CN114320808A - Sliding shoe with dynamic pressure effect - Google Patents
Sliding shoe with dynamic pressure effect Download PDFInfo
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- CN114320808A CN114320808A CN202111468832.2A CN202111468832A CN114320808A CN 114320808 A CN114320808 A CN 114320808A CN 202111468832 A CN202111468832 A CN 202111468832A CN 114320808 A CN114320808 A CN 114320808A
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- slipper
- working surface
- dynamic pressure
- swash plate
- oil
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- 230000000694 effects Effects 0.000 title claims abstract description 26
- 239000003921 oil Substances 0.000 claims 9
- 239000010720 hydraulic oil Substances 0.000 claims 1
- 238000013461 design Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 241000764238 Isis Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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Abstract
The invention discloses a slipper with dynamic pressure effect, which relates to the technical field of plunger pumps and comprises a slipper body, wherein the slipper body is provided with a first working surface, oil is arranged between the first working surface and a swash plate, the first working surface can generate relative motion with the swash plate and form an oil film, dynamic pressure acting on the first working surface can be formed by extruding the oil film when the first working surface and the swash plate move relatively, and the dynamic pressure has a component opposite to the motion direction of the slipper body. The slipper with the dynamic pressure effect provided by the invention has the advantages of high stability and reliability and long service life.
Description
Technical Field
The invention relates to the technical field of plunger pumps, in particular to a sliding shoe with a dynamic pressure effect.
Background
The sliding shoe is an important component of the plunger pump, and the structure of the sliding shoe directly influences the working performance of the plunger pump. Because the pair of friction pairs of the sliding shoe and the swash plate has larger contact area, the contact specific pressure is greatly reduced, and the pressure of the plunger pump can be further improved. The design of the sliding shoe is that residual pressing force is adopted, namely an oil film acts on the plunger to generate normal pressing force on the sliding shoe, so that the sliding shoe presses the surface of the swash plate; meanwhile, high-pressure oil in the plunger cavity enters between the sliding shoes and the swash plate through the through holes of the plungers and the through holes of the sliding shoes, a layer of oil film is formed between the sliding shoes and the swash plate, the oil film between the sliding shoes and the swash plate provides reverse thrust for the sliding shoes, and the sliding shoes are in a dynamic balance state under the action of pressing force and the reverse thrust. The contact surface of the traditional sliding shoe and the swash plate is a plane, when the sliding shoe works, the sliding shoe is subjected to driving force from a plunger and friction force from the swash plate, and the sliding shoe can generate moment for inclining the sliding shoe under the action of the driving force and the friction force, so that the sliding shoe is integrally inclined and rubbed with the swash plate, the stability and the reliability of the operation of the sliding shoe are seriously influenced, and the service life of a system is shortened.
Disclosure of Invention
The invention aims to provide a sliding shoe with a dynamic pressure effect, which solves the problems in the prior art and has high stability, reliability and long service life.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides a slipper with a dynamic pressure effect, which comprises a slipper body, wherein the slipper body is provided with a first working surface, oil is arranged between the first working surface and a swash plate, the first working surface and the swash plate can generate relative motion and form an oil film, the first working surface and the swash plate can form dynamic pressure acting on the first working surface by extruding the oil film when in relative motion, and the dynamic pressure has a component opposite to the motion direction of the slipper body.
Preferably, the first working surface is arranged on the outer edge of one end, close to the swash plate, of the slipper body, the first working surface is conical, and the small end and the large end of the first working surface are close to the swash plate and form an oil film with the swash plate.
Preferably, the slipper body is provided with an annular bulge, the annular bulge is arranged on the outer edge of one end, close to the swash plate, of the slipper body, and the first working surface is arranged at one end, close to the swash plate, of the annular bulge.
Preferably, the shoe body is capable of sliding relative to the swash plate by a driving force, and a frictional force acting on the shoe body is capable of being generated when the shoe body slides relative to the swash plate, and the shoe body is capable of balancing moment by the dynamic pressure, the driving force, and the frictional force.
