Abstract
Traction drives is devices that transmits power by the shear stress of the lubricating oil supplied between the rolling elements. Since the designing traction drives based on the traction coefficient, it is necessary to know the traction coefficient accurately. However, the necessary roller surface temperature is usually used experimental values in this process. Therefore, roller surface temperature was estimated by using thermo-fluid dynamic analysis in this study. In previous studies, a model was created with a thicker oil film than the actual the oil film thickness of the contact point. On the other hand, a model with an oil film thickness closer to the actual thickness of the contact point was created for the purpose of more accurate estimation of the roller surface temperature in this study. Furthermore, the roller surface temperature was compared between analysis result and experimental result. As a result, it was found that the analytical values tended to be higher than the experimental values under high peripheral speed conditions. It was considered as cause that there is no heat transfer from the roller to the shaft in this model.
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