CN113237645A - Multifunctional testing machine for electric actuator - Google Patents
Multifunctional testing machine for electric actuator Download PDFInfo
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- CN113237645A CN113237645A CN202110499660.9A CN202110499660A CN113237645A CN 113237645 A CN113237645 A CN 113237645A CN 202110499660 A CN202110499660 A CN 202110499660A CN 113237645 A CN113237645 A CN 113237645A
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- 238000012360 testing method Methods 0.000 title claims abstract description 67
- 238000001514 detection method Methods 0.000 claims abstract description 115
- 238000013016 damping Methods 0.000 claims abstract description 75
- 238000006073 displacement reaction Methods 0.000 claims description 30
- 230000001105 regulatory effect Effects 0.000 claims description 18
- 230000033001 locomotion Effects 0.000 claims description 14
- 230000005540 biological transmission Effects 0.000 claims description 12
- 238000011990 functional testing Methods 0.000 claims description 11
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 5
- 230000000903 blocking effect Effects 0.000 claims description 4
- 230000001276 controlling effect Effects 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 239000002828 fuel tank Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 description 8
- 238000000926 separation method Methods 0.000 description 5
- 238000011056 performance test Methods 0.000 description 4
- 230000001934 delay Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/34—Testing dynamo-electric machines
Abstract
The invention relates to the technical field of product testing, in particular to a multifunctional testing machine for an electric actuator, which comprises a rack, a loading assembly and a detection module, wherein the loading assembly is used for loading a tested electric actuator, the detection module is used for testing the performance of the tested electric actuator, the loading assembly comprises a moving part which is connected with the output end of the tested electric actuator and only moves along the axial direction of the tested electric actuator, and the detection module comprises a torque force detection assembly, a speed detection assembly, a damping control assembly, a pull pressure detection assembly, a time delay device and a counter; the end part of the moving part is coaxially and fixedly connected with the output end of the damping control assembly, the torsion detection assembly, the speed detection assembly and the damping control assembly are fixedly arranged relative to the rack, and the tension and pressure detection assembly is arranged at the connection part of the moving part and the damping control assembly; the scheme can effectively realize multifunctional detection on the rotating speed, the torque, the pushing force and the service life of the electric actuator, and has stable structure and high safety.
Description
Technical Field
The invention relates to the technical field of product testing, in particular to a multifunctional testing machine for an electric actuator.
Background
Electric actuator is often used in various control valves, drives its inside transmission nut through inside motor and carries out the circumferential direction rotation and carry out power take off. Generally, the electric actuator needs to be tested for multiple functions, which mainly include rotating speed, pushing pressure, service life and the like, and in addition, the transmission nut is also subjected to reverse torque action in the working process, and the test is also needed. The existing equipment can only test one item or two items, and a tester which can meet different testing requirements is lacked.
Disclosure of Invention
In order to solve the technical problem, a multifunctional testing machine for an electric actuator is provided.
In order to achieve the above purposes, the technical scheme adopted by the invention is as follows:
a multifunctional testing machine for an electric actuator is used for testing the function of the electric actuator and comprises a machine frame, a loading assembly used for loading a tested electric actuator and a detection module used for testing the performance of the tested electric actuator,
the loading assembly comprises a moving part which is connected with the output end of the tested electric actuator and only moves along the axial direction of the tested electric actuator, and the detection module comprises a torque detection assembly, a speed detection assembly, a damping control assembly, a tension and pressure detection assembly, a time delay device and a counter; the end part of the moving part is coaxially and fixedly connected with the output end of the damping control assembly, the torsion detection assembly, the speed detection assembly and the damping control assembly are fixedly arranged relative to the rack, and the tension and pressure detection assembly is arranged at the connection part of the moving part and the damping control assembly;
wherein the content of the first and second substances,
the torsion detection assembly is used for realizing a first function test, namely testing the torsion performance of the tested electric actuator;
the speed detection assembly is matched with the damping control assembly to realize a second function test, namely the speed performance of the tested electric actuator is tested;
the pull pressure detection assembly is matched with the damping control assembly to realize a third function test, namely the pull pressure performance of the tested electric actuator is tested;
the damping control assembly, the pull pressure detection assembly, the time delay device and the counter are matched to realize a fourth function test, namely the service life performance of the tested electric actuator is tested.
