A life test device and method for motor parts of a compressor

Abstract

A life test device and method for motor parts of a compressor, the device includes a test box, a top cover installed above the test box, a test cavity formed between the top cover and the test box, motor parts arranged in the test box, and a refrigerant pipe extending into the top cover, a heating device and a power supply, wherein the motor parts include a test rotor and a test stator, and the test stator is electrically connected to the power supply. The present invention performs a life test of the motor by simulating the actual working conditions of the compressor motor, and completes the life test by working the main parts of the motor, namely the rotor and the stator, for a preset time under a certain temperature and refrigerant pressure. The device of the present invention occupies less space, consumes less power, and has low cost. The method of the present invention is simple to operate, easy to control, and has a short test preparation time, which can shorten working time, improve work efficiency, and is conducive to improving the accuracy of experimental results.

Description

Technical Field

[0001] The present invention relates to the field of motor technology, and more specifically, to a device and method for testing the life of motor parts of a compressor. Background Art

[0002] During the development and design phase of a compressor motor, in order to evaluate its reliability and dependability, it is usually necessary to place the motor parts in an environment with refrigerant and refrigeration oil and conduct a life test under specified temperature and refrigerant pressure conditions. Currently, there are two main methods for life testing of motor parts: (1) assembling the parts to be tested into a finished compressor, installing the compressor in an air-conditioning system or a dedicated compressor life test equipment, and simulating the actual working conditions of the compressor for life testing; (2) using a dedicated autoclave for testing: placing the motor parts to be tested in a autoclave filled with refrigeration oil, then filling it with a certain amount of refrigerant, and controlling the experimental temperature conditions through external heating to conduct a life test.

[0003] The first method mentioned above can simulate the environment in which the compressor works in reality, and the test results are relatively accurate. However, the test process is cumbersome and the finished compressor must be assembled first, and then completed through an air-conditioning system or special life test equipment. The experimental preparation time is long and the cost is high. In addition, the test equipment requires a large site, and each test consumes a large amount of refrigerant and electricity, which is not conducive to environmental protection and energy saving. The second experimental method mentioned above has the advantages of a single test equipment, simple operation method and low cost, but it can only test a single motor part and cannot simulate the test conditions of the motor in actual operation. The external heating method is more difficult to accurately control the temperature, thereby affecting the test results and has certain limitations. Summary of the invention

[0004] In order to solve the problems in the prior art of compressor motor life testing, such as complicated steps, long preparation time, high cost and inaccurate experimental results, a compressor motor part life testing device and method are now provided.

[0005] A compressor motor parts life test device comprises a test box, a top cover installed above the test box, a test cavity formed between the top cover and the test box, a motor part arranged in the test box, and a refrigerant pipe extending into the top cover, a heating device and a power supply, wherein the motor part comprises a test rotor and a test stator, and the test stator is electrically connected to the power supply.

[0006] Preferably, a rotor shaft is installed in the test chamber, the test rotor is sleeved on the rotor shaft, and a bearing sleeved on the rotor shaft is provided below the test rotor.

[0007] Preferably, the heating device comprises a temperature sensor, a controller, and a heating wire. The temperature sensor is installed in the test cavity, and the controller and the heating wire are arranged outside the test cavity. The controller is connected to the temperature sensor and the heating wire.

[0008] Preferably, a heat-insulating layer is disposed outside the test box, a closed heating chamber is formed between the heat-insulating layer and the test box, and the heating wire is installed in the heating chamber.

[0009] Preferably, a heat conductor is provided on the inner wall of the test box and / or the outer wall of the test box.

[0010] Preferably, an electrical connector is installed on the top cover, and the test stator and the power supply are electrically connected to the electrical connector.

[0011] Preferably, a valve and a pressure gauge are installed on the refrigerant pipeline, and the valve and the pressure gauge are arranged outside the test cavity.

