Patent ID: 7640752

Claim:
A device for guiding an element in an orifice in a wall of a turbomachine combustion chamber, comprising a ring and a bush which are substantially coaxial and mounted one inside the other, the ring being intended to be traversed axially by the element and comprising an external annular rim guided transversely in an internal annular channel of the bush intended to be fastened to the edge of the orifice in the wall of the combustion chamber, the ring and the bush delimiting around the element a cylindrical annular passage opening into the chamber, wherein the device comprises an air circulation circuit formed in the ring and/or in the bush and distributed about their axis so as to establish an air circulation in the cylindrical passage from the outside of the combustion chamber toward the inside, wherein said ring comprises a frustoconical part connected to the ring between the external annular rim of the ring and an internal cylindrical surface situated between said frustoconical part and said element, and wherein the air circulation circuit comprises axial splines formed in said internal cylindrical surface of the ring, said splines being regularly distributed around the axis of the ring.