CN102032304A - Magnetic fluid damping device - Google Patents
Magnetic fluid damping device Download PDFInfo
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- CN102032304A CN102032304A CN 201010611854 CN201010611854A CN102032304A CN 102032304 A CN102032304 A CN 102032304A CN 201010611854 CN201010611854 CN 201010611854 CN 201010611854 A CN201010611854 A CN 201010611854A CN 102032304 A CN102032304 A CN 102032304A
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Abstract
The invention relates to a magnetic fluid damping device, which is suitable for damping long objects in spacecrafts and solves the problem of the damping of the long objects in the spacecrafts. The device comprises a non-magnetic shell (2), magnetic liquid (3), a permanent magnet (4), a nut (5), an end cover (6), a bolt (7), a screw (9), a sealing gasket (10) and an O-shaped seal ring (11). The parts are connected in a way that: the permanent magnet (4) is arranged in the non-magnetic shell (2); the end cover (6) with the O-shaped seal ring (11) is fixed to one end of the non-magnetic shell (2) by the bolt (7) and the nut (5); the magnetic liquid (3) is filled into the non-magnetic shell (2) by a threaded hole (8); and the non-magnetic shell (2) is sealed by the screw (9) and the sealing gasket (10). The device is sensitive to inertia force, can perform damping on the vibration with the characteristics of low frequency, small displacement and low accelerated speed, and has long service life and simple assembly method.
Description
Technical field
The present invention relates to a kind of vibration damping structure member, be applicable in the astrovehicle vibration damping than long materials.
Background technique
The magnetic liquid vibration damping is a kind of novel vibration damping form, and is very responsive to inertial force.In spacecraft, because the restriction of its special working environment and the energy, volume, weight, require its vibration damper volume little, in light weight and reliability is high.Have many local vibration damping problems than long materials (as solar energy sailboard, satellite antenna etc.) in astrovehicle, these vibrations than long materials have the feature that frequency is low, displacement is little, acceleration is little.At vibration, require the vibration damper must be very responsive to inertial force with this feature.Other vibration damping modes are difficult to reach requirement.
Summary of the invention
The technical issues that need to address of the present invention are, a kind of magnetic liquid vibration damping equipment that is applicable in the astrovehicle than the long materials vibration damping is provided.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of magnetic liquid vibration damping equipment, this device is made up of non-magnetic conductive shell, magnetic liquid, permanent magnet, nut, end cap, bolt, screw, sealing gasket and O RunddichtringO.
Connection between the above-mentioned part:
Permanent magnet is packed in the non-magnetic conductive shell chamber, and the end cap that will have the O RunddichtringO with screw bolt and nut is fixed on non-magnetic conductive shell one end;
In non-magnetic conductive shell chamber, fill with magnetic liquid by tapped hole, seal with screw, sealing gasket.
Described permanent magnet is shaped as a pipe, and its dimensional parameters is: the internal diameter ratio in the external diameter of pipe and non-magnetic conductive shell chamber is 0.5～0.75, and the thickness of pipe is 0.20mm～0.35mm, and length and non-magnetic conductive shell length ratio are 0.25～0.75.
Described magnetic liquid is dibasic acid esters based magnetic liquid, water-base magnetic liquid, machine oil based magnetic liquid or keryl magnetic liquid.Magnetic liquid is pollution-free, and volatility is low, has good flowability, and long service life is suitable for long-term use.
The invention has the beneficial effects as follows:
According to being suspended in the magnetic liquid from the suspension theory permanent magnet, the magnetic field around the permanent magnet is symmetrically distributed, so the pressure in the magnetic liquid is symmetrically distributed, owing to be to use in weightless situation, permanent magnet is in the central position, the permanent magnet stress balance.If vibration makes the permanent magnet Off center, the symmetry properties of permanent magnet is just destroyed, and magnetic liquid produces restoring force to permanent magnet.If housing is done the double vibrations or the whirling vibration of acceleration change, corresponding motion is done in the inertial force effect meeting that permanent magnet is changed in magnetic liquid, utilize the viscosity of magnetic liquid and magnetic liquid and permanent magnet to rub, thereby mechanical energy dissipative is fallen, reach effectiveness in vibration suppression.
The magnetic liquid vibration damping equipment is in the vibration damping process, and its inner vibrational energy is mainly dissipated by following four approach: one, permanent magnet is in the chamber of non-magnetic conductive shell during to-and-fro motion and the friction between the magnetic liquid; Comprise magnetic liquid that is adsorbed and the magnetic liquid that is not adsorbed.Two, the magnetic liquid that is adsorbed by permanent magnet can produce resiliently deformable, consumed energy when vibration.Three, the magnetic liquid that a part is adsorbed by permanent magnet in the chamber is along with permanent magnet moves, and is not adsorbed the magnetic liquid friction that is under the free-flowing, consumed energy in the chamber.When four, the magnetic liquid that is not adsorbed by permanent magnet flows and the friction between the shell, consumed energy.。
In spacecraft, because the restriction of its special working environment and condition and the energy, volume, weight; Require its vibration damper volume little, in light weight and reliability is high.And,, at vibration, require the vibration damper must be very responsive to inertial force with this feature.
