Patent ID: 7025562

Claim:
A cooling device for cooling disks of high-pressure and low-pressure turbines of a turbomachine, said device being fed with cooling air from air orifices formed through a bottom annular platform for supporting at least one fixed vane of said low-pressure turbine and being disposed between an upstream flange and a downstream flange of said bottom platform, the device comprising: an upstream annular plate extending radially from the upstream flange of said bottom platform; a downstream annular plate 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 formed by a top zone fed with cooling air by said air orifices and by a bottom zone in communication with said top zone via a plurality of openings, said bottom zone being in radial alignment with said air orifices and said openings; a sealing device extending longitudinally between said upstream and downstream plates so as to close the cooling air cavity in a leaktight manner; holding means for holding said upstream and downstream plates against the upstream and downstream flanges of said bottom platform; and a plurality of holes leading into the bottom zone of the annular cavity and opening out towards the turbine disks for injecting cooling air.