Liquid damper

Abstract

The invention discloses a liquid damper comprising a central shaft, and a sleeve flange and a bellows which are movably arranged outside the central shaft in a sleeving mode, and both ends of the bellows are hermetically connected to the sleeve flange and the central shaft respectively to form a sealing cavity which is internally provided with damping liquid and a bag body of which the volume is variable under the pressure of the damping liquid. When the liquid damper is used for vibration isolation, a vibration disturbance source generates disturbance so that relative displacement between the sleeve flange and the central shaft is formed, and the bellows is compressed or stretched; the damping liquid flows due to deformation of the sealing cavity, the bag body is pressed to change the size when the damping liquid flows, the damping liquid and the bag body can be matched to provide damping, dissipate energy and play a suppression role in vibration of load, so that the vibration can be suppressed properly; the property of vibration isolation for each frequency band is improved greatly, and effective guarantee is provided for improving the attitude control accuracy and safety design of spacecraft; and the structure is simple, and the liquid damper is easy to machine.

Description

technical field [0001] The invention relates to the technical field of aerospace equipment, in particular to a liquid damper. Background technique [0002] The current spacecraft have a large number of optical elements, which have high requirements for pointing accuracy and stability. In modern spacecraft attitude control systems, reaction wheels, single-frame moment gyroscopes, and solar wing drive mechanisms are important components in the control system. While they provide the necessary control power, they will also cause some harmful vibrations. For the convenience of Description, the above three systems are collectively referred to as disturbance sources below. The disturbance force and disturbance moment will reduce the performance index of precision instruments in the body space. Therefore, the vibration isolation of the spacecraft payload disturbance and the suppression of the spacecraft vibration are very important for improving the attitude control accuracy of the...

AI Technical Summary

Problems solved by technology

[0003] A typical vibration isolation device is a liquid damper. However, the vibration isolation effect of the current liquid damper is difficult to meet the vibration isolation requirements of the components in the spacecraft.

Images