A performance testing device for a height valve test bench and a method of using the same

Abstract

The present invention discloses a performance detection device for a height valve test bench and a method for using the same, and belongs to the technical field of calibration and detection of height valve test benches. The detection device includes a control module, an air intake direction selection module, a test selection module, a delay time selection module, and a dead zone distance selection module. The output ends of the air intake direction selection module, the test selection module, the delay time selection module, and the dead zone distance selection module are all connected to the input end connected to the control module. The performance detection device for a height valve test bench proposed in the present invention can detect the height valve test bench by simulating the test parameters of the height valve. By comparing the detection data with the qualified standard data, it is determined whether the height valve test bench is qualified, thereby eliminating the factors that occur when the test fails and the height valve test bench has problems. At the same time, the height valve test bench can also be tested to ensure that the test bench itself is a qualified device.

Description

Technical Field

[0001] The invention relates to a performance detection device for a height valve test bench and a use method thereof, belonging to the technical field of calibration and detection of height valve test benches. Background Art

[0002] The height valve is used in the vehicle suspension system with air springs (air bags), and the height valve test bench is used to test the height valve. However, due to the characteristics of the height valve, the distance measured by the dead-belt test, the air supply and exhaust time measured by the action delay time test, and the air flow test are different after each test, and may even exceed the range allowed by the test requirements. It is impossible to determine whether it is a problem with the height valve body or the height valve test bench. Therefore, it is necessary to be able to test the height valve test bench.

[0003] For the non-sensing zone test of the height valve, place the detection end at any position where the valve is not supplying or exhausting air, open the passage to the atmosphere, connect the air spring passage to 600kPa compressed air, and gently move the detection end in the exhaust direction to measure the position of the detection end when the air starts to be discharged from the exhaust port, and then open the air spring passage to the atmosphere. For the air supply passage side, the above method is also used to measure the position of the detection end when the air starts to be discharged from the air spring passage. The distance between the two measured positions is required to be 6 to 14mm. Due to the characteristics of the height valve, when it is in continuous action, the distance between the two measured positions will have different results, or even fail.

[0004] For the height valve action delay time test, the time from when the lever moves 20mm upward or downward rapidly from the horizontal position to when the air supply and exhaust valves start to supply and exhaust air must be 2 to 4 seconds. Due to the characteristics of the height valve, when it operates continuously, the test results of the delay time test will be different, or even unqualified.

[0005] Altitude valve air flow test, the total air pressure of the air flow test is 600kPa, open the air supply valve and start timing until the compressed air in the 40L air cylinder reaches 200kPa, the time must be less than 40s. Or after the air cylinder is filled with 500kPa compressed air, open the exhaust valve and start timing until the compressed air drops to 300kPa, the time must be less than 40s. Due to the characteristics of the altitude valve, when it is continuously operated, the time for the air supply valve to exhaust to the specified pressure value each time will also change, and it may even fail. Summary of the invention

[0006] The purpose of the present invention is to provide a performance detection device for a height valve test bench and a method for using the same, which solves the problems existing in the prior art.

[0007] A performance testing device for a height valve test bench comprises a control module, an air intake direction selection module, a test selection module, a delay time selection module and a dead zone distance selection module. The output ends of the air intake direction selection module, the test selection module, the delay time selection module and the dead zone distance selection module are all connected to the input end of the control module.

[0008] Furthermore, the control module includes a programmable controller A01, the air intake direction selection module includes a cam switch 1SC, the test selection module includes a cam switch 2SC, the delay time selection module includes a cam switch 3SC, and the dead zone distance selection module includes a cam switch 4SC. The cam switch 1SC, the cam switch 2SC, the cam switch 3SC and the cam switch 4SC are all connected to the input end of the programmable controller A01.

[0009] Furthermore, the air intake direction selection module also includes an air intake direction selection switch, which is linked to a cam switch 1SC. The cam switch 1SC has two gears, left and right, for controlling the air intake direction of the height valve test bench performance detection equipment.

[0010] Furthermore, the test selection module also includes a test selection switch, which is linked to a cam switch 2SC. The cam switch 2SC has three gears: zeroing, LV valve and FBO valve, which are used to select the experiment type.

[0011] Furthermore, the dead zone distance selection module also includes a dead zone distance selection switch, and the dead zone distance selection switch is linked to a cam switch 3SC. The cam switch 3SC has five gears for selecting five different dead zone distances.

[0012] Furthermore, the delay time selection module also includes a delay selection switch, and the delay selection switch is linked to a cam switch 4SC. The cam switch 4SC has four gears for providing four different delay time options.

