Retracting and releasing limiting device for outer adjustment sheets of adjustable nozzle of aero-engine

Abstract

The invention discloses a retracting and releasing limiting device for outer adjustment sheets of an adjustable nozzle of an aero-engine. The device comprises a plurality of outer upper adjustment sheets circumferentially distributed and fixed on a supporting ring at intervals, wherein an outer lower adjustment sheet covers the space between every two adjacent outer upper adjustment sheets, the front end of the outer lower adjustment sheet is fixed on the supporting ring, and the outer lower adjustment sheet covers the gap between every two adjacent outer upper adjustment sheets; a partial surface of the outer upper adjustment sheet is arranged below the gap between the two adjacent outer lower adjustment sheets; the device further comprises a limiting component for expanding the outer upper adjustment sheets and the outer lower adjustment sheets in the radial maximum diameter state, and the limiting component can guarantee that the outer lower adjustment sheets cannot be disengaged from existing limiting gaps between the outer upper adjustment sheets in the expanding movement process of the adjustable nozzle from the minimum diameter state to the maximum diameter state. The outer lower adjustment sheets and the outer upper adjustment sheets always form a complete enveloping surface to obtain a reliable maximum-diameter nozzle state, so that the safe and reliable performance of the adjustable nozzle in the working process is ensured.

Description

technical field [0001] The invention relates to a retractable and retractable limit device for an adjustable nozzle outer regulating piece of an aero-engine, and belongs to the technical field of aero-engines. Background technique [0002] The adjustable nozzle of the aero-engine is one of the main structures of the engine exhaust system. The tail nozzle realizes the adjustable design of different sizes and calibers of the outlet through the control mechanism, so as to realize the thrust adjustment requirements of the engine within a certain range. The outer regulating piece of the adjustable nozzle of the engine is divided into an outer upper regulating piece and an outer lower regulating piece, which retract and move with the change of the working state of the engine. During the retractable movement of the adjustable nozzle, it is necessary to ensure that the outer upper regulating piece and the outer lower regulating piece form a circular envelope surface, so as to realiz...

AI Technical Summary

Problems solved by technology

[0003] At present, there is no restriction on the movement trajectory of the upper outer regulating piece and the lower outer regulating piece. When the jet pressure is injected after combustion, the envelope surface formed by the expansion of the upper outer regulating piece and the lower outer regulating piece from the smallest diameter is in the state of the largest diameter nozzle. , the overlapping edge of the outer upper regulating piece and the outer lower regulating piece will come out, resulting in an incomplete envelope, unable to obtain a reliable maximum diameter nozzle state, resulting in unreliable safety performance during the working process of the adjustable nozzle

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