INSULATION OF A CIRCUMFERENTIAL EDGE OF AN OUTER CASING OF A TURBINE ENGINE FROM A CORRESPONDING RING SECTOR

摘要

The invention relates to a turbine stage of a turbomachine, comprising a rotor wheel mounted inside a sectorized ring carried by an outer casing (4), the outer casing (4) comprising at least one circumferential rim ( 22) housed in this cavity for the attachment of the downstream end (13) of the ring sector (6), characterized in that the bottom wall (16) of the annular cavity of the ring sector (6) remains spaced radially from the circumferential rim (22) of the outer casing (4), so as to provide a thermally insulating space between them and comprises radial positioning means (24) on the circumferential rim (22).