CN207554326U - Plunger and plunger pump/piston motor - Google Patents
Plunger and plunger pump/piston motor Download PDFInfo
- Publication number
- CN207554326U CN207554326U CN201721428467.1U CN201721428467U CN207554326U CN 207554326 U CN207554326 U CN 207554326U CN 201721428467 U CN201721428467 U CN 201721428467U CN 207554326 U CN207554326 U CN 207554326U
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- Prior art keywords
- plunger
- ball
- spherical surface
- piston motor
- main shaft
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Abstract
The utility model is related to a kind of plunger and plunger pump or piston motor equipped with the plunger, the plunger includes plunger ball and the plunger stem for being connected with the plunger ball and being integrally formed with the plunger ball, the plunger is provided with the hydraulic pressure oil duct penetrated through along central axes, the plunger ball can be with the ball and socket of main shaft, the axial direction of the plunger ball along the plunger is provided with the spherical surface section of different bulb diameters, and, the bulb diameter of spherical surface section where the primary contact regions of the plunger ball and main shaft is more than the bulb diameter of other spherical surface sections of the plunger ball.
Description
Technical field
The utility model is related to technical field of hydraulic pressure, more particularly to a kind of plunger and the plunger pump equipped with the plunger
Or piston motor.
Background technology
In the course of work of plunger pump/piston motor, plunger is reciprocating in the cylinder holes of cylinder body, and plunger ball
Rubbing action occurs between head and the ball-and-socket of main shaft.Therefore plunger can be by multiple power such as axial compressive force, centrifugal force, frictional force
Collective effect.Especially when plunger pump/piston motor stops in compression shock, suddenly or rotating switching etc. is under special operation conditions, column
It is easy to that there is a situation where be in direct contact the corresponding position so as to cause plunger and main shaft between plug bulb and main shaft ball-and-socket
Abrasion.
Utility model content
The purpose of this utility model is one of at least to solve the above problems, which is achieved through the following technical solutions：
The utility model proposes a kind of plunger, the plunger include plunger ball and be connected with the plunger ball and with
The plunger stem that the plunger ball is integrally formed, the plunger are provided with the hydraulic pressure oil duct penetrated through along central axes, the plunger
Bulb can be provided with the ball of different bulb diameters with the ball and socket of main shaft, the axial direction of the plunger ball along the plunger
Face section, also, the bulb diameter of the spherical surface section where the primary contact regions of the plunger ball and main shaft is more than the column
Fill in the bulb diameter of other spherical surface sections of bulb.
Preferably, the hydraulic pressure oil duct is provided with damping hole, and the damping hole is located at the separate described of the plunger stem
The rear end of plunger ball.
It is further preferred that the plunger ball is provided with cylindrical surface and is located at institute respectively along the axial direction of the plunger
The preceding spherical surface of the both sides on cylindrical surface and rear spherical surface are stated, the preceding spherical surface is divided into three balls adjacent to each other along the axial direction
Face section, wherein, the bulb diameter of the intermediate spherical surface section in three spherical surface sections, which is more than, is located at the intermediate spherical surface section
Both sides spherical surface section.
It is further preferred that spherical surface is divided into adjacent to each other and different bulb diameter two along the axial direction after described
A spherical surface section.
One kind according to the present utility model is preferably carried out mode, and the plunger is cone-shaped plunger, and the plunger stem is certainly
Reduce to the front end being connected with the plunger ball rear end.
In addition, the utility model further relates to a kind of plunger pump/piston motor, the plunger pump/piston motor is equipped with upper
State plunger.
Preferably, the plunger pump/piston motor is angle type axial piston pump/piston motor.
The utility model has the advantage of：Plunger ball surface using different bulb diameters segment design ground special construction,
It ensure that plunger-secondary film strength of main shaft friction in plunger pump/piston motor operating, avoid plunger ball and main shaft ball
It is in direct contact between nest and causes to wear；The damping hole of plunger hydraulic oil duct is arranged on the rear end of plunger stem, avoids oil-poor existing
As further ensuring film strength, improving the lubricating status under bad working environments between plunger and main shaft.
Description of the drawings
By reading the detailed description of hereafter preferred embodiment, it is various other the advantages of and benefit it is common for this field
Technical staff will become clear.Attached drawing is only used for showing the purpose of preferred embodiment, and is not considered as to this practicality
Novel limitation.And throughout the drawings, the same reference numbers will be used to refer to the same parts.In the accompanying drawings：
Fig. 1 shows the structure diagram of the plunger according to the utility model embodiment；
Fig. 2 shows the assembling schematic diagrams according to the plunger of the utility model embodiment in the ball-and-socket of main shaft.
