CN110579344A - Double-acting linear type valve pneumatic actuator comprehensive testing device - Google Patents
Double-acting linear type valve pneumatic actuator comprehensive testing device Download PDFInfo
- Publication number
- CN110579344A CN110579344A CN201910692854.3A CN201910692854A CN110579344A CN 110579344 A CN110579344 A CN 110579344A CN 201910692854 A CN201910692854 A CN 201910692854A CN 110579344 A CN110579344 A CN 110579344A
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- guide rail
- gas
- oil
- solenoid valve
- wear
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- 238000012360 testing method Methods 0.000 title claims abstract description 19
- 238000006073 displacement reaction Methods 0.000 claims abstract description 11
- 238000001514 detection method Methods 0.000 claims abstract description 5
- 239000007788 liquid Substances 0.000 claims description 17
- 238000004146 energy storage Methods 0.000 claims description 7
- 230000000694 effects Effects 0.000 claims description 2
- 238000007789 sealing Methods 0.000 abstract description 6
- 230000005540 biological transmission Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/007—Subject matter not provided for in other groups of this subclass by applying a load, e.g. for resistance or wear testing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/008—Subject matter not provided for in other groups of this subclass by doing functionality tests
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a double-acting linear valve pneumatic actuator comprehensive testing device which comprises a support, a wear-resistant guide rail, a friction plate, an oil cylinder for pushing the friction plate, an extending beam, a force value sensor and a displacement encoder. The actuator to be tested can be operated by different human-machine operators only by mounting the actuator to be tested, so that key technical indexes of the actuator, such as strength, sealing performance, load, rated travel deviation, service life and the like, are tested, and the detection operation is convenient.
Description
Technical Field
The invention relates to a detection device, in particular to a comprehensive testing device for a double-acting linear valve pneumatic actuator.
Background
The actuator is an essential important component of an automatic control system. It is used to receive the control signal from the controller and change the size of the controlled medium to maintain the controlled variable at the required value or in certain range.
The linear actuator can be divided into a linear actuator and a rotary actuator, and the linear actuator has several key technical indexes of strength, sealing performance, load, rated stroke deviation and service life. In the existing test process, the parameters are separately tested, different devices need to be replaced in the test process, and the operation is troublesome.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a comprehensive testing device for a double-acting linear valve pneumatic actuator, which can test the items at one time and is convenient to operate.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a two effect orthoscopic valve pneumatic actuator integrated test device, which comprises a bracket, wear-resisting guide rail, the friction disc, an oil cylinder for promoting the friction disc, the overhanging beam, force value sensor and displacement encoder, the setting that wear-resisting guide rail can slide from top to bottom is on the support, the hydro-cylinder is fixed on the support, the friction disc is fixed on the output of hydro-cylinder, in operation, the hydro-cylinder promotes the friction disc and rubs with wear-resisting guide rail, wear-resisting guide rail's top is provided with the slipknot that is used for connecting the executor, displacement encoder fixes on the support, and be located wear-resisting guide rail's below, displacement encoder's sense terminal is connected with wear-resisting guide rail, the one end of overhanging beam articulates on the support, the other.
As a further improvement of the invention, the wear-resistant guide rail comprises a connecting seat, a plurality of guide rail pieces and a plurality of groups of connecting bolts, one end of each guide rail piece is fixed on the connecting seat, the friction plate is of a multi-layer structure and is arranged in a gap between the guide rail pieces in an inserting mode, the slip joint comprises an outer shell and a connecting block, a containing groove is arranged in the outer shell, the connecting seat is arranged in the containing groove, an opening for the guide rail pieces to extend into is formed in the bottom of the containing groove, a plurality of connecting holes are formed in the connecting seat, a plurality of threaded holes are formed in the guide rail pieces, after the guide rail pieces are arranged in the opening, the connecting bolts penetrate through the connecting holes and are connected with the threaded holes to connect the guide rail pieces to the connecting seat, a sliding groove in an.
