A comprehensive performance test device for engine oil-gas separator

Abstract

The present invention discloses a comprehensive performance test device for an engine oil-gas separator, including an air supply system, an oil supply system, a flow limiting valve, an oil-gas mixing pressure regulating box, a high-speed camera, a vortex flowmeter, a pressure differential gauge, an absolute filter, a digital control platform, an oil return valve and an oil collector; the oil-gas mixing pressure regulating box has an oil return port 1, an air inlet, an air outlet and an oil return port 2; the air supply system is used to provide compressed air to the oil-gas mixing pressure regulating box; the oil supply system is used to provide high-pressure engine oil to the oil-gas mixing pressure regulating box. The present invention can accurately simulate the actual working conditions of the oil-gas separator, fully consider the influence of the gas pressure in the engine crankcase and the state of the oil-gas mixture, accurately control the changes of various parameters such as flow rate and temperature during the test process, accurately test the performance parameters such as separation efficiency, pressure loss and durability of the oil-gas separator, display and record the change history of various parameters during the test process, and realize the test of the comprehensive performance of the oil-gas separator.

Description

Technical Field

[0001] The invention belongs to the field of vehicle engine oil-gas separators, in particular to a comprehensive performance testing device for an engine oil-gas separator. Background Art

[0002] The oil-gas separator is installed next to the engine crankcase to separate the oil from the oil-gas mixture discharged from the engine crankcase, and return the separated oil to the oil pan for reuse, reducing the oil discharged from the crankcase breathing port into the air, thereby reducing the oil consumption and air pollution caused. The increase in the power level of automotive engines has led to a significant increase in the oil-gas mixture flow rate in the crankcase and the concentration of oil mist in the mixture. The comprehensive performance of the oil-gas separator, such as separation efficiency, pressure loss and durability, directly affects the oil-gas separation efficiency and the lubrication and air pressure status in the crankcase. There are many types of oil-gas separator designs and their performance varies. How to accurately test the comprehensive performance of these oil-gas separators is crucial.

[0003] Existing oil-gas separator testing devices and testing methods lack unified standards. On the test bench, the performance of the oil-gas separator is often only tested on the mixture concentration, temperature and flow rate under specific conditions. During the test process, the changes in the oil-gas mixture flow rate caused by changes in engine working conditions, the oil return resistance caused by the connection between the oil return port of the oil-gas separator and the crankcase, and the oil-gas mixing state under different flow and temperature conditions during the test are usually ignored. As a result, the test results are quite different from the engine whole machine test results, or the quality of the engine oil in the mixture entering the oil-gas separator cannot be accurately measured. The device and test method do not take into account the problems of mixture temperature, oil mist state and pressure changes caused by the connection between the oil-gas separator and the oil pan. Summary of the invention

[0004] In view of the deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a comprehensive performance testing device for an engine oil-gas separator.

[0005] The technical solution of the present invention to solve the technical problem is to provide a comprehensive performance test device for an engine oil-gas separator, characterized in that the test device comprises an air supply system, an oil supply system, a flow limiting valve, an oil-gas mixing pressure stabilizing box, a high-speed camera, a vortex flowmeter, a pressure differential gauge, an absolute filter, a digital control platform, an oil return valve and an oil collector; the oil-gas mixing pressure stabilizing box has an oil return port 1, an air inlet, an air outlet and an oil return port 2;

[0006] The air supply system is used to provide compressed air to the oil-gas mixing pressure stabilizing tank, and is connected to the air inlet of the oil-gas mixing pressure stabilizing tank through a pipeline, and a flow limiting valve is arranged on the pipeline;

[0007] A high-speed camera is arranged on the top of the oil-gas mixing pressure stabilizing box, and is used to take images of oil droplets atomized in the oil-gas mixing gas in the oil-gas mixing pressure stabilizing box;

