The static characteristics of a three-lobe bearing with a preload factor of 0.75 were studied. Operating eccentricity within the clearance space, circumferential film thickness profiles, and temperatures were measured. In addition, circumferential pressure profiles were measured at three axial locations. Three operating speeds were tested and, for each speed, the load was varied so that the Sommerfeld number ranged from 0.23 to 2.87. Data indicated that the maximum pressure occurred circumferentially near the point of minimum oil film. Eccentricity measurements were presented and verified through independent film thickness measurements. Detailed data was provided to facilitate analytical comparisons.
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Taylor et al. (1995) studied this question.
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