A Charge Structure Suitable for Low Temperature Ignition

Abstract

The invention provides a charge structure suitable for low-temperature ignition, which includes a propellant grain, the center of the propellant grain is provided with a central hole through both ends along the axial direction; the propellant grain One end is provided with an inner taper opening coaxial with the central hole and connected; the end surface of the other end of the propellant grain is provided with an ignition charge ring installation groove, and an ignition charge ring is embedded in the installation groove. The igniting drug ring is arranged coaxially with the central hole; the one end face of the igniting drug ring and the bottom of the igniting drug ring installation groove are bonded by a nitrocellulose solution adhesive layer; A cladding layer is provided on the side wall of the propellant grain. The invention can effectively improve the ignition reliability of charge under low temperature environment on the premise of satisfying the internal ballistic performance. The invention can effectively improve the phenomena such as delayed ignition and ignition failure that occur when the charge is ignited at low temperature, and greatly improve the ignition reliability of the charge in a low-temperature environment.

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...

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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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