CN110345132A - A kind of servo valve dual input characteristic test system - Google Patents
A kind of servo valve dual input characteristic test system Download PDFInfo
- Publication number
- CN110345132A CN110345132A CN201910645872.6A CN201910645872A CN110345132A CN 110345132 A CN110345132 A CN 110345132A CN 201910645872 A CN201910645872 A CN 201910645872A CN 110345132 A CN110345132 A CN 110345132A
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- servo valve
- actuator
- dual input
- displacement
- tested
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
-
- 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
- G01M13/003—Machine valves
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
A kind of servo valve dual input characteristic test system, including TT&C system and testing stand, tested servo valve is installed on testing stand work top, actuator is installed on testing stand, tested servo valve drive ram in the case where loading signal function generates the displacement proportional to load signal, and feeds back to tested servo valve machine feedback displacement input terminal；TT&C system includes slave computer Digital Logical Circuits and host computer human-computer interaction interface, user passes through host computer human-computer interaction interface input load signal, the load signal is converted to constant-current source by slave computer Digital Logical Circuits, it is applied to tested servo valve electrical input, and acquire the displacement of tested servo valve machine feedback displacement input terminal, it feeds back to host computer human-computer interaction interface to be shown, judges whether servo valve dual input characteristic meets the requirements for user.The present invention can be realized individually to the function of servo valve dual input characteristic test, achieve the purpose that judge dual input characteristic performance.
Description
Technical field
The present invention relates to a kind of servo valve dual input characteristic test systems, belong to technical field of hydraulic.
Background technique
Electrohydraulic servo valve is applied in hydraulic control system, is the core that system carries out position, pressure or velocity close-loop control
Heart control element.Electromechanical dual input servo valve is a seed type of electrohydraulic servo valve, is usually used in space flight, aviation position vector servo
In control system, dual input characteristic includes: the spies such as the stagnant ring of dual input, dual input gain, dual input displacement, dual input symmetry
Property index, directly affects servo-system performance indicator.Dual input characteristic index is in generic servo valve performance debugging test system
It can not individually be tested, servo valve and servo-system is needed to be tested in joint-trial, therefore its index performance superiority and inferiority can not be pre-
Know.
Summary of the invention
Technology of the invention solves the problems, such as: overcoming the deficiencies of the prior art and provide a kind of servo valve dual input characteristic
Test macro is realized individually to the function of servo valve dual input characteristic test, achievees the purpose that judge dual input characteristic performance.
The technical solution of the invention is as follows:
A kind of servo valve dual input characteristic test system, including TT&C system and testing stand；
Tested servo valve is installed on testing stand work top, and actuator is equipped on testing stand, and tested servo valve is adding
It carries drive ram under signal function and generates the displacement proportional to load signal, and feed back to tested servo valve machine feedback position
Move input terminal；
TT&C system includes slave computer Digital Logical Circuits and host computer human-computer interaction interface, and user is man-machine by host computer
The load signal is converted to constant-current source, is applied to tested by interactive interface input load signal, slave computer Digital Logical Circuits
Servo valve electrical input, and the displacement of tested servo valve machine feedback displacement input terminal is acquired, feed back to host computer human-computer interaction
Interface is shown, judges whether servo valve dual input characteristic meets the requirements for user.
Testing stand includes actuator, feedback push rod, shaft position sensor and dual input displacement sensor；
Tested servo valve is installed on testing stand work top, and machine feedback is displaced input terminal by feedback push rod and makees
Actuator piston bar vertically connects, and shaft position sensor is connect by sensor connecting rod with actuator pistons bar, and the axial direction
Displacement sensor is parallel with actuator pistons bar；Dual input displacement sensor is vertically connected on actuator pistons bar, slave computer
Digital Logical Circuits is used to acquire the displacement of dual input displacement sensor；Two of the load cavity connection actuator of tested servo valve
Control chamber.
The actuator includes actuator pistons bar, actuator left end cap, actuator sleeve and actuator right end cap；
Actuator left end cap and actuator right end cap are respectively arranged at left and right sides of actuator sleeve, and actuator pistons bar is worn
Actuator left end cap and actuator right end cap are crossed, and side-to-side movement can be carried out along actuator pistons rod sleeve, the actuator is living
Stopper rod sleeve and actuator left end cap are integrally designed.
