Device and method for testing performance of oil-water separator

Abstract

The invention relates to the technical field of fuel oil filtration, and particularly discloses an oil-water separator performance testing device and method. The device comprises an input system, an output system and a measuring system, the input system comprises an air processing module used for supplying compressed air, a flow adjusting module used for adjusting the flow of the compressed air, an oil mist generating module used for supplying oil mist and a water mist generating module used for supplying water mist, and the air processing module, the oil mist generating module and the water mist generating module are sequentially connected in series. The flow adjusting module is connected to the oil mist generating module and the water mist generating module in parallel. The output system comprises a first sampling bottle for collecting discharged water, a second sampling bottle for collecting discharged oil and an air metering module for detecting the flow of discharged gas; the measuring system is connected in parallel with a product to be measured and comprises an upstream pressure sensor for detecting the pressure of an air inlet and a downstream pressure sensor for detecting the pressure of an air outlet. The device is used for testing the performance of the oil-water separator, so that rapid verification is realized.

Description

Technical Field

[0001] The invention relates to the technical field of fuel filtration, and in particular to an oil-water separator performance testing device and method. Background Art

[0002] When the engine is working, the high-pressure combustible mixture and burned gas in the combustion chamber will leak into the crankcase through the gap between the piston group and the cylinder to a greater or lesser extent, causing blowby. The components of blowby are unburned fuel gas, water vapor and exhaust gas, which will dilute the engine oil, reduce the performance of the engine oil, and accelerate the oxidation and deterioration of the engine oil. If water vapor condenses in the engine oil, it will form sludge and block the oil circuit; if the acidic gas in the exhaust gas mixes into the lubrication system, it will cause corrosion and accelerated wear of engine parts; at the same time, blowby will also cause the crankcase pressure to be too high and damage the crankcase seal, causing the engine oil to leak and lose.

[0003] Therefore, a crankcase ventilation oil-water separator is required on the engine to suck the blow-by gas in the crankcase into the intake manifold so that it can be re-burned in the combustion chamber of the engine. After the gas from the crankcase enters the crankcase ventilation oil-water separator through the air inlet, the rotor intercepts the engine oil, exhaust gas and water vapor in it and condenses them into liquid for separation. The separated gas re-enters the engine intake system through the air outlet, condenses into liquid and flows to the oil accumulation tank at the bottom under the action of gravity. After a short period of sedimentation, the oil and water are separated. The bottom water is separated by the oil-water separation filter material and flows downward and is discharged from the drain port at the bottom of the tank. After the engine oil reaches a certain height on the top of the filter material, it flows to the base through the bearing gap of the bottom channel of the filter element, and finally returns to the engine through the oil return port. After the above process, the crankcase ventilation oil-water separator can effectively prevent the harm caused by blow-by gas in the crankcase to ensure the normal operation of the crankcase. Summary of the invention

[0004] The object of the present invention is to provide an oil-water separator performance testing device and method to complete the performance test of the oil-water separator on a test bench and realize rapid verification of the performance of the oil-water separator.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] The oil-water separator performance test device is used to test the performance of the product to be tested, and the oil-water separator performance test device includes an input system, an output system and a measurement system; the input system includes an air processing module, a flow regulating module, an oil mist generating module and a water mist generating module, the air processing module is used to supply compressed air to the product to be tested, the oil mist generating module is used to supply oil mist to the product to be tested, and the water mist generating module is used to supply water mist to the product to be tested, the air processing module, the oil mist generating module and the water mist generating module are connected in series in sequence, and the flow regulating module is connected in parallel to the oil mist generating module and the water mist generating module. The water mist generating module is used for adjusting the flow rate of the compressed air; the output system comprises a first sampling bottle, a second sampling bottle and an air metering module, the first sampling bottle is used for collecting water discharged from the product to be tested, the second sampling bottle is used for collecting oil discharged from the product to be tested, and the air metering module is used for detecting the gas flow discharged from the product to be tested; the measuring system is connected in parallel with the product to be tested, and comprises an upstream pressure sensor and a downstream pressure sensor, the upstream pressure sensor is used for detecting the pressure at the air inlet of the product to be tested; the downstream pressure sensor is used for detecting the pressure at the air outlet of the product to be tested.

