Durability test mechanism and test method of oil pump in gas-containing oil

Abstract

The present invention discloses a durability testing mechanism and a testing method for an oil pump in gas-containing oil, the testing mechanism comprising: a controller; a main oil tank for a test bench; a small forward oil tank, the small forward oil tank being connected to the main oil tank for the test bench; a small reverse oil tank, the oil in the small reverse oil tank and the small forward oil tank being exchanged by driving a motor to rotate forward and reversely; an oil branch, the oil branch being a branch formed by extracting the oil in the main oil tank for the test bench and injecting it into the small forward oil tank; an air supply branch, the air supply branch being connected to the oil branch and ventilating the oil branch; a gearbox oil pump to be tested being connected to a driving motor, and one end of the gearbox oil pump to be tested being connected to the small forward oil tank, and the other end being connected to the small reverse oil tank. The use of the testing mechanism and the corresponding testing method can better simulate the reliability and durability verification of the transmission oil pump when the vehicle is working in reverse, and ensure the safe and stable operation of the vehicle.

Description

Technical Field

[0001] The invention relates to the technical field of pump performance detection, and in particular to a durability testing mechanism and a testing method for an oil pump in gas-containing oil. Background Art

[0002] This year, the number of cars in the world has risen rapidly, and the energy and environmental issues caused by this have attracted the attention of various countries. Governments have successively issued regulations and measures to limit automobile emissions and encourage the development of new energy vehicles. Due to the advantages of pure electric vehicles and their ease in meeting emission requirements, many automobile manufacturers regard their research and development as an important development content. Pure electric vehicles do not have engines. If the speed needs to be changed during driving, it can only be achieved through transmission and operating mechanisms such as transmission gears. The transmission is composed of gear transmission mechanisms or operating mechanisms. The transmission oil pump provides lubrication for the meshing of various mechanisms and cools the heat generated by friction. It is an important functional part of the transmission.

[0003] However, the oil pump has the problem of reduced efficiency after working for a long time. Since the oil pump is always in working state during the driving of the car, there is a certain amount of air in the gearbox. The oil pump works in the oil containing air for a long time, and the oil pump is prone to gas corrosion, which leads to reduced efficiency of the oil pump. In the subsequent work, the oil pump cannot fully supply oil or the oil pump is directly damaged, resulting in loss of oil supply function, thus affecting the normal driving of the car on the road.

[0004] Therefore, in order to ensure better performance of the gearbox, the oil pump is generally tested on a performance test bench before leaving the factory to ensure the quality of the product. How to design a simple-to-operate test bench and a realistic simulation of the working environment of the oil pump is an urgent problem to be solved. Summary of the invention

[0005] In view of the above-mentioned problems existing in the prior art, the present invention aims to provide a professional, reliable and easy-to-operate durability testing mechanism and method for oil pumps in gas-containing oil, which can better simulate the reliability and durability verification of the transmission oil pump when the vehicle works in reverse, and ensure the safe and stable operation of the vehicle.

[0006] The specific technical solutions are as follows:

[0007] First, a durability test mechanism for an oil pump in gas-containing oil is provided, comprising: a controller, which is the main control end of the test mechanism; a test bench main oil tank, which simulates the working oil temperature of an automobile gearbox and realizes temperature control; a forward small oil tank, which is connected to the test bench main oil tank; a reverse small oil tank, in which the oil in the reverse small oil tank and the forward small oil tank is exchanged with the oil through the forward and reverse rotation of a driving motor; an oil branch, which is a branch formed by extracting the oil in the test bench main oil tank and injecting it into the forward small oil tank; an air supply branch, which is connected to the oil branch and ventilates the oil branch; a gearbox oil pump to be tested is connected to the driving motor, and one end of the gearbox oil pump to be tested is connected to the forward small oil tank, and the other end is connected to the reverse small oil tank.

[0008] Preferably, the oil branch includes an auxiliary oil pump, one end of the auxiliary oil pump is connected to the small forward oil tank, and the other end of the auxiliary oil pump is connected to the main oil tank of the test bench.

