Test device for filter flow pulses

Abstract

The utility model discloses a kind of testing devices for filter flow pulse, it is related to filter detection technical field;Test device includes oil tank, pump group, oil inlet pipeline, oil return pipeline, measured filter and solenoid valve;The oil inlet of pump group is communicated with the oil tank by the oil inlet pipeline, and the oil return of pump group is communicated with the oil tank by the oil return pipeline;The oil inlet pipeline and / or the oil return pipeline include two parallelly arranged pipelines, and the measured filter is arranged on one pipeline in two parallelly arranged pipelines;Two parallelly arranged pipelines are respectively provided with solenoid valve for controlling fluid on-off, and the on-off of two parallelly arranged pipelines alternately can make the flow through the measured filter form flow pulse.The utility model can realize filter flow pulse test, and can be according to customer demand, test under different medium, different flow, specified frequency.

Description

Technical Field

[0001] This utility model relates to the field of filter testing technology, and in particular to a testing device for filter flow pulses. Background Technology

[0002] Currently, traditional pulse testing for filters focuses on pressure pulses, while transmission filters require flow pulse testing due to their specific operating conditions. During transmission operation, fluid flow fluctuates frequently with gear shifts, torque converter lock-up, and other operations. Traditional pressure pulse testing only simulates static or unidirectional pressure changes. Flow pulse testing, on the other hand, can reproduce bidirectional fluid flow and instantaneous flow surges, providing a more realistic representation of operating conditions and a more comprehensive coverage of failure modes. Flow pulse testing is a non-standard test, primarily originating from customer requirements, and currently, there are few test benches available for this purpose. Therefore, those skilled in the art urgently need a testing device for filter flow pulses. Utility Model Content

[0003] The purpose of this invention is to provide a test device for filter flow pulses, so as to solve the problems existing in the prior art. It can realize filter flow pulse testing and can perform tests under different media, different flow rates, and specified frequencies according to customer needs.

[0004] To achieve the above objectives, this utility model provides the following solution: This utility model provides a testing device for filter flow pulses, including an oil tank, a pump set, an oil inlet pipe, an oil return pipe, a filter under test, and a solenoid valve; the oil inlet of the pump set is connected to the oil tank through the oil inlet pipe, and the oil return port of the pump set is connected to the oil tank through the oil return pipe; the oil inlet pipe and / or the oil return pipe includes two parallel pipes, and the filter under test is installed on one of the two parallel pipes; each of the two parallel pipes is equipped with a solenoid valve for controlling the flow on and off, and the alternating opening and closing of the two parallel pipes can cause the flow rate through the filter under test to form a flow pulse.

[0005] In some embodiments, the oil inlet pipeline includes a first oil inlet pipe and a second oil inlet pipe connected in parallel, the oil return pipeline includes a first oil return pipe and a second oil return pipe connected in parallel, and the filter under test includes a filter press and a suction filter; the first oil inlet pipe is equipped with the suction filter and a first solenoid valve, the second oil inlet pipe is equipped with a second solenoid valve, the first oil return pipe is equipped with the filter press and a third solenoid valve, and the second oil return pipe is equipped with a fourth solenoid valve; when the suction filter is under test, the third solenoid valve is de-energized, the fourth solenoid valve is energized, and the alternating on / off energization of the first and second solenoid valves can form a flow pulse in the flow rate passing through the suction filter; when the filter press is under test, the first solenoid valve is de-energized, the second solenoid valve is energized, and the alternating on / off energization of the third and fourth solenoid valves can form a flow pulse in the flow rate passing through the filter press.

[0006] In some embodiments, a flow regulating valve is also included; one end of the first return oil pipe and the second return oil pipe are connected, and the other end of the first return oil pipe and the second return oil pipe are respectively connected to the oil tank; the flow regulating valve is provided on the pipeline between the connection of the first return oil pipe and the second return oil pipe and the return oil port of the pump unit.

[0007] In some embodiments, the system further includes a first flow sensor, a second flow sensor, and a data logger; the first flow sensor is provided on the first oil inlet pipe, the second flow sensor is provided on the first oil return pipe, and both the first flow sensor and the second flow sensor can be connected to the data logger.

[0008] In some embodiments, a first differential pressure sensor and a second differential pressure sensor are also included; one pressure-sensing end of the first differential pressure sensor is connected to the pipeline between the filter press and the first flow sensor, and the other pressure-sensing end is connected to the atmosphere; one sensing end of the second differential pressure sensor is connected to the pipeline between the filter press and the second flow sensor, and the other pressure-sensing end is connected to the pipeline between the filter press and the oil tank.

