초록 ▼

A seal plate at the platform portion of a gas turbine moving blade. The seal plate is inserted in a gap between the adjacent platforms at each end portion of a seal pin to prevent air from leaking to the outside. A groove is providedat each of four corners of the end portion of platform of the movin

A seal plate at the platform portion of a gas turbine moving blade. The seal plate is inserted in a gap between the adjacent platforms at each end portion of a seal pin to prevent air from leaking to the outside. A groove is providedat each of four corners of the end portion of platform of the moving blade, and the seal plate is inserted to cover the gap so as to extend the end portions of the adjacent platforms, by which the gap between the platforms is blocked. A seal pin and end seal pins are inserted between the platforms to seal this portion. However, there is a gap at the end portions, so that cooling air leaks from the lower part of platform. Since the seal plate is inserted in the groove to block the gap, the sealing property is increased.

대표청구항 ▼

[ We claim:] [1.] A rotating blade row for a gas turbine, comprising:a plurality of moving blades adapted to be adjacently arranged around a circumference disposed about a longitudinal axis of the gas turbine, each moving blade including a platform which has opposite sides that confront the correspo

[ We claim:] [1.] A rotating blade row for a gas turbine, comprising:a plurality of moving blades adapted to be adjacently arranged around a circumference disposed about a longitudinal axis of the gas turbine, each moving blade including a platform which has opposite sides that confront the corresponding platforms of adjacent moving blades, each platform including a forward flange portion and an aft flange portion, each flange portion defining two opposite corners spaced from corresponding corners of flange portions of adjacent moving blades;seal pins inserted between adjacent platforms of the moving blades to prevent cooling air from leaking from lower parts of the moving blades between the adjacent platforms, the seal pins including forward ends proximate forward edges of the platforms and aft ends proximate aft edges of the platforms;grooves formed at the four corners of the flange portions of each platform, each groove extending substantially longitudinally and circumferentially, the grooves at the forward edges of the platforms extending longitudinally such that the grooves overlap the forward ends of the seal pins, and the grooves at the aft edges of the platforms extending longitudinally such that the grooves overlap the aft ends of the seal pins; anda seal member inserted in each pair of adjacent grooves in the forward and aft flange portions of the moving blades so as to extend across gaps between the adjacent comers thereof to seal the gaps between the platforms, the seal members at the forward and aft edges of the platforms being disposed in the grooves so as to respectively overlap the forward and aft ends of the seal pins.