Patent ID: 8511986

Claim:
A bearing mounting system for supporting a low pressure turbine in a gas turbine engine, the bearing mounting system comprising: a low pressure shaft configured to rotate about an engine centerline; a single support rotor connecting the low pressure shaft with a plurality of low pressure turbine blades; a platform comprising: a radially extending portion coupled to the single support rotor at a spline; and an axially extending portion spaced radially from the low pressure shaft by the radially extending portion to define a pocket; a forward bearing support and an aft bearing support that straddle the support rotor; wherein the forward bearing support and the aft bearing support provide direct rigid connections to a low pressure turbine case surrounding the low pressure turbine blades; wherein the forward bearing support includes a radially extending strut that connects to the low pressure turbine case through a mid-turbine frame and a forward exit guide vane; and wherein the aft bearing support includes: a radially extending strut that connects to the low pressure turbine case through an aft exit guide vane; and a flange coupled to the radially extending strut adjacent the low pressure shaft to define a space for retaining lubrication oil; a forward bearing disposed between the axially extending portion of the platform and the radially extending strut of the forward bearing support; and an aft bearing disposed between the flange of the aft bearing support and the low pressure shaft.