| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a connecting structure of turbine blades with improved fatigue resistance without any time and effort. <P>SOLUTION: One circumferential side surface 14 of a root portion 12 is roughened, and the other side surface 15 thereof is smoothed. The root portion 12 of one blade 10 is connected to an implanting portion 21. The root portion 12 of the next blade 10 is connected to the implanting portion 21 so that the roughened surface 14 of the next blade faces the smooth surface 15 of the installed blade. The next blade 10 is circumferentially moved to bring the smooth surface 15 of the installed blade into contact with the roughened surface 14 of the next blade 10. A load is further added circumferentially by use of the power to be used in the movement. Thus, the roughened surface 14 is pressed, leveled, plastically deformed, and hardened to receive a residual stress. The next blade 10 is connected and moved to receive a circumferential load. A series of procedures is repeated to dispose a plurality of blades 10 in the circumferential direction of a turbine rotor 20. <P>COPYRIGHT: (C)2013,JPO&INPIT |
