轴颈偏斜对径向滑动轴承静态性能的影响

Effect of Journal Deflection on the Static Performance of Radial Sliding Bearings

研究了轴颈偏斜对径向滑动轴承静态性能的影响。推导了轴颈偏斜时油膜厚度表达式,计算中考虑温度变化,联解雷诺方程、能量方程与温粘方程,计算了不同偏斜角、不同偏斜方位时轴承的压力和温度分布,以及不同偏心率、不同偏斜角度时轴承的静态特性。结果表明:轴颈偏斜时,油膜厚度、油膜压力与油膜温度分布变化明显,最小油膜厚度出现在端部,最大油膜压力与最高温度均向轴承端部移动;对轴承静态性能的影响也较明显,油膜反力随偏斜角增大而增大,阻力系数随偏斜角增大而减小,对端泄油量的影响在不同偏心率时规律不同。

The effect of journal deflection on the static performance of radial sliding bearings was studied,and an oil film thickness expression derived in the case of journal deflection.During the calculation the temperature variation has been taken into account.Reynolds Equation,energy equation and temperature-viscosity equation have been simultaneously solved.The authors have calculated the pressure and temperature distribution on the bearing at different deflection angles and oblique orientations as well as the static performance of the bearing at different eccentricities and deflection angles.It has been shown that when the journal is being deflected,the distribution of oil film thickness,pressure and temperature changes significantly and the minimum oil film thickness appears at the ends.In the meantime,the maximum oil film pressure and temperature all tend to move to the bearing ends and exercise a relatively conspicuous influence on the static performance of the bearing.With an increase of the deflection angle the oil film reaction force will increase,but the drag coefficient,decrease.The law governing the influence of oil leakage at bearing ends reveals itself as different at different bearing eccentricities.