[0007] As an optional technical solution for the oil-water separator performance testing device, an external air supply device is connected upstream of the air treatment module, and the external air supply device is used to supply the compressed air to the air treatment module; the air treatment module includes a first valve, an air filter and an air heater connected in series in sequence, the first valve is used to control the gas flow from the external air supply device, the air filter is used to filter impurities in the compressed air, and the air heater is used to heat the compressed air.

[0008] As an optional technical solution for the oil-water separator performance testing device, the oil mist generating module includes a second valve and an oil mist generator connected in series, the second valve is used to control the gas flow from the air processing module, and the oil mist generator is used to generate the oil mist.

[0009] As an optional technical solution for the oil-water separator performance testing device, the oil mist generating module also includes a pressure regulating valve and a detection pressure sensor. The detection pressure sensor is used to detect the pressure at the oil mist generator, and the pressure regulating valve is used to adjust the pressure at the oil mist generator.

[0010] As an optional technical solution for the oil-water separator performance testing device, the water mist generating module includes a water mist generator and a temperature control device arranged on the water mist generator, the water mist generator is used to generate the water mist, and the temperature control device is used to heat the water mist generator.

[0011] As an optional technical solution for the oil-water separator performance testing device, the flow regulating module includes a third valve and a flow regulating valve, the third valve is used to control the gas flow from the air processing module, and the flow regulating valve is used to control the flow of the compressed air flowing to the product to be tested.

[0012] As an optional technical solution for the oil-water separator performance testing device, the air metering module includes a dehydration device, an absolute filter and a flow meter connected in series in sequence, the dehydration device is used to remove moisture discharged by the product to be tested, the absolute filter is used to separate the oil and water discharged by the product to be tested, and the flow meter is used to measure the flow of the gas separated by the dehydration device and the absolute filter.

[0013] As an optional technical solution for the oil-water separator performance test device, the output end of the flow meter is provided with a discharge port, and the discharge port is used to discharge the gas flowing through the flow meter to the outside.

[0014] As an optional technical solution for the oil-water separator performance testing device, the measurement system also includes a differential pressure sensor, which is arranged between the upstream pressure sensor and the downstream pressure sensor, and is used to calculate the pressure difference between the air inlet and the air outlet of the product to be tested.

[0015] The oil-water separator performance test method is applied to the above-mentioned oil-water separator performance test device, comprising the following steps:

[0016] S1: Check the oil-water separator performance test device to determine whether the oil mist generating module and the water mist generating module can be tested. If yes, proceed to S2; if not, terminate the test and maintain the oil-water separator performance test device;

[0017] S2: Record the weight M of the oil mist generating module 11 , the weight of the water mist generating module M 21 , the weight M of the first sampling bottle 41 and the weight of the second sampling bottle M 51 ;

[0018] S3: Connecting the product to be tested between the input system and the output system, and connecting the measurement system in parallel with the product to be tested;

[0019] S4: Start the input system, wait until the flow rate of the air metering module is stable, record the current flow rate value, the pressure value of the air inlet of the product to be tested, and the pressure value of the air outlet of the product to be tested, start the test and start timing;

[0020] S5: After the test time has passed, the output system is turned off;

[0021] S6: After the oil-water separator performance test device cools down, the measurement system, the input system and the output system are removed from the product to be tested, and the weight M of the oil mist generating module is recorded. 12 , the weight of the water mist generating module M 22 , the weight M of the first sampling bottle 42 and the weight of the second sampling bottle M 52 ;

[0022] S7: Calculate the total refueling volume M 油 , total water addition M 水 , the oil discharge volume M of the product to be tested 油排 , the displacement of the product to be tested M 水排 , where M 油 =M 11 -M 12 , M 水 =M 21 -M 22 , M 油排 =M 52 -M 51 , M 水排 =M 42 -M 41 ;

[0023] S8: Calculate water separation efficiency I 水 Oil separation efficiency I 油 , where I 水 =M 水排 / M 水 , I 油 =M 油排 / M 油 .

