The thermal aging life assessment of cable insulating materials used in rail transit vehicles
WANG Chunfeng1, ZHOU Jialong2, WANG Hongfeng1, LIANG Bin2, HAN Zhidong1,3
1. School of Materials Science and Engineering, Harbin University of Science and Technology, Harbin 150040; 2. Zhongtian Technology Industrial Wire & Cable System Co., Ltd, Nantong, Jiangsu 226010; 3. Key Laboratory of Engineering Dielectrics and Its Application Ministry of Education, Harbin University of Science and Technology, Harbin 150080
Abstract：This paper studies the thermal aging behavior of low smoking halogen-free flame retardant polyolefin (HFFRPO) materials used in rail transit vehicles and estimates the reliability of the insulation during the long service. Conventional thermal aging life assessment method is adopted to get the basic thermal aging data of HFFRPO. The thermal aging data is further processed on the basis of Boltzmann model and then the time parameter when the mechanical property parameters decrease to 50% is deduced, based on which the thermal aging life curve is fitted. In addition, the thermal aging life is also calculated according to the activation energy obtained by differential scanning calorimetry (DSC). The results show that the thermal aging life derived from the tensile strength is less than that derived from the elongation at break; the initial oxidation activation energy varies with the thermal aging degree, and the activation energy obtained by DSC method is not suitable to deduce the thermal aging life of HFFRPO materials but as an important reference index of the aging state of materials.
王春锋, 周佳龙, 王宏峰, 梁斌, 韩志东. 轨道交通车辆用电缆绝缘材料热老化寿命评估方法[J]. 电气技术, 2021, 22(12): 14-21.
WANG Chunfeng, ZHOU Jialong, WANG Hongfeng, LIANG Bin, HAN Zhidong. The thermal aging life assessment of cable insulating materials used in rail transit vehicles. Electrical Engineering, 2021, 22(12): 14-21.
2021, Vol. 22 
