CN104235248A - Magnetic liquid damping absorber containing sand clock shaped nonmagnetic inertia block - Google Patents
Magnetic liquid damping absorber containing sand clock shaped nonmagnetic inertia block Download PDFInfo
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- CN104235248A CN104235248A CN201410375378.XA CN201410375378A CN104235248A CN 104235248 A CN104235248 A CN 104235248A CN 201410375378 A CN201410375378 A CN 201410375378A CN 104235248 A CN104235248 A CN 104235248A
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- inertial mass
- permanent magnet
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Abstract
The invention discloses a magnetic liquid damping absorber containing a sand clock shaped nonmagnetic inertia block, which is suitable for vibration damping of longer objects in a space vehicle. The magnetic liquid damping absorber comprises a nonmagnetic shell (1), an annular permanent magnet (2), magnetic liquid (3), a nonmagnetic inertia block (4), a circumferential through hole (5), an axial through hole (6), an O-shaped sealing ring (7), an end cover (8), an inner locating ring (9) and an end face locating ring (10), which are connected; the inner locating ring (9) and the nonmagnetic inertia block (4) are respectively arranged in the nonmagnetic shell (1), and then the annular permanent magnet (2) coated with the magnetic liquid (3) at the inner wall and the end face locating ring (10) are introduced in sequence, and the end face of the nonmagnetic shell (1) is sealed by the end cover (8) including the O-shaped sealing ring (7). The nonmagnetic inertia block (4) is sand clock shaped and has adjustable weight and a relatively larger contact surface with the magnetic liquid (3) coated on the inner wall of the annular permanent magnet (2), and the vibration damping effect is remarkable.
Description
Technical field
The present invention relates to a kind of magnetic fluid damper containing hourglass-shaped non-magnetic inertial mass, be applicable to the vibration damping compared with long materials in astrovehicle.
Background technique
Magnetic liquid vibration damping is a kind of novel vibration damping mode, higher to the susceptibility of inertial force, and has that structure is simple, volume is little, power consumption is large and the advantage such as the life-span is long, can meet some the local vibration damping demands existed in astrovehicle.In astrovehicle some comparatively long materials (as solar energy sailboard, satellite antenna etc.) in application process, there is localized vibration problem, this kind of localized vibration often shows the feature that frequency is low, displacement is little and acceleration is little.Compare magnetic fluid damper, other vibration damping mode is difficult to meet the demands.
A common class magnetic fluid damper applying for a patent as publication number CN102032304A, this vibration damper comprises non-magnetic shell, magnetic liquid, permanent magnet, nut, end cap, bolt, screw, sealing gasket and O RunddichtringO.Permanent magnet is loaded in non-magnetic outer shell cavity, with screw bolt and nut, the end cap with O RunddichtringO is fixed on non-magnetic shell one end, in non-magnetic outer shell cavity, fills magnetic liquid by tapped hole, with screw and sealing gasket sealing.In energy dissipation process, relative movement between permanent magnet and shell causes primarily of the inertial force of permanent magnet, such vibration damper relies on the inertial force of permanent magnet to make to produce relative movement between permanent magnet and non-magnetic shell, make the magnetic liquid in non-magnetic shell flow through annular space between permanent magnet and non-magnetic shell, consumed energy by the viscous force of magnetic liquid.Publication number CN102042359A applies for a patent on the basis of applying for a patent of publication number CN102032304A, and in cylindrical permanent magnet body, axial uniform 4 ~ 8 through holes, strengthen its damping capacity with this.This type of vibration damper is immersed in magnetic liquid completely due to permanent magnet, and cylindrical permanent magnets two ends are magnetic liquid, and make its sensitivity be subject to the restriction of magnetic liquid viscous force, effectiveness in vibration suppression is relatively poor, and in application process, energy dissipation is limited.
The proportion of the corresponding cylindrical permanent magnets of such magnetic fluid damper is relatively large, and two ends pole polarity is comparatively strong, and circumferential surface magnetic is relatively weak, and effective friction surface of corresponding coated magnetic liquid is relatively little.For the cylindrical permanent magnets of the corresponding large magnetic intensity of large quality, the limited effective friction surface of cylinder permanent magnet makes it cannot improve its energy consumption by increasing physical dimension.
