基于内圈滚道廓形的圆柱滚子轴承旋转精度

Rotational accuracy of the cylindrical roller bearing based on inner raceway profile

在轴承几何关系和运动关系分析基础上,建立了考虑内圈滚道廓形的圆柱滚子轴承径向跳动数学模型,分析了内圈滚道圆度误差幅值、谐波阶次、滚子个数以及径向游隙对轴承旋转精度的影响规律,并验证了模型的正确性.结果表明:内圈滚道的圆度误差对轴承旋转精度的影响较大,内圈滚道圆度误差幅值对轴承旋转精度影响较大,内圈滚道低阶谐波对轴承旋转精度的影响较高阶谐波显著;当内圈滚道谐波阶次为滚子个数的整数倍时,轴承旋转精度显著下降;减小内圈滚道圆度误差幅值能有效提高圆柱滚子轴承的旋转精度.

Based on analysis of the geometric relation and motion relation of bearing,a mathematical model for radial runout of cylindrical roller bearing in consideration of inner raceway profile was developed to investigate the influence of inner raceway roundness error（i.e.,amplitude,order）,the roller number and radial clearance on rotational accuracy.The model was validated to be reasonable by specific spot way.The results indicate that inner raceway roundness error has a significant influence on rotational accuracy of cylindrical roller bearings.The rotational accuracy of cylindrical roller bearings drops sharply with increasing the amplitude of inner raceway roundness error.The effect of low-order harmonic on the rotational accuracy is greater that high-order harmonic.When harmonic order is an integralmultiple of the roller number,the rotation accuracy of cylindrical roller bearings significantly reduces.The rotational accuracy of cylindrical roller bearings could be improved by reducing the amplitude of inner raceway roundness error.