| 摘要 |
PROBLEM TO BE SOLVED: To provide a turbine nozzle box capable of stably supplying steam of high pressure, and increasing the efficiency of the turbine even during partial arc operation.SOLUTION: A turbine nozzle box 1 is equipped with: an annular exterior ring plate 100 provided so as to have an outer peripheral surface adjacent to an inner peripheral surface of an interior casing; an annular nozzle unit 200 provided adjacent to an inner peripheral surface of the exterior ring plate 100; and an annular interior ring plate 300 provided so as to have an outer peripheral surface adjacent to an inner peripheral surface of the nozzle unit 200. The nozzle unit 200 includes a plurality of segment blocks 210 provided on a predetermined arc angle along a circumferential direction. The segment block 210 is provided at an inlet stage of the nozzle until 200 with one stage, and an outlet stage of the nozzle unit 200 with the one stage is formed to open.SELECTED DRAWING: Figure 3 |
