Dipulse engine with integrated propellent twining structure and preparation method

Abstract

The invention discloses a dipulse engine with an integrated propellent twining structure and a preparation method. The dipulse engine comprises a combustion chamber shell, a soft interlayer, a first pulse grain assembly, a second pulse grain assembly, an ignition device and a jet pipe, wherein a front opening and a rear opening are formed in the two ends of the combustion chamber shell separately;the soft interlayer comprises a first section and a second section and divides the cavity of the combustion chamber shell into a first cavity, a third cavity and a second cavity; the first cavity isclose to the rear opening; the third cavity and the second cavity are close to the front opening and are formed internally and externally; the first pulse grain assembly comprises a first grain and afirst heat insulation layer; a central groove is formed in the first grain; the second pulse grain assembly comprises a second grain and a second heat insulation layer; the ignition device is arrangedat the front opening, and the top cover body of the ignition device is provided with a second extension part; the two wall surfaces of the second extension part are spliced with the combustion chamber shell and the second heat insulation layer separately; and the jet pipe is arranged at the rear opening. According to the dipulse engine, the second extension part is spliced with the combustion chamber shell and the second heat insulation layer, so that the negative weight is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of solid rocket motors, in particular to a dual-pulse motor with an integrated drug winding structure and a manufacturing method. Background technique [0002] Double-pulse solid rocket motor is a kind of solid rocket motor. It separates the combustion chamber into two combustion chambers by means of a flame-retardant and heat-insulating layer, and ignites the first and second pulse combustion chambers through two ignition devices to achieve double-pulse ignition. Work. Among them, the flame-retardant heat insulation layer is divided into two categories, one is a soft compartment, and the other is a hard compartment. The soft interlayer is located between the first pulse grain and the second pulse grain, providing thermal protection for the rear end of the second pulse grain, ensuring that the heat of the first pulse is not transferred to the second pulse during the long pulse interval, and when the second ...

AI Technical Summary

Problems solved by technology

[0005] The traditional dual-pulse engine combustor shell is pre-formed, and after the insulation layer in the combustor shell is made, it needs to be charged and cured, which is poor in workmanship, and the one-pulse grain is cured twice, which will accelerate the aging of the one-pulse grain

[0006] In addition, the ignition device and nozzle of the traditional dual-pulse engine are connected to the front and rear joints of the combustion chamber shell through metal flanges, and the negative mass is large.

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