CN103939520A - Passive vibration isolation device suitable for low frequency vibration - Google Patents
Passive vibration isolation device suitable for low frequency vibration Download PDFInfo
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- CN103939520A CN103939520A CN201410078384.9A CN201410078384A CN103939520A CN 103939520 A CN103939520 A CN 103939520A CN 201410078384 A CN201410078384 A CN 201410078384A CN 103939520 A CN103939520 A CN 103939520A
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- vibration isolation
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Abstract
The invention aims to provide a passive vibration isolation device suitable for low frequency vibration. The passive vibration isolation device comprises a device shell and a vibration isolation platform. The device shell comprises a shell body and a shell side body. The shell side body is arranged on the side face of the shell body, a first magnet is installed in the shell side body, a first spring, a second spring and a second magnet are installed in the shell body, the positive pole of the first magnet and the positive pole of the second magnet are opposite, the negative pole of the first magnet and the negative pole of the second magnet are opposite, the upper end of the vibration isolation platform is located outside the shell body, the lower end of the vibration isolation platform is connected with the second magnet, the first spring is arranged between the second magnet and the inner wall of the upper end of the shell body, the vibration isolation platform is sleeved with the first spring, and the second spring is arranged between the second magnet and the inner wall of the lower end of the shell body. The requirements for high static rigidity and low dynamic rigidity can be met, and small static displacement and low frequency vibration isolation performance are guaranteed. Through the device, the influences of foundation vibration and impact on a precise instrument or a driver can be effectively reduced.
Description
Technical field
What the present invention relates to is a kind of isolation mounting.
Background technique
Along with industrialized development, people are more and more higher to the requirement of vibration isolation, precision type instrument low frequency vibration isolation platform for example, helicopter pilot's seat etc. need to be when low frequency good anti-vibration performance.Traditional passive vibration isolation technology can be isolated the transmission of mechanical equipment vibration to basic transmission and the vibration of foundation to equipment effectively as single-layer partiting polarization, double-layer vibration isolating, buoyant raft vibration isolation etc., at boats and ships, Aero-Space, a lot of fields such as automobile are widely used.But the shortcoming the same with other vibration control technology, passive vibration isolation technology also has it to be difficult to overcome.As in order to improve the vibration isolation efficiency of low frequency, require vibration damper must there is enough low rigidity, but in order to guarantee certain bearing capacity and stability, need again larger static stiffness.Therefore traditional passive vibration isolation technology exists the problem of weighing 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, guarantee that less off-position moves a kind of passive vibration isolation device that is applicable to low-frequency vibration with low frequency vibration isolation performance.
The object of the present invention is achieved like this:
A kind of passive vibration isolation device that is 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, the first magnet is installed in shell lateral body, the first spring is installed in housing main body, the second spring, the second magnet, the 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, the first spring is arranged between the second magnet and housing main body upper end inwall and is placed on vibration-isolating platform, the second spring is arranged between the second magnet and housing main body lower end inwall.
The present invention can also comprise:
1, in shell lateral body, slide block is set, the first magnet is fixed on slide block, and screw rod is installed on slide block, on shell lateral body, tapped hole is set, screw rod passes tapped hole and slide block, thereby controls position adjusting first magnet of slide block and the distance of the second magnet by adjusting screw rod.
2, between the second magnet and housing main body inwall, contact, thus in the process moving up and down at the second magnet in the second magnet and housing main body wall friction produce damping.
3, on housing main body inwall, guide groove is set, on the second magnet, guide block is set, the second magnet moves 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, guarantees that less off-position moves and low frequency vibration isolation performance.By the present invention, can effectively reduce the impact that precision type instrument or driver are subject to foundation vibration and impact.
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, for example the present invention is described in more detail:
In conjunction with Fig. 1～2, magnet 4 is fixed on slide block 9, during magnet 4 work in housing chamber with respect to housing transfixion, and can regulate and magnet 5 spacings by screw thread, the magnet 5 that two spring supportings can vertically vibrate at the cavity of housing 6, during balance two magnet over against.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 fixes in guide groove with magnet 5 vibrations with magnet 5.The hardness such as device case 6 is aluminium are magnetic conductive material more greatly and not, and spring is copper.