Preferably, the moving part is the lead screw that has seted up the spout along the axis direction on the perisporium, and the lead screw links with the drive nut screw thread of being surveyed electric actuator, and the loading subassembly still includes:
one end of the bearing frame is fixedly connected with the damping control assembly, the other end of the bearing frame is fixedly connected with the tested electric actuator, and the bearing frame is used for bearing the tested electric actuator;
the guide flat key is fixedly arranged in the rack and is in sliding fit with the sliding groove on the peripheral wall of the movable part.
Preferably, the speed detection assembly comprises:
the detection rod is fixedly arranged relative to the movable piece;
stay cord displacement sensor, stay cord displacement sensor set up in the frame, and stay cord displacement sensor's output is connected with the one end of measuring bar, and stay cord displacement sensor is used for detecting the velocity of motion of moving part through the measuring bar is indirect.
Preferably, the speed detection assembly further comprises a separation blade arranged at the other end of the detection rod, an upper proximity switch and a lower proximity switch which are fixed on the rack in a linearly distributed manner along the vertical direction, and the separation blade can trigger the upper proximity switch and the lower proximity switch along with the moving part in the moving process.
Preferably, the damping control assembly comprises:
the oil cylinder is fixedly connected with the rack, the output end of the oil cylinder is fixedly connected with the end part of the movable part, the output shaft of the oil cylinder is collinear with the axis of the movable part, and the oil cylinder is used for applying damping opposite to the movement direction of the movable part to the movable part;
an oil tank;
the oil circuit is provided with a pair of oil circuits, two ends of each oil circuit are respectively communicated with the oil cylinder and the oil tank, and a first branch circuit and a second branch circuit which are mutually connected in parallel are arranged between main circuits of the oil circuits communicated to the oil cylinder and the oil tank;
the electromagnetic valves are provided with a pair of oil passages and are respectively arranged on the first branches of the pair of oil passages, and the electromagnetic valves are used for controlling the opening and closing of the first branches;
and the flow regulating valves are provided with a pair of valves and are respectively arranged on the second branches of the pair of oil paths, and the flow regulating valves are used for regulating the opening degree of the second branches.
Preferably, the connection between the oil cylinder and the movable piece is connected through a conversion joint.
Preferably, the main line and the first branch line of the oil line are both provided with ball valves which can be manually adjusted to be opened and closed.
Preferably, at least one internal pressure control assembly is arranged on the oil path.
Preferably, the frame is including setting up the portable rack in order to provide the removal function in the bottom, fixed mounting is at the one-level support of portable rack upper end, and fixed mounting is at the second grade support of one-level support upper end, the one-level support, the second grade support all sets up with surveyed electric actuator axis collineation, second grade support upper end is equipped with the recess that supplies torsion detection unit to install, portable rack bottom is equipped with the gyro wheel, portable rack and damping control subassembly fixed connection, speed detection unit fixes on the one-level support, the second grade support is the hollow structure that can supply the moving part to pass.
Preferably, the movable rack, the primary support and the secondary support are in flange connection with each other.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention can carry out four functional tests of torsion, speed, pull pressure and service life on the tested electric actuator by using the mutual cooperation of the torsion detection assembly, the speed detection assembly, the damping control assembly, the pull pressure detection assembly, the time delay device and the counter by using the movable part as a detection target, thereby meeting various different test requirements.
2. The damping control assembly can conveniently adjust the damping, and particularly, a pair of oil paths communicated with the oil cylinder respectively and alternately achieve the oil inlet and oil outlet effects on the oil cylinder through the cooperation with the oil tank. When the moving part moves, the output shaft of the oil cylinder is driven to move, and then oil flows in and out alternately in the pair of oil passages. When the controller opens the pair of electromagnetic valves, oil can flow with the minimum resistance through the main circuit and the first branch circuit, so that the damping exerted by the output end of the oil cylinder on the moving part is the minimum, and the test condition of the first interval in the fourth function test is met; when the displacement of the movable piece falls in the second interval in the fourth function test, the controller closes the electromagnetic valve on the oil outlet state in the pair of oil passages, and the oil flowing out of the oil cylinder can only flow through the second branch and is controlled by the flow regulating valve. The controller sends a signal to the flow regulating valve to regulate the opening of the flow regulating valve, so that the flow speed of the oil is smaller than the normal flow speed of the oil in the first branch, and the full-load effect is achieved.
