| 摘要 |
PURPOSE:To form a shroud and a blade certainly in an integrated body by inserting a hook-like projection formed on a blade into a hooking bore of a shroud. CONSTITUTION:Hook-like projections 19, 20 of a blade 18 are inserted into hooking bores 16, 17 of shrouds 14, 15 to be a provisional construction. After that, each of said blade 18 is pushed radially and outwardly, whereby said shrouds 14, 15 enter into the clearances 21, 22 of said hook-like projections 19, 20 to be a final product. During assembly, both front and rear shrouds 14, 15 are fixed by the hook-like projection 19, 20 and during rotation of the impeller, both shrouds 14, 15 fixed more strongly because the force is applied radially and outwardly to the blade 18 due to the centrifugal force. |
