Device for cooling turbine disks

Details Device for cooling turbine disks Device for cooling turbine disks

F - Mech Eng,Light,Heat,Weapons

01

D

F01D 5/08 (2006.01)

Patent

CA 2456700

A cooling device (30) for cooling disks (14, 22) of high-pressure and low-pressure turbines (10, 16) of a turbomachine, said device being fed with cooling air from at least one air orifice (44) formed through a bottom annular platform (28) for supporting at least one fixed vane (24) of said low-pressure turbine and being disposed between an upstream flange (36) and a downstream flange (38) of said bottom platform, the device comprising: an upstream annular plate (32) extending radially from the upstream flange of said bottom platform; a downstream annular plate (34) extending radially from the downstream flange of the bottom platform, said upstream and downstream plates longitudinally defining at least one annular cavity for cooling air; a sealing device (42) extending longitudinally between said upstream and downstream plates so as to close the cooling air cavity in leaktight manner; holding means (83) for holding said upstream and downstream plates against the upstream and downstream flanges of said bottom platform; and a plurality of holes (70) for injecting cooling air towards the turbine disks.

Dispositif de refroidissement (30) de disques (14, 22) de turbines (10, 16) haute-pression et basse-pression de turbomachine, ledit dispositif étant alimenté en air de refroidissement depuis au moins un orifice d'air (44) pratiqué au travers d'une plate-forme annulaire inférieure (28) de support d'au moins une aube fixe (24) de ladite turbine basse-pression et disposé entre une bride amont (36) et une bride aval (38) de ladite plate-forme inférieure, le dispositif comportant : un flasque annulaire amont (32) s'étendant radialement depuis la bride amont ; un flasque annulaire aval (34) s'étendant radialement depuis la bride aval, lesdits flasques amont et aval délimitant longitudinalement au moins une cavité annulaire d'air de refroidissement ; un dispositif d'étanchéité (42) s'étendant longitudinalement entre lesdits flasques amont et aval de façon à obturer de manière étanche la cavité d'air de refroidissement ; des moyens de maintien (83) desdits flasques amont et aval contre les brides amont et aval; et une pluralité de perçages (70) afin d'injecter de l'air de refroidissement vers les disques de turbines.

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