[0012] Preferably, a method for testing the life of a motor part of a compressor comprises the following steps:

[0013] S1: Prepare a test stator and a test rotor for testing, and soak or spray the test rotor and the test stator with refrigeration oil;

[0014] S2: Install the soaked test rotor and test stator in a test box;

[0015] S3: After the test stator is connected to the electrical connector, the top cover is installed on the test box;

[0016] S4: After vacuuming the refrigerant pipeline, refrigerant is filled into the refrigerant pipeline, and the refrigerant fills the entire test cavity. When the pressure gauge reaches a preset value or a preset range, the refrigerant injection is stopped;

[0017] S5: After the power supply is electrically connected to the electrical connector, the power supply is started, and at this time, the test rotor drives the rotor shaft and the bearing sleeved on the rotor shaft to rotate;

[0018] S6: The controller controls the heating wire to heat to a preset temperature value or temperature range according to the temperature detected by the temperature sensor, so that the temperature in the test chamber is controlled within the preset temperature value or temperature range;

[0019] S7: Regularly monitor and record test data. Test data refers to the temperature and time data of the pressure gauge and controller display. The data can be preset before the test or modified as needed during the test to complete the life test of motor parts.

[0020] Preferably, a method for testing the life of a motor part of a compressor comprises the following steps:

[0021] S1: Prepare a test stator and a test rotor for testing, and soak or spray the test rotor and the test stator with refrigeration oil;

[0022] S2: Install the soaked test rotor and test stator in a test box;

[0023] S3: After the test stator is connected to the electrical connector, the top cover is installed on the test box;

[0024] S4: After vacuuming the refrigerant pipeline, refrigerant is filled into the refrigerant pipeline, and the refrigerant fills the entire test cavity. When the pressure gauge reaches a preset value or a preset range, the refrigerant injection is stopped;

[0025] S5: The controller controls the heating wire to heat to a preset temperature value or temperature range according to the temperature detected by the temperature sensor, so that the temperature in the test chamber is controlled within the preset temperature value or temperature range;

[0026] S6: After the power supply is electrically connected to the electrical connector, the power supply is started, and at this time, the test rotor drives the rotor shaft and the bearing sleeved on the rotor shaft to rotate;

[0027] S7: Regularly check and record test data. Test data refers to the temperature and time data of the pressure gauge and controller display. The data can be preset before the test or modified as needed during the test to complete the life test of motor parts.

[0028] Preferably, during steps S4 to S6, a pressure gauge is used to observe whether the pressure in the test chamber is within a preset value or a preset range, and the amount of refrigerant is increased or decreased by opening and closing a valve so that the pressure in the test chamber meets the preset value or the preset range.

[0029] The present invention provides a life test device for motor parts of a compressor, in which refrigerant is injected into a test cavity through a refrigerant pipeline, the temperature in the test cavity is controlled by a heating device, and a test rotor and a test stator are soaked in refrigeration oil before testing to simulate the working environment of the motor in the compressor. The device has the advantages of small space occupation, low power consumption, environmental protection, energy saving and low cost. The present invention also provides a life test method for motor parts of a compressor, in which a test stator and a test rotor soaked in refrigeration oil are installed in the test cavity, power is turned on, and the test cavity is operated for a certain period of time under set temperature and refrigerant pressure conditions to simulate the actual working conditions of the compressor motor for life testing. The method is simple to operate, easy to control, and has a short test preparation time, can shorten working time, improve work efficiency, and is conducive to improving the accuracy of experimental results. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of the present invention. DETAILED DESCRIPTION

[0031] In order to allow those skilled in the art to better understand the technical solution of the present invention, the present invention is further described below in conjunction with the accompanying drawings.

[0032] A compressor motor parts life test device includes a test box 2, a top cover 1 installed above the test box, a test cavity 3 formed between the top cover 1 and the test box 2, the top cover 1 and the test box 2 are tightly fixed and installed by top cover bolts 15, the motor parts are arranged in the test box 2, the motor parts include a test rotor 4 and a test stator 5, a refrigerant pipe 7 is provided, the refrigerant pipe 7 extends from the outside of the test cavity 3 into the test cavity, the refrigerant pipe 7 is used to inject refrigerant into the test cavity 3, a heating device is provided, the setting of the heating device can simulate the temperature of the motor working environment, a power supply is provided outside the test cavity, and the test stator is electrically connected to the power supply.

[0033] A rotor shaft 11 is installed in the test chamber 3, and a test rotor 4 is sleeved on the rotor shaft 11. A nut 18 is provided on the test rotor 4, and the nut 18 cooperates with the rotor shaft 11 to fix the test rotor 4 on the rotor shaft 11. A bearing 12 sleeved on the rotor shaft is provided below the test rotor 4. A bearing support 13 is provided in the test chamber 3, and the bearing 12 is located on the bearing support 13. A stator support 16 is provided in the test chamber 3, and the test stator 5 is fixed on the stator support 16 by stator bolts 14.

