Patent ID: 11959394
Assignee: MITSUBISHI ELECTRIC CORPORATION
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 12:
13. The turbine rotor blade according to claim 8,
wherein the turbine rotor blade further comprises a pressure side fillet portion formed in a connection between the pressure surface and the upper surface of the platform portion,
wherein a central fillet portion which is formed at a position including a center of a length of the pressure side fillet portion along an extension direction of the pressure side fillet portion,
wherein a fillet height of the central fillet portion in the pressure side fillet portion is higher than the fillet height of the central fillet portion in the suction side fillet portion,
wherein a boundary line between the suction surface and the upper surface of the platform portion includes two suction side sections overlapping the shank portion as viewed in the blade height direction,
wherein a boundary line between the pressure surface and the upper surface of the platform portion includes one pressure side section overlapping the shank portion as viewed in the blade height direction,
wherein the upstream intermediate fillet portion is formed along at least a part of one of the two suction side sections,
wherein the downstream intermediate fillet portion is formed along at least a part of the other of the two suction side sections, and
wherein the central fillet portion of the pressure side fillet portion is formed along at least a part of the one pressure side section.