Performance test bench for electric filter

Abstract

An electric drive filter performance test bench comprises a test medium box and a pollutant medium box, and the pollutant medium box is communicated with the test medium box through a pollutant conveying pipeline. A test pipeline is further communicated with the test medium box, one end of the test pipeline is arranged in the test medium box and communicated with a filter to be tested, the other end of the test pipeline is communicated with the test medium box, and an absolute pressure sensor, a gear pump set, a system filter, a flow meter and an adjusting valve are sequentially installed on the test pipeline. A sampling port is also arranged on the test pipeline at the absolute pressure sensor; a first three-way valve and a second three-way valve are respectively arranged on the test pipeline at two sides of the system filter; the test pipeline between the absolute pressure sensor and the gear pump set is provided with a preparation port, and a preparation pipeline is communicated between the preparation port and the test medium box. According to the invention, the actual working state of the electric filter can be well simulated, so that the performance of the electric filter under the actual working condition can be reflected to the greatest extent.

Description

Technical Field

[0001] This invention relates to the field of physics, and more particularly to performance testing technology for automotive filters, specifically an electric drive filter performance testing bench. Background Technology

[0002] Currently, in the test method for the particle efficiency of filters using HY-15 as the medium, a gear pump and a mass flow meter are used as the delivery pump and measuring device. The pressure at both ends of the specimen is detected by a positive pressure sensor and a differential pressure sensor to obtain the filtration efficiency and dust holding capacity data, so as to determine whether the filter meets the filtration effect required by the product.

[0003] However, in the above test, the entire system was under positive pressure, which does not match the actual working state of the electric drive filter. Therefore, the test results cannot reflect the performance of the electric drive filter under actual working conditions to the greatest extent. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an electric drive filter performance test bench that can effectively simulate the actual working state of an electric drive filter, thereby reflecting the performance of the electric drive filter under actual working conditions to the greatest extent, in order to address the shortcomings of the existing technology.

[0005] The technical problem to be solved by the present invention is achieved through the following technical solution: an electric drive filter performance test bench, including a test medium tank and a contaminant medium tank, wherein the contaminant medium tank is connected to the test medium tank through a contaminant conveying pipe, a peristaltic pump is installed on the contaminant conveying pipe, a test medium stirring device is installed at the bottom of the test medium tank, and a contaminant stirring device is installed at the bottom of the contaminant medium tank. A test pipeline is also connected to the test medium tank. One end of the test pipeline is set inside the test medium tank and connected to the filter to be tested. The other end of the test pipeline is connected to the test medium tank. An absolute pressure sensor, a gear pump set, a system filter, a flow meter and a regulating valve are installed sequentially on the test pipeline. A sampling port is also set on the test pipeline at the absolute pressure sensor. A sampling control valve is installed on the test pipeline at the sampling port. A first three-way valve and a second three-way valve are installed on the test pipelines on both sides of the system filter, respectively. The third valve port of the first three-way valve and the third valve port of the second three-way valve are connected to each other. A backup port is provided on the test pipeline between the absolute pressure sensor and the gear pump set. A backup pipeline is also connected between the backup port and the test medium tank. A backup control valve is installed on the backup pipeline.

[0006] Furthermore, the test medium stirring device includes a stirring motor and stirring blades. The motor shaft of the stirring motor extends into the test medium tank from the outside to the inside. The stirring blades are installed on the motor shaft of the stirring motor inside the test medium tank. A rotary dynamic seal is installed at the junction of the motor shaft of the stirring motor and the test medium tank.

[0007] Furthermore, the pollutant stirring device includes a stirring motor and stirring blades. The motor shaft of the stirring motor extends from the outside to the inside into the pollutant medium tank. The stirring blades are installed on the motor shaft of the stirring motor inside the pollutant medium tank. A rotary dynamic seal is installed at the junction of the motor shaft of the stirring motor and the pollutant medium tank.

[0008] Furthermore, a temperature sensor was also installed on the test pipeline at the absolute pressure sensor location.