Summary of the invention
Technical problem to be solved by this invention is, a kind of magnetic fluid damper containing hourglass-shaped non-magnetic inertial mass is provided, avoid the physical dimension of magnetic fluid damper and effectiveness in vibration suppression to be subject to the quantitative limitation of permanent magnet matter, solve the vibration damping problem compared with long materials in astrovehicle.
The technological scheme that technical solution problem of the present invention adopts is:
A magnetic fluid damper containing hourglass-shaped non-magnetic inertial mass, this device comprises non-magnetic housing, annular permanent magnet, magnetic liquid, non-magnetic inertial mass, circumferential through-hole, axial hole, O RunddichtringO, end cap, inner position ring, end face positioning ring; Connection between above-mentioned each assembly: inner position ring and non-magnetic inertial mass are imported from non-magnetic housing port successively, be positioned over the intermediate portion of non-magnetic housing, the annular permanent magnet that inwall is coated with magnetic liquid is imported respectively again from non-magnetic housing two ends, then end face positioning ring is imported, non-magnetic housing two ends adopt the sealing of O type circle, and carry out end face by end cap and fix.
The operational module of the non-magnetic inertial mass adopted is hourglass-shaped, is connected continuously between two operational modules.The axial centre point of this operational module is positioned on the cross section at annular permanent magnet axial centre point place, and the angular range of the projection line of this operational module working surface on shaft section and axis is: 1 ° ~ 15 °.This operational module end face external diameter is less than the internal diameter of annular permanent magnet, makes its end face can pass in the middle of annular permanent magnet like this.In addition, in order to make this operational module not depart from from annular permanent magnet under inertial force effect, then the external diameter of the middle connecting cylinder of non-magnetic inertial mass is greater than the internal diameter of annular permanent magnet.
Non-magnetic enclosure interior is divided into three sections of cavitys sealed by the annular permanent magnet that two are coated with magnetic liquid, in order to increase the sensitivity that non-magnetic inertial mass responds inertial force, avoid by the impact of sealing gas on inertial force suffered by non-magnetic inertial mass, spy axially has axial hole in non-magnetic inertial mass, have in the middle connecting cylinder section circumference of non-magnetic inertial mass and be symmetrically distributed with circumferential through-hole, and axial hole and circumferential through-hole are interconnected, three sections of Seal cages are made to be a connected component.In addition, the axial hole of non-magnetic inertial mass has the effect regulating non-magnetic inertial mass sole mass, and the aperture of corresponding axial hole and the ratio range of non-magnetic inertial mass end face external diameter are: 0.2 ~ 0.5.
The present invention compares had beneficial effect with prior art:
Compare common magnetic fluid damper, the permanent magnet of this vibration damper and non magnetic housing consolidation, non-magnetic inertial mass is adopted to respond inertial force, quality and the circumferential surface of non-magnetic inertial mass are adjustable, improving the power consumption level of vibration damper as required by increasing physical dimension, making the physical dimension of magnetic fluid damper and effectiveness in vibration suppression not be subject to the quantitative limitation of permanent magnet matter.In addition, the non-magnetic inertial mass that this vibration damper adopts is hour-glass in shape, can ensure that the equilibrium position of non-magnetic inertial mass is constant all the time, add the stability of vibration damper.The external diameter of the middle connecting cylinder section of non-magnetic inertial mass is greater than the internal diameter of annular permanent magnet, with non-magnetic inertial mass not landing from annular permanent magnet under ensureing inertial force effect, thus enhances the reliability of vibration damper.
Accompanying drawing explanation
Fig. 1 is structure principle chart of the present invention.
Fig. 2 is the A-A sectional drawing of Fig. 1.
1. non-magnetic housing, 2. annular permanent magnet, 3. magnetic liquids, 4. non-magnetic inertial mass, 5. circumferential through-hole, 6. axial hole in figure, 7.O RunddichtringO, 8. end cap, 9. inner position ring, 10. end face positioning ring.
Embodiment
A magnetic fluid damper containing hourglass-shaped non-magnetic inertial mass, this device comprises non-magnetic housing (1), annular permanent magnet (2), magnetic liquid (3), non-magnetic inertial mass (4), circumferential through-hole (5), axial hole (6), O RunddichtringO (7), end cap (8), inner position ring (9), end face positioning ring (10).Connection between each part mentioned above: first inner position ring (9) and non-magnetic inertial mass (4) are imported from non-magnetic housing (1) port successively, be positioned over the intermediate portion of non-magnetic housing (1), the coated annular permanent magnet (2) of magnetic liquid (3) of inwall is imported again respectively from non-magnetic housing two ends, then end face positioning ring (10) is imported, non-magnetic housing (1) two ends adopt O RunddichtringO (7) sealing, and are carried out end face fixed by end cap (8).
