Charging structure suitable for low-temperature ignition

Abstract

The invention provides a charging structure suitable for low-temperature ignition. The charging structure comprises a propellant grain, and a center hole with the two ends being through is formed in the center of the propellant grain in the axial direction; an inner conical opening which is coaxial with the center hole and communicates with the center hole is formed in one end of the propellant grain; an ignition powder ring mounting groove is formed in the end face of the other end of the propellant grain, an ignition powder ring is mounted in the ignition powder ring mounting groove in an embedded mode, and the ignition powder ring and the center hole are coaxially arranged; the end face of one end of the ignition powder ring and the bottom of the ignition powder ring mounting groove are bonded through a nitrocotton solution bonding layer; and a coating layer is arranged on the side wall of the propellant grain. According to the charging structure, on the premise that the internal ballistic property is met, the charging ignition reliability in the low-temperature environment can be effectively improved; and the phenomena of delayed ignition, ignition failure and the like during charging low-temperature ignition can be effectively improved, and the ignition reliability of charging in the low-temperature environment is greatly improved.

Description

technical field [0001] The invention belongs to the field of solid gas generators, and relates to a charging structure for ignition, in particular to a charging structure suitable for low-temperature ignition. Background technique [0002] Due to the low combustion temperature solid gas generator has the characteristics of low gas temperature, clean gas, and maintenance-free, it is widely used in aerospace, aviation, modern weaponry and other fields, such as turbine start, missile tail rudder attitude control, missile body wing Exhibition, low-temperature gas charging, etc. Reliable ignition of low-combustion temperature solid gas generators in low-temperature environments is a more concerned issue in this field, involving many comprehensive influencing factors. From the perspective of propellants, low-combustion temperature solid gas generators mostly use low-combustion temperature double-base propellants. This type of propellant has a low detonation heat value, and its de...

AI Technical Summary

Problems solved by technology

From the perspective of propellants, low-combustion temperature solid gas generators mostly use low-combustion temperature double-base propellants. This type of propellant has a low detonation heat value, and its detonation heat value is less than 3500kJ / kg. Slow ignition, delayed ignition, under the influence of low temperature environment (initial propellant temperature -40°C ~ -60°C), delayed ignition or even blind fire are more likely to occur during the ignition process

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