SPLIT RING COOLING STRUCTURE AND GAS TURBINE

摘要

Disclosed is a split ring cooling structure of a gas turbine. The split ring cooling structure is provided with: first cooling channels arranged in the axial direction of the rotating shaft of split bodies; second coaling channels which are arranged in one of the side end sections in the direction nearly orthogonal to the first cooling channels and eject cooling air toward the side end section of the adjacent split body; and third cooling channels which interconnect the cooling space surrounded by the split bodies and a collision plate provided with many small openings and a first cavity arranged in the upstream side end section while being nearly orthogonal to the axial direction of the rotating shaft. The first cooling channels include: cooling channels in a first area which are arranged in proximity to the side end section on the rear side in the direction of the rotation; and cooling channels in a second area which are arranged forward of the cooling channels in the first area in the direction of the rotation. The cooling channels in the second area have smaller cross sectional areas and larger any pitches than the cooling channels in the first area. The cooling channels in the first area are arranged in the proximity of the second cooling channels of the adjacent split body.