CN203587304U - Electric servo cylinder earthquake simulation vibrating table in small engineering structure - Google Patents
Electric servo cylinder earthquake simulation vibrating table in small engineering structure Download PDFInfo
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- CN203587304U CN203587304U CN201320657504.1U CN201320657504U CN203587304U CN 203587304 U CN203587304 U CN 203587304U CN 201320657504 U CN201320657504 U CN 201320657504U CN 203587304 U CN203587304 U CN 203587304U
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- piston rod
- vibrating table
- shaking table
- table top
- earthquake simulation
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Abstract
The utility model discloses an electric servo cylinder earthquake simulation vibrating table in small engineering structure. The electric servo cylinder earthquake simulation vibrating table comprises a vibrating table pedestal, a servo motor, an electric servo actuator, a vibrating table top, and a prestress gapless connection mechanism, wherein the vibrating table pedestal is connected with the vibrating table top through a linear guide rail pair; a tested piece is placed on the vibrating table top; the servo motor is mounted below the vibrating table pedestal; an output shaft of the servo motor is connected with an input shaft of the electric servo actuator used for converting rotation into rectilinear motion; an output shaft of the electric servo actuator is connected with a piston rod; a motion direction of the piston rod is consistent with a motion direction of the linear guide rail pair; a table top driving connection seat and the prestress gapless connection mechanism are mounted at the front end of the piston rod; and the upper end of the table top driving connection seat is fixedly connected with the vibrating table top. The electric servo cylinder earthquake simulation vibrating table in small engineering structure may simplify structure, decrease cost, and shorten a production period and a single test period.
Description
Technical field
The utility model relates to earthquake simulator, especially a kind of earthquake simulation shaking table.
Background technology
Domestic shaking table is divided into two classes:
The first kind is the electric vibration table of electromagnetic exciting, and this class shaking table is mainly used in test specimen vibration resistance, and such shaking table highest frequency can reach 1000Hz, and maximum exciting force can reach 50 tons.But maximum shortcoming is that low-limit frequency can not be too low, is generally not less than 1Hz, and peak swing can not be too large, is generally not more than 50mm, and earthquake simulation test shaking table belongs to diverse two categories, is generally not used in the research of the shock resistance of civil structure.
Equations of The Second Kind is electro-hydraulic servo vibration table.The research of domestic electro-hydraulic servo vibration table starts from the seventies, China Seismology Bureau's engineering mechanics has been succeeded in developing First Domestic 6DOF shaking table, but only belong to the exploitation of making research equipment by oneself, do not complete commercialization development, poor reliability, there is no and come into operation, seismological bureau's engineering mechanics is invested more than 5,000 ten thousand and has been ordered the large-scale six-degree of freedom vibration platform of American MTS company now.Real domestic six-degree of freedom vibration platform is still blank at present.Domestic electro-hydraulic servo vibration table was growing up in recent years, but main hydraulic control system still relies on import, and the feature of this kind equipment to be still scale large, investment is large, production is long with the mini-test cycle, is not suitable for mini engineering structural test and university's experimental teaching use.
Summary of the invention
In order to overcome, complex structure, the cost of existing earthquake simulation shaking table is high, production and oversize deficiency of mini-test cycle, and the utility model provides a kind of simplified structure, reduce costs, shorten and produce and the mini engineering structure electric servoBcylinder earthquake simulation shaking table in mini-test cycle.
The utility model solves the technical scheme that its technical matters adopts:
A kind of mini engineering structure electric servoBcylinder earthquake simulation shaking table, described earthquake simulation shaking table involving vibrations platform base, servomotor, electrical servo actuator, vibration table surface and prestress seamless connectivity mechanism, on described shaking table base, by line slideway auxiliary, be connected with vibration table surface, on described vibration table surface, place test specimen, described servomotor is installed in the below of described shaking table base, the output shaft of described servomotor with in order to being that the input shaft of straight-line electrical servo actuator is connected by rotational transform, the output shaft of described electrical servo actuator is connected with piston rod, the direction of motion of described piston rod is consistent with the direction of motion of described line slideway auxiliary, the front end of described piston rod is installed table top and is driven Connection Block and prestress seamless connectivity mechanism, described table top drives the upper end of Connection Block to be fixedly connected with described vibration table surface, described prestress seamless connectivity mechanism comprises attaching nut, tightening cushion and pre-load nut, described table top drives the lower end of Connection Block to be sleeved on the thread segment of described piston rod, described table top drives the upper cover of piston rod load connected nut of a side of Connection Block, on the piston rod of the opposite side of described table top driving Connection Block, be set with successively tightening cushion and pre-load nut, between described tightening cushion and pre-load nut, be provided with gap, one circle of described pre-load nut has at least three pretension threaded holes, pretension screw contacts on described tightening cushion through described pretension threaded hole.
