Special combustion chamber for gas generator

Abstract

The invention relates to the technical field of gas generators, in particular to a special combustion chamber for a gas generator. The special combustion chamber for the gas generator comprises a diffuser and a gas storage pipe. One end of the diffuser is connected into the gas storage pipe, an acceleration combustion chamber, a medicine cup and an ignition pipe are sequentially arranged in the diffuser in the direction away from the gas storage pipe, and starting mix capable of being ignited by the ignition pipe is arranged in the medicine cup. The acceleration combustion chamber comprises amounting pipe, a shrinking pipe and an expanding pipe which are sequentially arranged, the medicine cup is arranged in the mounting pipe, the joint of the shrinking pipe and the expanding pipe is a narrow throat, an exhaust port is formed in the expansion pipe in the circumferential direction, a blasting port is formed in the end, close to the gas storage pipe, of the expanding pipe, an exhaust hole is formed in the position, close to the shrinking pipe, of the diffuser in the circumferential direction, and a blasting film corresponding to the blasting port is arranged at the end, close to thegas storage pipe, of the diffuser. The acceleration effect of the flow rate of gas is good, and the blasting film is easily broken.

Description

technical field [0001] The invention relates to the technical field of gas generators, in particular to a special combustion chamber for gas generators. Background technique [0002] The airbag is a very important safety device on the car. When an accident occurs in the car, it can effectively reduce the damage to the human body of the accident, thereby protecting the lives of the driver and passengers. [0003] The airbag is mainly composed of a gas generator, a combustion chamber, a filter / filter, a propagating agent / expanding agent, an exhaust port, an air storage tube and other components. Gas Generator: A component that generates and releases gas in an automotive airbag system. Combustion chamber: The cavity in the gas generator that contains the transfer charge. Filter / filter: Filters the generated gas, retains solid residues in it, and has a certain cooling effect on high-temperature gases; usually composed of metal materials. Expansion powder / flame expansion powde...

AI Technical Summary

Problems solved by technology

[0005] The present invention mainly aims at the problem that although the funnel-shaped combustion chamber in the prior art has the effect of increasing the gas flow velocity at the nozzle, its speed-up effect is not good, and the bursting membrane may not be broken, and it provides a method for increasing the gas flow velocity. A special combustion chamber for a gas generator with a good speed effect and easy to break the bursting membrane

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