CN107449579B - A kind of big displacement electric vibration table - Google Patents
A kind of big displacement electric vibration table Download PDFInfo
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- CN107449579B CN107449579B CN201710654104.8A CN201710654104A CN107449579B CN 107449579 B CN107449579 B CN 107449579B CN 201710654104 A CN201710654104 A CN 201710654104A CN 107449579 B CN107449579 B CN 107449579B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
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Abstract
The present invention relates to a kind of big displacement electric vibration table, including stage body, setting is in stage body center moving-coil moving up and down, direct current exciting device, suspension support, the flexible air-bag and moving-coil support base for carrying out load bearing support to moving-coil bottom, guiding axis, driving circuit；Moving-coil is made of skeleton and driving coil, is integrally formed with ring week moving-coil gusset with it in skeleton upper end, corresponding with moving-coil gusset, and multiple uplink limit clapboards are fixedly installed on stage body；Suspension support is multiple U-shaped elastic arms being connected between stage body and moving-coil top around moving-coil setting；Excitation unit mainly includes magnetic cylinder, upper and lower magnet exciting coil, top crown and bottom crown；It is characterized in that guiding shaft length is than existing guiding axis extended length 10-12mm；The impact stroke of clapboard and moving-coil gusset place-limited edge lengthens 10-12mm than its existing impact stroke；The spread length of U-shaped elastic arm lengthens 10-12mm than the spread length of existing U-shaped elastic arm.
Description
Technical field
The present invention relates to technical field of mechanical environmental test more particularly to a kind of big displacement electric vibration tables.
Background technique
Electric vibration table is used for the vibration in test indoor simulation electric and electronic product in transport, storage, use process
Environment, the vibration-resistant property of testing product are widely used in the industries such as Aeronautics and Astronautics, electrician, electronics, instrument and meter, medical treatment, machinery.
Electric vibration table is the phase that the coil of certain alternating current is connected with by constant D.C. magnetic field and in the magnetic field
Electric power caused by interaction is come the shake table that drives.Its structure mainly includes stage body, be arranged in stage body it is central can on
The moving-coil of lower movement provides the excitation unit of D.C. magnetic field around moving-coil setting, carries out suspension strut to moving-coil top and hangs
The flexible air-bag and moving-coil support base hung supporting element, carry out load bearing support to moving-coil bottom, the guiding that moving-coil is oriented to
Axis and driving circuit.Wherein, moving-coil as oscillating component main component by top setting work top skeleton and coiling
Driving coil composition on skeleton, is integrally formed with moving-coil gusset in skeleton top ring Zhou Yuqi.Suspension support is around dynamic
Multiple U-shaped elastic arms being connected between moving-coil top and stage body of setting are enclosed, effect is to provide the moving-coil machinery vibration of permission
Dynamic stroke range namely moving-coil maximum displacement peak-to-peak value.The effect of guiding axis be traffic direction above and below moving-coil is carried out guiding and
Stroke positioning, and inhibit the oscillation crosswise and load bearing support effect in non-master vibration direction, so that moving-coil is gone always by setting during exercise
Journey is maintained at center.Multiple vertical clapboards being connected on stage body, clapboard and moving-coil are also set up around moving-coil top
The moving-coil gusset of skeleton cooperates, for limiting moving-coil uplink overtravel.Excitation unit mainly include surround moving-coil setting magnetic cylinder,
Magnet exciting coil up and down in magnetic cylinder, the top crown and bottom crown for being located at magnetic cylinder top, bottom.
When shake table works, it is passed through exciting current in magnet exciting coil, then is surrounded and is formed by excitation unit in stage body center
Annular space, that is, working gas gap in generate very strong radial D.C. magnetic field；By mechanicalness suspension support and guiding axis
Suspension is positioned in the moving-coil in working gas gap and passes to alternating current, then the driving current of this alternating current and working gas gap it
In direct current constant magnetic field interaction generate alternation electric power-exciting force, this exciting force make moving-coil by setting stroke on
Lower movement, which is transmitted on the work top of installation test specimen by moving coil framework, so that test specimen be pushed to vibrate.In addition, to protect
Card equipment setting stroke in be safely operated, be also provided with displacement protecting device, including moving-coil top be connected limited block, with
The limited block is corresponding to be equipped with bracket on stage body, is fixedly mounted with two fine motions up and down that two vertical distances are setting stroke thereon and opens
It closing, the microswitch is separately connected alarm, and limited block follower ring is displaced between two microswitches, once limited block collides
Any of to upper and lower microswitch, then alarm of its connection is connected, and control circuit received displacement alarm signal, is vibrated
Platform stops working.