[0009] Preferably, a liquid pressure sensor, a liquid pressure regulating valve and a liquid flow meter are provided on the oil branch line between the auxiliary oil pump and the small forward oil tank.

[0010] Preferably, the air supply branch is supplied with air by an external air pump, and the air outlet end of the air supply branch is connected to the oil branch between the auxiliary oil pump and the main oil tank of the test bench.

[0011] Preferably, the gas supplement branch includes a gas pressure sensor, a gas pressure regulating valve and a gas flow meter.

[0012] Preferably, a one-way valve is provided at the gas outlet end of the gas supplement branch.

[0013] Preferably, an oil pump pressure sensor and an oil pump pressure regulating valve are connected between the forward small oil tank and the reverse small oil tank.

[0014] Preferably, the temperature of the main oil tank of the test bench is controlled by a mold temperature controller.

[0015] Secondly, a method for testing the durability of an oil pump in gas-containing oil is provided, comprising the following steps:

[0016] 1) The temperature of the main oil tank of the test bench can be controlled by controlling the mold temperature controller through the controller, and the oil in the main oil tank of the test bench is heated to the target temperature;

[0017] 2) Turn on the auxiliary oil pump and pump the oil in the main oil tank of the test bench into the small forward oil tank. When the small forward oil tank is full of oil, the oil overflows and falls back into the main oil tank of the test bench;

[0018] 3) Adjust the opening of the oil pressure regulating valve to achieve the target flow rate required by the auxiliary oil pump;

[0019] 4) Control the drive motor to provide a driving power source to the gearbox oil pump to be tested, so that the gearbox oil pump operates to the target speed, and then adjust the opening of the oil pump pressure regulating valve to make the gearbox oil pump pump out pressure reach the required lubricating oil pressure and flow resistance information;

[0020] 5) Open the gas pressure regulating valve to provide a certain amount of gas to the oil branch, and adjust the opening of the gas pressure regulating valve to achieve the target flow rate of the liquid flow meter after the oil and gas are mixed;

[0021] 6) The target speed and operation cycle of the drive motor are set through the controller. When the drive motor is set to run in the forward direction for a certain period of time, the gearbox oil pump pumps the oil in the forward small oil tank to the reverse small oil tank to fill it up. Then, the drive motor is controlled to reverse for a certain period of time to just suck out the oil in the reverse small oil tank, and the forward and reverse operations are cycled periodically.

[0022] Preferably, in step 5, a dedicated gas concentration detector is used to monitor the gas concentration percentage in the oil-gas mixture pumped out after the liquid pressure regulating valve to detect the oil-gas mixture content.

[0023] The positive effects of the above technical solution are:

[0024] 1) The present invention adds gas to the oil through an external air pump, so that the oil contains a certain proportion of gas, so that the gearbox oil pump to be tested contacts the gas-containing oil when working, truly simulating the working condition of the oil pump, thereby obtaining a more realistic test result, providing a direction for solving the problem for research and development, and ultimately ensuring the factory quality of the gearbox oil pump;

[0025] 2) In the present invention, the auxiliary oil pump is operated to extract the oil in the main oil tank of the test bench as one path, namely the oil branch; the other path, namely the air supply branch, directly fills the oil branch with gas, and controls the air intake speed through the gas pressure regulating valve, thereby controlling the gas content in the oil;

[0026] 3) In the present invention, the flow rate and pressure of the gas-containing oil are controlled by adjusting the liquid pressure regulating valve, so that the gas-containing oil enters the small forward oil tank with a temperature sensor at a certain speed;

[0027] 4) The oil-gas mixture content is detected by monitoring the gas concentration percentage in the oil-gas mixture pumped out after the liquid pressure regulating valve through a dedicated gas concentration detector. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the connection structure of the durability testing mechanism of the oil pump in gas-containing oil liquid of the present invention.

