| 摘要 |
PURPOSE:To prevent a shroud of the upper part of a stop vane from damaging, by making a pitch between movable vane adjoining to the stop vane connected with a rotor disc of a turbine and a movable vane adjoining to the movable vane smaller than a reference pitch. CONSTITUTION:Pitches between movable vanes 11k, 11r adjoining to a stop vane 7 connected with a rotor disc and movable vanes 11l, 11s adjoining to the foregoing movable vanes respectively are set up smaller than those which become a reference of a movable vane group. Although the movable vanes 11k, 11r receive momenta M1, M2 through centrifugal force during revolution of a turbine, as the momenta M1, M2 are offset each other by falls N1, N2 in the circumferential direction due to a deformation in a state of burr of a dovetail of the rotor disc, a matter that a shroud 10 is damaged due to contact of the same with a stationary part is prevented from occurring without applying bending force to the shroud 10. |
