CN114320805A - Plunger structure of axial hydraulic pump and axial hydraulic pump comprising same - Google Patents
Plunger structure of axial hydraulic pump and axial hydraulic pump comprising same Download PDFInfo
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- CN114320805A CN114320805A CN202111572800.7A CN202111572800A CN114320805A CN 114320805 A CN114320805 A CN 114320805A CN 202111572800 A CN202111572800 A CN 202111572800A CN 114320805 A CN114320805 A CN 114320805A
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- plunger
- hydraulic pump
- axial hydraulic
- body structure
- axial
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Abstract
The invention relates to a plunger structure of an axial hydraulic pump and the axial hydraulic pump comprising the same, wherein the plunger structure of the axial hydraulic pump comprises: the plunger comprises a plunger body and a plunger ball head; the plunger ball head is connected to one end of the plunger body; the plunger body comprises a plurality of body structures which are connected in sequence, so that the plunger body is of a multi-section structure. According to the invention, the plunger body of the plunger structure of the axial hydraulic pump is set to be a sectional structure, so that the influence of the pressure change of the output fluid of the axial hydraulic pump on the deformation of the plunger can be effectively improved, and the pressure grade of the axial hydraulic pump is improved, thereby achieving the purpose of high pressure; by adopting the segmented plunger, the whole structure can be more compact under the condition of increasing the pressure without changing the material of the plunger of the axial hydraulic pump, and the working range of the axial hydraulic pump can be greatly increased due to the improvement of the bearing pressure.
Description
Technical Field
The invention relates to the technical field of axial hydraulic pumps, in particular to a plunger structure of an axial hydraulic pump and the axial hydraulic pump comprising the same.
Background
As shown in fig. 1, the axial hydraulic pump is mainly composed of a transmission shaft 1, a housing 2, a swash plate 3, a plunger structure 4, a cylinder block 5, a bearing 6, a bearing 7, a spherical hinge 8, a port plate 9, a rear cover 10 and the like. The plunger structures 4 are uniformly distributed in the cylinder body along the circumference, an inclination angle gamma is formed between the axes of the swash plate 3 and the cylinder body 5, the plunger structures 4 are tightly pressed on the swash plate 3, the valve plate 9 is fixed and does not rotate, the transmission shaft 1 penetrates through the swash plate 3 and the cylinder body 5, two ends of the transmission shaft are supported on the shell through the bearings 6 and the bearings 7, and the cylinder body 5 is connected with the transmission shaft 1 through a spline. When the prime motor drives the cylinder body 5 to rotate through the transmission shaft 1, the plunger structure 4 is forced to do reciprocating motion in the cylinder body 5 under the action of the swash plate 3, and oil absorption and oil pressing are carried out through the oil absorption window and the oil pressing window of the port plate 9. At present, when the axial hydraulic pump works actually, due to the structure, materials and the like, the running pressure of the axial hydraulic pump is prevented from being improved, and the service life of the axial hydraulic pump can be damaged due to long-term high pressure.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a plunger structure of an axial hydraulic pump and an axial hydraulic pump comprising the same, so as to solve the problem that the plunger cannot bear high pressure for a long time due to the reasons of structure, materials and the like in the prior art.
In order to solve or to improve the technical problem to some extent, according to an aspect of the present invention, there is provided a plunger structure of an axial hydraulic pump, including: the plunger comprises a plunger body and a plunger ball head;
the plunger ball head is connected to one end of the plunger body;
the plunger body comprises a plurality of body structures which are sequentially connected, so that the plunger body is of a multi-section structure.
In some embodiments, the plunger ball and the plurality of body structures are each provided with a central hole, and when the plurality of body structures are connected in sequence, the plurality of central holes are communicated.
In some embodiments, a plurality of the body structures have the same diameter.
In some embodiments, a plurality of said body structures are arranged in a coaxial connection.
