A detection device for a proportional servo valve

Abstract

The invention discloses a detection device for a proportional servo valve, which comprises a base, a first fixing seat, a test ejector rod, a dial indicator, a dial indicator support seat, a force sensor, a thrust piece needle bearing, a position calibration screw, a feed screw, a screw support seat, a feed handwheel and a test device. One end of the feed handwheel is connected to one end of the feed screw. The other end of the feed screw passes through the screw support seat and is fixedly connected to one end of the force sensor. The measuring rod of the dial indicator is connected to the position calibration screw, and the position calibration screw is fixed to the feed screw. The other end of the force sensor is connected to the test ejector rod. The test device comprises a second fixing seat and a to-be-tested component fixed on the second fixing seat, and the to-be-tested component is located on one side of the test ejector rod. The invention can detect various parameters of the proportional servo valve, effectively improving the detection accuracy, detection efficiency and matching qualification rate.

Description

Technical Field

[0001] The present invention relates to the technical field of proportional servo valve detection, and particularly relates to a detection device for a proportional servo valve. Background Art

[0002] The general detection method for the parameters of a proportional servo valve is as follows: ordinary measuring tools are used to test some parameters. Due to the very high measurement accuracy requirements, it is very difficult for ordinary measuring tools to accurately measure. There are also some parameters that are judged entirely by feel and are not quantified, resulting in unstable matching qualification rates and causing rework. However, it is very difficult to improve the matching efficiency. In addition, there are also some module parameters lacking detection means, increasing the difficulty of judging parameter defect problems in modules after valve assembly.

[0003] Therefore, the existing technology still needs to be improved. Summary of the Invention

[0004] In view of the above deficiencies of the existing technology, the purpose of the present invention is to provide a detection device for a proportional servo valve, which can detect various parameters of the proportional servo valve, effectively improving the detection accuracy, detection efficiency and matching qualification rate.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A detection device for a proportional servo valve, comprising a base, a first fixing seat, a test ejector rod, a micrometer, a micrometer support seat, a force sensor, a thrust washer needle bearing, a position calibration screw, a feed screw, a screw support seat, a feed handwheel and a test device. The first fixing seat is fixed on the base. The micrometer support seat and the screw support seat are both installed on the first fixing seat. One end of the feed handwheel is connected to one end of the feed screw. The other end of the feed screw passes through the screw support seat and is fixedly connected to one end of the force sensor. The thrust washer needle bearing is sleeved on the feed screw near the force sensor. The micrometer is fixed on the micrometer support seat. The measuring rod of the micrometer is connected to the position calibration screw. The position calibration screw is fixed to the feed screw. The other end of the force sensor is connected to the test ejector rod. The test device includes a second fixing seat and a to-be-tested component fixed on the second fixing seat. The second fixing seat is fixed on the base. The to-be-tested component is located on one side of the test ejector rod.

[0007] Preferably, in the detection device of the proportional servo valve, the component to be measured includes a first proportional electromagnet, a first displacement sensor, and a first dial indicator. The first proportional electromagnet is fixed on the second fixed seat. The first dial indicator is connected to the first displacement sensor. The first displacement sensor is also connected to the thrust output rod of the first proportional electromagnet. The thrust output rod of the first proportional electromagnet can be pushed by the test ejector rod.

[0008] Preferably, in the detection device of the proportional servo valve, the first displacement sensor is an LVDT displacement sensor.

[0009] Preferably, the detection device of the proportional servo valve further includes a control box, an LVDT analysis board, and a multimeter. A power supply is arranged in the control box. The power supply is connected to the power cord of the first proportional electromagnet. The LVDT analysis board is connected to the first displacement sensor. The multimeter is used to measure the feedback voltage of the control box.

[0010] Preferably, in the detection device of the proportional servo valve, the component to be measured includes a support rod, a valve body, a valve sleeve, a valve core, and a second dial indicator. The valve sleeve is fixed on the support rod. The valve body is fixedly connected to the valve sleeve. The valve core is located in the valve sleeve and can be pushed by the test ejector rod to move in the valve sleeve. The valve core is also connected to the second dial indicator.

