| 摘要 |
PROBLEM TO BE SOLVED: To improve strength and reduce loss.SOLUTION: An impeller 1, which is rotatably provided inside a casing (suction bell 24) through a rotational shaft 14, and in which a plurality of vanes 3 is arranged along a circumferential direction to be a rotation direction, includes: a fin 4 that is arranged along a tip part 3B of the vane 3, projects onto at least a negative pressure surface side, and is provided separately for each adjacent vane 3; and a connection rod 5 that is arranged so as to extend along the circumferential direction, and is bridged so as to consecutively connect the tip parts 3B of the adjacent vanes 3.SELECTED DRAWING: Figure 4 |
