CN212745940U - Oil pump for reducing oil pressure drop - Google Patents
Oil pump for reducing oil pressure drop Download PDFInfo
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- CN212745940U CN212745940U CN202021665449.7U CN202021665449U CN212745940U CN 212745940 U CN212745940 U CN 212745940U CN 202021665449 U CN202021665449 U CN 202021665449U CN 212745940 U CN212745940 U CN 212745940U
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- 230000007423 decrease Effects 0.000 abstract description 5
- 239000012530 fluid Substances 0.000 description 11
- 238000005461 lubrication Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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Abstract
The utility model provides an oil pump for reducing oil pressure decline, which comprises a pump body, the pump body includes variable control chamber, be equipped with the pilot valve on the pump body, the pilot valve includes the plunger, a spring, the plug screw and set up the valve opening on the pump body, the plunger is whole to be "shi" font, including the bellying, shaft-like portion and the big disc and the small circle dish that set up respectively at shaft-like portion both ends, big disc includes the first terminal surface of being connected with the bellying and the second terminal surface of being connected with shaft-like portion, the valve opening both sides respectively are equipped with first oilhole and second oilhole, first oilhole is close to the second terminal surface, the second oilhole is close to first terminal surface, the small circle dish is located first oilhole below, the valve opening inner wall is equipped with the annular with second oilhole parallel and. According to the technical scheme, the annular groove is formed in the pilot valve, so that the influence of pressure oil leakage from the end face gap of the oil cavity to the variable control cavity can be counteracted to a great extent, and the problem of oil pressure reduction caused by temperature rise is solved.
Description
Technical Field
The utility model relates to an oil pump technical field especially relates to an oil pump for reducing oil pressure decline.
Background
Pressure oil in a variable control cavity of an oil pump of the existing pilot valve controlled secondary variable vane generally flows into a main oil duct after being filtered by a machine cooler and is controlled to be fed back through an electromagnetic valve, and pressure of a feedback oil cavity and an oil outlet of the oil pump is reduced because the pressure of the oil is attenuated after being filtered by the machine cooler.
High-pressure oil entering the main oil duct from the oil outlet of the oil pump for pressure lubrication leaks to the variable control cavity through the end face gap, so that extra pressure appears in the variable control cavity, the oil pressure from the main oil duct participates in the variable control cavity, and the variable control is carried out under the action of the oil pressure and the pressure oil of the variable control cavity, so that the variable control is inaccurate, even the variable control is not according to the expected variable, or the variable control is advanced.
Particularly, as the temperature rises, the end face clearance between the oil cavity and the variable control cavity is increased, and oil leaking from the oil cavity to the variable control cavity is increased, so that the oil entering the main oil gallery from the oil cavity is reduced, the oil pressure of the main oil gallery is reduced, and the pressure lubrication is influenced.
If a structure for increasing the inflow of oil can be provided in the pilot valve, the influence of the leakage of pressure oil from the end face clearance of the oil chamber to the variable control chamber can be offset, and the problem of the drop of oil pressure caused by the rise of temperature can be reduced.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a oil pump for reducing oil pressure decline is provided for offset the oil pocket and leak the influence that pressure oil produced to the variable control chamber from end face clearance.
In order to achieve the purpose of the invention, the utility model adopts the following scheme: the oil pump for reducing oil pressure drop comprises a pump body, wherein the pump body comprises a variable control cavity, and a pilot valve is arranged on the pump body, and the oil pump is characterized in that: the pilot valve includes plunger, spring, plug screw and sets up the valve opening on the pump body, the plunger wholly is "shi" font, including bellying, shaft-like portion and the big disc and the little disc that set up respectively at shaft-like portion both ends, big disc includes the first terminal surface of being connected with the bellying and the second terminal surface of being connected with shaft-like portion, the valve opening both sides respectively are equipped with first oilhole and second oilhole, first oilhole and second oilhole not parallel and level, first oilhole is close to the second terminal surface, the second oilhole is close to first terminal surface, little disc is located first oilhole below, the valve opening inner wall is equipped with the annular with second oilhole parallel and level, the pilot valve is linked together through second oilhole and variable control chamber.
Preferably, the side part of the second end face is provided with a chamfer.
Further, the vertical height of the chamfer is greater than the width of the ring groove.
Preferably, the width of the ring groove is not greater than the bore diameter of the second oil hole.
Preferably, the aperture diameter of the first oil hole is equal to the aperture diameter of the second oil hole.
