Bearing assembly for a turbocharger having a helical groove on the inner surface of the turbocharger journal bearing

摘要

An exemplary bearing assembly includes a turbine side journal bearing (440) with helical grooves (422) along an inner journal surface where each helical groove includes a lubricant opening (430) and opposing arms where each arm terminates at a respective axial surface of the journal bearing; a compressor side journal bearing (440') with helical grooves (422') along an inner journal surface where each helical groove includes a lubricant opening (430') and opposing arms where each arm terminates at a respective axial surface of the journal bearing; and a spacer (236) to space the turbine side journal bearing and the compressor side journal bearing along an axis. Various other exemplary devices, systems, methods, etc., are also disclosed.