CN110779576A - Detection equipment for proportional servo valve - Google Patents

Abstract

The invention discloses detection equipment of a proportional servo valve, which comprises a base, a first fixing seat, a test ejector rod, a dial indicator supporting seat, a force sensor, a thrust piece needle bearing, a position calibration screw, a feeding screw, a screw supporting seat, a feeding hand wheel and a test device, wherein the feeding hand wheel is connected with one end of the feeding screw, the other end of the feeding screw penetrates through the screw supporting seat and is fixedly connected with one end of the force sensor, a measuring rod of the dial indicator is connected with the position calibration screw, the position calibration screw is fixed with the feeding screw, the other end of the force sensor is connected with the test ejector rod, the test device comprises a second fixing seat and a component to be tested, which is fixed on the second fixing seat, and the component to be tested is positioned on one side of the test ejector rod. The invention can detect various parameters of the proportional servo valve, and effectively improves the detection precision, the detection efficiency and the matching qualification rate.

Description

A kind of testing equipment for proportional servo valve

technical field

The invention relates to the technical field of proportional servo valve detection, in particular to a proportional servo valve detection device.

Background technique

For the parameter detection of proportional servo valve, the detection method generally used is: use ordinary measuring tools to test some parameters. Due to the very high measurement accuracy requirements, ordinary measuring tools are difficult to measure accurately. There are also some parameters that are completely judged by hand feel and have not been quantified, and the matching pass rate is unstable, resulting in rework. However, it is difficult to improve the matching efficiency. In addition, some module parameters lack detection means, which increases the difficulty of module judgment of parameter defects after valve assembly.

Therefore, the existing technology still needs to be improved and improved.

SUMMARY OF THE INVENTION

In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a proportional servo valve detection device, which can detect various parameters of the proportional servo valve and effectively improve detection accuracy, detection efficiency and matching qualification rate.

In order to achieve the above object, the present invention has adopted the following technical solutions:

A proportional servo valve testing equipment, including a base, a first fixed seat, a test ejector rod, a dial indicator, a dial indicator support seat, a force sensor, a thrust piece needle roller bearing, a position calibration screw, a feed screw, and a screw support The first fixing seat is fixed on the base, the dial indicator support seat and the screw support seat are both installed on the first fixing seat, the feeding hand wheel The wheel 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, and the thrust sheet needle roller bearing is sleeved on the feed screw At the position close to the force sensor, the dial indicator is fixed on the dial indicator support base, and the measuring rod of the dial indicator is connected with the position calibration screw, and the position calibration screw is connected with the feeder. Fix the screw, the other end of the force sensor is connected with the test ejector rod, the test device includes a second fixing seat and a component to be tested fixed on the second fixing seat, and the second fixing seat is fixed On the base, the component to be tested is located on one side of the test ejector.

Preferably, in the proportional servo valve detection device, the component to be tested includes a first proportional electromagnet, a first displacement sensor and a first dial indicator, and the first proportional electromagnet is fixed on the second proportional solenoid. On the 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, and the thrust output of the first proportional electromagnet is The rod can be pushed by the test ram.

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

Preferably, the proportional servo valve detection device further includes a control box, an LVDT analysis board and a multimeter, the control box is provided with a power supply, and the power supply is connected to the power line of the first proportional electromagnet, and the The LVDT analysis board is connected to the first displacement sensor, and the multimeter is used to measure the feedback voltage of the control box.

Preferably, in the proportional servo valve testing equipment, the component to be tested includes a support rod, a valve body, a valve sleeve, a valve core and a second dial indicator, and the valve sleeve is fixed on the support rod, The valve body is fixedly connected with 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, and the valve core is also connected with the second hundredth. Sub-table connection.

Preferably, in the proportional servo valve testing equipment, 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, and the spring seat is fixed on the third dial indicator. On two fixed seats, the first spring and the test mounting seat are both fixed on the spring seat, the spring pressure rod is mounted on the test mounting seat and is slidably connected with the test mounting seat, the spring pressure The rod can be pushed by the test jack to squeeze the first spring, and the first spring is also connected to the third dial indicator.

Preferably, in the proportional servo valve detection device, the component to be tested includes a second spring, a second proportional electromagnet, a second displacement sensor and a fourth dial indicator, and the second proportional electromagnet is fixed on the On the second fixed seat, the second displacement sensor is connected with the thrust output rod of the second proportional electromagnet, and the second spring is fixed on the thrust output rod of the second proportional electromagnet and is located at the 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.

