Small oil pump motor performance testing device and method

Abstract

The invention discloses a small oil pump motor performance testing device and method, and belongs to the technical field of motor performance testing. The fan adjusting unit is installed on the supporting platform and drives a fan to be close to or away from the motor testing unit through a linear motion module; the motor testing unit comprises a motor oil immersion platform, a coupler, a dynamometer and a to-be-tested oil pump motor, the motor oil immersion platform comprises a mounting seat, an oil tank and a pipeline, the mounting seat is connected with the supporting platform, the to-be-tested oil pump motor and the oil tank are both connected with the mounting seat, and an output shaft of the to-be-tested oil pump motor is immersed in the oil tank; the center line of the output shaft of the oil pump motor to be tested is kept flush with the liquid level of oil in the oil tank, the pipeline is locally arranged in the oil tank, the output shaft of the oil pump motor to be tested is further connected with the output shaft of the dynamometer through the coupler, and rotation speed control or torque control tests of the oil pump motor to be tested can be carried out under different working conditions. The device can realize multi-performance index test, and is high in test precision and good in universality.

Description

Technical Field

[0001] This invention belongs to the field of motor performance testing technology, specifically relating to a small oil pump motor performance testing device and method. Background Technology

[0002] Motor performance testing is crucial for evaluating the operating status, efficiency, and reliability of motors, and is widely used in industrial manufacturing, automotive, and energy sectors. Current motor performance testing primarily focuses on medium and large-sized motor testing platforms, including single-axis, dual-axis, and three-axis drive motor testing platforms. Oil temperature control in these platforms typically involves injecting heated lubricating oil into the motor via a lubricating oil temperature control device to achieve overall motor oil temperature control. However, since small oil pump motors are usually used in conjunction with the pump body to form a complete power unit, providing rotational power to the pump to transport oil, medium and large-sized motor testing platforms are not suitable for small oil pump motors.

[0003] In addition, existing motor testing platforms have the following shortcomings: 1) They only support single performance index testing, and the interfaces and fixing methods of different motor models vary greatly, resulting in poor versatility and reduced testing flexibility. This is especially true during the motor R&D stage, where there are many requirements for testing conditions, such as wind speed, ambient temperature, and oil temperature; 2) They lack an effective sealing mechanism, making them susceptible to interference from external environmental factors (such as humidity and particulate matter), which can affect test results, impacting test reliability and accuracy. Therefore, to meet the testing needs of small motors, a performance testing device and method for small oil pump motors are proposed. Summary of the Invention

[0004] The purpose of this invention is to address the above-mentioned problems by proposing a small oil pump motor performance testing device and method, which can perform multi-performance index testing with high accuracy and good versatility.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] This invention proposes a small oil pump motor performance testing device, comprising a support platform, a fan adjustment unit, and a motor testing unit, wherein:

[0007] The fan adjustment unit, mounted on the support platform, includes a linear motion module and a fan. The linear motion module is used to drive the fan closer to or further away from the motor test unit.

[0008] The motor testing unit includes a motor oil immersion platform, a coupling, a dynamometer, and a motor to be tested (the oil pump motor). The motor oil immersion platform includes a mounting base, an oil tank, and pipes. The mounting base is connected to a support platform. Both the oil pump motor to be tested and the oil tank are connected to the mounting base. The output shaft of the oil pump motor to be tested is immersed in the oil tank, and the center line of the output shaft of the oil pump motor to be tested is kept flush with the oil level in the oil tank. The pipes are partially built into the oil tank and used for fluid circulation to regulate the temperature of the oil in the tank. The output shaft of the oil pump motor to be tested is also connected to the output shaft of the dynamometer via a coupling.

[0009] Preferably, the support platform includes several telescopic legs and a truss, with the truss connected to each telescopic leg, and the height of the truss adjusted by the telescopic legs.

[0010] Preferably, the fan is positioned close to the side of the motor test unit where the oil pump motor under test is located, and the fan shaft is coaxial with the output shaft of the oil pump motor under test.

