Horizontal two-degree-of-freedom electromagnetic vibration isolation device based on parallel connection of magnetic gravitational positive and negative stiffness

Abstract

The invention relates to a horizontal two-degree-of-freedom electromagnetic vibration isolation device based on parallel connection of magnetic gravitational positive and negative stiffness, and belongs to the technical field of precision vibration isolation. An X-direction magnetic spring and a Y-direction magnetic spring are vertically arranged and connected in parallel to realize the parallel connection of a horizontal two-degree-of-freedom positive and negative stiffness structure. The X-direction magnetic spring is composed of a first fixed magnet, a first moving magnet, a second moving magnet and a second fixed magnet in an array along a horizontal X axis. The Y-direction magnetic spring is composed of a third fixed magnet, a third moving magnet, a fourth moving magnet and a fourth fixed magnet in an array along a horizontal Y axis. The horizontal two-degree-of-freedom electromagnetic vibration isolation device has the advantages that structure is simple and flexible, natural frequency is low, utilization rate of magnetic materials is high, and horizontal two-degree-of-freedom low-frequency / ultra-low frequency vibration isolation effect of precision instruments is realized.

Description

technical field [0001] The invention belongs to the technical field of precision vibration isolation, in particular to a horizontal two-degree-of-freedom electromagnetic vibration isolation device based on the parallel connection of positive and negative stiffnesses of magnetic attraction. Background technique [0002] In the process of installation, testing and experimentation of precision instruments and equipment, low-frequency micro-amplitude vibration interference in the environment has become one of the key issues affecting research results. Equipping precision instruments and equipment with low-frequency vibration isolators has gradually become a field of precision engineering to suppress environmental micro-vibration main technical means. Low-frequency vibration isolators mostly use positive and negative stiffness structures connected in parallel or in series to achieve vertical low-frequency vibration isolation effects, while horizontal low-frequency vibration isola...

AI Technical Summary

Problems solved by technology

[0006] The present invention aims at the research on the impact of environmental vibration interference on precision instruments and equipment, and the current problem that there are few electromagnetic vibration isolation devices that can achieve the low-frequency vibration isolation effect of the horizontal two degrees of freedom. The electromagnetic vibration isolation device, in the horizontal X direction, uses the negative stiffness generated by the X-direction magnetic spring and the positive stiffness generated by the Y-direction magnetic spring in parallel to achieve low-frequency vibration isolation effect; in the horizontal Y direction, uses the positive stiffness generated by the X-direction magnetic spring and the positive stiffness generated by the Y-direction magnetic spring The negative stiffness generated by the Y-direction magnetic spring is connected in parallel to realize the low-frequency vibration isolation effect. In the Z direction, the positive stiffness generated by the X-direction magnetic spring and the positive stiffness generated by the Y-direction magnetic spring are connected in parallel to realize the function of stably supporting the vibration isolation load.

Images