An Electromagnetic Positive and Negative Stiffness Parallel Low Frequency Vibration Isolation Device

A positive and negative stiffness, electromagnetic technology, applied in non-rotational vibration suppression and other directions, can solve the problems that the stiffness cannot be adjusted online, which is not conducive to ultra-low frequency vibration isolation, and increases system damping, and achieves simple structure, reliable protection, and system damping. low effect

Active Publication Date: 2020-04-28
SHANGHAI UNIV
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Problems solved by technology

However, since both the positive and negative stiffnesses are provided by mechanical springs, once the installation is completed, the stiffness of the whole mechanism cannot be adjusted online; at the same time, due to the use of bearings, the damping of the system is increased, which is not conducive to ultra-low frequency vibration isolation

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  • An Electromagnetic Positive and Negative Stiffness Parallel Low Frequency Vibration Isolation Device
  • An Electromagnetic Positive and Negative Stiffness Parallel Low Frequency Vibration Isolation Device
  • An Electromagnetic Positive and Negative Stiffness Parallel Low Frequency Vibration Isolation Device

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Embodiment Construction

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0038] In the description of the present invention, it should be understood that the orientations or positional relationships indicated by the terms "upper", "lower", "left" and "right" are based on the orientations and positional relationships shown in the drawings, and are only for convenience of description It does not indicate or imply that the referred part must have a specific orientation and operate in a specific orientation, and thus should not be const...

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Abstract

The invention discloses an electromagnetic type positive and negative stiffness parallel low-frequency vibration isolation device. The device comprises a foundation platform, an electromagnetic suspension platform, a plurality of supports, center type negative stiffness mechanisms and an external power supply, wherein the electromagnetic suspension platform is fixedly connected with the foundationplatform, the plurality of supports are uniformly distributed along the axial direction of the electromagnetic suspension platform and are fixedly connected with the foundation platform, one center type negative stiffness mechanism is arranged between the electromagnetic suspension platform and each support, and the electromagnetic suspension platform is electrically connected with the external power supply. The device is simple in structure, on-line adjustable in rigidity, free of friction, low in system damping, capable of achieving low inherent frequency and inhibiting and isolating microvibration in the vertical direction, suitable for different cases, capable of effectively attenuating micro vibration in a large-frequency-band range and providing reliable guarantee for precision machining and measuring equipment in a micro-vibration environment.

Description

technical field [0001] The invention relates to the technical field of low-frequency vibration isolation and suppression devices, in particular to an electromagnetic positive and negative stiffness parallel low-frequency vibration isolation device. Background technique [0002] In most cases, isolating source vibrations with a vibration isolation system is the only means of reducing vibration hazards. Vibration isolation systems mainly include passive and active types. Commonly used passive vibration isolators (such as rubber vibration isolators, double-layer vibration isolators) are typical linear vibration isolation systems. This type of vibration isolation device can obtain a good vibration attenuation rate in the vibration-isolation frequency band where the excitation frequency is 1.4 times higher than the natural frequency of the system, but for low-frequency vibrations whose frequency is lower than the vibration-isolation frequency band, the vibration isolation system...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16F15/03
Inventor 蒲华燕赵晶雷孙翊王敏罗均杨毅彭艳谢少荣
Owner SHANGHAI UNIV
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