Specific embodiment
The illustrative embodiments of the disclosure are more fully described below with reference to accompanying drawings.Although this public affairs is shown in attached drawing
The illustrative embodiments opened, it being understood, however, that may be realized in various forms the disclosure without the reality that should be illustrated here
The mode of applying is limited.It is to be able to be best understood from the disclosure, and can be by this public affairs on the contrary, providing these embodiments
The range opened completely is communicated to those skilled in the art.
Embodiment according to the present utility model proposes a kind of plunger for plunger pump/piston motor.As shown in Figure 1,
The plunger of the utility model includes being located at the plunger ball of front end and is connected with plunger ball and is integrally formed with plunger ball
Plunger stem.In a state that plunger is assemblied in plunger pump/piston motor, plunger ball and plunger pump/piston motor
The ball and socket of main shaft, plunger stem are inserted into the cylinder holes of the cylinder body of plunger pump/piston motor, and when plunger pump/plunger horse
It is reciprocating and correspondingly so that plunger obtains pressure oil stroke and oil suction stroke in cylinder holes up to plunger stem during operating.Plunger
It is provided with the hydraulic pressure oil duct penetrated through along its central axes so that hydraulic oil can enter plunger ball from the rear end of plunger through hydraulic pressure oil duct
In gap between head and the ball-and-socket of main shaft, and main shaft and plunger this to friction it is secondary between form oil film, so as to prevent plunger
It is in direct contact between bulb and main shaft ball-and-socket and causes to wear.The plunger ball of the plunger of the utility model uses segment design,
I.e. plunger ball is in axial direction provided with different bulb diameters or the spherical surface section of radius of curvature so that plunger ball and main shaft
Primary contact regions or high-frequency resistance region where spherical surface section bulb diameter or radius of curvature be more than plunger ball its
The bulb diameter or radius of curvature of his spherical surface section.Preferred embodiment according to the present utility model, as depicted in figs. 1 and 2, column
Plug bulb is provided with cylindrical surface and is in axial direction located at the preceding spherical surface of the both sides on cylindrical surface and rear spherical surface respectively, and preceding spherical surface is along axis
It is divided into three spherical surfaces section AB, BC, CD adjacent to each other to direction, wherein, as the primary contact regions with main shaft ball-and-socket
Spherical surface section BC bulb diameter be more than positioned at its both sides spherical surface section AB and CD.In the mistake of plunger pump/piston motor operating
The oil film formed between Cheng Zhong, BC section and main shaft ball-and-socket is relatively thin, is formed between AB sections and CD sections and main shaft ball-and-socket
Oil film it is relatively thick therefore relatively large using being designed as the bulb diameter of the BC sections of primary contact regions or radius of curvature
(i.e. the curved surface of BC sections gentler or bending degree smaller), advantageously ensures that the film strength at primary contact regions, so as to
Make the lubrication between plunger ball and main shaft ball-and-socket more abundant, thus mitigate the degree of abrasion.It is further preferred that such as Fig. 1
It is shown, in order to realize better lubricant effect and ensure the better stress of plunger and the contact between main shaft ball-and-socket, rear ball
Face is in axial direction divided into two spherical surface sections EF and FG adjacent to each other and different bulb diameter.Implementation according to the present utility model
Mode, the dimensional tolerance of the corresponding site of main shaft, cylinder body and plunger should be designed to assure that plunger ball in the assembled condition and master
Fit-up gap between axis ball-and-socket is in rational range to ensure the plunger ball under plunger pump/piston motor operating condition
With the film strength between main shaft ball-and-socket, it is preferable that the fit-up gap between plunger ball and main shaft ball-and-socket is disposed in
In the range of 0.03mm-0.08mm.
In addition, preferred embodiment according to the present utility model, as shown in Figure 1, the damping hole of hydraulic pressure oil duct is set to
The rear end of plunger stem.The design cause more hydraulic oil be retained or be stored in hydraulic pressure oil duct can be replenished in time to
The position of the contact area of plunger and main shaft, so as to ensure frequently to load variation or the direction of motion in plunger pump/piston motor
Sufficient lubrication in the case of frequent switching between plunger ball and main shaft ball-and-socket avoids the occurrence of oil-poor phenomenon and causes secondary wiping secondary
The inordinate wear on surface.
