Patent ID: 7182577

Claim:
A set of turbine rotor blades arranged in a circular cascade on a rotor disk, each having a blade profile part, a root part to be fitted axially in one of a plurality of axial disk grooves formed in the rotor disk in a circumferential arrangement, and an integral cover formed integrally with the blade profile part at the outer edge of the blade profile part; wherein a front end surface, faced in a direction in which the rotor disk rotates, of the integral cover of each turbine rotor blade is inclined to a direction in which the root part of the turbine rotor blade is fitted in the disk groove of the rotor disk, the sum of circumferential lengths of the integral covers of the turbine rotor blades is greater than a circumference of a circle passing positions at which the integral covers are attached to the outer edges of the blade profile parts, and the adjacent integral covers are brought into firm contact with each other by the resilience of the blade profile parts which are twisted when the root parts of the turbine rotor blades are fitted axially in the disk grooves of the rotor disk.