CN111306434A

CN111306434A - Lubricating system capable of lubricating oil pump during reverse rotation

Info

Publication number: CN111306434A
Application number: CN202010334096.0A
Authority: CN
Inventors: 黄小川; 许仲秋; 刘光明; 佘笑梅
Original assignee: Hunan Oil Pump Co Ltd
Current assignee: Hunan Oil Pump Co Ltd
Priority date: 2020-04-24
Filing date: 2020-04-24
Publication date: 2020-06-19

Abstract

The invention provides a lubricating system capable of lubricating an oil pump during reversal, which comprises an oil pan, an oil pump, an oil inlet channel and an oil outlet channel, wherein the oil pump comprises a pump body, a rotor cavity is arranged on the pump body, one side of the rotor cavity, which is communicated with the oil inlet channel, is a low-pressure area, one side of the rotor cavity, which is communicated with the oil outlet channel, is a high-pressure area, an oil outlet one-way valve is arranged on the oil outlet channel, an oil inlet one-way valve is arranged on the oil inlet channel, and the opening pressure of the oil outlet one-way valve is greater than; a bypass is arranged between the part of the oil inlet channel behind the oil inlet one-way valve and the high-pressure area of the rotor cavity, and a bypass one-way valve is mounted on the bypass; when the rotor rotates reversely under the driving of the rotating shaft, the low-pressure area and the high-pressure area of the rotor cavity are mutually switched, engine oil in the rotor cavity enters the bypass through the oil inlet channel under the operation of the rotor, opens the bypass one-way valve and then returns to the rotor cavity, and the engine oil circulates in such a way, so that a self-lubricating process during the reverse rotation of the oil pump is formed.

Description

Lubricating system capable of lubricating oil pump during reverse rotation

Technical Field

The invention relates to a transmission lubricating system, in particular to a lubricating system capable of lubricating an oil pump during reverse rotation.

Background

In a traditional internal combustion engine automobile, the reverse gear of the automobile is realized through a reverse gear mechanism of a gearbox. For a new energy automobile with a drive motor, the drive motor can rotate forwards and backwards, backing can be realized by utilizing the reverse rotation of the drive motor, and then an oil pump arranged on a gearbox has the problem of reverse rotation. However, in the process of backing a car, the oil pump is not required to pump pressure oil, the oil pump can suck air in the process of reversing, and long-time reversing operation can cause dry friction to running parts of the oil pump, such as accelerated temperature rise, poor lubrication and easy burnout of the oil pump, so that the service life of the oil pump is influenced.

Disclosure of Invention

The invention aims to provide a lubricating system capable of lubricating an oil pump during reverse rotation, and avoid the phenomenon of air suction during reverse rotation of the oil pump.

In order to solve the technical problems, the invention adopts the following technical scheme: a lubricating system capable of lubricating an oil pump during reverse rotation comprises an oil pan, an oil pump, an oil inlet channel and an oil outlet channel, wherein the oil pump comprises a pump body, a pump cover, a rotor and a rotating shaft, a rotor cavity is arranged on the pump body, the rotor is installed in the rotor cavity, one side of the rotor cavity, which is communicated with the oil inlet channel, is a low-pressure area, one side of the rotor cavity, which is communicated with the oil outlet channel, is a high-pressure area, an oil outlet one-way valve is installed on the oil outlet channel, an oil inlet one-way valve is installed on the oil inlet channel, and the opening pressure of the oil outlet one-way valve is greater; a bypass is arranged between the part of the oil inlet channel behind the oil inlet one-way valve and the high-pressure area of the rotor cavity, and a bypass one-way valve is mounted on the bypass; when the rotor rotates forward under the driving of the rotating shaft, engine oil in the oil pan is sucked into a low-pressure area of the rotor cavity through the oil inlet channel and then flows into a high-pressure area through the operation of the rotor, and the oil pressure in the high-pressure area can open the oil outlet one-way valve to discharge oil outwards; when the rotor rotates reversely under the driving of the rotating shaft, the low pressure area and the high pressure area of the rotor cavity are mutually switched, the engine oil in the rotor cavity enters the bypass through the oil inlet channel under the operation of the rotor, opens the bypass one-way valve and then returns to the rotor cavity, and the engine oil circulates in such a way.

Among the above-mentioned technical scheme, when the rotor reversal, the former high-pressure region in rotor chamber becomes the low-pressure region, because it is equipped with the check valve that produces oil to go out the oil duct, low-pressure oil can not be through the check valve that produces oil, can only flow to former low-pressure region along with the rotor operation, former low-pressure region becomes the high-pressure region, because the oil inlet duct is equipped with the oil feed check valve, high-pressure oil in the high-pressure region can only flow into the bypass and open the bypass check valve and flow back to the rotor intracavity again, just so form the self-lubricating process when the oil pump reversal, the phenomenon of inhaling appears when having.

Preferably, the cracking pressure of the bypass check valve is greater than the cracking pressure of the oil inlet check valve. Therefore, when the rotor rotates in the forward direction, part of oil flows into the bypass from the oil inlet channel and opens the bypass one-way valve to directly flow into a high-pressure area of the rotor cavity.

Preferably, the bypass is provided on the pump body of the oil pump.

