Influence of Cage Clearance on Bearing Lubrication©

Film thickness decay and replenishment in point contact lubricated with different greases: A study into oil bleeding and the evolution of lubricant reservoir

“…She then studied the grease friction coefficient using MTM which could model bearing operation condition and found that semi-starvation could be self-improved when greases were sheared or heated Contents lists available at ScienceDirect journal homepage: www.elsevier.com/locate/triboint replenish the track [10]. Damiens et al [11] optimized the cage clearance of a modeled bearing structure to prevent starvation. Nagata et al [12] found that lateral vibration would promote grease reflowing back to the contact.…”

Track Replenishment by Lateral Vibrations in Grease-Lubricated EHD Contacts

“…They also showed that ball spin and cage effects may affect the lubrication of the bearing by improving the replenishment conditions. Damiens, et al (26) showed that cages have a strong influence on the lubrication of bearings by redistributing the grease around the contact and thus determining lubricant supply. Cann and Lubrecht (27) carried out investigations on the effect of cyclic loading/unloading of the contact on lubricant replenishment.…”

Grease film evolution in rolling elastohydrodynamic lubrication contacts

“…After the churning phase, grease permeates and remains at different locations in the rolling bearings [42]. Various effects, such as rolling element spin [13], stop-restart [36], temperature [42], cage clearance [43], vibration or transient loading [44], and centrifugal force [45], among others, improve grease replenishment directly by dropping grease lumps from bulk [42], grease redistribution [43], or changing the grease flow around the contacts [20]. A temporary addition of grease lumps will reverse the film decay process [42], during which a feed-loss balance may be well maintained under some of the effects outlined above.…”