Patent ID: 8261556

Claim:
A device for guiding an element in an orifice in a wall of a turbomachine combustion chamber, the device comprising: a ring and a bushing that are substantially coaxial, one being mounted in the other, the ring being designed to have the element passing axially therethrough and having an outer annular rim that is guided transversely in an inner annular groove of the bushing that is designed to be fastened to the edge of the orifice in the wall of the combustion chamber, the bushing comprising two coaxial annular parts fastened to each other by brazing or welding and defining between them the annular groove for guiding the rim of the ring, and the device having at least one privileged transverse direction for movement of the ring, wherein one of the two parts of the bushing is a washer having an outer peripheral edge having at least two portions which are fastened via welding or brazing to the other of the two parts of the bushing and at least two portions which are not fastened to the other of the two parts of the bushing, said at least two non-fastened portions being diametrically opposite about an axis of the bushing and being in alignment on an axis which is parallel to the at least one privileged transverse direction for movement of the ring, said at least two fastened portions being regularly distributed around the axis of the bushing, and wherein the other of the two parts of the bushing comprises a continuous cylindrical rim extending around the outer annular rim of the ring, said at least two non-fastened portions being free of contact against said continuous cylindrical rim and are located radially inward thereto and spaced apart therefrom, so as to leave spaces for passing and guiding ventilation air between the washer and the continuous cylindrical rim.