CN110925159B - Axial plunger pump piston shoe of groove structure - Google Patents
Axial plunger pump piston shoe of groove structure Download PDFInfo
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- CN110925159B CN110925159B CN201911212708.2A CN201911212708A CN110925159B CN 110925159 B CN110925159 B CN 110925159B CN 201911212708 A CN201911212708 A CN 201911212708A CN 110925159 B CN110925159 B CN 110925159B
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- sliding shoe
- annular groove
- oil chamber
- end surface
- piston shoe
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F04B1/122—Details or component parts, e.g. valves, sealings or lubrication means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/18—Lubricating
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
Abstract
The invention provides an axial plunger pump sliding shoe with a groove structure, which comprises a sliding shoe body, wherein the sliding shoe body is provided with an upper end surface and a lower end surface which are opposite, the upper end surface is provided with a sliding shoe ball socket, the lower end surface is provided with an oil chamber, the oil chamber is positioned in the center of the lower end surface, and the ball socket is communicated with the oil chamber through an oil through hole; an annular groove is formed in the lower end face of the sliding shoe body, the annular groove is close to the oil chamber, and a sealing belt is arranged between the annular groove and the outermost ring of the lower end face of the sliding shoe. According to the invention, the annular groove is processed on the bottom surface of the sliding shoe, so that the oil film bearing capacity at the sliding shoe friction pair can be improved, the viscous friction force and the friction torque are reduced, the mechanical loss is reduced, the dynamic pressure lubrication effect is enhanced, and the method has important significance for reducing the abrasion and prolonging the service life of the sliding shoe friction pair.
Description
Technical Field
The invention relates to a part of an axial plunger pump, in particular to an axial plunger pump sliding shoe with a groove structure, and belongs to the field of engineering machinery.
Background
Because the axial plunger pump has the advantages of high working pressure, easy variable adjustment, large rotating speed range, high efficiency and the like, the axial plunger pump is widely applied to the fields of ship industry, aerospace, machine tool industry, energy industry machinery, light textile machinery and the like, and the problems of friction reduction and service life extension of the pump are very urgent along with the development of the high-pressure plunger pump towards high pressure, high speed and large flow.
The slipper friction pair composed of the slipper and the swash plate is one of three large friction pairs of the axial plunger pump. In the working process, the movement form of the sliding shoes comprises axial movement along with the plunger and circumferential movement clinging to the surface of the swash plate, the sliding shoes incline under the action of overturning moment to form a wedge-shaped oil film with the swash plate, and the bearing capacity of the sliding shoes comprises two parts, namely static pressure supporting force generated by high-pressure oil and a hydrodynamic pressure field generated in the movement process of the sliding shoes. For the wedge-shaped flow field, the oil film generated by the fluid dynamic and static pressure mixed support has more complex characteristics, and the sliding shoe is easy to generate friction and wear.
The sliding shoes have high moving speed and are frequently subjected to periodic pressure impact and high contact specific pressure, so that the sliding shoe friction pair is easy to cause lubrication failure, serious abrasion and even burning loss of the sliding shoes. In addition, the working environment of the high-pressure plunger pump is severe and is in working conditions of high speed, high pressure, high temperature and the like for a long time, so that the lubricating state of the sliding shoe friction pair becomes very severe, for example, the overturning motion of the sliding shoe influences the stability of oil film bearing of the sliding shoe friction pair, and the sliding shoe is worn and loses efficacy; the relative movement speed between the sliding shoe and the swash plate is high, a large amount of friction heat is easy to generate, the power loss of the pump is increased, the temperature of an oil film is increased, the viscosity of the oil film is reduced, and the lubricating performance of the sliding shoe friction pair is reduced. Therefore, the improvement of the dynamic pressure lubrication performance of the sliding shoe friction pair has important significance.
Experts at home and abroad have long studied the inherent problems of the axial plunger pump, and most of the research focuses on seeking anti-wear and self-lubricating materials. The research on materials is relatively complete from the current research and engineering practice, and breakthrough progress cannot be achieved in a short time. Therefore, reasonable structural design must be adopted to improve the working performance of the sliding shoe friction pair.
