| 摘要 |
PURPOSE:To simplify the structure of a movable vane adjusting device by housing a piston a piston in a hydraulic cylinder formed by the main shaft of a pump and an impeller hub and by connecting an oil introducing channel to the oil chamber of the hydraulic cylinder in the captioned device of axial-flow type, slant-flow type, etc. CONSTITUTION:The lower end part of the main shaft 14 and the upper end part of the impeller hub 7 are connected with each other and constitute the cylinder 40. When pressure oil is supplied to the upper chamber 40a of the cylinder 40 through the intermediary of an operation oil small piping 45A, a rod 41 lowers together with the piston 24, while, when the pressure oil is supplied to the lower chamber 40b through the intermediary of an operation oil small piping 45B, the rod 41 rises together with the piston 24. With the lowering and rising of the rod 41, an impeller 8 is rotated through the intermediary of a spider 23, a joint 20 and an arm 19 and is kept at a prescribed angle. By this constitution the structure of the movable vane adjusting device can be made simple and its assembling and disassembling can also be facilitated. |
