Patent ID: 8087879

Claim:
A device for cooling the slots in a turbomachine rotor disk, the device comprising: a rotor disk comprising: at its periphery, a plurality of substantially axial slots that are regularly distributed around the axis of rotation of the disk; and an annular flange extending upstream from an upstream radial face of the disk; a plurality of blades each having a root mounted in a corresponding slot in the rotor disk; a retaining annulus having an end that is mounted against the upstream radial face of the disk and an annular flange that extends upstream from said upstream radial face of the disk and that is placed around the flange of the disk, while co-operating therewith to leave an annular space forming a cooling air diffusion cavity, this diffusion cavity opening out at its downstream end into the bottom of each of the disk slots, at the upstream ends thereof; and a plurality of air admission orifices regularly distributed around the axis of rotation of the disk and opening out into the diffusion cavity at the upstream end thereof; wherein the end of the retaining annulus that is mounted against the upstream radial face of the disk includes a plurality of openings distributed around the axis of rotation of the disk and opening out axially into the bottom of each of the slots in the disk, at the upstream ends thereof.