CN210152879U - Oil pump pressure limiting valve for improving plunger abrasion - Google Patents
Oil pump pressure limiting valve for improving plunger abrasion Download PDFInfo
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- CN210152879U CN210152879U CN201921043269.2U CN201921043269U CN210152879U CN 210152879 U CN210152879 U CN 210152879U CN 201921043269 U CN201921043269 U CN 201921043269U CN 210152879 U CN210152879 U CN 210152879U
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Abstract
The utility model discloses an improve oil pump voltage limiting valve of plunger wearing and tearing, which comprises a valve body, install the plunger in the valve pocket of valve body, spring and plug screw, the plunger includes cylindric portion, shaft-like portion and disc portion, the valve body passes through low pressure chamber through-hole and low pressure chamber intercommunication, the valve body passes through high pressure chamber through-hole and high pressure chamber intercommunication, the low pressure chamber through-hole is more close to the disc portion of plunger for the high pressure chamber through-hole, round annular oil groove has been seted up in the corresponding position of high pressure chamber through-hole on the inner wall of valve body, annular oil groove and high pressure chamber through-hole intercommunication, annular oil groove and high pressure chamber through-hole are close to disc portion on. When the plunger of the pressure limiting valve moves, the outer wall of the cylindrical part of the plunger is subjected to the pressure of high-pressure oil in the annular oil groove along the circumferential direction, so that the stress is balanced, the plunger cannot be tightly attached to the inner wall of the valve body under the action of unilateral radial force of the high-pressure oil, the clamping risk can be effectively reduced, the reliability is improved, and the pressure limiting valve has a wide application prospect.
Description
Technical Field
The utility model relates to an oil pump technical field, in particular to improve oil pump voltage limiting valve of plunger wearing and tearing.
Background
The oil pump is an important part in a lubricating system and has the function of providing the lubricating system with oil with enough pressure and flow so as to ensure that each friction part is fully lubricated and the related pressure-bearing part is not damaged.
The oil pump pressure limiting valve plays a role in controlling oil flow and adjusting oil pressure in the operation process of an oil pump and comprises a valve body, and a plunger, a spring and a plug screw which are arranged in the valve body. The existing oil pump pressure limiting valve has the advantages that the plunger is in clearance fit with the valve body, one side of the plunger can be tightly attached to the inner wall of the valve body under the action of unilateral radial force of high-pressure oil in a high-pressure cavity, when the oil pump reaches opening pressure, the plunger starts to move, the plunger is tightly attached to one side of the inner wall of the valve body and repeatedly rubs with the valve body, the unilateral severe abrasion of the plunger can be caused after long-term operation, the clamping risk is increased, and the reliability is not.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a can effectively reduce the jamming risk, the higher oil pump voltage limiting valve who improves plunger wearing and tearing of reliability.
In order to solve the technical problem, the utility model discloses a following technical scheme:
the oil pump pressure limiting valve comprises a valve body, wherein a plunger, a spring and a screw plug are installed in a valve cavity of the valve body, the plunger comprises a cylindrical part, a rod-shaped part and a disc part, the valve body is communicated with a low-pressure cavity through hole, the valve body is communicated with a high-pressure cavity through hole, the low-pressure cavity through hole is closer to the disc part of the plunger relative to the high-pressure cavity through hole, a circle of annular oil groove is formed in the inner wall of the valve body at the position corresponding to the high-pressure cavity through hole, the annular oil groove is communicated with the high-pressure cavity through hole, and the annular oil groove and the high-pressure cavity through hole are located on the same cross section.
Preferably, the low pressure chamber through hole is located on the left side of the high pressure chamber through hole.
Preferably, the right side of the annular oil groove and the left side of the cylindrical part when the pressure limiting valve is fully opened are both positioned on the same cross section of the valve body.
Preferably, the right side of the annular oil groove and the right side of the high-pressure cavity through hole are both located on the same cross section of the valve body.