Further, described servomotor is air-cooled servomotor.Certainly, can be also the servomotor of other types.
Further, described electrical servo actuator is arranged on the below of described shaking table base by bent plate.
Further again, described electrical servo actuator is leading screw and nut mechanism.Also can select other kinematic relation throw-over gears, as long as the rotation of motor can be converted to the straight reciprocating motion of piston rod.
Technical conceive of the present utility model is: the physical construction being connected with shaking table stage body for vibrator-electrical servo actuator of electrical servo shaking table.So-called electrical servo shaking table is to adopt electrical servo actuator as a class shaking table (document 1,2 sees reference) of seismic oscillation platform vibrator, and the feature of such shaking table is that equipment scale is little, and stroke is large, low frequency, and seismic wave in analog, and invest little.The effect of this patent is the gap of eliminating between the servo-driver of electric vibration table and stage body connection, guaranteed that earthquake simulation test does not have joint gap between driver and table top when the crucial turning point of seismic event, reduce the degree of distortion of earthquake simulation test, improved the usability of electric vibration table.
The beneficial effects of the utility model are mainly manifested in: 1, simplified structure, reduce costs, shorten and produce and the mini-test cycle; 2, the performance that has improved electrical servo shaking table, has expanded the scope of application.This series products is applied in mini engineering shock test and college teaching experiment, replaced construction period electro-hydraulic servo vibration table long, that scale of investment is large significant.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of mini engineering structure electric servoBcylinder earthquake simulation shaking table.
Fig. 2 is the vertical view of Fig. 2.
Fig. 3 is the schematic diagram of prestress seamless connectivity mechanism.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described.
With reference to Fig. 1～Fig. 3, a kind of mini engineering structure electric servoBcylinder earthquake simulation shaking table, described earthquake simulation shaking table involving vibrations platform base 1, servomotor 2, electrical servo actuator 3, vibration table surface 5 and prestress seamless connectivity mechanism 8, on described shaking table base 1, by line slideway auxiliary 4, be connected with vibration table surface 5, on described vibration table surface 5, place test specimen, described servomotor 2 is installed in the below of described shaking table base 1, the output shaft of described servomotor 2 with in order to being that the input shaft of straight-line electrical servo actuator 3 is connected by rotational transform, the output shaft of described electrical servo actuator 3 is connected with piston rod 7, the direction of motion of described piston rod 7 is consistent with the direction of motion of described line slideway auxiliary 4, the front end of described piston rod 7 is installed table top and is driven Connection Block 6 and prestress seamless connectivity mechanism 8, described table top drives the upper end of Connection Block 6 to be fixedly connected with described vibration table surface 5, described prestress seamless connectivity mechanism 8 comprises attaching nut 14, tightening cushion 11 and pre-load nut 13, described table top drives the lower end of Connection Block 6 to be sleeved on the thread segment of described piston rod 7, described table top drives the upper cover of piston rod load connected nut 14 of a side of Connection Block 6, on the piston rod of the opposite side of described table top driving Connection Block, be set with successively tightening cushion 11 and pre-load nut 13, between described tightening cushion 11 and pre-load nut 13, be provided with gap, one circle of described pre-load nut 13 has at least three pretension threaded holes, pretension screw 12 contacts on described tightening cushion 11 through described pretension threaded hole.
In the present embodiment, the reference for installation that shaking table base 1 is shaking table, place on the ground, electrical servo actuator 3 is installed to the below of shaking table base 1 by bent plate, the output shaft of air-cooled servomotor 2 is connected with the input shaft of electrical servo actuator 3, the rotation of air-cooled servomotor 2 can pass to electrical servo actuator 3, by its inner screw-nut body, rotatablely moving of motor 2 is converted into the rectilinear motion of piston rod 7, piston rod 7 passes motion to vibration table surface 5 by prestress latch mechanism 8, described piston rod 7 is through shaking table base 1, and on described shaking table base 1, have the space of moving for described piston rod, vibration table surface 5 is connected with shaking table base 1 by line slideway auxiliary 4, guarantee that vibration table surface 5 can only move along the direction of motion of piston rod 7, it is single dof mobility, computer control 9 is according to the requirement of trial curve, send command signal and make its satisfactory motion to air-cooled servomotor 2, thereby the test specimen 10 that makes to be arranged on vibration table surface 5 is vibrated, and tests its performance.
