EXHAUST CASE FOR A TURBOMACHINE WITH A FLEXIBLE HUB

摘要

The aim of the invention is to render compatible the stresses of static force resistance and of fatigue life resistance of an exhaust case. To this end, a part is provided that can absorb compression and traction under a temperature gradient. A turbomachine exhaust case comprises, from the outside towards the inside, yokes (16), a ring (12) and a hub (20) that are annular and coaxial (X'X). The hub (20) is connected to the ring (12) by radially arranged arms (14). It extends between an annular plate (15) and an inner ring (18, 18a) that can guide the gas flow. According to one mode of embodiment, each arm (14) has a rib (14a) in the hub (20), in the form of a triangle (14c, 14c', I) ended by the plate (15). The inner ring (18) extends into the hub (20) by a flange (22) that can transfer the forces between the plate (15) and the suspension yokes (16). The flange (22) is advantageously inclined in relation to a radial plane (RR'). Two portions (19) that close an opening (17; 17a to 17c) formed in a minimum stress region along the flange (22) are intercoupled, with pre-regulated play.