Turbomachine rotor with anti-wear shim between a disk and an annulus
AssigneeSnecma
InventorsMichael Delapierre, Patrick Jean-Louis Reghezza
Life of this patent
Estimating the term…
Abstract
A turbomachine rotor including a disk with a rim and axial cavities machined into the rim to individually house blades; and an annulus attached to one side of the rim and pierced with stress-relief holes, in which part of the stress-relief holes are situated in the axial continuation of the cavities, is disclosed. An annular shim is attached and interposed between the disk and the annulus, the shim forming a removable device for closing off the holes and an axial bearing surface against which the blades housed in the cavities can bear.
Claims9
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.
An annular component shaped so as to be used as an annular shim in 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 one side of the rim, in which the annular component is attached and interposed between the disk and the annulus, the annular component forming a removable means of closing off 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 annular component 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 annular component, and
- wherein a radial width of the annular component is greater than a diameter of the stress-relief holes,
- 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.
Dependencies are inferred from the claim text.