Explosive bolt resistant to space ultralow-temperature environment

Abstract

The invention relates to an explosive bolt resistant to a space ultralow-temperature environment. The explosive bolt comprises an igniter, a detonator base, a detonator, a pressing coil, a piston pushrod, a sealing disc, a bolt body, a first O-shaped ring, a paper gasket, a plug, a second O-shaped ring and a third O-shaped ring. A fire transfer hole is formed in the detonator base. During separation, a film bridge belt igniter works to ignite the detonator through the phi1mm fire transfer hole of the detonator base, explosive in the detonator is ignited and then outputs detonation to push thepiston push rod to move, the piston push rod moves rightwards to shear off the separation surface of the bolt body, the bolt body is separated into two parts, and a bolt head flies out rightwards. Inthe separation process, the piston push rod compresses the sealing disc rightwards, and the sealing disc seals remainder at the tail end in the explosive bolt. According to the explosive bolt resistant to the space ultralow-temperature environment, the bolt body and the detonator base which are made of titanium alloy TC4 materials are used, low-temperature brittleness is avoided, the impact resistance at the low temperature is better, the O-shaped fluorosilicone rubber sealing rings are adopted, and environment tests at the low temperature of 120 DEG C or below verify that sealing failure does not occur at the low temperature.

Description

technical field [0001] The invention relates to a space-resistant and ultra-low temperature resistant (below -120°C) pollution-free explosive bolt, which is especially suitable for structural connection and unlocking of key aerospace equipment such as high-orbit satellites and Mars exploration that need to face extreme space environments. Background technique [0002] Explosive bolts, as a connection and separation pyrotechnic device, are widely used in my country's aerospace industry to realize the mutual connection and separation of separate parts of different structures. [0003] With the increasing development of aerospace technology and aerospace pyrotechnics, a large number of pyrotechnic devices are used in various space activities such as foreign launch vehicles, high-orbit satellites, space stations, lunar exploration, and Mars exploration; there are also many domestic space vehicles. The pyrotechnics complete various functions. Such as: Discovery series satellites...

AI Technical Summary

Problems solved by technology

[0010] The technical problem of the present invention is: to overcome the lack of ultra-low temperature resistance of the existing explosive bolts, to provide an explosive bolt resistant to the ultra-low temperature environment of space, which can be reliably separated and unlocked at ultra-low temperatures (below -120°C) and can ensure structural integrity and no pollution

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