Electrical servo actuator, as vibrator, is connected with the prestress seamless connectivity device designing by this patent between table top, has eliminated the gap between vibrator and table top, has improved response wave shape.
Seismic waveshape is inputted to computer control, computer control be take this waveform as controlling target, to servo-driver, assign instruction, driving servomotor rotates, by mechanical transmission mechanism, make vibration table along one-dimensional square to vibration, the acceleration signal of acceleration transducer collection table top and driver send displacement signal and feed back to controller, controller after receiving feedback signal compares this signal and input waveform, when the error of acceleration transducer surpass theoretical value 2% time, computer control reduces output order voltage, until the signal feeding back theoretical value 2% in, when the error of acceleration transducer be less than theoretical value 2% time, computer control increases output order voltage, until the signal feeding back theoretical value 2% in, actual waveform is conformed to input waveform.
Sense of rotation and the speed of servomotor 2 is controlled in the instruction that computer control is assigned, acceleration, the output shaft of servomotor is connected with the input shaft of servo actuator, the principle of work of servo actuator by feed screw nut will rotatablely move and be converted into rectilinear motion, the piston rod 7 of servo actuator drives Connection Block 6 to be closely connected by prestress seamless connectivity mechanism 8 with table top, thereby the motion of piston rod 7 is accurately passed to vibration table surface 5, vibration table surface 5 is by line slideway auxiliary 4 and shaking table base 1 seamless connectivity, make vibration table surface 5 only have the one degree of freedom along direction of vibration, can prevent that test specimen 10 is because the upsetting moment of generation of vibration is delivered on the piston rod 7 of servo actuator simultaneously, and damage machine.On vibration table surface 5, acceleration transducer is installed, acceleration signal is gathered by computer control, by contrast, and round-off error, thus guarantee that the vibrational waveform of output conforms to input waveform, realizes servocontrol target.Test specimen 10 can be installed acceleration transducer, speed pickup, displacement transducer etc. above, and the directly response of testing engineering structural seismic model to earthquake, meets structural seismic research required.
Shaking table is adjusted the screw 12 on pre-load nut 13 with spanner in assembling factory, tightening cushion 11, table top are driven between the joint face between Connection Block 6, attaching nut 14 and produce prestress, prestressed setting value is 2 times of maximum exciting force, during normal use, the piston rod 7 of servo actuator there will not be connection loosening, guaranteed the coupling stiffness of shaking table drive part, thereby guaranteed that the response of complete machine meets request for utilization.
In the present embodiment, air-cooled servomotor is as the exciting source of earthquake motion platform, and can obtain comparatively ideal seismic acceleration simulate effect.
The electrical servo shaking table of exploitation adopts common hinge joints to connect in advance, through experimental study, finds, due to the existence of joint gap, causes Acceleration pulse when surpassing 0.5g, to occur distortion phenomenon.This patent is applied to electrical servo shaking table after the system reform of prestress hinge joints is become to prestress bindiny mechanism, thoroughly eliminated the impact of joint gap on earthquake simulation test, the usability that has improved electrical servo shaking table, vibration table surface acceleration can reach 1.2g.
The piston rod of electrical servo actuator drives Connection Block to be connected by screw rod and table top, has end play owing to being threaded, and therefore adopts prestress seamless connectivity mechanism end play can be eliminated.During installation, prestress is maximum exciting force 2 times, piston rod is closely connected with nut, and there is all the time snap-in force in surface of contact, during test, because maximum test force is no more than pretightning force, so screw thread can not become flexible, and axially will no longer include gap.
Claims (4)
1. a mini engineering structure electric servoBcylinder earthquake simulation shaking table, it is characterized in that: described earthquake simulation shaking table involving vibrations platform base, servomotor, electrical servo actuator, vibration table surface and prestress seamless connectivity mechanism, on described shaking table base, by line slideway auxiliary, be connected with vibration table surface, on described vibration table surface, place test specimen, described servomotor is installed in the below of described shaking table base, the output shaft of described servomotor with in order to being that the input shaft of straight-line electrical servo actuator is connected by rotational transform, the output shaft of described electrical servo actuator is connected with piston rod, the direction of motion of described piston rod is consistent with the direction of motion of described line slideway auxiliary, the front end of described piston rod is installed table top and is driven Connection Block and prestress seamless connectivity mechanism, described table top drives the upper end of Connection Block to be fixedly connected with described vibration table surface, described prestress seamless connectivity mechanism comprises attaching nut, tightening cushion and pre-load nut, described table top drives the lower end of Connection Block to be sleeved on the thread segment of described piston rod, described table top drives the upper cover of piston rod load connected nut of a side of Connection Block, on the piston rod of the opposite side of described table top driving Connection Block, be set with successively tightening cushion and pre-load nut, between described tightening cushion and pre-load nut, be provided with gap, one circle of described pre-load nut has at least three pretension threaded holes, pretension screw contacts on described tightening cushion through described pretension threaded hole.