In some embodiments, the plunger body comprises a first body structure and a second body structure;
one end of the first body structure is connected to the plunger ball head, and the other end of the first body structure is provided with a groove;
one end of the second body structure is provided with a bulge matched with the groove, and the bulge extends into the groove to connect the first body structure with the second body structure.
In some embodiments, the recess is a spherical recess and the protrusion is a spherical protrusion such that the second body structure is hingedly connected to the first body structure.
In some embodiments, the recess is a cylindrical recess and the protrusion is a cylindrical protrusion such that the second body structure is plugged into the first body structure.
In some embodiments, the recess is a polyhedral recess and the protrusion is a polyhedral protrusion, so that the second body structure is plugged into the first body structure.
In some embodiments, a retaining mechanism is disposed within the recess.
According to another aspect of the present invention, there is provided an axial hydraulic pump comprising a plunger structure of any one of the axial hydraulic pumps described above, the plunger structure being disposed within a cylinder of the axial hydraulic pump, only one of the body structures extending outside the cylinder during operation of the axial hydraulic pump.
Compared with the prior art, the invention has obvious advantages and beneficial effects. By means of the technical scheme, the plunger structure of the axial hydraulic pump and the axial hydraulic pump with the plunger structure can achieve considerable technical progress and practicability, have industrial wide utilization value and at least have the following advantages:
according to the invention, the plunger body of the plunger structure of the axial hydraulic pump is set to be a sectional structure, so that the influence of the pressure change of the output fluid of the axial hydraulic pump on the deformation of the plunger can be effectively improved, and the pressure grade of the axial hydraulic pump is improved, thereby achieving the purpose of high pressure; by adopting the sectional plunger structure, the whole structure is more compact under the condition of increasing the pressure without changing the material of the plunger structure of the axial hydraulic pump, and the working range of the axial hydraulic pump can be greatly increased by improving the bearing pressure.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented in accordance with the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the following preferred embodiments are described in detail with reference to the accompanying drawings.
Drawings
FIG. 1 shows a schematic cross-sectional view of an axial hydraulic pump;
fig. 2 is a schematic cross-sectional view showing a plunger structure of an axial hydraulic pump according to an embodiment of the present invention;
fig. 3 is a schematic sectional view showing a plunger structure of an axial hydraulic pump according to another embodiment of the present invention.
[ notation ] to show
1: a drive shaft;
2: a housing;
3: a swash plate;
4: a plunger structure;
41: a plunger ball head;
42: a plunger body;
421: a first body structure;
4211: groove
422: a second body structure;
4221: a protrusion;
43: a central bore;
44: an anti-drop mechanism;
5: a cylinder body;
6: a bearing;
7: a bearing;
8: spherical hinge;
9: a valve plate;
10: and (7) a rear cover.
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description will be given to a plunger structure of an axial hydraulic pump and an axial hydraulic pump having the same according to the present invention, and the effects thereof, with reference to the accompanying drawings and preferred embodiments.
The embodiment of the invention provides a plunger structure of an axial hydraulic pump. As shown in fig. 1 and 2, comprises a plunger ball 41 and a plunger body 42.
The plunger ball 41 is connected to one end of the plunger body 42, the plunger structure 4 is hinged in the swash plate 3 through the plunger ball 41, the plunger body 42 extends into the accommodating space formed by the cylinder block 5, and the plunger body 42 is driven to reciprocate along the radial direction of the accommodating space of the cylinder block 5 in the rotating process of the swash plate 3. So as to realize the operation process of oil absorption and oil pressing.
In the operation process of axial hydraulic pump, plunger structure 4 can bear great pressure, because reasons such as the material of plunger structure 4, structure, plunger structure 4 can lead to plunger structure 4's life to shorten greatly under the highly compressed effect of long term stand to cause the unable further promotion of operating pressure of axial hydraulic pump, restricted the promotion of axial hydraulic pump's performance.