[0011] Preferably, in the detection device of the proportional servo valve, the component to be measured includes a spring seat, a first spring, a spring pressure rod, a test mounting seat, and a third dial indicator. The spring seat is fixed on the second fixed seat. The first spring and the test mounting seat are both fixed on the spring seat. The spring pressure rod is installed on the test mounting seat and is slidably connected to the test mounting seat. The spring pressure rod can be pushed by the test ejector rod to compress the first spring. The first spring is also connected to the third dial indicator.

[0012] Preferably, in the detection device of the proportional servo valve, the component to be measured includes a second spring, a second proportional electromagnet, a second displacement sensor, and a fourth dial indicator. The second proportional electromagnet is fixed on the second fixed seat. The second displacement sensor is connected to the thrust output rod of the second proportional electromagnet. The second spring is fixed on the thrust output rod of the second proportional electromagnet and is located between the thrust output rod of the second proportional electromagnet and the test ejector rod. The second spring can be compressed by the test ejector rod. The second spring is also connected to the fourth dial indicator.

[0013] Preferably, in the detection device of the proportional servo valve, the second displacement sensor is an LVDT displacement sensor.

[0014] Preferably, the detection device for the proportional servo valve further includes an oscilloscope, and the oscilloscope is electrically connected to the second proportional electromagnet.

[0015] Compared with the prior art, the detection device for the proportional servo valve provided by the present invention includes a base, a first fixing seat, a test ejector rod, a micrometer, a micrometer support seat, a force sensor, a thrust piece needle bearing, a position calibration screw, a feed screw, a screw support seat, a feed handwheel, and a test device. The first fixing seat is fixed on the base, the micrometer support seat and the screw support seat are both installed on the first fixing seat, one end of the feed handwheel is connected to one end of the feed screw, the other end of the feed screw passes through the screw support seat and is fixedly connected to one end of the force sensor, the thrust piece needle bearing is sleeved at a position of the feed screw close to the force sensor, the micrometer is fixed on the micrometer support seat, the measuring rod of the micrometer is connected to the position calibration screw, the position calibration screw is fixed to the feed screw, the other end of the force sensor is connected to the test ejector rod, the test device includes a second fixing seat and a to-be-tested component fixed on the second fixing seat, the second fixing seat is fixed on the base, and the to-be-tested component is located on one side of the test ejector rod. The present invention can detect various parameters of the proportional servo valve, effectively improving the detection accuracy, detection efficiency, and matching qualification rate. Description of the Drawings

[0016] Figure 1 It is a schematic structural diagram of the first preferred embodiment of the detection device for the proportional servo valve provided by the present invention;

[0017] Figure 2 is Figure 1 the sectional view taken along A-A in

[0018] Figure 3 It is a schematic structural diagram of the second preferred embodiment of the detection device for the proportional servo valve provided by the present invention;

[0019] Figure 4 is Figure 3 the sectional view taken along B-B in

[0020] Figure 5 It is a schematic structural diagram of the third preferred embodiment of the detection device for the proportional servo valve provided by the present invention;

[0021] Figure 6 is Figure 5 the sectional view taken along C-C in

[0022] Figure 7 It is a schematic structural diagram of the fourth preferred embodiment of the detection device for the proportional servo valve provided by the present invention;

[0023] Figure 8 isFigure 7 Cross-sectional view of D-D in the middle. Specific implementation manner

[0024] The present invention provides a detection device for a proportional servo valve. To make the objectives, technical solutions and effects of the present invention clearer and more definite, the following further describes the present invention in detail with reference to the accompanying drawings and by way of examples. It should be understood that the specific examples described herein are only used to explain the present invention and are not used to limit the present invention.

[0025] It should be noted that when a component is referred to as being "mounted on", "fixed to" or "disposed on" another component, it can be directly on the other component or there may be an intermediate component at the same time. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or there may be an intermediate component at the same time.

[0026] It should also be noted that the terms of orientation such as left, right, up, and down in the embodiments of the present invention are only relative concepts to each other or are referenced based on the normal use state of the product, and should not be considered restrictive.

