Patent ID: 7198463

Claim:
A rotating blade body comprising: a rotor disc; and a plurality of rotating blades assembled so as to extend from an outer circumference of the rotor disc in a radial pattern, wherein blade root portions of the rotating blades are engaged into blade grooves which are formed along a direction of a rotating shaft on an edge of the outer circumference of the rotor disc; wherein circulation spaces for cooling air are formed along a direction of a rotating shaft between bottom-end portions of blade root portions of the rotating blades and bottom portions of blade grooves of the rotor disc; and into these circulation spaces are inserted and engaged pushing-up members which push up the rotating blades outward in a radial direction, maintaining circulation of the cooling air, wherein the pushing-up member is a leaf spring which is curved in a rotation direction of the rotating shaft, wherein the leaf spring includes both end portions which are in contact with the bottom surface of bottom portion of a blade groove of the rotor disc and a middle portion which is in contact with the bottom-end portion of a blade root portion of the rotating blade, and wherein the middle portion of the leaf spring has mountain portions formed toward the bottom-end portion of a blade root portion of the rotating blade, and the mountain portions are in contact with the bottom-end portion of a blade root of the rotating blade.