The operational module of non-magnetic inertial mass (4) is hourglass-shaped, and the projection line on its corresponding shaft cross section and the angle of axis are 5 °.Non-magnetic inertial mass (4) end face diameter is 29.6mm, and the internal diameter of annular permanent magnet is 30mm.The diameter of the middle connecting cylinder section of non-magnetic inertial mass (4) is 31mm.The aperture of the axial hole (6) of non-magnetic inertial mass (4) is 10mm, and the aperture of circumferential through-hole (5) is 6mm.Magnetic liquid (2) used is ester group magnetic liquid, and non-magnetic housing (1) and non-magnetic inertial mass (4) material used are aluminum alloy, and annular permanent magnet (2) material used is neodymium iron boron.
Claims (7)
1. the magnetic fluid damper containing hourglass-shaped non-magnetic inertial mass, this device comprises non-magnetic housing (1), annular permanent magnet (2), magnetic liquid (3), non-magnetic inertial mass (4), circumferential through-hole (5), axial hole (6), O RunddichtringO (7), end cap (8), inner position ring (9), end face positioning ring (10).Connection between above-mentioned each assembly:
Inner position ring (9) and non-magnetic inertial mass (4) is loaded successively from the port of non-magnetic housing (1), and be positioned over the intermediate portion of non-magnetic housing (1), the annular permanent magnet (2) that inwall is coated with magnetic liquid (3) is imported respectively again from non-magnetic housing (1) two ends, end face positioning ring (10) is imported respectively from non-magnetic housing (1) two ends, non-magnetic housing (1) two ends adopt O RunddichtringO (7) sealing, and are carried out end face fixed by end cap (8).
It is characterized in that: annular permanent magnet (2) and non-magnetic housing (1) consolidation, its inwall is coated with magnetic liquid (3); Non-magnetic inertial mass (4) is hour-glass in shape, through the axle center of annular permanent magnet (2), and magnetic liquid (3) and its peripheral surface contacts.
2. a kind of magnetic fluid damper containing hourglass-shaped non-magnetic inertial mass according to claim 1, is characterized in that described non-magnetic inertial mass (4) is containing two hourglass-shaped operational modules, is connected continuously.
3. the operational module of non-magnetic inertial mass (4) according to claim 2, is characterized in that the angular range of the projection line of this operational module circumferential surface on shaft section and axis is: 1 ° ~ 15 °.
4. the operational module of non-magnetic inertial mass (4) according to claim 2, is characterized in that the end face external diameter of this operational module is less than the internal diameter of annular permanent magnet (2), and gap size scope is therebetween: 0.2mm ~ 0.5mm.
5. the operational module of non-magnetic inertial mass (4) according to claim 2, is characterized in that the external diameter of two operational module joint cylinders is greater than the internal diameter of annular permanent magnet (2).
6. a kind of magnetic fluid damper containing hourglass-shaped non-magnetic inertial mass according to claim 1, it is characterized in that the axis of described non-magnetic inertial mass (4) has axial hole (6), the ratio range of through-hole aperture and non-magnetic inertial mass (4) end face external diameter is: 0.2 ~ 0.5.
