Fixing structure for gas-generating agent grain of solid cold gas generator for space

Abstract

The invention discloses a fixing structure for a gas-generating agent grain of a solid cold gas generator for space. The fixing structure comprises a crossed waveform axial buffer supporting ring anda radial buffer fixing arm; the crossed waveform axial buffer supporting ring is composed of multiple layers of waveform springs, one end of the crossed waveform axial buffer supporting ring is fixedly connected with the top of the radial buffer fixing arm, and the other end of the crossed waveform axial buffer supporting ring abuts against an igniter; the radial buffer fixing arm is used for clamping the grain in a shell of the solid cold gas generator, so that the grain is positioned below the igniter; and the radial buffer fixing arm is supported between the outer wall of the grain and theinner wall of the solid cold air generator shell, so that the grain and the solid cold air generator shell are not in contact with each other, and a gap between the grain and the solid cold air generator shell is used for guiding air. Tests prove that the gas generating agent adopting the fixing structure does not have the problem of fracture. The solid cold gas generating agent fixing structure resistant to mechanical vibration has been successfully applied in orbit, and orbit control has been successfully completed.

Description

technical field [0001] The invention relates to a solid cold gas generator gas generating agent powder column fixing structure for space, and belongs 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 1103921956 B "Solid Cold Air Micro Propulsion System", Zhu Peng et al. of Nanjing University of Science and Technology proposed a solid cold air generator structure, as s...

AI Technical Summary

Problems solved by technology

At the same time, due to the relatively low heat released by the reaction of the gas generating agent, under the condition of heat transfer blockage, only convective heat transfer is not enough to achieve self-sustained combustion, so the gas generating agent cannot be maintained within the working temperature range, causing flameout failure , resulting in insufficient gas production

Images