| 摘要 |
PROBLEM TO BE SOLVED: To completely avoid axial directional force produced with respect to a rotor in rotor blades due to thermal stress and at the same time to perfectly eliminate separation of the individual rotor blades based on a gap interval. SOLUTION: A platform 31, disposed between a blade root 36 and a blade leaf 32, has two side flanks 33 and 34, and a circumferential groove 1 has an inside border for receiving the blade root 36. The side flanks 33 and 34 of the platform 31 of the rotor blade 3, positioned in the circumferential groove 1, are inclined obliquely to a rotor axial line 4, and an abutting surface 52 acted and connected to the blade root is disposed in a region of the blade root 36 which reaches the inside of the circumferential groove 1. The abutting surface is directed in parallel to the rotor axis 4, and adjacently inserted rotor blades 3 are loosely frictionally interconnected in the circumferential groove 1 via the abutting surface 52, directed in parallel with the rotor axis 4.
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