| 摘要 |
PROBLEM TO BE SOLVED: To provide a centrifugal pump capable of inhibiting separation of flow in a negative pressure surface side of a part near a shroud side blade leading edge in low flow rate operation of the centrifugal pump and enabling stable operation of the centrifugal pump in a wide flow rate range without increasing manufacturing cost. SOLUTION: In the centrifugal pump including a casing, and a centrifugal impeller stored in the casing and having a plurality of blades 3 bent and formed to keep each position of one plate shape member in a longitudinal direction at predetermined angles arranged along between a shroud and a hub in a circumference direction by spot welding, a leading edge part 8 of the blades in a main flow upstream side is cut and divided into two. COPYRIGHT: (C)2008,JPO&INPIT
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