[0008] The air outlet of the oil-gas mixture pressure stabilizing box is connected to the air inlet of the oil-gas separator to be tested through a pipeline, and a vortex flowmeter is arranged on the pipeline, which is used to monitor the flow rate of the oil-gas mixture entering the oil-gas separator to be tested; the air outlet of the oil-gas separator to be tested is connected to the air inlet of the absolute filter through a pipeline; the air outlet of the absolute filter is used to discharge pure gas into the air, and the absolute filter is used to filter and collect the unseparated engine oil in the gas discharged through the air outlet of the oil-gas separator to be tested; the high-pressure end interface of the differential pressure gauge The low-pressure end interface is respectively connected to the air inlet and air outlet of the oil-gas separator to be tested, so as to monitor the pressure data of the air inlet and air outlet of the oil-gas separator to be tested and the pressure loss data of the oil-gas mixture after flowing through the oil-gas separator to be tested; the oil return port of the oil-gas separator to be tested is connected to the oil collector through the oil return pipeline, and the oil collector is used to collect the engine oil separated by the oil-gas separator to be tested; the oil return port of the oil-gas mixture pressure stabilizing tank is connected to the oil collector through the same pressure pipeline, so that the air pressure of the oil-gas separator to be tested is the same as that of the oil-gas mixture pressure stabilizing tank;

[0009] An atomizing nozzle is provided on the oil-gas mixing pressure stabilizing box; the oil outlet of the oil supply system is connected to the inlet of the atomizing nozzle, which is used to provide high-pressure engine oil to the oil-gas mixing pressure stabilizing box; the outlet of the atomizing nozzle is located in the oil-gas mixing pressure stabilizing box, which is used to atomize the engine oil provided by the oil supply system, and the atomized engine oil in the oil-gas mixing pressure stabilizing box is mixed with the compressed air provided by the air supply system to form an oil-gas mixture; the oil return port 2 of the oil-gas mixing pressure stabilizing box is connected to the oil return port of the oil supply system through a pipeline, and an oil return valve is provided on the pipeline;

[0010] The digital control platform is respectively connected to the flow limiting valve, the high-speed camera, the vortex flowmeter, the differential pressure gauge and the oil return valve for communication.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] (1) The present invention can accurately simulate the actual working conditions of the oil-gas separator, fully consider the influence of the gas pressure in the engine crankcase and the state of the oil-gas mixture, accurately control the changes of various parameters such as flow rate and temperature during the test, accurately, stably and efficiently test the performance parameters such as separation efficiency, pressure loss and durability of the oil-gas separator, display and record the change history of various parameters during the test, and realize the test of the comprehensive performance of the oil-gas separator.

[0013] (2) The present invention connects the oil return port of the oil-gas separator with the oil-gas mixing pressure stabilizing tank, taking into account the effect of the gas pressure in the engine crankcase on the separation efficiency of the oil-gas separator, making the gas pressure environment in the oil-gas separator closer to the actual situation and the test result more accurate.

[0014] (3) The present invention sets a high-speed camera to study the changes in the state of the mixed gas oil mist under different gas flow rates and different oil content conditions and the performance of the oil-gas separator under different mixed gas oil mist conditions from a more microscopic perspective, providing a testing basis and conditions for further in-depth research.

[0015] (4) The pressure regulating nozzle of the present invention is connected to the air pump and the oil pump at the same time, and the engine oil is sprayed out through gas pressure, which effectively improves the atomization effect of the engine oil and makes the oil mist in the mixed gas finer and the oil particles more uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0017] In the figure, motor speed regulator 1, high-pressure fan 2, flow limiting valve 3, pressure regulating nozzle 4, oil-gas mixing pressure stabilizing box 5, high-speed camera 6, air pump 7, pressure relief valve 8, oil pump 9, heater 10, oil tank 11, temperature gauge 12, liquid level sensor 13, vortex flowmeter 14, oil-gas separator to be tested 15, differential pressure gauge 16, absolute filter 17, digital control platform 18, oil return valve 19, atomizing nozzle 20, oil collector 21;

[0018] Oil return port 1 501 , air inlet 502 , air outlet 503 , oil return port 2 504 , same pressure pipeline 22 , and oil return pipeline 23 . DETAILED DESCRIPTION

[0019] The specific embodiments of the present invention are given below. The specific embodiments are only used to further illustrate the present invention in detail and do not limit the protection scope of the claims of this application.