3. The invention can effectively eliminate the influence caused by the working fault of the stay cord displacement sensor and improve the working stability by arranging the second speed detection structures such as the upper proximity switch and the lower proximity switch, particularly, the displacement of the moving part is detected by additionally arranging the upper proximity switch and the lower proximity switch and taking the blocking piece arranged at the other end of the detection rod as a detection object, and the second function test of the tested electric actuator, namely the detection of the speed performance can be independently realized by combining the preset distance between the upper proximity switch and the lower proximity switch as a standby scheme of the stay cord displacement sensor, so the working stability is improved.
4. The internal pressure control assembly can effectively prevent the working pressure of the oil cylinder from exceeding a safety range, and the overall safety of the testing machine is improved.
Drawings
FIG. 1 is a first perspective view of the present invention;
FIG. 2 is a second perspective view of the present invention;
FIG. 3 is a front view of the present invention;
FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3 in accordance with the present invention;
FIG. 5 is a perspective view of FIG. 4 of the present invention;
FIG. 6 is an enlarged view of a portion of the present invention shown at B in FIG. 4;
FIG. 7 is a side view of the present invention;
FIG. 8 is an enlarged view of a portion of the present invention at C of FIG. 2;
FIG. 9 is a perspective view of the damping control assembly of the present invention;
fig. 10 is a perspective view of the stand of the present invention.
The reference numbers in the figures are:
1-a frame; 1 a-a mobile gantry; 1 b-primary scaffold; 1 c-a secondary scaffold;
2-a loading assembly; 2 a-a moving part; 2 b-a carrier; 2 c-a guide flat key;
3-a torque detection assembly;
4-a speed detection component; 4 a-a detection rod; 4 b-a pull rope displacement sensor; 4 c-an upper proximity switch; 4 d-lower proximity switch; 4 e-a baffle plate;
5-a damping control assembly; 5 a-oil cylinder; 5 b-oil tank; 5 c-oil path; 5c1 — first branch; 5c2 — second branch; 5 d-electromagnetic valve; 5 e-a flow regulating valve; 5 f-a crossover joint; 5 g-ball valve; 5 h-internal pressure control assembly;
6-pulling and pressing force detection assembly.
Detailed Description
The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art.
In order to solve the technical problem of performing multiple functional tests on the electric actuator, as shown in fig. 1 to 10, the following technical solutions are provided:
a multifunctional testing machine for an electric actuator is used for testing the function of the electric actuator and comprises a machine frame 1, a loading assembly 2 used for loading a tested electric actuator and a detection module used for testing the performance of the tested electric actuator,
the loading assembly 2 comprises a moving piece 2a which is connected with the output end of the tested electric actuator and only moves along the axial direction of the tested electric actuator, and the detection module comprises a torsion detection assembly 3, a speed detection assembly 4, a damping control assembly 5, a pull pressure detection assembly 6, a time delay device and a counter; the end part of the moving part 2a is coaxially and fixedly connected with the output end of the damping control component 5, the torsion detection component 3, the speed detection component 4 and the damping control component 5 are all fixedly arranged relative to the frame 1, and the tension pressure detection component 6 is arranged at the connecting part of the moving part 2a and the damping control component 5;
wherein the content of the first and second substances,
the torsion detection assembly 3 is used for realizing a first function test, namely testing the torsion performance of the tested electric actuator;
the speed detection component 4 is matched with the damping control component 5 to realize a second function test, namely the speed performance of the tested electric actuator is tested;
the pull pressure detection assembly 6 is matched with the damping control assembly 5 to realize a third function test, namely the pull pressure performance of the tested electric actuator is tested;
the damping control assembly 5, the pull pressure detection assembly 6, the time delay device and the counter are matched to realize a fourth function test, namely the service life performance of the tested electric actuator is tested.