[0013] Furthermore, the detection device also includes a displacement detection module and a digital display module, the output end of the control module is connected to the digital display module, and the digital display module is connected to the displacement detection module, wherein the displacement detection module includes a displacement sensor SQ, and the digital display module includes a digital displacement meter BQ.

[0014] The displacement sensor SQ is used to measure the position of the height rod of the test bench and output the position signal to the digital displacement meter BQ. The output end of the digital position meter BQ is connected to the input end of the programmable controller A01 and is used to display the position indication according to the position signal for the operator to record;

[0015] The detection equipment also includes a solenoid valve module. The output end of the control module is also connected to the input end of the solenoid valve module. The solenoid valve module includes solenoid valve YV1, solenoid valve YV2 and solenoid valve YV3, among which solenoid valve YV1 serves as the left inflation switch of the tested valve, solenoid valve YV2 serves as the right inflation switch of the tested valve, and solenoid valve YV3 serves as the connecting switch of the tested valve.

[0016] A method for using a height valve test bench performance detection device, based on the above-mentioned height valve test bench performance detection device, the method for using includes the following steps:

[0017] S100, on the performance testing equipment of the height valve test bench, the air intake direction selection switch, the test selection switch, the dead zone distance selection switch and the delay selection switch are used to respectively select the air intake direction, the test type, the dead zone distance and the delay time of the tested tooling;

[0018] S200, select the corresponding valve model and test type on the host computer, reset the height rod on the test bench to the horizontal position, and after resetting, turn the test selection switch on the height valve test bench performance detection equipment to the clear position, and then turn it back to the corresponding model position;

[0019] S300, start the test on the test bench, and gradually carry out various tests on the tested valve. After each test step, the test bench uploads the corresponding test parameters to the upper computer, and organizes the test parameters into a test report after the test is completed;

[0020] S400, select parameters different from the previous experiment through the height valve test bench performance testing equipment, and repeat S100 to S300;

[0021] S500. Determine whether the test report is within the specified range. If so, the test bench performance is good.

[0022] Furthermore, before S100, the following preparation process is also included:

[0023] S001. Connect the host computer to the test bench, and install the valve body tooling of the height valve test bench performance detection equipment to the height valve test station of the test bench. When the height rod of the test bench is in the horizontal position, check the displacement sensor probe on the test bench. The displacement stroke of the height rod should be 50-70mm upwards.

[0024] S002. Arrange the solenoid valve connection and displacement sensor connection on the test bench, and strictly prohibit any contact between the wires and the moving area of ​​the height rod moving parts;

[0025] S003. Connect the AC220V power supply, turn on the power switch of the height valve test bench performance detection equipment, adjust the switch on the side of the tooling to the RUN position, and turn on the power supply of the programmable controller A01.

[0026] Furthermore, between S003 and S100, the following comparison and displacement process is also included:

[0027] S004. Reset the height rod of the test bench to a horizontal position, then manually move the height rod downward by 20 mm, record the position L1 of the displacement sensor of the test bench, and at the same time record the indication l1 of the digital displacement meter BQ of the height valve test bench performance test equipment through the displacement sensor SQ on the height valve test bench performance test equipment;

[0028] S005. Manually operate the height rod to move upward 40 mm, record the position L2 of the displacement sensor of the test bench, and at the same time record the indication l2 of the digital displacement meter BQ of the height valve test bench performance test equipment through the displacement sensor SQ on the height valve test bench performance test equipment, and then operate the height rod to reset horizontally;

[0029] S006. Compare L2-L1 and l2-l1 to determine whether the phase difference is greater than 0.4mm. If it exceeds this range and the displacement sensor item of the test bench is qualified during the periodic verification of the test bench function, the proportional coefficient K needs to be calculated.

[0030] K = (L2-L1) / (l2-l1)

[0031] Correspondingly, the five gears of the insensitive zone distance selection switch are adjusted to 2.5mm×K, 3mm×K, 5mm×K, 7mm×K and 7.5mm×K.

[0032] The invention has the following advantages: the performance detection device of the height valve test bench proposed by the invention can detect the height valve test bench by simulating the test parameters of the height valve. By comparing the detection data with the qualified standard data, it is judged whether the height valve test bench is qualified, eliminating the factors that the height valve test bench has problems when the test fails. At the same time, the height valve test bench can also be detected to ensure that the test bench itself is a qualified device. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the electrical structure of a height valve test bench performance detection device of the present invention;

[0034] Figure 2 It is a panel schematic diagram of a height valve test bench performance detection device of the present invention. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. 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.