In view of the above situation, the plunger body 42 is configured as a multi-section structure, that is, the plunger body 42 includes a plurality of body structures, and the body structures are connected in sequence to form the plunger body 42. The connection of the plurality of body structures may be by way of hinge, plug, etc., and the invention is not limited thereto.
In one embodiment, a central bore 43 is provided within the plunger ball 41 and the plurality of body structures, and the plurality of central bores 43 communicate when the plunger ball 41 and the plurality of body structures are connected in series.
During the operation of the axial hydraulic pump, part of the oil entering the cylinder 5 is guided to the slipper end face of the axial hydraulic pump through the central hole 43, so that an oil film is formed between the slipper end face and the swash plate 3, and the abrasion to the slipper end face and the swash plate 3 is reduced.
In an embodiment, in order to ensure that the plunger structures 4 reciprocate in the cylinder 5 under the driving of the swash plate 3 in the operation process of the axial hydraulic pump, the force-bearing directions of the body structures are the same, the body structures are coaxially connected, and the reciprocating motion of the plunger structures 4 can be stably carried out under the driving of the swash plate 3.
In an embodiment, in the operation process of the axial hydraulic pump, the plunger structure 4 reciprocates in the cylinder 5 under the driving of the swash plate 3, if the diameters of the body structures are different, the plunger structure 4 cannot be completely and tightly attached to the inner side wall of the cylinder 5, and then the oil can flow out of the cylinder 5 through a gap between the plunger structure 4 and the inner side wall of the cylinder 5 in the oil pressing process, so that the oil inside the cylinder 5 cannot be completely pressed out. Therefore, the plurality of body structures are set to have the same diameter, so as to ensure the close fit between the plunger body 42 and the inner side wall of the cylinder 5.
In one embodiment, as shown in fig. 2 and 3, the plunger body 42 has two body structures, including a first body structure 421 and a second body structure 422. One end of the first body structure 421 is connected to the plunger ball 41, and the other end of the first body structure 421 is connected to the second body structure 422.
Specifically, a groove 4211 is disposed at the other end of the first body structure 421, and a protrusion 4221 matched with the groove 4211 of the first body structure 421 is disposed at one end of the second body structure 422. The protrusions 4221 of the second body structure 422 are inserted into the grooves 4211 of the first body structure 421, so as to connect the first body structure 421 and the second body structure 422.
The first body structure 421 and the second body structure 422 may be connected in a hinged manner, or in an insertion manner.
Of course, it is also possible to arrange the body structure in three, four, etc. The number of the body structures is not limited in the present invention.
In one embodiment, as shown in FIG. 2, the indentation 4211 disposed at the other end of the first body structure 421 is a spherical indentation 4211, and the protrusion 4221 disposed at one end of the second body structure 422 is a spherical protrusion 4221. When the spherical protrusions 4221 of the second body structure 422 extend into the spherical grooves 4211 of the first body structure 421, the first body structure 421 is hinged to the second body structure 422.
In another embodiment, as shown in FIG. 3, the indentation 4211 disposed at the other end of the first body structure 421 is a cylindrical indentation 4211, and the protrusion 4221 disposed at one end of the second body structure 422 is a cylindrical protrusion 4221. When the cylindrical protrusion 4221 of the second body structure 422 extends into the cylindrical groove 4211 of the first body structure 421, the first body structure 421 is inserted into the second body structure 422.
Of course, the concave grooves 4211 of the first body structure 421 can also be configured as polyhedral concave grooves 4211, and the corresponding convex protrusions 4221 of the second body structure 422 can be configured as polyhedral convex protrusions 4221. The polyhedron may be in the shape of a cube, a cuboid, etc., and the present invention is not limited thereto.
As shown in fig. 3, when the first body structure 421 and the second body structure 422 are connected by plugging, in order to prevent the protrusion 4221 of the second body structure 422 from falling out of the groove 4211 of the first body structure 421, the anti-falling mechanism 44 is further disposed in the groove 4211 of the first body structure 421.
