給油条件の変更によるEHL接触部周囲メニスカスの変化の観察

抄録

Meniscus and cavitation are formed around the EHL contact area of rolling elements in many machinery. Their shape affects to the lubrication state of the EHL contact area. Especially if the rear part of the meniscus breaks, the amount of lubricating oil supplied to the next EHL contact area decreases, and it is caused oil starvation. The shape of the meniscus changes depending on the oil supply conditions. However, there are no cases in previous studies that focus on the relationship between the oil supply conditions and the shape of meniscus. Therefore, in this study, we observed change in the meniscus and the cavitation due to changes in oil supply conditions under higher peripheral velocity condition than previous studies. We also calculated the pressure distribution inside the meniscus by pressure estimation utilize PIV analysis result. As a result, it was confirmed that the cavitation does not change above a certain peripheral speed. It was also confirmed that the decrease in pressure inside the meniscus was suppressed as the amount of oil supply increased.