A return type compressor and its engine

Abstract

The invention discloses a reflux compressor and its engine, comprising a U-shaped sleeve rotor, the U-shaped sleeve rotor comprising an inner cylinder, an outer cylinder and an annular cylinder connected between the inner cylinder and the outer cylinder Bottom; the U-shaped sleeve rotor opening side is provided with an end cover, and an inner channel stator and an outer channel stator are arranged between the end cover and the U-shaped sleeve rotor, wherein the inner channel stator is arranged on In the middle part of the inner cylinder, the outer duct stator is arranged between the inner cylinder and the outer cylinder; a low-pressure compressed air section is formed between the inner cylinder and the inner duct stator; the inner cylinder and the inner duct A high-pressure compressor section is formed between the stators of the outer duct; the airflow flows back into the high-pressure compressor section after passing through the low-pressure compressor section, and then is discharged after reflowing; the present invention can improve the compressor's compressor capacity, thereby increasing the power of the engine, and The axial dimension of the engine can be shortened.

Description

technical field [0001] The invention relates to the field of engines, in particular to a return type air compressor and its engine. Background technique [0002] With the continuous development of the aviation industry, the performance of aircraft has become more and more excellent, and the requirements for engine performance have also increased. In order to meet the demand for higher power of the engine, it is imperative to improve the compression capacity of the engine compressor, especially the efficiency. The main direction of the existing compressor development: increase the number of compressor stages, increase the single-stage compression ratio, increase the bearing speed, and realize multi-stage bearings. [0003] However, increasing the number of stages of the compressor will increase the number of parts, and the increase in the axial dimension will greatly weaken the overall reliability of the compressor; increasing the single-stage compression ratio will have a v...

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Problems solved by technology

[0003] However, increasing the number of stages of the compressor will increase the number of parts, and the increase in the axial dimension will greatly weaken the overall reliability of the compressor; increasing the single-stage compression ratio will have a very high requirement for the improvement of the performance of the blade material; increasing the bearing speed in addition to In addition to high requirements for bearing materials, it also puts forward more stringent performance requirements for the compressor efficiency of the blades at higher speeds; as for the realization of multi-stage bearings, although it will make the cooperation between the compressors more efficient, it will also Increased mechanical complexity will cause a significant decrease in overall reliability, which is not conducive to maintenance. In addition, the above development direction will inevitably aggravate the cooling problem of the compressor more or less

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