高导热环氧胶粘剂在变电设备应用中抗老化运维探究  

Research on anti-aging operation and maintenance of high thermal conductivity epoxy adhesive in substation equipment application

作　　者：王巍 李智威 张赵阳 许汉平 孙利平 WANG Wei;LI Zhiwei;ZHANG Zhaoyang;XU Hanping;SUN Liping(State Grid Hubei Electric Power Co.,Ltd.,Economic and Technical Research Institute,Wuhan 430000,China)

机构地区：[1]国网湖北省电力有限公司经济技术研究院,湖北武汉430000

出　　处：《粘接》2025年第3期32-35,共4页Adhesion

摘　　要：为提高运维能力,有效地降低环氧树脂胶粘剂在变电设备应用过程中的温度,延长设备的使用寿命。通过对不同粒径比的Al2O3高导热环氧树脂胶粘剂进行热导率测试、击穿场强测试、介电常数测试,研究Al2O3填料的粒径对环氧树脂胶粘剂导热性能的影响。实验结果表明,适当配比的大、中、小粒径Al2O3填料能够显著提升环氧树脂胶粘剂的热导率,其中第8种配方的复合胶粘剂展现出最高的热导率,有效减少了热传导路径上的界面热阻。同时,第7种配方在保证高导热性的基础上,优化了击穿场强至32.37 kV/mm,有利于提高变电设备在高温环境下的运行安全性。此外,研究发现第3种粒径比填料体系的复合胶粘剂展现出最优的介电性能。In order to improve the operation and maintenance capabilities,effectively reduce the temperature of epoxy resin adhesive in the application process of substation equipment,and prolong the service life of equipment.The effect of the particle size of Al2O3 filler on the thermal conductivity of epoxy resin adhesive was studied by conducting thermal conductivity test,breakdown field strength test and dielectric constant test of Al2O3 high thermal conductivity epoxy resin adhesive with different particle size ratios.The experimental results showed that the appropriate ratio of large,medium and small particle size Al2O3 fillers could significantly improve the thermal conductivity of epoxy resin adhesives,and the composite adhesive of the eighth formulation showed the highest thermal conductivity,which effectively reduced the interfacial thermal resistance in the heat conduction path.At the same time,on the basis of ensuring high thermal conductivity,the seventh formula optimized the breakdown field strength to 32.37 kV/mm,which was conducive to improving the operation safety of substation equipment in high-temperature environments.In addition,it was found that the composite adhesive of the third particle size ratio filler system exhibited the best dielectric properties.

关 键 词：环氧树脂 AL2O3 击穿场强 电力设备 抗老化 

分 类 号：TQ433.437[化学工程]