[0034] The heating device includes a temperature sensor 61, a controller 62, and a heating wire 63. The temperature sensor 61 is installed in the test chamber 3, and the controller 62 and the heating wire 63 are arranged outside the test chamber 3. The controller 62 is connected to the temperature sensor 61 and the heating wire 63. The temperature sensor 61 can sense the temperature in the test chamber and feed back to the controller 62. The controller 62 controls the heating wire 63 to work according to a preset temperature value or temperature range, so that the temperature in the test chamber is consistent with the preset temperature value or temperature range. The present invention simulates the temperature environment of the compressor motor through the heating device.

[0035] An insulation layer 9 is provided outside the test box 2, and a closed heating chamber is formed between the insulation layer 9 and the test box 2, and the heating wire is installed in the heating chamber. The insulation layer 9 can effectively reduce the heat diffusion in the test chamber 3, ensure the stability of the temperature in the test chamber, and reduce energy loss. The inner wall of the test box or / and the outer wall of the test box are provided with a heat conductor, and the heating wire 63 is located between the insulation layer 9 and the heat conductor 10. The heat conductor 10 is attached to or close to the test stator 5, and can better and timely transfer the heat of the heating wire 63 to the test stator 5 and the test rotor 4, ensuring the consistency of the temperature of each space in the test chamber 3, so that the working temperature of the test stator 5 and the test rotor 4 is consistent with the preset temperature value or temperature range. The stator support 16 and the bearing support 13 are arranged on the heat conductor 10, and the stator support 16 and the bearing support 13 can be directly or indirectly connected to the heat conductor 10, and the stator support 16 and the bearing support 13 can be an integral structure with the heat conductor 10.

[0036] An electrical connector 81 is installed on the top cover 1, and the test stator 5 is connected to the electrical connector 81. The test stator 5 is electrically connected to the electrical connector 81 through the lead wire on the test stator 5, and the electrical connector 81 is electrically connected to the power supply 8. When working, the power supply 8 provides electricity to the test stator 5, the test rotor 4 rotates, and drives the rotor shaft 11 and the bearing 12 to rotate, simulating the operation of the motor in the compressor.

[0037] A valve 71 and a pressure gauge 72 are installed on the refrigerant pipe 7. The valve 71 and the pressure gauge 72 are arranged outside the test chamber 3. The pressure gauge 72 can detect the pressure in the test chamber 3. According to the situation, when it is necessary to inject refrigerant into the test chamber, the valve 71 is opened to inject the refrigerant. When the injection of refrigerant is stopped, the valve 71 is closed to stop the injection of refrigerant.

[0038] The present invention provides a life test device for motor parts of a compressor. Refrigerant is injected into a test chamber 3 through a refrigerant pipe 7, the temperature in the test chamber is controlled by a heating device, and the working environment of the motor in the compressor is simulated by soaking a test rotor 4 and a test stator 5 in refrigeration oil before testing. The device has the advantages of small space occupation, low power consumption, environmental protection, energy saving and low cost.

[0039] Example 1

[0040] A method for testing the life of a motor part of a compressor comprises the following steps:

[0041] S1: preparing a test stator 5 and a test rotor 4 for testing, and soaking or spraying the test rotor and the test stator with refrigeration oil;

[0042] S2: installing the soaked test rotor 4 and test stator 5 in the test box 2;

[0043] S3: After the test stator 5 is connected to the electrical connector 81, the top cover 1 is installed on the test box 2;

[0044] S4: After vacuuming the refrigerant pipe 7, refrigerant is filled into the refrigerant pipe 7, and the refrigerant fills the entire test cavity 3. When the pressure gauge 72 reaches a preset value or a preset range, the refrigerant injection is stopped;

[0045] S5: After the power source 8 is electrically connected to the electrical connector 81, the power source is started, and at this time, the test rotor 4 drives the rotor shaft 11 and the bearing 12 sleeved on the rotor shaft 11 to rotate;

[0046] S6: The controller 62 controls the heating wire 63 to heat to a preset temperature value or temperature range according to the temperature detected by the temperature sensor 61, so that the temperature in the test chamber 3 is controlled within the preset temperature value or temperature range;

[0047] S7: Regularly check and record test data. Test data refers to the temperature and time data of the pressure gauge 72 and the controller display. The data can be preset before the test or modified as needed during the test to complete the life test of the motor parts.

