Sealing structure of exhaust nozzle outlet of solid rocket engine

Abstract

The invention discloses a sealing structure of an exhaust nozzle outlet of a solid rocket engine. The sealing structure comprises a tail ring and a diffuser insulation layer, wherein the diffuser insulation layer is located on the external surface of an exhaust nozzle; the diffuser insulation layer and the tail ring are fixed via screws; a bottom groove is formed in a radial direction of the tail ring; and the bottom groove is used for placing a sealing ring for realizing sealing between a diffuser and a steering engine room, so that a cabin is sealed. The sealing structure of the exhaust nozzle outlet of the solid rocket engine fully uses the overall given external structure dimension, so that the thickness of the insulation layer at the outlet is increased, and the working reliability of the exhaust nozzle is improved; and sealing is effectively performed, flame at the exhaust nozzle outlet and the steering engine room are isolated and equipment in the steering engine room is protected for the overall proposed consumable jet vane design.

Description

[0001] technical field [0002] The invention relates to the field of solid rocket motors, in particular to a sealing structure for the outlet of a solid rocket motor tail nozzle. [0003] Background technique [0004] The tail nozzle is one of the important parts in the engine structure. As the energy conversion device of the engine, it converts the thermal energy of the high-temperature gas into the kinetic energy of the gas, thereby generating thrust. At the same time, it is also a gas flow control device, which can establish a certain working pressure in the combustion chamber. [0005] In the design of the engine tail nozzle, in order to make the engine have better performance, under the premise of meeting the overall requirements, an appropriate expansion ratio and a good profile should be maintained in the structural design, and the nozzle efficiency and thermal The problem of protection. [0006] figure 1 It is a schematic diagram of the sealing structure of t...

AI Technical Summary

Problems solved by technology

The problem of the conventional radial structure is that when the outer surface of the metal tail ring is radially sealed by the external structure, there is no axial positioning, and the sealing ring is prone to displacement in the axial direction during the assembly process, which may cause the sealing ring to be damaged. Accidental damage, can not guarantee the effect of the overall seal

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