The utility model discloses a set up the annular in the pilot valve, can increase the passage area when the pilot valve is opened for fluid can more get into the variable control chamber faster, offsets the oil pocket at to a great extent and leaks the influence that pressure oil produced to the variable control chamber from end face clearance, and it is accurate to guarantee variable control chamber variable, and reduces the oil pressure decline problem that leads to because of the temperature rise.
Drawings
FIG. 1 is a schematic view of the connection between the pump body and the pilot valve according to the present invention;
fig. 2 is a schematic structural diagram of the middle pilot valve of the present invention.
In the figure:
1-pump body 2-pilot valve 3-variable control cavity
4-oil chamber 5-valve hole 6-spring
7-second oil hole 8-plunger 8 a-lug boss
8 b-first end face 8 c-chamfer 8 d-second end face
8 e-rod-shaped part 8 f-small disc 9-screw plug
10-ring groove 11-first oil hole.
Detailed Description
In order to facilitate the understanding of those skilled in the art, the present invention will be further described with reference to the following examples, which are not intended to limit the scope of the present invention.
In the description of the present invention, it is to be understood that the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise. In the description of the present invention, it should be noted that, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, mechanically or electrically connected, or interconnected between two elements, directly or indirectly through intervening media, and the specific meaning of the terms may be understood by those skilled in the art according to their specific situation.
As shown in fig. 1 and 2, an oil pump for reducing oil pressure drop comprises a pump body 1, the pump body 1 comprises a variable control chamber 3 and an oil chamber 4, the pump body 1 is provided with a pilot valve 2, the pilot valve 2 comprises a plunger 8, a spring 6, a screw plug 9 and a valve hole 5 arranged on the pump body 1, the plunger 8 is integrally shaped like a Chinese character 'ji', and comprises a convex part 8a, a rod-shaped part 8e, a large disc and a small disc 8f which are respectively arranged at two ends of the rod-shaped part 8e, the large disc comprises a first end surface 8b connected with the convex part 8a and a second end surface 8d connected with the rod-shaped part 8e, the plunger 8 is arranged in the valve hole 5, two sides of the valve hole 5 are respectively provided with a first oil hole 11 and a second oil hole 7, the first oil hole 11 is not flush with the second oil hole 7, the first oil hole 11 is close to the second end surface 8d, the second oil hole 7 is close to the first, make and form the pressure chamber between shaft-like portion 8e and the valve opening 5, through 11 input oil to pressure chamber changes pressure in first oilhole, 5 inner walls of valve opening still are equipped with the annular 10 with 7 parallel and level in second oilhole, can increase the fluid passage area when pilot valve 2 opens, the one end cover of spring 6 is in plug screw 9, the other end cover is in bellying 8a and supports and lean on first terminal surface 8b, pilot valve 2 is linked together through second oilhole 7 and variable control chamber 3. For the cooperation annular 10 for the fluid that gets into pilot valve 2 can get into annular 10 more fast, is equipped with chamfer 8c at second terminal surface 8d lateral part, when extrusion second terminal surface 8d moves to 6 directions of spring, can be when chamfer 8c reachs annular 10, fluid can get into in advance, and chamfer 8 c's vertical height can be greater than the width of annular 10, can increase fluid entry speed in the at utmost to further increase the fluid area of passage when pilot valve 2 opens. To ensure stable oil when the pilot valve 2 is fully opened, the width of the ring groove 10 is not greater than the diameter of the second oil hole 7, and the diameter of the first oil hole 11 may be equal to the diameter of the second oil hole 7.
The oil in the oil chamber 4 is delivered to the friction pair through the main oil duct for pressure lubrication, wherein the main oil duct is divided into an oil duct for inputting the oil to the pilot valve 2, the oil enters through the first oil hole 11, then the second end face 8d of the plunger 8 is extruded to move towards the spring 6, when the chamfer 8c of the second end face 8d reaches the position of the annular groove 10, the oil starts to enter the second oil hole 7 through the annular groove 10 and enters the variable control chamber 3, at the moment, the oil in the oil chamber 4 leaks into the variable control chamber 3 through the end face gap and is counteracted by the oil pressure entering from the annular groove 10, and the oil dominant position leaked from the oil chamber 4 is replaced, so that the generation of extra pressure is reduced, and the pressure variable of the variable control chamber 3 becomes accurate. And along with the temperature rise, the end face clearance between the oil cavity 4 and the variable control cavity 3 is increased, the oil leaked from the oil cavity 4 and entering the variable control cavity 3 is increased, the oil can enter the variable control cavity 3 more quickly by arranging the annular groove 10 and the chamfer 8c, the oil pressure leaked from the oil cavity 4 is quickly offset, when the oil entering from the second oil hole 7 is quickly offset and covers the oil leaked from the oil cavity 4, the continuous leakage of the oil in the oil cavity 4 can be prevented from entering, the oil entering from the oil cavity 4 into the main oil duct is kept normal and is not reduced, the pressure is not reduced, and the influence on pressure lubrication is reduced.
