Rotating blade body
A rotating blade body is provided that can restrain vibrations of rotating blades effectively. The rotating blade body comprises a rotor disc, a plurality of rotating blades being assembled so as to extend from the outer circumference of the rotor disc in a radial pattern, and sealing pins extending along the direction of the rotating shaft in the gaps between the platforms of the rotating blades being adjacent in a circumferential direction. The sealing pins have a through-hole made therein, penetrating axially from one end surface to the other end surface.
1. A rotating blade body comprising a rotor disc rotating with a main shaft in an integrated manner and a plurality of rotating blades being assembled so as to extend from an outer circumference of the rotor disc in a radial pattern:
wherein a column-shaped sealing pin that extends along the direction of the shaft is provided in each gap between platforms of rotating blades being adjacent in the circumferential direction,
wherein the sealing pin comprises a circular hole formed therethrough to penetrate in an axial direction from one end face of the sealing pin to another end face of the sealing pin; and
wherein the sealing pin having the hole formed therethrough is formed by boring a tubular or cylindrical member, the sealing pin being solid except where the hole is formed and being seamless in the axial direction.
2. A rotating blade body as described in claim 1 ,
wherein, the ratio of weight of the sealing pin that has the hole provided thereto versus weight of a sealing pin that does not have the hole is within a range between 40% and 90%.
3. The rotating blade body as described in claim 1 ,
wherein, at least one of both ends of the holes is plugged.
4. The rotating blade body as described in claim 1 , wherein the sealing pins are formed of a same material as the rotating blades.
5. The rotating blade body as described in claim 1 , wherein, as a result of the sealing pins having the hole formed therethrough, a natural frequency of the rotating blades is so adjusted as to be out of a resonance zone.