Single point flexible compression release device for spacecraft

Abstract

The invention provides a single-point flexible hold-down and release device for a spacecraft. The single-point flexible hold-down and release device comprises a fusing cutter, a hold-down base, a tension cable component, a moving block and a lock nut, wherein the moving block is connected with the hold-down base through the tension cable component, the lock nut is arranged on the tension cable component and outside the moving block, the fusing cutter which is arranged on the hold-down base is used for fusing the tension cable component, the hold-down base is used for being installed on the body of the spacecraft, and the moving block is used for being arranged in a stepped hole of a deployed appendage of the spacecraft so that the moving block has only one rotational degree of freedom around the central axis. The single-point flexible hold-down and release device for the spacecraft can effectively compress the deployed appendage onto the hold-down base with the compression force adjustable. In addition, thermal cutting can be achieved through the fusing cutter, so that low impact is caused in a releasing process without causing pollution.

Description

technical field [0001] The invention relates to a compression release device, in particular to a single-point flexible compression release device for a spacecraft. Background technique [0002] At present, the compression rod / pyrotechnic cutter type compression release mechanism commonly used in China, its working principle is to directly use the thrust generated by the explosion of the pyrotechnic device to push the cutter in the cutter, so that it can press the pressure at high speed. Tight rod cut off. [0003] This type of compression and release mechanism has the following limitations: the instantaneous large-scale shock load generated will affect the attitude of the satellite and the sensitive unit, and the corrosive and polluting gas will be generated during the ignition of the pyrotechnic device, which directly uses the explosion of explosives to produce There are certain potential safety hazards in the energy. The pyrotechnic device is a dangerous product, which br...

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Problems solved by technology

[0003] This type of compression and release mechanism has the following limitations: the instantaneous large-scale shock load generated will affect the attitude of the satellite and the sensitive unit, and the corrosive and polluting gas will be generated during the ignition of the pyrotechnic device, which directly uses the explosion of explosives to produce There are certain potential safety hazards in the energy. The pyrotechnic device is a dangerous product, which brings inconvenience to ground storage and use. The cost of the ground test increases due to the non-reusable characteristics of the pyrotechnic device and the compression rod.

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