| 摘要 |
PROBLEM TO BE SOLVED: To provide a cooling medium supply structure with small leakage of a cooling medium during supplying the cooling medium as well as with small head loss in a gas turbine requiring the supply of the turbine cooling medium from a stationary system to a rotary system.SOLUTION: The present turbine comprises: a stator vane row; a moving blade row arranged on the combustion gas flow direction upstream side of the stator vane row or on the combustion gas flow direction downstream side thereof; a diaphragm arranged on the rotary shaft side of the stator vane row; a spacer that connects to the rotary shaft to face the diaphragm; and a seal structure provided between the inner peripheral surface of the diaphragm and the outer peripheral surface of the spacer. The turbine further comprises: a coolant supply hole for supplying the coolant that has passed through the inner peripheral surface of the diaphragm; and a coolant introduction hole provided on the outer peripheral surface side of the spacer for introducing the coolant from the coolant supply hole to the interior of the rotary shaft, in which the radius positions of a coolant outlet of the coolant supply hole and a coolant inlet of the coolant introduction hole are established on the rotary shaft center side rather than the radius position of the leakage part of the seal structure. |
