| 摘要 |
PROBLEM TO BE SOLVED: To provide a hydraulic machinery which is enabled to prevent a hydraulic loss from increasing in a stay vane by setting the inlet angle of the stay vane properly, even in the case where the hydraulic machinery is downsized and increased to a large flow rate.SOLUTION: In a Francis turbine 100 according to an embodiment, a relation of Bin<Bout, when the passage height of an inlet side end part 20A of a stay ring 3 at a water-turbine operation time is designated by Bin whereas the passage height of a passage on a guide vane pitch circle C1, which is passed by a guide vane rotation axis 6 of a guide vane 4.SELECTED DRAWING: Figure 1 |
