输送带非等温硫化过程数值模拟与实验研究  

Numerical simulation and experiment of non-isothermal vulcanization process of conveyor belt

作　　者：樊文瑞 李军霞 张弘玉 贺志军 FAN Wen-rui;LI Jun-xia;ZHANG Hong-yu;HE Zhi-jun(College of Mechanical and Vehicle Engineering,Taiyuan University of Technology,Taiyuan 030024,China;National-local Joint Laboratory of Mining Fluid Control Engineering,Taiyuan 030024,China;Shanxi Research Center of Mining Fluid Control Technology Engineering,Taiyuan 030024,China)

机构地区：[1]太原理工大学机械与运载工程学院,山西太原030024 [2]矿山流体控制国家地方联合工程实验室,山西太原030024 [3]山西省矿山流体控制工程技术研究中心,山西太原030024

出　　处：《煤炭工程》2023年第1期112-117,共6页Coal Engineering

基　　金：山西省2019年度重点研发计划项目“基于电磁感应加热的输送带接头硫化特性”(201903D121062)。

摘　　要：为了探究输送带在硫化过程中内部不同区域的温度和硫化程度(橡胶交联程度)随时间的变化规律,通过实验得到了橡胶导热系数和比热容在不同温度下的数值,并编写成UDF程序导入FLUENT。通过三种温度145℃、150℃、155℃下橡胶硫化曲线对常用的硫化动力学模型进行拟合分析,确定最佳硫化动力学模型。以C语言和FLUENT预定义宏为基础,编制了UDF用户自定义程序模型,通过有限元分析软件FLUENT实现了输送带硫化过程中传热与硫化度的耦合,最后通过测温实验验证了模拟的精确性。结果表明:选取的硫化动力学模型,初始条件和边界条件的设置,硫化与传热耦合计算方法可以准确预测输送带的硫化过程。输送带外部与内部区域升温速率差异显著,其中心区域是升温速率最慢、焦烧时间最长、最后完成硫化的区域。根据模拟结果可对输送带硫化时间、胶料配方、橡胶预热等方面进行硫化工艺优化。In order to explore the variation of temperature and vulcanization degree with time(rubber crosslinking degree) in different areas of the conveyor belt during vulcanization process, the numerical values of rubber thermal conductivity and specific heat capacity at different temperatures were obtained through experiments, which were written into UDF program and imported into FLUENT. According to vulcanization curves of rubber at 145℃, 150℃ and 155℃, the common vulcanization dynamics models were fitted and analyzed to determine the best vulcanization dynamics model. Based on C language and FLUENT predefined macros, the UDF user-defined program model was compiled. The coupling between heat transfer and vulcanization degree was realized by finite element analysis software FLUENT. Finally, the accuracy of simulation was verified by temperature measurement experiment. The results show that the vulcanization process of conveyor belt can be accurately predicted by the method of coupling calculation of vulcanization and heat transfer based on the selected vulcanization dynamics model, setting of initial conditions and boundary conditions. The heating rate is significantly different between the external and internal areas of the conveyor belt, and the central area is the area with the slowest heating rate, the longest scorching time, and the final completion of vulcanization. According to the simulation results, the vulcanization process of conveyor belt can be optimized in the aspects of vulcanization time, rubber material formula and rubber preheating, etc.

关 键 词：输送带 硫化动力学 耦合模拟 有限元分析 

分 类 号：TD528.1[矿业工程—矿山机电]