7. a kind of magnetic fluid damper containing hourglass-shaped non-magnetic inertial mass according to claim 1, it is characterized in that described non-magnetic inertial mass (4) middle column circumferential surface is symmetrically distributed with circumferential through-hole (5), circumferential through-hole (5) and axial hole (6) are interconnected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410375378.XA CN104235248B (en) | 2014-08-01 | 2014-08-01 | A kind of magnetic fluid damper containing hourglass-shaped non-magnetic inertial mass |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410375378.XA CN104235248B (en) | 2014-08-01 | 2014-08-01 | A kind of magnetic fluid damper containing hourglass-shaped non-magnetic inertial mass |
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| Publication Number | Publication Date |
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| CN104235248A true CN104235248A (en) | 2014-12-24 |
| CN104235248B CN104235248B (en) | 2016-02-10 |
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| CN201410375378.XA Expired - Fee Related CN104235248B (en) | 2014-08-01 | 2014-08-01 | A kind of magnetic fluid damper containing hourglass-shaped non-magnetic inertial mass |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112196926A (en) * | 2020-10-23 | 2021-01-08 | 清华大学 | Magnetic liquid damping vibration absorber |
| CN112196923A (en) * | 2020-10-22 | 2021-01-08 | 清华大学 | Magnetic liquid damping shock absorber based on second-order buoyancy principle |
| CN112196925A (en) * | 2020-10-23 | 2021-01-08 | 清华大学 | Magnetic liquid damping vibration absorber |
| CN113108064A (en) * | 2021-04-29 | 2021-07-13 | 北京交通大学 | Modularized magnetic liquid sealing device |
| CN114542638A (en) * | 2022-03-11 | 2022-05-27 | 华北水利水电大学 | Magnetic liquid 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 |
| CN114542638B (en) * | 2022-03-11 | 2024-07-30 | 华北水利水电大学 | Magnetic liquid damping shock absorber |
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| RU2004122664A (en) * | 2004-07-23 | 2006-01-20 | Федеральное государственное унитарное предпри тие НАУЧНО-ИССЛЕДОВАТЕЛЬСКИЙ ИНСТИТУТ МАШИНОСТРОЕНИЯ (RU) | MAGNETO-LIQUID SHAFT |
| RU2007112380A (en) * | 2007-04-03 | 2008-10-10 | Государственное образовательное учреждение высшего профессионального образовани "Ивановский энергетический университет им. В.И. Ленина" (RU) | MAGNET-LIQUID SYSTEM WITH AN INCREASED RESOURCE OF WORK |
| CN102032304A (en) * | 2010-12-29 | 2011-04-27 | 北京交通大学 | Magnetic fluid damping device |
| CN102042359A (en) * | 2011-01-19 | 2011-05-04 | 北京交通大学 | Magnetic liquid damping device |
| CN103122960A (en) * | 2013-02-08 | 2013-05-29 | 北京交通大学 | Magnetic liquid damp shock absorber |
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2014
- 2014-08-01 CN CN201410375378.XA patent/CN104235248B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2004122664A (en) * | 2004-07-23 | 2006-01-20 | Федеральное государственное унитарное предпри тие НАУЧНО-ИССЛЕДОВАТЕЛЬСКИЙ ИНСТИТУТ МАШИНОСТРОЕНИЯ (RU) | MAGNETO-LIQUID SHAFT |
| RU2007112380A (en) * | 2007-04-03 | 2008-10-10 | Государственное образовательное учреждение высшего профессионального образовани "Ивановский энергетический университет им. В.И. Ленина" (RU) | MAGNET-LIQUID SYSTEM WITH AN INCREASED RESOURCE OF WORK |
| CN102032304A (en) * | 2010-12-29 | 2011-04-27 | 北京交通大学 | Magnetic fluid damping device |
| CN102042359A (en) * | 2011-01-19 | 2011-05-04 | 北京交通大学 | Magnetic liquid damping device |
| CN103122960A (en) * | 2013-02-08 | 2013-05-29 | 北京交通大学 | Magnetic liquid damp shock absorber |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112196923A (en) * | 2020-10-22 | 2021-01-08 | 清华大学 | Magnetic liquid damping shock absorber based on second-order buoyancy principle |
| CN112196926A (en) * | 2020-10-23 | 2021-01-08 | 清华大学 | Magnetic liquid damping vibration absorber |
| CN112196925A (en) * | 2020-10-23 | 2021-01-08 | 清华大学 | Magnetic liquid damping vibration absorber |
| CN112196926B (en) * | 2020-10-23 | 2021-08-17 | 清华大学 | Magnetic liquid damping vibration absorber |
| CN112196925B (en) * | 2020-10-23 | 2021-08-20 | 清华大学 | Magnetic liquid damping vibration absorber |
| CN113108064A (en) * | 2021-04-29 | 2021-07-13 | 北京交通大学 | Modularized magnetic liquid sealing device |
| CN113108064B (en) * | 2021-04-29 | 2022-03-25 | 北京交通大学 | Modularized magnetic liquid sealing device |
| CN114542638A (en) * | 2022-03-11 | 2022-05-27 | 华北水利水电大学 | Magnetic liquid damping shock absorber |
| CN114542638B (en) * | 2022-03-11 | 2024-07-30 | 华北水利水电大学 | Magnetic liquid 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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|---|---|
| CN104235248B (en) | 2016-02-10 |
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