CN103939520B - A kind of passive vibration isolation device being applicable to low-frequency vibration - Google Patents
A kind of passive vibration isolation device being applicable to low-frequency vibration Download PDFInfo
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- CN103939520B CN103939520B CN201410078384.9A CN201410078384A CN103939520B CN 103939520 B CN103939520 B CN 103939520B CN 201410078384 A CN201410078384 A CN 201410078384A CN 103939520 B CN103939520 B CN 103939520B
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Abstract
The object of the present invention is to provide a kind of passive vibration isolation device being applicable to low-frequency vibration, comprise crust of the device, vibration-isolating platform, crust of the device comprises housing main body, shell lateral body, shell lateral body is arranged on the side of housing main body, first magnet is installed in shell lateral body, first spring is installed in housing main body, second spring, second magnet, first magnet is relative with the homopolarity of the second magnet, the upper end of vibration-isolating platform is positioned at housing main body outside, the lower end of vibration-isolating platform is connected with the second magnet, first spring to be arranged between the second magnet and housing main body upper end inwall and to be placed on vibration-isolating platform, second spring is arranged between the second magnet and housing main body lower end inner wall.The present invention can meet the requirement of high static stiffness and low dynamic rate, ensures less Static Correction and low frequency vibration isolation performance.The impact that precision type instrument or driver are subject to foundation vibration and impact effectively can be reduced by the present invention.
Description
Technical field
What the present invention relates to is a kind of isolation mounting.
Background technique
Along with industrialized development, the requirement of people to isolating technique is more and more higher, such as precision type instrument low frequency vibration isolation platform, and the seat of helicopter pilot etc. need the good anti-vibration performance when low frequency.Traditional passive vibration isolation technology such as single-layer partiting polarization, double-layer vibration isolating, buoyant raft vibration isolation etc. can isolate mechanical equipment vibration effectively to the transmission on basis and the vibration of foundation to the transmission of equipment, at boats and ships, Aero-Space, a lot of field such as automobile is widely used.But the same with other vibration control technology, passive vibration isolation technology also has it to be difficult to the shortcoming overcome.As the vibration isolation efficiency in order to improve low frequency, require that vibration damper must have enough low rigidity, but in order to ensure certain bearing capacity and stability, need again larger static stiffness.Therefore traditional passive vibration isolation technology also exists the problem weighed between dynamic rate and static deformation all the time.And although some novel vibration isolators can meet above-mentioned requirements, complex structure, cost is higher.
Summary of the invention
The object of the present invention is to provide the requirement that can meet high static stiffness and low dynamic rate, ensure a kind of passive vibration isolation device being applicable to low-frequency vibration of less Static Correction and low frequency vibration isolation performance.
The object of the present invention is achieved like this:
A kind of passive vibration isolation device being applicable to low-frequency vibration of the present invention, it is characterized in that: comprise crust of the device, vibration-isolating platform, crust of the device comprises housing main body, shell lateral body, shell lateral body is arranged on the side of housing main body, first magnet is installed in shell lateral body, first spring is installed in housing main body, second spring, second magnet, first magnet is relative with the homopolarity of the second magnet, the upper end of vibration-isolating platform is positioned at housing main body outside, the lower end of vibration-isolating platform is connected with the second magnet, first spring to be arranged between the second magnet and housing main body upper end inwall and to be placed on vibration-isolating platform, second spring is arranged between the second magnet and housing main body lower end inner wall.
The present invention can also comprise:
1, in shell lateral body, slide block is set, first magnet is fixed on slide block, and slide block installs screw rod, and shell lateral body arranges tapped hole, screw rod, through tapped hole and slide block, controls the position of slide block thus the distance of adjustment the first magnet and the second magnet by adjusting screw rod.
2, contact between the second magnet with housing main body inwall, thus in the process that the second magnet moves up and down in the second magnet and housing main body wall friction produce damping.
3, housing main body inwall arranges guide groove, the second magnet arranges guide block, the second magnet is moved up and down along guide groove by guide block.
Advantage of the present invention is: the present invention can meet the requirement of high static stiffness and low dynamic rate, ensures less Static Correction and low frequency vibration isolation performance.The impact that precision type instrument or driver are subject to foundation vibration and impact effectively can be reduced by the present invention.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Magnet free-body diagram when Fig. 2 is excited target of the present invention.