Preferably, the included angle between the first working surface and a plane perpendicular to the central line of the slipper body is 3-5 degrees.
Preferably, the slipper body is provided with an oil through hole, and the oil through hole can supply oil to enter between the first working surface and the swash plate.
Preferably, a groove is formed in one end, far away from the first working surface, of the slipper body and communicated with the oil through hole, and the groove is used for being matched with a plunger ball head.
Preferably, the center lines of the shoe body, the oil passage hole, and the first working surface are collinear.
Compared with the prior art, the invention has the following technical effects:
the slipper with dynamic pressure effect provided by the invention can generate dynamic pressure acting on the first working surface when the first working surface and the swash plate move relatively, the dynamic pressure has a component opposite to the movement direction of the slipper body, the influence of the driving force applied to the slipper body and the moment generated by friction force and used for inclining the slipper body can be partially offset or completely eliminated, the stability and the reliability of the operation of the system are improved, and the service life of the system is prolonged.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic structural view (first direction) of a slipper with dynamic pressure effect according to the present invention;
FIG. 2 is a schematic structural view (second direction) of a slipper having a dynamic pressure effect according to the present invention;
FIG. 3 is a cross-sectional view of a slipper having a dynamic pressure effect provided by the present invention;
FIG. 4 is a force analysis diagram of a slipper with dynamic pressure effect provided by the present invention;
FIG. 5 is an enlarged view of A in FIG. 4;
FIG. 6 is a schematic view of the dynamic pressure related dimensions of the shoe with dynamic pressure effect provided by the present invention;
in the figure: 100-sliding shoe with dynamic pressure effect, 1-sliding shoe body, 2-first working surface, 3-swash plate, 4-annular bulge, 5-oil through hole, 6-groove, 7-plunger ball head and F1Dynamic pressure, F2 -driving force, f-friction.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a sliding shoe with a dynamic pressure effect, which solves the problems in the prior art and has high stability, reliability and long service life.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in FIGS. 1 to 6, the invention provides a slipper 100 with dynamic pressure effect, comprising a slipper body 1, wherein the slipper body 1 is provided with a first working surface 2, oil is arranged between the first working surface 2 and a swash plate 3, the first working surface 2 can generate relative motion with the swash plate 3 and form an oil film, and the first working surface 2 and the swash plate 3 can generate dynamic pressure acting on the first working surface 2 by squeezing the oil film to form a dynamic pressure acting on the first working surface 2 when in relative motion
Dynamic pressure
Having a component opposite to the direction of movement of the slipper body 1. Dynamic pressure
The moment acting on the sliding shoe body 1 can partially offset or completely eliminate the driving force applied to the sliding shoe body 1
And the moment which is generated by the friction force f and enables the sliding shoe body 1 to incline, so that the sliding shoe 100 with the dynamic pressure effect is formed, the stability and the reliability of the operation of the system are improved, and the service life of the system is prolonged.
The first working surface 2 is arranged on the outer edge of one end, close to the swash plate 3, of the slipper body 1, the first working surface 2 is conical, and the large end of the small end of the first working surface 2 is close to the swash plate 3 and forms an oil film with the swash plate 3. Simple structure and convenient processing.
The slipper body 1 is provided with an annular bulge 4, the annular bulge 4 is arranged on the outer edge of one end, close to the swash plate 3, of the slipper body 1, and a first working surface 2 is arranged at one end, close to the swash plate 3, of the annular bulge 4.
