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 utility model, the actual working state of the electric-driven filter can be well simulated, so that the performance of the electric-driven filter under the actual working condition can be reflected to the greatest extent.

Description

Technical Field

[0001] The utility model relates to the field of physics, in particular to the performance testing technology of automotive filters, and particularly to an electric drive filter performance test bench. Background Art

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

[0003] However, in the above test, the whole system is in a positive pressure state, which does not conform to the actual working state of the electric drive filter, and 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 utility model is to provide an electric drive filter performance test bench which can well simulate the actual working state of the electric drive filter, so as to reflect the performance of the electric drive filter under actual working conditions to the greatest extent in view of the deficiencies of the prior art.

[0005] The technical problem to be solved by the utility model is realized through the following technical scheme: an electric drive filter performance test bench includes a test medium tank and a pollutant medium tank. The pollutant medium tank is communicated with the test medium tank through a pollutant delivery pipeline. A peristaltic pump is installed on the pollutant delivery pipeline. A test medium stirring device is installed at the bottom of the test medium tank, and a pollutant stirring device is installed at the bottom of the pollutant medium tank;

[0006] A test pipeline is also communicated with the test medium tank. One end of the test pipeline is arranged in the test medium tank and communicated with the filter to be tested. The other end of the test pipeline is communicated with the test medium tank. An absolute pressure sensor, a gear pump group, a system filter, a flow meter and a regulating valve are sequentially installed on the test pipeline. A sampling port is also arranged 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 respectively installed on the test pipelines on both sides of the system filter. The third valve ports of the first three-way valve and the second three-way valve are communicated with each other;

[0007] A preparation port is arranged on the test pipeline between the absolute pressure sensor and the gear pump group. A preparation pipeline is also communicated between the preparation port and the test medium tank. A preparation control valve is installed on the preparation pipeline.

[0008] Further, 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 outside to 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.

[0009] Further, the pollutant stirring device includes a stirring motor and stirring blades. The motor shaft of the stirring motor extends into the pollutant medium tank from outside to inside. 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.

[0010] Further, a temperature sensor is also installed on the test pipeline at the absolute pressure sensor.

[0011] Further, the gear pump of the gear pump group is a special conjugate internal straight-tooth gear pump, and the motor of the gear pump group is a variable-frequency motor.

[0012] Further, both the first three-way valve and the second three-way valve are pneumatic three-way ball valves.

[0013] Further, the preliminary control valve is a pneumatic ball valve.

[0014] Further, a test medium discharge port is also provided at the bottom of the test medium tank. A test medium discharge valve is installed on the test medium tank at the test medium discharge port. A pollutant discharge port is also provided at the bottom of the pollutant medium tank. A pollutant discharge valve is installed on the pollutant medium tank at the pollutant discharge port.

[0015] Compared with the prior art, the present utility model provides an electric drive filter performance test bench, which can realize the particle efficiency and dust capacity test of an automotive electric drive filter under negative pressure when the viscosity of the HY-15 medium is 15 cst. It well solves the problems of pollutant uniformity, flow control and the stability of each component during operation when performing particle efficiency and dust capacity tests under negative pressure, is convenient for simulating the actual working state of the electric drive filter, and reflects the performance of the electric drive filter under actual working conditions to the greatest extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0018] Referring to Figure 1 , an electric drive filter performance test bench is designed to evaluate the filtration performance of an electric drive filter under different medium conditions. Specifically, it includes a test medium tank 18 and a pollutant medium tank 13. The pollutant medium tank 13 is connected to the test medium tank 18 through a pollutant delivery pipeline. A peristaltic pump 12 is installed on the pollutant delivery pipeline. A test medium stirring device 17 is installed at the bottom of the test medium tank 18, and a pollutant stirring device 14 is installed at the bottom of the pollutant medium tank 13. The test medium tank 18 is used to store and circulate the clean medium (such as HY-15) required for the test. The test medium stirring device 17 at the bottom ensures uniform mixing of the medium, avoiding precipitation or stratification phenomena, and ensuring the accuracy of the test results. The pollutant medium tank 13 is used to store specific pollutants, such as particulate matter, suspended matter, or chemical reagents, etc. The peristaltic pump 12 precisely controls the delivery volume of the pollutants to simulate a medium environment with different pollution levels. The pollutant stirring device 14 also ensures the uniform distribution of the pollutants in the medium.