[0011] Preferably, the motor immersion platform further includes a bushing, a drive shaft, and a support base. The output shaft of the oil pump motor under test is coaxially connected to the drive shaft through the bushing. After passing through the oil tank, the drive shaft is connected to the output shaft of the dynamometer through a coupling. The support base is built into the oil tank and rotatably connected to the drive shaft.

[0012] Preferably, the motor testing unit also includes an environmental chamber, in which a fan and a motor immersion oil platform are built.

[0013] Preferably, the motor immersion platform also includes a level gauge for observing the level of oil in the oil tank.

[0014] Preferably, the main body of the pipeline is a U-shaped spiral metal pipe, and both ends are straight pipe sections extending outside the oil tank. The liquid inside the pipeline is water or ethylene glycol coolant.

[0015] Preferably, the motor testing unit further includes a temperature sensor and a speed and torque sensor. The temperature sensor is installed on the oil pump motor under test, and the speed and torque sensor is installed on the coupling.

[0016] Preferably, the dynamometer is a servo motor.

[0017] Preferably, the performance testing method for a small oil pump motor includes the following steps:

[0018] S1. Power on the small oil pump motor performance testing device and set up several test points under different operating conditions. These conditions include the temperature of the oil in the tank, the ambient temperature, the fan speed, and the speed, torque, and voltage of the oil pump motor under test. The oil temperature range is -30℃ to +130℃, the ambient temperature range is -40℃ to +110℃, the fan speed range is 1m / s to 4m / s, the speed of the oil pump motor under test ranges from 500r / min to 6000r / min, and the torque of the oil pump motor under test ranges from 0.2... ~1.2 The voltage range of the oil pump motor under test is 9.5V to 16V;

[0019] S2. Conduct speed control or torque control tests on the motor of the oil pump under test at each test point, as detailed below:

[0020] (1) Speed ​​control of the oil pump motor under test:

[0021] Switch the dynamometer to torque mode, raise the oil pump motor under test to the target speed, and then apply torque to the dynamometer until the oil pump motor under test runs normally under the current operating conditions. Record the corresponding test data in real time. The test data includes the temperature of the oil in the tank, the ambient temperature, the fan speed, and the speed, torque, voltage and current of the oil pump motor under test. The target speed is the speed of the oil pump motor under test under the current operating conditions.

[0022] The test ends after each test point reaches the corresponding preset time. The dynamometer is unloaded first, and the oil pump motor to be tested is reduced to zero speed. The power is then turned off.

[0023] (2) Torque control of the oil pump motor under test:

[0024] The dynamometer was switched to speed mode, and the speed was set to 300 r / min to 320 r / min. The oil pump motor under test was powered on and the applied torque was set to 0.05. ~0.10 The speed is increased until the dynamometer reaches the target speed. Then, the torque is applied to the oil pump motor under test until it operates normally under the current working conditions, and the corresponding test data is recorded in real time.

[0025] The test ends after each test point reaches its preset time. The oil pump motor under test is then unloaded until the torque is reduced to 0.05. ~0.10 After the dynamometer speed is reduced to 300r / min~320r / min, it is unloaded and stopped, and the power is turned off.

[0026] S3. Calculate the efficiency of the oil pump motor at each test point based on the recorded test data.

