CN215633734U - Oil pump - Google Patents

Oil pump Download PDF

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Publication number
CN215633734U
CN215633734U CN202120990841.7U CN202120990841U CN215633734U CN 215633734 U CN215633734 U CN 215633734U CN 202120990841 U CN202120990841 U CN 202120990841U CN 215633734 U CN215633734 U CN 215633734U
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CN
China
Prior art keywords
piston
oil
pump
oil pump
cavity
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Active
Application number
CN202120990841.7U
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Chinese (zh)
Inventor
孙学明
韩景峰
蒋丽媛
房佳威
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Weichai Power Co Ltd
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Weichai Power Co Ltd
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Priority to CN202120990841.7U priority Critical patent/CN215633734U/en
Application granted granted Critical
Publication of CN215633734U publication Critical patent/CN215633734U/en
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Abstract

The utility model discloses an oil pump, and relates to the technical field of oil pumps. The oil pump comprises a pump body and an oil pressure adjusting device, wherein the oil pressure adjusting device comprises a piston body, a piston and an elastic piece, the piston body is arranged on the pump body and is provided with a piston cavity communicated with an oil outlet cavity of the oil pump, the piston and the elastic piece are arranged in the piston cavity, the piston adjusts the volume of a part, communicated with the oil outlet cavity, of the piston cavity by moving in the piston cavity, and the elastic piece is used for providing elastic restoring force for the piston. The oil pump of the utility model achieves the purposes of reducing the oil pressure fluctuation of the oil pump and keeping the oil pressure in the oil outlet cavity of the oil pump stable, thereby ensuring the working stability of the oil pump.

