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轴承磨损寿命与系统动力学特性密切相关,为了准确预测行星齿轮传动系统的轴承磨损寿命,提出了基于动力学模型的行星齿轮传动系统的轴承磨损寿命预测。首先运用集中参数理论,建立了一个考虑轴承磨损的行星齿轮传动系统平移-扭转动力学模型;然后运用摩擦学理论,建立滚动轴承单周接触的磨损量计算模型,结合行星齿轮传动系统动力学模型,建立轴承磨损寿命预测模型;最后分析了轴承磨损对轴承动态载荷和轴承磨损寿命的影响规律,并提出了提高轴承磨损寿命的方法。分析表明,轴承磨损对行星轮轴承动态载荷影响最大,并且行星轮轴承的磨损寿命与其刚度成正比,因此可通过轴承径向间隙补偿或轴向预紧等方法来提高行星轮轴承磨损寿命。
Bearing wear life and system dynamics are closely related. In order to accurately predict bearing wear life of planetary gear drive system, bearing wear life prediction of planetary gear drive system based on dynamic model is proposed. Firstly, using the theory of concentration parameters, a translational-torsional dynamic model of the planetary gear transmission system considering bearing wear is established. Then, the wear volume calculation model of single-cycle contact of the rolling bearing is established by using tribology theory. Combined with the dynamic model of planetary gear transmission system, The prediction model of bearing wear life is established. Finally, the influence of bearing wear on bearing dynamic load and bearing wear life is analyzed, and a method to improve bearing wear life is proposed. The analysis shows that the bearing wear has the greatest influence on the dynamic load of planetary bearings, and the wear life of planetary bearing is proportional to its stiffness. Therefore, the wear life of planetary bearings can be improved by bearing radial clearance compensation or axial preloading.