The present invention is based on the magnetic liquid vibration damping equipment of magnetic liquid from suspension theory, can satisfy just that the vibration than long materials has the such requirement of feature that frequency is low, displacement is little, acceleration is little in the astrovehicle.And having does not need the external world that advantages such as energy, life-span length are provided.
Description of drawings
Fig. 1 is magnetic liquid damping device structure figure.
Fig. 2 is the A-A sectional view of Fig. 1.
Among the figure: through hole 1, non-magnetic conductive shell 2, magnetic liquid 3, permanent magnet 4, nut 5, end cap 6, bolt 7, screw 9, sealing gasket 10, O RunddichtringO 11.
Embodiment
With the accompanying drawing is that the invention will be further described for embodiment:
Mode of execution one
A kind of magnetic liquid vibration damping equipment, this device is made up of non-magnetic conductive shell 2, magnetic liquid 3, permanent magnet 4, nut 5, end cap 6, bolt 7, screw 9, sealing gasket 10 and O RunddichtringO 11.
Connection between the above-mentioned part:
In non-magnetic conductive shell 2 chambeies, fill with magnetic liquid 3 by tapped hole 8, seal with screw 9, sealing gasket 10.
Described permanent magnet 4 is shaped as a pipe, and its dimensional parameters is: the internal diameter ratio in the external diameter of pipe and non-magnetic conductive shell 2 chambeies is 0.5, and the thickness of pipe is 0.20mm, and length and non-magnetic conductive shell 2 length ratios are 0.25.
Described magnetic liquid 3 is the dibasic acid esters based magnetic liquid.
Mode of execution two
Mode of execution two is that the external diameter of pipe and the internal diameter ratio in non-magnetic conductive shell 2 chambeies are 0.75 with the difference of mode of execution one, and the thickness of pipe is 0.35mm, and length and non-magnetic conductive shell 2 length ratios are 0.75.
Described magnetic liquid 3 is a water-base magnetic liquid.
Mode of execution three
Mode of execution three is that the external diameter of pipe and the internal diameter ratio in non-magnetic conductive shell 2 chambeies are 0.6 with the difference of mode of execution one, and the thickness of pipe is 0.25mm, and length and non-magnetic conductive shell 2 length ratios are 0.5.
Described magnetic liquid 3 is machine oil based magnetic liquid or keryl magnetic liquid.
Through hole 1 be for linked to each other by the device of vibration damping and design.
Tapped hole 8 is that magnetic liquid injects and designs for convenience.
The material of screw 9, non-magnetic conductive shell 2 and end cap 6 is 1Cr18Ni9Ti.
The present invention is applicable to many local vibration dampings than long materials (as solar energy sailboard, satellite antenna etc.) in the spacecraft.
Claims (3)
1. magnetic liquid vibration damping equipment is characterized in that:
This device is made up of non-magnetic conductive shell (2), magnetic liquid (3), permanent magnet (4), nut (5), end cap (6), bolt (7), screw (9), sealing gasket (10) and O RunddichtringO (11);
Connection between the above-mentioned part:
Permanent magnet (4) is packed in non-magnetic conductive shell (2) chamber, and the end cap (6) that will have O RunddichtringO (11) with bolt (7) and nut (5) is fixed on non-magnetic conductive shell (2) one ends;
In non-magnetic conductive shell (2) chamber, fill with magnetic liquid (3) by tapped hole (8), seal with screw (9), sealing gasket (10).
2. magnetic liquid vibration damping equipment according to claim 1, it is characterized in that: described permanent magnet (4) is shaped as a pipe, its dimensional parameters is: the internal diameter ratio in the external diameter of pipe and non-magnetic conductive shell (2) chamber is 0.5～0.75, the thickness of pipe is 0.20mm～0.35mm, and length and non-magnetic conductive shell (2) length ratio are 0.25～0.75.
