电磁感应加热轮胎鼓瓦的温度场模拟

Temperature field simulation of a tire drum shell heated by electromagnetic induction

向电磁线圈通入交流电可对用于轮胎硫化的金属内模具实现感应生热,该方法升温快、功率损耗率低、可独立调控。为进一步提升电磁硫化轮胎鼓瓦的温度均匀性,提高胎坯硫化质量,借助COMSOL Multiphysics软件对电磁线圈加热鼓瓦的温度场进行数值模拟,分析通入的电流方向、交流电大小、交流电频率和线圈匝数等多个参数对加热工件的温度和功率的影响。采用正交试验法探寻多个参数的最佳水平组合,由极差分析和方差分析得出一致结论:影响鼓瓦温度均匀性的因素次序为交流电大小>线圈匝数>交流电频率。在此基础上,分别从加热方式和线圈分布结构两方面对线圈鼓瓦模型进行优化,以进一步降低温差,提升硫化均匀性。研究工作可为轮胎硫化中电磁加热金属内模技术提供有意义的参考。

Electromagnetic heating by solenoids can be used in the internal metal mold for tire vulcanization since it affords fast heating, low power loss, and independent control. To further improve the temperature uniformity of the drum shell and the quality of the sulfurized tire when using electromagnetic heating, the temperature field of solenoid-heated drum shells has been simulated by COMSOL Multiphysics to analyze the influence of several parameters (including current direction, AC value, AC frequency and the number of coil turns) on the temperature and power of the heated workpiece. The orthogonal test method is used to find the optimal combination of levels of these parameters. It is concluded by range analysis and ANOVA that the effect of these parameters on the temperature uniformity of the drum shells decreases in the order AC value> number of coil turns> AC frequency. In order to further reduce the temperature difference and improve the vulcanization uniformity, the coil and drum shell model is optimized from the aspects of the heating mode and the coil distribution. This study provides a meaningful reference for the use of electromagnetic heating in tire vulcanization.