Air entraining structure of engine

Abstract

The invention provides an air entraining structure of an engine. The engine comprises an inner rotating shaft, and an axial-flow air compressor rotor and a centrifugal vane wheel which are coaxially and fixedly mounted on the inner rotating shaft, wherein a clearance is formed between two opposite end faces of the axial-flow air compressor rotor and the centrifugal vane wheel and is communicated with cooling air of an external main flow channel. The air entraining structure of the engine comprises an air entraining disc sleeved on the rotor, wherein a first ring-shaped cavity is formed between the inner ring surface of the air entraining disc and the outer peripheral surface of the inner rotating shaft; the air entraining disc is coaxially and fixedly clamped between the axial-flow air compressor rotor and the centrifugal vane wheel and is provided with a plurality of air entraining holes communicated with the first ring-shaped cavity along the radial direction; and each air entraining hole is communicated with the clearance. The air entraining structure of the engine, which is provided by the invention, has the advantages of simple structure, good flow guide effect, convenience in mounting, and the like; and meanwhile, the flux of the cooling air entering into the engine is sufficient and the cooling air can rapidly arrive at a hot end part, so the temperature of the hot end part is effectively reduced, and then the service life of the engine is prolonged and the reliability of the engine is improved.

Description

technical field [0001] The invention relates to the field of aeroengines, in particular to an engine bleed air structure. Background technique [0002] As the power-to-weight ratio of aeroengines continues to increase, the challenges faced by hot-end components are becoming more and more severe. In order to improve the life and reliability of aero-engines, it is critical to reduce the temperature of hot-end components. At present, cold air is introduced between the lower pressure compressor stages to reduce the temperature of the hot end components. However, there are following disadvantages in adopting this kind of bleed air method: [0003] 1. The cold air is subject to great flow resistance during the flow process, and the flow of cold air reaching the hot end components is insufficient; [0004] 2. The cold air is easy to heat up during the flow process, and the high-temperature air-conditioning cannot achieve the effect of cooling the hot end parts. Contents of the...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide an engine bleed air structure to solve the technical problem that the engine bleed air structure in the prior art cannot effectively cool down the hot end components in a timely manner

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