A compressor EOL detection system

Abstract

The utility model discloses a kind of compressor EOL detection systems, belong to compressor detection field.A kind of compressor EOL detection system, including pressure detection module, flow detection module and vibration detection module;Compressor suction port is equipped with suction pipeline, and compressor exhaust port is equipped with exhaust pipeline;The pressure detection module includes suction pressure sensor and exhaust pressure sensor, suction pressure sensor is set to compressor suction port, exhaust pressure sensor is set to compressor exhaust port, and is respectively used to determine the suction pressure and exhaust pressure of compressor;Flow detection module is communicated with the suction pipeline of suction pressure sensor, for measuring actual suction volume flow;Vibration detection module is installed in the rigid part of compressor shell, for detecting the vibration value of compressor, to judge the defect condition of compressor.

Description

Technical Field

[0001] This utility model belongs to the field of compressor testing, and more specifically, relates to a compressor EOL testing system. Background Technology

[0002] In recent years, the automotive industry has developed rapidly in terms of electrification, intelligentization, and connectivity. End-of-Life (EOL) testing of new energy electric compressors is a crucial quality control step before the compressor leaves the factory; EOL testing is the final verification step on the production line to ensure the compressor's assembly integrity and functional performance, thereby ensuring that the product meets 100% of the design requirements.

[0003] Current end-of-life (EOL) testing of electric compressors uses ordinary load devices, resulting in unsatisfactory test results and an inability to effectively distinguish between acceptable and unacceptable parts. This allows defective compressors to be removed from the production line and enter the market, causing quality incidents. For example, the compressor online testing equipment disclosed in Chinese invention patent literature (CN202021245553.0) aims to stabilize voltage, intake pressure, and exhaust pressure by setting up a regulated power supply, intake pressure stabilization components, and exhaust pressure stabilization components, ensuring stable and accurate operating parameters for the compressor under test during load operation. However, this solution relies solely on intake and exhaust pressures, failing to comprehensively evaluate compressor performance. Especially when missing parts are present, it is difficult to identify defects through characteristic values, creating blind spots and affecting product reliability. Furthermore, this testing only covers a single exhaust condition, failing to encompass performance under multiple conditions, resulting in a one-sided evaluation that cannot fully reflect the compressor's stability and reliability in actual use.

[0004] Therefore, we need an EOL detection system for compressors that has a reasonable layout and can improve the detection accuracy of EOL. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a compressor EOL detection system with a reasonable layout and to evaluate the quality of the compressor through data parameters from multiple dimensions, while improving the detection accuracy of the EOL detection system through more accurate data detection.

[0006] This utility model discloses a compressor EOL detection system, which includes a pressure detection module, a flow detection module, and a vibration detection module. The pressure detection module includes an intake pressure sensor and an exhaust pressure sensor, which are used to measure the intake pressure and exhaust pressure of the compressor, respectively. An intake pipe is provided at the intake port of the compressor, and an exhaust pipe is provided at the exhaust port of the compressor.

[0007] The suction pressure sensor is located at the compressor suction port, and the discharge pressure sensor is located at the compressor discharge port. By detecting the pressure at locations closer to the compressor suction and discharge ports, the suction pressure sensor and discharge pressure sensor can more accurately detect the compressor suction pressure and discharge pressure, respectively.

[0008] The flow detection module is connected to the inhalation pipeline where the inhalation pressure sensor is located, and is used to measure the actual inhalation volume flow rate.

[0009] The vibration detection module is installed on a rigid part of the compressor housing to detect the vibration value of the compressor, thereby determining the defect status of the compressor.

[0010] As a further improvement of this utility model, the exhaust pipe where the exhaust pressure sensor is located is equipped with a regulating valve group; the regulating valve group includes a high-speed exhaust pipe, a medium-speed exhaust pipe and a pressure relief pipe; the high-speed exhaust pipe, the medium-speed exhaust pipe and the pressure relief pipe are arranged in parallel, the high-speed exhaust pipe and the medium-speed exhaust pipe are used to realize pressure detection under different operating conditions; the pressure relief pipe is used to quickly release the gas in the suction pipe and the exhaust pipe after the compressor stops, thereby ensuring that the compressor does not spray oil.

[0011] As a further improvement of this utility model, the regulating valve group is connected to a gas-liquid separation device. The upper pipeline of the gas-liquid separation device is connected to an exhaust purifier, and the lower pipeline of the gas-liquid separation device is connected to an oil discharge tank. This is used to effectively separate and recover the oil in the exhaust gas, avoid the loss of oil with the gas and thus prevent waste, and also avoid pollution and safety hazards caused by directly discharging the oil-gas mixture.

