in slippery boots assembly and rotates flexibility;(7) subtract rent slot simultaneously, crumple groove can store and wear the broken of generation between plunger ball and piston shoes Bits prevent bulb and ball-and-socket from generating adhesive wear;(8) the processing is simple for drag reduction slot, crumple groove, it is easy to accomplish.
Detailed description of the invention
Fig. 1 is the piston shoes structure chart of an embodiment;
Fig. 2 is the piston shoes structure chart of another embodiment;
Fig. 3 is the partial enlarged view of Fig. 2;
Fig. 4 is the piston shoes structure chart of another embodiment;
Fig. 5 is the piston shoes structure chart of another embodiment;
Fig. 6 is the plunger piston slippery boots assembly view of embodiment.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Be to the description only actually of at least one exemplary embodiment below it is illustrative, never as to this is practical Novel and its application or any restrictions used.Based on the embodiments of the present invention, those of ordinary skill in the art are not having Every other embodiment obtained under the premise of creative work is made, is fallen within the protection scope of the utility model.
Unless specifically stated otherwise, positioned opposite, the digital table of the component and step that otherwise illustrate in these embodiments Up to the unlimited the scope of the utility model processed of formula and numerical value.Simultaneously, it should be appreciated that for ease of description, each shown in attached drawing The size of a part is not to draw according to actual proportionate relationship.For skill known to person of ordinary skill in the relevant Art, method and apparatus may be not discussed in detail, but in the appropriate case, and the technology, method and apparatus should be considered as awarding Weigh part of specification.In shown here and discussion all examples, any occurrence should be construed as merely example Property, not as limitation.Therefore, the other examples of exemplary embodiment can have different values.It should also be noted that similar Label and letter similar terms are indicated in following attached drawing, therefore, once be defined in a certain Xiang Yi attached drawing, then with In attached drawing afterwards do not need that it is further discussed.
Withhold packet ball --- it is a kind of assembly technology, piston shoes groove, which encases plunger ball, to be allowed to slip, and allows plunger Bulb does the rotation of certain angle in piston shoes groove.
Crumple groove 7 --- the groove of piston shoes inner wall and bulb contact site can reduce the material during withholding packet ball and become Shape.
Drag reduction slot 6 --- the groove of piston shoes inner wall and bulb contact site reduces plunger, cunning for storing lubricating oil The friction of boots relative motion.
In some embodiments, as shown in Figure 1, a kind of axial plunger pump/motor piston shoes, including piston shoes ontology 1,
It is provided with ball-and-socket 8 on the piston shoes ontology 1, offers drag reduction slot 6 and crumple groove 7 on 8 inner wall of ball-and-socket, it is described Drag reduction slot 6, crumple groove 7 are connected with ball-and-socket 8 respectively;
The drag reduction slot 6 reduces the friction of plunger ball, piston shoes relative motion for storing lubricating oil;
The crumple groove 7 provides storage location for the material to local deformation, reduces plunger ball and connect with piston shoes inner wall Contacting surface generates sphere abrasion because piston shoes contact surface material deforms to reduce;
The ball-and-socket 8 includes the hemisphere portion 81 of lower part and the cylindrical body portion 82 on top, the diameter in the hemisphere portion 81 Equal to the diameter in cylindrical body portion 82;The cylindrical body portion 82 is connected at the diameter in the hemisphere portion 81 with hemisphere portion 81 It is logical;
The drag reduction slot 6 is arranged in the hemisphere portion 81 of the ball-and-socket 8 or is arranged in the hemisphere portion 81 and cylindrical body The junction in portion 82;
The cylindrical body portion 82 of the ball-and-socket 8 is arranged in the crumple groove 7.
Further, the drag reduction slot 6, crumple groove 7 are the groove structure that 8 inner surface of ball-and-socket opens up.Groove structure can be with It can be the groove of annular recess, square groove, circular groove or other shapes to be continuous or discontinuous.
In some embodiments, as shown in Figure 1 and Figure 2, it is preferred that the drag reduction slot 6, crumple groove 7 are annular recess.
More preferably, in some embodiments, as shown in figure 1, figure 2, figure 3, figure 4 and figure 5, the drag reduction slot 6 is along half The central axis of the annular recess of 81 circumference of spherical part, the drag reduction slot 6 is overlapped with the central axis of piston shoes ontology.It is described Crumple groove 7 is the annular recess along 82 circumference of cylindrical body portion;The central axis of the crumple groove 7 and the center of piston shoes ontology Axis is overlapped.
In the present embodiment, the crumple groove 7 is arranged in parallel with the drag reduction slot 6, crumple groove 7 and be arranged on drag reduction slot 6 Side.
