Magnetic Liquid Damper

Abstract

The invention discloses a magnetic liquid shock absorber, which comprises: a housing, the housing defines a cavity; a mass block, the mass block includes a first sliding rod; a first porous medium member, the first multiple The porous dielectric part is arranged in the first pipeline; the first magnetic liquid is filled in the first pipeline, and the first magnetic liquid is located in the extending direction of the first pipeline. Between the first porous medium member and the first sliding rod, the at least a part of the first pipe extends along a first direction; and a first gas, the first gas is filled in the first pipe Inside, the first gas is located between the first magnetic liquid and the second end of the first conduit. Therefore, the magnetic liquid damper according to the embodiment of the present invention has the advantages of being usable in space, having good and stable damping effects, and the like.

Description

technical field [0001] The invention relates to the field of mechanical engineering vibration, in particular to a magnetic liquid shock absorber. Background technique [0002] In the field of aerospace, space vehicles are very suitable for the use of passive shock absorbers due to energy constraints, especially for low-frequency, small-amplitude vibrations generated by long and straight objects in spacecraft, such as vibrations of antennas and solar panels. problem. The magnetic liquid shock absorber has the characteristics of zero energy consumption, sensitivity to inertial force, simple structure, fast vibration reduction speed, and long life. It is a passive shock absorber suitable for low-frequency, small-amplitude vibration, so it is especially suitable for aerospace Low-frequency, small-amplitude vibrations of long, straight objects in the field. In addition, magnetic liquid shock absorbers also have broad application prospects in ground systems, such as vibration is...

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Problems solved by technology

[0003] In the related art, the existing magnetic liquid shock absorber is mainly based on the second-order buoyancy principle shock absorber, and its main form is that the damping mass is a permanent magnet, and the fluid shear is generated through the relative motion of the permanent magnet and the magnetic liquid. , so as to achieve the effect of viscous energy consumption, such as document 1 (patent application with publication number CN104074903A), document 2 (patent application with publication number CN102032304A), most of the existing magnetic liquid second-order buoyancy principle shock absorbers have the following disadvantages: 1. The material of the permanent magnet is relatively brittle, and it is likely to cause a collision during the process of extremely high acceleration, which will cause the permanent magnet to break; 2. There are fewer friction surfaces for vibration reduction, and the vibration reduction effect is poor; 3. .Some magnetic liquid shock absorbers cannot be reset in space, making them unusable in space

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