[0027] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0028] This device enables multi-performance index testing with high accuracy and versatility. Specifically, by adding an oil tank to the external oil pump motor under test, the oil level is ensured to be flush with the centerline of the motor's output shaft. A pipe is added to the tank to control the oil temperature through heat exchange. The tank's seal prevents oil from being thrown out during high-speed rotation, and the oil level can be monitored at any time. This fulfills the requirements for oil pump motor immersion, oil temperature, and environmental testing conditions. Combined with an environmental chamber to control the ambient temperature during testing, and an external adjustable fan with adjustable distance for wind speed control, this device integrates various testing conditions for the oil pump motor under test, making it suitable for various testing scenarios. It is particularly suitable for simulating the efficiency testing needs of small oil pump motors under various environmental conditions (ambient temperature, wind speed, oil immersion, oil temperature), solving the problem of wind speed and oil temperature control during performance testing of small oil pump motors, and improving the accuracy of efficiency and other performance tests (speed, torque, voltage, current, ambient temperature resistance, etc.). Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of the small oil pump motor performance testing device of the present invention;

[0030] Figure 2 This is a schematic diagram of the motor testing unit of the present invention;

[0031] Figure 3 This is a schematic diagram of the internal structure of the small oil pump motor performance testing device of the present invention;

[0032] Figure 4 This is a schematic diagram of the internal structure of the motor testing unit of the present invention;

[0033] Figure 5 This is a schematic diagram of the pipe structure of the present invention;

[0034] Figure 6 This is a schematic diagram of the assembly of the support platform and the linear motion module of the present invention;

[0035] Figure 7 This is a flowchart of the performance testing method for a small oil pump motor according to the present invention.

[0036] Explanation of reference numerals in the attached drawings: 1. Support platform; 2. Fan adjustment unit; 3. Motor oil immersion platform; 4. Coupling; 5. Dynamometer; 6. Environmental chamber; 7. Oil pump motor under test; 11. Telescopic outrigger; 12. Truss; 21. Linear motion module; 22. Fan; 31. Mounting base; 32. Oil tank; 33. Pipeline; 34. Level gauge; 35. Bushing; 36. Drive shaft; 37. Support base. Detailed Implementation

[0037] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0038] It should be noted that when a component is referred to as being "connected" to another component, it can be directly connected to the other component or there may be an intervening component. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application.

[0039] Example 1:

[0040] like Figures 1-6 As shown, a small oil pump motor performance testing device includes a support platform 1, a fan adjustment unit 2, and a motor testing unit, wherein:

[0041] The fan adjustment unit 2 is installed on the support platform 1 and includes a linear motion module 21 and a fan 22. The linear motion module 21 is used to drive the fan 22 to move closer to or away from the motor test unit.

[0042] The motor testing unit includes a motor oil immersion platform 3, a coupling 4, a dynamometer 5, and a test oil pump motor 7. The motor oil immersion platform 3 includes a mounting base 31, an oil tank 32, and a pipe 33. The mounting base 31 is connected to the support platform 1. The test oil pump motor 7 and the oil tank 32 are both connected to the mounting base 31, and the output shaft of the test oil pump motor 7 is immersed in the oil tank 32, keeping the center line of the output shaft of the test oil pump motor 7 flush with the oil level in the oil tank 32. The pipe 33 is partially built into the oil tank 32 and is used to pass liquid to regulate the temperature of the oil in the oil tank 32. The output shaft of the test oil pump motor 7 is also connected to the output shaft of the dynamometer 5 through the coupling 4.

[0043] The fan adjustment unit 2 enables wind speed adjustment. Firstly, the fan 22 is a high- and low-temperature resistant fan with adjustable wind speed. Secondly, the fan 22 is fixed to the linear motion module 21 via a mounting bracket. The linear motion module 21 is mounted on the support platform 1. The linear motion module 21 can drive the fan 22 to move closer to or further away from the motor test unit. Adjusting the linear motion module 21 allows for adjustment of the distance between the fan 22 and the oil pump motor 7 under test. Accurate wind speed adjustment can be achieved by adjusting the speed of the fan 22 and the distance between the fan 22 and the oil pump motor 7 under test. The motor immersion platform 3, coupling 4, and dynamometer 5 are arranged sequentially away from the fan adjustment unit 2. The dynamometer 5 provides speed or torque for performance testing of the test sample (oil pump motor under test). The coupling 4 can be used for connecting shafts of different inner diameters between the oil pump motor 7 under test and the dynamometer 5, as well as for flexible coaxial connections, facilitating the replacement of different models of oil pump motors. The oil tank 32 provides test fluid (such as lubricating oil) to provide a lubricating environment for the test sample. As a sealed tank, the oil tank 32 prevents the lubricating oil from being splashed out at high speeds during testing, while also reducing irritating odors and oil mist leakage. Parts passing through the oil tank 32 are sealed with double O-rings, ensuring the overall sealing performance of the oil tank. The mounting base 31 is used to mount the oil pump motor 7 under test and the oil tank 32 to support the overall weight. Its structure can be adjusted according to the structure and installation method of the oil pump motor 7 under test.

