| 摘要 |
PROBLEM TO BE SOLVED: To provide a high-efficient axial flow turbine and its stage structure capable of positively controlling leakage fluid passing through a gap between a rotor blade tip and a stationary vane diaphragm outer ring by providing a through-hole to the stationary vane diaphragm outer ring, and reducing stage loss by restraining interference to a main stream. SOLUTION: This axial flow turbine stage structure is constituted of stationary vanes 3 arranged in line in a circumferential direction in an annular flow path of an axial flow turbine, and rotor blades 6 arranged on a downstream side of the stationary vanes and embedded in line in a circumferential direction of a turbine shaft. A plurality of through-holes 9 are provided from a stationary vane inlet side to a stationary vane outlet side of a diaphragm outer ring 1 of the stationary vane. COPYRIGHT: (C)2009,JPO&INPIT |