[0009] In some embodiments, a temperature sensor is also included, the sensing end of which extends into the oil tank to detect the temperature of the oil.

[0010] In some embodiments, at least two of the suction filters are connected in series on the first oil inlet pipe.

[0011] In some embodiments, at least two of the filter presses are connected in series on the first return oil pipe.

[0012] In some embodiments, a controller is also included; the first solenoid valve, the second solenoid valve, the third solenoid valve, and the fourth solenoid valve are all connected to the controller, and the controller is used to control the on and off times of the first solenoid valve, the second solenoid valve, the third solenoid valve, and the fourth solenoid valve.

[0013] In some embodiments, the suction filter is located inside the oil tank and connected to one end of the first oil inlet pipe that extends into the oil tank.

[0014] The present invention achieves the following technical advantages over the prior art: This utility model relates to a test device for flow pulses in filters. It comprises a pipeline, an oil tank, and a pump. The oil tank contains a fluid medium. Two parallel pipelines are installed before and / or after the pump, each equipped with a solenoid valve to control fluid flow. The pump is always running, and when switched to the product pipeline, it can quickly reach the set flow rate. By controlling the alternating on / off states of the two parallel pipelines via the solenoid valves, flow pulse testing of the filter under test can be achieved. Furthermore, the fluid medium in the oil tank can be replaced, the flow rate can be adjusted by controlling the pump assembly, and the frequency of the flow pulses can be adjusted by controlling the on / off time of the solenoid valves. Therefore, tests can be performed on different media, at different flow rates, and at specified frequencies according to customer needs. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of a test device for filter flow pulse in some embodiments of this utility model; In the diagram: 1-First solenoid valve; 2-Second solenoid valve; 3-Pump unit; 4-Flow regulating valve; 5-First flow sensor; 6-Filter press; 7-First differential pressure sensor; 8-Second differential pressure sensor; 9-Suction filter; 10-Third solenoid valve; 11-Fourth solenoid valve; 12-Second flow sensor; 13-Data logger; 14-Oil tank; 15-Temperature sensor; 16-First oil inlet pipe; 17-Second oil inlet pipe; 18-First oil return pipe; 19-Second oil return pipe. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] The purpose of this invention is to provide a test device for filter flow pulses to solve the problems existing in the prior art. It can realize filter flow pulse testing and can perform tests under different media, different flow rates, and specified frequencies according to customer needs.

[0019] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] This utility model provides a device for testing the flow pulse of a filter, such as... Figure 1 As shown, the system includes an oil tank 14, a pump unit 3, an inlet oil line, a return oil line, a filter under test, and a solenoid valve. The inlet of the pump unit 3 is connected to the oil tank 14 via the inlet oil line, and the return oil port of the pump unit 3 is connected to the oil tank 14 via the return oil line. The inlet oil line and / or the return oil line includes two parallel lines, and the filter under test is installed on one of the two parallel lines. Solenoid valves for controlling the flow on and off are respectively installed on the two parallel lines, and the alternating opening and closing of the two parallel lines can make the flow rate through the filter under test form a flow pulse.

[0021] It should be noted that this utility model may have an oil inlet pipeline comprising two parallel pipelines, with the filter under test installed on one of the pipelines; or an oil return pipeline comprising two parallel pipelines, with the filter under test installed on one of the pipelines; or both the oil inlet and oil return pipelines comprising two parallel pipelines, with the corresponding filter under test installed on one of the two pipelines of the oil inlet pipeline and the corresponding filter under test installed on one of the two pipelines of the oil return pipeline; furthermore, the oil tank 14 of this utility model contains a fluid medium, which can be replaced with different fluid media, the flow rate can be controlled by the pump set 3, the opening and closing time of each solenoid valve can be set, and flow pulse testing can be performed at a specified test frequency.

[0022] In some embodiments, the oil inlet pipeline includes a first oil inlet pipe 16 and a second oil inlet pipe 17 arranged in parallel, the oil return pipeline includes a first oil return pipe 18 and a second oil return pipe 19 arranged in parallel, and the filter under test includes a filter press 6 and a suction filter 9; wherein, the first oil inlet pipe 16 is provided with a suction filter 9 and a first solenoid valve 1, the second oil inlet pipe 17 is provided with a second solenoid valve 2, the first oil return pipe 18 is provided with a filter press 6 and a third solenoid valve 10, and the second oil return pipe 19 is provided with a fourth solenoid valve 11.

