| 摘要 |
PROBLEM TO BE SOLVED: To provide a protection device for a hydraulic turbine capable of preventing a vane from being deformed and destroyed and preventing operation from becoming impossible even when a hard lump such as a broken part of a tree branch flows together with water in a water stream. SOLUTION: This hydraulic turbine provided with an impeller between a water channel on the upstream side and a water channel on the downstream side is arranged, a chest wall is provided in close proximity to the impeller, and a water introducing channel for introducing water in the water channel on the upstream side into a part of the impeller is provided to obtain power. It is provided with an elastic part capable of bending a tip part of each vane of the impeller onto an inner side backward in the direction of rotation. COPYRIGHT: (C)2005,JPO&NCIPI
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