| 摘要 |
PURPOSE:To improve a gas turbine in its operating efficiency, by arranging such that while the head portion of stationary blade is formed with a ceramics and a hole and the like are provided in the platform of stationary blade and a shroud for securing the head portion therein, a small diameter hole is bored in the interior surface of hole and the like. CONSTITUTION:The head portion 12 of stationary blade 1 is separated away from a body portion 13 by a curved, or a bent line and the like such that its dividing line may take a large contact angle relative to the outer surface of blade, the curved or the bent line providing the body 13 side with a convexed portion. The head portion 12 is formed with a ceramics. On the other hand, the body 13, the platform 18 and the shroud 19 are formed with a heat resistant alloy. A hole 21 and a recess 22, slightly larger than the diameter of head portion 12 are defined in the platform 18 and the shroud 19. The head portion 12 is inserted into the recess 22 through the hole 21, and a cap 20 is placed over the hole 21. A cooling air blow-off port 24 with a reduced diameter is bored through the platform 18, the shroud 19 and the cap 20. By so arranging, it becomes unnecessary to lower the volume of cooling air and the pressure of the main stream gas, thereby achieving the object of present invention. |