2. mini engineering structure electric servoBcylinder earthquake simulation shaking table as claimed in claim 1, is characterized in that: described servomotor is air-cooled servomotor.
3. mini engineering structure electric servoBcylinder earthquake simulation shaking table as claimed in claim 1 or 2, is characterized in that: described electrical servo actuator is arranged on the below of described shaking table base by bent plate.
4. mini engineering structure electric servoBcylinder earthquake simulation shaking table as claimed in claim 1 or 2, is characterized in that: described electrical servo actuator is leading screw and nut mechanism.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320657504.1U CN203587304U (en) | 2013-10-23 | 2013-10-23 | Electric servo cylinder earthquake simulation vibrating table in small engineering structure |
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| CN201320657504.1U CN203587304U (en) | 2013-10-23 | 2013-10-23 | Electric servo cylinder earthquake simulation vibrating table in small engineering structure |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103528781A (en) * | 2013-10-23 | 2014-01-22 | 浙江工业大学 | Electric servo cylinder earthquake simulation vibrating table in small engineering structure |
| CN106530928A (en) * | 2016-12-26 | 2017-03-22 | 立方通达实业（天津）有限公司 | Earthquake simulation test equipment |
| CN107192525A (en) * | 2017-06-13 | 2017-09-22 | 南昌大学 | A kind of civil engineering structure shock test device |
| CN109883638A (en) * | 2019-04-09 | 2019-06-14 | 黄淮学院 | A kind of Hollow Block Masonry Structure Anti-seismic toughness detection device and detection method |
| CN113790864A (en) * | 2021-09-18 | 2021-12-14 | 阳光学院 | Civil engineering structure shock resistance test device |
-
2013
- 2013-10-23 CN CN201320657504.1U patent/CN203587304U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103528781A (en) * | 2013-10-23 | 2014-01-22 | 浙江工业大学 | Electric servo cylinder earthquake simulation vibrating table in small engineering structure |
| CN103528781B (en) * | 2013-10-23 | 2015-11-04 | 浙江工业大学工程设计集团有限公司 | Mini engineering structure electric servoBcylinder earthquake simulation shaking table |
| CN106530928A (en) * | 2016-12-26 | 2017-03-22 | 立方通达实业（天津）有限公司 | Earthquake simulation test equipment |
| CN106530928B (en) * | 2016-12-26 | 2019-05-17 | 立方通达实业（天津）有限公司 | Earthquake simulation test equipment |
| CN107192525A (en) * | 2017-06-13 | 2017-09-22 | 南昌大学 | A kind of civil engineering structure shock test device |
| CN109883638A (en) * | 2019-04-09 | 2019-06-14 | 黄淮学院 | A kind of Hollow Block Masonry Structure Anti-seismic toughness detection device and detection method |
| CN113790864A (en) * | 2021-09-18 | 2021-12-14 | 阳光学院 | Civil engineering structure shock resistance test device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: ZHEJIANG POLYTECHNICAL UNIVERSITY HANGZHOU POPWIL Free format text: FORMER OWNER: HANGZHOU POPWIL INSTRUMENT CO., LTD. Effective date: 20150713 Owner name: ZHEJIANG UNIVERSITY OF TECHNOLOGY ENGINEERING DESI Free format text: FORMER OWNER: ZHEJIANG POLYTECHNICAL UNIVERSITY Effective date: 20150713 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20150713 Address after: Hangzhou City, Zhejiang Province, 310014 village school district six Zhegong Da Zhaohui Patentee after: ZHEJIANG UNIVERSITY OF TECHNOLOGY ENGINEERING DESIGN GROUP CO., LTD. Patentee after: Zhejiang University of Technology Patentee after: Hangzhou Popwil Instrument Co., Ltd. Address before: The city Zhaohui six districts Chao Wang Road Hangzhou City, Zhejiang province 310014 18 Patentee before: Zhejiang University of Technology Patentee before: Hangzhou Popwil Instrument Co., Ltd. |