With the rise of electric vehicles, bearings are operating under increasingly high speeds. Combined with low load conditions, this can lead to a dynamic phenomenon known as bearing skidding. In certain circumstances, bearing skidding can generate excessive frictional heat and high surface shear stress, and subsequently result in efficiency issues or premature bearing failure.
Romax’s Bearing Dynamics application uses a novel approach based on transient time-domain analysis to predict the occurrence of skidding in electric-vehicle bearings in a matter of minutes. The model considers structural, thermal and fluid domains, including the influence of centrifugal and gyroscopic effects on rolling- element dynamics, heat generated by the lubricant and associated temperature rise, and rheology and traction behaviour of the lubricating oil.
This application helps design engineers and bearing analysts to avoid damaging failures by designing more reliable bearings and selecting better lubricants, through unique insight of the underlying skidding mechanism and bearing dynamics.