[0044] In one embodiment, the support platform 1 includes a plurality of telescopic legs 11 and a truss 12, the truss 12 being connected to each telescopic leg 11, and the height of the truss 12 being adjusted by the telescopic legs 11.

[0045] The truss 12 adopts a "well" shaped installation method, which can realize the horizontal adjustment of the fan adjustment unit 2 and the motor oil-immersed platform 3. It is divided into two rows, each row has two parallel profiles. The profiles of the upper row and the lower row are connected by screws and T-nuts. When it is necessary to adjust the horizontal direction, simply loosen the screws, move the corresponding profile to the desired position, and then tighten the connection to fix it. The telescopic legs 11 can also adjust the height of the truss 12, thereby realizing the vertical adjustment of the fan adjustment unit 2 and the motor oil-immersed platform 3. The preferred number of telescopic legs 11 is four, but it can be adjusted according to actual needs.

[0046] In one embodiment, the fan 22 is positioned close to the side of the oil pump motor 7 under test in the motor test unit, and the rotating shaft of the fan 22 is coaxial with the output shaft of the oil pump motor 7 under test.

[0047] In one embodiment, the motor immersion platform 3 further includes a bushing 35, a drive shaft 36, and a support base 37. The output shaft of the oil pump motor 7 under test is coaxially connected to the drive shaft 36 through the bushing 35. The drive shaft 36 passes through the oil tank 32 and is connected to the output shaft of the dynamometer 5 through the coupling 4. The support base 37 is built into the oil tank 32 and is rotatably connected to the drive shaft 36.

[0048] The drive shaft 36 transmits rotational speed and power, and the bushing 35 is connected to the output shaft (such as a splined shaft) of the oil pump motor 7 under test. The support base 37 can have any structure, such as including a fixed base and four horizontally arranged support rods. One end of each support rod is connected to the oil tank 32 or mounting base 31, and the other end is connected to the fixed base. The drive shaft 36 is rotatably connected to the fixed base. The support base 37 prevents the total weight of the oil tank 32 from increasing after refueling, thus preventing large stress deformation of the oil tank 32 and disrupting the coaxiality of the various moving shafts, which would adversely affect the test. The bushing 35 can be designed with any structure to match the shape and structure of the output shaft of the oil pump motor 7 under test and the drive shaft 36. Preferably, the bushing 35 is welded to the drive shaft 36 and then connected to the dynamometer 5 via a coupling 4 to ensure the coaxiality of each shaft.

[0049] In one embodiment, the motor testing unit further includes an environmental chamber 6, with a fan 22 and a motor immersion oil platform 3 built into the environmental chamber 6.

[0050] The environmental chamber 6 is used to regulate the ambient temperature to achieve temperature control. To ensure the normal operation of the linear motion module 21, the motor of the linear motion module 21 can be placed outside the environmental chamber 6 to prevent damage to the motor of the linear motion module 21 during high-temperature testing, thus affecting its service life.

[0051] In one embodiment, the motor immersion platform 3 further includes a level gauge 34 for observing the oil level in the oil tank 32. The level gauge 34 allows for real-time observation of the oil level in the oil tank 32. A level pipe can also be provided on the side of the oil tank to add an automatic oil replenishment device, enabling manual or automatic oil replenishment.

