TURBINE RING ASSEMBLY WITHOUT A MOUNTING GAP IN A COLD STATE Russian patent published in 2020 - IPC F01D25/24 F01D11/08 

FIELD: turbines or turbomachines.

SUBSTANCE: invention relates to a turbine ring assembly comprising a plurality of sectors (10) of a composite material ring with a ceramic matrix, forming turbine ring (1), and a ring attachment structure (3), comprising first and second annular flanges (32, 36), wherein each ring sector has first and second tabs (14, 16) held between two annular flanges (32, 36) of ring attachment structure (3). First and second fastening elements (40, 41), fixedly connected to first circular flange (32), come into first and second holes (142, 143) of first tab (14), while first and second fastening elements, rigidly connected with second annular flange (36), enter first and second holes of second tab (16). In the cold state between the holes and part of the fastening elements located in the above holes there is a radial gap. First and second annular flanges (32, 34) comprise on their side opposite first and second tabs (14, 16) a plurality of support portions (34, 38), distributed in circumferential direction on flanges, at that end (141, 161) of first and second tabs (14, 16) of each ring sector is in cold state in position of radial thrust in two support sections (34, 36).

EFFECT: allows to leave static gap in cold state between fastening elements, fixedly connected to annular flanges of ring attachment structure, and holes, made in laps of ring sectors, at the level of the fastening elements zone, different from the zone coming into contact with the holes; this allows to compensate for insufficient holding of support sections in hot state, associated with expansion of ring attachment structure, due to expansion of fasteners in holes of rings of ring sectors, which reduce the static gap present in cold state.

7 cl, 14 dwg