CN102519716A - Test stand for performance of linear electromechanical actuator - Google Patents
Test stand for performance of linear electromechanical actuator Download PDFInfo
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- CN102519716A CN102519716A CN2011103969827A CN201110396982A CN102519716A CN 102519716 A CN102519716 A CN 102519716A CN 2011103969827 A CN2011103969827 A CN 2011103969827A CN 201110396982 A CN201110396982 A CN 201110396982A CN 102519716 A CN102519716 A CN 102519716A
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Abstract
The invention discloses a test stand for performance of a linear electromechanical actuator, which comprises a base plate, a pulley assembly, a guide rail assembly, a pull pressure sensor assembly, a loading weight, the linear electromechanical actuator and a displacement sensor assembly. When performance indexes of the linear electromechanical actuator are measured, the loading weight is hung for loading to control motion parameters of the linear electromechanical actuator, dynamic load of the linear electromechanical actuator is measured through the pull pressure sensor assembly, and parameters including output speed, output accelerated speed and the like are measured through the displacement sensor assembly, so that performance parameters of the linear electromechanical actuator are obtained. When the linear electromechanical actuator is controlled to be in a remaining state, static load of the linear electromechanical actuator is measured by increasing weight of the weight gradually. Under the condition without hanging the loading weight, namely no load, the performance parameters including stroke, maximum speed, response time and the like are measured through the displacement sensor assembly. The test stand for the performance of the linear electromechanical actuator has the advantages of being high in measurement accuracy, wide in test range, free of pollution, simple and convenient in operation and the like.
Description
Affiliated field
The present invention relates to a kind of mechanical hook-up that is used for straight line electromechanical actuator performance test.
Prior art
The straight line electromechanical actuator with its precision is high, frequency response is fast, volume is little, in light weight, viability is strong, advantage such as pollution-free and easy to maintenance just progressively replaces traditional hydraulic actuator, and is widely used in all trades and professions such as flight control system, precision machine tool, packaging for foodstuff.The straight line electromechanical actuator mainly is made up of motor, reducing gear, ball-screw (or roller screw) and electric-control system four parts, through the rotation of leading screw and the planetary motion of rolling body, gives nut to realize straight line output transmission of power.The straight line start performance of straight line electromechanical actuator directly has influence on control accuracy, speed and the efficient etc. of start object, so need make a service test to actuator.
In the prior art; The correlated performance testing table mainly concentrates on to be tested the running part of actuating system; Promptly the performance of ball-screw is tested; In document " analysis and test of precise ball screw pair moment of friction fluctuation " and " high speed ball screw assembly, dynamic performance is analyzed and experimental study "; Respectively the moment of friction and the comprehensive dynamic performance of ball-screw are tested and studied, this type testing table is not taken into account the performance of motor and speed reducer structure, can't embody the overall performance index of measuring linear actuator.And to the performance test of whole actuating system, domestic rare testing table adopts the charger of hydraulic system as actuator mostly, the structure relative complex, and exist hydraulic power source to be prone to pollute, to safeguard problems such as inconvenience and area occupied are big.The external existing overall performance testing table that adopts electromechanical actuator as charger; Like document " Experimental and Analytical Development of Health Management for Electro-Mechanical Actuators "; But this testing table cost is higher; Need design the control system of charger simultaneously, increase the complicacy of testing table design, processing and operation.
Summary of the invention
The objective of the invention is: adopt hydraulic system as charger in order to overcome existing straight line electromechanical actuator performance test stand more; There are easy pollution, difficult maintenance, take up an area of problems such as big; Do not take all factors into consideration the performance of motor and speed reducer structure simultaneously; Can't test many deficiencies such as overall performance index of actuating system, a kind of measuring accuracy height, test specification straight line electromechanical actuator performance test stand wide, pollution-free, easy and simple to handle are provided.
Technical scheme of the present invention is that a kind of straight line electromechanical actuator performance test stand comprises base plate, pulley assembly, guide assembly, pull pressure sensor assembly, load counterweight, straight line electromechanical actuator and displacement sensor component.
