TURBINE DEVICE

PROBLEM TO BE SOLVED: To overcome the problem in the conventional art in fitting and/or fixing a blade 10 to be rotationally fitted into a blade groove 20 by improving a structure in which the root 30 of the blade 10 is rotationally fitted into the blade groove 20 in a turbine device with a plurality of the blades 10 and a rotor 1 equipped with a plurality of the blade grooves 20. SOLUTION: The root 30 of the blade and the blade groove 20 of the rotor 1 include end walls 36, 26, respectively, each of which has a mutually complementary tapered angle. The root 30 of the blade is so structured as to have a radial play inside the blade groove 20. By combining the radial play and the tapered angle of the end wall, an excessive turning motion becomes possible when the bottom 31 of the root 30 and the bottom 21 of the blade groove 20 contacts with each other. Conversely, when the bottom 31 of the root 30 and the bottom 21 of the blade groove 20 does not contact with each other, this excessive turning motion enables a final root 30 to be fitted into the blade groove 20. COPYRIGHT: (C)2011,JPO&INPIT