System and method for detecting performance of lubricating oil filtering equipment

Abstract

The invention relates to a system and a method for detecting the performance of lubricating oil filtering equipment. A system for detecting the performance of lubricating oil filtering equipment comprises equipment to be detected, and the equipment to be detected is provided with an inlet, an outlet and a backwashing port; the inlet is communicated with the oil tank through an inlet pipe group; a static test oil pump is cooperatively mounted on the inlet pipe group; the inlet pipe set is connected with a dynamic test pipe set, the end of the dynamic test pipe set extends into the oil tank, and a dynamic test oil pump is installed on the dynamic test pipe set in a matched mode. The outlet is communicated with the oil tank through an outlet pipe set, a particle sensor is installed on the outlet pipe set in a matched mode, and lubricating oil in the tested device flows into the oil tank through the outlet pipe set. The outlet pipe group is connected with a backwashing pipe group, the end head of the backwashing pipe group is connected with the backwashing port, the inlet pipe group is connected with a bypass branch pipe, and the end head of the bypass branch pipe extends into the oil tank. The test efficiency can be effectively improved, manual intervention is reduced, data errors are reduced, and the test process is safe and stable.

Description

Technical Field

[0001] This invention relates to the field of performance testing technology for lubricating oil filtration equipment, and in particular to a performance testing system and method for lubricating oil filtration equipment. Background Technology

[0002] Oil filters can filter impurities in lubricating oil, prevent secondary wear on aircraft engine components, extend their lifespan, ensure the engine's long-term stable operation, and provide a guarantee for the engine's safe operation.

[0003] In existing technologies, performance testing of automatic lubricating oil filters often involves manually controlling the pump set to start and stop to adjust the pressure, and then manually recording the flow and pressure data. However, manual testing is inefficient, and manual recording is prone to data errors, reducing the accuracy and reliability of the test results. Furthermore, it cannot perform multiple performance tests simultaneously, requiring repeated disassembly and reassembly of the filter, increasing operational complexity and equipment wear. Summary of the Invention

[0004] Therefore, it is necessary to provide a lubricating oil filter performance testing system and method to address the problems of low testing efficiency, poor data reliability and accuracy, limited functionality, high operational complexity, and increased equipment wear in existing lubricating oil filter performance testing technologies.

[0005] The technical solution adopted in this invention is as follows: A performance testing system for lubricating oil filtration equipment includes a device under test, which is equipped with an inlet, an outlet and a backwash port. A first valve and an inlet pressure transmitter sensor are installed at the inlet, and a second valve and an outlet pressure transmitter sensor are installed at the outlet. The inlet is connected to the oil tank through the inlet pipe assembly. A static test oil pump is installed on the inlet pipe assembly. When performing static performance testing, the static test oil pump draws lubricating oil from the oil tank and sends it into the equipment under test through the inlet pipe assembly. The inlet pipe assembly is connected to a dynamic test pipe assembly, the end of which extends into the oil tank. A dynamic test oil pump is installed on the dynamic test pipe assembly. When performing dynamic performance testing, the dynamic test oil pump draws lubricating oil from the oil tank and sends it sequentially through the dynamic test pipe assembly and the inlet pipe assembly into the device under test. The outlet is connected to the oil tank through an outlet pipe assembly. A particle sensor is installed on the outlet pipe assembly, and the lubricating oil in the tested equipment flows into the oil tank through the outlet pipe assembly. The outlet pipe assembly is connected to a backwash pipe assembly, the end of which is connected to the backwash port. The inlet pipe assembly is connected to a bypass branch pipe, the end of which extends into the oil tank. The lubricating oil in the oil tank flows into the tested equipment through the outlet pipe assembly and the backwash pipe assembly in sequence, and then flows back into the oil tank through the inlet pipe assembly and the bypass branch pipe, thereby performing backwashing.

[0006] As a further improvement to the above technical solution: The fuel tank is an open-type fuel tank with an open opening and a volume of 1500L.

[0007] The oil tank is equipped with a temperature control module, which regulates the temperature of the lubricating oil in the tank.

[0008] The temperature control module includes a dual-effect cooling and heating unit arranged outside the oil tank, and heat exchange coils arranged inside the oil tank. The heat exchange medium inlet of the dual-effect unit is connected to the heat exchange medium outlet of the heat exchange coil, and the heat exchange medium outlet of the dual-effect unit is connected to the heat exchange medium inlet of the heat exchange coil. This allows the heat exchange medium to circulate between the dual-effect unit and the heat exchange coil, thereby exchanging heat with the lubricating oil in the oil tank.

[0009] The oil tank is equipped with a circulation filtration module, which circulates and filters the lubricating oil in the oil tank. The circulating filtration module includes a circulating filtration pipe assembly with both ends connected to the inside of the oil tank, and a circulating pump and a continuous filtration device are respectively installed on the circulating filtration pipe assembly.