In an embodiment, an opening structure (not shown) is respectively disposed on an inner sidewall of the groove 4211 of the first body structure 421 and a sidewall of the protrusion 4221 of the second body structure 422, and the two opening structures are combined to form an accommodating space. A plurality of the accommodating spaces are disposed along the inner sidewalls of the groove 4211 of the first body structure 421 and the sidewalls of the protrusion 4221 of the second body structure 422, and an anti-dropping block (not shown) is disposed in each of the accommodating spaces. Thereby forming the anti-drop mechanism 44 similar to the mortise and tenon structure.
Of course, the anti-slip mechanism 44 may be provided in other forms, and the invention is not limited thereto.
The embodiment of the invention also provides an axial hydraulic pump, which comprises the plunger structure 4 of any one of the embodiments, wherein the plunger ball 41 of the plunger structure 4 is hinged on the swash plate 3, and the plunger body of the plunger structure 4 extends into the accommodating space of the cylinder 5. During operation of the axial hydraulic pump, the plunger body reciprocates along the receiving space of the cylinder 5, and during the reciprocating motion, only one body structure protrudes out of the receiving space of the cylinder 5, for example, only a portion of the first body structure 421 protrudes out of the receiving space of the cylinder 5.
According to the plunger structure of the axial hydraulic pump and the axial hydraulic pump comprising the same, the plunger body of the plunger structure of the axial hydraulic pump is of a sectional structure, so that the influence of the pressure change of output fluid of the axial hydraulic pump on the deformation of the plunger can be effectively improved, and the pressure grade of the axial hydraulic pump is improved, so that the aim of high pressure is fulfilled; by adopting the segmented plunger, the whole structure can be more compact under the condition of increasing the pressure without changing the material of the plunger of the axial hydraulic pump, and the working range of the axial hydraulic pump can be greatly increased due to the improvement of the bearing pressure.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A plunger structure of an axial hydraulic pump, comprising: the plunger comprises a plunger body and a plunger ball head;
the plunger ball head is connected to one end of the plunger body;
the plunger body comprises a plurality of body structures which are sequentially connected, so that the plunger body is of a multi-section structure.
2. The plunger structure of an axial hydraulic pump according to claim 1, wherein the plunger bulb and a plurality of the body structures are each provided with a central hole therein, and when the plurality of body structures are connected in sequence, the plurality of central holes communicate.
3. Plunger structure of an axial hydraulic pump according to claim 1, characterized in that a plurality of said body structures are arranged in coaxial connection.
4. The plunger structure of an axial hydraulic pump of claim 1, wherein a plurality of the body structures are the same diameter.
5. The plunger structure of an axial hydraulic pump according to any one of claims 1-4, wherein the plunger body comprises a first body structure and a second body structure;
one end of the first body structure is connected to the plunger ball head, and the other end of the first body structure is provided with a groove;
one end of the second body structure is provided with a bulge matched with the groove, and the bulge extends into the groove to connect the first body structure with the second body structure.
6. The plunger structure of an axial hydraulic pump of claim 5, wherein the recess is a spherical recess and the protrusion is a spherical protrusion such that the second body structure is hingedly connected to the first body structure.
7. The plunger structure of an axial hydraulic pump of claim 5, wherein the recess is a cylindrical recess and the projection is a cylindrical projection such that the second body structure is inserted into the first body structure.
8. The plunger structure of an axial hydraulic pump of claim 5, wherein the recess is a polyhedral recess and the protrusion is a polyhedral protrusion such that the second body structure is plugged into the first body structure.
9. The plunger structure of an axial hydraulic pump according to claim 7 or 8, wherein an anti-drop mechanism is provided in the groove.