Embodiment
Below in conjunction with accompanying drawing citing, the present invention is described in more detail:
Composition graphs 1 ~ 2, magnet 4 is fixed on slide block 9, motionless relative to housing stationary in housing chamber when magnet 4 works, and can be regulated and magnet 5 spacing by screw thread, the magnet 5 that two spring supportings vertically can vibrate at the cavity of housing 6, and during balance, two magnet are just right.Friction between magnet 5 and device case 6 produces damping, and there is guide groove the side, housing chamber of vertical direction, and vibration-isolating platform 1 and magnet 5 fix and vibrates with magnet 5 in guide groove.Device case 6 is the hardness such as aluminium more greatly and not magnetic conductive material, and spring is copper.
Device is as schemed vertical placement, magnet 4 is placed in housing side cavity by the adjustment of threaded stem 8 keeps spacing l with magnet 5, magnet 5 is placed in the cavity of housing vertical direction and also supports with spring 2,3, the homopolarity of initial rest position magnet 4,5 is relative, device is placed on ground 7, by vibration isolation object as precision type instrument or vehicle driver etc. are placed in vibration-isolating platform 1, when ground 7 is subject to exciting force effect, effectively can reduce by the vibration isolation of this device the impact that precision type instrument or driver are subject to foundation vibration and impact.
When weight is placed on magnet 5, under the effect of two springs, keep static, camber of spring is very little, and vibration isolator shows very high Static stiffness.Magnet 4 and the opposing parallel placement of magnet 5 homopolarity, when vibration occurs magnet 5 under dynamic exciting, magnet 5 departs from equipoise x, and magnet 5 is F by the component of repulsive force in the vertical direction
1=-xC
m/ (l
2+ x
2)
3/2, get the once item-xC of this power Taylor expansion
m/ l
3contrary with the direction of spring force, if the rigidity of spring is regarded as the positive rigidity of system, then repulsive force shows as the negative stiffness of system.Therefore the dynamic stiffness of system is less, thus realizes the isolation of lower frequency vibration, and structure is simple, and cost is low.Two magnet spacings can be regulated by threaded stem, close along with two magnet spacings, and the absolute value of negative stiffness increases, and when the total dynamic rate reaching certain numerical value system is 0, therefore dynamic rate of the present invention easily regulates.
Claims (5)
1. one kind is applicable to the passive vibration isolation device of low-frequency vibration, it is characterized in that: comprise crust of the device, vibration-isolating platform, crust of the device comprises housing main body, shell lateral body, shell lateral body is arranged on the side of housing main body, first magnet is installed in shell lateral body, first spring is installed in housing main body, second spring, second magnet, first magnet is relative with the homopolarity of the second magnet, the upper end of vibration-isolating platform is positioned at housing main body outside, the lower end of vibration-isolating platform is connected with the second magnet, first spring to be arranged between the second magnet and housing main body upper end inwall and to be placed on vibration-isolating platform, second spring is arranged between the second magnet and housing main body lower end inner wall.
2. a kind of passive vibration isolation device being applicable to low-frequency vibration according to claim 1, it is characterized in that: in shell lateral body, slide block is set, first magnet is fixed on slide block, slide block installs screw rod, shell lateral body arranges tapped hole, screw rod, through tapped hole and slide block, controls the position of slide block thus the distance of adjustment the first magnet and the second magnet by adjusting screw rod.
3. a kind of passive vibration isolation device being applicable to low-frequency vibration according to claim 1 and 2, it is characterized in that: contact between the second magnet with housing main body inwall, thus in the process that the second magnet moves up and down in the second magnet and housing main body wall friction produce damping.
4. a kind of passive vibration isolation device being applicable to low-frequency vibration according to claim 1 and 2, is characterized in that: housing main body inwall arranges guide groove, and the second magnet arranges guide block, and the second magnet is moved up and down along guide groove by guide block.
