滚轮罐耳胶轮动态热物性能及瞬态温度场研究

为研究聚氨酯（PU）和尼龙复合材料（PA1010+20%PTFE+5%MoS₂）两种滚轮罐耳胶轮材料的动态热物性能,以及在矿井提升过程中的温度场，利用DSC-TG和LFA对其进行了热分析实验。结果表明：随着温度升高，聚氨酯和尼龙复合材料的比热容快速增大，热扩散系数呈指数规律下降，导热系数变化较为平稳；尼龙复合材料的热扩散系数和导热系数明显低于聚氨酯。结合胶轮使用工况，基于热传导理论，得到了胶轮温度场理论模型。根据理论模型对胶轮温度场进行数值仿真计算，结果表明：胶轮进行周期性吸热和放热循环，在交替循环中温度不断升高；胶轮截面温升主要分布在接触表层，接触表层温度变化剧烈且分布不均匀；尼龙复合材料温升较聚氨酯低，随着速度的增加，两者的温差迅速增大。即尼龙复合材料具有更好的耐热性能，能有效降低胶轮的摩擦温升。

Dynamic thermophysical properties and transient temperature field of rubber wheel of roller guide shoe

In order to research the thermophysical properties and temperature field of Polyurethane(PU) and polyamide 1010 composite(PA1010+20%PTFE+5%MoS2) which were employed as the rubber wheels of roller guide shoe in coal mine,thermo-analysis experiments were conducted on DSC-TG and LFA.The experiment results show that with the temperature increasing,the specific heat capacity increases rapidly,while the thermal diffusivity decreases exponentially,and the thermal conductivity almost keeps stable for both PU and PA...