Patent ID: 9551224
Date: 2017-01-24
CPC Classifications: F01D

Claim:
1. A turbine comprising: a shaft body supported rotatably; a plurality of turbine blade members that is provided on an outer periphery of the shaft body and constitutes a turbine blade row in a circumferential direction of the shaft body; a casing covering the shaft body and the turbine blade row; an outer ring that is provided on an inner periphery of the casing and includes an inner peripheral portion in which a cross-section having an uneven shape is continuous in a circumferential direction; a plurality of turbine vane members that each has a shroud fitted into the inner peripheral portion of the outer ring and a turbine vane main body extending from the shroud to a radially inward side and that is provided in the circumferential direction and constitutes a turbine vane row in which the shrouds adjacent to each other are aligned in the circumferential direction; and a plate member that connects at least some of the plurality of turbine vane members and covers one side of the shrouds in an axial direction, thereby sealing a shroud gap formed between the shrouds adjacent to each other in the circumferential direction, wherein the inner peripheral portion of the outer ring is formed as a groove extending in the circumferential direction, and the plate member seals at least a portion of each of the shrouds that protrude from the inner peripheral portion of the outer ring to the radially inward side of the shroud gap.