CN202252769U - Relief valve core for oil pump - Google Patents
Relief valve core for oil pump Download PDFInfo
- Publication number
- CN202252769U CN202252769U CN2011203365790U CN201120336579U CN202252769U CN 202252769 U CN202252769 U CN 202252769U CN 2011203365790 U CN2011203365790 U CN 2011203365790U CN 201120336579 U CN201120336579 U CN 201120336579U CN 202252769 U CN202252769 U CN 202252769U
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- CN
- China
- Prior art keywords
- oil pump
- piston
- cavity
- relief valve
- guide rod
- Prior art date
- 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.)
- Expired - Lifetime
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- Lubrication Of Internal Combustion Engines (AREA)
Abstract
The utility model discloses a relief valve core for an oil pump, comprising a plug screw, a spring, a guide rod and a piston, wherein the guide rod is sleeved with the spring, one end of the guide rod is connected with the plug screw, and the other end of the guide rod is sleeved with a front end cavity of the piston. The relief valve core for an oil pump is characterized in that the rear end of the piston is provided with a cavity, the rear side of the piston is provided with an annular slot, a through hole is formed on the annular slot, and the annular slot is communicated with the cavity through the through hole. According to the relief valve core for an oil pump, the rear end of the piston is provided with a cavity, the rear side of the piston is provided with an annular slot, and a through hole is formed between the annular slot and the cavity, thus realizing the aim that when the engine oil pressure gets close to a relief valve opening pressure, a liquid can be slowly removed through the cavity, the through hole and the annular slot in turn, and at the moment the relief valve does not need to be opened completely, thus avoiding substantial fluctuation of the engine oil in the oil pump due to frequent opening and closing of the relief valve, thereby improving the reliability of the oil pump.
Description
Technical field
The utility model relates to the oil pump technical field, is specifically related to a kind of Decompression valves spool of oil pump.
Technical background
Generally all have Decompression valves in the present oil pump, Decompression valves is opened when the oil pump outlet pressure reaches certain value, and part machine oil is shunted from Decompression valves, and the oil pump outlet pressure reduces, and Decompression valves cuts out in the time of under the oil pump outlet pressure drops to the Decompression valves limit value.Present Decompression valves all adopts the one-part form pressure relief; Machine oil in the oil pump is not carried out pressure release stage by stage; When engine oil pressure is paced up and down near the Decompression valves cracking pressure; The open and close that the Decompression valves meeting is frequent can cause the very big pressure surge of machine oil in the oil pump, has influenced the reliability of oil pump.
The model utility content
The purpose of the utility model is to above-mentioned technical problem, and a kind of Decompression valves spool that can reduce the oil pump of engine oil pressure fluctuation in the oil pump is provided.
For realizing this purpose, the Decompression valves spool of a kind of oil pump that the utility model designed comprises plug screw, spring, guide rod and piston; Wherein, socket spring on the guide rod, an end of guide rod connects plug screw; The front end cavity of socket piston on the other end of guide rod, it is characterized in that: the rear end of said piston offers cavity, and the rear side of said piston offers circular groove; Said circular groove is provided with through hole, and said circular groove is communicated with cavity through through hole.
Said through hole has four, and said four through holes circumferentially evenly are arranged on the circular groove along circular groove.
The beneficial effect of the utility model is: the utility model is provided with cavity through the rear end at piston; Rear side at piston is offered circular groove, between circular groove and cavity, through hole is set, and has realized when engine oil pressure is paced up and down near the Decompression valves cracking pressure; Machine oil can slowly be got rid of by cavity, through hole and circular groove successively; This moment, Decompression valves did not need to open fully, had avoided owing to the frequent open and close of Decompression valves engine oil pressure fluctuation in the oil pump that causes.Thereby, improved the reliability of oil pump.