But in existing electric vibration table, guiding axis runs maximum displacement peak-to-peak value up and down at most can only achieve 90mm,
Corresponding suspension support, the structure of the fit structure of clapboard and moving-coil gusset and displacement protecting device, being also all can only
Meet the working condition of maximum displacement peak-to-peak value 90mm.With the rapid development of the every profession and trades such as aerospace, some components are being ground
Demands processed carry out effective travel peak-to-peak value >=100mm big displacement qualification test, and existing hydraulic vibration gen is then unable to satisfy
Test demand.
In consideration of it, how to improve in existing electric vibration table structure basis, big displacement is realized, i.e. moving-coil is displaced
Peak-to-peak value >=100mm electric vibration table becomes the problem of industry is paid close attention to.
Summary of the invention
It is a primary object of the present invention in view of the above-mentioned problems, improved in existing electric vibration table structure basis,
A kind of big displacement electric vibration table is provided, realizes that moving-coil is displaced peak-to-peak value >=100mm, to meet the every profession and trades such as aerospace
In, some components carry out the requirement of big displacement qualification test, and every profession and trade is promoted to rapidly develop.
The technical solution adopted by the present invention to solve the technical problems is:
A kind of big displacement electric vibration table, including stage body are arranged in stage body center and moving up and down pass to alternating current
The moving-coil of stream, the direct current exciting device being arranged around moving-coil carry out the suspension support of suspension strut, to moving-coil to moving-coil top
Bottom carries out the flexible air-bag and moving-coil support base of load bearing support, and the guiding axis being oriented to up and down, and driving are carried out to moving-coil
Circuit；The moving-coil is made of the skeleton of top setting work top with the driving coil being wound on skeleton, in skeleton upper end
It is integrally formed with ring week moving-coil gusset with it, it is corresponding with the moving-coil gusset, multiple moving-coil gusset uplinks are fixedly installed on stage body
Limit clapboard；The suspension support is multiple U-shaped bullets being connected between stage body and moving-coil top around moving-coil setting
Property arm；Excitation unit mainly includes the magnetic cylinder for surrounding moving-coil setting, the magnet exciting coil up and down in magnetic cylinder, is located at magnetic cylinder
The top crown and bottom crown on top, bottom；Moving-coil under working condition is moved up and down by setting stroke；It is characterized in that the guiding
Shaft length is than existing guiding axis extended length 10-12mm；The impact stroke of the clapboard and moving-coil gusset place-limited edge is more existing than it
There is impact stroke to lengthen 10-12mm；The spread length of the U-shaped elastic arm lengthens 10- than the spread length of existing U-shaped elastic arm
12mm。
The existing guiding shaft length is 90mm；The existing impact stroke of the clapboard and moving-coil gusset place-limited edge is
90mm；The spread length of the existing U-shaped elastic arm is 90mm.
Every stiffener plate of the moving-coil gusset be made of the infolding inclined plate integrally connected at vertical plate and its top, and
Place-limited edge is formed in bending place, the place-limited edge reduces 5-6mm than existing place-limited edge, and infolding inclined plate corresponds to downward；The wedge shape
Plate is aligned with the place-limited edge above moving-coil gusset and is packed on stage body, and the clapboard shortens 5-6mm than existing clapboard.
It is corresponding with the limited block at described including the limited block being connected on moving-coil top equipped with displacement protecting device
Body is equipped with bracket, and being fixedly mounted with two vertical distances thereon is the microswitch for setting stroke, and the microswitch is separately connected report
Alert device, the limited block follower ring generate displacement between two microswitches.
The beneficial effects of the present invention are: by the transformation to existing electric vibration table, to influence electric vibration table stroke
Component has carried out structure and has improved and optimize, to realize that moving-coil is displaced peak-to-peak value >=100mm, it is many to meet aerospace etc.
