CN210510412U - Oil pump pressure limiting valve capable of preventing plunger from eccentric wear - Google Patents
Oil pump pressure limiting valve capable of preventing plunger from eccentric wear Download PDFInfo
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- CN210510412U CN210510412U CN201921527305.2U CN201921527305U CN210510412U CN 210510412 U CN210510412 U CN 210510412U CN 201921527305 U CN201921527305 U CN 201921527305U CN 210510412 U CN210510412 U CN 210510412U
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Abstract
The oil pump pressure limiting valve capable of preventing plunger eccentric wear comprises a valve hole, wherein the front end of the valve hole is communicated with an oil inlet of the pressure limiting valve, is provided with a step surface, and is provided with a plug at the rear end, a valve sleeve is installed in the valve hole, the front end of the valve sleeve is propped against the step surface, the rear end of the valve sleeve is propped against the plug, the hole body of the valve hole comprises an assembly section with the inner diameter matched with the outer diameter of the valve sleeve and an oil drainage section with the inner diameter larger than the outer diameter of the valve sleeve from front to back, the oil drainage section is communicated with an oil drainage port, a plurality of oil drainage holes are annularly arranged on the valve sleeve at the oil drainage section at intervals, a movable plunger is arranged in the valve sleeve, a mounting groove is formed in the rear end of the plunger, a spring. The utility model discloses the oil pressure that receives around can making the plunger is even to prevent that the plunger from wearing partially, reduce the plunger jamming risk.
Description
Technical Field
The utility model belongs to the technical field of the oil pump technique and specifically relates to a can prevent oil pump voltage limiting valve of plunger eccentric wear.
Background
The existing oil pump pressure limiting valve is generally provided with an oil drainage port (as shown in fig. 1 in the specification of the following patent document) on one side of a valve hole, when the oil pressure is too large, pressure oil pushes a plunger to move to the right so that the oil drainage port is opened, because the pressure at the oil outlet is small, and the pressure on other parts around the plunger is relatively large, this causes the high pressure oil to extrude the plunger to the oil drain port, which not only causes the friction between the plunger and the oil drain port to be intensified and the plunger to generate eccentric wear, but also increases the clearance of the high pressure side around the plunger, thereby, larger impurities can enter the clearance, the risk of plunger jamming is increased, if the pressure limiting valve has jamming or jamming phenomenon, the flow of the oil pump is too high or too low, so that the engine can have too high or too low oil pressure, thereby causing engine fault shutdown.
In order to solve the above problems, chinese patent CN201891604 discloses an annular oil discharge valve oil pump, wherein a guide groove is axially disposed at an end of a plunger, and four symmetrical oil discharge holes are disposed at the periphery of the guide groove for discharging oil during pressure relief, but in practice, the structure still cannot completely achieve the purpose of balanced oil discharge and reduction of unilateral abrasion of the plunger, because the outer wall surface of the plunger is still in direct contact with the inner wall surface of a valve hole of a pressure limiting valve, and only one oil discharge port is disposed at one side of the inner wall of the valve hole, the pressure applied around the plunger is still greater than the pressure applied at the oil discharge port, and the plunger can still be extruded towards the oil discharge port inevitably.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problem that a can prevent the oil pump pressure limiting valve of plunger eccentric wear is provided, can make the oil pressure power that receives around the plunger even to prevent the plunger eccentric wear, reduce the plunger jamming risk.
In order to solve the technical problem, the utility model discloses a following technical scheme: an oil pump pressure limiting valve capable of preventing plunger eccentric wear comprises a valve hole, wherein the front end of the valve hole is communicated with an oil inlet of the pressure limiting valve and is provided with a step surface, the rear end of the valve hole is provided with a plug, a valve sleeve is arranged in the valve hole, the front end of the valve sleeve supports against the step surface, the rear end of the valve sleeve supports against the plug, the hole body of the valve hole comprises an assembly section with the inner diameter matched with the outer diameter of the valve sleeve and an oil drainage section with the inner diameter larger than the outer diameter of the valve sleeve from front to back, the oil drainage section is communicated with an oil drainage port, a plurality of oil drainage holes are arranged on the valve sleeve in an annular and uniformly spaced mode, a movable plunger is arranged in the valve sleeve, the rear end of the plunger is provided with a mounting groove, a spring is arranged in the mounting groove, the front end of the spring supports against the bottom and the rear end, when the oil pressure is increased, the plunger moves backwards so that the oil drainage hole can be opened for oil drainage.