[0048] During step S4 to step S6, the pressure gauge 72 is used to observe whether the pressure in the test chamber 3 is within a preset value or a preset range, and the amount of refrigerant is increased or decreased by opening and closing the valve 71 so that the pressure in the test chamber meets the preset value or the preset range.

[0049] The present invention uses the main parts of the motor, the rotor and the stator, to perform tests, immersing them in refrigeration oil, in a refrigerant environment and at a certain temperature to simulate the working condition of the motor in the compressor. After the test stator and the test rotor have worked in the test chamber for a preset time, the test stator and the test rotor are taken out to observe their wear and tear to estimate the service life of the compressor motor.

[0050] Example 2

[0051] A method for testing the life of a motor part of a compressor comprises the following steps:

[0052] S1: preparing a test stator 5 and a test rotor 4 for testing, and soaking or spraying the test rotor and the test stator with refrigeration oil;

[0053] S2: installing the soaked test rotor 4 and test stator 5 in a test box;

[0054] S3: After the test stator 8 is connected to the electrical connector 81, the top cover 1 is installed on the test box 2;

[0055] S4: After vacuuming the refrigerant pipe 7, refrigerant is filled into the refrigerant pipe 7, and the refrigerant fills the entire test cavity. When the pressure gauge 72 reaches a preset value or a preset range, the refrigerant injection is stopped;

[0056] S5: The controller 62 controls the heating wire 63 to heat to a preset temperature value or a temperature range according to the temperature detected by the temperature sensor 61, so that the temperature in the test chamber 3 is controlled within the preset temperature value or temperature range;

[0057] S6: After the power source 8 is electrically connected to the electrical connector 81, the power source 8 is started, and at this time, the test rotor 4 drives the rotor shaft 11 and the bearing 12 sleeved on the rotor shaft to rotate;

[0058] S7: Regularly check and record test data. Test data refers to the temperature and time data of the pressure gauge 72 and the controller display. The data can be preset before the test or modified as needed during the test to complete the life test of the motor parts.

[0059] During step S4 to step S6, the pressure gauge 72 is used to observe whether the pressure in the test chamber is within a preset value or a preset range, and the amount of refrigerant is increased or decreased by opening and closing the valve 71 so that the refrigerant pressure in the test chamber meets the preset value or the preset range.

[0060] The present invention uses the main parts of the motor, the rotor and the stator, to perform tests, immersing them in refrigeration oil, in a refrigerant environment and at a certain temperature to simulate the working condition of the motor in the compressor. After the test stator and the test rotor have worked in the test chamber for a preset time, the test stator and the test rotor are taken out to observe their wear and tear to estimate the service life of the compressor motor.

[0061] The present invention also provides a method for testing the life of motor parts of a compressor. A test stator and a test rotor soaked in refrigeration oil are installed in a test chamber, and the power is turned on. The test chamber is operated for a certain period of time under set temperature and refrigerant pressure conditions to simulate the actual working conditions of the compressor motor for life testing. The method is simple to operate, easy to control, and has a short test preparation time. It can shorten working time, improve work efficiency, and is conducive to improving the accuracy of experimental results.

[0062] The above embodiments are only specific implementations of the present invention, and their descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, and these obvious replacement forms all belong to the protection scope of the present invention.

Claims

1. A compressor motor parts life test device, characterized in that: The invention comprises a test box (2), a top cover (1) installed above the test box (2), a test cavity (3) formed between the top cover (1) and the test box (2), a motor part arranged in the test box (2), and a refrigerant pipe (7) extending into the top cover (1), as well as a heating device and a power source (8), wherein the refrigerant pipe extends into the test cavity so as to inject refrigerant into the test cavity and evacuate the cavity; the motor part comprises a test rotor (4) and a test stator (5), and the test stator (5) is electrically connected to the power source (8); The heating device comprises a temperature sensor (61), a controller (62), and a heating wire (63); the temperature sensor (61) is installed in the test cavity (3); the controller (62) and the heating wire (63) are arranged outside the test cavity (3); and the controller (62) is connected to the temperature sensor (61) and the heating wire (63); The test box (2) is provided with a heat-insulating layer (9) outside, a closed heating chamber is formed between the heat-insulating layer and the test box, and the heating wire is installed in the heating chamber.