As a further improvement of the invention, the oil supply device comprises an oil tank, a gas-liquid pump, a driving electromagnetic valve, an oil return electromagnetic valve, an oil pressure sensor and an energy storage tank, wherein the oil tank is connected with the gas-liquid pump, the driving electromagnetic valve is connected with the gas-liquid pump, the oil pressure sensor and the energy storage tank are arranged between the gas-liquid pump and the oil tank, an oil return pipeline is arranged between the oil tank and the oil tank, and the oil return electromagnetic valve is arranged on the oil return pipeline.
As a further improvement of the invention, the gas supply device comprises a gas source, a gas pump, a gas electromagnetic valve, a gas pressure sensor, a gas delivery electromagnetic valve and a three-position five-way electromagnetic valve, wherein the gas source is provided with a three-way gas delivery pipe, two input ends of the three-way gas delivery pipe are connected with the gas source, an output end of the three-way gas delivery pipe is connected with the three-position five-way electromagnetic valve, the three-position five-way electromagnetic valve is connected with an actuator, the gas electromagnetic valve and the gas pump are connected with one input end of the three-way gas delivery pipe, the gas delivery electromagnetic valve is connected with the other input end of the three-way gas delivery pipe, and.
The invention has the advantages that the actuator to be tested can be operated by different man-machines only by mounting the actuator to be tested, key technical indexes such as strength, sealing performance, load, rated travel deviation, service life and the like of the actuator can be tested, and the detection operation is convenient.
Drawings
FIG. 1 is a schematic diagram of the operation of the present invention;
FIG. 2 is a block diagram of the main components of the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 2 at the reference point;
Fig. 4 is a schematic diagram of the testing of actuator load.
Detailed Description
The invention will be further described in detail with reference to the following examples, which are given in the accompanying drawings.
Referring to fig. 1 to 4, the comprehensive testing device for the double-acting linear valve pneumatic actuator of the embodiment comprises a support 1, a wear-resistant guide rail 2, a friction plate 3, an oil cylinder 4 for pushing the friction plate 3, an extending beam 5, a force value sensor 6 and a displacement encoder 7, wherein the wear-resistant guide rail 2 is arranged on the support 1 in a vertically sliding manner, the oil cylinder 4 is fixed on the support 1, the friction plate 3 is fixed on the output end of the oil cylinder 4, and when the comprehensive testing device works, the oil cylinder 4 pushes the friction plate 3 to rub the wear-resistant guide rail 2, the top of the wear-resistant guide rail 2 is provided with a slip joint 8 for connecting an actuator, the displacement encoder 7 is fixed on the bracket 1, and is located the below of wear-resisting guide rail 2, and the sense terminal of displacement encoder 7 is connected with wear-resisting guide rail 2, and the one end of outrigger 5 articulates on support 1, and the other end is connected with wear-resisting guide rail 2, and force value sensor 6 is connected between support 1 and outrigger 5.
As an improved specific embodiment, the wear-resistant guide rail 2 comprises a connecting seat 21, a plurality of guide rail pieces 22 and a plurality of groups of connecting bolts 23, one end of each guide rail piece 22 is fixed on the connecting seat 21, the friction plates 3 are of a multi-layer structure and are inserted into gaps of the guide rail pieces 22, the slip knot 8 comprises an outer shell 81 and a connecting block 82, wherein a receiving groove is arranged in the outer shell 81, the connecting seat 21 is arranged in the receiving groove, an opening for the guide rail piece 22 to extend into is arranged at the bottom of the receiving groove, a plurality of connecting holes are arranged on the connecting seat 21, a plurality of threaded holes are arranged on the guide rail piece 22, after the guide rail piece 22 is installed in the opening, the connecting bolt 23 penetrates through the connecting hole and then is connected with the threaded hole, the guide rail piece 22 is connected to the connecting seat 21, the sliding groove which is in an inverted T shape is formed in the upper portion of the accommodating groove, the connecting block 82 is in an inverted T shape, and the connecting structure 83 used for being connected with the actuator is formed in the top of the connecting block 82.
