【摘要】 为探索轴颈圆度、圆柱度误差对轴承润滑性能的影响机制,建立轴颈存在圆度、圆柱度误差的径向轴承模型,推导对应误差下的轴承液膜间隙函数,并分别研究轴颈圆度、圆柱度误差对润滑性能以及承载能力的影响机制。研究表明:轴颈圆度、圆柱度误差会导致轴承液膜润滑特性下降,并引起轴承的承载力和摩擦力出现周期性的波动,进而影响轴承的回转精度和轴系运行平稳性;重载情况下轴颈圆度、圆柱度误差对轴承润滑性能的影响更加显著,甚至会导致液膜破裂,轴承失效。更多还原

【Abstract】 To explore the influence of roundness and cylindricity errors of journal on the lubrication performance of bearing,the model of the radial sliding bearing with roundness and cylindricity errors was established. The expression of liquid film thickness equation considering the integrated error of the bearing was deduced. The influence of roundness and the cylindricity errors on the lubrication performance and load-carrying capacity of the bearing were studied respectively.The results show that roundness and cylindricity errors can lead to degradation of liquid film lubrication performance of bearing,result in periodical fluctuation of load-carrying capacity and friction,and furthermore affect the rotation precision of bearing and axial stability. Under heavy loading conditions,the roundness and cylindricity errors have a more significant influence on the lubrication performance of bearing,which can even lead to the rupture of the liquid film and the failure of the bearing.更多还原