Simultaneously, when current pilot valve 2 does not set up annular 10, only flow into fluid through second oilhole 7, because be unilateral inflow fluid, the area of the passageway that flows into fluid is very little at the beginning, leads to the oil pressure vibration easily, after having set up annular 10 and chamfer 8c, can produce fluid equilibrant stable pilot valve 2 when making pilot valve 2 open, can reduce the production of oil pressure vibration problem.
To sum up, the utility model discloses a set up annular 10 in pilot valve 2, can increase the area of passage when opening for fluid can be more faster get into variable control chamber 3, offsets the influence that oil pocket 4 produced from end face clearance leakage pressure oil to variable control chamber 3 at to a great extent, guarantees that 3 variables in variable control chamber are accurate, and reduces the oil pressure decline problem that leads to because of the temperature rise.
The above description is only for the preferred embodiment of the present invention, and the present invention is not limited thereto in any way, and although the present invention has been disclosed for the preferred embodiment, it is not intended to limit the form and style of the product of the present invention, and those skilled in the art can make some modifications or modifications to the equivalent embodiment without departing from the scope of the present invention, but all that does not depart from the technical solution of the present invention still fall within the scope of the patent of the present invention.
Claims (5)
1. An oil pump for reducing oil pressure drop, includes the pump body (1), the pump body (1) includes variable control chamber (3), be equipped with pilot valve (2) on the pump body (1), its characterized in that: the pilot valve (2) comprises a plunger (8), a spring (6), a screw plug (9) and a valve hole (5) formed in the pump body (1), the plunger (8) is integrally shaped like a Chinese character 'shi', and comprises a boss (8 a), a rod-shaped part (8 e), a large disc and a small disc (8 f) which are respectively arranged at two ends of the rod-shaped part (8 e), the large disc comprises a first end face (8 b) connected with the boss (8 a) and a second end face (8 d) connected with the rod-shaped part (8 e), two sides of the valve hole (5) are respectively provided with a first oil hole (11) and a second oil hole (7), the first oil hole (11) is not flush with the second oil hole (7), the first oil hole (11) is close to the second end face (8 d), the second oil hole (7) is close to the first end face (8 b), and the small disc oil hole (8 f) is located below the first oil hole (11), the inner wall of the valve hole (5) is provided with an annular groove (10) which is parallel and level to the second oil hole (7), and the pilot valve (2) is communicated with the variable control cavity (3) through the second oil hole (7).
2. The oil pump for reducing oil pressure drop according to claim 1, characterized in that: and a chamfer (8 c) is arranged on the side of the second end surface (8 d).
3. The oil pump for reducing oil pressure drop according to claim 2, characterized in that: the vertical height of the chamfer (8 c) is greater than the width of the ring groove (10).
4. The oil pump for reducing oil pressure drop according to claim 1, characterized in that: the width of the ring groove (10) is not more than the aperture of the second oil hole (7).
5. The oil pump for reducing oil pressure drop according to claim 1, characterized in that: the aperture of the first oil hole (11) is equal to the aperture of the second oil hole (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021665449.7U CN212745940U (en) | 2020-08-12 | 2020-08-12 | Oil pump for reducing oil pressure drop |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021665449.7U CN212745940U (en) | 2020-08-12 | 2020-08-12 | Oil pump for reducing oil pressure drop |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212745940U true CN212745940U (en) | 2021-03-19 |
Family
ID=74989314
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021665449.7U Active CN212745940U (en) | 2020-08-12 | 2020-08-12 | Oil pump for reducing oil pressure drop |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212745940U (en) |
-
2020
- 2020-08-12 CN CN202021665449.7U patent/CN212745940U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: No.69 Hengyue North Road, Chengguan Town, Hengdong County, Hengyang City, Hunan Province Patentee after: Hunan Meihu Intelligent Manufacturing Co.,Ltd. Country or region after: China Address before: No.69 Hengyue North Road, Chengguan Town, Hengdong County, Hengyang City, Hunan Province Patentee before: Hunan Oil Pump Co.,Ltd. Country or region before: China |
|
| CP03 | Change of name, title or address |