PURPOSE: To decrease excess electric energy and calorific value and also to improve reliability of thrust control by arranging an adjusting valve in a connecting pipe of the back surface of a compressor disc to an outlet of a diffuser on the outlet and then controlling this adjusting valve.
CONSTITUTION: A turbine disc 8 for adiabatic expansion high pressure gas is attached on one end of a shaft 12, and a compressor disc 2 for adiabatically compressing gas by power of the turbine disc 8 is attached on the other end. And the shaft 12 is supported by a journal bearing 13 and a thrust bearing to be controlled by electric current of electromagnets 14A, 14B. In this case, thrust force to act on the thrust bearing is always made to act on the turbine side. Moreover, an adjusting valve 19 is arranged in a connecting pipe 11 for connecting the back surface of the compressor disc 2 to the outlet of a diffuser 3 provided on this outlet. Moreover the current values of the electromagnets 14A, 14B for controlling the thrust part are detected, and a control unit 18 is operated by the adjusting valve 19.
HARADA SUSUMU
OKAMOTO KAZUO
