Lateral combined motion sealing structure for convergent section of binary thrust vectoring nozzle

Abstract

The invention provides a lateral combined motion sealing structure for a convergent section of a binary thrust vectoring nozzle. The lateral combined motion sealing structure is arranged between the convergent section and a side wall and comprises a first sealing structure and a second sealing structure. The first sealing structure comprises an L-shaped side plate hook, a pressing plate and a first core rod, and a first cavity is formed among the L-shaped side plate hook, the pressing plate and a heat insulation layer; and The second sealing structure comprises a convergent section side plate, a convergent section side plate bracket and a second core rod, and a second cavity is formed among the heat insulation layer, the convergent section side plate bracket and a bent edge of the pressing plate. Cold air under pressure is input into the first cavity and the second cavity respectively and compensates thermal expansion displacement of the convergent section through the first sealing structure, and sealing between the convergent section and the side wall is achieved. Cold air under the pressure compensates deformation displacement of the side wall through the second sealing structure, so that leakage of mainstream fuel gas and cooling gas is avoided, performance loss is reduced, the cooling effect is ensured, and the use safety is guaranteed.

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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