表面波度对线接触往复运动下热弹流润滑特性的影响

应用数值分析方法求解了表面波度对线接触往复运动工况下的热弹性流体动力润滑的影响．分析中假设所研究的润滑油服从Ree-Eyring流变模型，使用3种冲程长度，并使这3种冲程下冲程中心的卷吸速度值完全相等．表面波度扰乱了压力、膜厚和油膜中层温升的分布．由于表面波度的影响，一个周期的两个冲程内的油膜的变化不再一致．同光滑表面接触相比，表面波度在一个周期内提升了油膜中的最大压力和最大温升．降低了最小膜厚和摩擦因数．表面波度对油膜中最大压力的变化影响最大．

Effect of Surface Waviness on the Thermal Elastohydrodynamic Lubrication in Line Contact Under Reciprocating Motion

Using numerical techniques, the effect of surface waviness on the thermal elastohydrodynamic lubrication （EHL） in line contact under reciprocating motion is investigated. The oil used is assumed to be Ree-Eyring fluid. Three types of stroke length are employed and the entrainments are kept constant at stroke centers. It shows that the pressure, film thrckness and middle layer temperature rise of the oil film are perturbed by surface waviness. The evolvements of the oil film in the two strokes of one working cycle are not coincided with each other. The surface waviness enhances the maximum pressure during one working cycle. It also increases the maximum temperature rise and reduces the minimum film thickness as well as the traction coefficient. Therefore, the surface waviness greatly affects the changes of the maximum pressure of the oil film.