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

Preferably, the detection device of the proportional servo valve further comprises an oscilloscope, and the oscilloscope is electrically connected to the second proportional electromagnet.

Compared with the prior art, the detection equipment of the proportional servo valve provided by the present invention includes a base, a first fixed seat, a test ejector rod, a dial indicator, a dial indicator support seat, a force sensor, a thrust piece needle roller bearing, a position Calibration screw, feed screw, screw support seat, feed hand wheel and testing device, the first fixing seat is fixed on the base, the dial indicator support seat and the screw support seat are both installed on the first On the fixed seat, the feed handwheel is connected to one end of the feed screw, the other end of the feed screw passes through the screw support base and is fixedly connected to one end of the force sensor, and the thrust piece rolls The needle bearing is sleeved at the position where the feed screw is close to the force sensor, the dial indicator is fixed on the dial indicator support seat, and the measuring rod of the dial indicator is connected with the position calibration screw, The position calibration screw is fixed with the feed screw, the other end of the force sensor is connected with the test ejector rod, and the test device includes a second fixed seat and a test device fixed on the second fixed seat. The second fixing base is fixed on the base, and the component to be tested is located on one side of the test ejector rod. The invention can detect various parameters of the proportional servo valve, thereby effectively improving the detection precision, the detection efficiency and the matching qualification rate.

Description of drawings

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

Fig. 2 is the sectional view of A-A in Fig. 1;

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

Fig. 4 is the sectional view of B-B in Fig. 3;

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

Fig. 6 is the sectional view of C-C in Fig. 5;

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

FIG. 8 is a cross-sectional view of D-D in FIG. 7 .

Detailed ways

The present invention provides a proportional servo valve detection device. In order to make the purpose, technical solution and effect of the present invention clearer and clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

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 an intervening component may also be present. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present.

It should also be noted that the azimuth terms such as left, right, upper and lower in the embodiments of the present invention are only relative concepts to each other or refer to the normal use state of the product, and should not be regarded as limiting. .

Please refer to FIG. 1 and FIG. 2 , the detection equipment of the proportional servo valve provided in this embodiment includes a base 1, a first fixed seat 2, a test ejector rod 3, a dial indicator 4, a dial indicator support seat 5, a force sensor 6, Thrust sheet needle roller bearing 7, position calibration screw 8, feed screw 9, screw support seat 10, feed hand wheel 11 and testing device, the first fixing seat 2 is fixed on the base 1, the micrometer Both the watch support base 5 and the screw support base 10 are mounted on the first fixing base 2 , the feed hand wheel 11 is connected to one end of the feed screw 9 , and the other end of the feed screw 9 passes through the first fixed base 2 . The screw support base 10 is fixedly connected with one end of the force sensor 6, the thrust piece needle roller bearing 7 is sleeved on the feed screw 9 at the position close to the force sensor 6, and the dial indicator 4 is fixed On the dial indicator support base 5 , the measuring rod of the dial indicator 4 is connected with the position calibration screw 8 , the position calibration screw 8 is fixed with the feed screw 9 , and the force sensor 6 is The other end is connected with the test mandrel 3 , the test device includes a second fixing seat 12 and a component to be tested fixed on the second fixing seat 12 , and the second fixing seat 12 is fixed on the base 1 above, the component to be tested is located on one side of the test ejector rod 3 .

Specifically, the base 1 is the installation base of the entire equipment, the feed hand wheel 11 can drive the feed screw 9 to move forward and backward when it rotates, and the feed screw 9 can be fixed to it when it moves. The connected force sensor 6 and the test mandrel 3 fixedly connected with the force sensor 6 move, and the dial indicator 4 can read the distance moved by the feed screw 9; the test mandrel 3 is used to withstand the to-be-tested Then, the parameters to be measured of the first proportional electromagnet can be calculated through the reading of the dial indicator 3 and the reading of the force sensor 6, and the detection device of the proportional servo valve provided by the present invention can detect various parameters of the first proportional electromagnet , just replace the components to be tested as required, such as the solenoid zero position of the first proportional solenoid and the gain calibration of the proportional solenoid valve, the zero position static friction of the valve sleeve and the spool, the spring stiffness and the linearity of the spring force , dynamic response test of springs, etc., and then improve the qualified rate of product matching, which plays a decisive role in the stability of product quality in mass production. Thus, the present invention provides a plurality of embodiments of the detection device of the first proportional electromagnet.