Preferably, the oil drainage holes comprise two first oil drainage holes and two second oil drainage holes, the two first oil drainage holes are symmetrically arranged on the upper side and the lower side of the valve sleeve, the two second oil drainage holes are symmetrically arranged on the left side and the right side of the valve sleeve, and a connecting line of axes of the two second oil drainage holes is positioned in front of or behind a connecting line of axes of the two first oil drainage holes.
More preferably, the inner diameter of the oil drainage section is enlarged from front to back.
Furthermore, the rear part of the valve sleeve is provided with a through hole communicated with the valve hole.
Furthermore, the front end of the plug is provided with a bowl-shaped bulge which is used for extending into the spring and has a guiding function on the spring.
The beneficial effects of the utility model reside in that: because the draining section of valve opening surrounds around the valve barrel, and annular and even interval are provided with a plurality of draining holes on the valve barrel, this makes fluid can get into around the draining section from each draining hole in the valve barrel evenly during draining, then discharge from the draining mouth again, at this in-process, the plunger is owing to only move about in the valve barrel, make the pressure that the plunger outer wall face received everywhere also can evenly distributed open, and the condition of certain draining hole department pressure undersize does not exist, thereby prevented that the plunger from taking place the eccentric wear, the risk of plunger jamming has been reduced.
Drawings
Fig. 1 is a schematic overall structure diagram in an embodiment of the present invention;
fig. 2 is a schematic structural diagram of the oil release hole opened by the rightward movement of the plunger in the oil release process in the embodiment.
The reference signs are:
1-valve hole 1 a-assembly section 1 b-oil drainage section
2-pressure limiting valve oil inlet 3-block 3 a-bowl-shaped projection
4-valve sleeve 4 a-oil drainage hole 4 b-through hole
5-plunger 6-spring 7-oil drain.
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.
It should be noted that, in the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
Furthermore, in the present disclosure, unless explicitly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature. The terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but 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 thus, should not be construed as limiting the present invention.
As shown in fig. 1-2, the oil pump pressure limiting valve capable of preventing plunger eccentric wear comprises a valve hole 1, wherein the front end of the valve hole 1 is communicated with an oil inlet 2 of the pressure limiting valve and is provided with a step surface, the rear end of the valve hole 1 is provided with a plug 3, a valve sleeve 4 is arranged in the valve hole 1, the front end of the valve sleeve 4 is propped against the step surface, the rear end of the valve sleeve is propped against the plug 3, the hole body of the valve hole 1 comprises an assembly section 1a with the inner diameter matched with the outer diameter of the valve sleeve 4 and an oil drainage section 1b with the inner diameter larger than the outer diameter of the valve sleeve 4 from front to back, the oil drainage section 1b is communicated with an oil drainage port 7, a plurality of oil drainage holes 4a are annularly and uniformly spaced on the valve sleeve 4 of the oil drainage section 1b, a movable plunger 5 is arranged in the valve sleeve 4, the rear end of the plunger 5 is provided with a mounting groove, a spring 6 is arranged in the mounting, when the oil pressure increases, the plunger 5 moves backward so that the drain hole 4a can be opened for draining.
After the valve sleeve 4 is arranged in the valve hole 1, the oil pump pressure limiting valve capable of preventing the plunger from eccentric wear is surrounded by the oil drainage section 1b of the valve hole 1, and the valve sleeve 4 is provided with the plurality of oil drainage holes 4a in an annular and uniform interval mode, so that oil can uniformly enter the valve hole 1 of the peripheral oil drainage section 1b from each oil drainage hole 4a during oil drainage and then is discharged from the oil drainage port 7.
Preferably, the oil drainage holes 4a include two first oil drainage holes and two second oil drainage holes, the two first oil drainage holes are symmetrically arranged on the upper side and the lower side of the valve sleeve 4, the two second oil drainage holes are symmetrically arranged on the left side and the right side of the valve sleeve 4, and the axis connecting line of the two second oil drainage holes is located in front of or behind the axis connecting line of the two first oil drainage holes, so that the two sets of symmetrical oil drainage holes 4a are staggered, and meanwhile, the distance between the two adjacent oil drainage holes 4a is ensured to be consistent, after the two sets of symmetrical oil drainage holes are staggered, high-pressure oil can be discharged from the two first oil drainage holes firstly and then from the two second oil drainage holes, and the oil drainage action performed step by step enables the oil pump to be smoother and more stable when the oil pump is opened for oil drainage, thereby reducing the fluctuation of the oil pressure in the pressure.
More preferably, the inner diameter of the oil drainage section 1b is designed to be expanded from front to back, and because the oil pressure just leaked from the oil drainage hole 4a is larger than the oil pressure at the oil drainage port at the rear part of the valve hole 1, the front space of the oil drainage section 1b is smaller than the rear space, which is more favorable for oil to flow backwards quickly for oil drainage.
