Damping vibration absorber with magnetism-isolating covers, magnetic liquid and application of first-order buoyancy principle

Abstract

The invention discloses a damping vibration absorber with magnetism-isolating covers, magnetic liquid and application of a first-order buoyancy principle, and belongs to the field of mechanical engineering vibration. By the aid of the damping vibration absorber, the difficult problem that existing damping vibration absorbers with magnetic liquid cannot be applied to engineering practice due to diversified structural problems can be successfully solved. The damping vibration absorber comprises a lower magnetism-isolating outer sleeve (1), a lower magnetic inner sleeve (2), an upper magnetism-isolating outer sleeve (3), an upper magnetic inner sleeve (4), an end cover (5), a first permanent magnet (6), the magnetic liquid (7), an upper spherical shell (8), a lower spherical shell (9), a counterweight (10), a second permanent magnet (11) and a shell (12). The damping vibration absorber has the advantages that non-magnetic mass blocks formed by the upper spherical shell, the lower spherical shell and the counterweight (10) can move in a cavity when the external vibrates, the magnetic liquid flows in the shell (12), accordingly, energy can be absorbed, frequency difference between the mass blocks and the shell (12) can be formed by first-order buoyancy generated by the first permanent magnet (6) and the second permanent magnet (11) inside the magnetic liquid, and magnetic flux leakage of the permanent magnets can be effectively prevented by the upper magnetism-isolating cover and the lower magnetism-isolating cover.

Description

technical field [0001] The invention belongs to the field of mechanical engineering vibration. Background technique [0002] 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. Due to the special operating environment of the space vehicle, its own volume, weight and energy carried are subject to certain restrictions, so the magnetic liquid damping shock absorber is very suitable for the low-frequency, small-amplitude vibration reduction of long and straight objects in large spacecraft, such as space stations. 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 precision balances, and so on. However, the existing magnetic liquid damping shock absorbers cannot be applied in engineering practice due to vario...

AI Technical Summary

Problems solved by technology

[0013] The technical problem to be solved by the present invention is that the existing magnetic liquid damping shock absorber cannot be effectively used in the ground environment due to various structural defects that cause the magnetic liquid to flow difficult, the permanent magnet to be easily broken, the magnetic flux leakage is serious, and the gravity is seriously affected. Problems such as vibration reduction make it impossible to be applied in engineering practice

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