[0020] The present invention provides a comprehensive performance test device for an engine oil-gas separator (hereinafter referred to as the test device), characterized in that the test device comprises an air supply system, an oil supply system, a flow limiting valve 3, an oil-gas mixing pressure stabilizing box 5, a high-speed camera 6, a vortex flowmeter 14, a pressure differential gauge 16, an absolute filter 17, a digital control platform 18, an oil return valve 19 and an oil collector 21; the oil-gas mixing pressure stabilizing box 5 has an oil return port 1 501, an air inlet 502, an air outlet 503 and an oil return port 2 504;

[0021] The air supply system is used to provide stable compressed air to the oil-gas mixing pressure stabilizing tank 5, and is connected to the air inlet 502 of the oil-gas mixing pressure stabilizing tank 5 through a pipeline, and a flow limiting valve 3 is arranged on the pipeline; the opening of the flow limiting valve 3 is controlled manually or through the digital control platform 18 to adjust the amount of compressed air entering the oil-gas mixing pressure stabilizing tank 5 from the air supply system. When the flow limiting valve 3 is manually controlled, the digital control platform 18 receives the opening signal of the flow limiting valve 3 in real time;

[0022] A high-speed camera 6 is arranged on the top of the oil-gas mixture pressure stabilizing box 5. The high-speed camera 6 is used to take pictures of the oil droplet atomization image in the oil-gas mixture in the oil-gas mixture pressure stabilizing box 5. The digital control platform 18 controls the high-speed camera 6 to adjust the focal length, take pictures, record videos, etc., and receives, stores, displays and processes the oil droplet atomization image in the oil-gas mixture pressure stabilizing box 5 taken by the high-speed camera 6 in real time to observe the oil droplet diameter, atomization state, etc. in the oil-gas mixture;

[0023] The gas outlet 503 of the oil-gas mixture pressure stabilizing box 5 is connected to the gas inlet of the oil-gas separator 15 to be tested through a pipeline, and a vortex flowmeter 14 is provided on the pipeline, and the vortex flowmeter 14 is used to monitor the flow of the oil-gas mixture entering the oil-gas separator 15 to be tested; the digital control platform 18 receives the intake flow data transmitted by the vortex flowmeter 14, monitors the flow of the oil-gas mixture entering the oil-gas separator 15 to be tested in real time, and controls the opening of the flow limiting valve 3 to adjust the flow;

[0024] The air outlet of the oil-gas separator 15 to be tested is connected to the air inlet of the absolute filter 17 through a pipeline; the air outlet of the absolute filter 17 is used to discharge pure gas into the air, and the absolute filter 17 is used to filter and collect the unseparated engine oil in the mixed gas discharged through the air outlet of the oil-gas separator 15 to be tested; the high-pressure end interface and the low-pressure end interface of the differential pressure gauge 16 are respectively connected to the air inlet and the air outlet of the oil-gas separator 15 to be tested, so as to monitor the pressure data of the air inlet and the air outlet of the oil-gas separator 15 to be tested and the pressure loss data of the oil-gas mixed gas after flowing through the oil-gas separator 15 to be tested, and the digital control platform 18 receives the data transmitted by the differential pressure gauge 16 and monitors it in real time;

[0025] The oil return port of the oil-gas separator 15 to be tested is connected to the oil collector 21 through the oil return pipeline 23, and the oil collector 21 is used to collect the engine oil separated by the oil-gas separator 15 to be tested; the oil return port 501 of the oil-gas mixing pressure stabilizing tank 5 is connected to the oil collector 21 through the same pressure pipeline 22, so that the oil return port of the oil-gas separator 15 to be tested is connected to the oil return port 501 of the oil-gas mixing pressure stabilizing tank 5, so that the gas pressure of the oil-gas separator 15 to be tested is the same as that of the oil-gas mixing pressure stabilizing tank 5, so as to simulate the actual situation of the crankcase and the oil-gas separator in the engine being connected;

[0026] An atomizing nozzle 20 is provided on the oil-gas mixing pressure stabilizing tank 5; the oil outlet of the oil supply system is connected to the inlet of the atomizing nozzle 20, so as to provide stable high-pressure engine oil to the oil-gas mixing pressure stabilizing tank 5; the outlet of the atomizing nozzle 20 is located in the oil-gas mixing pressure stabilizing tank 5, so as to atomize the engine oil provided by the oil supply system, and the atomized engine oil in the oil-gas mixing pressure stabilizing tank 5 is mixed with the compressed air provided by the air supply system to form an oil-gas mixture; the oil return port 2 504 of the oil-gas mixing pressure stabilizing tank 5 is connected to the oil return port of the oil supply system through a pipeline, and an oil return valve 19 is provided on the pipeline, and the digital control platform 18 controls the opening and closing of the oil return valve 19 to discharge the residual engine oil in the oil-gas mixing pressure stabilizing tank 5 (including the engine oil not mixed with the gas and the engine oil separated by the oil-gas separator 15 to be tested and returned to the oil-gas mixing pressure stabilizing tank 5 through the oil collector 21) into the oil supply system;