[0052] In one embodiment, the main body of the pipe 33 is a U-shaped spiral metal pipe, and both ends are straight pipe sections that pass through the oil tank 32. The liquid in the pipe 33 is water or ethylene glycol coolant.

[0053] In this embodiment, the main body of pipe 33 is a U-shaped spiral metal pipe built into mailbox 32, such as... Figure 5 As shown, the spiral shape of the pipe 33, folded into a U-shape, increases the contact area with the oil and improves heat exchange. It is easy to understand that the specific folding shape of the pipe 33 can be adjusted according to actual needs. Other liquids at the required temperature can also be passed through the pipe 33 to regulate the temperature of the oil in the oil tank 32.

[0054] In one embodiment, the motor testing unit further includes a temperature sensor and a speed and torque sensor. The temperature sensor is mounted on the oil pump motor 7 under test, and the speed and torque sensor is mounted on the coupling 4.

[0055] The temperature sensor can be attached to the outer surface of the oil pump motor 7 under test to provide real-time feedback on the temperature of the oil pump motor 7, which is used for real-time oil temperature adjustment. For more precise measurement, a speed and torque sensor can be installed on the coupling to measure speed and torque parameters, thus more accurately measuring the efficiency of the oil pump motor 7 under test.

[0056] In one embodiment, the dynamometer 5 is a servo motor. The dynamometer 5 can be a servo motor or other small dynamometers depending on the testing requirements, which is a common choice for those skilled in the art and will not be elaborated further here.

[0057] Working principle:

[0058] Before testing, the telescopic outrigger 11 and dynamometer 5 are fixed on the test platform. The alignment fan 22, the oil pump motor 7 under test, and the dynamometer 5 are then assembled. Oil is injected into the oil tank 32, ensuring the centerline of the output shaft of the oil pump motor 7 is flush with the oil level in the tank 32. The oil pump motor 7 is tested in two scenarios: power generation and power supply. In the former, the dynamometer 5 controls the speed, and the oil pump motor 7 controls the torque; in the latter, the dynamometer 5 controls the torque, and the oil pump motor 7 controls the speed. During testing, the required ambient temperature, wind speed, oil temperature, oil pump motor 7 speed, torque, and voltage are set. Then, the dynamometer 5 and oil pump motor 7 are started, and the feedback test data is recorded in real time, including the oil temperature in the tank, ambient temperature, fan speed, and the oil pump motor 7 speed, torque, voltage, and current, to calculate the efficiency of the oil pump motor 7.

[0059] Efficiency of the oil pump motor 7 under test The calculation is as follows:

[0060] ;

[0061] in,

[0062] ;

[0063] ;

[0064] In the formula, The power of the dynamometer is expressed in watts (W). The voltage of the dynamometer is expressed in volts (V). The current of the dynamometer is expressed in amperes (A). The mechanical power of the oil pump motor 7 under test is expressed in W. The speed of the oil pump motor 7 under test is given in r / min. The torque of the oil pump motor 7 under test is given in units of... .

[0065] This device is suitable for performance (efficiency) testing of small oil pump motors of different models. It can be used to reduce testing costs by replacing the mounting base 31, bushing 35, drive shaft 36 and coupling 4 corresponding to the oil pump motor under test.

[0066] Example 2:

[0067] like Figure 7 As shown, a method for testing the performance of a small oil pump motor, based on Example 1, includes the following steps:

[0068] S1. Power on the small oil pump motor performance testing device and set up several test points under different operating conditions. These conditions include the temperature of the oil in the oil tank 32, the ambient temperature, the wind speed of the fan 22, and the speed, torque, and voltage of the oil pump motor 7 under test. The oil temperature in the oil tank 32 ranges from -30℃ to +130℃, the ambient temperature ranges from -40℃ to +110℃, the wind speed of the fan 22 ranges from 1m / s to 4m / s, the speed of the oil pump motor 7 under test ranges from 500r / min to 6000r / min, and the torque of the oil pump motor 7 under test ranges from 0.2... ~1.2 The voltage range of the oil pump motor 7 under test is 9.5V to 16V.

