STEAM TURBINE MOVING BLADE AND STEAM TURBINE ROTOR, AND STEAM TURBINE USING IT AND THE POWER GENERATION PLANT

摘要

PPROBLEM TO BE SOLVED: To suppress a local stress generated at the notch bottom formed in the axial inserted blade root and the blade groove from increasing, and to suppress the fretting fatigue by the contact of the local stress generating portion with an opposite portion from generating. PSOLUTION: A steam turbine moving blade is comprised of a blade, and the blade root implanted in a turbine rotor, having a hook of a plurality of stages in the turbine rotor radial direction. The blade root has such a shape that the blade root is inserted for the turbine rotor axial direction at a predetermined angle . An angle formed by planes to form a right angle to the center line viewed from the turbine rotor axial direction, and a contact parallel plane of hooks formed in the blade root and the blade groove respectively, and the value of are within the range of 500, 9039 and 900. PCOPYRIGHT: (C)2007,JPO&INPIT