Patent ID: 11959392
Assignee: MITSUBISHI ELECTRIC CORPORATION
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 9:
10. A rotor blade to be attached to a rotor shaft rotatable about an axis, the rotor blade comprising:
a blade body extending in a radial direction with respect to the axis and having a blade-shaped cross-section orthogonal to the radial direction;
a fillet portion provided on a radial outer side of the blade body and having a hollow portion formed therein;
a shroud provided on a radial outer side of the fillet portion and extending in a circumferential direction; and
a seal fin projecting from the shroud to an outer circumferential side and extending in a direction intersecting the blade body when viewed from the radial direction,
wherein a wall thickness on a pressure side of the fillet portion is greater than a wall thickness on a suction side of the fillet portion on a trailing edge side of the blade body as demarcated by an intersection portion between the blade body and the seal fin serving as a boundary, and
a height of the hollow portion in the radial direction is at a minimum at the intersection portion between the blade body and the seal fin, and is greater than the height at the intersection portion at at least a part of a leading edge side and the trailing edge side.