[0010] A testing method using the lubricating oil filtration equipment performance testing system described above includes the following steps: S1. Preparation: Ensure the temperature of the lubricating oil in the tank is 20℃±5℃, the oil level in the tank is in the high level range, and the particle sensor has completed preheating. S2. Equipment clamping: According to the model of the equipment under test, adjust the spacing between the two support plates in the adjustable bracket so that the installation height of the inlet pipe assembly corresponds to the installation height of the inlet, thereby realizing the quick docking between the inlet pipe assembly and the inlet, and so that the installation height of the outlet pipe assembly corresponds to the installation height of the outlet, thereby realizing the quick docking between the outlet pipe assembly and the outlet. S3. Static pressure resistance test: Close the second valve, open the first valve, start the static test oil pump, and the static test oil pump sends the lubricating oil in the oil tank into the tested equipment through the inlet pipe assembly at a certain pressure. The pressure is gradually increased to the maximum allowable working pressure of the equipment under test according to the PID control algorithm, and the pressure is maintained for the first set time. During the pressure maintenance period, the pressure at the inlet is collected in real time by the inlet pressure transmitter sensor, and the oil leakage at the inlet is monitored by the ultraviolet detection device. If the difference between the maximum real-time pressure value collected by the inlet pressure transmitter and the minimum real-time pressure value collected by the inlet pressure transmitter, i.e., the pressure drop, is ≤0.5 bar, and there is no leakage, then the static pressure resistance test is deemed to be qualified. Otherwise, the static pressure resistance test will fail. S4. Dynamic filtration performance test: Open the first valve and the second valve, start the dynamic test oil pump, and the dynamic test oil pump sends the lubricating oil in the oil tank through the dynamic test pipe group and the inlet pipe group to the tested equipment in sequence according to a certain pressure. After being filtered by the tested equipment, it flows back to the oil tank through the outlet pipe group. A flow detection component is installed on the outlet pipe assembly. When the flow detection component detects that the flow rate of the lubricating oil in the outlet pipe assembly has stabilized to the output flow design value of the device under test, the particle sensor is activated. The particle sensor detects the particle concentration of the lubricating oil in the outlet pipe assembly and continuously performs particle concentration detection for a second set time. During the particle concentration detection by the particle sensor, the pressure at the inlet is collected in real time by the inlet pressure transmitter sensor, and the pressure at the outlet is collected in real time by the outlet pressure transmitter sensor. If the particle concentration values ​​collected by the particle sensor all meet the design requirements of the device under test, and the difference between the maximum real-time pressure collected by the inlet pressure transmitter and the minimum real-time pressure collected by the outlet pressure transmitter, i.e., the filtration pressure drop ≤ 2 bar, then the dynamic filtration performance test is deemed to be qualified. Otherwise, the dynamic filtration performance test will fail; S5. Backwashing performance test: Backwash the equipment under test and monitor the lubricating oil pressure and flow rate at the backwash port during the backwashing process. Before backflushing, the dynamic test oil pump is started, so that the lubricating oil in the oil tank flows back into the oil tank through the dynamic test pipe group, the inlet pipe group, the tested equipment, and the outlet pipe group in sequence. The particle concentration of the lubricating oil in the outlet pipe group is detected by the particle sensor, thereby obtaining the first set of particle concentration values. After backwashing is completed, the dynamic test oil pump is started, so that the lubricating oil in the oil tank flows back into the oil tank through the dynamic test pipe group, the inlet pipe group, the tested equipment, and the outlet pipe group in sequence. The particle concentration of the lubricating oil in the outlet pipe group is detected by the particle sensor, thereby obtaining the second particle concentration value group. The backwashing particle removal rate is calculated by comparing the first set of particle concentration values ​​with the second set of particle concentration values. If the fluctuation of lubricating oil pressure and lubricating oil flow rate at the backflushing port is ≤±5% during backflushing, and the backflushing particle removal rate is ≥95%, then the backflushing performance test is deemed qualified. Otherwise, the backwashing performance test is deemed unqualified; S6. After the static pressure resistance test, dynamic filtration performance test and / or backwashing performance test are completed, the lubricating oil in the tested equipment is emptied by the built-in vacuum pump. Then the equipment support module is disassembled, and finally the tested equipment is hoisted to the storage area. The testing system is then reset to standby mode.

[0011] As a further improvement to the above technical solution: Both the first and second set times are 15 minutes.

[0012] In the dynamic filtration performance test, the opening degree of the first valve stabilizes the pressure of the lubricating oil at the inlet at 16 bar, and the opening degree of the second valve stabilizes the pressure of the lubricating oil at the outlet at 16 bar.

[0013] A backflushing valve is installed at the backflushing port. During backflushing, the opening of the backflushing valve keeps the pressure of the lubricating oil at the backflushing port stable at 14 bar.

[0014] When the tested equipment is emptied, the emptying time is ≤3 minutes, and after emptying, the residual oil content in the tested equipment is ≤50ml.

[0015] The beneficial effects of this invention are as follows: This invention features a compact and rational structure, and is easy to operate. By setting up static test oil pumps, dynamic test oil pumps, and corresponding pipe groups, a multi-loop test structure can be formed within the testing system, thereby achieving integrated testing of static pressure resistance, dynamic filtration, backwashing performance, and particle concentration detection, effectively improving testing efficiency. At the same time, by setting up adjustable brackets and PID control algorithms, it can be adapted to lubricating oil filtration equipment of different specifications, reducing manual intervention, lowering data errors, and ensuring the safety and stability of the testing process.

[0016] The present invention also has the following advantages: (1) By setting a temperature control module, the present invention can accurately regulate the temperature of the lubricating oil in the oil tank, so that the test can be carried out in different temperature environments, meet diverse test requirements, improve the comprehensiveness and accuracy of the test, and ensure the reliability of the performance test results of the tested equipment.