Further, the diameter range of the drag reduction slot 6 is 1.006~1.01 times of the diameter in hemisphere portion 81, width Range is 0.5~1mm;The drag reduction slot 6 is the 0 of the diameter in hemisphere portion 81 at a distance from the diameter center face in hemisphere portion 81 ~0.2 times.
Further, the diameter range of the crumple groove 7 is 1.003~1.006 times of the diameter in hemisphere portion 81, width Range is 0.6~1.2mm;The crumple groove 7 is the diameter in hemisphere portion 81 at a distance from the diameter center face in hemisphere portion 81 0.001~0.2 times.
In some embodiments, as shown in Figure 1,1 bottom of piston shoes ontology is provided with oil sump 2, the oil sump 2 and ball-and-socket Oil duct c is provided between 8, oil sump 2 is connected with ball-and-socket 8 by oil duct c;The oil duct c includes cone slot 3, oil-through-hole 4 and oil storage Slot 5;The setting of cone slot 3 is connected above oil sump 2, and with oil sump 2;The oil storage tank 5 is arranged below ball-and-socket 8, and with Ball-and-socket 8 is connected;Described 4 one end of oil-through-hole is connected with cone slot 3, and the other end is connected with oil storage tank 5.
In some embodiments, as shown in Figures 2 to 5, the drag reduction slot 6, crumple groove 7 are the recessed of horizontal annular setting Slot;The width of the crumple groove 7 is greater than the width of drag reduction slot 6;The diameter of the crumple groove 7 is less than the diameter of drag reduction slot 6;It is described The junction in the hemisphere portion 81 and cylindrical body portion 82 is arranged in drag reduction slot 6;And the more than half spherical parts 81 of center line of drag reduction slot 6 Centre of sphere s, the crumple groove 7 is disposed adjacent with drag reduction slot 6, and is located at 6 top of drag reduction slot.
In some embodiments, as shown in figure 5, the drag reduction slot 6 is the identical annular recess of inner side end depth;Crumple Slot 7 is also the identical annular recess of inner side end depth.Unlike embodiment illustrated in fig. 1, the drag reduction slot 6, crumple groove 7 It is disposed adjacent.
In some embodiments, as shown in Figure 2 and Figure 3, the drag reduction slot 6 is the annular recess that inner side end is bevel edge, institute The bottom diameter for stating drag reduction slot 6 is greater than top end diameter;And the angle k of bevel edge and horizontal plane is 90 ° of 30 °≤k <.Crumple groove 7 is The identical annular recess of inner side end depth.
In some embodiments, as shown in figure 4, the drag reduction slot 6 is the identical annular recess of inner side end depth;It is described Crumple groove 7 is the annular recess that inner side end is bevel edge, and the bottom diameter of the crumple groove 7 is greater than top end diameter;And bevel edge with The angle k of horizontal plane is 90 ° of 30 °≤k <.
In addition, assembling initial stage in plunger and piston shoes, running in stage has subtle part clast and generates, crumple groove, drag reduction slot Combined presence can accommodate clast, avoid the adhesive wear inside bulb or piston shoes.
L-G simulation test is carried out to the piston shoes in above-described embodiment, verifying conclusion is as follows:
(1) crumple groove, drag reduction slot combine the lubrication that can increase plunger ball and piston shoes, and reliability test 300h does not have found Obvious abrasion mark;
(2) the plunger pump/motor of this piston shoes structure, volumetric efficiency >=91.15% are applied, mechanical efficiency >=87.24% meets Engineering machinery requirement;
(3) the piston shoes plunger assembly for applying this structure slips the more single slot structure of power and increases by 18% or so.
In some embodiments, as shown in fig. 6, a kind of plunger piston slippery boots assembly, including piston shoes ontology 1 and plunger body 9, column 9 end of plug body is provided with plunger ball 10, and ball-and-socket 8, the plunger ball 10 and piston shoes are provided on the piston shoes ontology 1 Ball-and-socket 8 matches, and offers drag reduction slot 6 and crumple groove 7 on 8 inner wall of ball-and-socket.
As shown in fig. 6, plunger ball 10 is put in the ball-and-socket 8 of piston shoes ontology 1, after being withheld packet ball technique, ball-and-socket 8 is tightly Plunger ball 10 is embraced, plunger ball 10 is made to do spherical surface secondary motion in ball-and-socket 8, and due to piston shoes top during withholding packet ball It is squeezed to the crumple of ball-and-socket center, generates local material deformation, the presence of crumple groove 7 at this time is deposited to the material offer of local deformation Storage space is set, and bulb and piston shoes inner wall contact surface are reduced, and generates sphere abrasion because piston shoes inner-wall material deforms to reduce.
