Gas turbine stationary blade

F - Mech Eng,Light,Heat,Weapons – 01 – D

Patent

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F01D 9/02 (2006.01) F01D 5/08 (2006.01) F01D 5/18 (2006.01)

Patent

CA 2214826

A gas turbine stationary blade, having a simple structure in which sufficient cooling is achieved and the drop in pressure of cooling vapor is decreased so that the turbine efficiency is prevented from lowering. The shape of a vapor passage is simplified to prevent the drop in pressure because an outer shroud (3) of the stationary blade and a blade unit (2) are cooled with vapor, while an inner shroud (4) is cooled with the air supplied from another system.

Cette invention concerne une aube stationnaire de turbine à gaz dotée d'une structure simple dans laquelle d'une part, un refroidissement suffisant est obtenu et d'autre part, la chute de pression de la vapeur de refroidissement est réduite de manière à ce que le rendement de la turbine ne puisse diminuer. La forme d'un passage à vapeur est simplifiée de façon à éviter la chute de pression du fait qu'une enveloppe externe (3) de l'aube stationnaire et une unité à aubes (2) sont refroidies avec de la vapeur, tandis qu'une enveloppe interne (4) est refroidie avec l'air provenant d'un autre système.

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