Patent ID: 7909588

Claim:
A subassembly for rotating equipment comprising: a modular rotor assembly, comprising: a one-piece carrier having a cylindrical exterior extending from a first end to a second end, a cylindrical interior extending from the first end toward the second end, a radial opening extending through the cylindrical interior and the cylindrical exterior between the first and second ends, an axial oil passage extending parallel to a longitudinal axis between the cylindrical exterior and the cylindrical interior, a first radial oil passage extending crosswise to the longitudinal axis from the axial oil passage through the cylindrical interior to a first bearing support region within the cylindrical interior, and a second radial oil passage extending crosswise to the longitudinal axis from the axial oil passage through the cylindrical interior to a second bearing support region within the cylindrical interior; a first bearing at a first fixed position within the first bearing support region within the cylindrical interior; a second bearing at a second fixed position within the second bearing support region within the cylindrical interior; a shaft extending through the first and second bearings, wherein the shaft is configured to rotate about the longitudinal axis; a gear coupled to the shaft, wherein the first and second fixed positions of the first and second bearings maintain alignment of the gear with the radial opening in the one-piece carrier; and an end plug disposed inside of the cylindrical interior at the first end, wherein the end plug seals the first end, and the shaft does not extend through the end plug.