When plunger ball 10 does spherical surface secondary motion in ball-and-socket 8, piston shoes bottom surface is bonded with swash plate, is had between oil film between the two Gap.With in cylinder body rotational movement process, plunger can constantly oil suction, pressure oil realize the fuel feeding of pump, plunger cavity d in the process Oil liquid can be entered in piston shoes ball-and-socket 8 through the aperture h of plunger ball 10, the reciprocal of plunger ball 10, rotary motion can make oil Liquid a part is stored in oil storage tank 5, and the oil liquid of another part drives into 8 inner wall drag reduction slot 6 of ball-and-socket, what drag reduction slot 6 stored Oil liquid mainly plays lubricating action, reduces the dry friction of plunger ball middle and upper part.If no 6 plunger ball of drag reduction slot and piston shoes withhold packet ball After can generate dry friction, generate clamping stagnation, keep bulb rotation not flexible.
Crumple groove, drag reduction slot reduce piston shoes quality simultaneously, the centrifugal force generated when reducing plunger piston slippery boots high-speed motion, Improve the robust motion of rotor assembly.
As shown in Figures 1 to 5, a kind of piston shoes, ball-and-socket inner wall is provided with drag reduction slot and crumple groove inside piston shoes, can effectively subtract The material deformation of small plunger bulb and piston shoes during withholding packet ball, increases plunger ball and piston shoes lubrication improves bulb rotation Flexibility ratio reduces the dry friction of bulb and piston shoes, improves the service life of plunger piston slippery boots assembly;Crumple groove, drag reduction slot reduce simultaneously Piston shoes quality, the centrifugal force generated when reducing plunger piston slippery boots high-speed motion improve the robust motion of rotor assembly.Piston shoes Inner wall includes crumple groove and drag reduction slot, and crumple groove reduces bulb and piston shoes inside contact surface for withholding in packet ball assembling process Product reduces the deformation of piston shoes contact surface material, adapts to the deformation that piston shoes surface is generated when withholding packet ball, reduces bulb abrasion;Subtract Resistance slot can be reduced clamping stagnation, abrasion, be improved plunger when doing spheric motion for storing a small amount of hydraulic oil, bulb with effectively lubricating The reliability of slippery boots assembly.
The plunger pump/motor piston shoes of the utility model, open up crumple groove and drag reduction slot on the ball-and-socket inner wall of piston shoes, can Bring it is following the utility model has the advantages that
(1) presence of crumple groove 7 can reduce the contact area for withholding plunger ball and piston shoes inner wall in packet ball technical process; To reduce the friction of plunger ball and piston shoes, improve service life;
(2) crumple groove 7, which can also reduce, withholds the material of bulb and piston shoes inner wall contact surface deformation in packet ball technical process, To reduce because rubbing caused by the rough material of contact surface;
(3) crumple groove 7 can effectively reduce wall friction in plunger ball and piston shoes, and that improves plunger piston slippery boots assembly uses the longevity Life;
(4) drag reduction slot 6 increases in bulb, top lubrication, reduces dry when plunger ball does spherical surface secondary motion in ball-and-socket Friction, effectively improves the rotation flexibility of plunger ball, prevents plunger ball from catching phenomenon occurs;
(5) plunger piston slippery boots assembly, which is tightly attached on swash plate, does high-speed motion, and the presence of crumple groove 7, drag reduction slot 6 reduces The quality of piston shoes 1 reduces the probability of plunger piston slippery boots flying disc, improves plunger to reduce the centrifugal force in motion process The robust motion of slippery boots assembly;
(6) crumple groove 7,6 composite structure of drag reduction slot group can reduce the friction of plunger ball contact surface and withhold packet ball technique The material of generation deforms, and increases bulb middle and upper part lubrication, improves plunger piston slippery boots assembly and rotates flexibility;
(7) crumple groove 7,6 composite structure of drag reduction slot group, can store the clast that generation is worn between plunger ball and piston shoes, prevent Only bulb and ball-and-socket generate adhesive wear.
(8) the processing is simple for drag reduction slot, crumple groove, it is easy to accomplish.
The utility model can be applied to crumple groove, drag reduction slot composite structure piston shoes or have similar bulb, ball-and-socket through buckleing The component of briquetting ball process Installation.
In the description of the present application, it is to be understood that term " center ", " longitudinal direction ", " transverse direction ", "front", "rear", The orientation or positional relationship of the instructions such as "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" is based on attached drawing institute The orientation or positional relationship shown is only the utility model and simplified description for ease of description, rather than indicates or imply meaning Device or element must have a particular orientation, construct and operate for specific orientation, thus should not be understood as practical new to this The limitation of type protection content.
The above is only the preferred embodiment of the utility model, it should be pointed out that: for the common skill of the art For art personnel, without departing from the principle of this utility model, several improvements and modifications can also be made, these improve and Retouching also should be regarded as the protection scope of the utility model.