[0029] In the attached figure, 1. main oil tank of the test bench; 2. small forward oil tank; 3. small reverse oil tank; 4. driving motor; 5. gearbox oil pump; 6. auxiliary oil pump; 7. liquid pressure sensor; 8. liquid pressure regulating valve; 9. liquid flow meter; 10. gas pressure sensor; 11. gas pressure regulating valve; 12. gas flow meter; 13. non-return valve; 14. oil pump pressure sensor; 15. oil pump pressure regulating valve; 16. filter. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] like Figure 1 As shown, a durability test mechanism of an oil pump in gas-containing oil is shown, including a controller, a test bench main oil tank 1, a forward small oil tank 2, a reverse small oil tank 3, an oil branch, and an air supply branch. Among them, the controller is the master control end of the test mechanism, which controls the normal automatic test of the test mechanism. The test bench main oil tank 1 simulates the working oil temperature of the automobile gearbox and realizes temperature control. The forward small oil tank 2 is connected to the test bench main oil tank 1; the reverse small oil tank 3, the oil in the reverse small oil tank 3 and the forward small oil tank 2 is exchanged through the forward and reverse rotation of the driving motor 4. Specifically, the gearbox oil pump 5 to be tested is connected to the driving motor 4, and one end of the gearbox oil pump 5 to be tested is connected to the forward small oil tank 2, and the other end is connected to the reverse small oil tank 3. Therefore, when the driving motor 4 drives the gearbox oil pump 5 to be tested to work, the forward and reverse rotation of the driving motor 4 can realize the oil exchange between the forward small oil tank 2 and the reverse small oil tank 3. The oil branch is a branch formed by extracting the oil from the main oil tank 1 of the test bench and injecting it into the small forward oil tank 2; the air supply branch is connected to the oil branch and ventilates the oil branch to simulate the real working environment of the oil pump. After working for a long time, the oil contains air, which improves the reliability of the performance test of the transmission oil pump 5.

[0032] Specifically, that is to say, the present invention provides a durability test mechanism for an oil pump in an oil containing gas. In the test bench, a main oil tank 1 is provided. The main oil tank 1 is connected to a mold temperature controller. Its temperature is controlled by a master control end, i.e., a controller, to simulate the actual working oil temperature of a car gearbox. A small forward oil tank 2 is provided above the main oil tank 1. The oil exchange between the small forward oil tank 2 and the main oil tank 1 is realized through an oil branch. In order to simulate the actual oil working environment, an air supply branch is added to the oil branch. The air pump introduces air into the oil branch through the air supply branch, so that the oil entering the small forward oil tank 2 contains air. The gearbox oil pump 5 to be tested is connected to the small forward oil tank 2. The gearbox oil pump 5 to be tested is also connected to a drive motor 4. The forward and reverse rotation of the drive motor 4 drives it to work. Therefore, the other end of the gearbox oil pump 5 is connected to a small reverse oil tank. The oil exchange between the small forward oil tank 2 and the reverse small oil tank 3 is realized by the forward and reverse rotation of the drive motor 4.

[0033] More specifically, the oil branch includes an auxiliary oil pump 6, one end of which is connected to the small forward oil tank 2, and the other end of which is connected to the main oil tank 1 of the platform. The oil in the main oil tank 1 of the platform is pumped into the small forward oil tank 2 through the auxiliary oil pump 6. In order to better monitor the oil pressure and oil flow in the oil branch, a liquid pressure sensor 7, a liquid pressure regulating valve 8 and a liquid flow meter 9 are provided on the oil branch between the auxiliary oil pump 6 and the small forward oil tank 2. By adjusting the liquid pressure valve, the oil pressure and flow of the oil branch can be adjusted to meet the demand.

[0034] The air supply branch is supplied with air by an external air pump, and the outlet end of the air supply branch is connected to the oil branch between the auxiliary oil pump 6 and the main oil tank 1 of the test bench. The air supply branch includes a gas pressure sensor 10, a gas pressure regulating valve 11 and a gas flow meter 12. The gas pressure regulation and gas flow regulation of the air supply branch are achieved by adjusting the opening of the gas pressure regulating valve 11. In order to enable the air supply branch to better replenish air into the oil branch and prevent gas reflux, a one-way valve 13 is provided at the outlet end of the air supply branch, which also prevents oil from entering the air supply branch.