[0027] Please refer to Figure 1 and Figure 2 As shown in, the detection device for a proportional servo valve provided in this embodiment includes a base 1, a first fixing seat 2, a test ejector rod 3, a micrometer 4, a micrometer support seat 5, a force sensor 6, a thrust piece needle bearing 7, a position calibration screw 8, a feed screw 9, a screw support seat 10, a feed handwheel 11 and a test device. The first fixing seat 2 is fixed on the base 1. The micrometer support seat 5 and the screw support seat 10 are both installed on the first fixing seat 2. One end of the feed handwheel 11 is connected to one end of the feed screw 9. The other end of the feed screw 9 passes through the screw support seat 10 and is fixedly connected to one end of the force sensor 6. The thrust piece needle bearing 7 is sleeved on the feed screw 9 near the force sensor 6. The micrometer 4 is fixed on the micrometer support seat 5. The measuring rod of the micrometer 4 is connected to the position calibration screw 8. The position calibration screw 8 is fixed to the feed screw 9. The other end of the force sensor 6 is connected to the test ejector rod 3. The test device includes a second fixing seat 12 and a to-be-tested component fixed on the second fixing seat 12. The second fixing seat 12 is fixed on the base 1. The to-be-tested component is located on one side of the test ejector rod 3.

[0028] Specifically, the base 1 is the installation base of the entire device. When the feed handwheel 11 rotates, it can drive the feed screw 9 to move back and forth. When the feed screw 9 moves, it can drive the force sensor 6 fixedly connected thereto and the test ejector rod 3 fixedly connected to the force sensor 6 to move. The dial indicator 4 can read the distance that the feed screw 9 moves. The test ejector rod 3 is used to press against the component to be tested. Thus, the parameters to be measured of the first proportional electromagnet can be calculated through the readings of the dial indicator 3 and the force sensor 6. The detection device for the proportional servo valve provided by the present invention can detect various parameters of the first proportional electromagnet. Only the component to be tested needs to be replaced according to requirements. For example, the zero position of the electromagnet of the first proportional electromagnet and the gain calibration of the proportional solenoid valve, the zero position static friction force between the valve sleeve and the valve core, the spring stiffness and the linearity of the spring force, the dynamic response test of the spring, etc. Thereby, the qualified rate of product matching is improved, which plays a decisive role in the stability of product quality in mass production. Therefore, the present invention provides embodiments of the detection device for multiple first proportional electromagnets.

[0029] Please continue to refer to Figure 1 and Figure 2 In the first embodiment of the detection device for the proportional servo valve, the detection device is used for detecting the zero position of the electromagnet of the first proportional electromagnet and calibrating the gain of the proportional solenoid valve. The component to be tested includes a first proportional electromagnet 13, a first displacement sensor 14, and a first dial indicator (not shown in the figure). The first proportional electromagnet 13 is fixed on the second fixed seat 12. The first dial indicator is connected to the first displacement sensor 14. The first displacement sensor 14 is also connected to the thrust output rod of the first proportional electromagnet 13. The thrust output rod of the first proportional electromagnet 13 can be pushed by the test ejector rod 3.

[0030] Preferably, the first displacement sensor 14 is an LVDT displacement sensor, which has high sensitivity, a wide linear range, and a recoverable zero position.

[0031] Preferably, in the first embodiment of the detection device for the proportional servo valve, the detection device further includes a control box (not shown in the figure), an LVDT analysis board (not shown in the figure), and a multimeter (not shown in the figure). A power supply is provided in the control box. The power supply is connected to the power cord of the first proportional electromagnet. The LVDT analysis board is connected to the first displacement sensor. The multimeter is used to measure the feedback voltage of the control box.

