Air entraining and dust removing structure for cooling air in aero-engine

Abstract

The invention relates to the technical field of dust removing of aero-engines, in particular to an air entraining and dust removing structure for cooling air in an aero-engine. The air entraining and dust removing structure comprises a cooling air path arranged between a high-pressure drum connecting shaft and a combustion chamber inner casing, an air entraining circular seam communicating with an outlet of a high-pressure air compressor is formed in the end, close to the outlet of the high-pressure air compressor, of the cooling air path, an air inlet through hole communicating with the cooling air path is formed in the combustion chamber inner casing, the air inlet through hole is formed in the side, close to a combustion chamber inlet diffuser, of the combustion chamber inner casing, and a first flow limiting piece for reducing the air inlet amount of the air entraining circular seam is arranged between the cooling air path and the air entraining circular seam. The air entraining and dust removing structure has the technical effects that sand and dust of cooling air entering the cooling air path can be effectively filtered, and the running efficiency and quality of the aero-engine can be improved.

Description

technical field [0001] The application belongs to the technical field of dust removal for aero-engines, and in particular relates to a bleed air dust-removal structure for cooling air inside an aero-engine. Background technique [0002] Modern civil aircraft are required to have all-weather and full-territory flight capabilities when performing tasks, and often work in complex regions or harsh climate environments, such as desert areas such as the Middle East, North Africa, and Xinjiang, China, dust weather, haze weather, etc., the engine Taking off, landing and flying in these harsh air environments will inevitably inhale a lot of sand and dust. [0003] The cooling air introduced into the engine from the main flow channel of the engine will be cohesive and aggregated in a high-temperature environment, which will deteriorate the working environment of the parts. When the cooling air containing a large amount of dust flows into the turbine blades, the bonded dust particles ...

AI Technical Summary

Problems solved by technology

[0007] The purpose of this application is to provide a bleed air dust removal structure for the internal cooling air of an aero-engine, so as to solve the problem that sand and dust easily enter the engine cooling air passage in the prior art problems resulting in reduced engine performance

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