A sma-driven notch bolt connection and separation mechanism

A separation mechanism and separation structure technology, which is applied in the direction of motor vehicles, space navigation equipment, space navigation aircraft, etc., can solve the problems of poor anti-vibration and shock performance, inability to monitor release, incomplete unlocking, etc. The effect of short separation time of mechanism and reduction of heat loss
CN108382609BActive Publication Date: 2021-02-05BEIHANG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
BEIHANG UNIV
Publication Date
2021-02-05

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Abstract

The invention provides a notched bolt connection and separation mechanism driven by SMA. The mechanism adopts notched bolts as connecting fasteners and SMA tubes as separated driving elements; After passing through the SMA tube and the separation structure substrate, it is screwed to the fixed structure substrate, thereby connecting and compressing the SMA tube, the separation structure substrate and the fixed structure substrate; The notch bolts are stretched and deformed, and break due to stress concentration at the notch to achieve separation. The impact load after the bolt breaks is absorbed by the metal rubber pad; the heat insulation layer and silicone insulating sleeve outside the heating layer can reduce heat loss , so that the heating and deformation of the SMA tube is faster, and the separation time of the mechanism is shorter. The invention has large release load, complete unlocking, high reliability, and strong vibration and impact resistance.
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Description

technical field

[0001] The invention relates to the technical field of the connection-separation mechanism of spacecraft, in particular to a connection and separation mechanism driven by SMA (shape memory alloy). Background technique

[0002] The spacecraft needs a variety of connection-detachment mechanisms to realize the connection and unlocking functions, such as the separation of multi-stage launch vehicles, the deployment of solar wings on satellites or spacecraft, and so on. At present, most of these devices are pyrotechnic bolts (also known as explosive bolts) and paraffin drivers. The pyrotechnic bolts will cause impact and cause pollution problems during the unlocking and separation process, while the paraffin driver has a complex structure and slow operation. With the development of the new generation of small satellites, especially the emergence of the new generation of small satellites, the contradiction between the defects of the existing technology and the rapi...

Claims

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