Abstract
Stable supply of oil for lubrication and cooling into drive units has become an important issue. We focused on the shafts of transmissions installed in automobiles and applied the technology of current automatic transmissions. In this study, the behavior of oil lubricating a pipe simulating a shaft rotating at high speed in a multiphase state dominated by centrifugal and agitation forces was evaluated through experiments. The pipe geometry was varied, and the oil discharge behavior and discharge flow rate ratio were evaluated. The discharge velocity of lubricant in the pipe and the discharge behavior of oil from the discharge hole with changes in pipe velocity were evaluated in three patterns, and their correlations were evaluated.
