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Grease lubrication in rolling element bearings
 Kroupa, Jiří ; Čermák, Jan (referee) ; Frýza, Josef (advisor)
This diploma thesis deals with an analysis of lubrication film in contacts of simulated thrust ball bearing lubricated by greases and comparison of the film thickness between this apparatus and ball-on-disc. According to the literature, ball-on-disc is the most used apparatus for studies of EHL. But these devices neglect some important factors acting in real bearing such as presence of cage, number of rolling elements, their spin or a type of contact geometry. Therefore it is necessary to investigate comparability of these approaches. For this purpose, measurements on unique apparatus of simulated thrust ball bearing are performed. The effect of each factor is evaluated employing Factorial design method. Significant differences are discovered between results, primarily in tendency of contacts to starvation. According to these results, it is necessary to focus the research in the field of bearing lubrication on conditions closer to real bearings.
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