As an improved specific embodiment, the system further comprises an oil supply device, wherein the oil supply device comprises an oil tank 91, a gas-liquid pump 92, a driving solenoid valve 94, an oil return solenoid valve 95, an oil pressure sensor 96 and an energy storage tank 97, the oil cylinder 4 is connected with the gas-liquid pump 92, the oil tank 91 is connected with the gas-liquid pump 92, the driving solenoid valve 94 is connected with the gas-liquid pump 92, the oil pressure sensor 96 and the energy storage tank 97 are arranged between the gas-liquid pump 92 and the oil cylinder 4, an oil return pipeline is arranged between the oil cylinder 4 and the oil tank 91, and the oil return solenoid valve 95 is arranged.
As an improved specific implementation manner, the device further comprises a gas supply device, the gas supply device comprises a gas source, a gas pump 99, a gas electromagnetic valve 100, a gas pressure sensor 101, a gas transmission electromagnetic valve 102 and a three-position five-way electromagnetic valve 103, the gas source is provided with a three-way gas transmission pipe 104, two input ends of the three-way gas transmission pipe 104 are connected to the gas source, an output end of the three-position five-way gas transmission pipe 104 is connected to the three-position five-way electromagnetic valve 103, the three-position five-way electromagnetic valve 103 is connected to an actuator, the gas electromagnetic valve 100 and the gas pump 99 are connected to one input end of the three-way gas transmission pipe 104, the gas transmission electromagnetic valve 102 is connected to the other input end of the three-.
When the strength of the actuator is tested, the gas source outputs gas, the gas is directly connected into the three-position five-way electromagnetic valve 103 or is pressurized by the gas pump 99, the pressure is alternately applied to the inside of the actuator cylinder according to the working pressure (the highest pressure value allowed to be used) of the maximum cylinder which is 1.5 times of the working pressure, and after the pressure is maintained for 3min, the end cover and the static sealing part of the actuator cylinder body are not allowed to leak and have structural deformation. The working pressure of the cylinder of the actuator is controlled by a closed-loop control system formed by the electromagnetic valve 94 driven by the high-pressure gas pump 99, the high-pressure gas pump 99 and the air pressure sensor 101, so that the air pressure fluctuation is avoided, and the test result is prevented from being influenced.
When the sealing performance of the actuator is tested, the three-position five-way electromagnetic valve 103 is controlled, compressed air with the maximum working pressure of 1.1 times is alternately applied from the two air inlets, air leakage at the positions of the piston and the output shaft is checked, pressure is maintained for 3min, and the air amount leaked from the back pressure side of each air inlet is not allowed to exceed (3+0.15D) cm 3/min; the air quantity leaking from the end cover and the output shaft is not allowed to exceed (3+0.15D) cm3/min (note: D is the inner diameter of the cylinder, D is the diameter of the output shaft, and the unit is mm). The working pressure of the cylinder of the actuator is controlled by a closed-loop control system formed by the electromagnetic valve 94 driven by the high-pressure gas pump 99, the high-pressure gas pump 99 and the air pressure sensor 101, so that the air pressure fluctuation is avoided, and the test result is prevented from being influenced.
When the rated stroke deviation is tested, the system sends a signal to the double-acting linear valve pneumatic actuating device to move the sample up and down, the wear-resistant guide rail 2 is driven, the wear-resistant guide rail 2 drives the pull wire of the displacement encoder 7 through the connection of the bottom, and therefore the rated stroke deviation is automatically acquired and calculated.
During load testing, referring to fig. 4, the actuator drives the wear-resistant guide rail 2 to move up and down, and the friction plate 3 acts positively to generate a friction force F, wherein the friction load force F is (L1 × F1)/L according to the lever principle, and F1 is a force value sensed by the force value sensor 6.
