45kV薄壁加热器环氧树脂高温绝缘试验研究  

Experimental study on high temperature resistance and insulation performance of epoxy resin for 45 kV thin wall heater

作　　者：沈默 潘皖江[1,2] 刘常乐 朱银锋 Mohmmed Mun ELseed Hassaan 吴诚 Shen Mo;Pan Wanjiang;Liu Changle;Zhu Yinfeng;Mohmmed Mun ELseed Hassaan;Wu Cheng(University of Science and Technology of China,Hefei 230031,China;Institute of Plasma Physics,Chinese Academy of Sciences,Hefei 230022,China;School of Mechanical and Vehicle Engineering,West Anhui University,Luan 237012,China;School of Mechanical and Electrical Engineering,Anhui Jianzhu University,Hefei 230601,China)

机构地区：[1]中国科学技术大学,合肥230031 [2]中国科学院合肥物质科学研究院等离子体物理研究所,合肥230022 [3]皖西学院机械与车辆工程学院,六安237012 [4]安徽建筑大学机械与电气工程学院,合肥230601

出　　处：《低温与超导》2023年第10期7-12,共6页Cryogenics and Superconductivity

基　　金：国家自然科学基金(51877001);安徽省高校自然科学研究重点项目(KJ2019A0789)资助。

摘　　要：环氧树脂是45 kV级薄壁加热器主要绝缘材料,它在高温、高电压状态下的绝缘性能对设备的安全至关重要。本文将环氧树脂样品经高温处理后通过红外光谱测试、介电常数测试、直流耐压测试研究材料的物化性质变化。在结果中观察到了环氧树脂材料的表面和内部的差异性变化,在材料表层发生了氧化反应,有酰胺、酮以及羧酸的产生,在内部发生了二次固化反应。研究发现材料的整体耐压强度与加热时间正相关、与加热温度正相关。实验证明等于或低于140℃温度条件下环氧树脂材料的绝缘性能安全可靠。Epoxy resin is the key insulation material for 45 kV thin-walled heater,its insulation performance under high temperature is crucial for the safety of equipment.In this paper,the physicochemical properties of epoxy resin after high-temperature treatment were studied by infrared spectroscopy testing,dielectric constant testing and DC withstand voltage testing.The results reveal that different changes occur on the surface and inside of the epoxy resin,which meansoxidation reactions,spliting of amides,ketones and carboxylic acids generated on the surface of the material,while secondary curing reactions happened inside.The insulation strength of epoxy resin system is positively correlated with heating time and heating temperature.This work indicated that the insulation performance of epoxy resin materials is safe and reliable at temperatures equal to or below 140 ℃.

关 键 词：绝缘性能 环氧树脂 薄壁加热器 超导磁体 电流引线 ITER 

分 类 号：TM215[一般工业技术—材料科学与工程]