有限长热弹流温度影响因素的研究

Study on the Temperature of Finite Line Contact EHL

运用多重网格法求解了长径比为2工况下线接触热弹流润滑问题,探讨了速度、黏度、滑滚比对弹流温度的影响。同时对滚子中部的点进行拟合,给出了一定工况下该处弹流温度与其影响因素的关系式。结果表明:速度、黏度、滑滚比是弹流温度的重要影响因素。随着速度的增大,在弹流入口位置油膜温度增大,在出口处则减小;同时温度峰值明显增大,并向入口方向偏移。而黏度和滑滚比在入口区的影响不明显。温度峰值随着黏度的增大而增大,并向入口方向偏移。滑滚比的增大减弱了温度峰值的出现,并趋向于光滑,峰值位置也无明显变化。

The finite line contact elastohydrodynamic lubrication （EHL） numerical solution of profiled roller at the length -diameter ratio of two was gained, and the influences of velocity, viscosity and slide-roll ratio on the temperature distributions of EHL were discussed. The results show that, as the velocity increases, the temperature increases in the inlet region and decreases in the outlet region, and the temperature spike increases observably and moves towards the inlet region. The temperature spike increases with the viscosity increasing, but the temperature in the inlet region almost has no change. The temperature spike increases with the slide-roll ratio increasing, but its spike becomes smooth.