Magnetic liquid shock absorber based on first-order buoyancy principle

Abstract

The invention provides a magnetic liquid shock absorber based on a first-order buoyancy principle. The magnetic liquid shock absorber comprises a shell body, a first permanent magnet, a second permanent magnet, a mass block, a first porous medium piece, a second porous medium piece and a magnetic liquid, wherein a cavity is defined by the shell body, the first permanent magnet and the second permanent magnet are both arranged on the shell body, the mass block is located in the cavity and located between the first permanent magnet and the second permanent magnet, the first porous medium piece is located between the first permanent magnet and the mass block, and the second porous medium piece is located between the second permanent magnet and the mass block. Pores of the first porous mediumpiece and the second porous medium piece are filled with the magnetic liquid, so that the friction area of the magnetic liquid in the vibration attenuation process is increased, the vibration attenuation effect and the vibration attenuation efficiency of the magnetic liquid damping shock absorber are improved, and in addition, the first porous medium piece and the second porous medium piece further can prevent the first permanent magnet and the second permanent magnet from being broken, and therefore the service life of the magnetic liquid shock absorber is prolonged.

Description

technical field [0001] The invention relates to the field of mechanical engineering vibration, in particular to a magnetic liquid shock absorber based on the principle of first-order buoyancy. Background technique [0002] Magnetic fluid is a new type of functional material with fluidity and magnetism, and its unique properties make it widely used in engineering fields. 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. Therefore, the magnetic liquid damping shock absorber is widely used in the low-frequency, small-amplitude vibration reduction of long straight objects of large spacecraft (such as solar panels and antennas of space stations, etc.). At the same time, it also has broad application prospects on the ground, such as vibration reduction of high-power antennas up to 100 meters long, vibration reduction of prec...

AI Technical Summary

Problems solved by technology

However, magnetic liquid shock absorbers based on the principle of second-order buoyancy generally have the following disadvantages: 1. The permanent magnet material is relatively brittle, and the spacecraft will experience a process of acceleration during launch, which is likely to cause the permanent magnet to hit a wall 2. It is not easy to achieve magnetic shielding; 3. The improvement of the shock absorber effect is usually based on the change of the shape of the permanent magnet, etc., and the permanent magnet is not easy to process

Images