3. magnetic liquid vibration damping equipment according to claim 1 is characterized in that:
Described magnetic liquid (3) is dibasic acid esters based magnetic liquid, water-base magnetic liquid, machine oil based magnetic liquid or keryl magnetic liquid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010611854A CN102032304B (en) | 2010-12-29 | 2010-12-29 | Magnetic fluid damping device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010611854A CN102032304B (en) | 2010-12-29 | 2010-12-29 | Magnetic fluid damping device |
Publications (2)
| Publication Number | Publication Date |
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| CN102032304A true CN102032304A (en) | 2011-04-27 |
| CN102032304B CN102032304B (en) | 2012-09-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201010611854A Expired - Fee Related CN102032304B (en) | 2010-12-29 | 2010-12-29 | Magnetic fluid damping device |
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Cited By (29)
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|---|---|---|---|---|
| CN102213285A (en) * | 2011-06-14 | 2011-10-12 | 北京交通大学 | Magnetic liquid damping vibration attenuation device |
| CN102494070A (en) * | 2011-12-23 | 2012-06-13 | 北京交通大学 | Magnetic liquid damping vibration attenuating device |
| CN102537167A (en) * | 2011-12-31 | 2012-07-04 | 北京交通大学 | Magnetic liquid vibration-reduction device |
| CN103122964A (en) * | 2013-02-08 | 2013-05-29 | 北京交通大学 | Magnetic liquid damping vibration reduction device |
| CN103122960A (en) * | 2013-02-08 | 2013-05-29 | 北京交通大学 | Magnetic liquid damp shock absorber |
| CN103122965A (en) * | 2013-02-08 | 2013-05-29 | 北京交通大学 | Magnetic liquid damping vibration attenuating device |
| CN104074903A (en) * | 2014-06-30 | 2014-10-01 | 北京交通大学 | Magnetic liquid damping shock absorber with arc-shaped inner wall axial section |
| CN104141730A (en) * | 2014-06-30 | 2014-11-12 | 北京交通大学 | Magnetic fixed type magnetic liquid damping shock absorber |
| CN104235248A (en) * | 2014-08-01 | 2014-12-24 | 北京交通大学 | Magnetic liquid damping absorber containing sand clock shaped nonmagnetic inertia block |
| CN104265817A (en) * | 2014-08-01 | 2015-01-07 | 北京交通大学 | Magnetic liquid damping shock absorber containing spherical crown surface non-magnetic conductive inertia block |
| CN104565183A (en) * | 2014-11-25 | 2015-04-29 | 北京交通大学 | Magnetic liquid damping shock absorber with magnetic plane |
| CN104613120A (en) * | 2015-01-23 | 2015-05-13 | 北京交通大学 | Magnetic fluid damping vibration absorber based on inner cone angle |
| CN104613121A (en) * | 2015-01-26 | 2015-05-13 | 北京交通大学 | Outer taper angle magnetic liquid damping absorber |
| CN104632981A (en) * | 2014-12-29 | 2015-05-20 | 北京交通大学 | Self-adaptation variable rigidity plane magnetic liquid damping shock absorber |
| CN104847826A (en) * | 2015-04-14 | 2015-08-19 | 北京交通大学 | Inner taper angle magnetic liquid damping shock absorber |
| CN104895983A (en) * | 2015-04-30 | 2015-09-09 | 北京交通大学 | Double-tapered-angle magnetic liquid shock absorber on basis of first-order buoyancy principle |
| CN104912994A (en) * | 2015-06-23 | 2015-09-16 | 北京交通大学 | Cylindrical first-order buoyancy magnetic liquid vibration absorber |
| CN104948627A (en) * | 2015-04-29 | 2015-09-30 | 北京交通大学 | First-order buoyancy principle based magnetic liquid damping shock absorber with magnetic shielding covers |
| CN106838089A (en) * | 2016-12-14 | 2017-06-13 | 北京交通大学 | A kind of underfill type magnetic liquid single order law of buoyancy shock absorber |
| CN112196923A (en) * | 2020-10-22 | 2021-01-08 | 清华大学 | Magnetic liquid damping shock absorber based on second-order buoyancy principle |
| CN112392891A (en) * | 2020-11-11 | 2021-02-23 | 清华大学 | Magnetic liquid vibration damper |
| CN112392884A (en) * | 2020-11-11 | 2021-02-23 | 清华大学 | Magnetic liquid shock absorber based on second-order buoyancy principle |
| CN112392887A (en) * | 2020-11-11 | 2021-02-23 | 清华大学 | Magnetic liquid vibration damper |
| CN112392888A (en) * | 2020-11-11 | 2021-02-23 | 清华大学 | Magnetic liquid vibration damper |
| CN112727973A (en) * | 2020-12-30 | 2021-04-30 | 清华大学 | Magnetic liquid vibration damper |
| CN113074209A (en) * | 2021-03-16 | 2021-07-06 | 广西科技大学 | Miniature magneto-rheological vibration damper |
| US11306795B1 (en) | 2020-11-11 | 2022-04-19 | Tsinghua University | Magnetic fluid damper |
| CN114542637A (en) * | 2022-02-28 | 2022-05-27 | 华北水利水电大学 | Damping shock absorber |
| CN114962514A (en) * | 2022-04-29 | 2022-08-30 | 北京交通大学 | Single-ball magnetic liquid collision damping shock absorber |
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| CN102494070A (en) * | 2011-12-23 | 2012-06-13 | 北京交通大学 | Magnetic liquid damping vibration attenuating device |
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| CN112196923A (en) * | 2020-10-22 | 2021-01-08 | 清华大学 | Magnetic liquid damping shock absorber based on second-order buoyancy principle |
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