The feedback push rod includes the first push rod, the second push rod, feather key, bearing；
First push rod threaded one end is connected to inside the second push rod head end, the machine feedback position of the other end and tested servo valve
Move input terminal connection；Second push rod end is connect by bearing with actuator pistons bar, is provided with keyway on the side wall of the second push rod,
Feather key is provided in keyway, the feather key is fixed on the sleeve lining of actuator pistons bar.
By rotating the first push rod, the initial position for adjusting actuator pistons bar is located at center zero, prevents motion process
In, actuator pistons bar and actuator cylinder body collide.
Actuator pistons bar is cone bar.
The taper of actuator pistons bar=actuator pistons bar stroke/tested servo valve double input end feeds back stroke.
Testing stand further includes installing excessive block, installs excessive block setting oil circuit, and the load cavity of tested servo valve passes through installation
Two control chambers of oil circuit and actuator on excessive block connect；
Tested servo valve and actuator are installed on the excessive block of installation, are installed excessive block and are installed on testing stand work top
On.
Dual input displacement sensor passes through the sleeve connection of sensor sleeve and actuator pistons bar.
Test process is as follows:
Step 1: tested servo valve being installed on testing stand, assembles servo valve dual input characteristic test system；
Step 2: user passes through host computer human-computer interaction interface input load signal；
Step 3: the servo valve output flow proportional to load signal, actuator pistons bar are subjected to displacement, and the displacement is logical
It crosses feedback push rod and feeds back to tested servo valve machine feedback displacement input terminal；
Step 4: the displacement of machine feedback displacement input terminal is input to slave computer number by dual input displacement sensor and patrols
Circuit is collected, slave computer Digital Logical Circuits gives displacement output to host computer human-computer interaction interface, host computer human-computer interaction circle
Face accordingly generates test curve and dual input characteristic index numerical value, and shows, whether judges servo valve dual input characteristic for user
It meets the requirements.
Compared with prior art, the invention has the following beneficial effects:
(1) present invention devises the actuator pistons bar with tapered configuration, and by reasonable cone angle design, realizes
Actuator is axially moved the displacement input that displacement is converted to the servo valve mechanical input in perpendicular direction.
(2) present invention devises the feedback push rod with keyway and bearing arrangement, acts on actuator by bearing roller
On piston rod, the purpose for reducing frictional force when displacement inputs servo valve, not rolling is realized.
(3) present invention devises vertical, horizontal dibit displacement sensor frame mode, can not only realize that servo valve machinery is defeated
Enter the displacement acquisition function at end, while in the case where on-mechanical is displaced and inputs, realizing actuator using electric position closed-loop system
Position zero offset capability of the piston rod inside cylinder barrel.
(4) present invention devises recovery spring on tested servo valve, when between feedback push rod and servo valve mandril due to rubbing
When wiping is worn, abrading section self-compensating function can be realized by restoring spring.
(5) present invention can be realized by displacement curve to the specified command displacement of dual input characteristic servo valve, dual input increasing
The test of the indexs such as benefit, the dual input linearity, dual input symmetry, the stagnant ring of dual input, covers all dual input characteristic projects
Test.
(6) dual input displacement measurement curve of the present invention can real-time rendering in testing, and realize test curve and drawn
The automatic calculating and real-time display function of indices after finishing.
Detailed description of the invention
Fig. 1 is servo valve dual input characteristic test system outside drawing；
Fig. 2 is servo valve dual input characteristic test system main view；
Fig. 3 is servo valve dual input characteristic test system top view；
Fig. 4 is servo valve dual input characteristic test system schematic perspective view；
Fig. 5 is tapered piston rod structure schematic diagram；
Fig. 6 is the feedback push rod of keyway and bearing arrangement；
Fig. 7 is host computer human-computer interaction interface figure.
Specific embodiment
As shown in Figure 1, the invention proposes a kind of servo valve dual input characteristic test system, including TT&C system and examination
Test platform.Tested servo valve is installed on testing stand work top, and actuator is equipped on testing stand, is tested servo valve and is believed in load
Number acting on lower drive ram generates the displacement proportional with load signal, and feeds back to tested 8 machine feedback of servo valve and be displaced
Input terminal.
