A Test Stand for Dynamic Characterization of Oil-Free Bearings for Modern Gas Turbine Engines

Swanson, E.E., Walton II, J.F. and Heshmat, H. “A Test Stand for Dynamic Characterization of Oil-Free Bearings for Modern Gas Turbine Engines,” ASME Paper GT2002-30005, 2002 ASME Turbo Expo: Land, Sea and Air, June 2002, Amsterdam, The Netherlands, (2002) American Society of Mechanical Engineers, International Gas Turbine Institute, Turbo Expo (Publication) IGTI, Volume 1, pp. 39-48.

A multi-purpose rotor-dynamic simulator was designed and fabricated for the purpose of experimentally evaluating and validating performance of advanced oil-free and back-up bearings under realistic dynamic conditions.  The rotor-bearing dynamic test rig is capable of operation to 25,000 rpm, has a 54 kg test rotor, is designed to simulate a medium size aero gas turbine engine rotor, and incorporates an electromagnetic loader/shaker capable of applying both static and dynamic loads to the rotating shaft.  Testing was completed with the rotor fully supported by magnetic bearings, compliant foil bearings, hybrid foil/magnetic and Zero Clearance Auxiliary Barings.  These tests demonstrated numerous advances in oil-free bearing technology.  The first ever achievements include: operation of a rotor with a mass in excess of 50 kg supported solely by foil bearings, operation of hybrid foil/magnetic bearings to high speed, continued operation following simulated magnetic bearing failures for a fully hybrid foil/magnetic bearing support system, and operation of a rotor supported solely by Zero Clearance Auxiliary Bearings.  data from several tests of the bearing systems are presented. 


Other Projects