Supercritical carbon dioxide turbine-starting generator-compressor unit

Abstract

The invention discloses a supercritical carbon dioxide turbine-starting generator-compressor unit. A starting generator is provided with an annular motor stator and a motor rotor, and the motor rotoris arranged in an inner cavity of the motor stator rotatably relatively. The unit comprises a high-speed shaft, a plurality of groups of gears and a planetary gear, wherein a turbine impeller and a compressor impeller are mounted at two ends, extending in the axial direction, of the high-speed shaft separately, and the motor stator and the motor rotor are coaxially arranged along the high-speed shaft; the gears are fixedly arranged in the radial direction of the high-speed shaft; and the planetary gear is arranged in an inner cavity of the motor rotor and is provided with an inner gear ring and an outer gear ring, the inner gear ring is engaged with the gear on the high-speed shaft, and the outer gear ring of the planetary gear is connected to the motor rotor as a whole. Synchronous rotation of the motor rotor and the high-speed shaft is achieved through synchronous rotation of the inner gear ring and the outer gear ring. The TAC unit is small in size and compact in structure, the running speed of a turbine-compressor impeller is guaranteed, and meanwhile application of a low-speed high-power motor in the TAC unit is achieved.

Description

technical field [0001] The invention belongs to the technical field of power, and relates to a supercritical carbon dioxide turbine-initiating motor-compressor unit. Background technique [0002] Supercritical carbon dioxide Brayton cycle power generation technology is a closed-cycle turbine power generation technology that uses supercritical carbon dioxide as a working medium. It is a cutting-edge technology that has developed rapidly in recent years. Hundreds of megawatts), high power density, low vibration and noise and other advantages. The TAC (Turbine-Alternator-Compressor, that is, the turbine-inspired motor-compressor) unit is the core power generation equipment in the supercritical carbon dioxide Brayton power generation system. Due to the high density of supercritical carbon dioxide, the compressor and compressor in the TAC unit can be greatly reduced. The size of the turbine makes the turbomachinery components compact, which is conducive to improving the energy d...

AI Technical Summary

Problems solved by technology

However, at present, the high-speed permanent magnet motors developed by domestic professional motor manufacturers are relatively small in power, and there are no mature products at home and abroad for 300kW high-speed motors above 40,000rpm

However, the use of a low-speed motor to drive the speed-up gearbox is limited by the low efficiency of domestic high-speed gearboxes (≤90%); at the same time, the gearbox is large in volume, far exceeding the volume of the impeller, and cannot fully utilize the advantages of the compact structure of the TAC unit

Images