A Sealing Structure of Lateral Combination Motion for Converging Section of Binary Vector Nozzle

Abstract

The invention provides a lateral combined motion sealing structure for the converging section of a binary vector nozzle, which is arranged between the converging section and the side wall, and includes a first sealing structure and a second sealing structure, and the first sealing structure includes an L type side plate hook, pressing plate and first mandrel, and a first cavity is formed between the L-shaped side plate hook, pressing plate and heat insulation layer; the second sealing structure includes a converging section side plate and a converging section side plate A bracket, a second mandrel, and a second cavity is formed between the heat insulation layer, the side plate bracket of the converging section, and the bending edge of the pressing plate. Cold air under pressure is input into the first cavity and the second cavity respectively, and the cold air under pressure compensates the thermal expansion displacement of the converging section through the first sealing structure to realize the sealing between the converging section and the side wall. The cold air under pressure compensates the deformation and displacement of the side wall through the second sealing structure, so as to avoid leakage of mainstream gas and cooling gas, reduce performance loss, ensure cooling effect, and ensure safe use.

Description

technical field [0001] The invention belongs to the field of aero-engines, and relates to a sealing structure design technology, in particular to a lateral combined motion sealing structure for a convergent section of a binary vector nozzle. Background technique [0002] In aero-engines, the binary vector nozzle not only has the vector deflection maneuverability of the axisymmetric vector nozzle, but also has the advantages of good stealth performance and integrated design with the rear fuselage, which can greatly improve the penetration and survivability of fighter jets. Most of the flow channel components in the binary vector nozzle are moving components. The flow channel components are in direct contact with the gas and bear high aerodynamic and thermal loads. During the movement of the nozzle, the high temperature and high pressure mainstream gas and high pressure cooling gas are well sealed. If it is damaged, it will directly affect the cooling effect and the performanc...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of interference and stagnation caused by thermal expansion displacement when the binary vector nozzle of the engine is working in a hot state, and the problem of mainstream gas leakage caused by outward deformation of the side wall, the present invention designs a binary vector nozzle The lateral combined motion sealing structure of the converging section of the nozzle can realize the sealing of the lateral mainstream gas and cooling gas in the converging section from the environment in high temperature and high pressure environments, avoid leakage of mainstream gas and cooling gas, reduce performance loss, and ensure Cooling effect to ensure safe use

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