[0012] As a further improvement of this utility model, the high-speed exhaust pipeline includes a high-speed shut-off valve and a high-speed exhaust regulating valve for controlling the opening, closing and regulating of the high-speed exhaust pipeline; the medium-speed exhaust pipeline includes a medium-speed shut-off valve and a medium-speed exhaust regulating valve for controlling the opening, closing and regulating of the medium-speed exhaust pipeline; the pressure relief pipeline is equipped with a pressure relief valve for quickly releasing pressure after the compressor stops.

[0013] As a further improvement of this utility model, the flow detection module includes a gas flow meter, a small gas storage tank and a large gas storage tank; the gas flow meter is connected in series with the small gas storage tank and the large gas storage tank in sequence, and the large gas storage tank is connected to an external gas source, serving as a buffer for the small gas storage tank to receive gas, while avoiding the gas pressure entering the intake pipe from being directly distorted by the airflow impact when the gas source replenishes gas.

[0014] As a further improvement of this utility model, an intake shut-off valve and an intake regulating valve are provided between the flow detection module and the intake pressure sensor; the intake shut-off valve is used to control the on / off of the air source, and the intake regulating valve is used to regulate the intake pressure.

[0015] As a further improvement of this utility model, the compressor is equipped with a bypass shut-off valve in parallel. The bypass shut-off valve is connected to the suction pipe and the discharge pipe respectively. It is used to ensure that the compressor suction pipe is depressurized after the compressor stops, thereby ensuring that the compressor does not spray oil.

[0016] As a further improvement of this utility model, the vibration detection module is equipped with an ANOVIS system, which is used to identify abnormal noises in the OA value and Ticking characteristic value under medium-speed and high-speed exhaust pipe conditions.

[0017] As a further improvement of this utility model, the vibration detection module is a pin-type accelerometer.

[0018] Compared to existing technologies, the advantages of this invention are as follows: By designing the suction pressure sensor to the compressor suction port and the discharge pressure sensor to the compressor discharge port, the measured actual suction and discharge pressures are more accurate, improving the accuracy of EOL detection; by designing the gas flow meter between the gas tank and the compressor suction line, interference from airflow fluctuations on flow measurement is effectively avoided, ensuring the accuracy of flow data; by setting a large gas storage tank as a buffer for receiving gas, instantaneous flow distortion caused by airflow impact during gas supply is avoided, improving airflow stability; by setting the high-speed exhaust line and the medium-speed exhaust line in parallel, pressure detection is achieved under different operating conditions, and under medium-speed and high-speed operating conditions, combined with the vibration detection module and the ANOVIS system, abnormal parts are accurately identified through vibration; by setting a bypass shut-off valve in parallel with the compressor, which is connected to both the suction line and the discharge line, the compressor is depressurized after shutdown, thus ensuring that the compressor does not inject oil. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a compressor EOL detection system according to the present invention; Figure 2 This is a schematic diagram of the pressure detection module structure of this utility model; Figure 3 This is a schematic diagram of the regulating valve assembly structure of this utility model; Figure 4 This is a schematic diagram of the flow detection module of this utility model.

[0020] Explanation of the labels in the diagram: 1. Pressure detection module, 11. Intake pressure sensor, 12. Exhaust pressure sensor, 13. Intake pipeline, 14. Exhaust pipeline, 2. Flow detection module, 21. Gas flow meter, 22. Small gas storage tank, 23. Large gas storage tank, 24. Intake shut-off valve, 25. Intake regulating valve, 3. Vibration detection module, 4. Compressor, 5. Bypass shut-off valve, 6. Regulating valve group, 61. High-speed exhaust pipeline, 611. High-speed shut-off valve, 612. High-speed exhaust regulating valve, 62. Medium-speed exhaust pipeline, 621. Medium-speed shut-off valve, 622. Medium-speed exhaust regulating valve, 63. Pressure relief pipeline, 631. Pressure relief shut-off valve, 64. Gas-liquid separator, 65. Exhaust purifier, 66. Oil discharge tank. Detailed Implementation

[0021] Specific Implementation Example 1: Please refer to... Figures 1-4 A compressor EOL detection system includes a pressure detection module 1, a flow detection module 2, and a vibration detection module 3; the pressure detection module 1 includes an intake pressure sensor 11 and an exhaust pressure sensor 12, which are used to measure the intake pressure and exhaust pressure of the compressor 4, respectively; the compressor 4 is provided with an intake pipe 13 at the intake port and an exhaust pipe 14 at the exhaust port.

[0022] like Figure 2 The suction pressure sensor 11 is located at the suction port of the compressor 4, and the discharge pressure sensor 12 is located at the discharge port of the compressor 4. By detecting the pressure closer to the suction port and discharge port of the compressor 4, the suction pressure sensor 11 and the discharge pressure sensor 12 can detect the suction pressure and discharge pressure of the compressor 4 more accurately, respectively.

