ROTATION SUPPORTING STRUCTURE OF HIGH SPEED MOTOR DRIVEN COMPRESSOR

摘要

PROBLEM TO BE SOLVED: To provide a rotation supporting structure of a high speed motor driven compressor capable of shortening the total length of a rotor, and making a useful condition in a space and in a rotor dynamic condition. SOLUTION: A rotation supporting structure of a high speed motor driven compressor is provided with a high speed electric motor 12 having a rotor shaft 11 whose both ends are penetrated, and an one step impeller 13 and a two step impeller 14 attached on both ends of the rotor shaft. The rotor shaft has a truncated cone surface 11a disposed coaxially with a part thereof, and has a thrust magnetic bearing 18 opposed to a back surface of the one step impeller 13 or the two step impeller 14, and a taper magnetic bearing 20 for using thrust and radius type opposed to the truncated cone surface.