[0024] Beneficial effects of the present invention:

[0025] With the help of the arrangement of the input system, the oil-water separator performance test device can supply a mixture of compressed air, water mist and oil mist with known data to the product to be tested, thereby simulating the working scene of the product to be tested and ensuring the consistency and reliability of the test conditions; by setting a flow regulation module, the flow of compressed air can be adjusted, which helps to adjust the composition of the mixture. With the help of the setting of the measurement system, the oil volume, water volume and gas flow discharged by the product to be tested can be reliably counted, thereby providing data support for evaluating the performance of the separator. By comparing the data changes of the input system and the output system before and after the test, it is convenient to calculate the water separation efficiency and oil separation efficiency of the product to be tested, thereby realizing a comprehensive test of the oil-water separator product to be tested. The oil-water separator performance test device is reasonably designed, fully functional and easy to operate. It integrates various functions and technical features, and can accurately and reliably test the oil-water separation performance of the crankcase ventilation oil-water separator on the test bench. It can be used as an effective means of verifying the performance of the oil-water separator to comprehensively evaluate the performance of the oil-water separator, providing important technical support and data guarantee for the research and improvement of the development of crankcase ventilation oil-water separators.

[0026] The oil-water separator performance test method calculates the oil-water separation efficiency of the crankcase ventilation oil-water separator by measuring and weighing the oil mist generating module, the water mist generating module, the first sampling bottle, and the second sampling bottle before and after the test. Combining the above data with the flow statistics at the measurement system and the air metering module, the oil-water separation performance of the product to be tested can be effectively analyzed. The above process is simple and reliable, and can be used as an effective means of verifying the performance of the oil-water separator, which helps to achieve a comprehensive evaluation of the performance of the product to be tested, and can provide technical support and data guarantee for the research and development of crankcase ventilation oil-water separators. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of an oil-water separator performance testing device provided by an embodiment of the present invention;

[0028] Figure 2 It is a flow chart of the oil-water separator performance testing method provided by an embodiment of the present invention.

[0029] In the figure:

[0030] 1. First valve; 2. Air filter; 3. Air heater; 4. Second valve; 5. Pressure regulating valve; 6. Third valve; 7. Flow regulating valve; 8. Detection pressure sensor; 9. Oil mist generator; 10. Temperature control device; 11. Water mist generator; 12. Upstream pressure sensor; 13. Pressure difference sensor; 14. Downstream pressure sensor; 15. Product to be tested; 16. First sampling bottle; 17. Second sampling bottle; 18. Water removal device; 19. Absolute filter; 20. Flow meter. DETAILED DESCRIPTION

[0031] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and the first feature "above", "above" and "above" the second feature include the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature "below", "below" and "below" the second feature include the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0035] like Figure 1As shown, this embodiment provides an oil-water separator performance test device for testing the performance of a product to be tested 15. The oil-water separator performance test device includes an input system, an output system and a measurement system; the input system includes an air processing module, a flow regulating module, an oil mist generating module and a water mist generating module, the air processing module is used to supply compressed air to the product to be tested 15, the oil mist generating module is used to supply oil mist to the product to be tested 15, and the water mist generating module is used to supply water mist to the product to be tested 15, the air processing module, the oil mist generating module and the water mist generating module are connected in series in sequence, and the flow regulating module is connected in parallel to the oil mist generating module and the water mist generating module Module, the flow regulating module is used to regulate the flow of compressed air; the output system includes a first sampling bottle 16, a second sampling bottle 17 and an air metering module, the first sampling bottle 16 is used to collect water discharged from the product to be tested 15, the second sampling bottle 17 is used to collect oil discharged from the product to be tested 15, and the air metering module is used to detect the gas flow discharged from the product to be tested 15; the measuring system is connected in parallel to the product to be tested 15, including an upstream pressure sensor 12 and a downstream pressure sensor 14, the upstream pressure sensor 12 is used to detect the pressure at the air inlet of the product to be tested 15; the downstream pressure sensor 14 is used to detect the pressure at the air outlet of the product to be tested 15.

[0036] With the help of the arrangement of the input system, the oil-water separator performance test device can supply a mixture of compressed air, water mist and oil mist with known data to the product to be tested 15, thereby simulating the working scene of the product to be tested 15 and ensuring the consistency and reliability of the test conditions; by setting a flow regulating module, the flow of compressed air can be adjusted, which helps to adjust the composition of the mixture. With the help of the setting of the measurement system, the amount of oil, water and gas discharged by the product to be tested 15 can be reliably counted, thereby providing data support for evaluating the performance of the separator. By comparing the data changes of the input system and the output system before and after the test, it is convenient to calculate the water separation efficiency and oil separation efficiency of the product to be tested 15, and thus realize the comprehensive test of the product to be tested 15 of the oil-water separator. The oil-water separator performance test device is reasonably designed, fully functional and easy to operate. It integrates various functions and technical features, and can accurately and reliably test the oil-water separation performance of the crankcase ventilation oil-water separator on the test bench. It can be used as an effective means of verifying the performance of the oil-water separator to comprehensively evaluate the performance of the oil-water separator, providing important technical support and data guarantee for the research and improvement of the development of crankcase ventilation oil-water separators.