[0017] (2) By setting up a circulating filtration module, the present invention can circulate and filter the lubricating oil in the oil tank and continuously purify it, ensuring the cleanliness of the test oil and improving the accuracy of the test.

[0018] (3) By setting an adjustable bracket (the spacing is adjustable in the range of 488-710mm) and a standardized flange interface (compatible with various specifications such as DN63.7), the present invention can be compatible with various models of automatic lubricating oil filters without the need to change tooling, thereby reducing equipment investment costs and effectively improving system compatibility.

[0019] (4) By setting up a PLC control module and a pressure transmitter, the present invention can monitor overpressure in real time and monitor lubricating oil leakage by setting up an ultraviolet detection device. Furthermore, within 10 seconds after an abnormal situation is triggered, it can automatically depressurize and alarm, effectively improving the safety performance of the system.

[0020] (5) The static performance test of the present invention is based on the PID stabilization algorithm, which can ensure that the pressure stability is better than the ±1 bar standard of the existing detection system.

[0021] (6) By setting up a particle sensor, the present invention can detect particle concentration and evaluate backwashing efficiency. The test results can comprehensively reflect the actual working performance of the tested equipment, thereby providing richer performance indicators.

[0022] (7) The detection method of the present invention integrates multi-mode testing of static, dynamic, backwashing and particle detection, without the need for multiple disassembly and assembly of the tested equipment, and the test cycle of a single tested equipment can be shortened to less than 40 minutes, with an efficiency improvement of more than 33%. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of a structure according to an embodiment of the present invention.

[0024] Figure 2 This is a schematic diagram of the installation structure of the adjustable bracket and the inlet pipe assembly and outlet pipe assembly in this invention.

[0025] Figure 3 This is a schematic diagram of another embodiment of the present invention.

[0026] The components include: 1. Static test oil pump; 2. Dynamic test oil pump; 3. Equipment under test; 4. Oil receiving chassis; 5. Oil tank; 6. Temperature control module; 7. Circulation filtration module; 8. Equipment support module; 9. Hydraulic motor test module; 10. Particle sensor; 11. First valve; 12. Second valve; 13. Dynamic test pipe assembly; 14. Backwash pipe assembly; 15. Inlet pipe assembly; 16. Outlet pipe assembly; 17. Connecting branch pipe; 18. Bypass branch pipe; 19. Inlet pressure transmitter sensor; 20. Outlet pressure transmitter sensor; 21. Electric selector valve; 22. Outlet branch pipe; 23. Adjustable bracket; 24. Connecting flange. 601. Dual-effect cooling and heating unit; 602. Heat exchange coil; 603. Temperature transmitter; 701. Circulating pump; 702. Continuous filtration device; 703. Circulating filter tube assembly; 801. First oil pan; 802. First return oil pump; 803. First return oil pipe assembly; 901. Second oil pan; 902. Motor assembly under test; 903. Measuring fixture; 904. Level gauge; 905. Second return oil pump; 906. Second return oil pipe assembly. Detailed Implementation

[0027] The specific embodiments of the present invention will now be described with reference to the accompanying drawings.

[0028] like Figure 1As shown, the lubricating oil filtration equipment performance testing system of this embodiment includes a device under test 3. The device under test 3 is equipped with an inlet, an outlet, and a backwash port. A first valve 11 and an inlet pressure transmitter sensor 19 are installed at the inlet, and a second valve 12 and an outlet pressure transmitter sensor 20 are installed at the outlet. The inlet is connected to the oil tank 5 through an inlet pipe assembly 15. A static test oil pump 1 is installed on the inlet pipe assembly 15. During static performance testing, the static test oil pump 1 draws lubricating oil from the oil tank 5 and sends it into the device under test 3 through the inlet pipe assembly 15. A dynamic test pipe assembly 13 is connected to the inlet pipe assembly 15. The end of the dynamic test pipe assembly 13 extends into the oil tank 5. A dynamic test oil pump 2 is installed on the dynamic test pipe assembly 13 to perform dynamic performance testing. During dynamic performance testing, the dynamic test oil pump 2 draws lubricating oil from the oil tank 5 and sequentially sends it to the device under test 3 through the dynamic test pipe assembly 13 and the inlet pipe assembly 15. The outlet is connected to the oil tank 5 through the outlet pipe assembly 16, on which a particle sensor 10 is installed. The lubricating oil in the device under test 3 flows into the oil tank 5 through the outlet pipe assembly 16. The backwash pipe assembly 14 is connected to the outlet pipe assembly 16, and the end of the backwash pipe assembly 14 is connected to the backwash port. The bypass branch pipe 18 is connected to the inlet pipe assembly 15, and the end of the bypass branch pipe 18 extends into the oil tank 5. The lubricating oil in the oil tank 5 flows into the device under test 3 sequentially through the outlet pipe assembly 16 and the backwash pipe assembly 14, and then flows back into the oil tank 5 through the inlet pipe assembly 15 and the bypass branch pipe 18, thus performing backwashing. By setting up static test oil pump 1, dynamic test oil pump 2 and corresponding pipe groups, a multi-loop test structure can be formed within the testing system, thereby realizing integrated testing of static pressure resistance, dynamic filtration, backwashing performance and particle concentration detection, effectively improving testing efficiency.

