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

Claim 7:
8. A rotating body comprising:
a plurality of rotor blades, each rotor blade configured to be implanted in a disc of a rotating body, the rotor blade comprising a blade root, wherein
in a cross-sectional shape of the blade root, the blade root includes at least one stage of protruding parts protruding toward opposite sides with respect to a direction containing a circumferential component, the protruding parts being configured to lock the blade root to the disc,
each of the protruding parts has a contact surface configured to come into contact with the disc, inclined so as to extend toward a center part of the blade root from radially inside to a radially outside, and facing towards the radially outside,
each of the protruding parts has a non-contact surface configured not to come into contact with the disc, inclined so as to extend toward the center part of the blade root from the radially inside to the radially outside, and facing towards the radially inside, and
each of the protruding parts is configured to protrude, from the 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
the rotor blades being implanted in the rotating body; and

a disc of a rotating body, the disc being configured to be implanted with a rotor blade, the disc comprising blade grooves, wherein
in a cross-sectional shape of a blade groove of the blade grooves, 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 radially inside to 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 insideoutside,
the disc having blade grooves shaped so as to receive blade roots of the rotor blades.