Rotor of centrifugal compressor, centrifugal compressor, and method of manufacturing rotor of centrifugal compressor

摘要

A rotor (1) of a centrifugal compressor (100) includes a rotor main body (9) extending in an axis (A) direction and having a recessed part (11) formed on an outer circumferential surface (9A) thereof, an impeller (2) including a cylinder part (12) having a cylindrical shape extending around the axis (A) and in which an inner circumferential surface (12A) having a fitting region (16) tightly fitted to the outer circumferential surface (9A) of the rotor main body (9) is formed, an annular disc (13) extending from the cylinder part (12) to a radial outer side with respect to the axis (A), a plurality of blades (14) provided at intervals in a circumferential direction on a surface facing one side in the axis (A) direction of the annular disc (13), and a cover (15) covering the plurality of blades (14) from the one side in the axis (A) direction, and a contact member (10) fitted into the recessed part (11) and in which a part protrudes from the outer circumferential surface (9A) toward a radial outer side to come in contact with the cylinder part (12) from the axis (A) direction.