Preferably, the left side and the right side of the annular oil groove are both provided with chamfers.
Compared with the prior art, the utility model discloses following beneficial effect has: the oil pump pressure limiting valve for improving plunger abrasion is characterized in that a circle of annular oil groove is formed in the valve body, and lubricating oil in the high-pressure cavity can enter and fill the annular oil groove. After the pressure limiting valve reaches the opening oil pressure and is opened, the outer wall of the cylindrical part of the plunger piston is subjected to the pressure of high-pressure oil in the annular oil groove along the circumferential direction in the process that the plunger piston moves towards the screw plug, so that the stress is balanced, the plunger piston cannot be tightly attached to the inner wall of the valve body under the action of unilateral radial force of the high-pressure oil, and the plunger piston is prevented from being abraded in the moving process. The utility model provides an oil pump pressure limiting valve can effectively reduce the jamming risk, improves the reliability, has very wide application prospect.
Drawings
Fig. 1 is a front view structural diagram of the oil pump pressure limiting valve of the present invention when it is not opened.
Fig. 2 is a front view structural view of the plunger and the spring in fig. 1, which mainly shows the opening position of the annular oil groove.
Fig. 3 is a front view structural diagram of the oil pump pressure limiting valve of the present invention when opened.
The reference signs are:
1-plunger 2-spring 3-low pressure cavity through hole
4-high pressure cavity through hole 5-annular oil groove 6-chamfer
7-valve body 1 a-cylindrical portion 1 b-rod-shaped portion
1 c-disc portion.
Detailed Description
In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and drawings, which are not intended to limit the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
An oil pump pressure limiting valve for improving plunger abrasion comprises a valve body 7, wherein a plunger 1, a spring 2 and a screw plug are installed in a valve cavity of the valve body 7, the plunger 1 comprises a cylindrical portion 1a, a rod-shaped portion 1b and a disc portion 1c, the valve body 7 is communicated with a low-pressure cavity through hole 3, the valve body 7 is communicated with a high-pressure cavity through hole 4, the low-pressure cavity through hole 3 is closer to the disc portion 1c of the plunger 1 when the pressure limiting valve is not opened relative to the high-pressure cavity through hole 4, a circle of annular oil groove 5 is formed in the inner wall of the valve body 7, the position of the annular oil groove 5 corresponds to the position of the high-pressure cavity through hole 4, the annular oil groove 5 is communicated with the high-pressure cavity through hole 4, and the left side of the annular oil groove 5 and the left.
According to the oil pump pressure limiting valve for improving plunger abrasion, the annular oil groove 5 is formed in the valve body 7, and lubricating oil in the high-pressure cavity can enter and fill the annular oil groove 5. As shown in fig. 3, after the pressure limiting valve reaches the opening oil pressure and is opened, the lubricating oil in the high pressure chamber flows to the low pressure chamber (the flow direction refers to the arrow in the figure), and the outer wall of the cylindrical part 1a of the plunger 1 is subjected to the pressure of the high pressure oil in the annular oil groove 5 along the circumferential direction in the process that the plunger 1 moves towards the plug screw, so that the stress is balanced, the plunger 1 cannot be tightly attached to the inner wall of the valve body 7 under the action of the unilateral radial force of the high pressure oil, and the plunger 1 is prevented from being worn in the moving process. The utility model provides an oil pump pressure limiting valve can effectively reduce the jamming risk, improves the reliability.
In the above embodiment, the low pressure chamber through hole 3 is located on the left side of the high pressure chamber through hole 4.
As a preferred embodiment of the present invention, the right side of the annular oil groove 5 and the left side of the pressure limiting valve fully-opened cylindrical portion 1a are both located on the same cross section of the valve body 7. The arrangement ensures that the cylindrical part 1a of the plunger 1 is always balanced by lubricating oil in the annular oil groove 5 and does not cling to the inner wall of the valve body 7 under the action of unilateral radial force of high-pressure oil in the process from the moment that the pressure limiting valve reaches the opening pressure to the moment that the pressure limiting valve is fully opened. Further, the right side of the annular oil groove 5 can be arranged to be located on the same cross section of the valve body 7 as the right side of the high pressure chamber through hole 4.