[0023] When the suction filter 9 is in the test state, the third solenoid valve 10 is de-energized and the fourth solenoid valve 11 is energized. The alternating energization of the first solenoid valve 1 and the second solenoid valve 2 creates flow pulses in the suction filter 9. When the filter press 6 is in the test state, the first solenoid valve 1 is de-energized and the second solenoid valve 2 is energized. The alternating energization of the third solenoid valve 10 and the fourth solenoid valve 11 creates flow pulses in the filter press 6.

[0024] It should be noted that this utility model has two pipelines installed before and after the pump, and each pipeline is equipped with a solenoid valve to control the flow on and off. Furthermore, this utility model can test the flow pulse of the gearbox filter at different temperatures, including two test components: a suction filter 9 and a pressure filter 6. The suction filter 9 is installed at the oil inlet before the pump, and the pressure filter 6 is installed at the oil outlet after the pump. The pump set 3 is always in operation, and when switching to the product pipeline, it can reach the rated flow as quickly as possible. In addition, when the solenoid valve is energized, the corresponding pipeline is in a conductive state, and when the solenoid valve is de-energized, the corresponding pipeline is in a closed state.

[0025] In some embodiments, a flow regulating valve 4 is also included; one end of the first return oil pipe 18 and the second return oil pipe 19 are connected, and the other ends of the first return oil pipe 18 and the second return oil pipe 19 are respectively connected to the oil tank 14; a flow regulating valve 4 is provided on the pipeline between the connection of the first return oil pipe 18 and the second return oil pipe 19 and the return oil port of the pump group 3. The flow regulating valve 4 of this utility model is used to regulate the flow rate through the filter.

[0026] In some embodiments, the system also includes a first flow sensor 5, a second flow sensor 12, and a data logger 13; the first flow sensor 5 is provided on the first oil inlet pipe 16, and the second flow sensor 12 is provided on the first oil return pipe 18, and both the first flow sensor 5 and the second flow sensor 12 can be connected to the data logger 13.

[0027] This invention features a flow meter installed in the pipeline connecting the suction filter before the pump to monitor the flow rate through the suction filter 9 in real time, and a flow meter installed in the pipeline connecting the filter press after the pump to monitor the flow rate through the filter press 6 in real time. The flow sensor is connected to a data logger 13, which can record the flow resistance curve and the raw data per second in real time, ensuring the accuracy of the test and the traceability of the data.

[0028] In some embodiments, a first differential pressure sensor 7 and a second differential pressure sensor 8 are also included; one pressure-sensing end of the first differential pressure sensor 7 is connected to the pipeline between the filter press 9 and the first flow sensor 5, and the other pressure-sensing end is connected to the atmosphere; one sensing end of the second differential pressure sensor 8 is connected to the pipeline between the filter press 6 and the second flow sensor 12, and the other pressure-sensing end is connected to the pipeline between the filter press 6 and the oil tank 14.

[0029] In some embodiments, the suction filter 9 is located inside the oil tank 14 and connected to one end of the first oil inlet pipe 16 that extends into the oil tank 14.

[0030] In some embodiments, a temperature sensor 15 is also included, the detection end of which extends into the oil tank 14 to detect the temperature of the oil.

[0031] In some embodiments, at least two suction filters 9 are connected in series on the first oil inlet pipe 16; and / or at least two pressure filters 6 are connected in series on the first oil return pipe 18.

[0032] By using a product series connection method, this device can perform flow pulse tests on multiple products at once, that is, it can perform flow pulse tests on multiple filters each time.

[0033] In some embodiments, a controller is also included; the first solenoid valve 1, the second solenoid valve 2, the third solenoid valve 10 and the fourth solenoid valve 11 are all connected to the controller, and the controller is used to control the on and off time of the first solenoid valve 1, the second solenoid valve 2, the third solenoid valve 10 and the fourth solenoid valve 11.

[0034] This invention controls the flow of fluid in each pipeline by controlling the engagement of each solenoid valve through control software.

