A fast-starting gas generating device

Abstract

The invention discloses a gas generating device capable of being started quickly, and belongs to the technical field of gas generating devices. The gas generating device comprises a powder box shell,ignition powder, a powder blocking sheet, a sealing sheet, a combustion chamber shell and a solid propellant; the ignition powder is installed in an annular cavity of the powder box shell to be used for igniting the solid propellant; the powder blocking sheet is installed in the annular cavity of the powder box shell, and an annular through hole in the left end of the powder box shell is closed; the sealing sheet is mounted on the right end surface of the powder box shell, and an annular through hole in the right end of the powder box shell is closed; the open end of the combustion chamber shell abuts against the end surface of the end, where an annular boss is located, of the powder box shell; the solid propulsion of the tubular structure is coaxially mounted in the combustion chamber shell, and a gap is reserved between the end surface of the solid propulsion and the end surface of the powder box shell; and the inner circumferential surface of the solid propulsion is located outsidethe annular boss of the powder box shell. The gas generating device increases the length of ignition flame conduction, shortens the ignition delay time, and can achieve quick starting.

Description

technical field [0001] The invention belongs to the technical field of gas generators, and in particular relates to a gas generator capable of quick start. Background technique [0002] The gun-type ignition start is to use the gas generated by the gas generating device to directly impact the turbine blades to generate torque to drive the rotor, and ignite to start the engine during the belt rotation process. In order to improve the reliable start of the engine, the demand for gas generators will be raised in the development of existing and future turbine blade engines, so the rapid start of gas generators is a key technology. [0003] If the tail ignition is used in the existing gas generating device, the advantage of this ignition type is that the energy used is small and the output energy is large, but its disadvantage is that the high-temperature ignition combustion airflow that ignites the charge is not sufficient under the premise of heat exchange. That is to say, the...

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Problems solved by technology

[0003] If the tail ignition is used in the existing gas generating device, the advantage of this ignition type is that the energy used is small and the output energy is large, but its disadvantage is that the high-temperature ignition combustion airflow that ignites the charge is not sufficient under the premise of heat exchange. That is, the pressure will be released quickly from the nozzle, causing the gas generator to fail to output normally, and the quick start will fail

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