CN105317778B - Structural test punching servo actuator - Google Patents
Structural test punching servo actuator Download PDFInfo
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- CN105317778B CN105317778B CN201510750640.9A CN201510750640A CN105317778B CN 105317778 B CN105317778 B CN 105317778B CN 201510750640 A CN201510750640 A CN 201510750640A CN 105317778 B CN105317778 B CN 105317778B
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- punching
- servo actuator
- piston rod
- piston
- cylinder body
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Abstract
A kind of structural test punching servo actuator, including servo actuator cylinder body, piston is slidably mounted in the servo actuator cylinder body, the piston is connected with piston rod, the piston and piston rod are with the punching via passed through for loading pull bar, the front end face of the piston rod is connected with load sensor, the loading tie-rod sealing is connected after passing through the punching via with the load sensor, displacement transducer is installed in the side of the servo actuator cylinder body, and institute's displacement sensors link with the piston rod.The present invention provides a kind of controlled loading effective in Instability and tries hard to avoid the structural test that sample of being excused from an examination is destroyed suddenly, security is higher, applicability is good punching servo actuator.
Description
Technical field
The present invention relates to civil engineering structure load test systems technology field, especially a kind of structural test start
Device.
Background technology
Existing civil engineering structure plate test loading system, especially civil engineering compression-shear test system, from open report
See, conventional loading method is that punching axle pressure thousand is placed at beam two ends with carrier bar in one group of test specimen upper surface arrangement or a few components
Jin top, pull bar is hingedly fixed on counter-force ground or self-reaction force framework after passing through jack by bottom, punching axle pressure jack
Effect be simulated gravity load；Horizontal direction arrangement servo actuator simulation shearing；Punching jack and servo actuator are pressed
Loading scheme is loaded to test specimen.
The defect of prior art is：Because punching jack uses hand-hydraulic loading, can only control manually very heavy
The oil pressure on top come control apply load, due to sample in Instability loading force with deformation no longer linearly or be monotonically correlated,
Cannot now be easily caused test specimen and destroy suddenly again by controlled loading power come the deformation of Control Assay, or even occur out of control to incline
The danger covered.
The content of the invention
In order to the uncontrollable loading force in Instability for overcoming existing structure experiment actuator causes sample unexpected
Destruction, the deficiency that security is relatively low, applicability is poor, the present invention provide a kind of controlled loading effective in Instability and try hard to avoid and exempts from
The structural test that sample is destroyed suddenly, security is higher, applicability is good punching servo actuator.
The technical solution adopted for the present invention to solve the technical problems is：
A kind of structural test punching servo actuator, including servo actuator cylinder body, in the servo actuator cylinder body
Piston is slidably mounted, the piston is connected with piston rod, the piston and piston rod are with for loading what pull bar was passed through
Punching via, the front end face of the piston rod is connected with load sensor, and the loading tie-rod sealing passes through the punching via
It is connected with the load sensor afterwards, displacement transducer, institute's displacement sensors are installed in the side of the servo actuator cylinder body
Linked with the piston rod.
Further, institute's displacement sensors are fixed on guiding mechanism, guiding mechanism fortune synchronous with the piston rod
It is dynamic.
Preferably, the guiding mechanism includes guide ring, guide holder and guide post, and the guide ring is solid with the piston rod
Fixed connection, the circle of the guide ring one is provided with pilot hole and displacement transducer mounting hole, the side peace of the servo actuator cylinder body
Two guide holders are filled, the guide post is fixed in the pilot hole and passes through a guide holder, institute's displacement sensors
In institute's displacement sensors mounting hole and pass through another guide holder.
Further, the bottom of the servo actuator cylinder body, piston rod and load sensor end face be respectively mounted for
It is fixed on the connection annex of the loading beam of structural test.
Further, the front end face of the piston rod is fixed with the one side of terminal pad, the another side of the terminal pad with it is negative
Lotus sensor is fixedly connected.
The servo actuator cylinder body includes the rear end of rear end cap, cylinder and drive end bearing bracket, the rear end cap and cylinder
Connection, drive end bearing bracket is connected with the front end of cylinder, and piston is slideably sleeved on cylinder
Interior, the loading pull bar passes through the punching via by sealing sleeve pipe.Certainly, rear end cap, cylinder can also
In being wholely set.
The piston and piston rod are in one.Certainly, piston and piston rod can also split set, as long as both are fixed
Link together.
Technology design of the invention is：Punching servo actuator is designed for replacing original manual punching jack to be examination
Part provides axially loaded power, with conventional servo actuator identical oil cylinder piston design and fabrication technology, it is ensured that punching servo is made
Dynamic utensil has extremely low frictional force and zero clearance leakage, and closed-loop control loading examination can be completed as the servo actuator of standard
Test.
