面对面角接触球轴承装置热力耦合仿真分析

Thermal-Force Coupling Simulation of Face-to-Face Angular Contact Ball Bearing Device

在研究轴承时为了方便计算简化模型,一般将组合装置中的两个轴承简化成一个轴承进行分析,这样会带来一定的误差,因此这里分析了面对面球轴承组合装置中两个轴承的热特性耦合。这里首先分析了角接触球轴承的摩擦力矩,根据混合润滑机理,考虑了混合热阻影响,计算了轴承在发生摩擦时生成的热量,通过ANSYS的APDL命令流将进行参数化建模,建立了面对面轴承组合装置仿真模型,再利用APDL命令流循环计算出组合装置不同时刻下的温度场和在不同时刻温度场下的热膨胀诱导的力,从而分析出组合装置中的两个轴承预紧力和发热量的时变耦合特性。实验结果表明,这里模型与实验数据吻合,验证了本模型的正确性。

In order to simplify the model and facilitate calculation when studying bearings,two bearings in the combined device are generally simplified into one for analysis,which will bring some errors.Therefore,it analyzes the coupling thermal character⁃istics of two bearings in the combined device of face to face ball bearings.Firstly,it analyzes the friction moment of angular con⁃tact ball bearing.According to the mixed lubrication mechanism and considering the influence of mixed thermal resistance,the heat generated by the bearing when friction occurs is calculated.Parametric modeling is carried out through the APDL command flow of ANSYS,and a simulation model of the face to face bearing assembly device is established.Then the APDL command flow cycle is used to calculate the temperature field at different times and the thermal expansion induced force at different times of the combined device,and the time-varying coupling characteristics of the preloading force and heat output of the two bearings in the combined device are analyzed.The experimental results show that the proposed model is consistent with the experimental data,which verifies the correctness of the proposed model.