Retaining ring assembly and supporting flange for said ring

An assembly comprising:

• a ring for retaining at least one blade of a rotor disk in a turbo-machine;
• and
• a flange for supporting the ring, the flange and the ring being revolution parts with an axis X, the flange comprising an attachment edge configured to be connected to the rotor disk and a free edge for bearing against the retaining ring,
• wherein the free edge of the flange radially extends and presents a downstream facing bearing face which abuts an upstream facing bearing face of the ring, the bearing face of the flange obliquely extending downstream with respect to the axis of revolution X of the parts in a radial plane going through the axis of revolution X so that a lower radial end of the bearing face of the flange is further downstream than an upper radial end of the bearing face of the flange,
• wherein the bearing face of the ring obliquely extends upstream with respect to the axis of revolution X of the parts in a radial plane going through the axis of revolution X so that a lower radial end of the bearing face of the ring is further downstream than an upper radial end of the bearing face of the ring,
• wherein the bearing face of the free edge of the flange presents a bulge having a curved shape in a radial plane going through the axis of revolution X such that the bearing face of the flange and the bearing face of the ring are in contact according to an annular circumferential bearing line,
• wherein a radially inner end of the ring extends radially inward of the bulge of the bearing face of the free edge of the flange, and
• wherein a bearing force of the flange on the ring possesses an axial component and a radial component relative to the axis of revolution X.