Micro turbine jet engine with two-sided centrifugal pressure roller

Abstract

The invention belongs to the technical field of micro turbine jet engines and particularly relates to a micro turbine jet engine with a two-sided centrifugal pressure roller. The micro turbine jet engine comprises a starting motor, a double-sided centrifugal compressor, a three-dimensional streamline diffuser, an intermediate casing, a turbine guider, an axial flow turbine, an exhaust tailcone, a tail jet pipe, an outer housing, a combustion chamber, a front-end casing, a rotor shaft, an air inlet rectifier, an auxiliary support, a first main support and a second main support, wherein the axial flow turbine and the rotor shaft are connected together by electron beam welding; the three-dimensional streamline diffuser is arranged on the outlet end of the double-sided centrifugal compressor. The micro turbine jet engine disclosed by the invention has the advantages that the reliability of the engine is improved, the life of the engine is prolonged, the rotor supporting rigidity is improved, the flexible deformation and vibration of a shaft are reduced and the efficiency of the diffuser is improved.

Description

technical field [0001] The invention belongs to the technical field of micro-turbojet engines, in particular to a micro-turbojet engine with double-sided centrifugal pressure wheels. Background technique [0002] Micro-turbojet engine (abbreviated as micro-vortex) is a kind of aerodynamic power developed rapidly in recent years. The feature of this kind of thermal energy machine is the miniaturization of power and geometric scale, so it has a wide range of applications in many fields. It works on the same principle as a conventional turbojet engine. The turbine drives the compressor to compress the air, and the high-pressure air flows through the combustion chamber and is heated by fuel injection to become high-temperature and high-pressure gas, which drives the turbine to do work, and then the high-speed injection of the tail nozzle generates thrust. Micro-vortex compressors usually use micro-centrifugal compressors, which are characterized by high single-stage pressure ra...

AI Technical Summary

Problems solved by technology

Micro-vortex compressors usually use micro-centrifugal compressors, which are characterized by high single-stage pressure ratio, higher efficiency than axial flow compressors of the same small size, good working stability, simple structure and low manufacturing cost, but in the same windward area The air flow rate is much lower than that of the axial flow compressor

[0003] Due to size and weight limitations, the microvortex usually adopts the structure of a one-stage centrifugal compressor plus a one-stage turbine, which greatly restricts the increase of air flow and the improvement of the thrust-to-weight ratio of the engine is also very limited.

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