FIELD: turbines or turbomachines.
SUBSTANCE: turbine disk rim assembly comprises a plurality of crown sectors made from a ceramic matrix composite material forming a turbine disc rim, and rim support structure having first and second annular flanges. Each crown sector comprises first and second tabs retained between two ring flanges of crown support structure. Each of the first and second lugs of the crown sectors has an annular groove. Each of the first and the second ring flanges has an annular ledge inserted into the annular groove of the first tabs or in the annular groove of the second lugs of each sector of the rim. Between the annular projection of the first flange and annular grooves of the first tabs and between the annular projection of the second flange and annular grooves of the second tabs there is an elastic element.
EFFECT: invention provides reliable retention of ring sectors and compensate for difference in thermal expansion of sectors and supporting structure.
8 cl, 12 dwg
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