[0037] In this embodiment, an external air supply device is connected to the upstream of the air processing module, and the external air supply device is used to supply compressed air to the air processing module; the air processing module includes a first valve 1, an air filter 2 and an air heater 3 connected in series, the first valve 1 is used to control the flow of gas from the external air supply device, the air filter 2 is used to filter impurities in the compressed air, and the air heater 3 is used to heat the compressed air. Specifically, the impurities include oil, gas, water, dust, etc.

[0038] The design of introducing external air supply equipment can realize a stable supply of compressed air to the air handling module. The design of the first valve 1 can play the role of opening and closing the air handling module, and can effectively control the flow of compressed air, so that the air handling module can smoothly switch between the open and closed states; the air filter 2 can filter impurities in the compressed air and minimize the impact of test-irrelevant variables on the test results; using the air heater 3 to heat the air can further simulate the working scene of the product to be tested 15, and improve the accuracy and reliability of the test.

[0039] Exemplarily, the oil mist generating module comprises a second valve 4 and an oil mist generator 9 which are connected in series in sequence, the second valve 4 is used to control the gas flow from the air processing module, and the oil mist generator 9 is used to generate oil mist.

[0040] The design of the second valve 4 can play the role of opening and closing the oil mist generating module, and can control whether the compressed gas flows through the oil mist generating module, so that the oil mist generating module can smoothly switch between the open and closed states; the compressed gas flowing through the oil mist generating module can carry the oil mist generated by the oil mist generator 9 to flow to the product to be tested 15, so as to provide the above-mentioned mixture to the product to be tested 15. The oil mist generating module realizes precise control of the oil mist supply through the coordinated use of the second valve 4 and the oil mist generator 9. This design can simulate the actual use scenario and more accurately evaluate the performance of the oil-water separator.

[0041] Furthermore, the oil mist generating module further includes a pressure regulating valve 5 and a detection pressure sensor 8, the detection pressure sensor 8 is used to detect the pressure at the oil mist generator 9, and the pressure regulating valve 5 is used to adjust the pressure at the oil mist generator 9. Specifically, the oil mist is generated by pressurizing the test oil in the oil mist generator 9 and applying a preset pressure to the test oil in the oil mist generator 9.

[0042] The pressure regulating valve 5 can control the pressure of the compressed gas flowing through the oil mist generating module, thereby realizing the flow control of the compressed gas flowing through the oil mist generating module; through the combined application of the pressure regulating valve 5 and the detection pressure sensor 8, the oil mist generating module can adjust and monitor the pressure at the oil mist generator in real time, ensuring the pressure stability during the test and ensuring the smooth generation of oil mist.

[0043] In this embodiment, the water mist generating module includes a water mist generator 11 and a temperature control device 10 disposed on the water mist generator 11. The water mist generator 11 is used to generate water mist, and the temperature control device 10 is used to heat the water mist generator 11. Specifically, the temperature control device 10 is adjusted to heat the deionized water in the water mist generator 11 to a preset temperature to generate water mist.

[0044] Similarly, the oil mist generator 9 also adjusts the pressure entering the oil mist generator 9 through the pressure regulating valve 5 to change the amount of oil mist generated. The greater the pressure entering the oil mist generator 9, the greater the amount of oil mist generated.

[0045] The compressed gas flowing through the water mist generating module can carry the water mist generated by the water mist generator 11 to flow to the product to be tested 15, so as to provide the above-mentioned mixture to the product to be tested 15. The water mist generating module adopts a design in which the water mist generator 11 and the temperature control device 10 are matched, generates water mist by heating deionized water to a preset temperature, and increases the temperature of the water mist by the temperature control device 10, which can further simulate the working scene of the product to be tested 15, enhance the practicality of the test, and improve the accuracy and reliability of the test.

[0046] Exemplarily, the flow regulating module includes a third valve 6 and a flow regulating valve 7 , wherein the third valve 6 is used to control the gas flow from the air processing module, and the flow regulating valve 7 is used to control the flow of compressed air flowing to the product 15 to be tested.

