角接触球轴承的动态性能对轴承-转子系统的性能至为关键。考虑轴承各元件的相互作用建立了角接触球轴承-转子系统的动力学分析模型，模型中钢球与滚道间的摩擦力采用弹流润滑理论计算，钢球与保持架间的作用等效为高刚度弹簧，引导套圈与保持架间摩擦力采用短轴轴承理论计算，基于四阶Runge-Kutta实现了动力学模型的快速求解。研究了润滑油的密度和粘度、引导方式和轴向预紧力对轴承启动加速和停止减速过程以及打滑的影响。结果表明：高密度和大粘度润滑油将使启动加速变慢而使停止减速变快；内圈引导时轴承的启动加速最慢；轴向预载不足将导致轴承在启动及稳定运转阶段产生严重打滑。
Angular contact ball bearing significantly affects the performance of bearing-rotor system. A dynamic model for bearing-rotor system is established with comprehensive consideration of interactions between bearing elements. The traction force between ball and raceways is evaluated based on elastohydrodynamic lubrication theory; the interaction between ball and cage is modeled as the compression of spring with high rigidness, while Petroff's bearing model is utilized to calculate the friction force between guiding ring and cage. The dynamic model is efficiently solved based on the fourth order Runge-Kutta algorithm. The effects of lubricant density and viscosity, guide mode of cage and axial preload on the process of startup and stop are investigated based on the developed dynamic model. The results show that, the lubricant with high density and viscosity will delay the startup process but accelerate the shutdown process; inner ring guide mode will make the startup process of bearing slow; when the axial preload is not large enough, there is sever skidding between ball and raceways during startup and steady state running process.
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