[0032] In this embodiment, when the detection device of the proportional servo valve performs detection, the first proportional electromagnet 13 is installed on the second fixed seat 12, and then the power supply in the control box is connected to the power line of the first proportional electromagnet 13. The LVDT analysis board is connected to the LVDT displacement sensor 14, and it is ensured that the circuit connection is correct and the circuit is normal. Then, the power supply of the control box is powered on. At this time, the feed handwheel 11 is shaken clockwise. When the feed handwheel 11 is shaken, it will drive the feed screw 9 to move in the direction close to the first proportional electromagnet 13. At this time, the test ejector rod 3 gradually approaches the thrust output rod of the first proportional electromagnet. The tester observes the reading of the force in the force sensor 6. When the reading of the force in the force sensor 6 exceeds zero, it means that the test ejector rod 3 abuts against the thrust output rod of the first proportional electromagnet. The operator immediately stops shaking the feed handwheel 11 and turns the dial of the micrometer 4 to zero the reading of the micrometer 4. At this time, the operator completes the debugging of the detection device and can start parameter testing. The operator continues to shake the feed handwheel 11 clockwise. The test ejector rod 3 pushes the thrust output rod of the first proportional electromagnet 13 to move backward. At this time, observe the reading of the first dial indicator and move it to the designed zero position to complete the zero position test of the first proportional electromagnet. At this time, use a multimeter to measure the feedback voltage of the power supply of the control box, and at the same time adjust the zero position adjustment potentiometer of the LVDT analysis board. Calibrate the zero position voltage at this time to 0V (give 0V voltage for voltage type, and give 12mA for current type (4 - 20mA)). At this time, reset the micrometer 4 to 0V voltage, give 12mA for current type (4 - 20mA), and reset the first dial indicator to zero (ensure that the position of the test ejector rod 3 remains unchanged at this time). Continue to shake the feed handwheel 11 clockwise, observe the reading of the first dial indicator, and stop after moving the reading of the first dial indicator to the valve core design stroke position. Adjust the gain adjustment potentiometer of the LVDT analysis board and observe the feedback voltage of the multimeter. When it is adjusted to -10V, the gain calibration of the proportional servo valve is completed.

[0033] Please refer to Figure 3 and Figure 4 In the second embodiment of the detection device of the proportional servo valve, the detection device is used to perform the zero position static friction test of the valve sleeve and the valve core. The component to be tested includes a support rod 15, a valve body 16, a valve sleeve 17, a valve core 18, and a second dial indicator (not shown in the figure). The support rod 15 is fixed on the second fixed seat 12. The valve sleeve 17 is fixed on the support rod 15. The valve body 16 is fixedly connected to the valve sleeve 17. The valve core 18 is located in the valve sleeve 17 and can be pushed by the test ejector rod 3 to move in the valve sleeve 17. The valve core 18 is also connected to the second dial indicator.

[0034] In this embodiment, when the detection device for the proportional servo valve performs detection, first, the valve body 16, valve sleeve 17, and valve core 18 are assembled and installed on the support rod 15, and then the valve core 18 is manually pushed to the reference surface position at the top of the valve sleeve 17 ( Figure 3 and Figure 4 the positions shown). Slowly shake the feed handwheel 11 to make the test ejector rod 3 approach the top of the valve core 18 until it stops after confirming contact (the method for judging contact confirmation is similar to that in the first embodiment. Specifically, observe the reading of the force in the force sensor 6. When the reading of the force in the force sensor 6 exceeds zero, it indicates that the test ejector rod 3 contacts the top of the valve core 18); then the operator turns the dial of the micrometer 4, zeros the reading of the micrometer 4, and continues to shake the feed handwheel 11 clockwise to push the valve core 18 to move backward. At the same time, observe the reading of the second dial indicator and make it gradually move to the designed zero position. By observing the reading of the micrometer 4, when the valve core 18 approaches the designed zero position, observe the reading of the force sensor 6 to monitor the maximum dynamic friction force at the zero position of the valve sleeve and the valve core.

[0035] Please refer to Figure 5 and Figure 6 , in the third embodiment of the detection device for the proportional servo valve, the detection device is used to test the stiffness of the spring and the linearity of the spring force. The component to be tested includes a spring seat 19, a first spring 20, a spring pressure rod 21, a test mounting seat 22, and a third dial indicator (not shown in the figure). The spring seat 19 is fixed on the second fixed seat 12. The first spring 20 and the test mounting seat 20 are both fixed on the spring seat 19. The spring pressure rod 21 is installed on the test mounting seat 22 and is slidably connected to the test mounting seat 22. The spring pressure rod 21 can be pushed by the test ejector rod 3 to squeeze the first spring 20, and the first spring 20 is also connected to the third dial indicator.

