Patent ID: 7789619

Claim:
A device for attaching ring sectors around a turbine rotor in a turbomachine, each ring sector comprising: a frustoconical wall that supports a block of abradable material attached to a radially inner surface of the frustoconical wall; a circumferential rim disposed at an upstream end of the ring sector which is engaged in a radially inner annular groove of an annular casing rail and held radially in the groove by a C-section annular locking member that is engaged axially from upstream on the casing rail and on the circumferential rims of the ring sectors; and a pressing part disposed at a downstream end of the ring sector that is fitted and attached to the radially inner surface of the frustoconical wall and to the block of abradable material of the ring sector, wherein the part presses axially against a fixed element of the turbine to prevent the upstream circumferential rim from disengaging from the wall of the locking member, and wherein the axial clearance between the pressing part and the fixed element is less than the axial length of a bearing surface of the upstream rim of the wall on the locking member.