[0027] The digital control platform 18 is communicatively connected with the flow limiting valve 3 , the high-speed camera 6 , the vortex flowmeter 14 , the differential pressure gauge 16 and the oil return valve 19 , respectively.

[0028] Preferably, the position of the oil return port 1 501 is higher than the bottom of the oil-gas mixing pressure stabilizing tank 5 and not higher than the gas outlet 503 ; the oil return port 2 504 is located at the bottom of the oil-gas mixing pressure stabilizing tank 5 .

[0029] Preferably, the atomizing nozzle 20 is located adjacent to the air inlet 502 , and is located above or below the air inlet 502 ; when located above the air inlet 502 , the atomizing nozzle 20 sprays downward, and when located below the air inlet 502 , the atomizing nozzle 20 sprays upward.

[0030] Preferably, the functions of the oil return port 501 are: (1) to return the oil separated by the oil-gas separator 15 to be tested; and (2) to simulate the pressure conditions in the crankcase and detect whether the oil return port at the bottom of the oil-gas separator 15 to be tested can still return oil smoothly when there is high pressure.

[0031] Preferably, the oil collector 21 is a sealed space.

[0032] Preferably, the air supply system includes a motor speed regulator 1 and a high-pressure fan 2; the high-pressure fan 2 is connected to the air inlet 502 of the oil-gas mixing pressure stabilizing tank 5 through a pipeline, and a limiting flow valve 3 is provided on the pipeline to adjust the amount of compressed air entering the oil-gas mixing pressure stabilizing tank 5 from the high-pressure fan 2; the motor speed regulator 1 controls the input voltage of the high-pressure fan 2, adjusts the flow rate of compressed air generated by the high-pressure fan 2, and meets the test conditions of the oil-gas mixture under different intake flow rates.

[0033] Preferably, the oil supply system includes a pressure regulating nozzle 4, an air pump 7, a pressure relief valve 8, an oil pump 9, a heater 10, an oil tank 11, a thermometer 12 and a liquid level sensor 13;

[0034] The oil tank 11 is used to store engine oil; the heater 10 is connected to the oil tank 11 through an electric heating pipe, and is used to heat the oil in the oil tank 11 to simulate engine oil at different temperatures; the thermometer 12 and the liquid level sensor 13 are both arranged inside the oil tank 11, and are respectively used to monitor the oil temperature and oil volume in the oil tank 11 in real time, and the digital control platform 18 receives the data transmitted by the liquid level sensor 13 and monitors it in real time, and the digital control platform 18 receives the data transmitted by the thermometer 12, monitors the oil temperature in the oil tank 11 in real time and automatically controls the heater 10 to adjust the oil temperature to the specified temperature value for the test; the oil outlet of the oil tank 11 is connected to the oil inlet of the pressure regulating nozzle 4 through a pipeline, and an oil pump 9 and a pressure relief valve 8 are arranged on the pipeline; the pressure relief valve 8 is used to adjust the oil temperature in the pressure regulating nozzle 4. When the oil pressure at the pressure regulating nozzle 4 exceeds the preset pressure value, it is opened to reduce the oil pressure; the air pump 7 is connected to the air inlet of the pressure regulating nozzle 4, and the air pump 7 is used to pressurize the engine oil in the pressure regulating nozzle 4 so that it is evenly sprayed into the oil-gas mixing pressure stabilizing tank 5 according to a certain oil supply pressure; the digital control platform 18 monitors the oil pressure at the pressure regulating nozzle 4 in real time and adjusts it by controlling the air pump 7; the oil outlet of the pressure regulating nozzle 4 is connected to the inlet of the atomizing nozzle 20; the pressure regulating nozzle 4 can adjust the flow rate of the engine oil sprayed into the oil-gas mixing pressure stabilizing tank 5; the return oil port 2504 of the oil-gas mixing pressure stabilizing tank 5 is connected to the return oil port of the oil tank 11 through a pipeline, and a return oil valve 19 is provided on the pipeline, which is used to discharge the residual engine oil in the oil-gas mixing pressure stabilizing tank 5 into the oil tank 11.