[0036] In this embodiment, when the detection device for the proportional servo valve conducts detection, the operator first installs the first spring 20 on the spring seat 19, and then adjusts the zero position of the third dial indicator to the free length of the first spring 20. Slowly shake the feed handwheel 11 to make the test ejector rod 3 approach the spring pressure rod 21 until it stops after confirming contact (the method for judging contact is similar to that in the first embodiment, specifically, observing the force reading in the force sensor 6. When the force reading in the force sensor 6 exceeds zero, it indicates that the test ejector rod 3 contacts the spring pressure rod 21). After that, the operator turns the dial of the micrometer 4, zeros the reading of the micrometer 4, and then continues to shake the feed handwheel 11 clockwise to push the spring pressure rod 21 to compress the first spring 20. At the same time, observe the reading of the third dial indicator and make it gradually move to the designed zero position. By observing the reading of the micrometer 4, when the first spring 20 approaches the designed zero position, observe the reading of the force sensor 6 to monitor the spring stiffness and the linearity of the spring force.

[0037] Please refer to Figure 7 and Figure 8 , in the fourth embodiment of the detection device for the proportional servo valve, the detection device is used for the dynamic response test of the spring. The component to be tested includes a second spring 23, a second proportional electromagnet 24, a second displacement sensor 25, and a fourth dial indicator (not shown in the figure). The second proportional electromagnet 24 is fixed on the second fixed seat 12. The second displacement sensor 25 is connected to the thrust output rod of the second proportional electromagnet 24. The second spring 23 is fixed on the thrust output rod of the second proportional electromagnet 24 and is located between the thrust output rod of the second proportional electromagnet 24 and the test ejector rod 3. The second spring 23 can be compressed by the test ejector rod 3, and the second spring 23 is also connected to the fourth dial indicator.

[0038] Preferably, the second displacement sensor 25 is an LVDT displacement sensor, which has high sensitivity, a wide linear range, and a recoverable zero position.

[0039] Preferably, in the fourth embodiment of the detection device for the proportional servo valve, the detection device further includes an oscilloscope (not shown in the figure), and the oscilloscope is electrically connected to the second proportional electromagnet 24.

[0040] In this embodiment, when the detection device of the proportional servo valve conducts detection, the operator first installs the second spring 23 in place, electrically connects the oscilloscope to the second proportional electromagnet 24 and ensures the connection is correct, and then slowly shakes the feed handwheel 11. When the reading of the force in the force sensor 6 exceeds zero, it indicates that the test ejector rod 3 contacts the second spring 23. At this time, turn the dial of the micrometer 4, zero the reading of the micrometer 4, and then continue to shake the feed handwheel 11 clockwise to push the second spring to compress. At the same time, observe the reading of the fourth dial indicator and make it gradually move to the designed zero position; during the test, the second proportional electromagnet 24 plays a driving role. During the test, a sinusoidal working current is input to the second proportional electromagnet 24, and the second spring 23 follows. At this time, the signal analyzed by the force sensor 6 is connected to the oscilloscope, and then continuously increase the current sweep frequency input to the second proportional electromagnet. The follow-up amplitude-frequency and phase-frequency of the spring force can be determined through the oscilloscope, thereby completing the dynamic response test of the spring.

[0041] In summary, the detection device of the proportional servo valve provided by the present invention includes a base, a first fixed seat, a test ejector rod, a micrometer, a micrometer support seat, a force sensor, a thrust piece needle bearing, a position calibration screw, a feed screw, a screw support seat, a feed handwheel, and a test device. The first fixed seat is fixed on the base. The micrometer support seat and the screw support seat are both installed on the first fixed seat. One end of the feed handwheel is connected to the feed screw. The other end of the feed screw passes through the screw support seat and is fixedly connected to one end of the force sensor. The thrust piece needle bearing is sleeved on the feed screw near the force sensor. The micrometer is fixed on the micrometer support seat. The measuring rod of the micrometer is connected to the position calibration screw, and the position calibration screw is fixed to the feed screw. The other end of the force sensor is connected to the test ejector rod. The test device includes a second fixed seat and a to-be-tested component fixed on the second fixed seat. The second fixed seat is fixed on the base. The to-be-tested component is located on one side of the test ejector rod. The present invention can detect various parameters of the proportional servo valve, effectively improving the detection accuracy, detection efficiency, and matching qualification rate.