[0069] S2. Conduct speed control or torque control tests on the oil pump motor 7 under test at each test point, as follows:

[0070] (1) Speed ​​control of the oil pump motor 7 under test:

[0071] Switch the dynamometer 5 to torque mode, raise the oil pump motor 7 under test to the target speed, and then apply torque to the dynamometer 5 until the oil pump motor 7 under test runs normally under the current working conditions, and record the corresponding test data in real time. The test data includes the temperature of the oil in the oil tank 32, the ambient temperature, the wind speed of the fan 22, and the speed, torque, voltage and current of the oil pump motor 7 under test. The target speed is the speed of the oil pump motor 7 under test under the current working conditions.

[0072] The test ends after each test point reaches the corresponding preset time. The dynamometer 5 is unloaded first, and the oil pump motor 7 to be tested is reduced to zero speed and the power is turned off.

[0073] (2) Torque control of the oil pump motor 7 under test:

[0074] Dynamometer 5 is switched to speed mode, and its speed is set to 300 r / min to 320 r / min. The oil pump motor 7 under test is powered on and the applied torque is set to 0.05. ~0.10 The speed is increased until the dynamometer 5 reaches the target speed. Then the torque is applied to the oil pump motor 7 under test until the oil pump motor 7 under test runs normally under the current working conditions, and the corresponding test data is recorded in real time.

[0075] The test ends after each test point reaches its preset time. The tested oil pump motor 7 is then unloaded to a torque of 0.05. ~0.10 After the dynamometer 5 speed is reduced to 300r / min~320r / min, it is unloaded and stopped, and the power is turned off.

[0076] S3. Calculate the efficiency of the oil pump motor at each test point based on the recorded test data.

[0077] Before testing, the oil pump motor 7 under test is correctly assembled into the small oil pump motor performance testing device, ensuring that the center line of the output shaft of the oil pump motor 7 is flush with the oil level in the oil tank 32. Then, the small oil pump motor performance testing device is powered on, and the functions of each electrical component are checked. If no abnormalities are found, the subsequent testing process is initiated. If an abnormality is found, an alarm and emergency stop protection is activated, and the subsequent testing process is not initiated. The ambient temperature refers to the temperature of the environment in which the oil pump motor 7 is located; if an ambient chamber 6 is provided, it refers to the temperature inside the ambient chamber 6. The temperature of the oil in the oil tank is referred to as oil temperature. It is easy to see that the speed, torque, and voltage of the oil pump motor 7 under test can be adjusted according to the parameters of the oil pump motor under test. During measurement, the voltage and current of the oil pump motor 7 under test should be measured at the terminals of the controller of the oil pump motor 7 under test. The torque and speed of the oil pump motor 7 under test should preferably be measured directly at the output shaft of the oil pump motor 7 under test. This method can achieve wide-condition testing.

[0078] After the test is completed, the efficiency of the oil pump motor 7 under test at each test point is calculated. The formula is as follows:

[0079]

[0080] In the formula, The power of the dynamometer is expressed in watts (W). The voltage of the dynamometer is expressed in volts (V). The current of the dynamometer is expressed in amperes (A). The mechanical power of the oil pump motor 7 under test is expressed in W. The speed of the oil pump motor 7 under test is given in r / min. The torque of the oil pump motor 7 under test is given in units of... The input power of the oil pump motor 7 under test is the electrical power of the dynamometer, and the output power is the mechanical power of the oil pump motor 7 under test, that is, the mechanical power of the output shaft of the oil pump motor 7 under test.

[0081] In this embodiment, the oil pump motor 7 under test is model FT4. For a test point, under the following conditions: the oil temperature in the oil tank 32 is 130℃, the ambient temperature is 110℃, the fan speed of the fan 22 is 4m / s, the rotational speed of the oil pump motor 7 under test is 2900r / min, and the torque of the oil pump motor 7 under test is 0.63. The voltage of the oil pump motor 7 under test is 14V.