In industry, some components carry out the requirement of big displacement qualification test, it is ensured that industry rapidly develops.At low cost, the easy implementation of the present invention,
Safety, is suitable for promoting in electric vibration table industry.Through above-mentioned technological improvement, big displacement electric vibration table provided by the invention,
Calibrating verifying is carried out to it according to the calibrating index in JJG 948-1999 " digital electric vibration experiment vertification regulation ",
The purpose for increasing shake table stroke is effectively realized, the growing test demand of the industries such as space flight and aviation is met.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention；
Fig. 2 is the enlarged structure schematic diagram of moving-coil part in Fig. 1；
Fig. 3 is the enlarged structure schematic diagram of suspension support part in Fig. 1；
Fig. 4 is the enlarged structure schematic diagram of clapboard and moving-coil gusset part in Fig. 1；
Fig. 5 is the enlarged structure schematic diagram of displacement protecting device；
In figure: 1 moving-coil, 2U shape elastic arm, 2 ' existing U-shaped elastic arms, 3 stage bodies, 4 magnetic cylinders, 5 stage body damping springs, 6 stage bodies
Bracket, 7 flexible air-bags, 81 top crowns, 82 bottom crowns, magnet exciting coil on 91,92 lower magnet exciting coils, 10 moving-coil support bases, 11
Guiding axis, 11 ' existing guiding axis, 12 driving coils, 13 clapboards, 13 ' existing clapboards, 14 moving-coil gussets, 15 skeletons, 16 limits
Position rib, 16 ' existing place-limited edges, 17 vertical plates, 17 ' existing vertical plates, 18, infolding inclined plate, 18 ' existing infolding inclined plates, 19-20 are micro-
Dynamic switch, 21 brackets, 22,23 alarms, 24 limited blocks.
Below in conjunction with drawings and examples to the detailed description of the invention.
Specific embodiment
Fig. 1-5 shows a kind of big displacement electric vibration table, including stage body 3, and it is moving up and down that center is arranged in stage body
The moving-coil 1 for passing to alternating current, the direct current exciting device being arranged around moving-coil 1, the suspension of suspension strut is carried out to 1 top of moving-coil
Supporting element, the flexible air-bag 7 and moving-coil support base 10 that load bearing support is carried out to 1 bottom of moving-coil carry out guiding up and down to moving-coil
Guiding axis 11 and driving circuit.As shown in Figure 1, stage body 3 is supported on stage body bracket 6, platform is additionally provided in 3 bottom of stage body
Body damping spring 5.
The effect of guiding axis 11 is that the principal oscillation direction run to about 1 moving-coil carries out guiding and stroke positioning, is inhibited non-
The oscillation crosswise in main vibration direction and load bearing support effect, guiding axis lower end are connect with flexible air-bag 7, and upper end passes through bolt and moving-coil
1 connection.The displacement of moving-coil movement is limited to the length of guiding axis, and guiding axis keeps moving-coil by setting stroke always during exercise
In center.
The moving-coil 1 is made of the skeleton 15 of top setting work top with the driving coil 12 being wound on skeleton.In
Skeleton upper end is integrally formed with ring week moving-coil gusset 14 with it, referring to fig. 4, corresponding with the moving-coil gusset 14, fixed on stage body
Multiple moving-coil gusset uplink limit clapboards 13 are set.In actual fabrication, every stiffener plate of the moving-coil gusset be by
18 integrally connected of infolding inclined plate at vertical plate 17 and its top is constituted, and forms place-limited edge 16, the place-limited edge 16 ratio in bending place
Existing place-limited edge 16 ' reduces 5-6mm namely vertical plate 17 and shortens 5-6mm than existing vertical plate 17 ', and existing infolding inclined plate 18 ' is right
It answers downward as infolding inclined plate 18；The clapboard 13 is aligned with the place-limited edge 16 above moving-coil gusset and is packed in stage body
On, the clapboard 13 shortens 5-6mm than existing clapboard 13 '.In this way, stroke increases 10- when moving-coil 1 moves up and down
12mm。
The suspension support is the multiple U-shaped bullets being connected between 1 top of stage body 3 and moving-coil being arranged around moving-coil 1
Property arm 2, provide the mechanical oscillation stroke range that a kind of moving-coil allows, moving-coil U-shaped elastic arm 2 when moving up and down can bear to bend
Power, and expansion is stretched, ring week, multiple U-shaped elastic arms played the role of moving-coil stroke limit and laterally centered positioning up and down；U-shaped bullet
Property arm 2 using copper sheet make, have good rigidity, flexibility and elasticity.