[0035] In addition, an oil pump pressure sensor 14 and an oil pump pressure regulating valve 15 are connected between the forward small oil tank 2 and the reverse small oil tank 3. The oil pump pressure regulating valve 15 is adjusted to realize the oil pump pressure between the forward small oil tank 2 and the reverse small oil tank 3 when the drive motor 4 rotates forward and reversely.

[0036] The present invention also provides a method for testing the durability of an oil pump in gas-containing oil, comprising the following steps:

[0037] 1) The temperature of the main oil tank 1 of the test bench is controlled by the controller to heat the oil in the main oil tank 1 of the test bench to the target temperature;

[0038] 2) Turn on the auxiliary oil pump 6, and pump the oil heated to the target temperature in the main oil tank 1 of the test bench to the small forward oil tank 2 (with a temperature sensor arranged therein), and wait for the small forward oil tank 2 to be filled with oil and overflow and fall back into the main oil tank 1 of the test bench, so as to achieve the oil temperature balance between the main oil tank 1 of the test bench and the small forward oil tank 2;

[0039] 3) Adjust the opening of the oil pressure regulating valve to achieve the required target flow rate of the auxiliary oil pump 6;

[0040] 4) Control the drive motor 4 to provide a driving power source to the gearbox oil pump 5 to be tested, so that the gearbox oil pump 5 operates to the target speed, and then adjust the opening of the oil pump pressure regulating valve 15 so that the pumping pressure of the gearbox oil pump 5 reaches the lubricating oil pressure and flow resistance information that meet the requirements;

[0041] 5) Open the gas pressure regulating valve 11 to provide a certain amount of gas to the oil branch, and adjust the opening of the gas pressure regulating valve 11 to achieve the target flow rate of the oil and gas mixture in the liquid flow meter 9; or a dedicated gas concentration detector can be used to monitor the gas concentration percentage in the oil and gas mixture pumped out after the liquid pressure regulating valve 8 to detect the oil and gas mixture content;

[0042] 6) The target speed and operation cycle of the drive motor 4 are set through the controller. When the drive motor 4 is set to run in the forward direction for a certain period of time, the gearbox oil pump 5 pumps the oil in the forward small oil tank 2 to the reverse small oil tank 3 to fill it up. Then, the drive motor 4 is controlled to reverse for a certain period of time to just suck out the oil in the reverse small oil tank 3, so that the filter 16 is exposed to the air, and the forward and reverse operations are cycled periodically.

[0043] Also, during this test, attention should be paid to the replenishment of the oil in the test bench main oil tank 1 to ensure normal testing.

[0044] In summary, the test method includes the oil circuit and the gas circuit. The oil circuit direction: the auxiliary oil pump 6 extracts the oil in the main oil tank 1 of the test bench and pumps it into the small forward oil tank 2; the gas circuit direction: the gas pressure regulating valve 11 controls the degree of oil and gas mixing, and the one-way valve 13 prevents gas reflux and oil from entering the gas circuit. This test method effectively verifies the long-term working condition of the oil pump in the working environment containing gas and oil, and provides a direction for solving problems for research and development.

[0045] The above are only preferred embodiments of the present invention, and are not intended to limit the implementation methods and protection scope of the present invention. Those skilled in the art should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A durability test mechanism for an oil pump in gas-containing oil, characterized in that: include: A controller, which is the main control terminal of the test mechanism; A test bench main oil tank (1), wherein the test bench main oil tank (1) simulates the working oil temperature of an automobile gearbox and realizes temperature control; A small forward oil tank (2), the small forward oil tank (2) being connected to the main oil tank (1) of the platform, and the oil in the small forward oil tank (2) can overflow and fall back into the main oil tank (1) of the platform after being filled; A reverse small oil tank (3), wherein the oil in the reverse small oil tank (3) and the forward small oil tank (2) are exchanged with each other through the forward and reverse rotation of the driving motor (4); An oil branch, wherein the oil branch is formed by extracting oil from the platform main oil tank (1) and injecting it into the forward small oil tank (2); An air supply branch, the air supply branch is connected to the oil branch and ventilates the oil branch; The gearbox oil pump (5) to be tested is connected to the drive motor (4), and one end of the gearbox oil pump (5) to be tested is connected to the forward small oil tank (2), and the other end is connected to the reverse small oil tank (3).