[0082] Under these operating conditions, tests were conducted on the speed control or torque control of the oil pump motor 7 under test:

[0083] (1) Speed ​​control of the oil pump motor 7 under test:

[0084] Switch the dynamometer 5 to torque mode, raise the oil pump motor 7 to the target speed of 2900 r / min, and then apply torque to the dynamometer 5 until it reaches 0.63. The oil pump motor 7 under test operates normally under the current working conditions and records the corresponding test data in real time. The test data includes the temperature of the oil in the oil tank 32, the ambient temperature, the wind speed of the fan 22, and the speed, torque, voltage and current of the oil pump motor 7 under test. The test ends after the test point reaches the corresponding preset time (e.g., 10s). The dynamometer 5 is unloaded first, and then the speed of the oil pump motor 7 under test is reduced to zero and the power is turned off.

[0085] (2) Torque control of the oil pump motor 7 under test:

[0086] Dynamometer 5 is switched to speed mode, and its speed is set to 300 r / min. The oil pump motor 7 under test is powered on and its torque is applied to 0.05. The speed is increased until the dynamometer 5 reaches the target speed of 2900 r / min, and then the torque of the oil pump motor 7 is increased to 0.63. The tested oil pump motor 7 operates normally under the current working conditions, and the corresponding test data is recorded in real time. The test ends after the test point reaches the corresponding preset time (e.g., 10 seconds), and the tested oil pump motor 7 first unloads its torque to 0.05. After the dynamometer 5 speed is reduced to 300 r / min, it is unloaded and stopped, and the power is turned off.

[0087] It is easy to understand that the speed control or torque control tests of the tested oil pump motor 7 at other test points (operating conditions) are conducted in the same manner, and will not be repeated here. The efficiency of the tested oil pump motor at each test point is calculated based on the recorded test data to complete the performance test of the small oil pump motor.

[0088] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0089] The embodiments described above are merely specific and detailed examples of the embodiments described in this application, and should not be construed as limiting the scope of the application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the appended claims.

Claims

1. A small oil pump motor performance testing device, characterized in that: It includes a support platform (1), a fan adjustment unit (2), and a motor testing unit, wherein: The fan adjustment unit (2) is installed on the support platform (1) and includes a linear motion module (21) and a fan (22). The linear motion module (21) is used to drive the fan (22) to move closer to or away from the motor test unit. The motor testing unit includes a motor immersion platform (3), a coupling (4), a dynamometer (5), and a test oil pump motor (7). The motor immersion platform (3) includes a mounting base (31), an oil tank (32), and a pipe (33). The mounting base (31) is connected to a support platform (1). The test oil pump motor (7) and the oil tank (32) are both connected to the mounting base (31). The output shaft of the test oil pump motor (7) is immersed in the oil tank (32) and the center line of the output shaft of the test oil pump motor (7) is kept flush with the oil level in the oil tank (32). The pipe (33) is partially built into the oil tank (32) and is used to pass liquid to adjust the temperature of the oil in the oil tank (32). The output shaft of the test oil pump motor (7) is also connected to the output shaft of the dynamometer (5) through the coupling (4).

2. The small oil pump motor performance testing device as described in claim 1, characterized in that: The support platform (1) includes several telescopic legs (11) and a truss (12). The truss (12) is connected to each of the telescopic legs (11), and the height of the truss (12) can be adjusted by the telescopic legs (11).

3. The small oil pump motor performance testing device as described in claim 1, characterized in that: The fan (22) is located close to the side of the oil pump motor (7) under test in the motor test unit, and the rotating shaft of the fan (22) is coaxial with the output shaft of the oil pump motor (7) under test.

