聚氨酯发泡胶热传导性能研究及其在110 kV电缆接头中的应用  

Research on thermal conductivity of polyurethane foam adhesive and its application in 110 kV cable joints

作　　者：梁栋 王琪瑄 白晓烨 田正兵 张李程 吕泽鹏 吴锴[2] 沈频 LIANG Dong;WANG Qixuan;BAI Xiaoye;TIAN Zhengbing;ZHANG Licheng;LÜZepeng;WU Kai;SHEN Pin(Jiangsu Zhongtian Technology Cable Accessories Co.,Ltd.,Nantong 226010,China;School of Electrical Engineering,Xi′an Jiaotong University,Xi′an 710049,China;Ningbo Tonyhoo Electric Technology Co.,Ltd.,Ningbo 315137,China)

机构地区：[1]江苏中天科技电缆附件有限公司,江苏南通226010 [2]西安交通大学电气工程学院,陕西西安710049 [3]宁波东昊电力科技股份有限公司,浙江宁波315137

出　　处：《绝缘材料》2024年第12期116-123,共8页Insulating Materials

摘　　要：聚氨酯发泡胶具有良好的膨胀填充特性、电绝缘性及防水性。为实现将其用于电缆接头保护壳内层的填充,本文首先测试了不同发泡倍率下聚氨酯发泡胶的热、电、力学性能,然后建立了电缆接头的二维轴对称模型,并仿真分析不同填充胶情况下电缆接头的稳态温度场分布,最后搭建了110 kV中间接头的实物模型,对不同填充胶的电缆接头进行了热循环试验。结果表明:聚氨酯发泡胶各项性能测试结果良好,发泡倍率越大,发泡胶的导热性能、绝缘性能和力学性能越差,其中发泡倍率为3倍的发泡胶综合性能最优;不同填充胶接头内部各结构温度的仿真值与实测值的误差绝对值基本不超过10%,验证了仿真模型的有效性;填充发泡胶与填充传统防水胶的接头稳态温度场分布接近。Polyurethane foam adhesive has good expansion filling characteristics,electrical insulation performance,and waterproofness.To achieve its application in filling the inner layer of the cable joint protective shell,at first,we tested the thermal,electrical,and mechanical properties of polyurethane foam adhesive with different foaming ratios.Then,a twodimensional axisymmetric model of the cable joint was established,and the steady-state temperature field distribution of the cable joint under different filling adhesive conditions was simulated and analyzed.Finally,a physical model of the 110 kV intermediate joint was established,and thermal cycling tests were conducted on cable joints using different filling adhesives.The results show that all the performance test results of polyurethane foam adhesive are good.With the increase of foaming ratio,the thermal conductivity,insulation performance,and mechanical property of the foam adhesive decrease,with a foaming ratio of 3 times,the foam adhesive shows optimal comprehensive performance.The absolute error between the simulated and measured temperature values of various structure inside the joint using different filling adhesives are basically no more than 10%,which verifies the effectiveness of the simulation model.The steady-state temperature distribution of the joint filled with foam adhesive is similar to that of the joint filled with traditional waterproof adhesive.

关 键 词：电缆中间接头 聚氨酯发泡胶 温度分布 电-热耦合场 

分 类 号：TM247[一般工业技术—材料科学与工程]