CN112096938A - Oil pump pressure limiting valve capable of reducing plunger eccentric wear - Google Patents
Oil pump pressure limiting valve capable of reducing plunger eccentric wear Download PDFInfo
- Publication number
- CN112096938A CN112096938A CN202010978919.3A CN202010978919A CN112096938A CN 112096938 A CN112096938 A CN 112096938A CN 202010978919 A CN202010978919 A CN 202010978919A CN 112096938 A CN112096938 A CN 112096938A
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- CN
- China
- Prior art keywords
- oil
- plunger
- hole
- valve
- connecting rod
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/0446—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with an obturating member having at least a component of their opening and closing motion not perpendicular to the closing faces
- F16K17/046—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with an obturating member having at least a component of their opening and closing motion not perpendicular to the closing faces the valve being of the gate valve type or the sliding valve type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/10—Valves; Arrangement of valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N23/00—Special adaptations of check valves
Abstract
The oil pump pressure limiting valve comprises a valve body, wherein a valve hole is formed in the valve body, a signal oil hole for signal oil to enter is formed in the front end of the valve hole, a plug is installed at the rear end of the valve hole, a movable plunger is arranged in the valve hole, a compression spring is abutted between the plunger and the plug, a connecting rod is fixedly connected to the front end of the plunger, the front end of the connecting rod abuts against the front end of the valve hole, a push block matched with the inner wall of the valve hole is arranged at the front portion of the connecting rod, a feedback cavity for signal oil to enter is formed between the front end of the valve hole and the push block, an oil inlet hole communicated with a high-pressure oil cavity is formed in the inner wall of the valve hole on one side of the connecting rod, and an oil drainage hole communicated with an oil pan is formed in. The invention can reduce the eccentric wear of the plunger of the pressure limiting valve of the oil pump.
Description
Technical Field
The invention relates to the technical field of oil pumps, in particular to an oil pump pressure limiting valve capable of reducing plunger eccentric wear.
Background
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, a plunger, a spring and a screw plug, wherein the plunger, the spring and the screw plug are installed in the valve body, when the pressure limiting valve is not opened, an oil drainage hole of the valve body is blocked by the plunger, and after the pressure limiting valve is opened, the plunger moves and enables the oil drainage hole to be opened, so that high-pressure oil in a high-pressure cavity is directly drained to an oil pan.
In the existing oil pump pressure limiting valve, because the plunger piston is in clearance fit with the valve body, and high-pressure oil in the high-pressure cavity directly acts on the outer wall of the plunger piston to form a unilateral radial acting force, the other side of the plunger piston can be tightly attached to the inner wall of the valve body. When the pressure limiting valve reaches the opening pressure, the plunger starts to move, the plunger can cling to one side of the inner wall of the valve body due to the radial acting force of high-pressure oil and repeatedly rubs with the valve body, the plunger is eccentrically worn due to long-term operation, and the clamping risk is increased.
Disclosure of Invention
The invention aims to provide an oil pump pressure limiting valve capable of reducing eccentric wear of a plunger.
In order to solve the technical problems, the invention adopts the following technical scheme: an oil pump pressure limiting valve capable of reducing plunger eccentric wear comprises a valve body, wherein the valve body is provided with a valve hole, the front end of the valve hole is provided with a signal oil hole for signal oil to enter, the rear end of the valve hole is provided with a plug, a movable plunger is arranged in the valve hole, a compression spring is abutted between the plunger and the plug, the front end of the plunger is fixedly connected with a connecting rod, the front end of the connecting rod props against the front end of the valve hole, the front part of the connecting rod is provided with a push block matched with the inner wall of the valve hole, a feedback cavity for signal oil to enter is formed between the front end of the valve hole and the push block, an oil inlet hole communicated with the high-pressure oil cavity is formed on the inner wall of the valve hole on one side of the connecting rod, an oil drain hole communicated with the oil pan is formed on the inner wall of the valve hole on one side of the plunger, the inner diameter of the oil drainage hole is larger than half of the length of the plunger side wall and smaller than the total length of the plunger side wall.
Preferably, the rear end of the plunger is provided with a guide hole for the compression spring to extend into.
More preferably, the front end of the plug is provided with a positioning hole for the compression spring to extend into.
More preferably, an oil reservoir is annularly formed on an inner wall of the valve hole on the side circumferential surface of the plunger.
More preferably, the oil storage tank is communicated with the oil drainage hole.
More preferably, the plunger, the connecting rod and the push block are of an integrally formed structure.
