轴承滚子非常态运动弹流润滑分析

Elastohydrodynamic Lubrication Analysis of Roller Bearing Non-Normal Operation

针对工程中轴承工作时滚子发生非常态运动问题,建立滚子非常态运行模型,利用数值分析方法,研究了滚子非常态运行时滚子与外圈、滚子与内圈间的弹流润滑特性。结果表明,轴承滚子微小偏斜时,会造成滚子与外内圈之间一端油膜膜厚减小,接触压力增大,另一端变化正相反,其中接触压力的改变较明显,引起偏载现象,且滚子与内圈间的情况更严重;轴承滚子小角度歪斜时,对滚子与内外圈间膜厚和应力分布情况影响都不大。

For roller non-normal motion problems of engineering bearing, roller non-normal operation model is established. Using the method of numerical analysis, Elastohydrodynamic lubrication characteristics of roller outer ring and roller and inner ring under roller non-normal operation is studied. Results show that, film thickness decreases and pressure increases in one side of roller when small deflection of bearing roller, however, the other side of roller is the opposite. Moreover the change of the contact pressure is more noticeable which causing unbalance loading phenomenon. It is more serious between roller and in-ner ring. When roller is small deflected angle, the distribution of film thickness and stress in roller and inner is small impact-ed.