非牛顿特性对重载点接触热弹流润滑的影响

采用近似完全数值解法对HKD-1型航空润滑油进行了重载点接触热弹流分析,将两种不同流变模型下的计算结果进行比较,并进行了试验验证.结果表明:重载情况下,润滑油的非牛顿特性较显著,非牛顿特性对于弹流润滑中润滑油的温度、剪应力和拖动力影响较大,对压力分布影响较小.采用牛顿模型计算误差非常大,采用Evans-Johnson模型计算精度较高.滑滚比增加,油膜温升增加显著,压力变化不大,只是二次压力峰的峰值有所减小.

Effects of non-Newtonian behavior of lubricants on the thermal elastohydrodynamic lubrication in heavily loaded point contacts

This paper used an approximate numerical solution to simulate the thermal elastohydrodynamic lubrication(EHL) for an aviation lubricating oil HKD-1 in a point contact under heavier load.The computed results for two different rheological models were compared and examined by the traction test.The results show that the non-Newtonian characteristic of the lubricant is more important for heavier load(p0>1 GPa) and has a significant effect on the temperature,shear stress and traction of the lubricant in EHL,but i...