Base plate provides support for other each parts;
There is internal thread on the take-off lever top that is fixed on the straight line electromechanical actuator on the base plate, and this internal thread forms with connecting link one end and is threaded; Said connecting link direction is consistent with the start direction of straight line electromechanical actuator;
Said guide assembly is made up of slide rail and slide block, and slide rail is fixedly mounted on the base plate, and the slide rail direction is parallel with the start direction of straight line electromechanical actuator;
Said pull pressure sensor assembly mainly comprises mount pad, front end back shaft, pull pressure sensor and rear end back shaft; The cavity structure that four limit walls of said mount pad form, its diapire is connected on the slide block of guide assembly; Through the cylindrical hole of the front-end and back-end wall of mount pad, the two ends of described pull pressure sensor are connected in a front end back shaft and a rear end back shaft end in opposite directions respectively respectively for front end back shaft and rear end back shaft; And the front end back shaft is fixed on the mount pad, and the other end of rear end back shaft and the aforesaid connecting link other end are connected;
Said displacement sensor component mainly comprises displacement transducer, elasticity erecting frame and L shaped brace, and displacement transducer is installed on the base through the elasticity erecting frame, and the sounding rod of displacement transducer is connected with the L shaped brace that is connected on the mount pad;
Said pulley assembly is made up of pulley bracket, pulley and pivot pin; Four groups of pulley assemblies are fixed on the base plate, and its distributing position is about the start direction symmetry of straight line electromechanical actuator;
Said load counterweight is identical two groups, is connected on the mount pad of pull pressure sensor assembly through two pulleys by two groups of cords respectively; The direction of section cord is parallel with the start direction of straight line electromechanical actuator between pulley and the tie point.
When measuring straight line electromechanical actuator performance index; Load through carry load counterweight; The kinematic parameter of control straight line electromechanical actuator; Can measure the dynamic loading of straight line electromechanical actuator by the pull pressure sensor assembly, can measure parameters such as output speed and output acceleration by displacement sensor component, thereby obtain the performance parameter of straight line electromechanical actuator; Be under the state of maintenance at control straight line electromechanical actuator,, can measure the static load of straight line electromechanical actuator through increasing the weight of counterweight gradually; At carry load counterweight not is under the idle condition, can be measured the performance parameter such as stroke, maximal rate, response time of straight line electromechanical actuator by displacement sensor component.
The invention has the beneficial effects as follows: the straight line electromechanical actuator performance test stand of design can apply the constant axial pressure of different sizes to linear actuator, thereby can simulate different loads.This straight line electromechanical actuator testing table can be measured performance parameters such as the quiet dynamic loading, actuating travel, start speed, start acceleration, response time of linear actuator.Have advantages such as measuring accuracy height, test specification be wide, pollution-free, easy and simple to handle.
Accompanying drawing and description of drawings
Fig. 1 is the straight line electromechanical actuator performance test stand axis of no-feathering mapping that the present invention proposes;
Fig. 2 is the straight line electromechanical actuator performance test stand structure vertical view that the present invention proposes;
Fig. 3 is the base framework axonometric drawing;
Fig. 4 is the pedestal axonometric drawing;
Fig. 5 is pull pressure sensor assembly and slide block cut-open view;
Fig. 6 is the mount pad axonometric drawing;
Fig. 7 is a rear end back shaft axonometric drawing;
Fig. 8 is the pitman shaft mapping;
Wherein: 1. base framework; 2. control system placing plate; 3. shell; 4. cabinet door; 5. base plate; 6. pulley bracket; 7. pulley; 8. pivot pin; 9. slide rail; 10. slide block; 11. back-up block; 12. mount pad; 13. front end back shaft; 14. nut; 15. pull pressure sensor; 16. rear end back shaft; 17. gland; 18. capping; 19. hook; 20. cord; 21. load counterweight; 22. connecting link; 23. bearing pin; 24. pin; 25.L-U shape support; 26. straight line electromechanical actuator; 27. displacement transducer; 28. elasticity erecting frame; 29.L shape brace
