矿车盘式制动器温度场的数值模拟

摘要

根据热分析理论，建立矿车盘式制动器摩擦副的有限元模型，模拟矿车制动过程的三维瞬态温度场，研究制动工况、制动时间对摩擦副温度的影响。研究结果表明，摩擦副温度场呈非轴对称分布，且轴向温度梯度较大；制动工况对温升速率和最大值影响显著；制动时间对温升过程有一定的影响。研究结果为制动器摩擦副热应力分析提供支持，进而为矿车盘式制动器工况提供技术数据，为改善制动器工作条件和改进制动器摩擦副的设计提供参考。%According to the heat analysis theory ,the kinetic model of the brake was established and its three-dimensional transient temperature field was simulated .The effect of braking condition and braking time on friction pairs'temperature were investigated . The results show that the temperature distribution in the brake is nonaxi-symmetric and possesses a sharper gradient in axial di-rections.Braking conditon plays an important role on the rising time and the maximum of temperature ,braking time has a certain influence on the rising process of temperature .The research results can offer support for the thermal stress analysis of the brake friction pair and can provide a technical data for the mineral car's actual braking condition .The research results can also improve the working condition of brake and provide a better structural design for the friction pairs of brake .