| 摘要 |
PROBLEM TO BE SOLVED: To make a structure simple and reduce cost by employing a nozzle that has no movable part as flow rate adjusting means of a water turbine for hydraulic power generation.SOLUTION: A nozzle 4 is disposed detachably inside an inlet pipe 2 of a cross-flow water turbine, in which a runner 3 is disposed on a distal discharging part of the inlet pipe 2 that introduces water transmitted through a water pressure pipe path, a center shaft of the runner 3 crossing a direction of water flow. The nozzle 4 is formed to have a quadrilateral cross-section and has a discharging part that has a smaller cross-section than that of the distal discharging part of the inlet pipe 2 at its distal end. A distal end of an upper face plate of the nozzle 4 is longer then a distal end of a lower face plate thereof so that the upper face plate extends to the vicinity of an outer circumference of the runner 3. Also, with the extending part of the upper face plate bended toward a direction away from the runner 3 to increase the area in which vanes of the runner 3 receive water, efficiency of the water turbine is further improved. |