[0023] The flow detection module 2 is connected to the intake pipe 13 where the intake pressure sensor 11 is located, and is used to measure the actual intake volume flow rate.

[0024] The vibration detection module 3 is installed on a rigid part of the compressor 4 housing to detect the vibration value of the compressor 4, thereby determining the defect status of the compressor 4.

[0025] Specifically, such as Figure 3 The exhaust pressure sensor 12 is located in an exhaust pipe 14 equipped with a regulating valve group 6. The regulating valve group 6 includes a high-speed exhaust pipe 61, a medium-speed exhaust pipe 62, and a pressure relief pipe 63. The high-speed exhaust pipe 61, the medium-speed exhaust pipe 62, and the pressure relief pipe 63 are connected in parallel. The high-speed exhaust pipe 61 and the medium-speed exhaust pipe 62 are used to realize pressure detection under different operating conditions. The pressure relief pipe 63 is used to relieve pressure on the suction pipe 13 after the compressor 4 stops, thereby ensuring that the compressor 4 does not inject oil.

[0026] Specifically, the regulating valve group 6 is connected to a gas-liquid separator 64. The upper pipeline of the gas-liquid separator 64 is connected to an exhaust cleaner 65 to ensure that the exhaust does not pollute the environment. The lower pipeline of the gas-liquid separator 64 is connected to an oil discharge tank 66 to effectively separate and recover the oil in the exhaust, avoid the loss of oil with the gas and avoid pollution and safety hazards caused by directly discharging the oil-gas mixture.

[0027] Specifically, the high-speed exhaust pipe 61 includes a high-speed shut-off valve 611 and a high-speed exhaust regulating valve 612, used to control the opening, closing and regulation of the high-speed exhaust pipe 61; the medium-speed exhaust pipe 62 includes a medium-speed shut-off valve 621 and a medium-speed exhaust regulating valve 622, used to control the opening, closing and regulation of the medium-speed exhaust pipe 62; the pressure relief pipe 63 is equipped with a pressure relief valve 631, used to quickly relieve pressure in the intake pipe 13 after the compressor 4 stops.

[0028] Specifically, such as Figure 4 The flow detection module 2 shown includes a gas flow meter 21, a small gas storage tank 22, and a large gas storage tank 23. The gas flow meter 21 is connected in series with the small gas storage tank 22 and the large gas storage tank 23. The large gas storage tank 23 is connected to an external gas source and serves as a buffer for the small gas storage tank 22 to receive gas. At the same time, it avoids the gas pressure entering the intake pipe 13 from being directly distorted by the airflow impact when the gas source replenishes the gas.

[0029] Specifically, an intake shut-off valve 24 and an intake regulating valve 25 are provided between the flow detection module 2 and the intake pressure sensor 11; the intake shut-off valve 24 is used to control the air supply on and off, and the intake regulating valve 25 is used to regulate the intake pressure.

[0030] Specifically, the compressor 4 is equipped with a bypass shut-off valve 5 in parallel. The bypass shut-off valve 5 is connected to the suction pipe 13 and the discharge pipe 14 respectively. It is used to depressurize the suction pipe 13 after the compressor 4 stops, so as to ensure that no oil is sprayed when the compressor 4 is disassembled.

[0031] Specifically, the vibration detection module 3 is equipped with the ANOVIS system, which identifies abnormal noises in the OA value and Ticking characteristic value under medium and high speed operating conditions of the compressor 4, especially when mechanical noise is the main source of vibration, and thus judges whether the compressor 4 is qualified based on the vibration value of the abnormal noise.

[0032] Specifically, vibration detection module 3 is a pin-type accelerometer.

[0033] Specifically, the capability verification of OK or NG parts of compressor 4 using EOL testing is shown in the table below:

[0034] In summary, EOL testing can effectively identify the missing parts of compressor 4, and determine the specific fault type based on abnormal values ​​of suction pressure, discharge pressure, vibration value, power or flow rate, ensuring that compressor 4 meets the design standards before leaving the factory.