The practical implementation instance
Embodiment 1:
Consult Fig. 1 Fig. 2, the straight line electromechanical actuator performance test stand in the present embodiment comprises pedestal, base plate 5, pulley assembly, guide assembly, supporting component, pull pressure sensor assembly, counterweight assembly, bearing pin coupling assembling, L-U shape support 25, straight line electromechanical actuator 26 and displacement sensor component.Pedestal is used for supporting the whole test platform, and enough height space is provided for the motion of load counterweight 21; Base plate 5 is installed in pedestal upper surface through bolt; Pulley assembly is fixedly mounted on the two ends of base plate; Load counterweight 21 links to each other with the pull pressure sensor assembly through cord 20 and hangs on the pulley assembly in the process of the test; Guide rail is made up of slide rail 9 and slide block 10, and slide rail 9 is installed through bolt with base plate 5, and slide block 10 is connected through bolt with the pull pressure sensor assembly; Supporting component is installed on the base plate 5 through bolt, is installed in the both sides of slide rail 9 respectively; L-U type support 25 is installed on the base plate 5 through bolt, along base plate 5 length directions, and L-U type support 25 symmetrical planes and guide rail 9 symmetrical plane coplanes; Straight line electromechanical actuator 26 is installed on the L-U type support 25 through bolt, and links to each other with the pull pressure sensor assembly through bearing pin; Displacement sensor component and straight line electromechanical actuator 26 are installed in parallel on the base plate 5, and the sounding rod that stretches out links up with the pull pressure sensor assembly through using L type brace 29.
Consult Fig. 3, Fig. 4, pedestal comprises base framework 1, control system placing plate 2, shell 3 and cabinet door 4.Base framework 1 is three layers a quadra structure, is respectively 2 layers of control system placing plate mounting rail and base mounting rail from bottom to top, is connected through welding technology between each beam of base framework 1.Have the hole on the control system placing plate mounting rail, be used for fixing installation and control system placing plate 2; Be distributed with 16 holes on the base mounting rail, be used for being connected with base plate 5 through bolt.Control system placing plate 2 is a block length square plate, and three through holes that distribute above are used for being fixedly connected with control system placing plate mounting rail.Shell 3 is the thin plate of a U-shaped, is fixed together through welding and base framework 1, is distributed with four circular holes on one side sidewall of shell 3, thereby the circuit of control system is passed through smoothly, is connected with straight line electromechanical actuator 26.Cabinet door 4 links through hinge and shell 3, thereby can control its folding, the convenient control system of placing, thus save the testing table space.
Base plate 5 is a rectangular steel plate, is distributed with 38 of threaded hole and the through holes of a series of different-diameter on the plate, is used for each assembly of installation test platform.These mounting holes mainly contain pedestal mounting hole, pulley assembly mounting hole, guide rail mounting hole, supporting component mounting hole, L-U type support mounting hole and displacement sensor component mounting hole.Wherein the pedestal mounting hole is a through hole, is used for realizing being connected with pedestal, and other are threaded hole, is used for installation test platform part and instrument.
Pulley assembly mainly is made up of three parts, is respectively pulley bracket 6, pulley 7 and pivot pin 8, and pulley 7 is installed in pulley bracket 6 tops through pivot pin 8.Two through holes are arranged at the pulley assembly bottom, are installed on the base plate 5 through bolt.
Guide assembly is made up of slide rail 9 and slide block 10, and wherein respectively there is a dormant bolt mounting hole at slide rail 9 two ends, fixedly mounts through dormant bolt with base plate 5; Wherein slide block 10 has two, respectively is distributed with 4 threaded holes, is connected through bolt with the pull pressure sensor assembly.
Back-up block 11 has two for the cross section is rectangular steel bar, is symmetrically distributed to be installed in the both sides of guide rail 9, and height is a little less than the setting height(from bottom) of slide block 10, thereby prevents the stressed excessive run-off the straight of pull pressure sensor assembly in the experimental test process.The back-up block 11 two ends dormant bolt mounting hole that respectively distributes is on dormant bolt fixed installation base plate 5.
