Combined throat liner spraying pipe of solid rocket engine and manufacturing method

Abstract

The invention discloses a combined throat liner spraying pipe of a solid rocket engine and a manufacturing method. The spraying pipe comprises axisymmetric rotating body structural components comprising a convergent segment heat insulating layer, a throat liner, a backing, a diffusion segment heat insulating layer and a spraying pipe shell; the components are connected and sealed through steps formed by axial cylindrical faces and end faces so as to be assembled into the spraying pipe; and the throat liner is a combined throat liner and combined by connecting and sealing a plurality of throat liner blocks in a step manner. According to the combined throat liner spraying pipe of the solid rocket engine, the integral throat liner is divided into the multiple throat liner blocks each of a special structural type; every two throat liner blocks are connected and sealed through an assembling process so that the combined throat liner can be formed; and then the combined throat liner and the other axisymmetric rotating body structural components of the spraying pipe are assembled into the spraying pipe according to an existing corresponding assembling manner. Raw materials can be effectively saved, and the process preparing and machining cost is also reduced; and meanwhile, because the size of each single throat liner block is reduced, the thickness is reduced, the carburizing is even, and the product quality consistency can be guaranteed more easily.

Description

technical field [0001] The invention belongs to the field of solid rocket motors, in particular to a combined throat liner nozzle of the solid rocket motor and a manufacturing method. Background technique [0002] The throat diameter of the corresponding nozzle of the existing large-diameter solid rocket motor is large, that is, the throat lining of the nozzle is also large. The throat lining of the nozzle is generally an integral throat lining, which is integrally produced and machined, and the structure is an axisymmetric rotary structure. , the inner surface of the throat liner converges first and then expands, and the end surface of the outer surface and other axisymmetric rotary structural parts of the nozzle include the heat insulation layer of the convergent section, the backing, the heat insulation layer of the diffuser section, and the nozzle casing. The steps formed by the axial cylindrical surface and the end surface between the parts are connected and sealed to f...

AI Technical Summary

Problems solved by technology

[0003] For the large-size integral throat liner, due to the limitations of the manufacturing process and equipment, when the throat liner reaches a certain bottleneck size, the difficulty and complexity of the process will be greatly increased, and the quality of the formed product will be poor in consistency. There are defects such as uneven carburization, more carbon-rich areas, and large dispersion of material strength. In short, the consistency is difficult to guarantee

At the same time, with the increase in size, the transformation and investment of production equipment and processing equipment will lead to high costs

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