The invention has the beneficial effects that: the oil inlet hole communicated with the high-pressure oil cavity is formed in the inner wall of the valve hole on one side of the connecting rod, so that when high-pressure oil enters the valve hole, generated radial acting force directly acts on the connecting rod instead of directly acting on the plunger, the connecting rod is fully filled with the oil around, the radial acting force is small, the connecting rod cannot be impacted obviously, the side face of the plunger cannot be subjected to the direct acting force of the high-pressure oil entering from the oil inlet hole, the other side of the plunger cannot frequently rub against the inner wall of the valve hole, and eccentric wear of the plunger is effectively 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 plunger, the connecting rod and the push block in the embodiment.
The reference signs are:
1-valve hole 2-plug 2 a-positioning hole
3-plunger 3 a-guide hole 4-compression spring
5-connecting rod 6-push block 7-oil inlet
8-oil drain hole 9-oil storage tank.
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, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are used broadly in the present invention, 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 meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Further, in the present invention, unless otherwise expressly specified or limited, the first feature "on" or "under" the second feature may comprise the first and second features being in direct contact, or may comprise the first and second features being in contact, not in direct contact, but via another feature in between. 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 those shown in the drawings, and are only for convenience in describing 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 invention.
As shown in fig. 1, the oil pump pressure limiting valve capable of reducing plunger eccentric wear comprises a valve body, the valve body is provided with a valve hole 1, the front end of the valve hole 1 is provided with a signal oil hole for signal oil to enter, the rear end of the valve hole 1 is provided with a plug 2, a movable plunger 3 is arranged in the valve hole 1, a compression spring 4 is connected between the plunger 3 and the plug 2 in a butting mode, the front end of the plunger 3 is fixedly connected with a connecting rod 5, the front end of the connecting rod 5 butts against the front end of the valve hole 1, the front portion of the connecting rod 5 is provided with a push block 6 matched with the inner wall of the valve hole 1, a feedback cavity for signal oil to enter is formed between the front end of the valve hole 1 and the push block 6, the inner wall of the valve hole 1 on one side of the connecting rod 5 is provided with an oil inlet 7 communicated with a high-pressure oil cavity, the inner wall of the valve hole.
The oil pump pressure limiting valve capable of reducing the eccentric wear of the plunger piston provided by the embodiment is characterized in that under the action of the compression spring 4, the plunger piston 3 is pushed forwards to completely block the oil suction hole 8, and at the moment, the front end of the connecting rod 5 abuts against the front end of the valve hole 1, and the feedback cavity is provided with certain signal oil. Treat when external system oil hydraulic pressure increases, signal oil can enter into the feedback chamber from the signal oilhole more to promote ejector pad 6, and then make connecting rod 5 promote plunger 3 and move backward, draining hole 8 opens gradually this moment, makes inlet port 7, valve opening 1 and draining hole 8 form the intercommunication form, lets the high-pressure oil that inlet port 7 got into can let out from draining hole 8, accomplishes the pressure release work.
In the working process, the oil inlet hole 7 communicated with the high-pressure oil cavity is arranged on the inner wall of the valve hole 1 positioned on one side of the connecting rod 5, so that when high-pressure oil enters the valve hole 1, the generated radial acting force is directly acted on the connecting rod 5 instead of directly acting on the plunger 3, the periphery of the connecting rod 5 is filled with oil, the radial acting force is smaller, the connecting rod 5 cannot be impacted obviously, and the side surface of the plunger 3 cannot be subjected to the direct acting force of the high-pressure oil entering from the oil inlet hole, so that the other side of the plunger 3 cannot be frequently rubbed with the inner wall of the valve hole 1, and the eccentric wear of the plunger 3 is effectively reduced.
Preferably, the rear end of the plunger 3 is opened with a guide hole 3a for the compression spring 4 to extend into, which makes the movement of the compression spring 4 more stable. The front end of the plug 2 is provided with a positioning hole 2a for the compression spring 4 to extend into, so that the compression spring 4 can be positioned more conveniently in the assembling process, and the assembling difficulty is reduced.
In addition, in this embodiment, the oil storage tank 9 has been seted up to the annular on being located the valve opening 1 inner wall of plunger 3 side global, can improve the lubricated effect to plunger 3 side like this, makes the motion of plunger 3 more smooth and easy, and a small amount of pieces that form after long-time friction of plunger 3 and valve opening 1 inner wall also can fall in this oil storage tank 9 in addition to prevent to cause the jamming to plunger 3, influence the motion of plunger 3. Moreover, still can make oil storage tank 9 intercommunication draining hole 8 to make foretell piece can send easily to discharge from draining hole 8, moreover, annular oil storage tank 9 can avoid this section part of valve opening 1 inner wall to let the problem that the cutter gave way to valve opening 1 size production deviation that leads to because of the unilateral processing of draining hole 8 when adding man-hour.
Preferably, as shown in fig. 2, the plunger 3, the connecting rod 5 and the pushing block 6 are of an integrally formed structure, and the structural stability is better.
