【摘要】 本文基于修正的赫芝压力分布,取得了重载点接触热弹流(TEHL)问题的数值解,得到了温度分布、油膜厚度和摩擦拖曳力.润滑剂的粘度与压力、温度之间的关系由茹兰兹公式确定,摩擦拖曳力的计算,分别采用了热牛顿模型和恩瑞模型.本文的结果同Bruggemann等人的计算和实验结果进行了比较,取得了较好的一致性.计算结果表明:滑动速度、载荷对接触区内的油膜温升影响很大;在滑动速度较大时,热解的油膜厚度大大低于等温油膜厚度;采用恩瑞(Eyring)模型计算摩擦拖曳力较为理想.更多还原

【Abstract】 In this paper, a numerical solution for the thermal elastohydrodynamic problem at a heavily loaded contact is developed based on corected Hertzian pressure distribution. The temperature distribution, oil film thickness and traction coefficients in the contact zone are obtained. The dependency of lubricant viscosity on pressure and temperature is determined by the Roalands’ formula. Both the thermal Newtonian rheological model and Eyring’s rheological model are used in the calculation of the traction. Calculation results have been compared with the theortical and experimental results by H. Bruggemann and they are in good agreement with them. Results show that gliding speed and load have a significant effect on the tempture rise in the oil film and that inlet heating has aarked influence on the oil film thickness. Moreover, the Eyring’s model is more satisfactory to the calculation of the traction.更多还原