Description

Oil pump
Technical Field
The utility model relates to the technical field of oil pumps, in particular to an oil pump.
Background
At present, most of oil pumps are rotor type oil pumps and gear type oil pumps, the working principle of the two oil pumps is to output high-pressure oil through gear engagement, and large oil pressure fluctuation is inevitably generated during oil discharge due to the fact that gears with high rotating speeds are engaged and the rotating speed fluctuation of the oil pumps is added.
The disadvantage of the oil pressure fluctuation: 1. the engine oil pressure fluctuation is large, and the energy consumption is high; 2. the great oil pressure fluctuation promotes the failure of the centrifugal filter, the oil filter and the oil cooler; 3. and the oil leakage failure probability of the sealing surface is increased. Therefore, the engine oil pressure fluctuation of the engine oil pump is reduced, the working stability of the engine oil pump is ensured, and the engine oil pump is very important for improving the performance of the engine.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects in the prior art, the utility model provides the oil pump, which reduces the pressure fluctuation of the oil, ensures that the oil pressure in the oil outlet cavity of the oil pump can be kept stable, and ensures the working stability of the oil pump.
In order to solve the technical problems, the utility model adopts the technical scheme that:
the oil pump comprises a pump body and an oil pressure adjusting device, wherein the oil pressure adjusting device comprises a piston body, a piston and an elastic piece, the piston body is arranged on the pump body and is provided with a piston cavity communicated with an oil outlet cavity of the oil pump, the piston and the elastic piece are arranged in the piston cavity, the piston adjusts the volume of a part, communicated with the oil outlet cavity, of the piston cavity by moving in the piston cavity, and the elastic piece is used for providing elastic restoring force for the piston.
The piston body comprises a piston body arranged on the pump body and a plug screw arranged at the end part of the piston body, and the elastic piece is positioned between the piston and the plug screw.
And an oil drainage hole communicated with the piston cavity is formed in the screw plug.
Wherein, the piston body with pump body an organic whole sets up.
Wherein, the piston is a ball plug.
Wherein the piston is a plunger.
The oil outlet cavity is arranged in the oil outlet cavity, the oil outlet cavity is communicated with the oil inlet cavity, the oil outlet cavity is communicated with the oil outlet cavity, and the oil outlet cavity is communicated with the oil outlet cavity.
The oil pump is a gear type oil pump.
The oil pump is a rotor type oil pump.
By adopting the technical scheme, the utility model has the beneficial effects that:
according to the oil pump provided by the utility model, when the oil pressure in the oil outlet cavity fluctuates towards high pressure, the piston compresses the elastic piece to increase the volume of the part of the piston cavity communicated with the oil outlet cavity so as to release higher oil pressure; when the engine oil pressure in the oil outlet cavity fluctuates towards low pressure, the elastic part releases potential energy to drive the piston to reset so that the volume of the part of the piston cavity communicated with the oil outlet cavity is reduced, and the engine oil pressure in the oil outlet cavity is ensured to be in a proper range.
Drawings
FIG. 1 is a schematic view of the construction of an oil pump of the present invention;
FIG. 2 is a schematic view of the other side of FIG. 1;
FIG. 3 is a cross-sectional view of FIG. 1;
in the figure: 1. a pump body; 2. a piston body; 21. a piston cavity; 22. a piston body; 23. a plug screw; 231. an oil drainage hole; 3. a piston; 4. an elastic member; 5. an oil outlet cavity; 6. a pump cover; 61. an oil inlet; 62. an oil outlet; 7. a driving gear shaft; 8. a driven gear shaft; 9. a driving gear; 10. a driven gear; 11. a drive gear; 12. an oil inlet cavity; 13. and (4) releasing the valve.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
As shown in fig. 1 to 3, the oil pump includes a pump body 1, and further includes an oil pressure adjusting device, the oil pressure adjusting device includes a piston body 2, a piston 3, and an elastic member 4, the piston body 2 is disposed on the pump body 1, the piston body 2 has a piston cavity 21 communicated with an oil outlet cavity 5 of the oil pump, the piston 3 and the elastic member 4 are disposed in the piston cavity 21, the piston 3 adjusts a volume of a portion where the piston cavity 21 is communicated with the oil outlet cavity 5 by moving in the piston cavity 21, and the elastic member 4 is configured to provide an elastic restoring force to the piston 3.
The piston body 2 in this embodiment includes a piston body 22 provided on the pump body 1 and a plug screw 23 provided at an end of the piston body 22, and the elastic member 4 is located between the piston 3 and the plug screw 23.
In this embodiment, the clearance between the piston 3 and the cavity wall of the piston cavity 21 is very small, the amount of leaked engine oil is very small, and the influence on the power of the engine oil pump is negligible.
In order to ensure the normal operation of the oil pressure adjusting device, the present embodiment provides the drain hole 231 communicating with the piston chamber 21 on the plug screw 23, so that the leaked oil can be leaked from the drain hole 231 into the oil pan of the engine.
In order to ensure the connection strength between the piston body 22 and the pump body 1, the piston body 22 and the pump body 1 are preferably integrally formed by casting in this embodiment.
Because the ball plug is flexible and convenient to use, the piston 3 in the embodiment is preferably a ball plug, and the ball plug is a wear-resistant ball plug with low mass.
The elastic member 4 in this embodiment is preferably a spring because of its good elastic expansion and contraction capability.
The oil pump in the embodiment is a gear type oil pump, and in practical application, the oil pump can also be a rotor type oil pump, the oil pump in the embodiment further comprises a pump cover 6, a driving gear shaft 7, a driven gear shaft 8, a driving gear 9, a driven gear 10 and a driving gear 11, wherein the pump cover 6 is detachably arranged on the pump body 1, the driving gear shaft 7 and the driven gear shaft 8 are respectively and rotatably arranged on the pump body 1 and the pump cover 6, and one end of the driving gear shaft 7 extends out of the pump body 1 and is connected with the driving gear 11; the driving gear 9 and the driven gear 10 are positioned in the pump body 1 and the pump cover 6, the driving gear 9 is arranged on the driving gear shaft 7, the driven gear 10 is arranged on the driven gear shaft 8, and the driving gear 9 is meshed with the driven gear 10; one side of the driving gear 9 and one side of the driven gear 10 are provided with an oil inlet cavity 12, and the pump cover 6 is provided with an oil inlet 61 communicated with the oil inlet cavity 12; the other side of the driving gear 9 and the driven gear 10 is an oil outlet cavity 5, and the pump cover 6 is provided with an oil outlet 62 communicated with the oil outlet cavity 5.
In this embodiment, the pump body 1 is further provided with a pressure relief valve 13 for adjusting the engine oil pressure in the oil outlet chamber 5, and the pressure relief valve 13 can be automatically opened and closed according to the engine oil pressure in the oil outlet chamber 5, so as to ensure the safety of the engine oil pump.
When the engine oil pressure in the oil outlet cavity 5 fluctuates towards high pressure, the piston 3 compresses the elastic piece 4 to increase the volume of the part of the piston cavity 21 communicated with the oil outlet cavity 5 so as to release higher engine oil pressure; when the engine oil pressure in the oil outlet cavity 5 fluctuates towards low pressure, the elastic part 4 releases potential energy to drive the piston 3 to reset, so that the volume of the part of the piston cavity 21 communicated with the oil outlet cavity 5 is reduced, and the engine oil pressure in the oil outlet cavity 5 is ensured to be in a proper range; when the oil pressure in the oil outlet cavity 5 exceeds the set pressure of the pressure release valve 13, the pressure release valve 13 is automatically opened to release pressure, so that the safety of the oil pump is ensured, and accidents are prevented.
In summary, in the oil pump of the embodiment, the volume of the part of the piston cavity 21 communicated with the oil outlet cavity 5 is adjusted by the movement of the piston 3 in the piston cavity 21, so that the purpose of reducing the oil pressure fluctuation of the oil pump and keeping the oil pressure in the oil outlet cavity 5 stable is achieved, and the working stability of the oil pump is ensured.
The present invention is not limited to the above-described embodiments, and those skilled in the art will be able to make various modifications without departing from the spirit and scope of the present invention.