Claims (10)

1. a kind of axial plunger pump or motor piston shoes, which is characterized in that including piston shoes ontology,
It is provided with ball-and-socket on the piston shoes ontology, drag reduction slot and crumple groove are offered on the ball-and-socket inner wall, the drag reduction slot is burst Contracting slot is connected with ball-and-socket respectively;
The drag reduction slot reduces the friction of plunger ball, piston shoes relative motion for storing lubricating oil;
The crumple groove provides storage location for the material to local deformation, reduces plunger ball and piston shoes inner wall contact surface, Sphere abrasion is generated because piston shoes contact surface material deforms to reduce;
The ball-and-socket includes the hemisphere portion of lower part and the cylindrical body portion on top, and the diameter in the hemisphere portion is equal to cylindrical body portion Diameter;The cylindrical body portion is connected with hemisphere portion;
The drag reduction slot is arranged in the hemisphere portion of the ball-and-socket or the junction in the hemisphere portion and cylindrical body portion is arranged in;
The cylindrical body portion of the ball-and-socket is arranged in the crumple groove.
2. axial plunger pump according to claim 1 or motor piston shoes, it is characterised in that: the drag reduction slot is cyclic annular recessed Slot.
3. axial plunger pump according to claim 2 or motor piston shoes, it is characterised in that: the drag reduction slot is along hemisphere The central axis of the annular recess of body portion circumference, the drag reduction slot is overlapped with the central axis of piston shoes ontology;
And/or the diameter range of the drag reduction slot is 1.006~1.01 times of diameter of hemisphere portion, width range is 0.5~ 1mm。
4. axial plunger pump according to claim 1 or motor piston shoes, it is characterised in that: the crumple groove is cyclic annular recessed Slot.
5. axial plunger pump according to claim 4 or motor piston shoes, it is characterised in that: the crumple groove is along cylinder The annular recess of body portion circumference;The central axis of the crumple groove is overlapped with the central axis of piston shoes ontology;
And/or the diameter range of the crumple groove is 1.003~1.006 times of the diameter in hemisphere portion, width range 0.6 ~1.2mm.
6. axial plunger pump according to claim 1 or motor piston shoes, it is characterised in that: the drag reduction slot, crumple groove It is the groove of annular setting;The width of the crumple groove is greater than the width of drag reduction slot, and the diameter of the crumple groove is less than drag reduction The diameter of slot;
The junction in the hemisphere portion and cylindrical body portion is arranged in the drag reduction slot;And the more than half spherical parts of center line of drag reduction slot The centre of sphere, the crumple groove is disposed adjacent with drag reduction slot, and is located above drag reduction slot.
7. axial plunger pump according to claim 6 or motor piston shoes, it is characterised in that: the drag reduction slot is inner end Face is the annular recess of bevel edge, and the bottom diameter of the drag reduction slot is greater than top end diameter;The bottom diameter of the drag reduction slot is half 1.0075~1.01 times of the diameter of spherical part;And the angle k of bevel edge and horizontal plane is 90 ° of 30 °≤k <.
8. axial plunger pump according to claim 6 or motor piston shoes, it is characterised in that: the crumple groove is inner end Face is the annular recess of bevel edge, and the bottom diameter of the crumple groove is greater than top end diameter;And the angle k of bevel edge and horizontal plane is 90 ° of 30 °≤k <.
9. axial plunger pump according to claim 1 or motor piston shoes, it is characterised in that: the piston shoes body bottom portion is set It is equipped with oil sump, oil duct is provided between the oil sump and ball-and-socket, oil sump is connected with ball-and-socket by oil duct;The oil duct includes cone Slot, oil-through-hole and oil storage tank;The cone slot setting is connected above oil sump, and with oil sump;The oil storage tank is arranged in ball-and-socket Lower section, and be connected with ball-and-socket;Described oil-through-hole one end is connected with cone slot, and the other end is connected with oil storage tank.
10. a kind of plunger piston slippery boots assembly, which is characterized in that including plunger body and the described in any item axial directions of claim 1-9 Plunger pump or motor piston shoes, plunger body end are provided with plunger ball, and the plunger ball is matched with the ball-and-socket of piston shoes.
CN201821960919.5U 2018-11-27 2018-11-27 A kind of axial plunger pump or motor piston shoes and plunger piston slippery boots assembly Active CN209569155U (en)

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CN201821960919.5U CN209569155U (en) 2018-11-27 2018-11-27 A kind of axial plunger pump or motor piston shoes and plunger piston slippery boots assembly

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Application Number Priority Date Filing Date Title
CN201821960919.5U CN209569155U (en) 2018-11-27 2018-11-27 A kind of axial plunger pump or motor piston shoes and plunger piston slippery boots assembly

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