TT&C system includes slave computer Digital Logical Circuits and host computer human-computer interaction interface, and user is man-machine by host computer
The load signal is carried out digital-to-analogue conversion and enhanced processing by interactive interface input load signal, slave computer Digital Logical Circuits,
Constant-current source is obtained, tested servo valve electrical input is applied to, and acquires the position of tested 8 machine feedback of servo valve displacement input terminal
It moves, feeds back to host computer human-computer interaction interface and shown, judge whether servo valve dual input characteristic meets the requirements for user.
Specifically, as shown in Fig. 2, testing stand includes actuator, feedback push rod 9, shaft position sensor 11, dual input position
Displacement sensor 1 and the excessive block of installation, tested servo valve are installed on testing stand work top, and it is logical that machine feedback is displaced input terminal
Cross that feedback push rod 9 is vertical with actuator pistons bar 3 to be connect, shaft position sensor 11 is living by sensor connecting rod 10 and actuator
Stopper rod 3 connects, and the shaft position sensor 11 is parallel with actuator pistons bar 3；Dual input displacement sensor 1 vertically connects
In on actuator pistons bar 3, slave computer Digital Logical Circuits is used to acquire the displacement of dual input displacement sensor；Tested servo valve
Load cavity connection actuator two control chambers.Excessive block 7 is installed, oil circuit is set, the load cavity of tested servo valve 8 passes through peace
Two control chambers for filling the oil circuit on excessive block 7 and actuator connect.It is excessive that tested servo valve 8 and actuator are installed on installation
On block 7, excessive block 7 is installed and is installed on testing stand work top.
Actuator includes actuator pistons bar 3, actuator left end cap 4, actuator sleeve 5 and actuator right end cap 6.Actuation
Device left end cap 4 and actuator right end cap 6 are respectively arranged in 5 left and right sides of actuator sleeve, and actuator pistons bar 3 passes through actuator
Left end cap 4 and actuator right end cap 6, and side-to-side movement, 3 sleeve of actuator pistons bar can be carried out along 3 sleeve of actuator pistons bar
It is integrally designed with actuator left end cap 4.Fig. 3 is top view.Fig. 4 show servo valve dual input characteristic test system solid knot
Structure schematic diagram.
As shown in fig. 6, feedback push rod 9 includes the first push rod 91, the second push rod 92, feather key 17, bearing 18.First push rod
91 threaded one ends are connected to inside 92 head end of the second push rod, and the machine feedback displacement input terminal of the other end and tested servo valve 8 connects
It connects；Second push rod, 92 end is connect by bearing 18 with actuator pistons bar 3, is provided with keyway, key on the side wall of the second push rod 92
Feather key 17 is provided in slot, the feather key 17 is fixed on the sleeve lining of actuator pistons bar 3.By rotating the first push rod
91, the initial position for adjusting actuator pistons bar 3 is located at center zero, prevents in motion process, actuator pistons bar 3 and actuation
The collision of device cylinder body.
As shown in figure 5, actuator pistons bar 3 is cone bar.Taper=actuator pistons bar 3 stroke/tested servo valve 8 pairs
Input terminal feeds back stroke.Fig. 5 is the enlarged drawing of I in Fig. 2.
As shown in Fig. 2, dual input displacement sensor 1 passes through the sleeve connection of sensor sleeve 2 and actuator pistons bar 3.
Fig. 7 is host computer human-computer interaction interface figure.
Slave computer digital logic circuit design amplifying circuit, power frequency adjustable range can reach 0.01~10Hz,
The input function of two kinds of waveform constant-current sources of triangular wave or sine wave can be achieved.
Tested 8 machine feedback of servo valve displacement input terminal opposite side is equipped with spring, when feedback push rod and tested servo
When wearing between valve mandril due to friction, abrading section self-compensating function can be realized by restoring spring.
