高电导率雾对复合绝缘子憎水性的影响

发布时间：2018-05-13 16:30

本文选题：复合绝缘子 + 憎水性　；参考：《电网技术》2014年07期

【摘要】：沿海地区的海雾以及城市工业区的浓雾,其雾水的电导率高,会导致绝缘子快速积污,并可能对复合绝缘子憎水性能产生影响,研究了高电导率雾环境下染污硅橡胶表面的憎水性能变化过程。利用超声波雾发生装置来产生高电导率雾,在小雾室内使染污的硅橡胶试片受潮,采用静态接触角法测量染污试片表面的憎水性在受潮前后的变化。试验发现,在高电导率雾中受潮会导致染污硅橡胶试片表面的憎水性下降。受潮结束后,污层表面的憎水性恢复情况和污秽物中的不溶物成分有关;污秽中可溶盐成分与不溶物成分的比值越高,对憎水性恢复越不利;此外,环境湿度越高,越不利于憎水性恢复。分析认为,高电导率雾导致硅橡胶表面污层的盐密值增加,增强了污层的吸水能力,是染污硅橡胶表面憎水性下降的原因。
[Abstract]:The sea fog in coastal areas and the dense fog in urban industrial areas have high conductivity, which can lead to the rapid accumulation of dirt on insulators and may have an impact on the hydrophobicity of composite insulators. The hydrophobicity of contaminated silicone rubber surface under high conductivity fog was studied. The ultrasonic fog generator was used to produce the high conductivity fog, and the contaminated silicone rubber test piece was moistened in the fog chamber. The hydrophobicity of the surface of the contaminated sample was measured by static contact angle method before and after the damp. It is found that the hydrophobicity of the surface of contaminated silicone rubber will be decreased by moisture in high conductivity fog. After the damp, the hydrophobicity recovery on the surface of the polluted layer is related to the insoluble composition in the polluted material; the higher the ratio of soluble salt to insoluble component in the pollution is, the more unfavorable to the recovery of hydrophobicity; in addition, the higher the environmental humidity, the higher the hydrophobicity recovery. The more unfavorable the hydrophobic recovery. It is concluded that the high conductivity fog increases the salt density of the contaminated layer on the surface of silicone rubber and enhances the water absorption ability of the contaminated layer, which is the reason for the decrease of hydrophobicity on the surface of contaminated silicone rubber.
【作者单位】：清华大学深圳研究生院;深圳供电局有限公司;
【基金】：国家自然科学基金项目(51377093)~~
【分类号】：TM216

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