Excitation unit mainly includes magnetic cylinder 4, the upper magnet exciting coil 91 in magnetic cylinder and the lower excitation for surrounding the setting of moving-coil 1
Coil 92, the top crown 81 and bottom crown 82 for being located at magnetic cylinder top, bottom；Moving-coil 1 under working condition is by setting stroke
Lower movement.
The existing structure as shown in the dotted line in Fig. 2-4, the length of the existing guiding axis 11 ' of electric vibration table be H1 '=
90mm；The existing impact stroke of clapboard 13 ' and moving-coil gusset place-limited edge 16 ' is 90mm；The stretching, extension of existing U-shaped elastic arm 2 ' is long
Degree is 90mm.Therefore, existing electric vibration table maximum sets stroke, that is, maximum displacement peak-to-peak value=90mm.
The present invention is characterized in that the length of the guiding axis 11 is than existing 11 ' extended length 10-12mm of guiding axis, it is H1
=100-102mm.
Place-limited edge 16 reduces 5-6mm than existing place-limited edge 16 ', and infolding inclined plate corresponds to downward；The clapboard 13 is than existing
Clapboard 13 ' shortens 5-6mm.In this way, stroke increases H2 '=10-12mm when moving-coil 1 moves up and down.Therefore, clapboard
13 lengthen 10-12mm than its existing impact stroke with the impact stroke of moving-coil gusset place-limited edge 16, for 100-102mm.
The spread length of the U-shaped elastic arm 2 lengthens 10-12mm than the spread length of existing U-shaped elastic arm 2 ', is 100-
102mm.In this way, testing constantly in shake table, maximum displacement peak-to-peak value can reach or more than 100mm, it is electronic to become big displacement
Shake table.
Displacement protecting device is additionally provided in the present invention, as shown in figure 5, include the limited block 24 being connected on 1 top of moving-coil, with
The limited block 24 is corresponding to be equipped with bracket 21 on stage body, and being fixedly mounted with two vertical distances thereon is the microswitch for setting stroke
19,20, the microswitch 19,20 is connected to alarm 22,23 respectively, and 24 follower ring 1 of limited block produces between two microswitches
Raw displacement.When moving-coil 1 moves to upper limit position and the collision of microswitch 20, then alarm 22 is alarmed, when moving-coil 1 moves to limit inferior
Position and microswitch 19 collide, then alarm 23 is alarmed, and alarm signal can be fed back to control when alarming by alarm 22 or 23
Circuit processed, control circuit control shake table stops working, to ensure the electric vibration table and product safety.Such as the dotted line in Fig. 5
It is shown, vertical distance H3 '=90mm of existing electric vibration table microswitch；Improved electric vibration table microswitch 19,
Vertical distance H3=100-102mm between 20.Namely, safety travel value corresponding with moving-coil maximum displacement peak-to-peak value >=100mm
Also 100-102mm is increased to.Guarantee in big displacement stroke, test is normally carried out, reliably working.
In Fig. 1, displacement protecting device and driving circuit are not shown on rear side of stage body.In actual implementation, displacement protection
Device, limit clapboard 13 and suspension support are each provided at the position on corresponding 1 top of moving-coil.
Through above-mentioned technological improvement, big displacement electric vibration table provided by the invention, according to JJG 948-1999 " digital electric
Dynamic vibration experiment vertification regulation " in calibrating index calibrating verifying is carried out to it, effectively realize and increase shake table stroke
Purpose, meet the growing test demand of the industries such as space flight and aviation.
The above is only the preferred embodiment of the present invention, not makees any shape to structure and shape of the invention
Limitation in formula, according to the technical essence of the invention it is to the above embodiments it is any it is simple modification, equivalent variations with
Modification, all of which are still within the scope of the technical scheme of the invention.
