| 摘要 |
PROBLEM TO BE SOLVED: To provide a steam turbine to be maintained in high turbine stage efficiency by preventing remaining of a deviation on the diaphragm outer ring 1 side on the downstream side of a turbine nozzle when merging a main flow G<SB>1</SB>and inserting steam G<SB>2</SB>on the basis of a result of minutely observing confluence of the main flow G<SB>1</SB>and the inserting steam G<SB>2</SB>. SOLUTION: This steam turbine constitutes a turbine stage 15 by combining the turbine nozzle 12 supported with both ends by a diaphragm outer ring 10 and a diaphragm inner ring 11 and a turbine moving blade 14 implanted in a turbine disk 13, and arranges this turbine stage 15 in a plurality of stages in the steam flowing direction, and has a steam inserting port 16 between the stages in the middle of the turbine stage 15. The steam turbine merges steam from an inlet of the turbine stage 15 and the inserting steam from the steam inserting port 16. The turbine nozzle 12 is arranged on the downstream side of the steam inserting port 16, and inclines the abdominal side 20 of the rear edge 19 in the rotational direction of a turbine rotor 21, and is arranged at a narrow angle to a radial line 22 passing through the rotational center O of the turbine rotor 21. COPYRIGHT: (C)2004,JPO
|
