TURBINE DISC AND GAS TURBINE

摘要

A turbine disc and a gas turbine are rotatably supported by being rigidly fixed to a rotor (24), wherein a plurality of rotor blades (22a) are juxtaposed in the circumferential direction at the outer circumferential portion. First cooling holes (42) which penetrate the turbine disc from the inside toward the outside and communicate with cooling passages (41) in the rotor blades (22a) are juxtaposed in the circumferential direction, and a second cooling hole (43) which penetrates the turbine disc from the inside toward the outside is provided between the first cooling holes (42). The first cooling hole (42) and the second cooling hole (43) are interconnected through a radial interconnection passage (47), so that concentration of stress is relaxed, thus enhancing durability.