When the service life is tested, the actuator is arranged on the support 1, the valve opening and closing action process is driven to carry out cyclic operation in a simulated mode under the load of rated output torque until the output torque or thrust of the valve pneumatic device is smaller than the specified rated torque or thrust, and the action times at the moment are the service life times. When the valve pneumatic device moves up and down, the oil cylinder 4 pushes the friction plate 3 to generate friction force between the wear-resistant guide rail 2 and the clamped multilayer friction plate 3, and the force value sensor 6 detects the friction force to control the oil cylinder 4 so that the friction force meets the standard load characteristic requirement. Due to the frictional force, the load F is N μ, and N is the positive pressure of the contact surface. The friction coefficient mu is fixed and is related to the surface roughness of the materials of the wear-resistant guide rail 2 and the multi-layer friction plate 3, so that the friction force is in direct proportion to the positive pressure N provided by the oil cylinder 4, and the requirement that the friction force load F reaches the maximum nominal load M is met by changing the positive pressure N provided by the oil pressure P in the oil cylinder 4. The oil pressure P inside the cylinder 4 is N/S (M/6 μ)/(pi dd/4) 2M/3 μ pi dd, d is the cylinder diameter of the cylinder 4, and the oil pressure inside the cylinder 4 is supplied by the gas-liquid pump 92. The oil pressure in the oil cylinder 4 is controlled by a closed-loop control system formed by a driving solenoid valve 94, an oil return solenoid valve 95, the gas-liquid pump 92 and an oil pressure sensor 96, and an energy storage tank 97 mainly plays a role in stably controlling the oil pressure in a pipeline. The user sets the nominal load M of the valve pneumatic device in a control interface, the system automatically calculates the internal oil pressure value of the oil cylinder 4, sends a control signal to the driving solenoid valve 94, the gas-liquid pump 92 is started, the pipeline starts to be pressurized, the oil pressure sensor 96 feeds back an instant oil pressure value, when the oil pressure value of the pipeline reaches the set required oil pressure value, the driving solenoid valve 94 stops working, and when the oil pressure value of the pipeline exceeds the set required oil pressure value, the oil return solenoid valve 95 releases pressure, so that the internal oil pressure P of the oil cylinder 4 is stabilized at the set required value.
meanwhile, by using a double closed-loop control principle in the operation process, the system can compare the directly generated friction load force F with the nominal load M of the double-acting linear valve pneumatic actuating device, and when the directly generated friction force F is not enough than the nominal load M, the system automatically increases the preset value of the oil pressure P in the oil cylinder 4, so that the generated friction force F is kept equal to the oil pressure P in the oil cylinder 4; on the contrary, when the friction force F directly generated exceeds the nominal load M, the system automatically reduces the preset value of the oil pressure P inside the oil cylinder 4.
Through the arrangement, the actuator to be tested can be operated by different human-machine operators only by mounting the actuator to be tested, key technical indexes such as strength, sealing performance, load, rated travel deviation and service life of the actuator are tested, and detection operation is facilitated.
The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (4)
1. The utility model provides a two effect orthoscopic valve pneumatic actuator integrated test device which characterized in that: comprises a bracket (1), a wear-resistant guide rail (2), a friction plate (3), an oil cylinder (4) used for pushing the friction plate (3), an extending beam (5), a force value sensor (6) and a displacement encoder (7), wherein the wear-resistant guide rail (2) can slide up and down and is arranged on the bracket (1), the oil cylinder (4) is fixed on the bracket (1), the friction plate (3) is fixed on the output end of the oil cylinder (4), during operation, the oil cylinder (4) pushes the friction plate (3) to rub with the wear-resistant guide rail (2), the top of the wear-resistant guide rail (2) is provided with a slipknot (8) used for connecting an actuator, the displacement encoder (7) is fixed on the bracket (1) and is positioned below the wear-resistant guide rail (2), the detection end of the displacement encoder (7) is connected with the wear-resistant guide rail (2), one end of the extending beam (5) is hinged on the bracket (1, the other end is connected with the wear-resistant guide rail (2), and the force value sensor (6) is connected between the bracket (1) and the extending beam (5).
