| 摘要 |
PROBLEM TO BE SOLVED: To provide a centrifugal pump easy to secure coaxial arrangement of an impeller and a driving shaft. SOLUTION: The centrifugal pump 1 includes a housing 3 fitted to an engine block 2, a driving shaft 7 turnably supported by the housing, and an impeller 11 as an impeller fixed to one end of the driving shaft. The impeller is integrally formed with a disc-like base 12, a plurality of blade parts 13 cut and stood on a peripheral side thereof and bent in the axial direction in predetermined positions in the circumferential direction of the base, and a shaft part 14 protruded along the axial direction in the inner peripheral part of the base by pressing a metal plate. At the same time, the driving shaft is formed into a hollow cylindrical shape. The impeller is fixed to the driving shaft by fitting the shaft part in the inner periphery of one end of the driving shaft. COPYRIGHT: (C)2009,JPO&INPIT
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