Solid cold air generator structure for space propulsion system

Abstract

A solid cold air generator structure for a space propulsion system comprises an igniter, a backing ring, a filter screen, a supporting ring assembly, a grain component, a shell and a U-shaped bottom cover; one end of the igniter extends out from the interior of the shell to the top and is in threaded connection with the backing ring; the outer wall of the igniter is sleeved with the filter screen;the grain component, the supporting ring assembly and the shell are sequentially sleeved from inside to outside, and the U-shaped bottom cover and the inner wall of the shell are welded and fixed; aplurality of circular exhaust holes are uniformly distributed in the circumferential direction of the top of the shell; the outer wall of the grain component is not in contact with the inner wall of the shell to guide gas; and a plurality of notches are machined inwards in the outer wall of the U-shaped bottom cover in the radial direction. According to the solid cold air generator structure, theignition end is used for main exhaust, the gas circulation performance is good, and heat generated by combustion of high-combustion-speed powder is used for maintaining work of other low-combustion-speed gas generating agents.

Description

technical field [0001] The invention relates to a solid cold air generator structure for a space propulsion system, belonging to the field of propulsion technology. Background technique [0002] In order to meet the rapid response and reduce the cost of the satellite development process, the satellite is developing towards modularization, which requires the space propulsion system to be able to plug and play, reduce the assembly coupling cycle, and reduce the filling cycle of the base. For traditional chemical propulsion systems and cold air propulsion systems, Pressurization with high-pressure nitrogen cannot realize the pre-packaging and plug-and-play propulsion system, but the use of solid cold air generators can solve the problem of pre-packaging and plug-and-play. [0003] In CN 1103921956B "Solid Cold Air Micro-Propulsion System", Zhu Peng et al. from Nanjing University of Science and Technology proposed a solid cold air generator structure. The generator gas outlet is...

AI Technical Summary

Problems solved by technology

The micro-hole exhaust is designed in the form of milling and flattening at the tail of the generator, and part of the hot gas is diverted to form convective heating of the gas-generating agent grain, ensuring the continuous combustion of the gas-generating agent tail, and solving the problem of the large aspect ratio solid cold gas generator. flameout problem

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