[0035] During operation, the intake shut-off valve 24, intake regulating valve 25, medium-speed shut-off valve 621, and medium-speed exhaust regulating valve 622 of the intake pipe 13 are opened, and the large air tank 23 is connected to the air source to ensure a smooth start-up of the compressor 4. At this time, the pressure at the compressor intake port and exhaust port is recorded by the intake pressure sensor 11 and the exhaust pressure sensor 12, the flow rate of the compressor 4 is recorded by the gas flow meter 21, and the vibration data of the compressor 4 during operation is recorded by the vibration detection module 3. The pressure, power, vibration, and flow parameters under medium-speed conditions are adjusted by the intake regulating valve 25 and the medium-speed exhaust regulating valve 622 to ensure the accuracy of the compressor's EOL detection results determined by the pressure, power, vibration, and flow parameters. Subsequently, the medium-speed shut-off valve 621 and the medium-speed exhaust regulating valve 622 are closed, and the high-speed shut-off valve 611 and the high-speed exhaust regulating valve 612 are opened to switch to high-speed operation, and the corresponding parameters are recorded and adjusted again. In medium-speed and high-speed operating conditions, the Ticking feature value and OA value are used respectively to identify abnormal noises emitted by compressor 4, effectively improving the detection accuracy of EOL of compressor 4; after the compressor 4 finishes operating, the bypass shut-off valve 5 is opened to release pressure, ensuring that the pressure in the suction line of compressor 4 is equal to atmospheric pressure.

[0036] The above description is merely a preferred embodiment of this utility model; however, the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be included within the protection scope of this utility model.

Claims

1. A compressor EOL detection system, characterized in that, It includes a pressure detection module (1), a flow detection module (2) and a vibration detection module (3); the pressure detection module (1) includes an intake pressure sensor (11) and an exhaust pressure sensor (12); the compressor (4) has an intake pipe (13) at its intake port and an exhaust pipe (14) at its exhaust port. The suction pressure sensor (11) is located at the suction port of the compressor (4), and the discharge pressure sensor (12) is located at the discharge port of the compressor (4) to detect the suction pressure and discharge pressure of the compressor (4) respectively. The flow detection module (2) is connected to the inhalation pipeline (13) where the inhalation pressure sensor (11) is located, and is used to measure the actual inhalation volume flow rate; The vibration detection module (3) is installed on the casing of the compressor (4) and is used to detect the vibration value of the compressor (4).

2. The compressor EOL detection system according to claim 1, characterized in that, The exhaust pressure sensor (12) is located in an exhaust pipe (14) equipped with a regulating valve group (6); the regulating valve group (6) includes a high-speed exhaust pipe (61), a medium-speed exhaust pipe (62) and a pressure relief pipe (63); the high-speed exhaust pipe (61), the medium-speed exhaust pipe (62) and the pressure relief pipe (63) are connected in parallel, the high-speed exhaust pipe (61) and the medium-speed exhaust pipe (62) are used to realize pressure detection under different working conditions; the pressure relief pipe (63) is used to release pressure from the compressor (4) in a timely manner.

3. The compressor EOL detection system according to claim 2, characterized in that, The regulating valve group (6) is connected to a gas-liquid separator (64). The upper pipeline of the gas-liquid separator (64) is connected to an exhaust cleaner (65), and the lower pipeline of the gas-liquid separator (64) is connected to an oil drain tank (66), which is used to effectively separate and recover the oil in the exhaust.

4. The compressor EOL detection system according to claim 2, characterized in that, The high-speed exhaust pipe (61) includes a high-speed shut-off valve (611) and a high-speed exhaust regulating valve (612) for controlling the opening, closing and regulating of the high-speed exhaust pipe (61); the medium-speed exhaust pipe (62) includes a medium-speed shut-off valve (621) and a medium-speed exhaust regulating valve (622) for controlling the opening, closing and regulating of the medium-speed exhaust pipe (62); the pressure relief pipe (63) is equipped with a pressure relief valve (631) for quickly releasing pressure after the compressor (4) stops.

5. The compressor EOL detection system according to claim 1, characterized in that, The flow detection module (2) includes a gas flow meter (21), a small gas storage tank (22) and a large gas storage tank (23); the gas flow meter (21) is connected in series with the small gas storage tank (22) and the large gas storage tank (23) in sequence, and the large gas storage tank (23) is connected to an external gas source and serves as a buffer for the small gas storage tank (22) to receive gas.

6. The compressor EOL detection system according to claim 5, characterized in that, The flow detection module (2) and the suction pressure sensor (11) are provided with an intake shut-off valve (24) and a suction regulating valve (25); the intake shut-off valve (24) is used to control the air supply and the suction regulating valve (25) is used to regulate the suction pressure.

7. The compressor EOL detection system according to claim 1, characterized in that, The compressor (4) is equipped with a bypass shut-off valve (5) in parallel. The bypass shut-off valve (5) is connected to the suction pipe (13) and the exhaust pipe (14) respectively, and is used to depressurize the suction pipe (13) of the compressor (4) after the compressor (4) stops.

8. A compressor EOL detection system according to claim 2, characterized in that: The vibration detection module (3) is equipped with an ANOVIS system, which is used to identify abnormal noises in the OA value and Ticking characteristic value of the medium-speed exhaust pipe (62) and the high-speed exhaust pipe (61) under operating conditions.

9. A compressor EOL detection system according to claim 8, characterized in that: The vibration detection module (3) is a pin-type accelerometer.

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