SYSTEM FOR SUPPORTING ROTOR SHAFTS OF AN INDIRECT DRIVE TURBOFAN ENGINE

摘要

In one aspect the present subject matter is directed to a system for supporting shafts of an indirect-drive turbofan engine (10). The system includes a fan frame assembly (200) that is coaxially aligned with a centerline of the turbofan engine (10) and positioned forward of a reduction gear (40) that couples a low pressure rotor shaft (36) to a fan shaft (38). A compressor frame assembly (300) is aligned with the centerline aft of the reduction gear (40) and is positioned axially between a low pressure compressor (22) and a high pressure compressor (24) of the turbofan engine (10). A turbine frame assembly (400) is coaxially aligned with the centerline and is positioned axially between a high pressure turbine (28) and a low pressure turbine (30) of the turbofan engine (10). The turbine frame assembly (400) rotatably supports an aft end portion of a high pressure rotor shaft (34) and an aft end portion of the low pressure rotor shaft (36).