Elucidation of the oil film pressure generation mechanism by the dimple pattern

Dimple improves supplying the lubricating oil and it reduces friction of the sliding surface. its effect varies depending on the dimple shape and arrangement pattern, therefor generic design method of dimples has not been clarified. The purpose of this study is proposing design method of dimples based on fluid pressure under fluid lubrication. We analyzed maximum load carrying capacity and fluid pressure using the TED/CPA when single and multiple dimples were applied load and sliding velocity in oil lubrication. We changed diameter of dimple, depth, curve, number of dimples and pitch between dimples. In case of single dimple, maximum load carrying capacity increases with increasing the dimple diameter, and maximum load carrying capacity decreases with increasing the depth. There is an appropriate curve degree dependance on the depth of dimple. In case of multiple dimples, the effect of dimple overlapped and fluid pressure mutually increases. Maximum load carrying capacity increases and it per one dimple decreases as the number of dimple increases. Maximum load carrying capacity decreases with extending pitch between dimples. As a result, we proposed the method to investigate the influence of dimple shape on maximum load carrying capacity and fluid pressure.