The above embodiments are preferred implementations of the present invention, and the present invention can be implemented in other ways without departing from the spirit of the present invention.
Some of the drawings and descriptions of the present invention have been simplified to facilitate the understanding of the improvements over the prior art by those skilled in the art, and some other elements have been omitted from this document for the sake of clarity, and it should be appreciated by those skilled in the art that such omitted elements may also constitute the subject matter of the present invention.
Claims (6)
1. Can reduce oil pump pressure limiting valve of plunger eccentric wear, including the valve body, its characterized in that: the valve body is provided with a valve hole (1), the front end of the valve hole (1) is provided with a signal oil hole for signal oil to enter, the rear end of the valve hole (1) is provided with a plug (2), a movable plunger (3) is arranged in the valve hole (1), a compression spring (4) is abutted between the plunger (3) and the plug (2), the front end of the plunger (3) is fixedly connected with a connecting rod (5), the front end of the connecting rod (5) is abutted against the front end of the valve hole (1), the front part of the connecting rod (5) is provided with a push block (6) matched with the inner wall of the valve hole (1), a feedback cavity for signal oil to enter is formed between the front end of the valve hole (1) and the push block (6), an oil inlet hole (7) communicated with a high-pressure oil cavity is formed on the inner wall of the valve hole (1) on one side of the connecting rod (5), and an oil drain hole (8) communicated with an oil drain hole, the inner diameter of the oil drainage hole (8) is larger than half of the length of the side wall of the plunger (3) and smaller than the total length of the side wall of the plunger (3).
2. The oil pump pressure limiting valve capable of reducing plunger eccentric wear of claim 1, wherein: the rear end of the plunger (3) is provided with a guide hole (3 a) for the compression spring (4) to extend into.
3. The oil pump pressure limiting valve capable of reducing plunger eccentric wear of claim 2, wherein: the front end of the plug (2) is provided with a positioning hole (2 a) for the compression spring (4) to extend into.
4. The oil pump pressure limiting valve capable of reducing plunger eccentric wear of claim 3, wherein: and an oil storage tank (9) is annularly arranged on the inner wall of the valve hole (1) on the lateral periphery of the plunger (3).
5. The oil pump pressure limiting valve capable of reducing plunger eccentric wear of claim 4, wherein: the oil storage tank (9) is communicated with the oil drainage hole (8).
6. The oil pump pressure limiting valve capable of reducing plunger eccentric wear according to any one of claims 1 to 5, characterized in that: the plunger (3), the connecting rod (5) and the push block (6) are of an integrally formed structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010978919.3A CN112096938A (en) | 2020-09-17 | 2020-09-17 | Oil pump pressure limiting valve capable of reducing plunger eccentric wear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010978919.3A CN112096938A (en) | 2020-09-17 | 2020-09-17 | Oil pump pressure limiting valve capable of reducing plunger eccentric wear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112096938A true CN112096938A (en) | 2020-12-18 |
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ID=73759821
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010978919.3A Pending CN112096938A (en) | 2020-09-17 | 2020-09-17 | Oil pump pressure limiting valve capable of reducing plunger eccentric wear |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112096938A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103225736A (en) * | 2013-04-16 | 2013-07-31 | 湖南机油泵股份有限公司 | Engine oil pump with stable oil pressure |
| CN109357144A (en) * | 2018-12-18 | 2019-02-19 | 湖南机油泵股份有限公司 | A kind of pressure limiting valve plug screw and plunger type lubrication oil pump pressure limiting valve |
| 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 |
| CN110486610A (en) * | 2019-09-18 | 2019-11-22 | 湖南机油泵股份有限公司 | A kind of lubricating oil pump that can improve degree of regulation |
| CN110617342A (en) * | 2019-10-16 | 2019-12-27 | 湖南机油泵股份有限公司 | Pressure regulating valve capable of reducing pressure fluctuation |
-
2020
- 2020-09-17 CN CN202010978919.3A patent/CN112096938A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103225736A (en) * | 2013-04-16 | 2013-07-31 | 湖南机油泵股份有限公司 | Engine oil pump with stable oil pressure |
| CN109357144A (en) * | 2018-12-18 | 2019-02-19 | 湖南机油泵股份有限公司 | A kind of pressure limiting valve plug screw and plunger type lubrication oil pump pressure limiting valve |
| 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 |
| CN110486610A (en) * | 2019-09-18 | 2019-11-22 | 湖南机油泵股份有限公司 | A kind of lubricating oil pump that can improve degree of regulation |
| CN110617342A (en) * | 2019-10-16 | 2019-12-27 | 湖南机油泵股份有限公司 | Pressure regulating valve capable of reducing pressure fluctuation |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201218 |
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| RJ01 | Rejection of invention patent application after publication |