Please continue to refer to FIG. 1 and FIG. 2 , in the first embodiment of the proportional servo valve detection device, the detection device is used to perform the electromagnet zero position detection of the first proportional solenoid and the gain calibration 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 above, the first dial indicator is connected to the first displacement sensor 14, and the first displacement sensor 14 is also connected to the thrust output rod of the first proportional electromagnet 13. The thrust output rod can be pushed by the test jack 3 .

Preferably, the first displacement sensor 14 is an LVDT displacement sensor with high sensitivity, wide linear range, and zero position recovery.

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) (not shown), a power supply is provided in the control box, the power supply is connected with the power line of the first proportional electromagnet, the LVDT analysis board is connected with the first displacement sensor, and the multimeter is used for measuring The feedback voltage of the control box.

In this embodiment, when the detection device of the proportional servo valve is performing 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 with the power supply of the first proportional electromagnet 13. Connect the LVDT analysis board to the LVDT displacement sensor 14, and ensure that the circuit is connected correctly and the circuit is normal; then supply power to the power supply of the control box, and then shake the feeding handwheel 11 clockwise, and the feeding handwheel 11 When shaking, it will drive the feed screw 9 to move in a direction close to the first proportional electromagnet 13. At this time, the test ejector rod 3 is gradually approaching the thrust output rod of the first proportional electromagnet 13. 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 is in contact with the thrust output rod of the first proportional electromagnet, and the operator immediately stops shaking the feeding hand. wheel 11, and turn the dial of the dial indicator 4 to make the reading of the dial indicator 4 return to zero; at this time, the operator has completed the debugging of the testing equipment, and can start the parameter test. Give the handwheel 11, the test mandrel 3 pushes the thrust output rod of the first proportional electromagnet 13 to move backward, observe the reading of the first dial indicator at this time, make it move to the design zero position, and complete the first proportional electromagnet At this time, use a multimeter to measure the feedback voltage of the power supply of the control box, and adjust the zero adjustment potentiometer of the LVDT analysis board at the same time, and calibrate the zero voltage at this time to 0V (voltage type to 0V voltage, current type (4 ～20mA) to 12mA), at this time, reset the dial indicator 4 to 0V voltage, the current type (4～20mA) to 12mA), and reset the first dial indicator to zero (make sure that the position of the test mandrel 3 is not correct at this time. change), continue to shake the feed handwheel 11 clockwise, observe the reading of the first dial indicator, move the reading of the first dial indicator to the design stroke position of the valve core and stop, adjust the gain adjustment potentiometer of the LVDT analysis board, observe the multimeter When the feedback voltage is adjusted to -10V, the gain calibration of the proportional servo valve is completed.

Please refer to FIG. 3 and FIG. 4 , in the second embodiment of the proportional servo valve testing device, the testing device is used to test the zero-position static friction force of the valve sleeve and the valve core, and the component to be tested includes a support Rod 15, valve body 16, valve sleeve 17, 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, and the valve sleeve 17 is fixed On the support rod 15 , the valve body 16 is fixedly connected with the valve sleeve 17 , and the valve core 18 is located in the valve sleeve 17 and can be pushed on the valve sleeve 17 by the test ejector rod 3 Moving inside, the valve core 18 is also connected with the second dial indicator.

In this embodiment, when the detection equipment of the proportional servo valve performs detection, firstly, the valve body 16 , the valve sleeve 17 and the valve core 18 are assembled on the support rod 15 , and then the valve core 18 is manually pushed to the valve sleeve 17 . The reference surface position of the top (the position shown in Figure 3 and Figure 4), slowly shake the feed handwheel 11, and make the test ejector 3 close to the top of the valve core 18, until it stops after confirming the contact (the judgment method of confirming the contact) Similar to the first embodiment, specifically observe the force reading in the force sensor 6, when the force reading in the force sensor 6 exceeds zero, it means that the test ejector rod 3 is in contact with the top of the valve core 18); after that, the operator Turn the dial of the dial indicator 4, after the reading of the dial indicator 4 is reset to zero, continue to shake the feed handwheel 11 clockwise, push the valve core 18 to move backward, and observe the reading of the second dial indicator to make it Gradually move to the design zero position. By observing the reading of the dial indicator 4, when the valve core 18 is close to the design zero position, observe the reading of the force sensor 6, so as to monitor the maximum dynamic friction force of the zero position and zero position of the valve sleeve and the valve core. .

