Patent ID: 11946390
Assignee: KAWASAKI JUKOGYO KABUSHIKI KAISHA
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 4:
5. A disc of a rotating body, the disc being configured to be implanted with a rotor blade, the disc comprising a blade groove, wherein
in a cross-sectional shape of the blade groove, the blade groove includes at least one stage of recessed parts recessed toward opposite sides with respect to a direction containing a circumferential component, the recessed parts being configured to lock a blade root of the rotor blade to the disk,
each of the recessed parts has a contact surface configured to come into contact with the blade root, inclined so as to extend toward a center part of the blade groove from a radially inside to a radially outside, and facing towards the radially inside, and
each of the recessed parts has a non-contact surface configured not to come into contact with the blade root, inclined so as to extend toward the center part of the blade groove from the radially inside to the radially outside, and facing towards the radially outside, and
each of the recessed parts is configured to recess, away from a center part of the blade root, moreso in a radial direction towards a radial center of the disc than in a circumferential direction away from the center part of the blade root.