First-order buoyancy magnetic liquid damping vibration absorber for magnetic shielding

A magnetic liquid, magnetic shielding technology, applied in the direction of shock absorber, shock absorber, spring/shock absorber, etc., can solve the problems of difficult flow of magnetic liquid, low viscous energy consumption efficiency, large mass, etc., to avoid flow Difficult problems, improved centering effect, effect of various shapes

Inactive Publication Date: 2017-05-17
BEIJING JIAOTONG UNIV
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Problems solved by technology

[0013] The technical problem to be solved by the present invention is that the current magnetic liquid damping shock absorber has difficulty in the flow of the magnetic liquid due to various structural defects, the permanent magnet is easily broken, the centering effect is not good, the viscous energy consumption efficiency is not high, and the quality is large and other problems, making it impossible to be applied in engineering practice

Method used

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  • First-order buoyancy magnetic liquid damping vibration absorber for magnetic shielding

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Embodiment Construction

[0025] The present invention will be further described with accompanying drawing as specific embodiment:

[0026] A first-order buoyancy principle magnetic liquid shock absorber with double cone angle, such as figure 1 , the vibration damping device includes: a housing 1 , an upper shield 2 , an upper permanent magnet 3 , a mass 4 , a lower permanent magnet 5 , a lower shield 6 and a magnetic liquid 7 .

[0027] Connections between the parts making up the device:

[0028] The upper shield 2 is an inverted "concave" structure, and the upper surface of the upper permanent magnet 3 is installed in the groove of the upper shield 2 and fixedly connected. The lower shield 6 is an upright "concave" shape structure, and the lower surface of the lower permanent magnet 5 is installed in the groove of the lower shield 6 and fixedly connected.

[0029] The housing 1 is a thin-walled cavity structure, and the upper surface of the upper shield 2 equipped with the upper permanent magnet 3 ...

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Abstract

The invention discloses a first-order buoyancy magnetic liquid damping vibration absorber for magnetic shielding, and belongs to the field of mechanical engineering vibration. The problem that existing magnetic liquid damping vibration absorbers cannot be applied in engineering practice due to various structural problems is successfully solved. The first-order buoyancy magnetic liquid damping vibration absorber comprises a shell (1), an upper shielding cover (2), an upper permanent magnet (3), a mass block (4), a lower permanent magnet (5), a lower shielding cove (6) and magnetic liquid (7). When external vibration is produced, the mass block (4) moves in the upper shielding cover and the lower shielding cover, the magnetic liquid (7) flows in the gap between the upper and lower permanent magnets and the mass block (4), and therefore energy is absorbed to achieve the vibration absorption purpose; and a frequency difference is formed between the mass block (4) and the shell (1) due to first-order buoyancy formed by the upper permanent magnet (3) and the lower permanent magnet (5) inside the magnetic liquid (7), and the vibration absorption efficiency reaches the maximum.

Description

technical field [0001] The invention belongs to the field of mechanical engineering vibration. Background technique [0002] The magnetic liquid damping shock absorber is a passive shock absorber with high sensitivity to inertial force, and has the advantages of simple structure, small size, large energy consumption and long life. Due to the special operating environment of the spacecraft, its own volume, weight and energy carried are limited to a certain extent, so the magnetic liquid damping shock absorber is very suitable for the low-frequency, small-amplitude vibration reduction of long straight objects in large spacecraft, such as The solar panels and antennas of the space station also have broad application prospects on the ground, such as the vibration reduction of high-power antennas up to 100 meters long, the vibration reduction of precision balances, and so on. However, the existing magnetic liquid damping shock absorbers cannot be applied in engineering practice ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16F9/53F16F9/32
CPCF16F9/535F16F9/3207
Inventor 李德才姚杰黄串
Owner BEIJING JIAOTONG UNIV
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