Non-initiating unlocking device and locking and unlocking method thereof

Abstract

The invention provides a non-initiating unlocking device and a locking and unlocking method thereof, which belongs to the field of unlocking devices. The device comprising a fastening cord, A hot knife assembly and at least two locking release members, the lock release member is used for fixing on the first member and the lock release member is used for fixing on the first member, the fastening cord is for providing a tightening force to the lock release member such that the lock release member locks the second member in a first state, the hot knife assembly comprises a hot knife and a hot knife mounting part, The hot knife mounting part is made of heat insulating material, the hot knife is arranged in the hot knife mounting part, the fastening rope is in close contact with the hot knife,and the hot knife is an electric heating element for generating heat to fuse the fastening rope, so that the locking releasing part returns to the second state and releases the second part. The invention avoids the carbonaceous fragments caused by the radial thrust, and the hot knife and the hot knife mounting part are structured under the space environment, and the performance is stable and the reliability is high.

Description

technical field [0001] The invention relates to a non-pyrotechnic unlocking device and a locking and unlocking method, belonging to the field of unlocking devices. Background technique [0002] Locking and unlocking are the key technologies for spacecraft in-orbit flight, and are used to realize key actions such as solar wing deployment, antenna deployment, and payload release. Existing starships and weapon models mostly use pyrotechnic devices for connection and release actions. The main advantages of traditional pyrotechnic unlocking devices are: high reliability, large energy storage, fast action speed, simple and compact structure, quality and volume Small size and low cost, but because the pyrotechnic device relies on the explosion or combustion of gunpowder to drive the functional mechanism to complete the task, the pyrotechnic device has a working process that cannot be overcome by itself. Disadvantages such as gas, debris, etc. polluting the space environment and di...

AI Technical Summary

Problems solved by technology

[0004] In the existing release and separation device based on hot knife cutting, the hot knife needs to rely on the push part to move along the knife groove, resulting in a large volume and weight of the hot knife assembly, which is not suitable for the aerospace field that has strict requirements for light weight; in addition, the current After the rope is carbonized by the hot knife assembly, during the cutting process, the sheet-shaped hot knife exerts a radial thrust on the rope, causing the carbonized part of the rope to easily form carbon fragments and pollute the space environment; in addition, the pushing part of the existing hot knife assembly Spring preload is often used to push the hot knife to move along the knife groove. In a long-term space environment, the spring is prone to aging and plastic deformation under stress, resulting in performance degradation and low reliability of the hot knife assembly.

Images