| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a rotor blade that avoids fretting damage, while restraining stress occurring at a blade neck portion due to a stress relief groove. <P>SOLUTION: There is provided the rotor blade attached to the outer periphery of a rotor. The rotor blade includes: a dovetail portion 3 for holding the rotor blade on the rotor; a platform portion 2 that connects the dovetail portion and a blade portion 1; and a stress relief groove 9 that connects the side surface 10 of the platform portion and the blade load bearing surface 4 of the dovetail portion, wherein the dovetail portion has a width that increases toward a root side thereof within a range from a connection point between the side surface of the platform portion and the stress relief groove to a connection point between the dovetail portion and the stress relief groove. <P>COPYRIGHT: (C)2013,JPO&INPIT |