[0036] It should be particularly noted that, in the absence of conflict, the embodiments disclosed in this application or the features included in the embodiments may be combined with each other.

[0037] Reference Figure 1-Figure 2 As shown, a performance detection device for a height valve test bench includes a control module, an air intake direction selection module, a test selection module, a delay time selection module and a dead zone distance selection module. The output ends of the air intake direction selection module, the test selection module, the delay time selection module and the dead zone distance selection module are all connected to the input end connected to the control module.

[0038] Furthermore, the control module includes a programmable controller A01, the air intake direction selection module includes a cam switch 1SC, the test selection module includes a cam switch 2SC, the delay time selection module includes a cam switch 3SC, and the dead zone distance selection module includes a cam switch 4SC. The cam switch 1SC, the cam switch 2SC, the cam switch 3SC and the cam switch 4SC are all connected to the input end of the programmable controller A01.

[0039] Specifically, the performance testing equipment of the height valve test bench of the present invention adopts the imported industrial controller S7-200PLC as the main control, so that the height valve filling and exhausting time can be selected, and the distance of the non-sensing zone can be selected, so as to realize the real simulation of the working condition of the height valve of the train. It has the function of calibrating the height valve test bench.

[0040] Furthermore, the air intake direction selection module also includes an air intake direction selection switch, which is linked to a cam switch 1SC. The cam switch 1SC has two gears, left and right, for controlling the air intake direction of the height valve test bench performance detection equipment.

[0041] Specifically, LV-3A and FBO-R (01) are left air intake (the height lever moves up to exhaust air, and moves down to charge air).

[0042] LV-3A-R, FBO(02), FBO(AM96) are right air intake (the altitude lever moves up to charge air, and moves down to exhaust air)

[0043] Note: FBO (02), FBO (AM96) test bench parameters: right air intake (the height lever moves up to exhaust air, and moves down to charge air)

[0044] FBO (01) test bench parameters: left air intake (the height rod moves up to charge air, and moves down to exhaust air).

[0045] The specific operation process is as follows: connect the air inlet of the height valve to 500kPa compressed air, and the air outlet to 40L air cylinder II. Move the horizontal rod upwards quickly by 20mm, so that the height valve is in the inflation position. When the air pressure of 40L air cylinder II reaches 200kPa from 0, it takes less than 40 seconds; continue to charge the air cylinder II to 500kPa in less than 44 seconds; after returning to the horizontal position, move the horizontal rod downwards quickly by 20mm, so that the height valve is in the exhaust position. When the air pressure of air cylinder II reaches 300kPa from 500kPa, it takes less than 40 seconds.

[0046] Furthermore, the test selection module also includes a test selection switch, which is linked to a cam switch 2SC. The cam switch 2SC is provided with three gear positions: zeroing, LV valve and FBO valve, for selecting the type of experiment.

[0047] Specifically, clearing means resetting the horizontal position of the displacement sensor; LV means simulating the LV type height valve test; FBO means simulating the FBO type height valve test.

[0048] Furthermore, the dead zone distance selection module also includes a dead zone distance selection switch, and the dead zone distance selection switch is linked to a cam switch 3SC. The cam switch 3SC has five gears for selecting five different dead zone distances.

[0049] Specifically, the five different insensitive zone distances are 2.5mm, 3mm, 5mm, 7mm, and 7.5mm, with a total of five levels. This distance refers to the single-sided distance from the horizontal position to the action position.

[0050] Furthermore, the delay time selection module also includes a delay selection switch, and the delay selection switch is linked to a cam switch 4SC. The cam switch 4SC has four gears for providing four different delay time options.

[0051] Specifically, the air filling and exhausting time is divided into four gears: 1.5s, 2.5s, 3.5s, and 4.5s. It is controlled by the programmable controller A01 and selected by the delay selection switch.

[0052] Furthermore, the detection device also includes a displacement detection module and a digital display module, the output end of the control module is connected to the digital display module, and the digital display module is connected to the displacement detection module, wherein the displacement detection module includes a displacement sensor SQ, and the digital display module includes a digital displacement meter BQ.

[0053] The displacement sensor SQ is used to measure the position of the height rod of the test bench and output the position signal to the digital displacement meter BQ. The output end of the digital position meter BQ is connected to the input end of the programmable controller A01 and is used to display the position indication according to the position signal for the operator to record;

[0054] The detection equipment also includes a solenoid valve module. The output end of the control module is also connected to the input end of the solenoid valve module. The solenoid valve module includes solenoid valve YV1, solenoid valve YV2 and solenoid valve YV3, among which solenoid valve YV1 serves as the left inflation switch of the tested valve, solenoid valve YV2 serves as the right inflation switch of the tested valve, and solenoid valve YV3 serves as the connecting switch of the tested valve.