Specifically, the torque detection assembly 3, the speed detection assembly 4, the damping control assembly 5, the tension and pressure detection assembly 6, the time delay device, the counter and the detected electric actuator are all electrically connected with the controller. The time delay device is preferably a time relay, the torsion detection component 3 is preferably a static torsion sensor fixedly arranged relative to the frame 1, and the pull pressure detection component 6 is preferably a pull pressure sensor fixedly arranged relative to the frame 1. The staff firstly loads the tested electric actuator on the loading assembly 2 to ensure that the movable piece 2a of the loading assembly 2 is connected with the transmission nut which is used as the output end of the tested electric actuator. The staff sends the signal to the electric executor of being surveyed through the controller, and the electric executor of being surveyed receives its inside drive nut of internal motor drive rotation behind the signal, drives moving part 2a then and takes place the motion along the axial of being surveyed electric executor. The reaction force generated by the force applied by the transmission nut to the moving part 2a is transmitted to the torsion detection component 3 through the shell of the tested electric actuator, and the torsion detection component 3 detects the torsion generated by the transmission nut and sends a signal to the controller, namely the first function test content.
The damping control unit 5 applies damping of the axial movement to the movable element 2a as a necessary condition for the second, third, and fourth functional tests.
The controller sends a signal to the damping control component 5, and the damping control component 5 adjusts the damping applied to the moving part 2a to a preset value after receiving the signal so as to match the test. The controller sends a signal to the speed detection component 4, and the speed detection component 4 indirectly judges whether the rotating speed of the tested electric actuator meets the standard or not by detecting the moving speed of the moving part 2a along the axial direction after receiving the signal under the condition of bearing the damping applied by the damping control component 5, namely the second function test content.
The pull pressure detection component 6 detects the pull pressure generated by the moving part 2a moving along the axial direction under the condition of bearing the damping applied by the damping control component 5, and sends a signal to the controller, namely the third function test content.
The fourth functional test:
the speed detection component 4 divides the up-down moving stroke of the moving piece 2a into a first interval at the central position and a second interval at the two ends. The speed detection component 4 sends a signal to the controller according to the position of the moving element 2a so as to judge the interval of the moving element 2 a. The controller adjusts the damping applied to the moving piece 2a by the pull pressure detection component 6 according to the difference of the interval positions where the moving piece 2a is located: in the first interval, the tension and pressure detection assembly 6 works under non-full load to provide a smaller damping effect; in the second interval, the tension and pressure detection assembly 6 works at full load to provide a large damping effect.
When the speed detection component 4 detects that the moving piece 2a moves upwards or downwards to the stroke end, the controller closes the detected electric actuator; the controller sends a signal to the delay device, the delay device delays the signal according to a preset value after receiving the signal, and after the delay is finished, the controller sends a signal to the tested electric actuator so as to control the moving part 2a to move reversely.
The movable piece 2a reciprocates up and down one time to be recorded as one time, and the counter counts and sends a signal to the controller.
Presetting the running times of the tested electric actuator, starting the speed detection assembly 4, and detecting whether the moving speed of the moving part 2a meets the standard or not by the speed detection assembly 4 under the condition that the moving speed belongs to the fourth function test range, so that the working condition of the tested electric actuator is indirectly reflected, namely the content of the fourth function test.
Further:
in order to solve the technical problem of how to connect with the tested electric actuator, as shown in fig. 3 and fig. 6, the following technical solutions are provided:
moving part 2a is the lead screw of seting up the spout along the axis direction on the perisporium, and the lead screw links with the drive nut screw thread of being surveyed electric actuator, and loading assembly 2 is still including:
one end of the bearing frame 2b is fixedly connected with the damping control component 5, the other end of the bearing frame 2b is fixedly connected with the tested electric actuator, and the bearing frame 2b is used for supporting the tested electric actuator;
the guide flat key 2c, the guide flat key 2c has at least one, and the guide flat key 2c is fixed mounting in frame 1, and the guide flat key 2c and the spout sliding fit on the moving part 2a perisporium.
Specifically, when an internal motor of the tested electric actuator rotates, a transmission nut inside the tested electric actuator rotates at a high speed, and the guide flat key 2c cannot rotate along with the transmission nut due to the matching of the sliding grooves in the peripheral wall of the screw rod, so that the driving force in the axis direction is generated, and the screw rod is controlled to move only in the axis direction. Therefore, the moving piece 2a becomes a target object for various function tests, and indirectly reflects various performances of the tested electric actuator.