2. The compressor motor parts life test device according to claim 1, characterized in that: A rotor shaft (11) is installed in the test chamber (3), the test rotor (4) is sleeved on the rotor shaft (11), and a bearing (12) sleeved on the rotor shaft (11) is provided below the test rotor (4).

3. The compressor motor parts life test device according to claim 1, characterized in that: The inner wall of the test box (2) and / or the outer wall of the test box are provided with a heat conductor (10).

4. The compressor motor parts life test device according to claim 2, characterized in that: An electrical connector (81) is installed on the top cover (1), and the test stator (5) and the power supply (8) are electrically connected to the electrical connector (81).

5. The compressor motor parts life test device according to claim 4, characterized in that: The refrigerant pipe (7) is installed with a valve (71) and a pressure gauge (72), and the valve (71) and the pressure gauge (72) are arranged outside the test chamber (3).

6. A method for testing the life of a motor part of a compressor, implemented based on the device for testing the life of a motor part of a compressor according to claim 5, characterized in that: The following steps are involved: S1: preparing a test stator (5) and a test rotor (4) for testing, and soaking or spraying the test rotor (4) and the test stator (5) with refrigeration oil; S2: installing the soaked test rotor (4) and the test stator (5) in the test box (2); S3: After the test stator (5) is connected to the electrical connector (81), the top cover (1) is installed on the test box (2); S4: After vacuuming the refrigerant pipe (7), refrigerant is filled into the refrigerant pipe (7) so that the refrigerant fills the entire test cavity (3). When the pressure gauge (72) reaches a preset value or is within a preset range, the refrigerant injection is stopped; S5: After the power source (8) is electrically connected to the electrical connector (81), the power source (8) is started, and the test rotor (4) drives the rotor shaft (11) and the bearing (12) sleeved on the rotor shaft to rotate; S6: The controller (62) controls the heating wire (63) to heat to a preset temperature value or a temperature range according to the temperature detected by the temperature sensor (61), so that the temperature in the test chamber (3) is controlled within the preset temperature value or the temperature range; S7: Regularly monitor and record test data. Test data refers to the pressure data of the pressure gauge, the temperature and time data of the controller display. The data is preset before the test or modified as needed during the test to complete the life test of the motor parts.

7. A method for testing the life of a motor part of a compressor, implemented based on the device for testing the life of a motor part of a compressor according to claim 5, characterized in that: The following steps are involved: S1: preparing a test stator (5) and a test rotor (4) for testing, and soaking or spraying the test rotor (4) and the test stator (5) with refrigeration oil; S2: installing the soaked test rotor (4) and the test stator (5) in the test box (2); S3: After the test stator (5) is connected to the electrical connector (81), the top cover (1) is installed on the test box (2); S4: After vacuuming the refrigerant pipe (7), refrigerant is filled into the refrigerant pipe (7) so that the refrigerant fills the entire test cavity (3). When the pressure gauge (72) reaches a preset value or is within a preset range, the refrigerant injection is stopped; S5: The controller (62) controls the heating wire (63) to heat to a preset temperature value or a temperature range according to the temperature detected by the temperature sensor (61), so that the temperature in the test chamber (3) is controlled within the preset temperature value or the temperature range; S6: After the power source (8) is electrically connected to the electrical connector (81), the power source is started, and the test rotor (4) drives the rotor shaft (11) and the bearing (12) sleeved on the rotor shaft to rotate; S7: Regularly check and record test data. Test data refers to the pressure data of the pressure gauge, the temperature and time data of the controller display. The data is preset before the test or modified as needed during the test to complete the life test of motor parts.

8. A compressor motor parts life test method according to claim 6 or 7, characterized in that: During step S4 to step S6, the pressure gauge (72) is used to observe whether the pressure in the test chamber is within a preset value or a preset range, and the amount of refrigerant is increased or decreased by opening and closing the valve (71) so that the pressure in the test chamber meets the preset value or the preset range.

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