CN103048009B - Horizontal drive ultralow-frequency modal test hoisting device - Google Patents
Horizontal drive ultralow-frequency modal test hoisting device Download PDFInfo
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- CN103048009B CN103048009B CN201210594965.9A CN201210594965A CN103048009B CN 103048009 B CN103048009 B CN 103048009B CN 201210594965 A CN201210594965 A CN 201210594965A CN 103048009 B CN103048009 B CN 103048009B
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- air supporting
- air
- supporting ring
- air flotation
- installing plate
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- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention provides a horizontal drive ultralow-frequency modal test hoisting device which comprises an air flotation ring mounting plate, a proximity switch, an air flotation ring, an air flotation flat plate and a rope clamping component, wherein the air flotation ring is fixedly arranged on the air flotation ring mounting plate; the proximity switch is arranged on the air flotation ring mounting plate; the air flotation flat plate is placed right above the air flotation ring; the rope clamping component is arranged at the center of the air flotation flat plate; throttling orifices are uniformly distributed in the air flotation ring along the circumferential direction; air inlets of the throttling orifices are communicated with grooves in the air flotation ring mounting plate, and air outlets of the throttling orifices of the air flotation ring are provided with three circles of round grooves; two round grooves are tangential and have tangency points passing through the air outlets of the throttling orifices, and another round groove utilizes the throttling orifices as a center and is communicated with the other two round grooves; the air inlets of the throttling orifices of the air flotation ring are provided with round grooves isolated from an air inlet groove in the air flotation ring mounting flat plate; and the center of the air flotation ring mounting plate is provided with a round through hole with the internal diameter less than that of the air flotation ring. The planar motion of the horizontal drive ultralow-frequency modal test hoisting device is basically unconstrained and is free from the influence of friction force and inertia force.
Description
Technical field
The present invention relates to a kind of modal test device.
Background technology
Along with the develop rapidly of space flight and aviation technology, the demand of low frequency, ultra-low frequency modal test analysis is increasing.In order to make to have during Spacecraft guidance and control modal parameter accurately can be for reference, to avoid the mistake causing resonance etc. unnecessary, modal analysis test must be carried out to spacecraft.The modal analysis test test structure body that comes up on the basis of test structural member being carried out to exciting excitation comprises the dynamic perfromance of spacecraft structure, natural frequency, Mode Shape and damping, generalized mass, generalized stifflness etc.
Weightlessness is a principal character of space environment, and for the mould measurement test in vertical direction, the rigid motion frequency in suspension apparatus vertical direction will be a principle gained universal acceptance lower than test specimen fundamental frequency order of magnitude.At present, the shaping modal test suspension system model of CSA engineering corporation of the U.S. is 60350-DA, domestic changing into develops mode apparatus system voluntarily, application number be 200710071515.0 " air-float magneto motive friction-free suspension device " disclose one and can meet Nyquist criterion, additional mass is enough little, non-linear effects is little, the vertical direction mode suspension apparatus that measuring accuracy is high, application number be 201020214510.6 " ultra-low frequency modal test suspension system " done further improvement, disclose a kind of totally digitized control, improve frequency of operation, promote control accuracy, and reduce the ultra-low frequency modal test suspension system of optional feature on the impact of modal test.
For the modal test in horizontal direction, the major constraints of freedom-free boundary condition is friction force, the inertia effects of additional mass and pendulum effect, and suspender must balance measurand gravity, reaches plane accompany movement substantially without retraining.In order to obtain the modal test of horizontal direction, usually be all that band is surveyed part half-twist, the ultralow modal test suspension system of recycling vertical direction is tested, but for suspension complexity, hold flimsy to be measured, this method imperfection, and also there is no ripe horizontal modal test suspender at present.
Summary of the invention
In order to overcome the deficiency that cannot realize horizontal direction mould measurement of existing modal test device, the invention provides that a kind of plane motion is substantially unconfined, the horizontal drive ultra-low frequency modal test erecting by overhang of zerofriction force and inertia force influence.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of horizontal drive ultra-low frequency modal test erecting by overhang, comprise air supporting ring installing plate, proximity switch, air supporting ring, air supporting is dull and stereotyped and block rope assembly, described air supporting ring is fixed on air supporting ring installing plate, described proximity switch is arranged on air supporting ring installing plate, described air supporting flat board is placed on directly over air supporting ring, and described card rope assembly is arranged on the center of air supporting flat board;
Along the circumferential direction uniform throttle orifice on described air supporting ring, the air intake opening of described throttle orifice communicates with the groove on air supporting ring installing plate, described air supporting link discharge orifice gas outlet place is provided with three ring annular grooves, described ring groove has that two groups tangent and throttle orifice gas outlet is crossed at point of contact, another ring groove is the center of circle with throttle orifice and communicates with another two groups of ring grooves, there is annular groove described air supporting link discharge orifice air intake opening both sides, the air inlet groove that described annular groove and air supporting ring are installed on flat board is mutually isolated, there is manhole at described air supporting ring installing plate center, the internal diameter of described manhole is slightly smaller than air supporting ring internal diameter, described air supporting ring installing plate there is a circle air inlet groove, described air inlet groove communicates with throttle orifice on air supporting ring, lead to air inlet groove from the side punching of air supporting ring installing plate and communicate with air admission hole in air inlet groove, described air supporting ring installing plate there is threaded hole, described threaded hole is distributed on air inlet groove both sides and matches with air supporting ring upper screwed hole.