Claims (9)

1. The oil pump comprises a pump body and is characterized by also comprising an oil pressure adjusting device,
the engine oil pressure adjusting device comprises a piston body, a piston and an elastic piece, wherein the piston body is arranged on the pump body, the piston body is provided with a piston cavity communicated with an oil outlet cavity of the engine oil pump, the piston and the elastic piece are arranged in the piston cavity, the piston adjusts the volume of a part, communicated with the oil outlet cavity, of the piston cavity by moving in the piston cavity, and the elastic piece is used for providing elastic restoring force for the piston.
2. The oil pump of claim 1, wherein the piston body includes a piston body provided on the pump body and a plug screw provided at an end of the piston body, the elastic member being located between the piston and the plug screw.
3. The oil pump of claim 2, wherein the plug is provided with a drain hole communicating with the piston cavity.
4. The oil pump of claim 2, wherein the piston body is integrally provided with the pump body.
5. The oil pump of claim 1, wherein the piston is a ball plunger.
6. The oil pump of claim 1, wherein the piston is a plunger.
7. The oil pump according to any one of claims 1 to 6, wherein a pressure relief valve for adjusting the oil pressure of the oil outlet chamber is further provided on the pump body, and the pressure relief valve is automatically opened and closed according to the oil pressure of the oil outlet chamber.
8. The oil pump of claim 7, wherein the oil pump is a gear-type oil pump.
9. The oil pump of claim 7, wherein the oil pump is a rotor type oil pump.
CN202120990841.7U 2021-05-10 2021-05-10 Oil pump Active CN215633734U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202120990841.7U CN215633734U (en) 2021-05-10 2021-05-10 Oil pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202120990841.7U CN215633734U (en) 2021-05-10 2021-05-10 Oil pump

Publications (1)

Publication Number Publication Date
CN215633734U true CN215633734U (en) 2022-01-25

Family

ID=79937852

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202120990841.7U Active CN215633734U (en) 2021-05-10 2021-05-10 Oil pump

Country Status (1)

Country Link
CN (1) CN215633734U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115306708A (en) * 2022-08-23 2022-11-08 曲阜市正成机械科技有限公司 Special-shaped gear pump shell casting assembly and machining, casting and forming process and system thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115306708A (en) * 2022-08-23 2022-11-08 曲阜市正成机械科技有限公司 Special-shaped gear pump shell casting assembly and machining, casting and forming process and system thereof

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