Rotor system and micro gas turbine generator set

Abstract

The invention provides a rotor system and a micro gas turbine generator set. The rotor system involves a rotating shaft, a motor, a radial bearing, an air compressor, an integrated bearing and a turbine, wherein the rotating shaft is of an integrated structure, and the motor, the radial bearing, the air compressor, the integrated bearing and the turbine are sequentially arranged on the rotating shaft; and the motor comprises a motor stator and a rotor iron core, wherein the motor stator sleeves one end of the rotating shaft, a motor rotor iron core mounting cavity is formed in the end, sleevedwith the motor stator, of the rotating shaft, a rotor iron core is arranged in the motor rotor iron core mounting cavity, and the port of the motor rotor iron core mounting cavity is not closed. According to the rotor system and the generator set, the layout of the rotor system is compact, the axial size of the rotor system is short, the stability of the high-speed operation is good, the rotatingshaft is of an open structure, the heat dissipation performance of the motor rotor core is good, the rotating shaft is not prone to be deformed and the precision is high.

Description

technical field [0001] The invention relates to the technical field of rotor dynamics, in particular to a rotor system and a micro gas turbine generating set. Background technique [0002] The micro gas turbine is a newly developed small heat engine, its stand-alone power ranges from 25 to 300kW, and its basic technical features are radial flow impeller machinery and regenerative cycle. A micro gas turbine mainly includes three major components: a compressor, a combustor and a turbine. After entering the compressor, the air is compressed into high-temperature and high-pressure air, which is then supplied to the combustion chamber for mixed combustion with fuel, and the high-temperature and high-pressure gas generated expands in the turbine to perform work. When the rotor rotates at high speed, the rotor will be subjected to radial force and axial force. In order to limit the radial and axial movement of the rotating shaft, radial bearings and thrust bearings need to be ins...

AI Technical Summary

Problems solved by technology

[0004] In the prior art, a coupling is usually used to connect the gas turbine rotor and the generator rotor, and the stability of the rotor system is poor due to the deviation of the coaxiality

At the same time, the setting of the coupling restricts the setting position of the thrust bearing. This is because as the rotor speed increases, the axial force on the rotor will further increase. If the thrust bearing is set between the compressor and the turbine, it will The center of gravity of the entire rotor system is biased toward the turbine side, resulting in poor stability of the rotor system

If the thrust bearing is placed on the side of the coupling facing the generator, all the axial force of the rotor will act on the coupling, which will easily cause damage to the coupling

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