GAS TURBINE

摘要

In a gas turbine of the invention, a first blade ring portion to which first vanes are attached and a second blade ring portion to which second vanes are attached are integrally formed to form an integrated blade ring. A second upstream pressing member is arranged on the upstream side of a second upstream isolation ring which attaches a first ring segment and a second vane stage which is arranged on the downstream side of the first ring segment to the integrated blade ring. By attaching the pressing member to the blade ring portion, the pressing member pushes and fixes the isolation ring to the downstream side, and the sealing performance of a packing is maintained.

主权项

1. A gas turbine comprising:
a rotor having a rotor body that rotates around a rotation axis, and a plurality of blade stages that are lined up in an axial direction in which the rotation axis extends and that are fixed to the rotor body; a plurality of vane stages, each of which is arranged on the upstream side of each of the plurality of blade stages; and a casing that covers the rotor and to which the plurality of vane stages are attached to the inner peripheral side thereof; wherein the casing comprises a plurality of blade ring portions that form an annular shape around the rotation axis and that each cover one blade stage and one vane stage; a plurality of ring segments that form an annular shape around the rotation axis and that are arranged between the plurality of vane stages on the inner peripheral side of the blade ring portions and on the outer peripheral side of the blade stages; and a plurality of isolation rings for attaching the ring segments arranged on one of the upstream side and the downstream side of the vane stages; wherein two or more of the blade ring portions that are adjacent to each other in the axial direction form an integrated blade ring that is integrally formed; wherein an upstream member among the ring segments and the vane stages, which is arranged on the upstream side of a predetermined isolation ring among the plurality of isolation rings, is provided with the predetermined isolation ring, and a downstream member among the ring segments and the vane stages, which is arranged on the downstream side of the predetermined isolation ring, is provided with the predetermined isolation ring; and wherein the casing further includes a pressing member which is arranged on the upstream side of the predetermined isolation ring, which is attached to the blade ring portion, and which pushes a pressed member of at least one of the predetermined isolation ring and the upstream member to the downstream side.