| 摘要 |
PURPOSE:To reduce the number of parts by forming a casing with a single construction through omission of internal cylinder. CONSTITUTION:Casing 1 formed in a single construction is recessed in a pit 2. The part A is depressed for the purpose of preventing interference of the movable vanes 5a of impeller 5a with the guide vane 3, and after the impeller 5 has passed smoothly the guide vane 3, the guides 10a, 10b are put in engagement with the guide vane 3. Then the part A is fixed. The number of parts is reduced by thus construcing with a single casing instead of conventional double casing, and the cost will be reduced accordingly. |