Further:
in order to solve the technical problem of how to detect the moving speed of the moving element 2a, as shown in fig. 7, the following technical solutions are provided:
the speed detection assembly 4 comprises:
a detection rod 4a, wherein the detection rod 4a is fixedly arranged relative to the movable element 2 a;
stay cord displacement sensor 4b, stay cord displacement sensor 4b set up in frame 1, and the output of stay cord displacement sensor 4b is connected with the one end of detection lever 4a, and stay cord displacement sensor 4b is used for detecting the velocity of motion of moving part 2a through detection lever 4a is indirect.
Specifically, the rope displacement sensor 4b is electrically connected to the controller. The movable piece 2a drives the detection rod 4a which is fixed relative to the movable piece 2a to move synchronously when moving axially under the driving of the tested electric actuator, and the detection rod 4a is directly or indirectly fixed with the movable piece 2 a. The detection rod 4a applies acting force to the working end of the stay cord displacement sensor 4b, so that the linear displacement of the moving part 2a is detected, and the linear displacement can be used as key data of a second functional test and a fourth functional test, namely a speed performance test and a service life performance test of the tested electric actuator. The working time of the tested electric actuator is set by the controller, and the linear displacement speed of the movable piece 2a can be easily obtained by combining the displacement detected by the stay cord displacement sensor 4b, so that the rotating speed of the transmission nut of the tested electric actuator is indirectly reflected. In addition, the stay cord displacement sensor 4b plays a role in speed detection in the fourth functional test, namely, the life performance test, and can also realize interval division of the movement of the life performance test through the stay cord displacement sensor 4b so as to adjust the damping applied to the damping control component 5 by matching with a controller.
Further:
in order to solve the technical problem of how to prevent detection failure caused by the fault of the pull rope displacement sensor 4b in the test process, as shown in fig. 7 and 8, the following technical solutions are provided:
the speed detection component 4 further comprises a separation blade 4e arranged at the other end of the detection rod 4a, an upper proximity switch 4c and a lower proximity switch 4d which are fixed on the rack 1 in a linear distribution mode along the vertical direction, and the separation blade 4e can trigger the upper proximity switch 4c and the lower proximity switch 4d along with the moving process of the moving piece 2 a.
Specifically, the upper proximity switch 4c and the lower proximity switch 4d are both electrically connected to the controller, and the upper proximity switch 4c and the lower proximity switch 4d indirectly detect the position of the movable element 2a by being triggered by the blocking piece 4 e. Through addding proximity switch 4c and proximity switch 4d down to the separation blade 4e that sets up with the measuring pole 4a other end detects moving part 2 a's displacement as detecting the subject, combines the last proximity switch 4c that sets up in advance, distance between the proximity switch 4d down, can independently realize the second item functional test to the electric actuator of being surveyed, the detection of speed performance promptly, as stay cord displacement sensor 4 b's standby scheme, then improve the stability of work.
Further:
in order to solve the technical problem of how to realize damping adjustment through the damping control assembly 5, as shown in fig. 5 and 9, the following technical solutions are provided:
the damping control assembly 5 includes:
the oil cylinder 5a is fixedly connected with the rack 1, the output end of the oil cylinder 5a is fixedly connected with the end part of the movable piece 2a, the output shaft of the oil cylinder 5a is collinear with the axis of the movable piece 2a, and the oil cylinder 5a is used for applying damping opposite to the movement direction of the movable piece 2a to the movable piece 2 a;
an oil tank 5 b;
a pair of oil paths 5c are arranged on the oil paths 5c, two ends of each oil path 5c are respectively communicated with the oil cylinder 5a and the oil tank 5b, and a first branch 5c1 and a second branch 5c2 which are mutually connected in parallel are arranged between main lines of the oil paths 5c communicated to the oil cylinder 5a and the oil tank 5 b;
a pair of solenoid valves 5d, the solenoid valves 5d being respectively disposed on the first branches 5c1 of the pair of oil passages 5c, the solenoid valves 5d controlling the opening and closing of the first branches 5c 1;
and a flow regulating valve 5e, the flow regulating valve 5e being provided in a pair and respectively provided on the second branches 5c2 of the pair of oil passages 5c, the flow regulating valve 5e being configured to regulate the opening degree of the second branch 5c 2.