[0047] The design of the third valve 6 can play the role of opening and closing the flow regulating module, and can control whether the compressed gas flows through the flow regulating module, so that the flow regulating module can smoothly switch between the open and closed states; the flow regulating valve 7 can control the pressure of the compressed gas flowing through the flow regulating module, and realize the flow control of the compressed gas flowing through the flow regulating module. By setting the third valve 6 and the flow regulating valve 7, it is possible to achieve precise control of the compressed air flow to the product to be tested 15, so as to ensure the long-term stable operation of the flow regulating module and ensure that the test process meets the standard requirements.

[0048] By adjusting the flow regulating valve 7, the oil mist is mixed with the water mist and the compressed air and then flows toward the product to be tested 15.

[0049] In this embodiment, the air metering module includes a dehydration device 18, an absolute filter 19 and a flow meter 20 connected in series in sequence. The dehydration device 18 is used to remove moisture discharged from the product to be tested 15, the absolute filter 19 is used to separate oil and water discharged from the product to be tested 15, and the flow meter 20 is used to measure the flow of the gas separated by the dehydration device 18 and the absolute filter 19.

[0050] By designing the water removal device 18, the absolute filter 19 and the flow meter 20 in series, the gas flow discharged by the product to be tested 15 can be accurately measured, and moisture can be removed and oil and water can be separated at the same time, ensuring the accuracy and reliability of the measurement data.

[0051] Furthermore, the output end of the flow meter 20 is provided with a discharge port, and the discharge port is used to discharge the gas flowing through the flow meter 20 to the outside.

[0052] By providing a discharge port, the gas flowing through the flow meter 20 can be discharged to the outside, so as to ensure the continuity and safety of the test process and guarantee the long-term stable operation of the air metering module.

[0053] In this embodiment, the measurement system further includes a differential pressure sensor 13, which is disposed between the upstream pressure sensor 12 and the downstream pressure sensor 14. The differential pressure sensor 13 is used to calculate the pressure difference between the air inlet and the air outlet of the product to be tested 15.

[0054] Calculating the pressure difference between the air inlet and the air outlet of the product to be tested 15 using the pressure difference sensor 13 can provide more detailed data support for analyzing the performance of the separator, and help improve the monitoring effect of the test process of the product to be tested 15.

[0055] Specifically, the temperature of the air heater 3 is controlled to ±2°C; the temperature of the temperature control device 10 is controlled to ±2°C; the metering accuracy of the flow meter 20 is ±2%; the detection accuracy of the upstream pressure sensor 12 is ±2%; the detection accuracy of the differential pressure sensor 13 is ±2%; and the detection accuracy of the downstream pressure sensor 14 is ±2%.

[0056] like Figure 1 and Figure 2 As shown, this embodiment also provides an oil-water separator performance test method, which is applied to the above-mentioned oil-water separator performance test device, and includes the following steps:

[0057] Step 1: Check the oil-water separator performance test device to determine whether the oil mist generating module and the water mist generating module can be tested. If yes, proceed to step 2. If not, terminate the test and maintain the oil-water separator performance test device.

[0058] Step 2: Record the weight M of the oil mist generating module 11 , the weight of the water mist generating module M 21 , the weight M of the first sampling bottle 16 41 and the weight M of the second sampling bottle 17 51 .

[0059] Step 3: Connect the product to be tested 15 between the input system and the output system, and connect the measurement system to the product to be tested 15 in parallel.

[0060] Step 4: Start the input system, and after the flow of the air metering module is stable, record the current flow value, the pressure value of the air inlet of the product to be tested 15, and the pressure value of the air outlet of the product to be tested 15, start the test and start timing.

[0061] Step 5: After the test time, turn off the output system.

[0062] Step 6: After the oil-water separator performance test device cools down, remove the measurement system, input system and output system from the product to be tested 15, and record the weight M of the oil mist generating module. 12 , the weight of the water mist generating module M 22 , the weight M of the first sampling bottle 16 42 and the weight M of the second sampling bottle 17 52 .

[0063] Step 7: Calculate the total refueling volume M 油 , total water addition M 水 , the oil discharge volume M of the product 15 to be tested 油排 , the displacement of the product to be tested is 15M 水排 , where M 油 =M 11 -M 12 , M 水 =M 21 -M 22 , M 油排 =M 52 -M 51 , M 水排 =M 42 -M 41 .

[0064] Step 8: Calculate the water separation efficiency I 水 Oil separation efficiency I 油 , where I 水 =M 水排 / M 水 , I 油 =M 油排 / M 油 .