[0035] Preferably, the oil outlet of the oil tank 11 is connected to the oil inlet of the pressure regulating nozzle 4 through a pipeline, and an oil pump 9 and a pressure relief valve 8 are arranged on the pipeline in sequence according to the direction of oil flow. When the oil pump pressure is greater than the required oil pressure, the pressure relief valve 8 needs to be opened to relieve the pressure, so the pressure relief valve 8 is installed behind the oil pump 9.

[0036] Preferably, the digital control platform 18 is communicatively connected with the flow limiting valve 3, the pressure regulating nozzle 4, the high-speed camera 6, the air pump 7, the heater 10, the temperature meter 12, the liquid level sensor 13, the vortex flowmeter 14, the differential pressure meter 16 and the oil return valve 19 respectively.

[0037] Preferably, the liquid level sensor 13 is arranged at the top of the inner wall of the oil tank 11; the head of the thermometer 12 is arranged at the top of the outer wall of the oil tank 11, and the sensor of the thermometer 12 is located in the oil level.

[0038] Preferably, the pressure regulating nozzle 4 has oil outlets of different sizes to adjust the diameter of the sprayed oil, thereby adjusting the flow rate of the oil sprayed into the oil-gas mixing pressure stabilizing tank 5 .

[0039] Preferably, the pressure relief valve 8 is a high-pressure pressure relief valve. The oil pump 9 is a vacuum oil pump. The liquid level sensor 13 is a high-temperature resistant liquid level sensor. The vortex flowmeter 14 is a temperature and pressure compensation vortex flowmeter to feed back the temperature of the oil-gas mixture to the digital control platform 18.

[0040] Preferably, the heating temperature range of the heater 10 is 0-200°C. The material of the fuel tank 11 is a high temperature resistant material, without any specific material restriction. The accuracy of the thermometer 12 is ±0.5°C. The reading of the vortex flowmeter 14 is accurate to ±0.1L / min. The reading of the differential pressure gauge 16 is accurate to ±0.1Pa. The material in the absolute filter 17 is a fiber material with deep filtration and adsorption effects, without any specific material restriction, and the measurement accuracy is 0.01g. All components, pipelines, instruments and meters should be of high temperature resistant type, and the assembly should not have defects such as deformation and damage after the temperature resistance test.

[0041] Preferably, the digital control platform 18 includes a master control computer and various sensor receivers, which can control various instruments and valves, and receive, record and process real-time data of various instruments. If high-temperature engine oil is used, the tester does not need to touch the various devices, but can operate through the digital control platform 18, and the readings of various instruments can be displayed through the digital control platform 18.

[0042] Preferably, the oil-gas separator 15 to be tested is mounted by clamping with a fixture, and different types of oil-gas separators can be clamped by changing the shape and number of the fixture.

[0043] The working principle of the present invention is as follows: the compressed air generated by the high-pressure fan 2 enters the oil-gas mixing pressure stabilizing tank 5 through the air inlet 502 through the flow limiting valve 3; the oil pump 9 extracts the engine oil from the oil tank 11, the digital control platform 18 controls the air pump 7 to change the oil pressure, and the digital control platform 18 controls the opening of the pressure regulating nozzle 4 to form high-pressure engine oil; the high-pressure engine oil is sprayed into the oil-gas mixing pressure stabilizing tank 5 and atomized by the atomizing nozzle 20 to form atomized engine oil; the atomized engine oil is mixed with the compressed air to form an oil-gas mixture, and the high-speed camera 6 photographs the state of the oil-gas mixture; the oil-gas mixture flows out from the gas outlet 503 of the oil-gas mixing pressure stabilizing box 5, enters the oil-gas separator 15 to be tested through the vortex flowmeter 14 for oil-gas separation, and the separated engine oil flows back from the oil return port of the oil-gas separator 15 through the oil return line 23 into the oil collector 21; the separated gas enters the absolute filter 17, and the residual engine oil in the gas will be completely filtered in the absolute filter 17, and the pure gas is discharged into the air through the gas outlet of the absolute filter 17.