Description of drawings
Fig. 1 is the structural representation of the utility model;
Fig. 2 is the sectional view of the piston portion in the utility model;
Fig. 3 is the working state figure of the utility model;
Wherein, on the pressure side oil groove, 9-oil pump intake side oil groove of 1-plug screw, 2-spring, 3-guide rod, 4-piston, 5-cavity, 6-circular groove, 7-through hole, 8-oil pump.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is done further to specify:
The Decompression valves spool of a kind of oil pump shown in Fig. 1～3 comprises plug screw 1, spring 2, guide rod 3 and piston 4, wherein; Socket spring 2 on the guide rod 3, an end of guide rod 3 connects plug screw 1, the front end cavity of socket piston 4 on the other end of guide rod 3; The rear end of piston 4 offers cavity 5; The rear side of piston 4 offers circular groove 6, and circular groove 6 is provided with through hole 7, and circular groove 6 is communicated with cavity 5 through through hole 7.
In the technique scheme, the quantity of through hole 7 need be set according to the actual pressure release demand of oil pump with size, and through hole 7 preferably has four, and above-mentioned four through holes 7 circumferentially evenly are arranged on the circular groove 6 along circular groove 6.
The working procedure of the utility model is: when oil pump when on the pressure side the engine oil pressure in the oil groove 8 increases to certain value; Machine oil promotes piston 4 to left movement; When piston 4 moved to circular groove 6 and communicates with oil pump intake side oil groove 9, the machine oil in the pressure fuel pump side oil groove 8 was through slowly flow to oil pump intake side oil groove 9 by cavity 5, four through holes 7 and circular groove 6 successively.Because the area of four through holes 7 is smaller, so machine oil pressure release slowly, engine oil pressure does not have big fluctuation.When oil pump when on the pressure side the engine oil pressure in the oil groove 8 continues to increase fast; Through hole 7 pressure release in time machine oil; Piston 4 continues to left movement; This moment oil pump on the pressure side oil groove 8 communicate fully with oil pump intake side oil groove 9, the quick a large amount of draining of Decompression valves guarantees that engine oil pressure drops to safety value.
The content that this specification is not done to describe in detail belongs to related domain professional and technical personnel's known prior art.
Claims (2)
1. the Decompression valves spool of an oil pump; Comprise plug screw (1), spring (2), guide rod (3) and piston (4), wherein, guide rod (3) is gone up socket spring (2); One end of guide rod (3) connects plug screw (1); The front end cavity of socket piston (4) on the other end of guide rod (3) is characterized in that: the rear end of said piston (4) offers cavity (5), and the rear side of said piston (4) offers circular groove (6); Said circular groove (6) is provided with through hole (7), and said circular groove (6) is communicated with cavity (5) through through hole (7).
2. the Decompression valves spool of oil pump according to claim 1, it is characterized in that: said through hole (7) has four, and said four through holes (7) circumferentially evenly are arranged on the circular groove (6) along circular groove (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203365790U CN202252769U (en) | 2011-09-08 | 2011-09-08 | Relief valve core for oil pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203365790U CN202252769U (en) | 2011-09-08 | 2011-09-08 | Relief valve core for oil pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202252769U true CN202252769U (en) | 2012-05-30 |
Family
ID=46114010
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203365790U Expired - Lifetime CN202252769U (en) | 2011-09-08 | 2011-09-08 | Relief valve core for oil pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202252769U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104728587A (en) * | 2013-12-18 | 2015-06-24 | 株式会社山田制作所 | Relief Device for Oil Pump |
| CN110159778A (en) * | 2019-06-03 | 2019-08-23 | 湖南机油泵股份有限公司 | A kind of pressure limiting valve plunger and the engine oil pump pressure-limiting valve for avoiding pressure oscillation |
-
2011
- 2011-09-08 CN CN2011203365790U patent/CN202252769U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104728587A (en) * | 2013-12-18 | 2015-06-24 | 株式会社山田制作所 | Relief Device for Oil Pump |
| CN104728587B (en) * | 2013-12-18 | 2019-06-28 | 株式会社山田制作所 | The overflow mechanism of oil pump |
| CN110159778A (en) * | 2019-06-03 | 2019-08-23 | 湖南机油泵股份有限公司 | A kind of pressure limiting valve plunger and the engine oil pump pressure-limiting valve for avoiding pressure oscillation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120530 |