Claims (5)
1. a kind of big displacement electric vibration table, including stage body, it is arranged in stage body that center is moving up and down to pass to alternating current
Moving-coil, around moving-coil setting direct current exciting device, to moving-coil top carry out suspension strut suspension support, to moving-coil bottom
Portion carries out the flexible air-bag and moving-coil support base of load bearing support, and the guiding axis being oriented to up and down, and driving electricity are carried out to moving-coil
Road；The moving-coil is made of the skeleton and the driving coil that is wound on skeleton of top setting work top, skeleton upper end with
It is integrally formed with ring week moving-coil gusset, corresponding with the moving-coil gusset, and multiple moving-coil gusset uplink limits are fixedly installed on stage body
Position clapboard；The suspension support is multiple U-shaped elasticity being connected between stage body and moving-coil top around moving-coil setting
Arm；Excitation unit mainly includes the magnetic cylinder for surrounding moving-coil setting, the magnet exciting coil up and down in magnetic cylinder, is located at magnetic cylinder
The top crown and bottom crown on top, bottom；Moving-coil under working condition is moved up and down by setting stroke；It is characterized in that the guiding
Shaft length is than existing guiding axis extended length 10-12mm；The impact stroke of the clapboard and moving-coil gusset place-limited edge is more existing than it
There is impact stroke to lengthen 10-12mm；The spread length of the U-shaped elastic arm lengthens 10- than the spread length of existing U-shaped elastic arm
12mm。
2. a kind of big displacement electric vibration table according to claim 1, it is characterised in that the existing guiding shaft length is
90mm；The existing impact stroke of the clapboard and moving-coil gusset place-limited edge is 90mm；The stretching, extension of the existing U-shaped elastic arm is long
Degree is 90mm.
3. a kind of big displacement electric vibration table according to claim 1 or 2, it is characterised in that every of the moving-coil gusset
Stiffener plate is to be made of the infolding inclined plate integrally connected at vertical plate and its top, and form place-limited edge, the limit in bending place
Position rib reduces 5-6mm than existing place-limited edge, and infolding inclined plate corresponds to downward；The clapboard above moving-coil gusset with the limit
Rib alignment is packed on stage body, and the clapboard shortens 5-6mm than existing clapboard.
4. a kind of big displacement electric vibration table according to claim 1 or 2, it is characterised in that it is equipped with displacement protecting device,
It is corresponding with the limited block that bracket is equipped on the stage body including the limited block being connected on moving-coil top, it is fixedly mounted with two thereon
Vertical distance is the microswitch for setting stroke, and the microswitch is separately connected alarm, and the limited block follower ring is two
Displacement is generated between a microswitch.
5. a kind of big displacement electric vibration table according to claim 3, it is characterised in that it is equipped with displacement protecting device, including
It is corresponding with the limited block that bracket is equipped on the stage body in the limited block that moving-coil top is connected, it is fixedly mounted with two thereon vertically
Distance is the microswitch of setting stroke, and the microswitch is separately connected alarm, and the limited block follower ring is micro- at two
Dynamic switch room generates displacement.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710654104.8A CN107449579B (en) | 2017-08-03 | 2017-08-03 | A kind of big displacement electric vibration table |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710654104.8A CN107449579B (en) | 2017-08-03 | 2017-08-03 | A kind of big displacement electric vibration table |
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| CN107449579A CN107449579A (en) | 2017-12-08 |
| CN107449579B true CN107449579B (en) | 2019-11-05 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109783937B (en) * | 2019-01-15 | 2019-12-17 | 王旭东 | Helicopter shooting vibration environment simple platform simulation system |
| CN110344966B (en) * | 2019-07-16 | 2021-01-05 | 北京强度环境研究所 | Device and method for constructing free boundary of solid rocket ground test |
| CN113720561A (en) * | 2021-09-27 | 2021-11-30 | 苏州苏试试验集团股份有限公司 | Vibration test platform for automobile generator |
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Effective date of registration: 20200407 Address after: 300000 No. 9 North Third Street, West District, Tianjin Binhai New Area Development Zone Co-patentee after: QINGDAO AEROSPACE RELIABILITY MARINE EQUIPMENT QUALITY SUPERVISION AND INSPECTION TECHNOLOGY Co.,Ltd. Patentee after: TIANJIN AEROSPACE RELIA TECHNOLOGY Co.,Ltd. Co-patentee after: BEIJING INSTITUTE OF STRUCTURE & ENVIRONMENT ENGINEERING Address before: 300000 No. 9 North Third Street, West District, Tianjin Binhai New Area Development Zone Co-patentee before: BEIJING INSTITUTE OF STRUCTURE & ENVIRONMENT ENGINEERING Patentee before: TIANJIN AEROSPACE RELIA TECHNOLOGY Co.,Ltd. |
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