Closed circulating turbine power generating system rotor structure based on air bearing

Abstract

The invention relates to a closed circulating turbine power generating system rotor structure based on an air bearing. The closed circulating turbine power generating system rotor structure comprisesa locking nut, an air compressor impeller, a composite shaft sleeve, a connecting shaft sleeve, a transition shaft sleeve, a motor shaft, a fixed shaft sleeve, a radial shaft sleeve and a turbine rotor. An external thread is arranged on the air compressor impeller, and an annular end face matched with an axial thrust bearing is arranged on the composite shaft sleeve. An internal thread is arrangedat one end of the connecting shaft sleeve, and an external thread is arranged at the other end of the connecting shaft sleeve. An internal thread matched with the transition shaft sleeve is arrangedat one end of the motor shaft. An internal thread matched with the external thread of the turbine rotor is arranged at the other end of the motor shaft. The fixed shaft sleeve is provided with an internal thread matched with the external thread of the turbine rotor, and an external thread matched with the internal thread of the fixed shaft sleeve and the internal thread of the motor shaft is arranged on the turbine rotor. According to the rotor structure, aiming at the characteristics of the air bearing, the reliability of a closed circulating turbine power generating system can be improved.

Description

technical field [0001] The invention belongs to the structural design field of a closed cycle radial flow turbine power generation system, and in particular relates to a rotor structure of a closed cycle turbine power generation system based on an air bearing. Background technique [0002] As a new and efficient form of heat conversion, the closed-cycle turbine power generation system can convert heat energy into electric energy through thermal processes such as heat absorption, expansion work, heat release, and compression with the help of a certain gas working medium in a closed environment. A typical closed-cycle radial turbine power generation system is mainly composed of turbines, compressors, bearings, generators, regenerators, couplings and other components. [0003] The rotor of the closed-cycle radial turbine power generation system mainly includes two parts: the turbine and the compressor impeller rotor and the generator rotor. It is one of the core components in t...

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Problems solved by technology

The rotor adopts an interference connection structure, although the coaxiality between the parts can be guaranteed to a certain extent, but since the strength of the interference connection depends on the assembly size and tolerance of the parts, the processing accuracy of the assembly parts has been raised. The requirements are very high; in addition, the rotor is affected by centrifugal load and thermal load during the working process, the actual interference of the connection part will be reduced, the connection strength and stiffness cannot be guaranteed, and the rotor parts are prone to loosening, which seriously affects the closed type. Working Reliability of Cycle Turbine Power Generation System

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