A Mechanical Vectoring Nozzle with Bellows Structure

Abstract

The invention discloses a mechanical thrust vectoring nozzle with a bellows structure and belongs to the field of aeroengines. The mechanical thrust vectoring nozzle comprises an equivalent section, abellows section, a convergent section, pull rods and positioning pieces; an inlet of the equivalent section is an outlet surface of a high-temperature turbine; an outlet of the equivalent section isconnected with an inlet of the bellows section; an outlet of the bellows section is connected with an inlet of the convergent section; one end of each pull rod is connected with the bellows section; the equivalent section is connected with the convergent section by using the positioning pieces; and the pipe walls of the equivalent section, the bellows section and the convergent section are respectively provided with crevice channels. By applying a mechanical thrust vectoring nozzle structure in the technical scheme of the invention, the sealed bellow section is bent by applying force to the pull rods, so that the nozzle is allowed to have high thrust vectoring performance, and the problem that air leakage of the mechanical thrust vectoring nozzle in the prior art leads to loss is solved; and cooling gases are introduced into the crevice channels in the pipe walls, so that the wall surface temperature is reduced and high stealth performance of the nozzle can be ensured.

Description

technical field [0001] The invention belongs to the field of aero-engines, and in particular relates to a mechanical vector nozzle with bellows structure. Background technique [0002] With the continuous improvement of modern aviation and military technology, the living environment of fighter jets is deteriorating day by day. In order to gain advantages in various types of air combat and improve the survival rate, higher requirements are put forward for aircraft performance, and thrust vectoring technology has therefore become one of the essential key technologies. The use of thrust vectoring technology for aircraft can not only greatly improve maneuverability and agility, but also reduce infrared radiation and improve the stealth capability of aircraft, thereby significantly improving air combat effectiveness and survivability. Thrust vectoring nozzles can generally be divided into two types: mechanical and pneumatic. At present, the pneumatic vectoring nozzle is still in...

AI Technical Summary

Problems solved by technology

[0005] In order to avoid the deficiencies of the prior art, the present invention proposes a mechanical vectoring nozzle with a bellows structure, which adopts the characteristics of flexible, deformable and good sealing performance of the bellows to solve the problems of the mechanical vectoring nozzle in the prior art. Poor wall sealing and complex actuation structure

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