[0019] Preferably, the test medium stirring device 17 includes a stirring motor and stirring blades. The motor shaft of the stirring motor extends into the test medium tank 18 from the outside to the inside. 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 connection between the motor shaft of the stirring motor and the test medium tank 18. The pollutant stirring device 14 includes a stirring motor and stirring blades. The motor shaft of the stirring motor extends into the pollutant medium tank 13 from the outside to the inside. The stirring blades are installed on the motor shaft of the stirring motor inside the pollutant medium tank 13. A rotary dynamic seal is installed at the connection between the motor shaft of the stirring motor and the pollutant medium tank 13.

[0020] A test pipeline is also connected to the test medium tank 18. One end of the test pipeline is arranged inside the test medium tank 18 and is 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 electric drive filter) and the test medium tank 18 to form a closed circulation system. An absolute pressure sensor 4, a gear pump set 6, a system filter 8, a flow meter 10 and a regulating valve 11 are successively installed 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 the pressure and temperature in the system in real time, providing data support for performance evaluation. The gear pump set 6 is used as a power source. Preferably, the gear pump of the gear pump set 6 is a special conjugate internal straight-tooth gear pump, and the motor of the gear pump set 6 is a variable-frequency motor, which can achieve precise adjustment and stable output of the flow rate and meet the flow rate requirements under different test conditions.

[0021] The system filter 8 is located behind the gear pump set 6 and is used to protect the subsequent equipment from the influence of impurities in the medium. At the same time, it can also be used as a comparison reference to evaluate the filtering effect of the filter to be tested. The settings of the flow meter 10 and the regulating valve 11 facilitate the precise measurement and adjustment of the medium flow rate to ensure the consistency of the test conditions. A first three-way valve 7 and a second three-way valve 9 are respectively installed on the test pipeline on both sides of the system filter 8. The third valve ports of the first three-way valve 7 and the second three-way valve 9 are interconnected. The first three-way valve 7 and the second three-way valve 9 realize the flexible switching of different parts of the test pipeline through the interconnected third valve ports, facilitating 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.

[0022] In order to allow sampling at any time during the test to detect the pollutant content or other key indicators in the medium and provide direct evidence for the performance evaluation of the filter, a sampling port is also provided on the test pipeline at the absolute pressure sensor 4. A sampling control valve 2 is installed on the test pipeline at the sampling port.

[0023] To provide an additional medium circulation path for the system, which is used for preheating, pre-cleaning or special test preparation stages to ensure the smooth progress of the test process, a preparation port is provided on the test pipeline between the absolute pressure sensor 4 and the gear pump set 6. A preparation pipeline is also connected between the preparation port and the test medium tank 18. A preparation control valve 5 is installed on the preparation pipeline. Preferably, the preparation control valve 5 is a pneumatic ball valve.

[0024] At the bottom of the test medium tank 18, a test medium discharge port is also provided. A test medium discharge valve 16 is installed on the test medium tank 18 at the test medium discharge port. At the bottom of the pollutant medium tank 13, a pollutant discharge port is also provided. A pollutant discharge valve 15 is installed on the pollutant medium tank 13 at the pollutant discharge port. The test medium discharge valve 16 and the pollutant discharge valve 15 are respectively used for the safe discharge of the test medium and pollutants after the test, to avoid environmental pollution.

[0025] In actual use, the present utility model adopts a special conjugate internal spur gear pump and a gear flowmeter. The viscosity range of use of the special conjugate internal spur gear pump is between 10 and 20000 cst, and the temperature range is between 0 and 100 °C. When the low-temperature viscosity of the medium reaches 15 cst, the current temperature and flow are extracted through the cooperation of electrical software to calculate the viscosity, and then the rotation speed is automatically adjusted so that the pump can normally suck the required flow. The viscosity practical range of the gear flowmeter is very wide (between 10 and 25000 cst), and the temperature range is between 0 and 100 °C. Under such conditions, the test requirements can be met, and data simulating the actual working conditions can be obtained;

[0026] The flow control adopts a V-type ball valve + the pump group motor frequency converter. For the flow output characteristics, according to the prefabricated data, the flow characteristic curve is output through software algorithms, and the pump group speed is adjusted by the frequency conversion motor driven according to the curve to reach the required flow of the system.

