【摘要】 复杂工况下，脂润滑角接触球轴承的温升特性对轴承的安全运行具有重要影响。针对脂润滑推力角接触球轴承在复杂工况下的温升特性进行研究，建立了推力角接触球轴承摩擦发热率数学模型；基于传热学理论，分析主轴-轴承-轴承座系统传热方式，建立轴承温升模型，通过试验验证了模型的合理性；基于轴承温升模型，分析了轴承工况参数和结构参数对轴承外圈温升特性的影响规律。结果表明，所建模型可以较好地预测复杂工况下轴承外圈温升，仿真结果与试验结果最大误差为8.3%；轴承在运行开始后20 min内，轴承外圈温升速率较快；载荷、转速的增大以及环境温度的升高均能使轴承外圈温升增大；钢球数增多和沟曲率半径系数增大均能使轴承外圈温升下降。研究结果为脂润滑推力角接触球轴承的优化设计提供了理论依据。更多还原

【Abstract】 The temperature rise characteristics of grease lubricated angular contact ball bearings undercomplex working conditions have an important influence on the safe operation of bearings. The temperature risecharacteristics of the grease lubricated thrust angular contact ball bearings under complex working conditionsare studied;a mathematical model of friction heating rate of thrust angular contact ball bearings is established;based on heat transfer theory,the heat transfer mode of spindle-bearing-bearing block system is analyzed,thetemperature rise model of bearing is established and the rationality of the model is verified by experiments.Based on the temperature rise model of bearings,the influence of bearing operating working parameters andstructural parameters on the temperature rise characteristics of bearing outer ring is analyzed. The results showthat the established model can predict the temperature rise of bearing outer ring under complex working condi-tions well;the maximum error between the simulation results and the test results is 8.3%;the temperature riserate of the outer ring of the bearing is faster within 20 minutes after the start of the bearing operation;the load,speed and ambient temperature increased will increase the temperature rise of the outer ring of the bearing;thenumber of steel balls and groove curvature radius coefficient increased will decrease the temperature rise ofbearing outer ring. The research results provide a theoretical basis for optimal design of thrust angular contactball bearings with grease lubrication.更多还原