Patent ID: 11867088
Assignee: MITSUBISHI ELECTRIC CORPORATION
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 0:
1. A turbine blade, comprising:
a platform;
an airfoil portion extending from the platform in a blade height direction and having a pressure surface and a suction surface extending between a leading edge and a trailing edge;
a blade root portion disposed on opposite side of the airfoil portion across the platform in the blade height direction and having a bearing surface; and
a shank disposed between the platform and the blade root portion,
wherein the shank has:
a first lateral surface having a first recess portion and disposed on a pressure surface side and along an extension direction of the blade root portion; and
a second lateral surface having a second recess portion and disposed on a suction surface side and along the extension direction of the blade root portion,

wherein in a cross-section of the shank orthogonal to the blade height direction,
the first recess portion and the second recess portion include a central position of the shank in the extension direction of the blade root portion, and
a formation length of the first recess portion along the extension direction of the blade root portion is larger than a formation length of the second recess portion along the extension direction of the blade root portion.