Actuator not only has all of function of punching jack, and on the basis of configuration load sensor, configuration
Displacement transducer, in process of the test, computer control system can by the action of servo valve control punching servo actuator,
The synchronous parallel loading of multiple punching actuator can not only be realized, exception can also occur with load sample deformation is detected
When, keep the output displacement of punching servo actuator loading head constant.So, civil engineering structure compression-shear test can not only be realized
Loading, and can solve common punching jack uncontrollable loading force in Instability causes sample to destroy suddenly
Problem so that whole process of the test is controllable, ensures testing crew personal safety.When being applied in combination, multi-axial forces can be met same
The complicated load test requirement such as step, ladder synchronization.
Beneficial effects of the present invention are mainly manifested in：In Instability, effective controlled loading is tried hard to avoid sample of being excused from an examination and is broken suddenly
Bad, security is higher, applicability is good.
Brief description of the drawings
Fig. 1 is the structure chart of structural test punching servo actuator.
Fig. 2 is the side view of Fig. 1.
Fig. 3 is the top view of Fig. 1.
Fig. 4 is the instance graph of post shock test.
Fig. 5 is the instance graph of frame structure shock test.
Specific embodiment
The invention will be further described below in conjunction with the accompanying drawings.
1~Fig. 5 of reference picture, a kind of structural test punching servo actuator, including servo actuator cylinder body 1, it is described to watch
Take in actuator cylinder body 1 and be slidably mounted piston 2, the piston 2 is connected with piston rod 3, and the piston 2 and piston rod 3 are equal
With the punching via 4 passed through for loading pull bar, the front end face of the piston rod 3 is connected with load sensor 5, and the loading is drawn
It is connected with the load sensor 5 after punching via 4 described in bar hermetically passing, the side of the servo actuator cylinder body 1 is installed
Displacement transducer 6, institute's displacement sensors 6 link with the piston rod 3.
Further, institute's displacement sensors 6 are fixed on guiding mechanism, and the guiding mechanism is synchronous with the piston rod 3
Motion.
Preferably, the guiding mechanism includes guide ring 7, guide holder 11 and guide post 8, the guide ring 7 and the work
Stopper rod 3 is fixedly connected, and the circle of the guide ring 7 one is provided with pilot hole and displacement transducer mounting hole, the servo actuator cylinder body 1
Side two guide holders 11 are installed, the guide post 8 is fixed in the pilot hole and passes through a guide holder, described
Displacement transducer 6 is arranged in institute's displacement sensors mounting hole and passes through another guide holder 11.
Further, the bottom of the servo actuator cylinder body 1, piston rod 3 and the end face of load sensor 5 are respectively mounted use
In the connection annex of the loading beam of fixed structure experiment.
Further, the front end face of the piston rod 3 is fixed with the one side of terminal pad 9, the another side of the terminal pad 9 with
Load sensor 5 is fixedly connected.
The servo actuator cylinder body 1 includes the rear end of rear end cap, cylinder and drive end bearing bracket, the rear end cap and cylinder
Connection, drive end bearing bracket is connected with the front end of cylinder, and piston 2 is slideably sleeved in cylinder, and the loading pull bar is by close
Big envelope pipe 10 passes through the punching via.Certainly, rear end cap, cylinder can also be in and be wholely set.
The piston 2 and piston rod 3 are in one.
In the present embodiment, the punching servo actuator is used and general-purpose servo actuator identical processing technology, use
Enter mouthful seal and guide ring.From punching servo actuator piston unlike generic servo actuator and piston rod using one
Formula structure simultaneously carries punching via 4, and piston rod 3 links together with load sensor 5.
The structural test punching servo actuator of the present embodiment is applied in post shock test device,
The post shock test device includes counter-force ground 12, punching bar 17 and carries on the back tight bottom girder 15, carries distribution beam 13, water
Flat servo actuator 16 and punching servo actuator 18, the punching bar and the tight bottom girder of the back of the body are fixedly mounted on counter-force ground, institute
State punching bar and carry on the back and test specimen 14 (post) is installed on tight bottom girder, the upper end of the test specimen is installed and carries distribution beam 13, carries distribution beam
Punching servo actuator 18 is installed in 13 upper end, and the lower end of punching bar 17 is fixed with tight bottom girder 15 is carried on the back, through the carrying distribution beam
13 and punching servo actuator 18, it is connected with load sensor by nut, side and the horizontal servo start of the test specimen 14
The telescopic end of device 16 is hinged, and the other end of the horizontal servo actuator 16 is hinged on counter force wall.
The structural test punching servo actuator of the present embodiment is applied in frame structure shock test device, it is described
Frame structure shock test device counter-force ground 12, punching bar 17 and the tight bottom girder 15 of the back of the body, carrying distribution beam 13, horizontal servo start
Device 16 and punching servo actuator 18, multiple punching bars 17 and the tight bottom girder 15 of the back of the body are fixedly mounted on counter-force ground, multiple
Test specimen 14 (frame structure) is installed, the upper end of each post of the frame structure carries distribution on the punching bar and the tight bottom girder of the back of the body
Punching servo actuator 18 is installed in beam 13, the upper end for carrying distribution beam, and the lower end of punching bar 17 is fixed with the tight bottom girder 15 of the back of the body, through holding
Distribution beam 13 and punching servo actuator are carried, is connected with load sensor by nut, each side of beam of the frame structure
Face is hinged with the telescopic end of horizontal servo actuator 16, and the other end of the horizontal servo actuator is hinged on counter force wall.
