AIRCRAFT ENGINE WITH INTER-TURBINE ENGINE FRAME SUPPORTED COUNTER ROTATING LOW PRESSURE TURBINE ROTORS

摘要

An aircraft gas turbine engine assembly includes an inter-turbine frame (6 0) axially located between high and low pressure turbines (24, 26). Low pressur e turbine (26) has counter rotating low pressure inner and outer rotors (200,202) with low pressure inner and outer shafts (130,140) which are at least in part rotatab ly disposed co- axially within a high pressure rotor (33). Inter-turbine frame (60) includes radially spaced apart radially outer first and inner second structural rings (86, 88) disposed co- axially about a centerline (8) and connected by a plurality of circumferentially spaced apart struts (90). Forward and aft sump members (104, 106) having forward an d aft central bores (84, 85) are fixedly joined to axially spaced apart forward an d aft portions (108, 110) of the inter-turbine frame (60). Low pressure inner and outer rotors (200,202) are rotatably supported by a second turbine frame bearing (76) mounted in aft central bore (85) of aft sump member (106). A mount (120) for connecting the engine to an aircraft is located on first structural ring (86).