Magnetic liquid damping vibration attenuation device

Abstract

The invention discloses a magnetic liquid damping vibration attenuation device which is suitable for longer object vibration attenuation in a spacecraft and can be used for solving the vibration attenuation problem of longer object vibration attenuation in the spacecraft. The magnetic liquid damping vibration attenuation device comprises an end closure (1), a magnetic liquid (2), a non-magnetic-conductive shell (3) and a permanent magnet (4), wherein the permanent magnet (4) is installed in the cavity of the non-magnetic-conductive shell (3), the magnetic liquid (2) is injected into the cavity of the non-magnetic-conductive shell (3) and the end closure (1) is used for sealing. The device is very sensitive to the inertia force, the adopted end closure (1) with threads is provided with a taper angle, the taper angle is 140degrees -170degrees, the depth of the end closure screwed into the non-magnetic-conductive shell (3) can be adjusted so as to regulate the pressure applied to the magnetic liquid by the end closure (1), the permanent magnet is a cylinder, the vibration attenuation effect is good for the vibration with low frequency, small displacement and small acceleration characteristics.

Description

Technical field [0001] The invention relates to a damping and vibration reduction structure, which is suitable for low frequency, small amplitude, especially for vibration reduction in a spacecraft weightless environment. Background technique [0002] Magnetic fluid damping is a new type of damping, which is very sensitive to inertial forces. In spacecraft, due to its special working environment, energy, volume, and weight constraints, its shock absorbers are required to be small in size, light in weight, and highly reliable. In spacecraft, there are many local damping problems of long objects (such as solar panels, satellite antennas, etc.). The vibration of these long objects has the characteristics of low frequency, small displacement, and small acceleration. For the vibration with this characteristic, the shock absorber must be very sensitive to the inertial force, and other vibration reduction methods are difficult to meet the requirements. [0003] The application number fi...

AI Technical Summary

Problems solved by technology

The end cover is a plane, and the friction energy consumption of the liquid is mainly related to the pressure gradient. When the permanent magnet and the magnetic liquid absorbed by it move in the cavity of the non-magnetic shell, it moves axially, and the magnetic liquid and the non-magnetic shell move The friction surface is a cylindrical surface, the pressure gradient is zero, and the frictional energy consumption is small; 4 to 8 through holes are evenly distributed in the axial direction of the cylinder of the permanent magnet, so that the magnetic field of the permanent magnet is weakened, and the binding ability of the permanent magnet to the magnetic liquid is weak. Weak damping effect

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