When actual tests, Electronic-hydraulic Servo Controller passes through punching servo actuator by servo valve control Hydraulic servo system
Vertical load is applied to sample, it is possible to achieve vertical load keeps control with the electro-hydraulic servo closed-loop control of displacement and position with load
System, it is possible to achieve many steps of punching servo actuator load are synchronously loaded or Asynchronous loading.In addition, being detected in controller
Stop loading when sample unstability or critical slope langth or the control condition of arrival setting, be transferred to position and keep controlling, prevent large-scale
The sudden destroying of concrete structure sample and the danger for thus resulting in.
Claims (5)
1. a kind of structural test punching servo actuator, it is characterised in that：Including servo actuator cylinder body, the servo start
Piston is slidably mounted in device cylinder body, the piston is connected with piston rod, the piston and piston rod are with for loading drawing
The punching via that bar is passed through, the front end face of the piston rod is connected with load sensor, and the loading tie-rod sealing is described in
It is connected with the load sensor after punching via, the front end face of the piston rod is fixed with the one side of terminal pad, the connection
The another side of disk is fixedly connected with load sensor, and displacement transducer, institute's rheme are installed in the side of the servo actuator cylinder body
Displacement sensor links with the piston rod, and guiding mechanism includes guide ring, guide holder and guide post, the guide ring and the work
Stopper rod is fixedly connected, and the circle of the guide ring one is provided with pilot hole and displacement transducer mounting hole, the servo actuator cylinder body
Two guide holders are installed in side, and the guide post is fixed in the pilot hole and passes through a guide holder, the displacement
Sensor is arranged in institute's displacement sensors mounting hole and passes through another guide holder.
2. structural test as claimed in claim 1 punching servo actuator, it is characterised in that：Institute's displacement sensors are fixed
On guiding mechanism, the guiding mechanism is synchronized with the movement with the piston rod.
3. the punching servo actuator of the structural test as described in one of claim 1~2, it is characterised in that：The servo is made
Bottom, piston rod and the load sensor end face for moving device cylinder body are respectively mounted the connection of the loading beam for being fixed on structural test
Annex.
4. the punching servo actuator of the structural test as described in one of claim 1~2, it is characterised in that：The servo is made
Dynamic device cylinder body includes rear end cap, cylinder and drive end bearing bracket, and the rear end cap is connected with the rear end of cylinder, drive end bearing bracket and cylinder
Front end connection, piston is slideably sleeved in cylinder, and the loading pull bar passes through the punching mistake by sealing sleeve pipe
Hole.
5. the punching servo actuator of the structural test as described in one of claim 1~2, it is characterised in that：The piston and
Piston rod is in one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510750640.9A CN105317778B (en) | 2015-11-05 | 2015-11-05 | Structural test punching servo actuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510750640.9A CN105317778B (en) | 2015-11-05 | 2015-11-05 | Structural test punching servo actuator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105317778A CN105317778A (en) | 2016-02-10 |
| CN105317778B true CN105317778B (en) | 2017-07-04 |
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| CN201510750640.9A Active CN105317778B (en) | 2015-11-05 | 2015-11-05 | Structural test punching servo actuator |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106802224A (en) * | 2017-03-20 | 2017-06-06 | 杭州邦威机电控制工程有限公司 | A kind of modularization electro-hydraulic servo vertical load loading device |
| CN108072562B (en) * | 2017-11-28 | 2020-01-17 | 中国航发沈阳发动机研究所 | Hollow actuator |
| CN115899013B (en) * | 2023-03-09 | 2023-05-26 | 江苏恒立液压股份有限公司 | Core penetrating oil cylinder and using method thereof |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH086811B2 (en) * | 1986-01-25 | 1996-01-29 | 株式会社阪上製作所 | Double pressure piston seal |
| CN201407225Y (en) * | 2009-05-13 | 2010-02-17 | 沈阳中之杰流体控制系统有限公司 | High-frequency servo oil cylinder |
| EP2290245A1 (en) * | 2009-08-27 | 2011-03-02 | WOW Company | Actuator with a counter compression means and pre compression means |
| CN101900148A (en) * | 2010-07-12 | 2010-12-01 | 无锡市长江液压缸厂 | Short-stroke pressure-maintaining high-pressure heavy hydraulic cylinder with high-pressure proximity switches |
| CN203239675U (en) * | 2013-03-29 | 2013-10-16 | 天津市威力工程千斤顶有限公司 | Cross-center oil cylinder for measuring tensile strength |
| CN203606260U (en) * | 2013-10-29 | 2014-05-21 | 浙江建设职业技术学院 | Service simulation device for reinforced concrete member in ocean environment |
| CN205117880U (en) * | 2015-11-05 | 2016-03-30 | 杭州邦威机电控制工程有限公司 | Servo actuator of punching for structural test |
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