Further, described air supporting ring installing plate is in square, and described proximity switch is arranged on four angles of air supporting ring installing plate.Described air supporting ring installing plate also can be designed to other shapes according to actual conditions, and the annular groove on described air supporting ring also can be split into other forms, can balanced air supporting ring upward pressure.
Further, the dull and stereotyped lower surface flat smooth of described air supporting, the dull and stereotyped upper surface of described air supporting has stiffening rib.Air supporting flat board adopts lightweight design.
Further again, described card rope assembly comprises card rope chassis, wire rope handling half cone card, locking clamp, locking deck, described card rope chassis and air supporting plate center are fixed, described card rope center chassis has conical through-hole, described card rope chassis radially has bar-shaped trough from center conical through-hole, described wire rope handling half cone card has two, described two wire rope handling half cones are fastened togather center chassis conical through-hole of restricting with card and mate, described suspension strop through the tapered centre hole of wire rope handling half cone card and the engaging of wire rope handling half cone is held together time by male cone (strobilus masculinus) thrust clamping suspension strop, described locking deck is fixed on card rope chassis, described locking clamp inserts locking deck after closing up wire rope handling half cone card, the described locking clamp other end is bolted on card rope chassis.
Technical conceive of the present invention is: this horizontal drive ultra-low frequency modal test erecting by overhang, and form air film by throttle orifice between air supporting ring and air supporting flat board, suspension strop is hung by air supporting plate center, can within the scope of air supporting ring installing plate endoporus frictionless motion.Air supporting ring installing plate surrounding is provided with proximity switch, signal feedback is played a protective role to control system when the motion of air supporting flat board exceedes range of movement.Due to pole low-frictional force, the load of hanging planar can be close to and freely move and rotate, the dynamic constrained power of change test specimen Mode Shape can not be introduced thus guarantee that in modal test, test data is effective, credible.
Gases at high pressure enter air inlet groove from air supporting ring installing plate air intake opening, again by the throttle orifice ejection on air supporting ring, without tracheae disturbing influence, go out to have ring groove in air supporting link discharge orifice gas outlet, ring groove plays the effect of all pressing, gases at high pressure flow out from air supporting ring both sides, there is pressure gradient, and load-bearing capacity strengthens.
Card rope assembly all adopts lightweight to design, air supporting plate center has manhole, suspension strop is connected with to be measured through behind air supporting plate center hole, the mould measurement that existing device can be utilized first to carry out in vertical direction is tested, after test completes, after utilizing card rope assembly clamping suspension strop, the mould measurement test unit on suspension strop and vertical direction is unclamped, carry out the modal test in horizontal direction, achieve and once hang twice test.Card rope chassis there is bar-shaped trough radially, can easily card rope base plate be installed in air supporting plate center hole, again by wire rope handling half cone card clamping suspension strop, closed up by locking clamp after wire rope handling half cone card and insert locking deck, the other end of locking clamp is fixed by bolt and card chassis of restricting.
Beneficial effect of the present invention is mainly manifested in: plane motion is substantially unconfined, zerofriction force and inertia force influence.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of horizontal drive ultra-low frequency modal test erecting by overhang.
Fig. 2 is the schematic perspective view of air supporting ring installing plate.
Fig. 3 is the reverse side schematic perspective view of air supporting ring.
Fig. 4 is the front schematic perspective view of air supporting ring.
Fig. 5 is the schematic perspective view of air supporting flat board.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
With reference to Fig. 1 ~ Fig. 5, a kind of horizontal drive ultra-low frequency modal test erecting by overhang, comprise air supporting ring installing plate 1, proximity switch 2, air supporting ring 6, air supporting flat board 3, card rope assembly, wherein, described card rope assembly comprises card rope chassis 5, wire rope handling half cone card 4, locking clamp 17, locking deck 16.Described air supporting ring 6 is fixed on air supporting ring installing plate 1 by threaded hole 14, described proximity switch 2 is arranged on four angles of air supporting ring installing plate 1 by threaded hole 11, described air supporting flat board 3 is placed on directly over air supporting ring 6, and described card rope assembly is arranged on the center of air supporting flat board 3.