[0029] Figure 1 In the diagram, the blue line represents the dynamic test tube group 13, the green line represents the backwash tube group 14, and the red line represents the inlet tube group 15. In this embodiment, a connecting branch pipe 17 is also connected between the dynamic test tube group 13 and the inlet tube group 15. A third valve is installed on the connecting branch pipe 17. By setting the connecting branch pipe 17, the dynamic test tube group 13 and the inlet tube group 15 are isolated to avoid interference and ensure the accuracy of the test and the stability of the system.

[0030] In this embodiment, an outlet branch pipe 22 is installed on the outlet pipe assembly 16 in cooperation with an electric selector valve 21. Specifically, the inlet of the electric selector valve 21 is connected to the outlet pipe assembly 16, the first outlet of the electric selector valve 21 is connected to the outlet pipe assembly 16, thereby connecting the electric selector valve 21 to the outlet pipe assembly 16. The second outlet of the electric selector valve 21 is connected to one end of the outlet branch pipe 22, and the other end of the outlet branch pipe 22 is connected to the outlet pipe assembly 16. By setting the electric selector valve 21, the flow direction of the lubricating oil can be flexibly switched, so that the high-speed flowing lubricating oil is diverted through the outlet branch pipe 22 and then flows back to the oil tank 5 through the outlet pipe assembly 16, while the low-speed flowing lubricating oil flows directly back to the oil tank 5 through the outlet pipe assembly 16, thereby improving the system's flexibility and safety.

[0031] In addition, flow meters are installed on the backwash pipe assembly 14, the outlet branch pipe 22 and the outlet pipe assembly 16 to detect the flow rate of the fluid in the corresponding pipe.

[0032] Oil tank 5 is an open-type oil tank with an open opening. The volume of oil tank 5 is 1500L, which can meet the large lubricating oil requirements under the multi-loop test structure, ensuring the stable and continuous operation of the test. The open design makes it easy to observe, maintain and add lubricating oil, effectively improving the overall practicality and convenience of the test system.

[0033] like Figure 1 , Figure 3 As shown, the oil tank 5 is equipped with a temperature control module 6, which regulates the temperature of the lubricating oil in the oil tank 5. By setting the temperature control module 6, the temperature of the lubricating oil in the oil tank 5 can be precisely regulated, so that the test can be carried out in different temperature environments, meet diverse test requirements, improve the comprehensiveness and accuracy of the test, and ensure the reliability of the performance test results of the device under test 3.

[0034] The temperature control module 6 includes a dual-effect cooling and heating unit 601 disposed outside the oil tank 5, and a heat exchange coil 602 disposed inside the oil tank 5. The heat exchange medium inlet of the dual-effect cooling and heating unit 601 is connected to the heat exchange medium outlet of the heat exchange coil 602, and the heat exchange medium outlet of the dual-effect cooling and heating unit 601 is connected to the heat exchange medium inlet of the heat exchange coil 602. By circulating the heat exchange medium between the dual-effect cooling and heating unit 601 and the heat exchange coil 602, heat exchange occurs with the lubricating oil in the oil tank 5. In this embodiment, the dual-effect cooling and heating unit 601 has a built-in 20kW heater and a water-cooled condenser. The dual-effect cooling and heating unit 601 is also electrically connected to a temperature transmitter 603 disposed inside the oil tank 5 to supply power to the temperature transmitter 603, which is used to detect the temperature of the lubricating oil in the oil tank 5.

[0035] The oil tank 5 is equipped with a circulating filter module 7, which circulates and filters the lubricating oil in the oil tank 5. The circulating filter module 7 includes a circulating filter pipe assembly 703 with both ends connected to the inside of the oil tank 5. A circulating pump 701 and a continuous filter device 702 are respectively installed on the circulating filter pipe assembly 703. In this embodiment, one end of the circulating filter pipe assembly 703 is located at the upper position inside the oil tank 5, and the other end is located at the lower position inside the oil tank 5. The circulating pump 701 provides driving force for the lubricating oil in the oil tank 5, so that the lubricating oil flows from bottom to top in the circulating filter pipe assembly 703. Specifically, the lubricating oil in the oil tank 5 flows into the circulating filter pipe assembly 703 through the lower end of the circulating filter pipe assembly 703, is filtered by the continuous filter device 702, and then flows into the oil tank 5 through the upper end of the circulating filter pipe assembly 703, thereby achieving the filtration of the lubricating oil in the oil tank 5. By setting up the circulating filtration module 7, the lubricating oil in the oil tank 5 can be continuously filtered and purified to ensure the cleanliness of the test oil and improve the accuracy of the test. In addition, filters are installed on both the dynamic test tube group 13 and the inlet tube group 15 to further filter the lubricating oil in the corresponding pipelines to ensure the cleanliness of the lubricating oil entering the device under test 3.

[0036] An oil receiving base 4 is installed at the bottom of the oil tank 5. Both the oil receiving base 4 and the bottom wall of the oil tank 5 are equipped with drain pipe assemblies. A fourth valve is installed on each drain pipe assembly to control the opening and closing of the pipe assembly. The drain pipe assembly is used to drain the lubricating oil in the container.

[0037] like Figure 2 , Figure 3 As shown, the bottom of the device under test 3 is fitted with a device support module 8. The device support module 8 includes a first oil pan 801 for recovering the lubricating oil leaked from the device under test 3. A first filter screen is fitted on the top of the first oil pan 801 for filtering the lubricating oil during the recovery process. The oil outlet of the first oil pan 801 is connected to the oil tank 5 through a first return oil pipe assembly 803. A first return oil pump 802 is fitted on the first return oil pipe assembly 803 to pump the lubricating oil in the first oil pan 801 back into the oil tank 5.