Consult Fig. 5, the pull pressure sensor assembly mainly is made up of seven parts, is respectively mount pad 12, front end back shaft 13, nut 14, pull pressure sensor 15, rear end back shaft 16, gland 17 and capping 18.Mount pad 12 is the cavity of a rectangle band lug; A cylindrical hole is arranged on the front end wall of rectangular cavity, and two end faces in hole all there are boss, thereby increase front end back shaft 13 suffered holding power areas; Respectively there is a threaded hole in the outside two of this wall, is used for installing hook 19; The rear end wall that cavity is relative cuts out the breach that a middle circle of two ends rectangle combines, and is used for installing rear end back shaft 16, and also respectively there is a threaded hole on the both sides, the outside of this wall, is used for installing hook 19; All there is threaded hole on the top of mount pad 12 for four jiaos, is used for realizing the installation of capping 18; Consult Fig. 6, the bottom of mount pad 12 is distributed with eight holes that are used to install, and wherein four holes are distributed on the lug, and four pore size distributions are used for realizing and the guide assembly connection on cavity floor.Front end back shaft 13 is short multidiameter, and two ends are distributed with screw thread.Front end back shaft 13 is installed in the cylindrical hole of mount pad 12 cavity front ends, and is fixedly mounted on the mount pad 12 through nut 14, and the other end of front end back shaft 13 and pull pressure sensor 15 are through being threaded.Pull pressure sensor 15 is the S type, and threaded hole is all arranged on two end carriages, and the other end of pull pressure sensor 15 is through being threaded and rear end back shaft 16 is connected.Consult Fig. 7, the other end of rear end back shaft 16 is ears sheets, is used for realizing that bearing pin connects, and rear end back shaft 16 is supported by gland 17.Gland 17 body profile are a rectangle thin plate, and there is a cylindrical hole in the centre, and in order to increase Area of bearing, an end face in hole is designed with boss.The manhole that respectively distributes on four angles of gland 17 is used for realizing that the bolt with mount pad 12 is connected, and the bottom of gland 17 has two square breach, thereby can avoid interfering with the erection bolt of mount pad 12.Capping 18 is a square plate, and four jiaos of circular holes that respectively distribute are used for realizing and being connected of mount pad 12 that simultaneously, there is individual circular hole at the center of capping 18, thereby guarantees the supply line of pull pressure sensor 15 and being connected of signal transmission line.
The counterweight assembly mainly is made up of three parts, is respectively hook 19, cord 20 and load counterweight 21.Hook 19 is installed in respectively on the wall side of pull pressure sensor assembly mount pad 12, and cord 20 coupling hooks 19 hang on the pulley assembly with load counterweight 21 and with load counterweight 21.
The bearing pin coupling assembling mainly is made up of three parts, is respectively connecting link 22, bearing pin 23 and sells 24.Consult Fig. 8, connecting link 22 1 ends are the monaural sheet, are connected through bearing pin with the ears sheet of rear end back shaft 16, and the other end is a threaded hole, link to each other with straight line electromechanical actuator 26 take-off levers.
The mounting means of straight line electromechanical actuator 26 is that the two sided bolt installs, and the take-off lever top is distributed with internal thread, can with connecting link 22 through being threaded.
Displacement sensor component mainly is made up of three parts, is respectively displacement transducer 27, elasticity erecting frame 28 and L shaped brace 29.Displacement transducer 27 is installed on the base 5 through elasticity erecting frame 28, and the adjustable positions of displacement transducer 27, thereby can satisfy mounting condition neatly, is distributed with screw thread on the sounding rod of displacement transducer 27.Have on the L shaped brace 29 and can realize the hole that connects; Through the bolt connection L shaped brace 29 is connected with the pull pressure sensor assembly; Be connected with L shaped brace 29 through the sounding rod of nut displacement transducer 27; Thereby can sounding rod and pull pressure sensor assembly be coupled together, realize the accurate measurement of displacement.
