The Effect of Oil Supply on Cage and Roller Motion in a Lubricated Roller Bearing

Abstract

Experimental results indicate that oil supply can have a significant effect on cage and roller motion in a lubricated roller bearing. A theoretical analysis is presented which enables cage and roller motion, for various operating conditions, to be predicted. The theoretical results imply that reducing the oil supply to a minimum value required to maintain full hydrodynamic conditions, reduces cage slip by up to 75 percent of its fully flooded value. This conclusion is consistent with existing experimental evidence.

An Advanced Apparatus for the Study of Roller and Cage Slip in High-Speed Roller Bearings

“…Unfortunately, this analysis indicated that cage and roller slip was independent of the operating conditions and that the latter (roller slip) was also independent of the roller position in the bearing. This is contrary to actual measurements [1,[8][9][10].…”

“…Several analytical models have been developed for the prediction of slip in roller bearings under different conditions [1][2][3][4][5][6]. Although reasonable agreement with experimental observations has been achieved for bearings operating under full elastohydrodynamic conditions, appreciable discrepancies can arise under high-speed and light load conditions.…”

“…This author warned that the analysis was not appropriate to lightly loaded bearings. Boness [1] referred to these operating conditions as corresponding to the "intermediate" lubrication regime, defined by Dowson and Whitaker [11], in which the bearing surfaces are assumed to be rigid and the lubricant piezoviscous. While Poplawski's analytical predictions of slip correlated well with his test results (obtained with a 65 mm bore cylindrical roller bearing operating at a DN value of about one million [3]), they were not in agreement with Harris's predictions.…”

Starvation Effects on the Hydrodynamic Lubrication of Rigid Nonconformal Contacts in Combined Rolling and Normal Motion

“…Restricted lubricant supply to a roller bearing was seen to experimentally and theoretically reduce the amount of cage and roller slip (Boness, 1970). In an experimental Investigation Horsch (1963) showed that the film thickness…”

The Influence of Surface Texturing on the Film Thickness in Starved Lubricated Parallel Sliding Contacts

“…Moreover, for a fully flooded conjunction, the film thickness formula was modified to incorporate the starvation effect into it. Bonessmicro [21] experimentally showed the importance of the starvation effects on the bearing failure and wear. Chevalier et al [22] used a numerical hydrodynamic analysis.…”