Patent ID: 7131813
Filing Date: 2006-11-07
Classification: F01D,F05D,Y02E,Y02T

Abstract:
1. A turbine shaft in a turbine engine, comprising: a first cooling circuit characterized by a first region separated flow wise from a third region by a second region, said first cooling circuit being further characterized by a fourth region, a fifth region and a sixth region connected flow wise to one another to pass fresh air but separated flow wise from the first, second, and third regions; a second cooling circuit characterized by a first region separated flaw wise from a third region by a second region, said second cooling circuit being further characterized by a fourth region, a fifth region and a sixth region connected flow wise to one another to pass fresh air but separated flow wise from the first, second, and third regions; wherein each first region is in communication flow wise with a source of live steam during operation, and whereby each of the cooling circuits is effective to maximize cooling efficiency by delivering live steam to each of the cooling circuit first regions and by delivering fresh air through the fourth, fifth and sixth regions.