Present embodiment is when measuring the dynamic performance index of straight line electromechanical actuator 26; To measure thrust is example; At first apply dynamic load for straight line electromechanical actuator 26 through the counterweight assembly; Mode is that hook 19 is installed on the wall of the rear end of mount pad 12, will specify the load counterweight 21 of load to hang on the pulley assembly through cord 20.
In the measuring process; Through setting the controlled variable of straight line electromechanical actuator 26 control system, comprise displacement and speed etc., straight line electromechanical actuator 26 is with certain thrust output; Measure the thrust output of straight line electromechanical actuator 26 through the pressure assembly; Measure the carry-out bit shifting parameter of straight line electromechanical actuator 26 through displacement transducer 27,, and then obtain its speed and acceleration parameter through data processing.
When measuring straight line electromechanical actuator 26 pulling force and counter motion parameter, the control mode of the mounting means of counterweight assembly and straight line electromechanical actuator 26 is the same opposite.
Embodiment 2:
Present embodiment is in hold mode through control system control straight line electromechanical actuator 26 when measuring the static load of straight line electromechanical actuator 26, increase the weight of load counterweight 21 gradually, can measure its static load through the pull pressure sensor assembly.
Embodiment 3:
Present embodiment when measuring the no-load performance parameter of straight line electromechanical actuator 26, carry counterweight assembly not in the process of the test.In the measuring process; The controlled variable of the control system through setting straight line electromechanical actuator 26; Comprise displacement and actuating speed etc., straight line electromechanical actuator 26 is measured the carry-out bit shifting parameter of straight line electromechanical actuator 26 with the certain speed output movement through displacement transducer 27; Through data processing, and then obtain its speed and acceleration parameter.
When measuring counter motion parameter when unloaded of straight line electromechanical actuator 26, the control mode of straight line electromechanical actuator 26 is the same opposite.
Claims (2)
1. a straight line electromechanical actuator performance test stand is characterized in that: comprise base plate, pulley assembly, guide assembly, pull pressure sensor assembly, load counterweight, straight line electromechanical actuator and displacement sensor component.
Said base plate provides support for other each parts;
There is internal thread on the take-off lever top that is fixed on the straight line electromechanical actuator on the base plate, and this internal thread forms with connecting link one end and is threaded; Said connecting link direction is consistent with the start direction of straight line electromechanical actuator;
Said guide assembly is made up of slide rail and slide block, and slide rail is fixedly mounted on the base plate, and the slide rail direction is parallel with the start direction of straight line electromechanical actuator;
Said pull pressure sensor assembly mainly comprises mount pad, front end back shaft, pull pressure sensor and rear end back shaft; The cavity structure that four limit walls of said mount pad form, its diapire is connected on the slide block of guide assembly; Through the cylindrical hole of the front-end and back-end wall of mount pad, the two ends of described pull pressure sensor are connected in a front end back shaft and a rear end back shaft end in opposite directions respectively respectively for front end back shaft and rear end back shaft; And the front end back shaft is fixed on the mount pad, and the other end of rear end back shaft and the aforesaid connecting link other end are connected;
Said displacement sensor component mainly comprises displacement transducer, elasticity erecting frame and L shaped brace, and displacement transducer is installed on the base through the elasticity erecting frame, and the sounding rod of displacement transducer is connected with the L shaped brace that is connected on the mount pad;
Said pulley assembly is made up of pulley bracket, pulley and pivot pin; Four groups of pulley assemblies are fixed on the base plate, and its distributing position is about the start direction symmetry of straight line electromechanical actuator;
Said load counterweight is identical two groups, is connected on the mount pad of pull pressure sensor assembly through two pulleys by two groups of cords respectively; The direction of section cord is parallel with the start direction of straight line electromechanical actuator between pulley and the tie point.
2. straight line electromechanical actuator performance test stand as claimed in claim 1, it is characterized in that: described pull pressure sensor is a S type pull pressure sensor.
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| CN201110396982.7A CN102519716B (en) | 2011-12-02 | 2011-12-02 | Test stand for performance of linear electromechanical actuator |
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| CN201110396982.7A CN102519716B (en) | 2011-12-02 | 2011-12-02 | Test stand for performance of linear electromechanical actuator |
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