Test process of the invention is as follows:
Step 1: tested servo valve being installed on testing stand, assembles servo valve dual input characteristic test system；
Step 2: user passes through host computer human-computer interaction interface input load signal；
Step 3: the servo valve output flow proportional to load signal, actuator pistons bar 3 are subjected to displacement, the displacement
Tested servo valve machine feedback displacement input terminal is fed back to by feeding back push rod 9；
Step 4: the displacement of machine feedback displacement input terminal is input to slave computer number by dual input displacement sensor 1 and patrols
Circuit is collected, slave computer Digital Logical Circuits gives displacement output to host computer human-computer interaction interface, host computer human-computer interaction circle
Face accordingly generates test curve and dual input characteristic index numerical value, and shows, whether judges servo valve dual input characteristic for user
It meets the requirements.
The present invention can be designed to that multistation, each station press above-mentioned testing stand conceptual design, pass through actuator set
The size design of cylinder realizes that the dual input of large, medium and small three kinds of specifications dual input servo valve of 20-200L/min range of flow is special
Property test.
There is the present invention system to start self-checking function, and the system that can be realized plays the different of various functions such as pressure, temperature before machine
Chang Zijian.
The content that description in the present invention is not described in detail belongs to the well-known technique of professional and technical personnel in the field.
Claims (10)
1. a kind of servo valve dual input characteristic test system, it is characterised in that: including TT&C system and testing stand；
Tested servo valve is installed on testing stand work top, and actuator is equipped on testing stand, is tested servo valve and is believed in load
Number acting on lower drive ram generates the displacement proportional with load signal, and feed back to tested servo valve machine feedback be displaced it is defeated
Enter end；
TT&C system includes slave computer Digital Logical Circuits and host computer human-computer interaction interface, and user passes through host computer human-computer interaction
The load signal is converted to constant-current source, is applied to tested servo by interface input load signal, slave computer Digital Logical Circuits
Valve electrical input, and the displacement of tested servo valve machine feedback displacement input terminal is acquired, feed back to host computer human-computer interaction interface
It is shown, judges whether servo valve dual input characteristic meets the requirements for user.
2. a kind of servo valve dual input characteristic test system according to claim 1, it is characterised in that: testing stand includes
Actuator, feedback push rod (9), shaft position sensor (11) and dual input displacement sensor (1)；
Tested servo valve is installed on testing stand work top, and machine feedback is displaced input terminal by feedback push rod (9) and makees
Actuator piston bar (3) vertically connects, and shaft position sensor (11) is connected by sensor connecting rod (10) and actuator pistons bar (3)
It connects, and the shaft position sensor (11) is parallel with actuator pistons bar (3)；Dual input displacement sensor (1) vertically connects
In on actuator pistons bar (3), slave computer Digital Logical Circuits is used to acquire the displacement of dual input displacement sensor；Tested servo
Two control chambers of the load cavity connection actuator of valve.
3. a kind of servo valve dual input characteristic test system according to claim 2, it is characterised in that: the actuator
Including actuator pistons bar (3), actuator left end cap (4), actuator sleeve (5) and actuator right end cap (6)；
Actuator left end cap (4) and actuator right end cap (6) are respectively arranged at left and right sides of actuator sleeve (5), and actuator is living
Stopper rod (3) passes through actuator left end cap (4) and actuator right end cap (6), and can be controlled along actuator pistons bar (3) sleeve
Movement, actuator pistons bar (3) sleeve and actuator left end cap (4) are integrally designed.
4. a kind of servo valve dual input characteristic test system according to claim 3, it is characterised in that: the feedback pushes away
Bar (9) includes the first push rod (91), the second push rod (92), feather key (17), bearing (18)；
First push rod (91) threaded one end is connected to inside the second push rod (92) head end, the machine of the other end and tested servo valve (8)
Tool feedback displacement input terminal connection；Second push rod (92) end is connect by bearing (18) with actuator pistons bar (3), and second pushes away
It is provided with keyway on the side wall of bar (92), is provided in keyway feather key (17), the fixed actuator pistons bar of the feather key (17)
(3) on sleeve lining.
5. a kind of servo valve dual input characteristic test system according to claim 4, it is characterised in that: pass through rotation the
One push rod (91), the initial position for adjusting actuator pistons bar (3) are located at center zero, prevent in motion process, and actuator is living
Stopper rod (3) and actuator cylinder body collide.