[0009] Furthermore, the gear pump in the gear pump assembly is a special conjugate internal spur gear pump, and the motor of the gear pump assembly is a variable frequency motor.

[0010] Furthermore, both the first three-way valve and the second three-way valve are pneumatic three-way ball valves.

[0011] Furthermore, the pre-control valve is a pneumatic ball valve.

[0012] Furthermore, a test medium discharge port is provided at the bottom of the test medium tank, and a test medium discharge valve is installed on the test medium tank at the test medium discharge port. A contaminant discharge port is also provided at the bottom of the contaminant medium tank, and a contaminant discharge valve is installed on the contaminant medium tank at the contaminant discharge port.

[0013] Compared with the prior art, the present invention provides an electric drive filter performance test bench, which can test the particle efficiency and dust holding capacity of automotive electric drive filters under negative pressure when the viscosity of HY-15 medium is 15cst. ​​It effectively solves the problems of pollutant uniformity, flow control and stability of various components during operation when testing particle efficiency and dust holding capacity under negative pressure. It is convenient to simulate the actual working state of electric drive filters and reflects the performance of electric drive filters under actual working conditions to the greatest extent. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the present invention. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0016] Reference Figure 1 An electric filter performance test bench is designed to evaluate the filtration performance of an electric filter under different media conditions. Specifically, it includes a test media tank 18 and a contaminant media tank 13. The contaminant media tank 13 is connected to the test media tank 18 via a contaminant delivery pipe. A peristaltic pump 12 is installed on the contaminant delivery pipe. A test media stirring device 17 is installed at the bottom of the test media tank 18, and a contaminant stirring device 14 is installed at the bottom of the contaminant media tank 13. The test media tank 18 stores and circulates the clean media (such as HY-15) required for the test. The test media stirring device 17 at the bottom ensures uniform mixing of the media, avoiding sedimentation or stratification, and ensuring the accuracy of the test results. The contaminant media tank 13 stores specific contaminants, such as particulate matter, suspended solids, or chemical reagents. The peristaltic pump 12 precisely controls the amount of contaminants delivered to simulate media environments with different levels of contamination. The contaminant stirring device 14 also ensures uniform distribution of contaminants in the media. Preferably, the test medium stirring device 17 includes a stirring motor and stirring blades. The motor shaft of the stirring motor extends from the outside to the inside into the test medium tank 18. The stirring blades are installed on the motor shaft of the stirring motor inside the test medium tank 18. A rotary dynamic seal is installed at the junction of the motor shaft of the stirring motor and the test medium tank 18. The contaminant stirring device 14 includes a stirring motor and stirring blades. The motor shaft of the stirring motor extends from the outside to the inside into the contaminant medium tank 13. The stirring blades are installed on the motor shaft of the stirring motor inside the contaminant medium tank 13. A rotary dynamic seal is installed at the junction of the motor shaft of the stirring motor and the contaminant medium tank 13.