[0038] like Figure 3 As shown, the performance testing system of this embodiment is also equipped with a hydraulic motor testing module 9, which is used to test the torque and speed of the motor assembly 902 under test. The output end of the motor assembly 902 under test is connected to the measuring fixture 903. The motor assembly 902 under test drives the measuring fixture 903 to rotate, thereby testing its output torque and speed. The lubricating oil required for the motor assembly 902 to drive the measuring fixture 903 to rotate can be provided by an external oil station or by the oil tank 5.

[0039] The hydraulic motor test module 9 includes a second oil pan 901 located at the bottom of the motor assembly 902 under test for leaking lubricating oil from the motor assembly 902 under test. A second filter screen is installed on the top of the second oil pan 901 for filtering the lubricating oil during the recovery process. A level gauge 904 is installed inside the second oil pan 901 to measure the level of the lubricating oil inside the second oil pan 901. The oil outlet of the second oil pan 901 is connected to the oil tank 5 through a second return oil pipe assembly 906. A second return oil pump 905 is installed on the second return oil pipe assembly 906 to pump the lubricating oil in the second oil pan 901 back into the oil tank 5.

[0040] In addition, both the first return oil pipe group 803 and the second return oil pipe group 906 are equipped with return oil filtration devices to filter the lubricating oil in the pipelines, so as to ensure the cleanliness of the lubricating oil flowing back into the oil tank 5.

[0041] In this embodiment, the dynamic test pipe assembly 13, backwash pipe assembly 14, inlet pipe assembly 15, outlet pipe assembly 16, connecting branch pipe 17, bypass branch pipe 18, outlet branch pipe 22, circulating filter pipe assembly 703, first return oil pipe assembly 803, and second return oil pipe assembly 906 can all be formed by splicing several short pipes or long pipes, depending on the specific usage and installation requirements. In addition, each pipeline is equipped with corresponding control valve components, which are configured according to the actual production requirements.

[0042] The performance testing system in this embodiment uses a PLC control module as the central control module. The PLC control module can control the working status of each oil pump and valve in the system according to various parameters (including temperature, pressure, flow and particle concentration parameters) collected by various sensors in the system. It can also communicate with the temperature control module 6 to regulate the lubricating oil temperature in the oil tank 5. In addition, the PLC control module communicates with the host computer to collect and record various data during the test process and upload them to the host computer, thereby facilitating data statistics and analysis by the staff.

[0043] Using the above-described lubricating oil filtration equipment performance testing system, this embodiment also provides a testing method, including the following steps: S1. Preparation: Ensure the temperature of the lubricating oil in the oil tank 5 is 20℃±5℃, the level of the lubricating oil in the oil tank 5 is in the high level range, and the particle sensor 10 is preheated. Specifically, the PLC control module controls the temperature control module 6 to adjust the lubricating oil temperature in the oil tank 5 to 20℃±5℃; The built-in level sensor in oil tank 5 shows that the lubricating oil level in oil tank 5 is 1300L (this level meets the requirements of dynamic working conditions). Particle sensor 10 is preheated for 5 minutes and calibrated to a detection accuracy of 6μm.

[0044] S2. Equipment clamping: According to the model of the device under test 3, adjust the spacing between the two support plates inside the adjustable bracket 23 so that the installation height of the inlet pipe assembly 15 corresponds to the installation height of the inlet, thereby realizing the quick docking between the inlet pipe assembly 15 and the inlet, and so that the installation height of the outlet pipe assembly 16 corresponds to the installation height of the outlet, thereby realizing the quick docking between the outlet pipe assembly 16 and the outlet. like Figure 2 As shown, the adjustable bracket 23 has at least two built-in support plates. The two adjacent support plates are supported by hydraulic rods. By adjusting the output stroke of the hydraulic rods, the distance between the two adjacent support plates is adjusted, thereby adjusting the distance between the inlet pipe group 15 and the outlet pipe group 16, which are supported by the two support plates respectively, so that the distance between the inlet pipe group 15 and the outlet pipe group 16 can match the distance between the inlet and outlet of the corresponding device under test 3. Both the inlet pipe assembly 15 and the outlet pipe assembly 16 are equipped with connecting flanges 24. By setting connecting flanges 24, quick disassembly and assembly between the inlet pipe assembly 15 and the inlet, and between the outlet pipe assembly 16 and the outlet can be achieved, effectively improving testing efficiency. The backwash pipe assembly 14 is also equipped with connecting flanges 24 (not shown in the attached figure) at its end, which is used to achieve quick disassembly and assembly with the backwash port. In this embodiment, the device under test 3 is a lubricating oil filter, specifically, an automatic lubricating oil filter of model DD, with dimensions of 710mm×488mm×1137mm, a full load weight of 233kg, and a maximum allowable working pressure of 32bar. To match this model of lubricating oil filtration equipment, the distance between the two support plates of the adjustable bracket 23 is adjusted to 710mm. Then, the DD type filter is hoisted to the top of the equipment support module 8 using a 500kg gantry crane. Twelve M12×30mm socket head cap screws (8.8 grade) are used to quickly connect the inlet pipe assembly 15 to the inlet, the outlet pipe assembly 16 to the outlet, and the backwash pipe assembly 14 to the backwash port. The PLC control module controls the external air supply equipment to introduce 0.5 bar of compressed air into the system and maintain the pressure for 30 seconds to test the airtightness of the system pipeline. If the pressure does not drop, the pipeline is deemed to be sealed properly.

