IMPELLER, ROTOR COMPRISING SAME, AND IMPELLER MANUFACTURING METHOD

摘要

An impeller (10) is configured from two components: an internal peripheral component (20) and an external peripheral component (30). The internal peripheral component (20) is molded into a cylindrical shape. The external peripheral component (30) is formed by integrally molding: an annular disc (31) fitted to the external peripheral surface (21) of the internal peripheral component (20); a plurality of blades (40) provided allowing gaps in the circumferential direction from the surface of the annular disc (31) that faces away from an axis (O), the blades forming flow passages extending in the radial direction; and a cover (50) for covering the plurality of blades (40) from the sides opposite the axis, the cover having an insertion hole (53) through which the internal peripheral component (20) is inserted in the direction of the axis (O) allowing a gap in the radial direction.