liquid damper

Abstract

The invention discloses a liquid damper, which comprises a central shaft, a sleeve flange movably sleeved on the outside of the central shaft, and a corrugated tube. , the sealed chamber is provided with a damping fluid and a bladder whose volume is variable under the pressure of the damping fluid. When the liquid damper is used for vibration isolation, the disturbance generated by the disturbance source will cause relative displacement between the sleeve flange and the central axis, compress or stretch the bellows, and the damping fluid will flow due to the deformation of the sealing cavity. When the damping fluid flows, it will be pressurized and change its volume. The damping fluid and the capsule can cooperate to provide damping, consume energy, and play a role in suppressing vibration of the load, so that vibration can be better suppressed. For the vibration isolation performance of each frequency band Both are greatly improved, and provide effective guarantee for improving the attitude control accuracy of the spacecraft and strengthening the safety design of the spacecraft, and the structure is simple and easy to process.

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.

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