2947 Oil Solidified High-Pressure Traction Experiments with Spin and Approximation by Creep Theory
Details
Under high contact pressure of traction-type CVT of automobiles, traction oil seems to behave like solid lubricants and elastic contact mechanics (creep theory) seems to be appropriate for evaluation of traction curves similar to that of railway wheels. In the present study, a traction testing machine up to 3GPa was established, in which a sphere and a v-notch-shape roller contacted at two points to generate spin component. Obtained high-pressure traction curves with small spin were lower than the roughly calculated ones based on the creep theory. However, the curves with large spin were almost consistent with them. The modified calculation curves with small spin considering small skew angle 0.2° from pure roll traction experiments, were almost consistent with the above experimental curves. It seems to be impossible to avoid the small skew caused by fitting space of the bearing and eccentric rotation of the coupling even in any traction testers.
