초록 ▼

A sealing device for a gas turbine stator blade, in which an outer shroud (32) is mounted by heat insulating rings (32a,32b) on a blade ring (50). The blade ring (50) has a first air hole (1), which communicates with a space (53), and a second air hole (51), which communicates with a seal tube (2).

A sealing device for a gas turbine stator blade, in which an outer shroud (32) is mounted by heat insulating rings (32a,32b) on a blade ring (50). The blade ring (50) has a first air hole (1), which communicates with a space (53), and a second air hole (51), which communicates with a seal tube (2). The seal tube (2) is inserted into the second air hole (51), and a spring (6) is arranged between a projection (4) of the tube (2) and a retaining portion (5) of the air hole (51) to removably secure the seal tube (2). Cooling air (54) flows through the first air hole (1) to cool the shrouds and the inside of a stator blade (31) until it is released from the trailing edge of the blade. The cooling air also flows into a cavity (36) so that a high pressure can be maintained without a pressure loss because the tube (2) is independent of the space (53) in the blade ring.

대표청구항 ▼

[ What is claimed is:] [1.]1. A sealing device for a gas turbine stator blade, in which air is guided from air holes formed in a blade ring through a space formed by said blade ring, a heat insulating ring and an outer shroud, the air being further guided from said space through a seal tube in the s

[ What is claimed is:] [1.]1. A sealing device for a gas turbine stator blade, in which air is guided from air holes formed in a blade ring through a space formed by said blade ring, a heat insulating ring and an outer shroud, the air being further guided from said space through a seal tube in the stator blade into an inner shroud, such that a pressure in a cavity of said inner shroud may be maintained at a higher pressure than that in a combustion gas passage to seal the interior of said inner shroud,wherein said air holes include a first air hole communicating with said space, and a second air hole communicating with said seal tube.