10. An axial hydraulic pump comprising a plunger structure of an axial hydraulic pump according to any one of claims 1-9, the plunger structure being arranged in a cylinder of the axial hydraulic pump, only one of the body structures extending outside the cylinder during operation of the axial hydraulic pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111572800.7A CN114320805A (en) | 2021-12-21 | 2021-12-21 | Plunger structure of axial hydraulic pump and axial hydraulic pump comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111572800.7A CN114320805A (en) | 2021-12-21 | 2021-12-21 | Plunger structure of axial hydraulic pump and axial hydraulic pump comprising same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114320805A true CN114320805A (en) | 2022-04-12 |
Family
ID=81055528
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111572800.7A Pending CN114320805A (en) | 2021-12-21 | 2021-12-21 | Plunger structure of axial hydraulic pump and axial hydraulic pump comprising same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114320805A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3873240A (en) * | 1972-06-16 | 1975-03-25 | Gerard Leduc | Hydraulic swash plate pump |
| JPH0444483U (en) * | 1990-08-20 | 1992-04-15 | ||
| JP2002195161A (en) * | 2000-12-22 | 2002-07-10 | Sakura Seisakusho:Kk | Pump structure |
| EP1517039A1 (en) * | 2003-09-22 | 2005-03-23 | Delphi Technologies, Inc. | Pump assembly |
| CN102720648A (en) * | 2012-05-29 | 2012-10-10 | 华中科技大学 | Full depth buoyancy regulating seawater pump |
| CN103982416A (en) * | 2014-05-29 | 2014-08-13 | 徐州徐工液压件有限公司 | Plunger component and sleeving type closed hollow plunger |
| CN207879592U (en) * | 2018-02-10 | 2018-09-18 | 浙江大农机器有限公司 | high pressure reciprocating plunger pump structure |
| CN108561306A (en) * | 2018-03-07 | 2018-09-21 | 宁波合力机泵股份有限公司 | A kind of Double-powering balances the fluid end of import high pressure entirely |
| CN212672045U (en) * | 2020-05-06 | 2021-03-09 | 鑫洁宝机械科技(无锡)有限公司 | High-strength sleeved plunger for high-pressure pump |
| CN217002174U (en) * | 2021-12-21 | 2022-07-19 | 北京华德液压工业集团有限责任公司 | Plunger structure of axial hydraulic pump and axial hydraulic pump comprising same |
-
2021
- 2021-12-21 CN CN202111572800.7A patent/CN114320805A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3873240A (en) * | 1972-06-16 | 1975-03-25 | Gerard Leduc | Hydraulic swash plate pump |
| JPH0444483U (en) * | 1990-08-20 | 1992-04-15 | ||
| JP2002195161A (en) * | 2000-12-22 | 2002-07-10 | Sakura Seisakusho:Kk | Pump structure |
| EP1517039A1 (en) * | 2003-09-22 | 2005-03-23 | Delphi Technologies, Inc. | Pump assembly |
| CN102720648A (en) * | 2012-05-29 | 2012-10-10 | 华中科技大学 | Full depth buoyancy regulating seawater pump |
| CN103982416A (en) * | 2014-05-29 | 2014-08-13 | 徐州徐工液压件有限公司 | Plunger component and sleeving type closed hollow plunger |
| CN207879592U (en) * | 2018-02-10 | 2018-09-18 | 浙江大农机器有限公司 | high pressure reciprocating plunger pump structure |
| CN108561306A (en) * | 2018-03-07 | 2018-09-21 | 宁波合力机泵股份有限公司 | A kind of Double-powering balances the fluid end of import high pressure entirely |
| CN212672045U (en) * | 2020-05-06 | 2021-03-09 | 鑫洁宝机械科技(无锡)有限公司 | High-strength sleeved plunger for high-pressure pump |
| CN217002174U (en) * | 2021-12-21 | 2022-07-19 | 北京华德液压工业集团有限责任公司 | Plunger structure of axial hydraulic pump and axial hydraulic pump comprising same |
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