Patent ID: 8133018

Claim:
A turbomachine comprising a high-pressure turbine comprising at least one upstream guide vane element formed of an annular array of fixed stator blades and an impeller mounted so as to rotate downstream of the upstream guide vane element and inside an assembly of ring sectors placed circumferentially end-to-end and supported by an annular support suspended from an outer casing, the upstream guide vane element comprising, at a radially inner end, means for attachment to an inner casing, and, at a radially outer end means for pressing axially on a fixed element that is suspended from the outer casing independently of the annular support of the ring sectors, wherein said fixed element comprises, on a radially inner portion, an annular groove oriented axially in an upstream direction and designed to receive a cylindrical rim of an outer wall of a combustion chamber arranged upstream of the upstream guide vane element, and wherein said annular groove comprises at least one lateral cylindrical surface in abutment against a cylindrical surface of said cylindrical rim for centering the outer wall of the combustion chamber relative to a longitudinal axis of the turbomachine.