[0044] The present invention also provides a testing method (hereinafter referred to as the method) based on the engine oil-gas separator comprehensive performance testing device, characterized in that the method comprises the following steps:

[0045] Step 1, under different environments, according to the load spectrum of the whole machine durability test of the target engine under the environment, the durability assessment spectrum of the oil-gas separator 15 to be tested is compiled: the total assessment period of the oil-gas separator 15 to be tested is the same as the total assessment period of the whole machine durability test of the target engine, and according to the changes and working time of the engine in the idle speed, maximum torque point speed, 80% rated speed, 85% rated speed, and maximum no-load speed range in a single assessment period, the spectrum block curve of the mixed gas flow rate, oil temperature, and oil mist state (matching of injection pressure and mixed gas flow rate) of the oil-gas separator 15 to be tested under different working conditions of the engine is determined and input into the digital control platform 18;

[0046] Step 2: Assemble the test device, install the oil-gas separator 15 to be tested, and weigh the mass of the absolute filter 17 and the oil collector 21 respectively:

[0047] The oil-gas separator 15 to be tested is clamped and installed by a fixture, assembled according to the structure and connection method of the test device, and checked whether each pipeline connection is normal and whether each instrument functions normally;

[0048] Weigh the masses of the absolute filter 17 and the oil collector 21 respectively, and record them in the computer of the digital control platform 18;

[0049] Step 3: Before the durability test begins, it is necessary to determine the change in the flow rate of the mixed gas in the engine crankcase and the state of the mixed gas under each test condition in the engine durability test spectrum. By observing the photos taken by the high-speed camera 6, the oil-gas mixture in the test device is manually adjusted to the optimal state under each test condition and the parameters corresponding to the flow limiting valve 3 and the pressure regulating nozzle 4 in the digital control platform 18 are determined. After determining the total test cycle, a single test cycle is cycled, including automatically adjusting the flow limiting valve 3 and the pressure regulating nozzle 4 according to the set test spectrum through the digital control platform 18 to achieve oil-gas matching in each state;

[0050] Step 4, start the durability test, turn on the high-pressure blower 2, adjust the input voltage of the high-pressure blower 2 through the motor speed regulator 1 to meet the maximum intake flow requirement of the test, and adjust the opening of the flow limiting valve 3 in real time through the digital control platform 18 according to the spectrum block curve of the mixed gas flow rate changing with time in the durability test spectrum of the oil-gas separator 15 to meet the intake flow requirement of the test;

[0051] The heater 10 is automatically controlled by the digital control platform 18 to make the oil temperature in the oil tank 11 reach the test condition. The temperature gauge 12, the pressure difference gauge 16 and the vortex flowmeter 14 are monitored in real time by the digital control platform 18. The values ​​thereof do not fluctuate greatly within the specified time (the amplitude of the value change does not exceed ±2% of the displayed value). The oil pump 9 and the air pump 7 are started. The digital control platform 18 adjusts the pressure of the oil sprayed into the oil-gas mixing stabilizing tank 5 by adjusting the air pump 7 and the pressure regulating nozzle 4 according to the spectrum block curve of the oil injection pressure change with time in the durability test spectrum of the oil-gas separator 15 to be tested. The oil is atomized by the atomizing nozzle 20. According to the image feedback of the high-speed camera 6, the atomization concentration and the spraying angle of the atomizing nozzle 20 are adjusted. The atomized oil is mixed with the compressed air to form an oil-gas mixture.

[0052] Step 5, the oil-gas mixture enters the oil-gas separator 15 to be tested through the gas outlet 503 for oil-gas separation, the vortex flowmeter 14 monitors the flow of the oil-gas mixture entering the oil-gas separator 15 to be tested in real time, and adjusts the inflow to the rated flow through the digital control platform 18; after completing the rated test time, the measurement data of the differential pressure meter 16 is recorded in the digital control platform 18 in real time, and observes whether there is oil bubbling or oil leakage at the gas outlet of the oil-gas separator to be tested during the test time, the change of pressure loss, whether the return oil flow is stable, and the change of separation efficiency of the oil-gas separator to be tested under different test cycles, so as to judge whether the durability of the oil-gas separator to be tested meets the requirements;