[0017] A test pipeline is also connected to the test medium tank 18. One end of the test pipeline is located inside the test medium tank 18 and connected to the filter to be tested 1. The other end of the test pipeline is connected to the test medium tank 18. The test pipeline is used to connect the filter to be tested 1 (i.e., the electrically driven filter) and the test medium tank 18 to form a closed circulation system. An absolute pressure sensor 4, a gear pump group 6, a system filter 8, a flow meter 10, and a regulating valve 11 are installed sequentially on the test pipeline. A temperature sensor 3 is also installed on the test pipeline at the absolute pressure sensor 4. The absolute pressure sensor 4 and the temperature sensor 3 are used to detect and feedback key parameters such as pressure and temperature in the system in real time, providing data support for performance evaluation. The gear pump group 6 is used as a power source. Preferably, the gear pump of the gear pump group 6 is a special conjugate internal spur gear pump, and the motor of the gear pump group 6 is a variable frequency motor, which can realize precise flow regulation and stable output to meet the flow requirements under different test conditions. The system filter 8 is located after the gear pump group 6. It is used to protect the downstream equipment from the influence of impurities in the medium. It can also be used as a comparison reference to evaluate the filtration effect of the filter under test. The flow meter 10 and the regulating valve 11 are set to facilitate accurate measurement and adjustment of the medium flow rate and ensure the consistency of test conditions. A first three-way valve 7 and a second three-way valve 9 are installed on the test pipes on both sides of the system filter 8. The third valve port of the first three-way valve 7 and the third valve port of the second three-way valve 9 are connected to each other. The first three-way valve 7 and the second three-way valve 9 can be flexibly switched between different parts of the test pipe through the interconnected third valve ports, which is convenient for various test configurations and operations. Preferably, the first three-way valve 7 and the second three-way valve 9 are both pneumatic three-way ball valves. In order to allow sampling at any time during the test to detect the content of contaminants or other key indicators in the medium and provide direct evidence for filter performance evaluation, a sampling port is also set on the test pipeline at the absolute pressure sensor 4, and a sampling control valve 2 is installed on the test pipeline at the sampling port. To provide an additional medium circulation path for the system for preheating, pre-cleaning, or special test preparation stages, ensuring the smooth progress of the test process, a preparatory port is provided on the test pipeline between the absolute pressure sensor 4 and the gear pump group 6. A preparatory pipeline is also connected between the preparatory port and the test medium tank 18. A preparatory control valve 5 is installed on the preparatory pipeline. Preferably, the preparatory control valve 5 is a pneumatic ball valve.

[0018] A test medium discharge port is provided at the bottom of the test medium tank 18, and a test medium discharge valve 16 is installed on the test medium tank 18 at the test medium discharge port. A contaminant discharge port is also provided at the bottom of the contaminant medium tank 13, and a contaminant discharge valve 15 is installed on the contaminant medium tank 13 at the contaminant discharge port. The test medium discharge valve 16 and the contaminant discharge valve 15 are respectively used for the safe discharge of test medium and contaminants after the test, so as to avoid environmental pollution.

[0019] In practical use, this invention employs a special conjugate internal spur gear pump and a gear flow meter. The special conjugate internal spur gear pump operates within a viscosity range of 10–20000 cst and a temperature range of 0–100°C. When the viscosity of the medium reaches 15 cst at low temperatures, the pump automatically adjusts its speed after extracting the current temperature and flow rate to calculate the viscosity, ensuring that the pump can draw in the required flow rate. The gear flow meter has a wide practical viscosity range (10–25000 cst) and a temperature range (0–100°C), which can meet the experimental requirements and obtain data simulating actual working conditions. The flow control adopts a V-type ball valve + pump motor frequency converter. Based on the pre-set data, the flow output characteristics are output through software algorithm to produce a flow characteristic curve. The speed of the pump unit driven by the frequency converter is adjusted according to the curve to achieve the required flow of the system.

[0020] The specific experimental process of this invention is as follows: Before starting, test medium HY-15 needs to be added to the test medium tank 18. Then, turn on the test medium stirring device 17 in the test medium tank 18, open the pneumatic ball valve 5, and use the test medium to enter the special conjugate internal spur gear pump without passing through the test filter 1 to fill the gear pump group 6 with the test medium. Start the variable frequency motor of the gear pump group 6, and adjust the positions of the pneumatic three-way ball valve I7 and pneumatic three-way ball valve II9 to allow the test medium to return to the test medium tank 18 through the system filter 8, flow meter 10, and regulating valve 11. After the temperature of the test medium stabilizes, close the pneumatic ball valve 5, allowing the test medium to enter the gear pump group 6 through the test filter 1. Adjust the positions of the pneumatic three-way ball valve I7 and pneumatic three-way ball valve II9 so that the test medium passes through the system filter 8, flows through the flow meter 10 and the regulating valve 11, and returns to the test medium tank 18. By adjusting the motor frequency converter and regulating valve 11 of gear pump group 6, the flow rate is made to meet the test requirements. At this time, the filter 1 to be tested is in a negative pressure working state. Add concentrate to the contaminant medium tank 13 and turn on the contaminant stirring device 14. After 30 minutes, adjust the speed of the peristaltic pump 12 according to the flow rate requirements so that the flow rate of the concentrate reaches the test requirements. Then, start the peristaltic pump 12 to uniformly add contaminants to the test medium tank 18 and start timing. And within the specified time period, particle counts are performed directly from the test medium tank 18 and the sampling port 2; The test will stop once the increase in the absolute pressure sensor 4 reaches the test requirements. The particle counting efficiency of the electric drive filter is calculated by collecting data from a particle counter. The weight of contaminants added to the test medium tank 18 is calculated by taking the peristaltic pump running time, flow rate, and contaminant concentration. The weight of unfiltered contaminants is calculated by analyzing the contaminant concentration in the oil sample in the test medium tank 18 and the volume of the oil sample in the test medium tank 18. The dust holding capacity of the filter 1 to be tested, i.e. the dust holding capacity of the electric filter, is calculated based on the difference between the two.

