Predicted and Experimental Performance of Large-Bore High-Speed Ball and Roller Bearings,
NATIONAL AERONAUTICS AND SPACE ADMINISTRATION CLEVELAND OH LEWIS RESEARCH CENTER
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Computer programs Shaberth for ball bearings, Cybean for roller bearings were used to predict bearing inner- and outer-race temperatures, cage speed, and friction power loss or heat transferred to the lubricant over a range of operating conditions. The results were compared with experimental data obtained previously. The 120-mm-bore ball bearings were operated at thrust loads of 6672, 13 350, and 22 240 N 1500, 3000, and 5000 lb and at shaft speeds of 12 000, 16 7000, and 20 800 rpm with jet-lubrication flow rates of 0.0038 and 0.0083 m3min 1.0 and 2.2 galmin. The oil inlet temperature was maintained constant at 394 K 250 deg F.