[0053] Step 6: After the test is completed, turn off each device;

[0054] The pressure data of the air inlet and the air outlet of the oil-gas separator 15 to be tested measured by the differential pressure gauge 16 are calculated, and the pressure loss value obtained is the pressure loss of the oil-gas separator;

[0055] Weigh the mass of the oil collector 21. The mass increase of the oil collector 21 is the mass m of the oil separated by the oil-gas separator 15 to be measured. 1 Weigh the mass of the absolute filter 17 to obtain the mass increase m of the absolute filter 17 2 ; The separation efficiency of the oil-gas separator is E = m 1 / m 1 +m 2 ;

[0056] The various parameters of the oil-gas separator 15 to be tested are recorded in the digital control platform 18 .

[0057] Preferably, during the test, the oil return valve 19 is normally closed; however, during the test, the liquid level sensor 13 monitors the changes in the liquid level in the oil tank 11 in real time. When the amount of oil in the oil tank 11 is less than 20% of the total oil storage, the liquid level sensor 13 reaches the warning line and issues an oil shortage warning. At this time, the oil tank needs to be refilled through the oil inlet of the oil tank 11.

[0058] Preferably, after the test is completed, when the digital control platform 18 receives a signal from the liquid level sensor 13 that the liquid level of the oil tank 11 is lower than the set value or reaches the set time, the digital control platform 18 controls the return oil valve 19 to open, and returns the residual oil in the oil-gas mixing pressure stabilizing tank 5 to the oil tank 11; when the liquid level of the oil tank 11 is higher than the set value or reaches the set time, the digital control platform 18 controls the return oil valve 19 to close.

[0059] Any matters not described in the present invention are applicable to the prior art.

Claims

1. An engine oil-gas separator comprehensive performance test device, characterized in that: The test device includes an air supply system, an oil supply system, a flow limiting valve, an oil-gas mixing pressure stabilizing box, a high-speed camera, a vortex flowmeter, a differential pressure gauge, an absolute filter, a digital control platform, an oil return valve and an oil collector; the oil-gas mixing pressure stabilizing box has an oil return port 1, an air inlet, an air outlet and an oil return port 2; The air supply system is used to provide compressed air to the oil-gas mixing pressure stabilizing tank, and is connected to the air inlet of the oil-gas mixing pressure stabilizing tank through a pipeline, and a flow limiting valve is arranged on the pipeline; A high-speed camera is arranged on the top of the oil-gas mixing pressure stabilizing box, and is used to take images of oil droplets atomized in the oil-gas mixing gas in the oil-gas mixing pressure stabilizing box; The air outlet of the oil-gas mixture pressure stabilizing box is connected to the air inlet of the oil-gas separator to be tested through a pipeline, and a vortex flowmeter is arranged on the pipeline, which is used to monitor the flow rate of the oil-gas mixture entering the oil-gas separator to be tested; the air outlet of the oil-gas separator to be tested is connected to the air inlet of the absolute filter through a pipeline; the air outlet of the absolute filter is used to discharge pure gas into the air, and the absolute filter is used to filter and collect the unseparated engine oil in the gas discharged through the air outlet of the oil-gas separator to be tested; the high-pressure end interface of the differential pressure gauge The low-pressure end interface is respectively connected to the air inlet and air outlet of the oil-gas separator to be tested, so as to monitor the pressure data of the air inlet and air outlet of the oil-gas separator to be tested and the pressure loss data of the oil-gas mixture after flowing through the oil-gas separator to be tested; the oil return port of the oil-gas separator to be tested is connected to the oil collector through the oil return pipeline, and the oil collector is used to collect the engine oil separated by the oil-gas separator to be tested; the oil return port of the oil-gas mixture pressure stabilizing tank is connected to the oil collector through the same pressure pipeline, so that the air pressure of the oil-gas separator to be tested is the same as that of the oil-gas mixture pressure stabilizing tank; An atomizing nozzle is provided on the oil-gas mixing pressure stabilizing box; the oil outlet of the oil supply system is connected to the inlet of the atomizing nozzle, which is used to provide high-pressure engine oil to the oil-gas mixing pressure stabilizing box; the outlet of the atomizing nozzle is located in the oil-gas mixing pressure stabilizing box, which is used to atomize the engine oil provided by the oil supply system, and the atomized engine oil in the oil-gas mixing pressure stabilizing box is mixed with the compressed air provided by the air supply system to form an oil-gas mixture; the oil return port 2 of the oil-gas mixing pressure stabilizing box is connected to the oil return port of the oil supply system through a pipeline, and an oil return valve is provided on the pipeline; The digital control platform is respectively connected to the flow limiting valve, the high-speed camera, the vortex flowmeter, the differential pressure gauge and the oil return valve for communication.