[0045] S3. Static pressure resistance test: Close the second valve 12, open the first valve 11, start the static test oil pump 1, and the static test oil pump 1 sends the lubricating oil in the oil tank 5 into the tested equipment 3 through the inlet pipe group 15 at a certain pressure. The pressure is gradually increased to the maximum allowable working pressure of the device under test 3 according to the PID control algorithm (i.e., proportional-integral-derivative control algorithm), and the pressure is maintained for the first set time. During the pressure maintenance period, the pressure at the inlet is collected in real time by the inlet pressure transmitter sensor 19, and the oil leakage at the inlet is monitored by the ultraviolet detection device. If the difference between the maximum real-time pressure value collected by the inlet pressure transmitter 19 and the minimum real-time pressure value collected by the inlet pressure transmitter 19, i.e., the pressure drop ≤ 0.5 bar, and no leakage occurs, then the static pressure resistance test is deemed to be qualified. Otherwise, the static pressure resistance test will fail. Specifically, the first set time is 15 minutes. In this embodiment, the maximum allowable working pressure of the device under test 3 is 32 bar. The ultraviolet light output by the ultraviolet detection device has a wavelength of 254 nm. When scanning the flange interface, lubricating oil leakage will produce a fluorescent reaction. If no fluorescence is produced, it indicates that there is no leakage at the connection. The static pressure resistance test results of the lubricating oil filtration equipment in this embodiment are as follows: the pressure drop displayed by the host computer is 0.3 bar; and no fluorescence reaction is generated by the ultraviolet detection device, then the static pressure resistance test is qualified.

[0046] S4. Dynamic filtration performance test: Open the first valve 11 and the second valve 12, start the dynamic test oil pump 2, and the dynamic test oil pump 2 sends the lubricating oil in the oil tank 5 into the tested equipment 3 through the dynamic test pipe group 13 and the inlet pipe group 15 in sequence according to a certain pressure. After being filtered by the tested equipment 3, it flows back into the oil tank 5 through the outlet pipe group 16. A flow detection component is installed on the outlet pipe assembly 16. When the flow detection component detects that the flow rate of the lubricating oil in the outlet pipe assembly 16 has stabilized to the output flow design value of the device under test 3, the particle sensor 10 is turned on. The particle sensor 10 detects the particle concentration of the lubricating oil in the outlet pipe assembly 16 and continues to detect the particle concentration for a second set time. During the particle concentration detection by the particle sensor 10, the pressure at the inlet is collected in real time by the inlet pressure transmitter sensor 19 and the pressure at the outlet is collected in real time by the outlet pressure transmitter sensor 20. If the particle concentration values ​​collected by particle sensor 10 all meet the design requirements of the device under test 3, and the difference between the maximum real-time pressure collected by inlet pressure transmitter 19 and the minimum real-time pressure collected by outlet pressure transmitter 20, i.e., the filtration pressure drop ≤ 2 bar, then the dynamic filtration performance test is deemed qualified. Otherwise, the dynamic filtration performance test will fail; In this embodiment, specifically, the second set time is 15 minutes. The opening of the first valve 11 stabilizes the pressure of the lubricating oil at the inlet at 16 bar, and the opening of the second valve 12 stabilizes the pressure of the lubricating oil at the outlet at 16 bar. The flow meter installed on the outlet pipe assembly 16 displays the fluid flow rate in the pipeline as 370 L / min (fluctuation ±5 L / min). The dynamic filtration performance test results of the lubricating oil filtration device in this embodiment are as follows: the initial ISO level of the particle concentration value collected by the particle sensor 10 is 18 / 16 / 13, and the ISO level drops to 15 / 13 / 10 after 15 minutes, and the filtration pressure drop is 1.8 bar. Therefore, the dynamic filtration performance test is qualified.

[0047] S5. Backwashing performance test: Backwash the tested equipment 3 and monitor the lubricating oil pressure and flow rate at the backwash port during backwashing. A backwashing valve is installed at the backwash port. During backwashing, the opening degree of the backwashing valve makes the lubricating oil pressure at the backwash port stable at 14 bar. Before backflushing, start the dynamic test oil pump 2 so that the lubricating oil in the oil tank 5 flows back into the oil tank 5 through the dynamic test pipe group 13, the inlet pipe group 15, the device under test 3, and the outlet pipe group 16 in sequence. The particle concentration of the lubricating oil in the outlet pipe group 16 is detected by the particle sensor 10 to obtain the first particle concentration value group. After backwashing is completed, the dynamic test oil pump 2 is started, so that the lubricating oil in the oil tank 5 flows back into the oil tank 5 through the dynamic test pipe group 13, the inlet pipe group 15, the tested equipment 3, and the outlet pipe group 16 in sequence. The particle concentration of the lubricating oil in the outlet pipe group 16 is detected by the particle sensor 10, thereby obtaining the second particle concentration value group. The backwashing particle removal rate is calculated by comparing the first set of particle concentration values ​​with the second set of particle concentration values. If the fluctuation of lubricating oil pressure and lubricating oil flow rate at the backflushing port is ≤±5% during backflushing, and the backflushing particle removal rate is ≥95%, then the backflushing performance test is deemed qualified. Otherwise, the backwashing performance test is deemed unqualified; The backwashing performance test results of the lubricating oil filtration equipment in this embodiment are as follows: the flow meter on the backwash pipe assembly 14 shows that the fluid flow rate in the pipeline is 60L / min (fluctuation ±0.5L / min), and the flow meter installed on the outlet pipe assembly 16 shows that the fluid flow rate in the pipeline is 370L / min (fluctuation ±5L / min); the ISO level corresponding to the first particle concentration value group is 15 / 13 / 10, the ISO level corresponding to the second particle concentration value group is 14 / 12 / 9, and the backwashing particle removal rate is 96%, so the backwashing particle removal rate is qualified.

