固体颗粒对摆动直齿轮弹流润滑的影响研究

Research of the Influence of Solid Particle on Elastohydrodynamic Lubrication of Spur Gear under Oscillation Condition

建立了考虑固体颗粒的摆动直齿轮的弹流模型,考虑了时变效应,研究了以正弦规律摆动的工况下固体颗粒对摆动直齿轮的弹流润滑影响,分析了单个固体颗粒、固体颗粒分布密度和颗粒速度对压力和膜厚的影响。结果表明,摆动工况下的压力和膜厚类似双驼峰形状分布,考虑固体颗粒后的中心压力和最大压力变化较小,中心膜厚和最小膜厚则明显减小;颗粒分布密度越大,中心压力和最大压力均明显增大,中心膜厚和最小膜厚则明显减小;颗粒速度对最小膜厚影响较大,颗粒速度越大,最小膜厚显著减小。

Considering solid particle,the elastohydrodynamic lubrication model of spur gear under oscillation condition is set up. The influences of solid particle on elastohydrodynamic lubrication of spur gear under sine law oscillation condition are studied,taking time- variant effect into account. The influence of a single solid particle,solid particles distribution density and solid particles speeds on oil film pressure and film thickness are analyzed. The results show that,the oil film pressure and film thickness under oscillation condition are in the cases of a similar double hump shape distribution. Considering solid particles centre film pressure and the maximum film pressure vary little,but centre film thickness and the minimum film thickness decrease remarkably. The greater solid particle distribution density is,the larger centre film pressure and the maximum film pressure are. The greater solid particles distribution density is,the thinner centre film thickness and the minimum film thickness are. The solid particles make evident differences to the minimum film thickness,if speed of solid particles is high,the minimum film thickness diminishes dramatically.