论文部分内容阅读
基于统一Reynolds方程系统模型开展了富油点接触工况下微织构表面润滑摩擦性能的数值模拟研究.在通过实验标定数值模拟中润滑剂流变参数的基础上,系统分析了微织构表面摩擦系数周期变化的全过程,初步揭示了微织构的减摩机理.结果表明:数值模拟结果与实验结果有较好的吻合;瞬时摩擦系数达到最小值时,微坑单元一般处于名义Hertz接触区域的前边界;当微坑运动到Hertz接触区域内时,微坑前沿局部膜厚减小,而微坑后边沿膜厚局部增大,形成局部膜厚增大区;局部膜厚增大区的大小对微织构的润滑摩擦性能有较大影响,其面积越大,减摩效果越好.
Based on the unified Reynolds equation system model, the numerical simulation of the lubrication and tribological properties of micro-textured surfaces under oil-rich contact conditions was carried out. Based on the experimental calibration of the rheological parameters of the lubricant in the numerical simulation, The results show that the numerical simulation results are in good agreement with the experimental results. When the instantaneous friction coefficient reaches the minimum value, the micropitting units are generally in the nominal Hertz contact When the pit moves into the Hertz contact area, the local film thickness at the front of the micro-pit decreases, while the film thickness at the rear edge of the micro-pit increases locally to form the local film thickness increasing area. The local film thickness increasing area The size of the micro-texture of the lubricating friction has a greater impact, the larger the area, the better the anti-friction effect.