Insulating a circumferential rim of an outer casing of a turbine engine from a corresponding ring sector

摘要

A turbine stage of a turbine engine, the stage including a rotor wheel mounted inside a sectorized ring carried by an outer casing, the outer casing including at least a circumferential rim housed in an annular cavity to attach a downstream end of the ring sector. A bottom wall of the annular cavity of the ring sector remains radially spaced apart from the circumferential rim of the outer casing to provide a thermally insulating space between them and includes a radial positioning mechanism acting on the circumferential rim.

主权项

1. A turbine stage of a turbine engine, the stage comprising:
a rotor wheel mounted inside a sectorized ring carried by an outer casing, each ring sector including a downstream end formed with an annular cavity defined by an upstream annular abutment, a downstream annular abutment, and a bottom wall, the outer casing including at least a circumferential rim housed in the annular cavity to attach the downstream end of the ring sector, wherein the bottom wall of the annular cavity of the ring sector remains radially spaced apart from the circumferential rim of the outer casing to provide a thermally insulating space between them and includes radial positioning means acting on the circumferential rim, the positioning means being formed by at least two studs projecting from the bottom wall of the annular cavity.