Further, the through hole 4b of the communicating valve hole 1 is formed in the rear portion of the valve sleeve 4, so that oil liquid can be contained in the interior of the valve sleeve 4 and the mounting groove of the plunger 5, the lubricating effect is achieved, when the plug 3 moves backwards to enable all oil drainage holes 4a to be opened, the through hole 4b still keeps an opening state, the rear end of the valve sleeve 4 can be enabled not to form a closed space, and the movement of the plunger 5 can be enabled to be smooth.
In addition, in this embodiment, the front end that blocks up 3 is equipped with and is used for stretching into in the spring 6 and plays the protruding 3a of bowl form of guide effect to spring 6, this protruding 3a of bowl form not only can play the effect of guide to spring 6's removal, can also play the effect that restriction spring 6 rocked, avoid the spring to lead to the fact spring wear with the inner wall of valve barrel 4 and the inner wall excessive contact of 5 mounting grooves of plunger, influence spring life, guarantee the smooth and easy of plunger at valve barrel 4 internal motion, the noise that produces when also can avoid because of spring and the contact of above-mentioned each internal face to a great extent simultaneously.
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. Can prevent oil pump pressure limiting valve of plunger eccentric wear, including valve opening (1), the front end intercommunication pressure limiting valve oil inlet (2) of valve opening (1) are equipped with step face, rear end and install and block up (3), its characterized in that: install valve barrel (4) in valve opening (1), the front end of valve barrel (4) supports the step face, the rear end supports and blocks up (3), the hole body of valve opening (1) is by going to the back and including external diameter assorted assembly section (1 a) of internal diameter and valve barrel (4) and internal diameter be greater than draining section (1 b) of valve barrel (4) external diameter, draining section (1 b) intercommunication draining mouth (7), be located annular and even spaced apart a plurality of draining holes (4 a) are equipped with on valve barrel (4) of draining section (1 b), be equipped with mobilizable plunger (5) in valve barrel (4), the mounting groove has been seted up to the rear end of plunger (5), be equipped with spring (6) in the mounting groove, the front end of spring (6) supports the tank bottom portion, the rear end of mounting groove and supports and blocks up (3), under the elastic force effect of spring (6), plunger (5) are forward to support the step face and seal up all draining holes (4 a), when the oil pressure is increased, the plunger (5) moves backwards so that the oil drainage hole (4 a) can be opened for oil drainage.
2. The oil pump pressure limiting valve capable of preventing eccentric wear of the plunger as claimed in claim 1, characterized in that: the oil drainage hole (4 a) comprises two first oil drainage holes and two second oil drainage holes, the two first oil drainage holes are symmetrically arranged on the upper side and the lower side of the valve sleeve (4), the two second oil drainage holes are symmetrically arranged on the left side and the right side of the valve sleeve (4), and the axis connecting line of the two second oil drainage holes is positioned in front of or behind the axis connecting line of the two first oil drainage holes.
3. The oil pump pressure limiting valve capable of preventing eccentric wear of the plunger as claimed in claim 2, characterized in that: the inner diameter of the oil drainage section (1 b) is expanded from front to back.
4. The oil pump pressure limiting valve capable of preventing eccentric wear of the plunger as claimed in claim 3, characterized in that: the rear part of the valve sleeve (4) is provided with a through hole (4 b) communicated with the valve hole (1).
5. The oil pump pressure limiting valve capable of preventing eccentric wear of the plunger as claimed in claim 4, wherein: the front end of the plug (3) is provided with a bowl-shaped bulge (3 a) which is used for extending into the spring (6) and plays a guiding role for the spring (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921527305.2U CN210510412U (en) | 2019-09-16 | 2019-09-16 | Oil pump pressure limiting valve capable of preventing plunger from eccentric wear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921527305.2U CN210510412U (en) | 2019-09-16 | 2019-09-16 | Oil pump pressure limiting valve capable of preventing plunger from eccentric wear |
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| Publication Number | Publication Date |
|---|---|
| CN210510412U true CN210510412U (en) | 2020-05-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921527305.2U Active CN210510412U (en) | 2019-09-16 | 2019-09-16 | Oil pump pressure limiting valve capable of preventing plunger from eccentric wear |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110486509A (en) * | 2019-09-16 | 2019-11-22 | 湖南机油泵股份有限公司 | It can prevent the engine oil pump pressure-limiting valve of plunger eccentric wear |
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2019
- 2019-09-16 CN CN201921527305.2U patent/CN210510412U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110486509A (en) * | 2019-09-16 | 2019-11-22 | 湖南机油泵股份有限公司 | It can prevent the engine oil pump pressure-limiting valve of plunger eccentric wear |
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