| 摘要 |
PROBLEM TO BE SOLVED: To provide an impeller enabling positioning and whirl-stop of a shroud, and capable of being prevented from affecting pump performance as much as possible.SOLUTION: An impeller includes: a pair of shrouds 11, 12; a plurality of impeller blades 13 arranged between the shrouds 11, 12 and welded with the shrouds 11, 12; and singular engagement parts 21, 22 provided in the shrouds 11, 12, and at welding of the shrouds 11, 12 and the impeller blades 13, engaging with an engaged part 111 of a tool 100 fixing the shrouds 11, 12, to perform positioning and whirl-stop of the shrouds 11, 12. |