Disclosure of Invention
The invention aims to solve the problems of a sliding shoe friction pair to a certain extent and provides an axial plunger pump sliding shoe with a groove structure. The invention is based on a static pressure bearing design method, and the lower end surface of a sliding shoe friction pair of an axial plunger pump is processed into a surface with an annular groove structure.
The purpose of the invention is realized as follows: the hydraulic sliding shoe comprises a sliding shoe body, wherein a sliding shoe ball socket is arranged on the upper end face of the sliding shoe body, an oil chamber is arranged on the lower end face of the sliding shoe body, the oil chamber is communicated with the sliding shoe ball socket through an oil through hole, an annular groove is further formed in the lower end face of the sliding shoe body beside the oil chamber, and the annular groove and the oil chamber form a stepped surface.
The invention also includes such structural features:
1. the width w of the annular groove is between 2.0 mm and 3.0mm, and the depth h is between 5 μm and 20 μm.
2. And a sealing belt is arranged from the end part of the annular groove to the outermost ring of the slipper body.
Compared with the prior art, the invention has the beneficial effects that: according to the static pressure bearing design method, the lower end face of the axial plunger pump is designed to be provided with the surface of the annular groove, the annular groove and the oil chamber form a step plane, and the knowledge of hydrodynamics shows that the step plane has stronger dynamic pressure capacity compared with planes in other shapes; under the action of the step effect, the anti-overturning moment generated by an oil film pressure field can be better ensured, and the working reliability of the sliding shoe is enhanced. Compared with the sliding shoe without the annular groove, the sliding shoe with the annular groove has the same posture, because the annular groove increases the gap liquid resistance, the radial flow of the bottom oil chamber along the sealing belt is reduced, the pressure of the oil chamber is improved to a certain degree, namely the static pressure supporting force is increased, and the sliding shoe with the annular groove can well meet the design requirement of dynamic pressure lubrication of the sliding shoe.
The invention improves the dynamic pressure lubrication performance of the sliding shoe friction pair only through the structural design without adding parts, and has the advantages of simple structure and good economical efficiency. In addition, this structure still has extensive applicability's characteristics, can choose for use the annular slot of equidimension not to the operating mode of difference to guarantee that the piston shoes have excellent working property.
Drawings
FIG. 1 is a cross-sectional view of the present invention;
FIG. 2 is a bottom view of FIG. 1;
fig. 3 is an assembly view of the present invention.
In the figure: 1-a slipper body; 2-a slipper socket; 3-oil chamber; 4-oil through holes; 5-an annular groove; 6-sealing tape; 7-a plunger; 8-a swash plate; 9-cylinder bore; 10-plunger ball head.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
With reference to fig. 1 to 3, the invention provides an axial plunger pump piston shoe with a groove structure, which comprises a piston shoe body 1, wherein the piston shoe body 1 is provided with an upper end surface and a lower end surface which are opposite, the upper end surface is provided with a piston shoe ball socket 2, the lower end surface is provided with an oil chamber 3, the oil chamber 3 is positioned in the center of the lower end surface, the ball socket 2 is communicated with the oil chamber through an oil through hole 4, and the lower end surface of the piston shoe body is provided with an annular groove 5; the annular groove 5 is arranged close to the oil chamber 3, and a sealing belt 6 is arranged between the annular groove 5 and the outermost ring of the lower end face of the sliding shoe.
The axial plunger pump sliding shoe with the groove structure is characterized in that the width w of the annular groove 5 is 2.0-3.0 mm, and the depth h is 5-20 mu m.
Fig. 3 is an assembled state view of the present invention. During the use process of the piston shoes, a plunger ball head 10 is assembled with a ball socket 2 of a piston shoe body, a plunger 7 is installed in a cylinder hole 9, meanwhile, the piston shoe body is installed on a swash plate 8, in the working process, the high-pressure oil acting force born by the plunger is transmitted to the swash plate through the piston shoes, and the plunger 7 reciprocates in the cylinder hole 9 under the reaction force of the swash plate 8 to the piston shoe body 1. Because the annular groove is processed on the lower end face of the sliding shoe, the oil film bearing capacity can be improved, the viscous friction force and the friction torque can be reduced, the mechanical loss can be reduced, and the dynamic pressure lubrication effect can be enhanced.