Please refer to FIG. 5 and FIG. 6 , in the third embodiment of the proportional servo valve testing device, the testing device is used to test the stiffness of the spring and the linearity of the spring force, and the component to be tested includes a spring seat 19. The first spring 20, the spring pressure rod 21, the test mounting seat 22 and the third dial indicator (not shown in the figure), the spring seat 19 is fixed on the second fixing seat 12, the first Both the spring 20 and the test mounting seat 20 are fixed on the spring seat 19, the spring pressing rod 21 is mounted on the test mounting seat 22 and is slidably connected with the test mounting seat 22, and the spring pressing rod 21 can be The first spring 20 is pushed and squeezed by the test mandrel 3, and the first spring 20 is also connected to the third dial indicator.

In this embodiment, when the detection equipment of the proportional servo valve performs 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 position of the first spring 20. Free length, slowly shake the feed hand wheel 11, make the test ejector rod 3 close to the spring pressure rod 21, until it stops after confirming the contact (the judgment method for confirming the contact is similar to that in the first embodiment, specifically the observation force sensor The reading of the force in 6, when the reading of the force in the force sensor 6 exceeds zero, it means that the test ejector rod 3 is in contact with the spring pressure rod 21), then the operator dials the dial of the dial indicator 4, and the dial indicator 4 After the reading of the third dial indicator returns to zero, continue to shake the feed handwheel 11 clockwise, push the spring pressing rod 21 to squeeze the first spring 20, and observe the reading of the third dial indicator to gradually move it to the design zero position , By observing the reading of the dial indicator 4, when the first spring 20 is close to the design zero position, observe the reading of the force sensor 6, and realize the monitoring of the linearity of the spring stiffness and the spring force.

Please refer to FIG. 7 and FIG. 8 , in the fourth embodiment of the proportional servo valve testing device, the testing device is used to test the dynamic response of the spring, and the component to be tested includes a second spring 23 , a second A 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 fixing seat 12, and the second displacement sensor 25 Connected with 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 located at the thrust output rod of the second proportional electromagnet 24 Between the test jack 3, the second spring 23 can be pressed by the test jack 3, and the second spring 23 is also connected to the fourth dial indicator.

Preferably, the second displacement sensor 25 is an LVDT displacement sensor with high sensitivity, wide linear range, and zero position recovery.

Preferably, in the fourth embodiment of the detection device of 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 .

In this embodiment, when the detection equipment of the proportional servo valve is performing detection, the operator first installs the second spring 23 in place, electrically connects the oscilloscope and the second proportional electromagnet 24 to ensure that the connection is correct, and then slowly shakes it. Feeding the handwheel 11, when the reading of the force in the force sensor 6 exceeds zero, it means that the test ejector rod 3 is in contact with the second spring 23, and the dial of the dial indicator 4 is turned at this time, and the reading of the dial indicator 4 is After returning to zero, continue to shake the feed handwheel 11 clockwise to push the second spring to compress, while observing the reading of the fourth dial indicator to gradually move it to the design zero position; during the test, the second proportional electromagnet 24 plays a driving role. During the test, the sinusoidal operating current is input to the second proportional electromagnet 24, and the second spring 23 follows. At this time, the analyzed signal of the force sensor 6 is connected to the oscilloscope, and then the current input to the second proportional electromagnet is continuously increased. Sweep frequency, the following amplitude frequency and phase frequency of the spring force can be determined through the oscilloscope, thus completing the dynamic response test of the spring.

To sum up, the detection equipment of the proportional servo valve provided by the present invention includes a base, a first fixed seat, a test ejector rod, a dial indicator, a dial indicator support seat, a force sensor, a thrust piece needle roller bearing, and a position calibration screw , feed screw, screw support seat, feed hand wheel and test device, the first fixing seat is fixed on the base, the dial indicator support seat and the screw support seat are both installed on the first fixing seat The feed hand wheel 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, and the thrust sheet needle roller bearing Set on the position where the feed screw is close to the force sensor, the dial indicator is fixed on the dial indicator support seat, the measuring rod of the dial indicator is connected with the position calibration screw, the The position calibration screw is fixed with the feed screw, the other end of the force sensor is connected with the test ejector rod, and the test device includes a second fixing seat and a component to be tested fixed on the second fixing seat, The second fixing base is fixed on the base, and the component to be tested is located on one side of the test ejector rod. The invention can detect various parameters of the proportional servo valve, thereby effectively improving the detection precision, the detection efficiency and the matching qualification rate.