Along the circumferential direction uniform throttle orifice 12 on described air supporting ring 6, the air intake opening of described throttle orifice 12 communicates with the groove 9 on air supporting ring installing plate 1, described air supporting link discharge orifice 12 gas outlet place mills out three ring annular grooves 15, described ring groove 15 has that two groups tangent and throttle orifice gas outlet is crossed at point of contact, another ring groove is the center of circle with throttle orifice and communicates with another two groups of ring grooves, there is annular groove 13 described air supporting link discharge orifice air intake opening 12 both sides, described annular groove 13 and air supporting ring install the air inlet groove 9 mutually isolated (namely not communicating) of dull and stereotyped upper 1, described annular groove also 13 can be split into other forms, can balanced air supporting ring 6 upward pressure.Described air supporting ring installing plate 1 is in square, there is manhole at described air supporting ring installing plate 1 center, the internal diameter of described manhole is slightly smaller than air supporting ring 6 internal diameter, described air supporting ring installing plate 1 there is a circle air inlet groove 9, described air inlet groove 9 communicates with throttle orifice 12 on air supporting ring 6, lead to air inlet groove from the side punching 7 of air supporting ring installing plate 1 and communicate with air admission hole 8 in air inlet groove, described air supporting ring installing plate 1 there is threaded hole 10, described threaded hole 10 is distributed on air inlet groove both sides and matches with air supporting ring upper screwed hole 14, described in described gas, air supporting ring installing plate 1 also can be designed to other forms according to actual conditions.The dull and stereotyped 3 lower surface flat smooth of described air supporting, upper surface has stiffening rib, and air supporting flat board adopts lightweight design.
Described card rope chassis 5 is fixed with dull and stereotyped 3 centers of air supporting, there is conical through-hole at described card rope center, chassis 5, described card rope chassis 5 radially has bar-shaped trough from center conical through-hole, described wire rope handling half cone card 4 has two, described two wire rope handling half cone cards 4 are combined chassis 5 tapered centre through hole of restricting with card and mate, described suspension strop through the tapered centre hole of wire rope handling half cone card 4 and wire rope handling half cone card 4 closes up time by male cone (strobilus masculinus) thrust clamping suspension strop, described locking deck 16 is fixed on card rope chassis 5, described locking clamp 17 inserts locking deck 16 after closing up wire rope handling half cone card 4, described locking clamp 17 other end is bolted on card rope chassis 5.
Claims (4)
1. a horizontal drive ultra-low frequency modal test erecting by overhang, it is characterized in that: comprise air supporting ring installing plate, proximity switch, air supporting ring, air supporting is dull and stereotyped and block rope assembly, described air supporting ring is fixed on air supporting ring installing plate, described proximity switch is arranged on air supporting ring installing plate, described air supporting flat board is placed on directly over air supporting ring, and described card rope assembly is arranged on the center of air supporting flat board;
Along the circumferential direction uniform throttle orifice on described air supporting ring, the air intake opening of described throttle orifice communicates with the groove on air supporting ring installing plate, described air supporting link discharge orifice gas outlet place is provided with three ring annular grooves, described ring groove has that two groups tangent and throttle orifice gas outlet is crossed at point of contact, another ring groove is the center of circle with throttle orifice and communicates with another two groups of ring grooves, there is annular groove described air supporting link discharge orifice air intake opening both sides, air inlet groove on described annular groove and air supporting ring installing plate is mutually isolated, there is manhole at described air supporting ring installing plate center, the internal diameter of described manhole is slightly smaller than air supporting ring internal diameter, described air supporting ring installing plate there is a circle air inlet groove, described air inlet groove communicates with throttle orifice on air supporting ring, lead to air inlet groove from the side punching of air supporting ring installing plate and communicate with air admission hole in air inlet groove, described air supporting ring installing plate there is threaded hole, described threaded hole is distributed on air inlet groove both sides and matches with air supporting ring upper screwed hole.
2. horizontal drive ultra-low frequency modal test erecting by overhang as claimed in claim 1, is characterized in that: described air supporting ring installing plate is in square, and described proximity switch is arranged on four angles of air supporting ring installing plate.
3. horizontal drive ultra-low frequency modal test erecting by overhang as claimed in claim 1 or 2, is characterized in that: the dull and stereotyped lower surface flat smooth of described air supporting, and the dull and stereotyped upper surface of described air supporting has stiffening rib.
