Connection sealing structure for nozzle assembly of solid rocket engine

Abstract

The invention relates to a connecting sealing structure of a nozzle assembly of a solid rocket engine. The spray pipe expansion section is a cylindrical structure with an inner cavity in a trumpet shape, a first step, a second step and a third step are sequentially arranged on the outer surface of the spray pipe expansion section, the spray pipe shell is sleeved outside the spray pipe expansion section, the inner cavity of the spray pipe shell is provided with a first step groove, a second step groove and a third step groove, the first step groove and the second step groove, and the third stepis matched, a sealant is arranged between the first step of the nozzle expanding section and the first step groove of the nozzle shell, the second step part of the spray pipe expansion section is provided with a concave annular installation groove, and the retaining ring is arranged in the concave annular mounting groove and forms a thread pair with the spray pipe shell. The structure can be applied to the connection of almost all small solid rocket engine nozzle assemblies, in particular, to address such limitations as structural space, it is desirable to withstand higher impact and higher weatherability, the nozzle assembly connecting structure with the problems of temperature shock resistance performance requirement and the like provides a high reliability. the structure is simple andcompact, and the processing technology is simple and convenient.

Description

technical field [0001] The invention relates to a small solid rocket motor nozzle assembly connection and sealing structure, which is used for the connection and sealing of the small solid rocket motor nozzle and belongs to the field of solid rocket motor structure design. Background technique [0002] The nozzle expansion section of small solid rocket motors is generally made of non-metallic materials, which not only plays a role in positioning and fixing the throat liner, but also plays a role in heat insulation and sealing, and also plays a role in improving the energy conversion efficiency of the engine. [0003] The nozzle assembly is a key component of the solid rocket motor, and the fixing of the nozzle assembly, the sealing of the body and the sealing of the joint between the nozzle assembly and the engine are the most important. For the design of small solid rocket motors, due to the limited envelope size, installation space and mass of the nozzle assembly, the conn...

AI Technical Summary

Problems solved by technology

In particular, it provides a connection method with high reliability, simple and compact structure, and simple processing technology to solve the connection structure of nozzle components such as limited structural space, large impact, high weather resistance, and temperature shock resistance performance requirements.

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