Oil distribution inside the under-race lubricated bearing is crucial for lubrication and cooling of high-speed ball bearings. An under-race lubricated ball bearing is modeled to numerically investigate the effects of operating parameters and feed hole configuration on the distribution behavior of lubricant oil. The results of the numerical simulation indicate that the average oil volume fraction changes with a convex trend as the outer race rotating speed increases, while it changes monotonically with the inner race rotating speed, oil volume flow rate, and oil temperature. The extent of oil spreading on the outer race, cage, ball, and inner race decreases successively. Optimizing the feed hole configuration according to the average oil volume fraction is helpful to achieve precise lubrication of the under-race lubricated ball bearing.

底盘润滑轴承内的油分布对于高速球轴承的润滑和冷却至关重要。对底盘润滑球轴承进行建模，以数值方式研究操作参数和进油孔配置对润滑油分配行为的影响。数值模拟结果表明，平均油量分数随着外圈转速的增加而呈凸趋势变化，而随着内圈转速，油量流量和油温的变化而单调变化。油在外圈，保持架，球和内圈上的散布程度依次减小。根据平均机油体积分数优化进油孔配置有助于实现底盘润滑球轴承的精确润滑。