[0048] S6. After the static pressure resistance test, dynamic filtration performance test and / or backwashing performance test are completed, the lubricating oil in the tested equipment 3 is emptied by the vacuum pump built into the tested equipment 3. Then the equipment support module 8 is disassembled. Finally, the tested equipment 3 is hoisted to the storage area and the test system is reset to standby state. When the tested device 3 is emptied, the emptying time is ≤3 minutes, and after emptying, the residual oil in the tested device 3 is ≤50ml; In addition, the built-in vacuum pump of the device under test 3 can also provide drive during the backwashing process.

[0049] In this embodiment, all parts that come into contact with lubricating oil (such as flanges, pipes, etc.) are made of 316 stainless steel, which is resistant to oil corrosion and ensures that the service life of the performance testing system is extended by more than five years.

[0050] The above description is an explanation of the present invention and not a limitation thereof. The scope of the present invention is defined by the claims. Within the scope of protection of the present invention, any form of modification may be made.

Claims

1. A performance testing system for lubricating oil filtration equipment, characterized in that: The device under test (3) is equipped with an inlet, an outlet and a backwash port. A first valve (11) and an inlet pressure transmitter sensor (19) are installed at the inlet, and a second valve (12) and an outlet pressure transmitter sensor (20) are installed at the outlet. The inlet is connected to the oil tank (5) through the inlet pipe assembly (15). A static test oil pump (1) is installed on the inlet pipe assembly (15). When performing static performance testing, the static test oil pump (1) draws the lubricating oil in the oil tank (5) and sends it to the device under test (3) through the inlet pipe assembly (15). The inlet pipe assembly (15) is connected to a dynamic test pipe assembly (13), the end of which extends into the oil tank (5). A dynamic test oil pump (2) is installed on the dynamic test pipe assembly (13). When performing dynamic performance testing, the dynamic test oil pump (2) draws lubricating oil from the oil tank (5) and sends it through the dynamic test pipe assembly (13) and the inlet pipe assembly (15) to the device under test (3). The outlet is connected to the oil tank (5) through the outlet pipe assembly (16). A particle sensor (10) is installed on the outlet pipe assembly (16). The lubricating oil in the tested device (3) flows into the oil tank (5) through the outlet pipe assembly (16). The outlet pipe assembly (16) is connected to the backwash pipe assembly (14), the end of the backwash pipe assembly (14) is connected to the backwash port, and the inlet pipe assembly (15) is connected to the bypass branch pipe (18). The end of the bypass branch pipe (18) extends into the oil tank (5). The lubricating oil in the oil tank (5) flows into the tested equipment (3) through the outlet pipe assembly (16) and the backwash pipe assembly (14) in sequence, and then flows back into the oil tank (5) through the inlet pipe assembly (15) and the bypass branch pipe (18), thereby performing backwashing.

2. The performance testing system for lubricating oil filtration equipment as described in claim 1, characterized in that: The oil tank (5) is an open-type oil tank with an open opening, and the volume of the oil tank (5) is 1500L.

3. The performance testing system for lubricating oil filtration equipment as described in claim 1, characterized in that: The oil tank (5) is equipped with a temperature control module (6), which regulates the temperature of the lubricating oil in the oil tank (5).

4. The performance testing system for lubricating oil filtration equipment as described in claim 3, characterized in that: The temperature control module (6) includes a cooling and heating dual-effect unit (601) arranged outside the oil tank (5) and a heat exchange coil (602) arranged inside the oil tank (5). The heat exchange medium inlet of the dual-effect cooling and heating unit (601) is connected to the heat exchange medium outlet of the heat exchange coil (602), and the heat exchange medium outlet of the dual-effect cooling and heating unit (601) is connected to the heat exchange medium inlet of the heat exchange coil (602). By circulating the heat exchange medium between the dual-effect cooling and heating unit (601) and the heat exchange coil (602), heat exchange is performed with the lubricating oil in the oil tank (5).

5. The performance testing system for lubricating oil filtration equipment as described in claim 1, characterized in that: The oil tank (5) is equipped with a circulating filter module (7), which circulates and filters the lubricating oil in the oil tank (5). The circulating filter module (7) includes a circulating filter tube assembly (703) with both ends connected to the inside of the oil tank (5). A circulating pump (701) and a continuous filter device (702) are respectively installed on the circulating filter tube assembly (703).