[0065] The oil-water separator performance test method calculates the oil-water separation efficiency of the crankcase ventilation oil-water separator by measuring and weighing the oil mist generating module, the water mist generating module, the first sampling bottle 16, and the second sampling bottle 17 before and after the test. Combining the above data and the flow statistics at the measurement system and the air metering module, the oil-water separation performance of the product to be tested 15 can be effectively analyzed. The above process is simple and reliable, and can be used as an effective means of verifying the performance of the oil-water separator, which helps to achieve a comprehensive evaluation of the performance of the product to be tested 15, and can provide technical support and data guarantee for the research and development of crankcase ventilation oil-water separators.

[0066] Step 1 includes the following detailed steps: turn on the power of the oil-water separator performance test device, check whether the test oil in the oil mist generator 9 and the deionized water in the water mist generator 11 can be tested, if so, continue with step 2, if not, terminate the test and maintain the oil-water separator performance test device.

[0067] Step three includes the following detailed steps: sequentially connect the oil mist generator 9, the water mist generator 11, the water removal device 18, the absolute filter 19, the upstream pressure sensor 12, the differential pressure sensor 13 and the upstream pressure sensor 14 to the test system; then install the product to be tested 15, and connect the first sampling bottle 16 to the drain outlet of the product to be tested 15, and connect the second sampling bottle 17 to the oil drain outlet of the product to be tested 15.

[0068] The starting input system in step 4 includes the following detailed steps: setting the temperature control device 10 to heat to a preset temperature, starting the water mist generator 11 to heat; opening the first valve 1, allowing the compressed air to be filtered through the air filter 2, setting the heating temperature of the air heater 3, and heating the compressed air; after the temperature of the air heater 3 is stable and the water mist generator 11 starts to generate water mist, opening the second valve 4, adjusting the pressure regulating valve 5 so that the pressure sensor 8 reaches the preset pressure, the compressed air enters the oil mist generator 9 and generates oil mist, and the oil mist and water mist are mixed in the pipeline; opening the third valve 6, the compressed air passes through the flow regulating valve 7 to mix the water mist and oil mist and enter the product to be tested 15. Among them, by adjusting the flow regulating valve 7, the flow size of the test loop can be controlled.

[0069] During the test, it is necessary to observe the liquid levels of the first sampling bottle 16 and the second sampling bottle 17 to avoid overflow.

[0070] In this embodiment, the specific test time is determined by technicians in this field according to engineering practice. The determination method is conventional technical means in this field and is well known to technicians in this field, so it will not be elaborated here.

[0071] The closing of the output system in step 5 includes the following detailed steps: closing the second valve 4, the third valve 6 and the first valve 1 in sequence to cut off the compressed air. Turning off the air heater 3 and the temperature control device 10 to stop heating.

[0072] For example, during the weighing process, the operator needs to handle the first sampling bottle 16 and the second sampling bottle 17 with care to avoid spilling of oil and water drops, thereby helping to improve the accuracy of the test results.

[0073] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An oil-water separator performance testing device, used to test the performance of a product to be tested (15), characterized in that: The oil-water separator performance testing device comprises: An input system comprises an air processing module, a flow regulating module, an oil mist generating module and a water mist generating module, wherein the air processing module is used to supply compressed air to the product to be tested (15), the oil mist generating module is used to supply oil mist to the product to be tested (15), and the water mist generating module is used to supply water mist to the product to be tested (15), the air processing module, the oil mist generating module and the water mist generating module are connected in series in sequence, the flow regulating module is connected in parallel to the oil mist generating module and the water mist generating module, and the flow regulating module is used to regulate the flow of the compressed air; The output system comprises a first sampling bottle (16), a second sampling bottle (17) and an air metering module, wherein the first sampling bottle (16) is used to collect water discharged from the product to be tested (15), the second sampling bottle (17) is used to collect oil discharged from the product to be tested (15), and the air metering module is used to detect the gas flow discharged from the product to be tested (15); A measuring system, connected in parallel to the product to be tested (15), comprises an upstream pressure sensor (12) and a downstream pressure sensor (14), wherein the upstream pressure sensor (12) is used to detect the pressure at the air inlet of the product to be tested (15); and the downstream pressure sensor (14) is used to detect the pressure at the air outlet of the product to be tested (15).

