Gas turbine stator

Details Gas turbine stator Gas turbine stator

F - Mech Eng,Light,Heat,Weapons

01

D

F01D 5/08 (2006.01) F01D 11/00 (2006.01)

Patent

CA 2466215

The invention concerns a gas turbine stator comprising: at least first injection means (1) providing a passage for main cooling air stream into a pressurized chamber (16), means for evacuating discharge air coming from an internal labyrinth gland (13) of a first cavity (9) towards a lower-pressure second cavity (10), second injection means for evacuating the air contained in said second cavity (9) towards a main duct. The inventive stator is characterized in that it further comprises third injection means designed to generate an overpressure close to the internal labyrinth gland (13a, 13b) in said pressurized chamber (16).

La présente invention concerne un stator pour turbomachine comprenant: des premiers moyens d'injection (1) permettant le passage d'un flux principal d'air de refroidissement dans une chambre sous pression (16), des moyens d'évacuation d'air de fuite provenant d'un joint à labyrinthe interne (13), d'une première cavité (9) vers une second cavité (10) de pression inférieure, des seconds moyens d'injection aptes à évacuer l'air contenu dans ladite seconde cavité (9) vers une veine principale. Le stator selon l'invention est réalisé de telle sorte qu'il comprend en outre des troisièmes moyens d'injection aptes à créer une surpression d'air proche du joint à labyrinthe interne (13a, 13b) dans ladite chambre sous pression (16).

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