The sliding shoe body 1 can be driven by a driving force
Can slide relative to the swash plate 3, and when the slipper body 1 slides relative to the swash plate 3, a frictional force f acting on the slipper body 1 can be generated, and the slipper body 1 can be subjected to a dynamic pressure
Driving force
And the moment is balanced under the action of the friction force f. According to the dynamic pressure formula (from oil film theory and friction pair design of a hydraulic pump and a motor):
wherein p is the dynamic pressure applied to the slipper, mu is the friction coefficient, U is the sliding speed of the slipper body 1,
is the distance between the projections of the inner edge and the outer edge of the first working surface 2 on a plane perpendicular to the centerline of the slipper body 1,
is the radius of the inner edge of the first working surface 2,
the distance of the first running surface 2 from the swashplate 3,
the distance from the inner edge of the first working surface 2 to the swash plate 3, and h is the distance between the swash plate 3 and any point on the side surface of the first working surface 2 where the dynamic pressure P is generated.
Dynamic pressure
And = P × S, S is the area of the first working surface 2.
The included angle between the first working surface and a plane perpendicular to the central line of the slipper body is theta, cot theta =
I.e. dynamic pressure P and dynamic pressure to which the shoe body 1 is subjected
And the angle between the first working surface 2 and a plane perpendicular to the centre line of the slipper body 1. According to the using condition of the plunger pump, the optimal included angle can be obtained by adjusting the included angle between the first working surface 2 and the plane perpendicular to the central line of the slipper body 1 and adopting the modes of test verification, finite element analysis and the like, so that the slipper body 1 can be subjected to dynamic pressure
Driving force
With moment equilibrium under the action of frictional force f, i.e.
L = M, wherein M is driving force
A moment acting on the slipper body 1 with a frictional force f, L is
Is perpendicular to the point of application of the moment M on the slipper body 1.
Preferably, the angle between the first working surface 2 and a plane perpendicular to the centre line of the slipper body 1 is 3 ° to 5 °.
The slipper body 1 is provided with an oil through hole 5, and the oil through hole 5 can supply oil to enter between the first working surface 2 and the swash plate 3.
One end of the sliding shoe body 1, which is far away from the first working surface 2, is provided with a groove 6, the groove 6 is communicated with the oil through hole 5, and the groove 6 is used for being matched with a plunger ball head 7.
The central lines of the sliding shoe body 1, the oil through hole 5 and the first working surface 2 are collinear. Is beneficial to improving the uniformity of the oil film, thereby improving the stability of operation.
The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (8)
1. A slipper having a dynamic pressure effect, comprising: the hydraulic oil press comprises a slipper body, wherein the slipper body is provided with a first working surface, oil is arranged between the first working surface and a swash plate, the first working surface and the swash plate can generate relative motion and form an oil film, the first working surface and the swash plate can form dynamic pressure acting on the first working surface by extruding the oil film during the relative motion, and the dynamic pressure has a component opposite to the motion direction of the slipper body.
2. The slipper having a dynamic pressure effect of claim 1, wherein: the first working surface is arranged on the outer edge of one end, close to the swash plate, of the sliding shoe body, the first working surface is conical, and the small end and the large end of the first working surface are close to the swash plate and form an oil film with the swash plate.
3. The slipper having a dynamic pressure effect of claim 1, wherein: the slipper body is provided with an annular bulge, the annular bulge is arranged on the outer edge of one end, close to the swash plate, of the slipper body, and the first working face is arranged at one end, close to the swash plate, of the annular bulge.
4. The slipper having a dynamic pressure effect of claim 3, wherein: the slipper body can slide relative to the swash plate under the action of driving force, friction force acting on the slipper body can be generated when the slipper body slides relative to the swash plate, and the slipper body can balance moment under the action of the dynamic pressure, the driving force and the friction force.
5. The slipper having a dynamic pressure effect of claim 2, wherein: the included angle between the first working surface and a plane perpendicular to the central line of the slipper body is 3-5 degrees.
6. The slipper having a dynamic pressure effect of claim 1, wherein: the slipper body is provided with an oil through hole, and the oil through hole can supply oil to enter between the first working surface and the swash plate.
7. The slipper having a dynamic pressure effect of claim 6, wherein: one end of the sliding shoe body, which is far away from the first working surface, is provided with a groove, the groove is communicated with the oil through hole, and the groove is used for being matched with a plunger ball head.