The plunger of the utility model is preferably used for angle type axial piston pump/piston motor, i.e., the axial line of main shaft with
Plunger pump/piston motor that the axial line of cylinder body has a certain degree, as shown in Fig. 2, the axle center of the axial line of main shaft and cylinder body
Preferably into 40 ° of angle between line.Preferably, the plunger of the utility model is cone-shaped plunger, as shown in Figure 1, plunger stem
From rear end to the front end decrement being connected with plunger ball.In addition, the rear end of plunger stem is provided with annular groove, it can cloth in annular groove
Put the plunger ring for sealing.
The preferable specific embodiment of the above, only the utility model, but the scope of protection of the utility model is not
This is confined to, in the technical scope that any one skilled in the art discloses in the utility model, can be readily occurred in
Change or replacement, should be covered within the scope of the utility model.Therefore, the scope of protection of the utility model should be with
Subject to the scope of the claims.
Claims (7)
1. a kind of plunger, which is characterized in that the plunger include plunger ball and be connected with the plunger ball and with it is described
The plunger stem that plunger ball is integrally formed, the plunger are provided with the hydraulic pressure oil duct penetrated through along central axes, the plunger ball
Can the ball and socket of main shaft, the axial direction of the plunger ball along the plunger be provided with the spherical surface area of different bulb diameters
Section, also, the bulb diameter of the spherical surface section where the primary contact regions of the plunger ball and main shaft is more than the plunger ball
The bulb diameter of other spherical surface sections of head.
2. plunger according to claim 1, which is characterized in that the hydraulic pressure oil duct is provided with damping hole, the damping hole
Positioned at the rear end far from the plunger ball of the plunger stem.
3. plunger according to claim 1, which is characterized in that the plunger ball is provided with cylindrical surface and along the plunger
The axial direction preceding spherical surface positioned at the both sides on the cylindrical surface and rear spherical surface respectively, the preceding spherical surface is along the axial direction point
For three spherical surface sections adjacent to each other, wherein, the bulb diameter of the intermediate spherical surface section in three spherical surface sections is more than
Spherical surface section positioned at the both sides of the intermediate spherical surface section.
4. plunger according to claim 3, which is characterized in that spherical surface is divided into adjacent to each other along the axial direction after described
It connects and two spherical surface sections that bulb diameter is different.
5. the plunger according to any one of Claims 1-4, which is characterized in that the plunger is cone-shaped plunger, described
Plunger stem is from rear end to the front end decrement being connected with the plunger ball.
6. a kind of plunger pump/piston motor, which is characterized in that the plunger pump/piston motor be equipped with according to claim 1 to
Plunger described in any one of 5.
7. plunger pump/piston motor according to claim 6, which is characterized in that the plunger pump/piston motor is inclined shaft
Formula axial plunger pump/piston motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721428467.1U CN207554326U (en) | 2017-10-30 | 2017-10-30 | Plunger and plunger pump/piston motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721428467.1U CN207554326U (en) | 2017-10-30 | 2017-10-30 | Plunger and plunger pump/piston motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207554326U true CN207554326U (en) | 2018-06-29 |
Family
ID=62681618
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721428467.1U Active CN207554326U (en) | 2017-10-30 | 2017-10-30 | Plunger and plunger pump/piston motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207554326U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110242528A (en) * | 2019-05-06 | 2019-09-17 | 中航力源液压股份有限公司 | Hydraulic connection mechanism |
| CN113172543A (en) * | 2021-05-01 | 2021-07-27 | 金乡县恒海液压机械有限公司 | Inclined shaft type plunger motor small-opening spherical concave precision grinding machine |
-
2017
- 2017-10-30 CN CN201721428467.1U patent/CN207554326U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110242528A (en) * | 2019-05-06 | 2019-09-17 | 中航力源液压股份有限公司 | Hydraulic connection mechanism |
| CN113172543A (en) * | 2021-05-01 | 2021-07-27 | 金乡县恒海液压机械有限公司 | Inclined shaft type plunger motor small-opening spherical concave precision grinding machine |
| CN113172543B (en) * | 2021-05-01 | 2022-07-08 | 金乡县恒海液压机械有限公司 | Inclined shaft type plunger motor small-opening spherical concave precision grinding machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 261061 Shandong city in Weifang province Fu hi tech Industrial Development Zone, East Street No. 197 Patentee after: WEICHAI POWER Co.,Ltd. Patentee after: Weichai Hydraulic Transmission Co.,Ltd. Address before: 261061 Shandong city in Weifang province Fu hi tech Industrial Development Zone, East Street No. 197 Patentee before: WEICHAI POWER Co.,Ltd. Patentee before: LINDE HYDRAULICS (CHINA) Co.,Ltd. |