Gas-solid mixed rocket engine free of initiating explosive device

Abstract

The invention discloses a gas-solid mixed rocket engine free of an initiating explosive device. The gas-solid mixed rocket engine is composed of a spark plug, an engine shell, an injector, a rupture disc, a solid propellant, a jet tube, a high-pressure air chamber and a combustion chamber. The engine uses the spark plug for ignition, and then potential safety hazards caused when an ignition head with an initiating explosive device is used for ignition are avoided. High-pressure air can make full contact with carbon powder through the injector, and it can be guaranteed that the carbon powder isreliably ignited when the spark plug is started so as to break the rupture disc; and high-temperature products generated by combustion of the carbon powder and air enter the combustion chamber to ignite the solid propellant and maintain continuous combustion of the solid propellant, and generated high-temperature gas is jetted through the jet tube to generate thrust. The rupture disc is adopted to seal gas in the high-pressure air chamber before the engine works, and then circuit design in the engine can be reduced. High-pressure gas is not dangerous during transportation and storage; and bydirectly placing the solid propellant in the combustion chamber, the space utilization rate of the engine can be increased, and the safety of the engine can be guaranteed.

Description

technical field [0001] The invention relates to the technical field of gas-solid hybrid rocket motor design, in particular to a gas-solid hybrid rocket motor without explosives. Background technique [0002] With the development of aerospace science and technology industry, more and more small or micro rockets are used in people's daily life such as meteorological rain enhancement, hail prevention, cloud elimination, frost prevention and high-altitude fire extinguishing, and there are even launchable rockets in the market. A small rocket model, which requires the rocket engine to be simpler in structure, more convenient to operate, and most importantly, have high safety and high reliability. [0003] Invention patent 200920125865.5 proposes "an engine for forest fire extinguishing bombs". In this engine, only the structure of the engine is optimized, without considering the potential safety hazards of solid gunpowder in high-temperature environments such as forest fires. Due...

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Problems solved by technology

[0003] Invention patent 200920125865.5 proposes "an engine for forest fire extinguishing bombs". In this engine, only the structure of the engine is optimized, without considering the potential safety hazards in the high-temperature environment where solid gunpowder is used in forest fires. Because solid gunpowder It has the characteristics of self-sustaining combustion. Once it is ignited under abnormal conditions, it will cause irreversible damage to the environment or people.

In the invention patent 201821468891.3 "A kind of air-pump rocket engine", although the safety of the engine is considered when the aircraft model aircraft advances in the air, the structural deficiency is that both gasoline and air need to be externally assisted during its use. Injection into the combustion chamber for combustion, the operation process and the structure of the engine are very complicated

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