It can be understood that for those of ordinary skill in the art, equivalent replacements or changes can be made according to the technical solutions of the present invention and the inventive concept thereof, and all these changes or replacements should belong to the protection scope of the appended claims of the present invention.

Claims (9)

1. A detection device for proportional servo valve, characterized in that it comprises a base, a first fixed seat, a test ejector rod, a dial indicator, a dial indicator support seat, a force sensor, a thrust piece needle roller bearing, a position calibration screw, A feed screw, a screw support base, a feed hand wheel and a testing device, the first fixing base is fixed on the base, and the dial indicator support base and the screw support base are both installed on the first fixing base , 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 roller bearing is sleeved At the position where the feed screw is close to the force sensor, the dial indicator is fixed on the dial indicator support base, the measuring rod of the dial indicator is connected with the position calibration screw, and the position The calibration screw is fixed with the feed screw, the other end of the force sensor is connected with the test ejector rod, and the test device includes a second fixed seat and a component to be tested fixed on the second fixed seat, so The second fixing base is fixed on the base, and the component to be tested is located on one side of the test ejector rod. 2 . The detection device for proportional servo valve according to claim 1 , wherein the component to be tested comprises a first proportional electromagnet, a first displacement sensor and a first dial indicator, and the first proportional electromagnet Fixed on the second fixed seat, the first dial indicator is connected to the first displacement sensor, and the first displacement sensor is also connected to the thrust output rod of the first proportional electromagnet. The thrust output rod of the proportional electromagnet can be pushed by the test ram. 3 . The detection device of the proportional servo valve according to claim 2 , wherein the first displacement sensor is an LVDT displacement sensor. 4 . 4. The detection equipment of proportional servo valve according to claim 3, is characterized in that, also comprises control box, LVDT analysis board and multimeter, described control box is provided with power supply, described power supply and described first proportional solenoid The iron power line is connected, the LVDT analysis board is connected with the first displacement sensor, and the multimeter is used to measure the feedback voltage of the control box. 5 . The testing equipment for proportional servo valve according to claim 1 , wherein the component to be tested comprises a support rod, a valve body, a valve sleeve, a valve core and a second dial indicator, and the support rod is fixed on 5 . On the second fixed seat, the valve sleeve is fixed on the support rod, the valve body is fixedly connected with the valve sleeve, and the valve core is located in the valve sleeve and can be supported by the test ejector rod Pushed to move in the valve sleeve, the valve core is also connected with the second dial indicator. 6. The detection device for proportional servo valve according to claim 1, wherein the component to be tested comprises a spring seat, a first spring, a spring pressure rod, a test mounting seat and a third dial indicator, the spring The seat is fixed on the second fixing seat, the first spring and the test mounting seat are both fixed on the spring seat, and the spring pressure rod is mounted on the test mounting seat and slides with the test mounting seat connected, the spring pressing rod can be pushed by the test ejector rod to squeeze the first spring, and the first spring is also connected to the third dial indicator. 7 . The detection device for proportional servo valve according to claim 1 , wherein the component to be tested comprises a second spring, a second proportional electromagnet, a second displacement sensor and a fourth dial indicator. Two proportional electromagnets are fixed on the second fixed seat, the second displacement sensor is connected with the thrust output rod of the second proportional electromagnet, and the second spring is fixed on the thrust of the second proportional electromagnet on the output rod and located between the thrust output rod of the second proportional electromagnet and the test top rod, the second spring can be squeezed by the test top rod, and the second spring is also connected to the fourth hundredth sub-table. 8 . The detection device of the proportional servo valve according to claim 7 , wherein the second displacement sensor is an LVDT displacement sensor. 9 . 9 . The detection device for proportional servo valve according to claim 7 , further comprising an oscilloscope, wherein the oscilloscope is electrically connected to the second proportional electromagnet. 10 .

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