[0055] Specifically, the solenoid valve YV1, the solenoid valve YV2 and the solenoid valve YV3 are used for left exhaust, right exhaust and communication respectively, and the so-called communication means that air is inflated at both ends of the valve body at the same time.

[0056] A method for using a height valve test bench performance detection device, based on the above-mentioned height valve test bench performance detection device, the method for using includes the following steps:

[0057] S100, on the performance testing equipment of the height valve test bench, the air intake direction selection switch, the test selection switch, the dead zone distance selection switch and the delay selection switch are used to respectively select the air intake direction, the test type, the dead zone distance and the delay time of the tested tooling;

[0058] S200, select the corresponding valve model and test type on the host computer, reset the height rod on the test bench to the horizontal position, and after resetting, turn the test selection switch on the height valve test bench performance detection equipment to the clear position, and then turn it back to the corresponding model position;

[0059] S300, start the test on the test bench, and gradually carry out various tests on the tested valve. After each test step, the test bench uploads the corresponding test parameters to the upper computer, and organizes the test parameters into a test report after the test is completed;

[0060] S400, select parameters different from the previous experiment through the height valve test bench performance testing equipment, and repeat S100 to S300;

[0061] S500. Determine whether the test report is within the specified range. If so, the test bench performance is good.

[0062] Furthermore, before S100, the following preparation process is also included:

[0063] S001. Connect the host computer to the test bench, and install the valve body tooling of the height valve test bench performance detection equipment to the height valve test station of the test bench. When the height rod of the test bench is in the horizontal position, check the displacement sensor probe on the test bench. The displacement stroke of the height rod should be 50-70mm upwards.

[0064] S002. Arrange the solenoid valve connection and displacement sensor connection on the test bench, and strictly prohibit any contact between the wires and the moving area of ​​the height rod moving parts;

[0065] S003. Connect the AC220V power supply, turn on the power switch of the height valve test bench performance detection equipment, adjust the switch on the side of the tooling to the RUN position, and turn on the power supply of the programmable controller A01.

[0066] Furthermore, between S003 and S100, the following comparison and displacement process is also included:

[0067] S004. Reset the height rod of the test bench to a horizontal position, then manually move the height rod downward by 20 mm, record the position L1 of the displacement sensor of the test bench, and at the same time record the indication l1 of the digital displacement meter BQ of the height valve test bench performance test equipment through the displacement sensor SQ on the height valve test bench performance test equipment;

[0068] S005. Manually operate the height rod to move upward 40 mm, record the position L2 of the displacement sensor of the test bench, and at the same time record the indication l2 of the digital displacement meter BQ of the height valve test bench performance test equipment through the displacement sensor SQ on the height valve test bench performance test equipment, and then operate the height rod to reset horizontally;

[0069] S006. Compare L2-L1 and l2-l1 to determine whether the phase difference is greater than 0.4mm. If it exceeds this range and the displacement sensor item of the test bench is qualified during the periodic verification of the test bench function, the proportional coefficient K needs to be calculated.

[0070] K = (L2-L1) / (l2-l1)

[0071] Correspondingly, the five gears of the insensitive zone distance selection switch are adjusted to 2.5mm×K, 3mm×K, 5mm×K, 7mm×K and 7.5mm×K.

[0072] The performance testing device for the height valve test bench proposed by the present invention can test the height valve test bench by simulating the test parameters of the height valve. By comparing the test data with the qualified standard data, it is judged whether the height valve test bench is qualified, eliminating the factors that cause problems in the height valve test bench when the test fails. At the same time, the height valve test bench can also be tested to ensure that the test bench itself is a qualified device.

