Low-impact non-pyrotechnic separation device

Abstract

The invention discloses a low-impact non-pyrotechnic separation device, which is used for the locking and release between stages of a rocket, between a satellite and a launch vehicle, and of a satellite solar panel substrate, an antenna and the like. The low-impact non-pyrotechnic separation device is formed by using a shape memory alloy as a triggering switch and being provided with components and parts of springs, a locking sleeve, a split nut and the like in a matching manner. Based on the shape memory effect of the shape memory alloy, stretching and pre-deformation are firstly carried out on the shape memory alloy during assembly; when separation and unlocking are needed, an alloy material is electrified and heated to be at a phase-transition temperature of the alloy material; the alloy material is recovered to be in a shape before the pre-deformation; thus, a triggering block is driven to act; the locking sleeve is disengaged from the split nut; the release of loads of the satellite and the like is realized. After the one-time separation is completed, a trigger part inside a shell can be conventionally taken out; a shape memory alloy wire is loaded in the low-impact non-pyrotechnic separation device after the pre-deformation is carried out on the shape memory alloy wire once again by adopting a special tool; thus, the low-impact non-pyrotechnic separation device can be repeatedly used. The separation device provided by the invention is low in impact, can be repeatedly used, has no pollution, is low in cost, is safe to use, and is especially applicable to an occasion which is high in the requirement on a separation impact.

Description

technical field [0001] The invention relates to the technical field of spacecraft locking and separation, in particular to a low-impact non-pyrotechnic separation device. Background technique [0002] With the development of micro-nano technology, integrated multi-functional structure, integrated integrated electronics and other technologies, the trend of spacecraft precision is becoming more and more obvious. For example, the development and application of micro-satellites are gradually replacing some space tasks of traditional large satellites. With the improvement of the precision and integration of spacecraft, the separation impact requirements for precision spacecraft like microsatellites are becoming more and more stringent. At present, the separation device used in China is basically a pyrotechnic separation device, but the impact it produces is large (3000g ~ 5000g), which can easily lead to damage or malfunction of surrounding components and affect the reliability o...

AI Technical Summary

Problems solved by technology

At present, the separation device used in China is basically a pyrotechnic separation device, but the impact it produces is large (3000g ~ 5000g), which can easily lead to damage or malfunction of surrounding components and affect the reliability of separation. It is difficult to apply to precision spacecraft or its accessories. separation

At the same time, the pyrotechnic separation device has shortcomings such as inflammability and explosion, inconvenient storage, transportation and operation, and poor safety in use; it is a one-time consumable and cannot be reused, and its reliability is difficult to verify; a certain proportion of samples must be taken from the same batch of products Do detonation test to verify the batch pass rate, which will inevitably increase the cost

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