As a preferred embodiment in the present invention, the left and right sides of the annular oil groove 5 are both provided with chamfers 6. Through set up the chamfer at 5 outer lanes in annular oil groove, not only can avoid appearing sharp limit burr in the course of working, also make the pressure-limiting valve can not increase suddenly at the in-process earial drainage area of opening moreover to can not cause the pressure oscillation.
The above-mentioned embodiment is the utility model discloses the implementation scheme of preferred, in addition, the utility model discloses can also realize by other modes, any obvious replacement is all within the protection scope of the utility model under the prerequisite that does not deviate from this technical scheme design.
In order to make it easier for those skilled in the art to understand the improvement of the present invention over the prior art, some drawings and descriptions of the present invention have been simplified, and in order to clarify, some other elements have been omitted from this document, those skilled in the art should recognize that these omitted elements may also constitute the content of the present invention.
Claims (5)
1. The utility model provides an improve oil pump pressure limiting valve of plunger wearing and tearing, includes valve body (7), install plunger (1), spring (2) and plug screw in the valve pocket of valve body (7), plunger (1) includes barrel portion (1 a), shaft-like portion (1 b) and disc portion (1 c), valve body (7) communicate with the low pressure chamber through-hole (3), valve body (7) communicate with the high pressure chamber through-hole (4), low pressure chamber through-hole (3) are closer to disc portion (1 c) of plunger (1) for high pressure chamber through-hole (4), its characterized in that: the inner wall of the valve body (7) is provided with a circle of annular oil groove (5) at the position corresponding to the high-pressure cavity through hole (4), the annular oil groove (5) is communicated with the high-pressure cavity through hole (4), and the annular oil groove (5) and the high-pressure cavity through hole (4) are positioned on the same cross section of the valve body (7) at the same side close to the disc part (1 c).
2. The oil pump pressure limiting valve for improving the abrasion of the plunger piston as claimed in claim 1, wherein: the low-pressure cavity through hole (3) is positioned on the left side of the high-pressure cavity through hole (4).
3. The oil pump pressure limiting valve for improving the abrasion of the plunger piston as claimed in claim 2, wherein: the right side of the annular oil groove (5) and the left side of the cylindrical part (1 a) when the pressure limiting valve is fully opened are both positioned on the same cross section of the valve body (7).
4. The oil pump pressure limiting valve for improving the abrasion of the plunger piston as claimed in claim 1, wherein: the right side of the annular oil groove (5) and the right side of the high-pressure cavity through hole (4) are both located on the same cross section of the valve body (7).
5. An oil pump pressure limiting valve for improving plunger wear according to any one of claims 1 to 4, wherein: the left side and the right side of the annular oil groove (5) are both provided with chamfers (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921043269.2U CN210152879U (en) | 2019-07-05 | 2019-07-05 | Oil pump pressure limiting valve for improving plunger abrasion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921043269.2U CN210152879U (en) | 2019-07-05 | 2019-07-05 | Oil pump pressure limiting valve for improving plunger abrasion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210152879U true CN210152879U (en) | 2020-03-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921043269.2U Active CN210152879U (en) | 2019-07-05 | 2019-07-05 | Oil pump pressure limiting valve for improving plunger abrasion |
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| Country | Link |
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| CN (1) | CN210152879U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110219799A (en) * | 2019-07-05 | 2019-09-10 | 湖南机油泵股份有限公司 | A kind of engine oil pump pressure-limiting valve improving plunger wear |
-
2019
- 2019-07-05 CN CN201921043269.2U patent/CN210152879U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110219799A (en) * | 2019-07-05 | 2019-09-10 | 湖南机油泵股份有限公司 | A kind of engine oil pump pressure-limiting valve improving plunger wear |
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