Enhanced lubricant replenishment by angled surface velocities in EHL contacts

摘要

Effective lubricant replenishment to the lubrication track is highly expected for the purpose of lubricating film formation. In this paper, a novel lubricant replenishment mechanism is investigated. It is found that when velocities of the two bounding surfaces are angled, the lubricant adjacent to the track is efficiently moved back, and the inlet oil reservoir is enhanced considerably. The patterns of the inlet reservoir vary with disc revolutions, entrainment velocities, included angles of the surface velocities as well as lubricant feeding amount. The inlet lubricant supply and film formations by the grease are compared to those by its base oil, and the differences are analyzed from a perspective of lubricant transportations.