A non-contact electromagnetic quasi-zero stiffness vibration isolation device

By using a non-contact electromagnetic quasi-zero stiffness vibration isolation device, the problems of friction and wear and load adaptability of traditional devices are solved by adjusting electromagnetic repulsion and attraction, achieving a low-frequency vibration isolation effect with high stability and long life.

CN122305167APending Publication Date: 2026-06-30NAVAL AVIATION UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NAVAL AVIATION UNIV
Filing Date
2026-04-15
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

Traditional quasi-zero stiffness devices rely on contact structures such as mechanical springs and cams, which are prone to friction and wear, material fatigue, and cannot adapt to different weight loads. Furthermore, they have a short lifespan in aerospace and other scenarios, making it difficult to meet the requirements for high-precision vibration isolation.

Method used

A non-contact electromagnetic quasi-zero stiffness vibration isolation device is adopted. Through the coordinated design of positive and negative stiffness mechanisms, electromagnetic repulsion and attraction are adjusted to avoid mechanical contact, adapt to different weight loads, and achieve static stability and dynamic vibration isolation.

Benefits of technology

It improves the stability and lifespan of the device, can adapt to different weight loads, broadens the low-frequency vibration isolation bandwidth, avoids friction and wear, and meets the high-precision vibration isolation requirements of aerospace and other fields.

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Abstract

A non-contact electromagnetic quasi-zero stiffness vibration isolation device belongs to the field of vibration isolation technology. The device includes a positive stiffness mechanism and a negative stiffness mechanism directly above it. The positive stiffness mechanism includes a first eddy current stator and a permanent magnet mover, with the permanent magnet mover positioned directly above the first eddy current stator. Electromagnetic repulsion is generated between the first eddy current stator and the permanent magnet mover in the vertical direction. The negative stiffness mechanism includes a mover plate, with the permanent magnet mover fixedly connected to it. Two sets of second eddy current stators are located on the upper and lower sides of the mover plate, generating electromagnetic attraction between them and the mover plate in the vertical direction. Mechanical air gaps are provided between the first eddy current stator and the permanent magnet mover, and between the mover plate and the two sets of second eddy current stators. This non-contact electromagnetic action achieves stiffness adjustment, avoiding frictional losses caused by mechanical contact, reducing vibration interference sources, and making the operation smoother.
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