Carbon-Phenolic Cages for High-Speed Bearings. Part III - Development of Numerical Models for Heat Generation and Temperature Prediction in Lightly Lubricated Bearings
Interim rept. 1 Jan 2001-1 Aug 2002
AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH PROPULSION DIRECTORATE
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This is the third part of a three-part series of reports by AFRLPRTM to investigate carbon-phenolic bearing cages in high- speed lightly lubricated bearings. This portion describes the bearing and thermal analysis models. A process has been developed to numerically investigate operating temperatures of a rolling element bearing which combines capabilities of the Advanced Dynamics of Rolling Elements ADORE software with finite element thermal analysis. Initial results are presented that describe experimental and predicted transient and steady-state temperature responses for a 30 mm ball bearing duplex pair operating with only a light coating of Pennzanetrade name lubricant for two different rolling element materials Sisub3N4sub, 52100 steel in a bearing with 52100 steel races operating at a speed of 10,000 rpm using a conventional cotton-phenolic cage. Although preliminary result agreement appeared excellent, further analysis led to model modifications to account for the potential of thermal expansion to cause an increase or decrease in bearing load. This change in load can be significant for the relatively light load on a satellite bearing. The effect of modifying the shape of the traction curves used in the bearing analysis model has also been investigated.
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