Technical Paper
Bearing Loads of Elastically Supported Flywheels in Vehicular Applications
2018-04-03
2018-01-0826
In this work, the bearing loads of a flywheel-based kinetic energy recovery system caused by gyroscopic torques and dynamic forces during vehicle maneuvering are investigated. This paper is a follow-up study to a preliminary investigation where the flywheel was assumed to be rigidly supported, thus neglecting the effect of rotor precession. At finite stiffnesses of real bearings, however, the flywheel is enabled to move, due to the compliance of the bearing itself, relative to the vehicle chassis with high angular velocities. Based on the equations for elastic rotor-platform interactions, which relate the vehicle’s roll, pitch and yaw rate with the internal transverse torques acting on the elastically supported flywheel, the radial bearing loads are re-investigated in this work for some selected standardized driving maneuvers.