TURBINE ROTOR, TURBINE DISC, AND TURBINE

摘要

PROBLEM TO BE SOLVED: To prolong the fatigue life of a front fitting part 27 at a main body side in a turbine disc 13. SOLUTION: A plurality of dovetail grooves 17 are equally spaced at the periphery of the disc main body 15. A turbine moving blade 19 is fitted in each dovetail groove 17 respectively. The front fitting part 33 at the main body side is formed at the front face edge of the disc main body 15. The inner surface of the front fitting part 33 at the main body side is positioned at the outer edge side of the disk main body 15 rather than the top of the dovetail 21. A plurality of fitting groves 29 in which the dovetail 21 can be fitted in the front fitting part 33 at the main body side are equally spaced by continuous working of the dovetail groove 17. A front stopper 31 is provided in the front face of the disc main body 15. A reinforcement 35 is formed from the front side in the disk main body 15 to the periphery of the front fitting part 27 at the main body side. COPYRIGHT: (C)2005,JPO&NCIPI