[0027] The specific test process of the present utility model is as follows:

[0028] Before starting, the test medium HY-15 needs to be filled in the test medium tank 18, and then the test medium stirring device 17 in the test medium tank 18 is started. The pneumatic ball valve 5 is opened, and the test medium is used to enter the special conjugate internal spur gear pump without passing through the filter to be tested 1 to fill the gear pump group 6 with the test medium. The frequency conversion motor of the gear pump group 6 is started, and the pneumatic three-way ball valve I7 and the pneumatic three-way ball valve II9 are adjusted in position so that the test medium passes through the system filter 8, the flowmeter 10, and the regulating valve 11 and returns to the test medium tank 18;

[0029] After the temperature of the test medium is stable, the pneumatic ball valve 5 is closed, and the test medium is made to enter the gear pump group 6 through the filter to be tested 1. The pneumatic three-way ball valve I7 and the pneumatic three-way ball valve II9 are adjusted in position so that the test medium bypasses the system filter 8 and returns to the test medium tank 18 through the flowmeter 10 and the regulating valve 11;

[0030] By adjusting the motor frequency converter of the gear pump group 6 and the regulating valve 11, the flow rate is made to reach the test requirements. At this time, the filter to be tested 1 is in a negative pressure working state;

[0031] Add the concentrate to the pollutant medium tank 13 and turn on the pollutant stirring device 14. After 30 minutes, adjust the rotation speed of the peristaltic pump 12 according to the flow rate requirement to make the flow rate of the concentrate meet the test requirement, and start the peristaltic pump 12 to uniformly add pollutants to the test medium tank 18 and start timing;

[0032] And directly perform particle counting from the test medium tank 18 and the sampling port 2 within the specified time period;

[0033] Stop the test when the increase value of the absolute pressure sensor 4 reaches the test requirement;

[0034] Collect the particle counting efficiency of the electric drive filter through the data counted by the particle counter respectively;

[0035] Calculate the weight of the pollutants added to the test medium tank 18 through the running time, flow rate of the peristaltic pump and the concentration of the pollutants. Calculate the weight of the unfiltered pollutants by analyzing the concentration of the pollutants in the oil sample in the test medium tank 18 and the volume of the oil sample in the test medium tank 18. Calculate the dust holding capacity of the filter to be tested 1, that is, the dust holding capacity of the electric drive filter, based on the difference between the two.

[0036] After the test is completed, adjust the positions of the pneumatic three-way ball valve I 7 and the pneumatic three-way ball valve II 9 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. An electric drive filter performance test bench, characterized in that: It includes a test medium tank and a pollutant medium tank. The pollutant medium tank is connected to the test medium tank through a pollutant delivery pipeline. A peristaltic pump is installed on the pollutant delivery pipeline. A test medium stirring device is installed at the bottom of the test medium tank, and a pollutant stirring device is installed at the bottom of the pollutant medium tank; A test pipeline is also connected to the test medium tank. One end of the test pipeline is arranged inside the test medium tank and is 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 group, a system filter, a flow meter and a regulating valve are successively installed on the test pipeline. A sampling port is also provided 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 respectively installed on the test pipelines on both sides of the system filter. The third valve ports of the first three-way valve and the second three-way valve are interconnected; A preparation port is provided on the test pipeline between the absolute pressure sensor and the gear pump group. A preparation pipeline is also connected between the preparation port and the test medium tank. A preparation control valve is installed on the preparation pipeline.

2. The electric drive filter performance test bench according to claim 1, wherein: 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 outside to 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 connection between the motor shaft of the stirring motor and the test medium tank.

3. The electric drive filter performance test bench according to claim 1 or 2, characterized in that: The pollutant stirring device includes a stirring motor and stirring blades. The motor shaft of the stirring motor extends into the pollutant medium tank from outside to inside. 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 connection between the motor shaft of the stirring motor and the pollutant medium tank.

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

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

6. The performance test bench for the electric drive filter 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 performance test bench for the electric drive filter according to claim 1, wherein: The preparation control valve is a pneumatic ball valve.

8. The electric drive filter performance test bench according to claim 1, wherein: A test medium discharge port is also provided at the bottom of the test medium tank. A test medium discharge valve is installed on the test medium tank at the test medium discharge port. A pollutant discharge port is also provided at the bottom of the pollutant medium tank. A pollutant discharge valve is installed on the pollutant medium tank at the pollutant discharge port.

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