2. The durability testing mechanism for an oil pump in gas-containing oil according to claim 1, characterized in that: The oil branch circuit comprises an auxiliary oil pump (6), one end of which is connected to the small forward oil tank (2), and the other end of which is connected to the main oil tank (1) of the platform.

3. The durability testing mechanism for oil pumps in gas-containing oil according to claim 2, characterized in that: A liquid pressure sensor (7), a liquid pressure regulating valve (8) and a liquid flow meter (9) are provided on the oil branch line between the auxiliary oil pump (6) and the small forward oil tank (2).

4. The durability testing mechanism for oil pumps in gas-containing oil according to claim 3, characterized in that: The air supply branch is supplied with air by an external air pump, and the air outlet end of the air supply branch is connected to the oil branch between the auxiliary oil pump (6) and the main oil tank (1) of the platform.

5. The durability testing mechanism for oil pumps in gas-containing oil according to claim 4, characterized in that: The gas supplement branch comprises a gas pressure sensor (10), a gas pressure regulating valve (11) and a gas flow meter (12).

6. The durability testing mechanism for oil pumps in gas-containing oil according to claim 5, characterized in that: A one-way valve (13) is provided at the gas outlet end of the gas supply branch.

7. The durability testing mechanism for oil pumps in gas-containing oil according to claim 6, characterized in that: An oil pump pressure sensor (14) and an oil pump pressure regulating valve (15) are connected between the forward rotation small oil tank (2) and the reverse rotation small oil tank (3).

8. The durability testing mechanism for oil pumps in gas-containing oil according to claim 7, characterized in that: The temperature of the platform main oil tank (1) is controlled by a mold temperature controller.

9. A method for testing the durability of an oil pump in aerated oil as claimed in claim 8, characterized in that: The steps include: 1) controlling the mold temperature controller through a controller to achieve temperature control of the main oil tank (1) of the test bench, and heating the oil in the main oil tank (1) of the test bench to a target temperature; 2) Turn on the auxiliary oil pump (6) to pump the oil in the main oil tank (1) of the platform into the small forward oil tank (2), and wait until the small forward oil tank (2) is full of oil and the oil overflows and falls back into the main oil tank (1) of the platform; 3) adjusting the opening of the oil pressure regulating valve to achieve the required target flow rate of the auxiliary oil pump (6); 4) controlling the driving motor (4) to provide a driving power source to the gearbox oil pump (5) to be tested, so that the gearbox oil pump (5) operates to a target speed, and then adjusting the opening of the oil pump pressure regulating valve (15) so that the pumping pressure of the gearbox oil pump (5) reaches the lubricating oil pressure and flow resistance information that meet the requirements; 5) Open the gas pressure regulating valve (11) to provide a certain amount of gas to the oil branch, and adjust the opening of the gas pressure regulating valve (11) to achieve the target flow rate of the liquid flow meter (9) after the oil and gas are mixed; 6) The target speed and operation cycle of the drive motor (4) are set by the controller. When the drive motor (4) is set to run in the forward direction for a certain period of time, the gearbox oil pump (5) pumps the oil in the forward small oil tank (2) to fill the reverse small oil tank (3). Then, the drive motor (4) is controlled to reverse for a certain period of time to just suck out the oil in the reverse small oil tank (3), and the forward and reverse operations are cyclically cycled.

10. A method for testing the durability of an oil pump in gas-containing oil according to claim 9, characterized in that: In step 5, a dedicated gas concentration detector is used to monitor the gas concentration percentage in the oil-gas mixture pumped out after the liquid pressure regulating valve (8) to detect the oil-gas mixture content.

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