In summary, the invention relates to an axial plunger pump piston shoe with a groove structure, which comprises a piston shoe body, wherein the piston shoe body is provided with an upper end surface and a lower end surface which are opposite, the upper end surface is provided with a piston shoe ball socket, the lower end surface is provided with an oil chamber, the oil chamber is positioned in the center of the lower end surface, and the ball socket is communicated with the oil chamber through an oil through hole; an annular groove is formed in the lower end face of the sliding shoe body, the annular groove is close to the oil chamber, and a sealing belt is arranged between the annular groove and the outermost ring of the lower end face of the sliding shoe. According to the invention, the annular groove is processed on the bottom surface of the sliding shoe, so that the oil film bearing capacity at the sliding shoe friction pair can be improved, the viscous friction force and the friction torque are reduced, the mechanical loss is reduced, the dynamic pressure lubrication effect is enhanced, and the method has important significance for reducing the abrasion and prolonging the service life of the sliding shoe friction pair.
Claims (2)
1. The utility model provides an axial plunger pump piston shoe of groove structure which characterized in that: the piston shoe comprises a piston shoe body, wherein a piston shoe ball socket is arranged on the upper end surface of the piston shoe body, an oil chamber is arranged on the lower end surface of the piston shoe body, the oil chamber is communicated with the piston shoe ball socket through an oil through hole, an annular groove is further arranged on the lower end surface of the piston shoe body beside the oil chamber, and the annular groove and the oil chamber form a stepped surface; a sealing belt is arranged from the end part of the annular groove to the outermost ring of the sliding shoe body; during use, a plunger ball head is assembled with a ball socket of the slipper body, the plunger is arranged in a cylinder hole, and the slipper body is arranged on the swash plate; because the lower end face of the sliding shoe is provided with the annular groove, the oil film bearing capacity can be improved, the viscous friction force and the friction torque can be reduced, the mechanical loss can be reduced, and the dynamic pressure lubrication effect can be enhanced.
2. A channel structured axial plunger pump shoe as set forth in claim 1, wherein: the width w of the annular groove is between 2.0 mm and 3.0mm, and the depth h is between 5 μm and 20 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911212708.2A CN110925159B (en) | 2019-12-02 | 2019-12-02 | Axial plunger pump piston shoe of groove structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911212708.2A CN110925159B (en) | 2019-12-02 | 2019-12-02 | Axial plunger pump piston shoe of groove structure |
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| Publication Number | Publication Date |
|---|---|
| CN110925159A CN110925159A (en) | 2020-03-27 |
| CN110925159B true CN110925159B (en) | 2021-09-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911212708.2A Active CN110925159B (en) | 2019-12-02 | 2019-12-02 | Axial plunger pump piston shoe of groove structure |
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| CN (1) | CN110925159B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113389700B (en) * | 2021-07-22 | 2022-03-15 | 厦门大学 | Multi-channel drainage multi-oil-chamber eccentric wear resistant axial plunger pump sliding shoe |
| CN114320808A (en) * | 2021-12-04 | 2022-04-12 | 中铁工程装备集团有限公司 | Sliding shoe with dynamic pressure effect |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201874805U (en) * | 2010-12-07 | 2011-06-22 | 淮海工学院 | Piston-shoe for swashplate axial piston pumps |
| CN202971162U (en) * | 2012-12-12 | 2013-06-05 | 无锡市汉力士液压泵制品有限公司 | Sliding-boot type plunger used for hydraulic plunger pump |
| CN204212965U (en) * | 2014-11-05 | 2015-03-18 | 淮北浩丰建材科技有限公司 | A kind of axial piston pump piston shoes |
| DE102015223218A1 (en) * | 2015-11-24 | 2017-05-24 | Robert Bosch Gmbh | Swash plate machine |
| CN109236596B (en) * | 2018-09-21 | 2020-02-18 | 合肥工业大学 | Swash plate type hydraulic axial plunger pump/motor heavy-load slipper pair antifriction disc |
| CN209671152U (en) * | 2019-03-13 | 2019-11-22 | 浙江赛克思液压有限公司 | A kind of axial piston motor Novel plunger piston shoes |
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| CN110925159A (en) | 2020-03-27 |
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