[0042] It can be understood that for those of ordinary skill in the art, equivalent substitutions or changes can be made according to the technical solution and inventive concept of the present invention, and all such changes or substitutions should fall within the protection scope of the claims appended to the present invention.

Claims

1. A detection device for a proportional servo valve, characterized in that, It includes a base, a first fixing seat, a test ejector rod, a micrometer, a micrometer support seat, a force sensor, a thrust washer needle bearing, a position calibration screw, a feed screw, a screw support seat, a feed handwheel and a test device. The first fixing seat is fixed on the base. The micrometer support seat and the screw support seat are both installed on the first fixing seat. One end of the feed handwheel is connected to one end of the feed screw. The other end of the feed screw passes through the screw support seat and is fixedly connected to one end of the force sensor. The thrust washer needle bearing is sleeved on the feed screw near the force sensor. The micrometer is fixed on the micrometer support seat. The measuring rod of the micrometer is connected to the position calibration screw. The position calibration screw is fixed to the feed screw. The other end of the force sensor is connected to the test ejector rod. The test device includes a second fixing seat and a component to be tested fixed on the second fixing seat. The second fixing seat is fixed on the base. The component to be tested is located on one side of the test ejector rod; The component to be tested includes a first proportional electromagnet, a first displacement sensor and a first dial indicator. The first proportional electromagnet is fixed on the second fixing seat. The first dial indicator is connected to the first displacement sensor. The first displacement sensor is also connected to the thrust output rod of the first proportional electromagnet. The thrust output rod of the first proportional electromagnet can be pushed by the test ejector rod; The component to be tested includes a support rod, a valve body, a valve sleeve, a valve core and a second dial indicator. The support rod is fixed on the second fixing seat. The valve sleeve is fixed on the support rod. The valve body is fixedly connected to the valve sleeve. The valve core is located in the valve sleeve and can be pushed by the test ejector rod to move in the valve sleeve. The valve core is also connected to the second dial indicator.

2. The detection device for a proportional servo valve according to claim 1, characterized in that, The first displacement sensor is an LVDT displacement sensor.

3. The detection device for a proportional servo valve according to claim 2, characterized in that, It also includes a control box, an LVDT analysis board and a multimeter. A power supply is arranged in the control box. The power supply is connected to the power cord of the first proportional electromagnet. The LVDT analysis board is connected to the first displacement sensor. The multimeter is used to measure the feedback voltage of the control box.

4. The detection device for a proportional servo valve according to claim 1, characterized in that, The component to be tested includes a spring seat, a first spring, a spring pressure rod, a test mounting seat and a third dial indicator. The spring seat is fixed on the second fixing seat. The first spring and the test mounting seat are both fixed on the spring seat. The spring pressure rod is installed on the test mounting seat and is slidably connected to the test mounting seat. The spring pressure rod can be pushed by the test ejector rod to compress the first spring. The first spring is also connected to the third dial indicator.

5. The detection device for a proportional servo valve according to claim 1, characterized in that, The component to be measured includes a second spring, a second proportional electromagnet, a second displacement sensor, and a fourth dial indicator. The second proportional electromagnet is fixed on the second fixed seat. The second displacement sensor is connected to the thrust output rod of the second proportional electromagnet. The second spring is fixed on the thrust output rod of the second proportional electromagnet and is located between the thrust output rod of the second proportional electromagnet and the test ejector rod. The second spring can be squeezed by the test ejector rod, and the second spring is also connected to the fourth dial indicator.

6. The detection device for a proportional servo valve according to claim 5, characterized in that, The second displacement sensor is an LVDT displacement sensor.

7. The detection device for a proportional servo valve according to claim 5, characterized in that, It further includes an oscilloscope, and the oscilloscope is electrically connected to the second proportional electromagnet.

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