[0035] This utility model relates to a test device for filter flow pulses. Transmission oil is filled into the oil tank 14 and heated by a temperature control device. A suction filter 9 is installed in one pipeline at the oil inlet, and a pressure filter 6 is installed in one pipeline at the oil return outlet. During the test, the solenoid valves alternately open and close, allowing the test medium to flow through (the suction filter 9 or an empty pipeline), the oil inlet pipe, through the first flow sensor 5, the pump unit 3, the flow regulating valve 4 (or the empty pipeline or the pressure filter 6), the second flow sensor 12, and back to the oil tank 14 via the return pipeline. The flow regulating valve 4 adjusts the flow rate through the filter. The test piece is connected to a differential pressure sensor. After the flow rate adjustment is complete, the test medium alternately passes through the suction filter 9 (or the pressure filter 6) or the empty pipeline according to the alternating opening and closing times of the solenoid valves. The flow rate through the filter oscillates between the rated flow rate and zero, forming flow pulses.

[0036] The method for testing filter flow pulses using the testing device of this utility model includes the following steps: Install the filter to be tested and heat the oil in the oil tank 14 to the preset temperature; Adjust the flow rate of pump unit 3 to reach the preset flow rate value, and set the alternation time and number of flow pulses; The solenoid valves on two parallel pipelines are controlled to alternately turn on and off according to a set time. When the pipeline containing the filter under test is in a conducting state and the other pipeline is in a disconnected state, the fluid flows through the filter under test at a set flow rate; when the pipeline containing the filter under test is in a disconnected state and the other pipeline is in a conducting state, the fluid flows back to the oil tank 14 through the other pipeline and the flow rate through the filter under test is zero.

[0037] The test method also includes: installing a suction filter 9, controlling the third solenoid valve 10 to be de-energized, controlling the fourth solenoid valve 11 to be energized, and controlling the first solenoid valve 1 and the second solenoid valve 2 to alternately turn on and off to perform a flow pulse test on the suction filter 9, and recording the flow value and flow curve in real time through a data logger 13; installing a filter press 6, controlling the first solenoid valve 1 to be de-energized, controlling the second solenoid valve 2 to be energized, and controlling the third solenoid valve 10 and the fourth solenoid valve 11 to alternately turn on and off to perform a flow pulse test on the filter press 6, and recording the flow value and flow curve in real time through a data logger 13.

[0038] The filter under test in this utility model includes two types: a pre-pump suction filter 9 and a post-pump pressure filter 6. The two types have certain differences in their settings and the settings of the corresponding first flow sensor 5 and second flow sensor 12. When the filter under test is the suction filter 9, the suction filter 9 is set at the oil inlet port of the inlet and return oil pipes. At this time, the first flow sensor 5 is connected to the oil inlet pipe of the suction filter 9. When the filter under test is the pressure filter 6, the second flow sensor 12 is set on the return oil pipe where the pressure filter 6 is located.

[0039] The main steps involved in testing the suction filter 9 are as follows: S11: Install the suction filter 9 and heat the oil tank to the specified temperature according to the required temperature value; S12: After temperature control is completed, open the first solenoid valve 1 and the fourth solenoid valve 11, open the pump group 3 and adjust the flow regulating valve 4 to make the flow reach the customer's required flow value. Set the positive pressure flow pulse alternation time and number of times. The first solenoid valve 1 and the second solenoid valve 2 are alternately energized according to the set time. The fourth solenoid valve 11 is always energized, the second return oil pipe 19 is in the flow state, the third solenoid valve 10 is always de-energized, and the first return oil pipe 18 is in the closed state. When the first solenoid valve 1 is energized and the second solenoid valve 2 is de-energized, the test medium flows through the positive pressure gearbox filter, and the flow rate through the product is the set flow rate. When the second solenoid valve 2 is energized and the first solenoid valve 1 is de-energized, the test medium flows directly through the second solenoid valve 2 and the fourth solenoid valve 11 back to the oil tank 14, and the product flow rate is 0, realizing the negative pressure gearbox filter flow pulse.

[0040] S13: Data logger 13 can record flow rate values ​​and flow rate curves in real time. During the test, observe whether the flow rate and temperature values ​​meet the requirements. After the test is completed, perform sample performance testing.

