非稳态热弹流润滑中黏压系数的影响

Influence of Viscosity-pressure Coefficient on Non-steady-state Thermal Elastohydrodynamic Lubrication

数值模拟了非稳态热弹流润滑,压力和膜厚分析分别采用多重网格法和多重网格积分法,温度计算采用单向逐列扫描。分析了黏压系数的影响。指出了黏压系数大的润滑油,会形成较高的第2压力峰、温度峰以及较大的表面摩擦力,虽可增加油膜厚度,但对接触疲劳寿命有不利影响。

Numerical solutions to non-steady-state thermal elastohydrodynamic lubrication are stimulated. the pressure field was solved with a muhi - level technique, the surface deformation was solved with a multilevel multi-integration method, and the temperature filed was solved with a finite different scheme through a sweeping progress. The influence of viscosity-pressure coefficient is analyzed. By analyzing the corresponding result, it is found that the lubricating oil of large viscosity-pressure coefficient can form extremely the higher second pressure spike, temperature spike and biggish surface friction and may lead to negative influence on their contact fatigue life, though an increased oil film thickness is recorded therewith.