Patent ID: 8911212
Filing Date: 2014-12-16
Classification: F01D,F04D,F05D,Y02T

Abstract:
1. A turbomachine rotor comprising: a disk with a rim and axial cavities machined into the rim to individually house blades; an annulus pierced with stress-relief holes, part of the stress-relief holes being situated in an axial continuation of the cavities, the annulus being attached to a downstream side of the rim; and an annular shim attached and interposed between the disk and the annulus, the shim being removable, closing off the at least one of the stress-relief holes, and presenting an upstream axial bearing surface against which the blades housed in the cavities can bear, wherein an upstream face of the annulus includes an annular groove machined therein, the groove presenting a width in a radial direction which encompasses all of the stress-relief holes, and the shim being housed entirely in the groove such that the upstream face of the annulus is in a same plane as an upstream face of the shim, wherein the annulus includes an upstream flange including retaining scallops at a radially inner edge of the upstream flange which open towards an axis of the annulus, the stress-relief holes being disposed radially outside of the scallops, and the groove being machined in an upstream face of the upstream flange.