Specifically, the electromagnetic valve 5d and the flow regulating valve 5e are both electrically connected with the controller. The pair of oil paths 5c communicated with the oil cylinder 5a respectively and alternately play the oil inlet and outlet effects on the oil cylinder 5a through the matching with the oil tank 5b, and compared with the common oil cylinder control structure with an oil pump, the difference point is only directly provided by the movement of the movable element 2a with the driving force. When the movable piece 2a moves, the output shaft of the oil cylinder 5a is driven to move, and then the oil flows in and out alternately in the pair of oil passages 5 c. When the controller opens the pair of electromagnetic valves 5d, the oil can flow with the minimum resistance through the main circuit and the first branch circuit 5c1, so that the damping applied to the moving part 2a by the output end of the oil cylinder 5a is minimum, and the test condition of the first interval in the fourth function test is met; when the displacement of the movable element 2a falls within the second interval in the fourth function test, the controller closes the electromagnetic valve 5d on the oil outlet state in the pair of oil passages 5c, and the oil flowing out of the oil cylinder 5a can only flow through the second branch passage 5c2 and is controlled by the flow regulating valve 5 e. The controller sends a signal to the flow regulating valve 5e to regulate the opening of the flow regulating valve 5e so that the flow rate of the oil is smaller than the normal flow rate of the oil in the first branch passage 5c1, thereby achieving the effect of full load.
Further:
in order to solve the technical problem of how to coaxially connect the output shaft of the oil cylinder 5a with the movable element 2a, as shown in fig. 4 and 5, the following technical solutions are provided:
the joint of the oil cylinder 5a and the movable piece 2a is connected through a conversion joint 5 f.
Specifically, the influence caused by the difference between the shaft diameter of the output shaft of the oil cylinder 5a and the shaft diameter of the movable piece 2a can be eliminated by arranging the conversion joint 5f, and the device is convenient to install and stable in structure.
Further:
in order to solve the technical problem of improving the maintenance convenience of the damping control assembly 5, as shown in fig. 9, the following technical solutions are provided:
the main line of the oil path 5c and the first branch line 5c1 are provided with ball valves 5g which can be manually adjusted to open and close.
Specifically, the ball valve 5g is arranged to play a role in cutting off the flow when the damping control assembly 5 needs to be maintained, so that the convenience of maintenance of the equipment is improved.
Further:
in order to solve the technical problem of ensuring the working safety of the oil cylinder 5a, as shown in a figure X, the following technical scheme is provided:
at least one internal pressure control assembly 5h is provided on the oil passage 5 c.
Specifically, the internal pressure control assembly 5h is a pressure control valve. The oil cylinder 5a has the maximum safety pressure, and the safety of the oil cylinder 5a is ensured by arranging the oil cylinder 5a to adjust the internal pressure of the oil cylinder 5a caused by exceeding or approaching the limit pressure.
Further:
in order to solve the technical problem of how to realize the supporting function of the rack 1, as shown in fig. 10, the following technical solutions are provided:
Specifically, the tester can be moved by a pulley on the bottom of the movable stage 1 a.
By passing
Further:
in order to solve the technical problem of how to facilitate the installation and the disassembly of the rack 1, as shown in fig. 10, the following technical solutions are provided:
the movable rack 1a, the primary support 1b and the secondary support 1c are connected with each other through flanges.
Specifically, the rack 1 can be conveniently disassembled and installed through flange connection, so that the labor cost is further reduced.
The working principle of the invention is as follows:
step one, preparing in advance: the staff firstly loads the tested electric actuator on the loading assembly 2 to ensure that the movable piece 2a of the loading assembly 2 is connected with the transmission nut which is used as the output end of the tested electric actuator. The damping control unit 5 applies damping of the axial movement to the movable element 2a as a necessary condition for the second, third, and fourth functional tests.
Step two, multifunctional testing:
a first function test:
the staff sends the signal to the electric executor of being surveyed through the controller, and the electric executor of being surveyed receives its inside drive nut of internal motor drive rotation behind the signal, drives moving part 2a then and takes place the motion along the axial of being surveyed electric executor. The reaction force generated by the force applied by the transmission nut to the moving part 2a is transmitted to the torsion detection component 3 through the shell of the tested electric actuator, and the torsion detection component 3 detects the torsion generated by the transmission nut and sends a signal to the controller.
