| 摘要 |
PROBLEM TO BE SOLVED: To prevent the wear of a runner due to sediment by preventing the mixture of sediment into water jetted from a nozzle pipe of a Pelton wheel to a bucket. SOLUTION: When a needle valve 8 is opened at starting the Pelton wheel, a deflector 16 is closed to shut off water jetted from the nozzle pipe 4 only for a predetermined time T<SB>2</SB>. Then, sediment staying on the upstream side of the nozzle pipe 4 drops together with the jetted water without hitting the bucket 3 while being interrupted by the deflector 16, thus preventing the collision of the sediment with the bucket 3. COPYRIGHT: (C)2007,JPO&INPIT
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