8. The slipper having a dynamic pressure effect of claim 6, wherein: the central lines of the sliding shoe body, the oil through hole and the first working surface are collinear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111468832.2A CN114320808A (en) | 2021-12-04 | 2021-12-04 | Sliding shoe with dynamic pressure effect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111468832.2A CN114320808A (en) | 2021-12-04 | 2021-12-04 | Sliding shoe with dynamic pressure effect |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114320808A true CN114320808A (en) | 2022-04-12 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111468832.2A Pending CN114320808A (en) | 2021-12-04 | 2021-12-04 | Sliding shoe with dynamic pressure effect |
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| Country | Link |
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| CN (1) | CN114320808A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05126030A (en) * | 1991-11-05 | 1993-05-21 | Komatsu Ltd | Swash plate supporting structure of swash plate type variable piston pump motor |
| DE102007055167A1 (en) * | 2007-11-19 | 2009-05-20 | Linde Material Handling Gmbh | Piston-slide shoe fixture for swash plate machine in hydraulic engine, has supporting surface e.g. spherical support bar, for supporting ball of ball joint and arranged within radially internal area of ball joint |
| CN102588265A (en) * | 2012-03-02 | 2012-07-18 | 张意 | Novel high-pressure piston variable pump |
| CN104806464A (en) * | 2015-02-16 | 2015-07-29 | 清华大学 | Aviation axial plunger hydraulic pump and slipping boot thereof |
| CN109340070A (en) * | 2018-11-13 | 2019-02-15 | 辽宁工程技术大学 | A kind of return mechanism of axial plunger hydraulic pump |
| CN210127929U (en) * | 2019-03-25 | 2020-03-06 | 西迪技术股份有限公司 | Piston shoe for plunger pump and plunger type hydraulic pump |
| CN110925159A (en) * | 2019-12-02 | 2020-03-27 | 哈尔滨工程大学 | Axial plunger pump piston shoe of groove structure |
| CN111237151A (en) * | 2020-03-21 | 2020-06-05 | 哈尔滨工程大学 | Axial plunger pump sliding shoe with surface texture |
| CN113389700A (en) * | 2021-07-22 | 2021-09-14 | 厦门大学 | Multi-channel drainage multi-oil-chamber eccentric wear resistant axial plunger pump sliding shoe |
-
2021
- 2021-12-04 CN CN202111468832.2A patent/CN114320808A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05126030A (en) * | 1991-11-05 | 1993-05-21 | Komatsu Ltd | Swash plate supporting structure of swash plate type variable piston pump motor |
| DE102007055167A1 (en) * | 2007-11-19 | 2009-05-20 | Linde Material Handling Gmbh | Piston-slide shoe fixture for swash plate machine in hydraulic engine, has supporting surface e.g. spherical support bar, for supporting ball of ball joint and arranged within radially internal area of ball joint |
| CN102588265A (en) * | 2012-03-02 | 2012-07-18 | 张意 | Novel high-pressure piston variable pump |
| CN104806464A (en) * | 2015-02-16 | 2015-07-29 | 清华大学 | Aviation axial plunger hydraulic pump and slipping boot thereof |
| CN109340070A (en) * | 2018-11-13 | 2019-02-15 | 辽宁工程技术大学 | A kind of return mechanism of axial plunger hydraulic pump |
| CN210127929U (en) * | 2019-03-25 | 2020-03-06 | 西迪技术股份有限公司 | Piston shoe for plunger pump and plunger type hydraulic pump |
| CN110925159A (en) * | 2019-12-02 | 2020-03-27 | 哈尔滨工程大学 | Axial plunger pump piston shoe of groove structure |
| CN111237151A (en) * | 2020-03-21 | 2020-06-05 | 哈尔滨工程大学 | Axial plunger pump sliding shoe with surface texture |
| CN113389700A (en) * | 2021-07-22 | 2021-09-14 | 厦门大学 | Multi-channel drainage multi-oil-chamber eccentric wear resistant axial plunger pump sliding shoe |
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