And (3) second function test:
the controller sends a signal to the damping control component 5, and the damping control component 5 adjusts the damping applied to the moving part 2a to a preset value after receiving the signal so as to match the test. The controller sends a signal to the speed detection assembly 4, and the speed detection assembly 4 indirectly judges whether the rotating speed of the detected electric actuator meets the standard or not under the condition of bearing the damping applied by the damping control assembly 5 by detecting the speed of the movement of the moving piece 2a along the axis direction after receiving the signal.
And (3) third function test: the pulling pressure detecting component 6 detects the pulling pressure generated by the axial movement of the movable piece 2a under the condition of bearing the damping applied by the damping control component 5, and sends a signal to the controller.
The fourth functional test:
the speed detection component 4 divides the up-down moving stroke of the moving piece 2a into a first interval at the central position and a second interval at the two ends. The speed detection component 4 sends a signal to the controller according to the position of the moving element 2a so as to judge the interval of the moving element 2 a. The controller adjusts the damping applied to the moving piece 2a by the pull pressure detection component 6 according to the difference of the interval positions where the moving piece 2a is located: in the first interval, the tension and pressure detection assembly 6 works under non-full load to provide a smaller damping effect; in the second interval, the tension and pressure detection assembly 6 works at full load to provide a large damping effect.
When the speed detection component 4 detects that the moving piece 2a moves upwards or downwards to the stroke end, the controller closes the detected electric actuator; the controller sends a signal to the delay device, the delay device delays the signal according to a preset value after receiving the signal, and after the delay is finished, the controller sends a signal to the tested electric actuator so as to control the moving part 2a to move reversely.
The movable piece 2a reciprocates up and down one time to be recorded as one time, and the counter counts and sends a signal to the controller.
Presetting the running times of the tested electric actuator, starting the speed detection assembly 4, and detecting whether the moving speed of the moving part 2a meets the standard or not by the speed detection assembly 4 under the condition that the moving speed belongs to the fourth function test range, so that the working condition of the tested electric actuator is indirectly reflected, namely the content of the fourth function test.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. The utility model provides an electric actuator multifunctional testing machine for carry out functional test to electric actuator, includes frame (1), is used for loading the loading subassembly (2) of being surveyed electric actuator, and is used for testing the detection module of being surveyed electric actuator performance, its characterized in that:
the loading assembly (2) comprises a moving piece (2a) which is connected with the output end of the tested electric actuator and only moves along the axial direction of the tested electric actuator, and the detection module comprises a torsion detection assembly (3), a speed detection assembly (4), a damping control assembly (5), a pull pressure detection assembly (6), a time delay device and a counter; the end part of the moving part (2a) is coaxially and fixedly connected with the output end of the damping control component (5), the torsion detection component (3), the speed detection component (4) and the damping control component (5) are fixedly arranged relative to the rack (1), and the tension pressure detection component (6) is arranged at the connection part of the moving part (2a) and the damping control component (5);
wherein the content of the first and second substances,
the torsion detection assembly (3) is used for realizing a first function test, namely testing the torsion performance of the tested electric actuator;
the speed detection component (4) is matched with the damping control component (5) to realize a second function test, namely the speed performance of the tested electric actuator is tested;
the pull pressure detection assembly (6) is matched with the damping control assembly (5) to realize a third function test, namely the pull pressure performance of the tested electric actuator is tested;
the damping control assembly (5), the pull pressure detection assembly (6), the delay device and the counter are matched to realize a fourth function test, namely the service life performance of the tested electric actuator is tested.
2. The multifunctional testing machine for the electric actuators as claimed in claim 1, wherein the movable member (2a) is a screw rod with a sliding groove along the axial direction on the peripheral wall, the screw rod is in threaded connection with a transmission nut of the tested electric actuator, and the loading assembly (2) further comprises:
one end of the bearing frame (2b) is fixedly connected with the damping control assembly (5), the other end of the bearing frame (2b) is fixedly connected with the tested electric actuator, and the bearing frame (2b) is used for bearing the tested electric actuator;
the guide flat key (2c), the guide flat key (2c) has at least one, and the guide flat key (2c) fixed mounting is in frame (1), and guide flat key (2c) and the spout sliding fit on the perisporium of moving part (2 a).