5. a kind of passive vibration isolation device being applicable to low-frequency vibration according to claim 3, is characterized in that: housing main body inwall arranges guide groove, and the second magnet arranges guide block, and the second magnet is moved up and down along guide groove by guide block.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410078384.9A CN103939520B (en) | 2014-03-05 | 2014-03-05 | A kind of passive vibration isolation device being applicable to low-frequency vibration |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410078384.9A CN103939520B (en) | 2014-03-05 | 2014-03-05 | A kind of passive vibration isolation device being applicable to low-frequency vibration |
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| CN103939520A CN103939520A (en) | 2014-07-23 |
| CN103939520B true CN103939520B (en) | 2016-01-27 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110410443A (en) * | 2019-08-05 | 2019-11-05 | 北京航空航天大学 | A kind of zero stiffness shock isolating apparatus |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105402297B (en) * | 2014-08-14 | 2017-10-20 | 香港理工大学 | magnetic negative stiffness damper |
| CN104763765B (en) * | 2015-04-10 | 2016-10-05 | 山东大学 | The piecewise linearity vibration isolator of a kind of high quiet low dynamic stiffness and method of work thereof |
| CN105805204B (en) * | 2016-03-29 | 2018-11-02 | 石翔 | Passive linear magnetic negative stiffness device |
| CN108223970B (en) * | 2018-01-25 | 2024-01-26 | 福建省南安市天威消防设备有限公司 | Anti-collision type ground hydrant |
| CN111677801A (en) * | 2020-06-29 | 2020-09-18 | 哈尔滨工业大学 | Three-degree-of-freedom electromagnetic vibration isolation device based on positive and negative rigidity parallel connection |
| CN111677811A (en) * | 2020-06-29 | 2020-09-18 | 哈尔滨工业大学 | Three-degree-of-freedom electromagnetic vibration isolation device based on parallel connection of positive stiffness and negative stiffness of magnetic repulsion force |
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| FR1598856A (en) * | 1968-03-19 | 1970-07-06 | ||
| CN202560921U (en) * | 2012-02-20 | 2012-11-28 | 东南大学 | Leak-free electromagnetic fluid damper |
| CN202579800U (en) * | 2012-02-20 | 2012-12-05 | 东南大学 | Non-leakage rotating fluid damper |
| CN203219211U (en) * | 2013-01-11 | 2013-09-25 | 浙江工商大学 | Efficient wideband vibrating energy collector with elastic amplifying mechanism |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0642585A (en) * | 1992-07-23 | 1994-02-15 | Showa Electric Wire & Cable Co Ltd | Active vibration isolation device |
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2014
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1598856A (en) * | 1968-03-19 | 1970-07-06 | ||
| CN202560921U (en) * | 2012-02-20 | 2012-11-28 | 东南大学 | Leak-free electromagnetic fluid damper |
| CN202579800U (en) * | 2012-02-20 | 2012-12-05 | 东南大学 | Non-leakage rotating fluid damper |
| CN203219211U (en) * | 2013-01-11 | 2013-09-25 | 浙江工商大学 | Efficient wideband vibrating energy collector with elastic amplifying mechanism |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110410443A (en) * | 2019-08-05 | 2019-11-05 | 北京航空航天大学 | A kind of zero stiffness shock isolating apparatus |
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| CN103939520A (en) | 2014-07-23 |
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Effective date of registration: 20170204 Address after: 215000 Jiangsu high tech Zone, Suzhou hi tech Zone Longshan Road, No. 2 Patentee after: SUZHOU DONGLING INTELLIGENT VIBRATION AND NOISE REDUCTION TECHNOLOGY CO.,LTD. Address before: 150001 Heilongjiang, Nangang District, Nantong street,, Harbin Engineering University, Department of Intellectual Property Office Patentee before: HARBIN ENGINEERING University |
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Effective date of registration: 20170619 Address after: 215000 Jiangsu high tech Zone, Suzhou hi tech Zone Longshan Road, No. 2 Patentee after: SUZHOU DONGLING INTELLIGENT VIBRATION AND NOISE REDUCTION TECHNOLOGY CO.,LTD. Address before: 15 Heilongjiang, Nangang Province, Nantong street, building No. 258, building, ship, floor, No. 150001 Patentee before: Harbin Engineering University Science Park Development Co.,Ltd. Effective date of registration: 20170619 Address after: 15 Heilongjiang, Nangang Province, Nantong street, building No. 258, building, ship, floor, No. 150001 Patentee after: Harbin Engineering University Science Park Development Co.,Ltd. Address before: 150001 Heilongjiang, Nangang District, Nantong street,, Harbin Engineering University, Department of Intellectual Property Office Patentee before: HARBIN ENGINEERING University |
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