2. The engine oil-gas separator comprehensive performance test device according to claim 1, characterized in that: The position of the oil return port 1 is higher than the bottom of the oil-gas mixing pressure stabilizing tank and not higher than the air outlet; the oil return port 2 is located at the bottom of the oil-gas mixing pressure stabilizing tank.

3. The engine oil-gas separator comprehensive performance test device according to claim 1, characterized in that: The atomizing nozzle is located in close proximity to the air inlet, either above or below the air inlet.

4. The engine oil-gas separator comprehensive performance test device according to claim 3, characterized in that: When the atomizing nozzle is located above the air inlet, it sprays downwards; when the atomizing nozzle is located below the air inlet, it sprays upwards.

5. The engine oil-gas separator comprehensive performance test device according to claim 1, characterized in that: The air supply system includes a motor speed regulator and a high-pressure fan; the high-pressure fan is connected to the air inlet of the oil-gas mixing pressure stabilizing box through a pipeline, and a flow limiting valve is arranged on the pipeline; the motor speed regulator controls the input voltage of the high-pressure fan and adjusts the flow rate of compressed air generated by the high-pressure fan.

6. The engine oil-gas separator comprehensive performance test device according to claim 1, characterized in that: The oil supply system includes a pressure regulating nozzle, an air pump, a pressure relief valve, an oil pump, a heater, an oil tank, a temperature gauge and a liquid level sensor; The fuel tank is used to store engine oil; the heater is connected to the fuel tank through an electric heating pipe, and is used to heat the engine oil in the fuel tank to simulate engine oil at different temperatures; the temperature gauge and the liquid level sensor are both arranged inside the fuel tank, and are respectively used to monitor the engine oil temperature and the engine oil amount in the fuel tank in real time; the oil outlet of the fuel tank is connected to the oil inlet of the pressure regulating nozzle through a pipeline, and an oil pump and a pressure relief valve are arranged on the pipeline; the pressure relief valve is used to reduce the oil supply pressure of the oil; the air pump is connected to the air inlet of the pressure regulating nozzle, and the air pump is used to pressurize the engine oil in the pressure regulating nozzle; the digital control platform monitors the oil pressure at the pressure regulating nozzle in real time and adjusts it by controlling the air pump; the oil outlet of the pressure regulating nozzle is connected to the inlet of the atomizing nozzle; the oil return port 2 of the oil-gas mixing pressure stabilizing box is connected to the oil return port of the fuel tank through a pipeline, and an oil return valve is arranged on the pipeline; The digital control platform is respectively connected to the pressure regulating nozzle, the air pump, the heater, the temperature gauge and the liquid level sensor for communication.

7. The engine oil-gas separator comprehensive performance test device according to claim 6, characterized in that: The oil outlet of the oil tank is connected to the oil inlet of the pressure regulating nozzle through a pipeline, and an oil pump and a pressure relief valve are arranged on the pipeline in sequence according to the flow direction of the engine oil.

8. The engine oil-gas separator comprehensive performance test device according to claim 6, characterized in that: The liquid level sensor is arranged at the top of the inner wall of the oil tank; the head of the temperature gauge is arranged at the top of the outer wall of the oil tank, and the sensor of the temperature gauge is located in the oil level.

9. The engine oil-gas separator comprehensive performance test device according to claim 6, characterized in that: The vortex flowmeter adopts temperature and pressure compensation type vortex flowmeter.

10. The engine oil-gas separator comprehensive performance test device according to claim 6, characterized in that: The pressure regulating nozzle has oil outlets of different sizes to adjust the diameter of the sprayed oil, thereby adjusting the flow rate of the oil sprayed into the oil-gas mixing pressure stabilizing tank.

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