Magnetic negative stiffness mechanism

A technology of negative stiffness and magnetic yoke, which is applied in the field of magnetic negative stiffness mechanism, can solve the problems of difficult miniaturization, increase of cost, and restrictions on the wide application of air bearing vibration reduction, etc., and achieve good high-frequency vibration interference and isolation of ultra-low-frequency vibration Effect

Active Publication Date: 2012-12-05
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

[0003] The air bearing vibration reduction technology can make the shock absorber have an extremely low natural frequency, but the processing accuracy of the air bearing components is very high, and the installation requirements are also very strict, which increases the cost and restricts the air bearing vibrati

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Embodiment Construction

[0024] The magnetic pole part of the magnetic negative stiffness mechanism provided by the present invention adopts multiple groups of magnets arranged in parallel, and the magnetization directions of two adjacent magnets are opposite. Such a magnetic circuit arrangement constrains the magnetic force lines through the yoke, reduces magnetic flux leakage, and can improve the magnetic negative stiffness. body stiffness.

[0025] In the magnetic negative stiffness mechanism provided by the present invention, the negative stiffness can be adjusted by the negative stiffness adjusting part, which is used to match the stiffness of the positive stiffness spring connected in parallel with it, so as to adjust the stiffness of the shock absorber. Negative stiffness adjustment is achieved by adjusting the external magnet spacing.

[0026] The structure and working principle of specific embodiments of the present invention will be further described in detail below in conjunction with the a...

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Abstract

The invention provides a magnetic negative stiffness mechanism with a compact structure, and belongs to the field of ultra-precise vibration damping. The magnetic negative stiffness mechanism includes a frame part, a negative stiffness adjusting part, a flexible guiding part and a moving part. The negative stiffness mechanism utilizes the reverse repelling action of the magnet to form the negative stiffness characteristic, and the size of the negative stiffness can be adjusted through the negative stiffness adjusting part. As the ultra-low frequency vibration damper formed by combining the magnetic negative stiffness mechanism and the positive stiffness spring has extremely low dynamic stiffness, the inherent frequency of the ultra-low frequency vibration damper is greatly reduced, as a result, the vibration damper not only has excellent vibration isolation effect towards the high-frequency vibration interference, but also can effectively isolate the ultra-low frequency vibration, and the magnetic negative stiffness mechanism is applicable to the ultra-precise machining and measuring equipment sensitive to the vibration.

Description

technical field [0001] The invention belongs to the field of ultra-precision vibration reduction, and in particular relates to a magnetic negative stiffness mechanism. The magnetic negative stiffness mechanism involved in the present invention is compact in structure and has negative stiffness characteristics, and is connected in parallel with positive stiffness springs to form an ultra-precision shock absorber, which can realize ultra-low frequency vibration reduction. The positive and negative stiffness parallel shock absorber not only has a good vibration isolation effect on high-frequency vibration interference, but also can effectively isolate ultra-low-frequency vibration, and is suitable for ultra-precision processing and measuring equipment sensitive to low-frequency vibration. Background technique [0002] At present, in the field of high-end IC chip manufacturing and ultra-precision testing, the requirements for environmental micro-vibration isolation are becoming ...

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Application Information

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IPC IPC(8): F16F6/00
CPCF16F6/00F16F6/005F16F2228/063
Inventor 陈学东吴文江李小清徐振高
Owner HUAZHONG UNIV OF SCI & TECH
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