Westinghouse Gas Turbine-Gearbox-Generators use bearings in the gearbox that are easily damaged if the unit is operated at low MW Load. The journals of a gear shaft contact the bearings in a manner to limit the oil flow into the bearings, causing the bearings to overheat.
TRI used the TRI Proprietary Bearing Computer simulation program which incorporates completely non-linear time transient solution techniques to model the bearings. The existing bearings were modeled and the problems with them were identified. New TRI bearings were designed and the orientations of the split lines of the bearings were optimized. Temperature sensing instrumentation was installed to be able to measure the bearing metal temperatures in the load zones. Then the bearings were manufactured and installed with the expected satisfactory performance, including acceptable temperatures.