Engine jet pipe, solid rocket engine and solid rocket

Abstract

The invention discloses an engine jet pipe, a solid rocket engine and a solid rocket. The engine jet pipe comprises a jet pipe shell, a heat insulating layer, a backing and a diffusion segment, wherein an adjacent connection surface is arranged between a throat lining and the heat insulating layer. The distance between the part, near to a convergence face, of the adjacent connection surface and the axis of the jet pipe shell is larger than or equal to the distance between the part, near to a diffusion face, of the adjacent connection surface and the axis of the jet pipe shell. By means of thearrangement, the axial constraint to the throat lining is relieved, the axial tensile stress can be reduced, and the throat lining breakage caused by heat insulating layer limitation on throat liningexpansion and other situations in the prior art are avoided; the convergence ratio can be increased, a first connection point is far away from the rotation axis of the jet pipe so as to be farther from the nearest point on the throat lining, the flow velocity of fuel gas can be reduced, the erosion of the adjacent connection face between the heat insulating layer and the throat lining is reduced,and the reliability of the structure is improved.

Description

technical field [0001] The invention relates to the field of aerospace technology, in particular to an engine nozzle, a solid rocket motor and a solid rocket. Background technique [0002] With the development of solid rocket motors, the types of motors are becoming more and more diverse, and the structural design of the motors is becoming more and more important. Among them, the engine nozzle is one of the important parts of the solid rocket motor, which is used to expand and accelerate the high-temperature and high-pressure gas in the engine combustion chamber to provide the required thrust for the rocket. [0003] A solid rocket motor nozzle is disclosed in the prior art, which includes a thermal insulation layer in the converging section, a throat liner, a backing, a thermal insulation layer in the diffusing section, and a nozzle casing. The steps are connected with each other and assembled in a sealed manner. Among them, since the axial ends of the throat liner are re...

AI Technical Summary

Problems solved by technology

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defect that the throat liner in the engine nozzle in the prior art is damaged due to thermal stress not being released after being heated, thereby providing an engine nozzle

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