Retention against rotational and axial movement of a two row ball bearing cartridge in the housing of a turbomachine with squeeze film damping

摘要

An assembly for a turbocharger comprising: a housing (440) comprising a substantially cylindrical bore having a longitudinal axis, an inner diameter, a proximate end and a distal end and a counterbore (442) positioned at the distal end, substantially centered on the longitudinal axis and having an inner diameter; a bearing cartridge (300) substantially centered on the longitudinal axis between the proximate end and the distal end and comprising an outer race, the outer race having an outer diameter; and a limiting mechanism (450,452) positioned at the proximate end, wherein the inner diameter of the cylindrical bore exceeds the outer diameter of the outer race and the inner diameter of the counterbore (442), wherein the outer diameter of the outer race exceeds the inner diameter of the counterbore (442) and wherein the counterbore (442) and the limiting mechanism (450,452) limit axial movement of the outer race of the bearing cartridge (300).