2. The oil-water separator performance testing device according to claim 1, characterized in that: An external air supply device is connected upstream of the air treatment module, and the external air supply device is used to supply the compressed air to the air treatment module; the air treatment module comprises a first valve (1), an air filter (2) and an air heater (3) which are connected in series in sequence, the first valve (1) is used to control the flow of gas from the external air supply device, the air filter (2) is used to filter impurities in the compressed air, and the air heater (3) is used to heat the compressed air.

3. The oil-water separator performance testing device according to claim 1, characterized in that: The oil mist generating module comprises a second valve (4) and an oil mist generator (9) which are connected in series in sequence, wherein the second valve (4) is used to control the flow of gas from the air processing module, and the oil mist generator (9) is used to generate the oil mist.

4. The oil-water separator performance testing device according to claim 3, characterized in that: The oil mist generating module further comprises a pressure regulating valve (5) and a detection pressure sensor (8), wherein the detection pressure sensor (8) is used to detect the pressure at the oil mist generator (9), and the pressure regulating valve (5) is used to adjust the pressure at the oil mist generator (9).

5. The oil-water separator performance testing device according to claim 1, characterized in that: The water mist generating module comprises a water mist generator (11) and a temperature control device (10) arranged on the water mist generator (11); the water mist generator (11) is used to generate the water mist, and the temperature control device (10) is used to heat the water mist generator (11).

6. The oil-water separator performance testing device according to claim 1, characterized in that: The flow regulating module comprises a third valve (6) and a flow regulating valve (7), wherein the third valve (6) is used to control the flow of gas from the air processing module, and the flow regulating valve (7) is used to control the flow of the compressed air flowing to the product to be tested (15).

7. The oil-water separator performance testing device according to claim 1, characterized in that: The air metering module comprises a dewatering device (18), an absolute filter (19) and a flow meter (20) which are connected in series in sequence, wherein the dewatering device (18) is used to remove moisture discharged from the product to be tested (15), the absolute filter (19) is used to separate oil and water discharged from the product to be tested (15), and the flow meter (20) is used to measure the flow of gas separated by the dewatering device (18) and the absolute filter (19).

8. The oil-water separator performance testing device according to claim 7, characterized in that: The output end of the flow meter (20) is provided with a discharge port, and the discharge port is used to discharge the gas flowing through the flow meter (20) to the outside.

9. The oil-water separator performance testing device according to any one of claims 1 to 8, characterized in that: The measurement system further comprises a differential pressure sensor (13), wherein the differential pressure sensor (13) is arranged between the upstream pressure sensor (12) and the downstream pressure sensor (14), and the differential pressure sensor (13) is used to calculate the pressure difference between the air inlet of the product to be measured (15) and the air outlet of the product to be measured (15).

10. A method for testing the performance of an oil-water separator, applied to the oil-water separator performance testing device according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1: Check the oil-water separator performance test device to determine whether the oil mist generating module and the water mist generating module can be tested. If yes, proceed to S2; if not, terminate the test and maintain the oil-water separator performance test device; S2: Record the weight M of the oil mist generating module 11 , the weight of the water mist generating module M 21 , the weight M of the first sampling bottle (16) 41 and the weight M of the second sampling bottle (17) 51 ; S3: connecting the product to be tested (15) between the input system and the output system, and connecting the measurement system in parallel with the product to be tested (15); S4: starting the input system, and after the flow rate of the air metering module is stabilized, recording the current flow rate value, the pressure value of the air inlet of the product to be tested (15), and the pressure value of the air outlet of the product to be tested (15), starting the test and timing; S5: After the test time has passed, the output system is turned off; S6: After the oil-water separator performance test device cools down, the measurement system, the input system and the output system are removed from the product to be tested (15), and the weight M of the oil mist generating module is recorded. 12 , the weight of the water mist generating module M 22 , the weight M of the first sampling bottle (16) 42 and the weight M of the second sampling bottle (17) 52 ; S7: Calculate the total refueling volume M 油 , total water addition M 水 , the oil discharge volume M of the product to be tested (15) 油排 , the displacement M of the product to be tested (15) 水排 , where M 油 =M 11 -M 12 , M 水 =M 21 -M 22 , M 油排 =M 52 -M 51 , M 水排 =M 42 -M 41 ; S8: Calculate water separation efficiency I 水 Oil separation efficiency I 油 , where I 水 =M 水排 / M 水 , I 油 =M 油排 / M 油 .

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