| 摘要 |
PURPOSE:To raise the efficiency of turbine by a method in which the nozzle blade is made turnable around the neighborhood of a trailing edge as the center, and a pin projected from the pivotal supporting point of the nozzle blade is held in the slide groove of the ring of a housing. CONSTITUTION:A pivotal supporting point 13 provided on one blade end face of a nozzle blade 11 is provided near the trailing edge 11A of the nozzle blade 11 and supported in the pivotal supporting hole 15 of a housing 3. A pin 16 projected from the pivotal supporting point is set in the housing 3 and held slidably in the slide groove of the ring 17. The pivotal supporting point 13 is turned through the pin 16 by turning the ring 17. The amount of moving in the radial direction of the trailing edge 11A during the turning period can thus be lessened, the leakage of gas along the rotary shaft can be prevented, and the efficiency of the turbine can be enhanced. |
