Double pulse solid rocket engine ignition device suitable for soft partition plate structure

Abstract

The invention provides a double pulse solid rocket engine ignition device suitable for a soft partition plate structure. An igniter is installed in the center of the end face of a propellant, and grain columns are distributed on the end face of the propellant in a multi-circle surrounding manner with the igniter as the center so that the grain columns can rapidly ignite the propellant, and the ignition delay of a second pulse engine is greatly shortened; that is, by reasonably arranging a dot-matrix structure of the grain columns in a second pulse ignition device and selecting the ignition grain columns working for a long time, the second pulse ignition device can bear the working pressure and vibration of a first pulse engine in the working process, adverse effects brought by instantaneous increase of the initial free volume after a soft partition plate ignition is opened to ignition starting of the second pulse engine can be eliminated, and the problem of ignition delay of the second pulse engine is effectively solved; and besides, the double pulse solid rocket engine ignition device is simple in structural design, the second pulse engine is reliable in ignition and free of ignition delay, part of negative mass is reduced, and the structure of the ignition device is more miniaturized.

Description

technical field [0001] The invention belongs to the technical field of engine ignition, and in particular relates to an ignition device for a double-pulse solid rocket motor suitable for a soft diaphragm structure. Background technique [0002] The dual-pulse solid rocket motor divides the charge combustion chamber into the first pulse charge combustion chamber and the second pulse charge combustion chamber according to the overall ballistic and structural requirements. Function, the two-stage engines are designed with independent ignition devices. When the first pulse motor is working, the soft partition isolates the charge of the second pulse motor to prevent it from burning. Pulse charge. [0003] According to the special working environment of the dual-pulse engine, the second pulse ignition device has strict requirements. The second pulse engine adopts the side ignition method of the powder column. Although the conventional end-face ignition method can ignite the engi...

AI Technical Summary

Problems solved by technology

[0003] According to the special working environment of the dual-pulse engine, there are strict requirements on the second pulse ignition device. The second pulse engine adopts the side ignition method at the end of the charge. Although the conventional end-face ignition method can ignite the engine charge, it is prone to ignition delay. , which is not conducive to the ignition of the second pulse engine, its structure is as figure 1 and figure 2 shown

That is to say, the second pulse engine adopts the side ignition mode of the powder column tail. When igniting, because the combustion chambers after the first pulse work are completed are the ignition chambers of the second pulse, the nozzle connected to the first pulse combustion chamber The glued blocking cover has been removed when the first pulse engine is working, resulting in a very large ignition cavity during the second pulse ignition, the nozzle has no blocking cover and the opening pressure of the soft compartment is small, which cannot maintain the establishment of ignition pressure in the combustion chamber, and The second pulse charge is an end-fired charge column with a small initial burning surface. The ignition flame cannot ignite the main charge of the engine in time, and the loss of ignition energy causes ignition delay.

Images