2. A double-acting linear valve pneumatic actuator comprehensive test device as claimed in claim 1, wherein: the wear-resistant guide rail (2) comprises a connecting seat (21), a plurality of guide rail pieces (22) and a plurality of groups of connecting bolts (23), one end of each guide rail piece (22) is fixed on the connecting seat (21), the friction plate (3) is of a multi-layer structure and is arranged in a gap between the plurality of guide rail pieces (22) in an inserting mode, the slip joint (8) comprises a shell (81) and a connecting block (82), an accommodating groove is formed in the shell (81), the connecting seat (21) is arranged in the accommodating groove, an opening for the guide rail pieces (22) to extend into is formed in the bottom of the accommodating groove, a plurality of connecting holes are formed in the connecting seat (21), a plurality of threaded holes are formed in the guide rail pieces (22), and after the guide rail pieces (22) are arranged in the opening, the connecting bolts (23) penetrate through the connecting holes and are connected with the threaded holes to connect the guide rail pieces (22) to the connecting, the spout that is the style of calligraphy of falling T is seted up to the top of holding tank, connecting block (82) are the style of calligraphy of falling T, connection structure (83) that are used for connecting the executor are seted up at the top of connecting block (82).
3. A double-acting linear valve pneumatic actuator comprehensive test device as claimed in claim 1, wherein: still include oil supply unit, oil supply unit includes oil tank (91), gas-liquid pump (92), drive solenoid valve (94), oil return solenoid valve (95), oil pressure sensor (96) and energy storage tank (97), hydro-cylinder (4) are connected with gas-liquid pump (92), oil tank (91) are connected with gas-liquid pump (92), drive solenoid valve (94) are connected with gas-liquid pump (92), oil pressure sensor (96) and energy storage tank (97) set up between gas-liquid pump (92) and hydro-cylinder (4), be provided with back oil pipe way between hydro-cylinder (4) and oil tank (91), back oil solenoid valve (95) set up on back oil pipe way.
4. A double-acting linear valve pneumatic actuator comprehensive test device as claimed in claim 1, wherein: still include air feeder, air feeder includes air supply, gas pump (99), gas solenoid valve (100), baroceptor (101), gas delivery solenoid valve (102) and tribit five-way solenoid valve (103), be provided with three-way gas pipe (104) on the air supply, on two inputs of three-way gas pipe (104) are connected the air supply, the output of three-way gas pipe (104) is connected on tribit five-way solenoid valve (103), tribit five-way solenoid valve (103) are connected with the executor, gas solenoid valve (100) and gas pump (99) are connected on an input of three-way gas pipe (104), gas delivery solenoid valve (102) are connected on another input of three-way gas pipe (104), baroceptor (101) are connected on the output of three-way gas pipe (104).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910692854.3A CN110579344A (en) | 2019-07-30 | 2019-07-30 | Double-acting linear type valve pneumatic actuator comprehensive testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910692854.3A CN110579344A (en) | 2019-07-30 | 2019-07-30 | Double-acting linear type valve pneumatic actuator comprehensive testing device |
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| Publication Number | Publication Date |
|---|---|
| CN110579344A true CN110579344A (en) | 2019-12-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910692854.3A Pending CN110579344A (en) | 2019-07-30 | 2019-07-30 | Double-acting linear type valve pneumatic actuator comprehensive testing device |
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| CN (1) | CN110579344A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113483143A (en) * | 2021-09-08 | 2021-10-08 | 成都迈可森流体控制设备有限公司 | Quick and accurate response split-range actuator |
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Application publication date: 20191217 |