3. The multifunctional testing machine for electric actuators as claimed in claim 1, wherein the speed detecting assembly (4) comprises:
the detection rod (4a), the detection rod (4a) is fixedly arranged relative to the moving piece (2 a);
stay cord displacement sensor (4b), stay cord displacement sensor (4b) set up in frame (1), and the output of stay cord displacement sensor (4b) is connected with the one end of measuring bar (4a), and stay cord displacement sensor (4b) are used for detecting the velocity of motion of moving part (2a) through measuring bar (4a) indirect.
4. The multifunctional testing machine for the electric actuators as claimed in claim 3, wherein the speed detection assembly (4) further comprises a blocking piece (4e) installed at the other end of the detection rod (4a), and an upper proximity switch (4c) and a lower proximity switch (4d) which are fixed on the machine frame (1) in a straight line distribution along the vertical direction, and the blocking piece (4e) can trigger the upper proximity switch (4c) and the lower proximity switch (4d) in the process of moving along with the moving piece (2 a).
5. The multifunctional testing machine for electric actuators as claimed in claim 1, wherein the damping control assembly (5) comprises:
the oil cylinder (5a), the oil cylinder (5a) is fixedly connected with the frame (1), the output end of the oil cylinder (5a) is fixedly connected with the end part of the movable piece (2a), the output shaft of the oil cylinder (5a) is collinear with the axis of the movable piece (2a), and the oil cylinder (5a) is used for applying damping opposite to the movement direction of the movable piece (2a) to the movable piece (2 a);
a fuel tank (5 b);
the oil passages (5c) are provided with a pair of oil passages (5c), two ends of each oil passage (5c) are respectively communicated with the oil cylinder (5a) and the oil tank (5b), and a first branch (5c1) and a second branch (5c2) which are mutually connected in parallel are arranged between main lines of the oil passages (5c) communicated to the oil cylinder (5a) and the oil tank (5 b);
the electromagnetic valves (5d), the electromagnetic valves (5d) are provided with a pair and are respectively arranged on the first branches (5c1) of the pair of oil passages (5c), and the electromagnetic valves (5d) are used for controlling the opening and closing of the first branches (5c 1);
the flow regulating valve (5e), the flow regulating valve (5e) is provided with a pair and is respectively arranged on the second branch (5c2) of the pair of oil passages (5c), and the flow regulating valve (5e) is used for regulating the opening degree of the second branch (5c 2).
6. The multifunctional testing machine for the electric actuators as claimed in claim 5, wherein the connection between the oil cylinder (5a) and the movable member (2a) is connected by a conversion joint (5 f).
7. The multifunctional testing machine for the electric actuators as claimed in claim 5, wherein the main line and the first branch line (5c1) of the oil path (5c) are provided with ball valves (5g) which can be manually adjusted to open and close.
8. The multifunctional testing machine for electric actuators as claimed in claim 5, wherein at least one internal pressure control assembly (5h) is provided on the oil path (5 c).
9. The multifunctional testing machine for electric actuators as claimed in claim 1, wherein the machine frame (1) comprises a movable rack (1a) disposed at the bottom for providing a moving function, a primary support (1b) fixedly mounted at the upper end of the movable rack (1a), and second grade support (1c) of fixed mounting in one-level support (1b) upper end, one-level support (1b), second grade support (1c) all with surveyed electric actuator axis collineation setting, second grade support (1c) upper end is equipped with the recess that supplies torsion detection subassembly (3) to install, portable rack (1a) bottom is equipped with the gyro wheel, portable rack (1a) and damping control subassembly (5) fixed connection, speed detection subassembly (4) are fixed on one-level support (1b), second grade support (1c) are the hollow structure that can supply moving part (2a) to pass.
10. The multifunctional testing machine for electric actuators as claimed in claim 9, wherein the movable stage (1a), the primary support (1b) and the secondary support (1c) are flanged with each other.
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| CN113237645B (en) | 2022-11-18 |
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