Device as figure vertically place, magnet 4 is placed in the cavity and magnet 5 maintenance spacing l of housing side by the adjusting of threaded stem 8, magnet 5 is placed in the cavity of housing vertical direction and with spring 2,3 and supports, the homopolarity of initial rest position magnet 4,5 is relative, device is placed on ground 7, by vibration isolation object, be placed in vibration-isolating platform 1 as precision type instrument or vehicle driver etc., when ground 7 is subject to exciting force, do the used time, by the vibration isolation of this device, can effectively reduce 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 quiet rigidity.Magnet 4 and magnet 5 homopolarity opposing parallel are placed, and when vibration occurs magnet 5 under dynamic exciting, magnet 5 departs from equipoise x, and it is F that magnet 5 is subject to 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
3with the opposite direction of spring force, if the rigidity of spring is regarded as to the positive rigidity of system, repulsive force shows as the negative stiffness of system.Therefore the dynamic stiffness of system is less, thereby realizes the isolation of lower frequency vibration, and simple in structure, cost is low.Two magnet spacings can regulate by threaded stem, close along with two magnet spacings, and the absolute value of negative stiffness increases, and when reaching total dynamic rate of certain numerical value system, is 0, and therefore dynamic rate of the present invention easily regulates.
Claims (5)
1. a passive vibration isolation device that is applicable to 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, the first magnet is installed in shell lateral body, the first spring is installed in housing main body, the second spring, the second magnet, the 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, the first spring is arranged between the second magnet and housing main body upper end inwall and is placed on vibration-isolating platform, the second spring is arranged between the second magnet and housing main body lower end inwall.
2. a kind of passive vibration isolation device that is applicable to low-frequency vibration according to claim 1, it is characterized in that: in shell lateral body, slide block is set, the first magnet is fixed on slide block, screw rod is installed on slide block, on shell lateral body, tapped hole is set, screw rod passes tapped hole and slide block, thereby controls position adjusting first magnet of slide block and the distance of the second magnet by adjusting screw rod.
3. a kind of passive vibration isolation device that is applicable to low-frequency vibration according to claim 1 and 2, it is characterized in that: between the second magnet and housing main body inwall, contact, thereby in the process moving up and down at the second magnet in the second magnet and housing main body wall friction produce damping.
4. a kind of passive vibration isolation device that is applicable to low-frequency vibration according to claim 1 and 2, is characterized in that: on housing main body inwall, guide groove is set, on the second magnet, guide block is set, the second magnet moves up and down along guide groove by guide block.
5. a kind of passive vibration isolation device that is applicable to low-frequency vibration according to claim 3, is characterized in that: on housing main body inwall, guide groove is set, on the second magnet, guide block is set, the second magnet moves up and down along guide groove by guide block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410078384.9A CN103939520B (en) | 2014-03-05 | 2014-03-05 | A kind of passive vibration isolation device being applicable to low-frequency vibration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410078384.9A CN103939520B (en) | 2014-03-05 | 2014-03-05 | A kind of passive vibration isolation device being applicable to low-frequency vibration |
Publications (2)
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| CN103939520A true CN103939520A (en) | 2014-07-23 |
| CN103939520B CN103939520B (en) | 2016-01-27 |
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| CN201410078384.9A Active 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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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104763765A (en) * | 2015-04-10 | 2015-07-08 | 山东大学 | Novel high static and low dynamic rigidity piecewise linear vibration isolator and work method thereof |
| CN105402297A (en) * | 2014-08-14 | 2016-03-16 | 香港理工大学 | Magnetic negative stiffness damper |
| CN105805204A (en) * | 2016-03-29 | 2016-07-27 | 石翔 | Passive linear magnetic negative stiffness device |
| CN108223970A (en) * | 2018-01-25 | 2018-06-29 | 福建省南安市天威消防设备有限公司 | A kind of anti-collision type ground fire 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 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110410443B (en) * | 2019-08-05 | 2020-08-14 | 北京航空航天大学 | Zero-rigidity impact isolation device |
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| FR1598856A (en) * | 1968-03-19 | 1970-07-06 | ||
| JPH0642585A (en) * | 1992-07-23 | 1994-02-15 | Showa Electric Wire & Cable Co Ltd | Active vibration isolation device |
| 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 |
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2014
- 2014-03-05 CN CN201410078384.9A patent/CN103939520B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| FR1598856A (en) * | 1968-03-19 | 1970-07-06 | ||
| JPH0642585A (en) * | 1992-07-23 | 1994-02-15 | Showa Electric Wire & Cable Co Ltd | Active vibration isolation device |
| 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 (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105402297A (en) * | 2014-08-14 | 2016-03-16 | 香港理工大学 | Magnetic negative stiffness damper |
| CN104763765A (en) * | 2015-04-10 | 2015-07-08 | 山东大学 | Novel high static and low dynamic rigidity piecewise linear vibration isolator and work method thereof |
| 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 |
| CN105805204A (en) * | 2016-03-29 | 2016-07-27 | 石翔 | Passive linear magnetic negative stiffness device |
| CN108223970A (en) * | 2018-01-25 | 2018-06-29 | 福建省南安市天威消防设备有限公司 | A kind of anti-collision type ground fire hydrant |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103939520B (en) | 2016-01-27 |
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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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