[0021] After the test is completed, adjust the positions of pneumatic three-way ball valve I7 and pneumatic three-way ball valve II9 so that the test medium returns to the test medium tank 18 through the flow meter 10 and the regulating valve 11 and circulates to achieve the purpose of cleaning the system medium.

Claims

1. A performance testing bench for an electrically driven filter, characterized in that: It includes a test medium tank and a contaminant medium tank. The contaminant medium tank is connected to the test medium tank through a contaminant delivery pipeline. A peristaltic pump is installed on the contaminant delivery pipeline. A test medium stirring device is installed at the bottom of the test medium tank, and a contaminant stirring device is installed at the bottom of the contaminant medium tank. A test pipeline is also connected to the test medium tank. One end of the test pipeline is set inside the test medium tank and connected to the filter to be tested. The other end of the test pipeline is connected to the test medium tank. An absolute pressure sensor, a gear pump set, a system filter, a flow meter and a regulating valve are installed sequentially on the test pipeline. A sampling port is also set on the test pipeline at the absolute pressure sensor. A sampling control valve is installed on the test pipeline at the sampling port. A first three-way valve and a second three-way valve are installed on the test pipelines on both sides of the system filter, respectively. The third valve port of the first three-way valve and the third valve port of the second three-way valve are connected to each other. A backup port is provided on the test pipeline between the absolute pressure sensor and the gear pump set. A backup pipeline is also connected between the backup port and the test medium tank. A backup control valve is installed on the backup pipeline.

2. The electric filter performance test bench according to claim 1, characterized in that: The test medium stirring device includes a stirring motor and stirring blades. The motor shaft of the stirring motor extends into the test medium tank from the outside to the inside. The stirring blades are installed on the motor shaft of the stirring motor inside the test medium tank. A rotary dynamic seal is installed at the junction of the motor shaft of the stirring motor and the test medium tank.

3. The electric filter performance test bench according to claim 1 or 2, characterized in that: The pollutant mixing device includes a mixing motor and mixing blades. The motor shaft of the mixing motor extends from the outside to the inside into the pollutant medium tank. The mixing blades are installed on the motor shaft of the mixing motor inside the pollutant medium tank. A rotary dynamic seal is installed at the junction of the motor shaft of the mixing motor and the pollutant medium tank.

4. The electric filter performance test bench according to claim 1, characterized in that: A temperature sensor is also installed on the test pipeline at the absolute pressure sensor location.

5. The electric filter performance test bench according to claim 1, characterized in that: The gear pump in the gear pump set is a special conjugate internal spur gear pump, and the motor of the gear pump set is a variable frequency motor.

6. The electric filter performance test bench according to claim 1, characterized in that: Both the first three-way valve and the second three-way valve are pneumatic three-way ball valves.

7. The electric filter performance test bench according to claim 1, characterized in that: The pre-control valve is a pneumatic ball valve.

8. The electric filter performance test bench according to claim 1, characterized in that: A test medium discharge port is also provided at the bottom of the test medium tank, and a test medium discharge valve is installed on the test medium tank at the test medium discharge port. A contaminant discharge port is also provided at the bottom of the contaminant medium tank, and a contaminant discharge valve is installed on the contaminant medium tank at the contaminant discharge port.

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