6. a kind of servo valve dual input characteristic test system according to claim 2, it is characterised in that: actuator pistons
Bar (3) is cone bar.
7. a kind of servo valve dual input characteristic test system according to claim 6, it is characterised in that: actuator pistons
The taper of bar (3)=actuator pistons bar (3) stroke/tested servo valve (8) double input end feeds back stroke.
8. a kind of servo valve dual input characteristic test system according to claim 2, it is characterised in that: testing stand also wraps
The excessive block (7) of installation is included, excessive block (7) setting oil circuit is installed, is tested the load cavity of servo valve (8) by installing excessive block (7)
On oil circuit and actuator two control chambers connect；
Tested servo valve (8) and actuator are installed on the excessive block (7) of installation, are installed excessive block (7) and are installed on testing stand work
On table top.
9. a kind of servo valve dual input characteristic test system according to claim 2, it is characterised in that: dual input displacement
Sensor (1) passes through the sleeve connection of sensor sleeve (2) and actuator pistons bar (3).
10. a kind of servo valve dual input characteristic test system according to claim 2, it is characterised in that: test process
It is as follows:
Step 1: tested servo valve being installed on testing stand, assembles servo valve dual input characteristic test system；
Step 2: user passes through host computer human-computer interaction interface input load signal；
Step 3: the servo valve output flow proportional to load signal, actuator pistons bar (3) are subjected to displacement, which passes through
Feedback push rod (9) feeds back to tested servo valve machine feedback displacement input terminal；
Step 4: the displacement of machine feedback displacement input terminal is input to slave computer Digital Logic by dual input displacement sensor (1)
Circuit, slave computer Digital Logical Circuits give displacement output to host computer human-computer interaction interface, host computer human-computer interaction interface
Test curve and dual input characteristic index numerical value are accordingly generated, and is shown, judges whether servo valve dual input characteristic is full for user
Foot requires.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910645872.6A CN110345132B (en) | 2019-07-17 | 2019-07-17 | Double-input characteristic test system for servo valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910645872.6A CN110345132B (en) | 2019-07-17 | 2019-07-17 | Double-input characteristic test system for servo valve |
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| Publication Number | Publication Date |
|---|---|
| CN110345132A true CN110345132A (en) | 2019-10-18 |
| CN110345132B CN110345132B (en) | 2021-07-09 |
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ID=68176667
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910645872.6A Active CN110345132B (en) | 2019-07-17 | 2019-07-17 | Double-input characteristic test system for servo valve |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114112347A (en) * | 2021-11-18 | 2022-03-01 | 庆安集团有限公司 | Small-size modularization constant force loading life test device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2427664Y (en) * | 2000-07-07 | 2001-04-25 | 周泰经 | Microcomputerized speed regulator directed linkage type hydraulic arrangement |
| CN206449056U (en) * | 2016-08-30 | 2017-08-29 | 北京交通大学 | Dual input servo valve dual input characteristic test frock and test system |
| CN207526811U (en) * | 2017-10-27 | 2018-06-22 | 北京精密机电控制设备研究所 | A kind of nozzle-flapper servo valve prestage discharge coefficient test device |
-
2019
- 2019-07-17 CN CN201910645872.6A patent/CN110345132B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2427664Y (en) * | 2000-07-07 | 2001-04-25 | 周泰经 | Microcomputerized speed regulator directed linkage type hydraulic arrangement |
| CN206449056U (en) * | 2016-08-30 | 2017-08-29 | 北京交通大学 | Dual input servo valve dual input characteristic test frock and test system |
| CN207526811U (en) * | 2017-10-27 | 2018-06-22 | 北京精密机电控制设备研究所 | A kind of nozzle-flapper servo valve prestage discharge coefficient test device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114112347A (en) * | 2021-11-18 | 2022-03-01 | 庆安集团有限公司 | Small-size modularization constant force loading life test device |
| CN114112347B (en) * | 2021-11-18 | 2024-04-09 | 庆安集团有限公司 | Small-size modular constant force loading life test device |
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| Publication number | Publication date |
|---|---|
| CN110345132B (en) | 2021-07-09 |
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