[0041] The main steps of performing a filter press 6 test are as follows: S21: Install filter press 6, and heat oil tank 14 to the specified temperature according to the required temperature value; S22: After temperature control is completed, open the second solenoid valve 2 and the third solenoid valve 10, open the pump group 3 and adjust the flow regulating valve 4 to make the flow reach the customer's required flow value. Set the positive pressure flow pulse alternation time and number of times. The third solenoid valve 10 and the fourth solenoid valve 11 are alternately energized according to the set time. The second solenoid valve 2 is always energized, and the second oil inlet pipe 17 is in a flowing state. The first solenoid valve 1 is always de-energized, and the first oil inlet pipe 16 is in a closed state. When the third solenoid valve 10 is energized and the fourth solenoid valve 11 is de-energized, the test medium flows through the positive pressure gearbox filter, and the flow rate through the product is the set flow rate. When the fourth solenoid valve 11 is energized and the third solenoid valve 10 is de-energized, the test medium flows directly through the fourth solenoid valve 11 and flows back to the oil tank 14. The product flow rate is 0, realizing the negative pressure gearbox filter flow pulse.

[0042] S23: The data logger 13 can record the flow rate value and flow rate curve in real time. During the test, observe whether the flow rate value and temperature value meet the requirements. After the test is completed, perform the sample performance test.

[0043] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A testing device for filter flow pulses, characterized in that, This includes the oil tank, pump set, oil inlet line, oil return line, the filter under test, and solenoid valve; The oil inlet of the pump unit is connected to the oil tank through the oil inlet pipeline, and the oil return port of the pump unit is connected to the oil tank through the oil return pipeline; The oil inlet pipeline and / or the oil return pipeline includes two pipelines connected in parallel, and the filter under test is installed on one of the two pipelines connected in parallel. Two parallel pipelines are each equipped with a solenoid valve for controlling the flow of fluid, and the alternating opening and closing of the two parallel pipelines can generate flow pulses in the flow rate passing through the filter under test.

2. The testing apparatus according to claim 1, characterized in that, The oil inlet pipeline includes a first oil inlet pipe and a second oil inlet pipe arranged in parallel; the oil return pipeline includes a first oil return pipe and a second oil return pipe arranged in parallel; and the filter under test includes a pressure filter and a suction filter. The first oil inlet pipe is equipped with the suction filter and the first solenoid valve, the second oil inlet pipe is equipped with the second solenoid valve, the first oil return pipe is equipped with the pressure filter and the third solenoid valve, and the second oil return pipe is equipped with the fourth solenoid valve. When the filter is under test, the third solenoid valve is de-energized and the fourth solenoid valve is energized. The alternating energization and de-energization of the first and second solenoid valves can generate flow pulses in the flow through the filter. When the filter press is under test, the first solenoid valve is de-energized, the second solenoid valve is energized, and the third and fourth solenoid valves alternately turn on and off to form a flow pulse in the flow through the filter press.

3. The testing apparatus according to claim 2, characterized in that, It also includes flow control valves; One end of the first return oil pipe and the second return oil pipe are connected, and the other end of the first return oil pipe and the second return oil pipe are respectively connected to the oil tank; The flow regulating valve is installed on the pipeline between the connection of the first return oil pipe and the second return oil pipe and the return oil port of the pump unit.

4. The testing apparatus according to claim 2, characterized in that, It also includes a first flow sensor, a second flow sensor, and a data logger; The first flow sensor is installed on the first oil inlet pipe, and the second flow sensor is installed on the first oil return pipe. Both the first flow sensor and the second flow sensor can be connected to the data logger.

5. The testing apparatus according to claim 4, characterized in that, It also includes a first differential pressure sensor and a second differential pressure sensor; One pressure-sensing end of the first differential pressure sensor is connected to the pipeline between the filter and the first flow sensor, and the other pressure-sensing end is connected to the atmosphere; One sensing end of the second differential pressure sensor is connected to the pipeline between the filter press and the second flow sensor, and the other sensing end is connected to the pipeline between the filter press and the oil tank.

6. The testing apparatus according to claim 2, characterized in that, It also includes a temperature sensor, the detection end of which extends into the oil tank to detect the temperature of the oil.

7. The testing apparatus according to claim 2, characterized in that, At least two of the suction filters are connected in series on the first oil inlet pipe.

8. The testing apparatus according to claim 2, characterized in that, At least two filter presses are connected in series on the first return oil pipe.

9. The testing apparatus according to claim 2, characterized in that, It also includes the controller; The first solenoid valve, the second solenoid valve, the third solenoid valve, and the fourth solenoid valve are all connected to the controller, and the controller is used to control the on and off time of the first solenoid valve, the second solenoid valve, the third solenoid valve, and the fourth solenoid valve.

10. The testing apparatus according to claim 2, characterized in that, The suction filter is located inside the oil tank and is connected to one end of the first oil inlet pipe that extends into the oil tank.

Images