4. horizontal drive ultra-low frequency modal test erecting by overhang as claimed in claim 1 or 2, it is characterized in that: described card rope assembly comprises card rope chassis, wire rope handling half cone card, locking clamp, locking deck, described card rope chassis and air supporting plate center are fixed, described card rope center chassis has conical through-hole, described card rope chassis radially has bar-shaped trough from center conical through-hole, described wire rope handling half cone card has two, described two wire rope handling half cones are fastened togather center chassis conical through-hole of restricting with card and mate, suspension strop through the tapered centre hole of wire rope handling half cone card and the engaging of wire rope handling half cone is held together time by male cone (strobilus masculinus) thrust clamping suspension strop, described locking deck is fixed on card rope chassis, described locking clamp inserts locking deck after closing up wire rope handling half cone card, the described locking clamp other end is bolted on card rope chassis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210594965.9A CN103048009B (en) | 2012-12-31 | 2012-12-31 | Horizontal drive ultralow-frequency modal test hoisting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210594965.9A CN103048009B (en) | 2012-12-31 | 2012-12-31 | Horizontal drive ultralow-frequency modal test hoisting device |
Publications (2)
| Publication Number | Publication Date |
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| CN103048009A CN103048009A (en) | 2013-04-17 |
| CN103048009B true CN103048009B (en) | 2015-02-25 |
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| CN201210594965.9A Expired - Fee Related CN103048009B (en) | 2012-12-31 | 2012-12-31 | Horizontal drive ultralow-frequency modal test hoisting device |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4181026A (en) * | 1978-04-19 | 1980-01-01 | Hughes Aircraft Company | Quasi-random pneumatic vibration facility and automatic frequency modulating system therefor |
| CN101122547A (en) * | 2007-09-21 | 2008-02-13 | 浙江工业大学 | Follow-up type air-floating magneto-motive friction-free suspension device |
| CN101126681A (en) * | 2007-09-21 | 2008-02-20 | 浙江工业大学 | Air-float magneto motive friction-free suspension device |
| CN101850854A (en) * | 2010-06-03 | 2010-10-06 | 浙江工业大学 | Ultra-low frequency modal test suspension system |
| CN203177875U (en) * | 2012-12-31 | 2013-09-04 | 浙江工业大学 | Horizontal excitation ultralow frequency modal test suspension device |
-
2012
- 2012-12-31 CN CN201210594965.9A patent/CN103048009B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4181026A (en) * | 1978-04-19 | 1980-01-01 | Hughes Aircraft Company | Quasi-random pneumatic vibration facility and automatic frequency modulating system therefor |
| CN101122547A (en) * | 2007-09-21 | 2008-02-13 | 浙江工业大学 | Follow-up type air-floating magneto-motive friction-free suspension device |
| CN101126681A (en) * | 2007-09-21 | 2008-02-20 | 浙江工业大学 | Air-float magneto motive friction-free suspension device |
| CN101850854A (en) * | 2010-06-03 | 2010-10-06 | 浙江工业大学 | Ultra-low frequency modal test suspension system |
| CN203177875U (en) * | 2012-12-31 | 2013-09-04 | 浙江工业大学 | Horizontal excitation ultralow frequency modal test suspension device |
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| CN103048009A (en) | 2013-04-17 |
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Address after: Hangzhou City, Zhejiang province 310014 City Zhaohui District Six Patentee after: Zhejiang University of Technology Address before: 310014 Chao Wang Road, Xiacheng City, Hangzhou, Zhejiang Province, No. 18 Patentee before: Zhejiang University of Technology |
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Effective date of registration: 20191209 Address after: 314300 room 243, building 1, new economy Pioneer Park, Tongyuan Town, Haiyan County, Jiaxing City, Zhejiang Province Patentee after: Jiaxing senchuang home furnishing Co.,Ltd. Address before: 310018 Room 1004-1006, 17 Block 57, Baiyang Street Science Park Road, Hangzhou Economic and Technological Development Zone, Zhejiang Province Patentee before: Zhejiang Qibo Intellectual Property Operation Co.,Ltd. Effective date of registration: 20191209 Address after: 310018 Room 1004-1006, 17 Block 57, Baiyang Street Science Park Road, Hangzhou Economic and Technological Development Zone, Zhejiang Province Patentee after: Zhejiang Qibo Intellectual Property Operation Co.,Ltd. Address before: Hangzhou City, Zhejiang province 310014 City Zhaohui District Six Patentee before: Zhejiang University of Technology |
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Granted publication date: 20150225 Termination date: 20191231 |
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| CF01 | Termination of patent right due to non-payment of annual fee |