Claims

1. A method for using a height valve test bench performance detection device, based on a height valve test bench performance detection device, the detection device comprises a control module, an air intake direction selection module, a test selection module, a delay time selection module and a dead zone distance selection module, the output ends of the air intake direction selection module, the test selection module, the delay time selection module and the dead zone distance selection module are all connected to the input end connected to the control module; The control module includes a programmable controller A01, the air intake direction selection module includes a cam switch 1SC, the test selection module includes a cam switch 2SC, the delay time selection module includes a cam switch 4SC, and the dead zone distance selection module includes a cam switch 3SC. The cam switch 1SC, the cam switch 2SC, the cam switch 3SC and the cam switch 4SC are all connected to the input end of the programmable controller A01; The air intake direction selection module further includes an air intake direction selection switch, which is linked to the cam switch 1SC. The cam switch 1SC is provided with two gears, left intake and right intake, for controlling the air intake direction of the height valve test bench performance detection equipment; The test selection module also includes a test selection switch, which is linked to the cam switch 2SC. The cam switch 2SC has three gears: reset, LV valve and FBO valve, which are used to select the test type. The dead zone distance selection module further includes a dead zone distance selection switch, the dead zone distance selection switch is linked to the cam switch 3SC, and the cam switch 3SC has five gears for selecting five different dead zone distances; The delay time selection module also includes a delay selection switch, the delay selection switch is linked to the cam switch 4SC, and the cam switch 4SC has four gears for providing four different delay time options; It is characterized in that The method of use comprises the following steps: S100, on the height valve test bench performance testing equipment, the air intake direction, test type, dead zone distance and delay time of the tested tooling are respectively selected through the air intake direction selection switch, test selection switch, dead zone distance selection switch and delay selection switch; S200, select the corresponding valve model and test type on the host computer, reset the height rod on the test bench to the horizontal position, and after resetting, turn the test selection switch on the height valve test bench performance detection equipment to the clear position, and then turn it back to the corresponding model position; S300, starting the test on the test bench, and gradually carrying out various tests on the tested valve. For each test step, the test bench uploads the corresponding test parameters to the upper computer, and organizes the test parameters into a test report after the test is completed; S400, select parameters different from the previous test through the height valve test bench performance testing equipment, and repeat S100 to S300; S500. Determine whether the test report is within the specified range. If so, the test bench performance is good.

2. The method for using the height valve test bench performance detection device according to claim 1 is characterized in that: The detection device further comprises a displacement detection module and a digital display module. The output end of the control module is connected to the digital display module, and the digital display module is connected to the displacement detection module. The displacement detection module comprises a displacement sensor SQ, and the digital display module comprises a digital displacement meter BQ. The displacement sensor SQ is used to measure the position of the height rod of the test bench, and output the position signal to the digital displacement meter BQ. The output end of the digital displacement meter BQ is connected to the input end of the programmable controller A01, and is used to display the position indication according to the position signal for the operator to record; The detection equipment also includes a solenoid valve module, the output end of the control module is also connected to the input end of the solenoid valve module, the solenoid valve module includes solenoid valve YV1, solenoid valve YV2 and solenoid valve YV3, wherein the solenoid valve YV1 serves as the left inflation switch of the tested valve, the solenoid valve YV2 serves as the right inflation switch of the tested valve, and the solenoid valve YV3 serves as the connection switch of the tested valve.

3. The method for using the height valve test bench performance detection device according to claim 1 is characterized in that: Before S100, the following preparation processes are also included: S001. Connect the host computer to the test bench, and install the valve body tooling of the height valve test bench performance detection equipment to the height valve test station of the test bench. When the height rod of the test bench is in the horizontal position, check the displacement sensor probe on the test bench. The displacement stroke of the height rod should be 50-70mm upwards. S002. Arrange the solenoid valve connection and displacement sensor connection on the test bench, and strictly prohibit any contact between the wires and the moving area of ​​the height rod moving parts; S003. Connect the AC220V power supply, turn on the power switch of the height valve test bench performance detection equipment, adjust the switch on the side of the tooling to the RUN position, and turn on the power supply of the programmable controller A01.

4. The method for using the height valve test bench performance detection device according to claim 3 is characterized in that: Between S003 and S100, the following comparison and displacement processes are also included: S004. Reset the height rod of the test bench to a horizontal position, then manually move the height rod downward by 20 mm, record the position L1 of the displacement sensor of the test bench, and at the same time record the indication l1 of the digital displacement meter BQ of the height valve test bench performance test equipment through the displacement sensor SQ on the height valve test bench performance test equipment; S005. Manually operate the height rod to move upward 40 mm, record the position L2 of the displacement sensor of the test bench, and at the same time record the indication l2 of the digital displacement meter BQ of the height valve test bench performance test equipment through the displacement sensor SQ on the height valve test bench performance test equipment, and then operate the height rod to reset horizontally; S006. Compare L2-L1 and l2-l1 to determine whether the phase difference is greater than 0.4mm. If it exceeds this range and the displacement sensor item of the test bench is qualified during the periodic verification of the test bench function, the proportional coefficient K needs to be calculated. K = (L2-L1) / (l2-l1) Correspondingly, the five gears of the insensitive zone distance selection switch are adjusted to 2.5mm×K, 3mm×K, 5mm×K, 7mm×K and 7.5mm×K.

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