Patent ID: 8480353
Filing Date: 2013-07-09
Classification: F01D,F05D

Abstract:
1. A cooling system of a ring segment for a gas turbine, which is formed from a plurality of segment bodies disposed around a rotating shaft in an annular shape, and a seal plate for sealing a gap between end portions facing each other in a direction of the rotating shaft of the segment bodies adjacent to each other, wherein the segment body includes: first cooling passages formed from cooling passages of a first region and cooling passages of a second region, the first-region cooling passages being disposed in an axial direction of the rotating shaft of a main body of the segment body and disposed adjacent to the end portion on a rear side in a rotation direction, and the second-region cooling passages being disposed on a farther front side in the rotation direction than the first-region cooling passages and having a smaller passage cross-sectional area than the first-region cooling passages; second cooling passages disposed at one of the end portions in a direction approximately perpendicular to the first cooling passages, and blowing a cooling air toward the end portion of the neighboring segment body; and third cooling passages formed on a farther outer side in a radial direction than the first cooling passages of an upstream-end portion of the segment body, and connecting a first cavity, which is disposed approximately perpendicular to the axial direction of the rotating shaft at the upstream-end portion, with a cooling space, which is surrounded by the main body of the segment body and a collision plate having a plurality of small holes, wherein the first-region cooling passages are disposed adjacent to the second cooling passages of the neighboring segment body.