6. A testing method using the lubricating oil filtration equipment performance testing system as described in claim 1, characterized in that: Includes the following steps: S1. Preparation work: ensure that the temperature of the lubricating oil in the oil tank (5) is 20℃±5℃, the level of the lubricating oil in the oil tank (5) is in the high level range, and the particle sensor (10) is preheated. S2. Equipment clamping: According to the model of the equipment under test (3), adjust the spacing between the two support plates in the adjustable bracket (23) so that the installation height of the inlet pipe assembly (15) corresponds to the installation height of the inlet, thereby realizing the rapid docking between the inlet pipe assembly (15) and the inlet, and so that the installation height of the outlet pipe assembly (16) corresponds to the installation height of the outlet, thereby realizing the rapid docking between the outlet pipe assembly (16) and the outlet. S3. Static pressure resistance test: close the second valve (12), open the first valve (11), start the static test oil pump (1), and the static test oil pump (1) sends the lubricating oil in the oil tank (5) into the tested equipment (3) through the inlet pipe group (15) at a certain pressure. The pressure is gradually increased to the maximum allowable working pressure of the device under test (3) according to the PID control algorithm, and the pressure is maintained for the first set time. During the pressure maintenance period, the pressure at the inlet is collected in real time by the inlet pressure transmitter sensor (19), and the oil leakage at the inlet is monitored by the ultraviolet detection device. If the difference between the maximum real-time pressure collected by the inlet pressure transmitter (19) and the minimum real-time pressure collected by the inlet pressure transmitter (19), i.e., the pressure drop is ≤0.5 bar, and there is no leakage, then the static pressure resistance test is deemed to be qualified. Otherwise, the static pressure resistance test will fail. S4. Dynamic filtration performance test: Open the first valve (11) and the second valve (12), start the dynamic test oil pump (2), and the dynamic test oil pump (2) sends the lubricating oil in the oil tank (5) into the tested equipment (3) through the dynamic test pipe group (13) and the inlet pipe group (15) according to a certain pressure. After being filtered by the tested equipment (3), it flows back into the oil tank (5) through the outlet pipe group (16). A flow detection component is installed on the outlet pipe assembly (16). When the flow detection component detects that the flow rate of the lubricating oil in the outlet pipe assembly (16) has stabilized to the output flow design value of the device under test (3), the particle sensor (10) is turned on. The particle concentration of the lubricating oil in the outlet pipe assembly (16) is detected by the particle sensor (10). The particle concentration is continuously detected according to the second set time. During the particle concentration detection by the particle sensor (10), the pressure at the inlet is collected in real time by the inlet pressure transmitter sensor (19), and the pressure at the outlet is collected in real time by the outlet pressure transmitter sensor (20). If the particle concentration values ​​collected by the particle sensor (10) meet the design requirements of the device under test (3), and the difference between the maximum value of the real-time pressure collected by the inlet pressure transmitter (19) and the minimum value of the real-time pressure collected by the outlet pressure transmitter (20), i.e., the filtration pressure drop is ≤2 bar, then the dynamic filtration performance test is deemed to be qualified. Otherwise, the dynamic filtration performance test will fail; S5. Backwashing performance test: Backwash the equipment under test (3) and monitor the lubricating oil pressure and lubricating oil flow rate at the backwashing port during the backwashing period; Before backwashing, start the dynamic test oil pump (2) so that the lubricating oil in the oil tank (5) flows back into the oil tank (5) through the dynamic test pipe group (13), the inlet pipe group (15), the device under test (3), and the outlet pipe group (16). The particle concentration of the lubricating oil in the outlet pipe group (16) is detected by the particle sensor (10) to obtain the first particle concentration value group. After backwashing is completed, the dynamic test oil pump (2) is started, so that the lubricating oil in the oil tank (5) flows back to the oil tank (5) through the dynamic test pipe group (13), the inlet pipe group (15), the device under test (3), and the outlet pipe group (16). The particle concentration of the lubricating oil in the outlet pipe group (16) is detected by the particle sensor (10), thereby obtaining the second particle concentration value group. The backwashing particle removal rate is calculated by comparing the first set of particle concentration values ​​with the second set of particle concentration values. If the fluctuation of lubricating oil pressure and lubricating oil flow rate at the backflushing port is ≤±5% during backflushing, and the backflushing particle removal rate is ≥95%, then the backflushing performance test is deemed qualified. Otherwise, the backwashing performance test is deemed unqualified; S6. After the static pressure resistance test, dynamic filtration performance test and / or backwashing performance test are completed, the lubricating oil in the tested equipment (3) is emptied by the vacuum pump built into the tested equipment (3), then the equipment support module (8) is disassembled, and finally the tested equipment (3) is hoisted to the storage area, and the testing system is reset to standby state.

7. The detection method as described in claim 6, characterized in that: Both the first and second set times are 15 minutes.

8. The detection method as described in claim 6, characterized in that: In the dynamic filtration performance test, the opening degree of the first valve (11) makes the pressure of the lubricating oil at the inlet stabilize at 16 bar, and the opening degree of the second valve (12) makes the pressure of the lubricating oil at the outlet stabilize at 16 bar.

9. The detection method as described in claim 6, characterized in that: A backflushing valve is installed at the backflushing port. During backflushing, the opening of the backflushing valve keeps the pressure of the lubricating oil at the backflushing port stable at 14 bar.

10. The detection method as described in claim 6, characterized in that: When the tested device (3) is emptied, the emptying time is ≤3 minutes, and after emptying, the residual oil in the tested device (3) is ≤50ml.

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