Preferably, the oil inlet check valve, the oil outlet check valve and the bypass check valve are all steel ball valves.

Drawings

FIG. 1 is a schematic diagram of the overall structure of a lubrication system according to an embodiment of the present invention;

the reference signs are:

1-oil bottom shell 2-oil pump 3-oil inlet channel

31-oil inlet one-way valve 4-oil outlet channel 41-oil outlet one-way valve

5-bypass 51-bypass check valve.

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 preferred embodiment of the present invention is: a lubricating system capable of lubricating an oil pump during reverse rotation comprises an oil pan 1, an oil pump 2, an oil inlet channel 3 and an oil outlet channel 4, wherein the oil pump 2 comprises a pump body, a pump cover, a rotor and a rotating shaft, a rotor cavity is arranged on the pump body, the rotor is installed in the rotor cavity, one side of the rotor cavity, which is communicated with the oil inlet channel 3, is a low-pressure area, one side of the rotor cavity, which is communicated with the oil outlet channel 4, is a high-pressure area, an oil outlet one-way valve 41 is installed on the oil outlet channel 4, an oil inlet one-way valve 31 is installed on the oil inlet channel 3, and the opening pressure of the oil outlet one-way valve 41 is greater than; a bypass 5 is arranged between the part of an oil inlet channel behind the oil inlet check valve 31 and a high-pressure area of a rotor cavity, the bypass 5 is arranged on a pump body of the oil pump 2, a bypass check valve 51 is arranged on the bypass 5, and the opening pressure of the bypass check valve 51 is greater than that of the oil inlet check valve 31; the oil inlet check valve 31, the oil outlet check valve 41 and the bypass check valve 51 are all steel ball valves; when the rotor rotates forward under the drive of the rotating shaft, the engine oil in the oil pan 1 is sucked into the low-pressure area of the rotor cavity through the oil inlet channel 3 and then flows into the high-pressure area through the operation of the rotor, and the oil pressure in the high-pressure area can open the oil outlet one-way valve 41 to discharge oil outwards; when the rotor is driven by the rotating shaft to rotate reversely, the low pressure area and the high pressure area of the rotor cavity are switched, and the engine oil in the rotor cavity enters the bypass 5 through the oil inlet channel 3 under the operation of the rotor and opens the bypass check valve 51 and then returns to the rotor cavity, so that the engine oil circulates circularly.

Among the above-mentioned technical scheme, when the rotor reversal, the former high-pressure area in rotor chamber becomes the low-pressure area, because it is equipped with oil outlet check valve 41 to go out oil duct 4, low-pressure oil can not be through oil outlet check valve 41, only can flow to former low-pressure area along with the rotor operation, former low-pressure area becomes the high-pressure area, because oil inlet duct 3 is equipped with oil feed check valve 31, high-pressure oil in the high-pressure area can only flow into bypass 5 and open bypass check valve 51 and flow back to the rotor intracavity again, just so form the self-lubricating process when the oil pump reversal, the phenomenon of inhaling appears when having avoided the oil pump reversal.

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

1. The utility model provides a can lubricate lubricating system of oil pump during reversal, includes oil pan (1), oil pump (2), oil feed way (3), goes out oil duct (4), oil pump (1) includes the pump body, pump cover, rotor, pivot, be equipped with the rotor chamber on the pump body, the rotor is installed the rotor intracavity, the rotor chamber is the low-pressure area with communicating one side of oil feed way (3), the rotor chamber is high-pressure area with the communicating one side of going out oil duct (4), its characterized in that: an oil outlet one-way valve (41) is installed on the oil outlet channel (4), an oil inlet one-way valve (31) is installed on the oil inlet channel (3), and the opening pressure of the oil outlet one-way valve (41) is greater than the opening pressure of the oil inlet one-way valve (31); a bypass (5) is arranged between the part of the oil inlet channel behind the oil inlet check valve (31) and the high pressure area of the rotor cavity, and a bypass check valve (51) is installed on the bypass (5); when the rotor rotates forward under the driving of the rotating shaft, engine oil in the oil pan (1) is sucked into a low-pressure area of a rotor cavity through the oil inlet channel (3) and then flows into a high-pressure area through the operation of the rotor, and the oil pressure of the high-pressure area can open the oil outlet one-way valve (41) to discharge oil outwards; when the rotor is driven by the rotating shaft to rotate reversely, the low-pressure area and the high-pressure area of the rotor cavity are mutually switched, and the engine oil in the rotor cavity enters the bypass (5) through the oil inlet channel (3) under the operation of the rotor and opens the bypass check valve (51) and then returns to the rotor cavity, so that the engine oil circulates circularly.

2. The lubrication system for a lubricatable oil pump when reversed according to claim 1, wherein: the opening pressure of the bypass check valve (51) is larger than the opening pressure of the oil inlet check valve (31).

3. The lubrication system capable of lubricating an oil pump when reversed according to claim 1 or 2, characterized in that: the bypass (5) is arranged on the pump body of the oil pump (1).

4. The lubrication system capable of lubricating an oil pump when reversed according to claim 1 or 2, characterized in that: the oil inlet check valve (31), the oil outlet check valve (41) and the bypass check valve (51) are all steel ball valves.