4. The small oil pump motor performance testing device as described in claim 1, characterized in that: The motor immersion platform (3) also includes a bushing (35), a drive shaft (36), and a support base (37). The output shaft of the oil pump motor (7) under test is coaxially connected to the drive shaft (36) through the bushing (35). The drive shaft (36) passes through the oil tank (32) and is connected to the output shaft of the dynamometer (5) through the coupling (4). The support base (37) is built into the oil tank (32) and rotatably connected to the drive shaft (36).

5. The small oil pump motor performance testing device as described in claim 1, characterized in that: The motor testing unit also includes an environmental chamber (6), in which the fan (22) and the motor immersion oil platform (3) are built.

6. The small oil pump motor performance testing device as described in claim 1, characterized in that: The motor immersion platform (3) also includes a level gauge (34) for observing the level of the oil in the oil tank (32).

7. The small oil pump motor performance testing device as described in claim 1, characterized in that: The main body of the pipe (33) is a U-shaped spiral metal pipe, and both ends are straight pipe sections that pass through the oil tank (32). The liquid in the pipe (33) is water or ethylene glycol coolant.

8. The small oil pump motor performance testing device as described in claim 1, characterized in that: The motor testing unit also includes a temperature sensor and a speed and torque sensor. The temperature sensor is installed on the oil pump motor (7) under test, and the speed and torque sensor is installed on the coupling (4).

9. The small oil pump motor performance testing device as described in claim 1, characterized in that: The dynamometer (5) is a servo motor.

10. A method for testing the performance of a small oil pump motor, characterized in that: Based on the small oil pump motor performance testing device according to any one of claims 1 to 9, the small oil pump motor performance testing method includes the following steps: S1. Power on the small oil pump motor performance testing device and set up several test points under different operating conditions. The operating conditions include the temperature of the oil in the oil tank (32), the ambient temperature, the wind speed of the fan (22), and the speed, torque, and voltage of the oil pump motor (7) under test. The temperature of the oil in the oil tank (32) ranges from -30℃ to +130℃, the ambient temperature ranges from -40℃ to +110℃, the wind speed of the fan (22) ranges from 1m / s to 4m / s, the speed of the oil pump motor (7) under test ranges from 500r / min to 6000r / min, and the torque of the oil pump motor (7) under test ranges from 0.

2. ~1.2 The voltage range of the oil pump motor (7) under test is 9.5V to 16V; S2. Conduct speed control or torque control tests on the oil pump motor (7) under test at each test point, as follows: (1) Speed ​​control of the oil pump motor (7) under test: The dynamometer (5) is switched to torque mode, the oil pump motor (7) under test is increased to the target speed, and then the dynamometer (5) applies torque until the oil pump motor (7) under test runs normally under the current working conditions, and the corresponding test data is recorded in real time. The test data includes the temperature of the oil in the oil tank (32), the ambient temperature, the wind speed of the fan (22), and the speed, torque, voltage and current of the oil pump motor (7) under test. The target speed is the speed of the oil pump motor (7) under the current working conditions. The test ends after each test point reaches the corresponding preset time. The dynamometer (5) is unloaded first, and the oil pump motor (7) under test is reduced to zero speed and the power is turned off. (2) Torque control of the oil pump motor (7) under test: The dynamometer (5) is switched to speed mode, and the speed of the dynamometer (5) is set to 300 r / min to 320 r / min. The oil pump motor (7) under test is powered on and the applied torque is set to 0.

05. ~0.10 The speed is increased until the dynamometer (5) reaches the target speed. Then the oil pump motor (7) under test is loaded with torque until the oil pump motor (7) under test runs normally under the current working conditions, and the corresponding test data is recorded in real time. The test ends after each test point reaches its corresponding preset time. The tested oil pump motor (7) first unloads its torque to 0.

05. ~0.10 The dynamometer (5) then reduces its speed to 300 r / min to 320 r / min and then stops unloading and shuts down, and the power is turned off. S3. Calculate the efficiency of the oil pump motor (7) under test at each test point based on the recorded test data.

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