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Surface Hydrophobicity of Insulator with Different Service Years for Electric Multiple Unit
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Jianjun YANG1, Mingyan WANG1, Mingliang LIU2, Qizhe ZHANG2, Shenghui WANG2, Fangcheng LÜ2
Insulating Materials | 2022, 55(1) : 47 - 51
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Insulating Materials | 2022, 55(1): 47-51
• Insulation Technology •
Surface Hydrophobicity of Insulator with Different Service Years for Electric Multiple Unit
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Jianjun YANG1, Mingyan WANG1, Mingliang LIU2, Qizhe ZHANG2, Shenghui WANG2, Fangcheng LÜ2
Affiliations
  • 1CRRC Qingdao Sifang Co., Ltd., Qingdao 266111, China
  • 2North China Electric Power University, Beijing 102206, China
Published: 2022-01-20 doi: 10.16790/j.cnki.1009-9239.im.2022.01.008
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The electric multiple unit roof insulators with different operating years were selected as research objects, and the hydrophobic analysis (contact angle method), Fourier infrared analysis, and scanning electron microscope analysis were conducted on them, respectively. The results show that with the increase of service time, the hydrophobicity of the insulator decreases rapidly, while the decreasing trend slows down year by year, and the hydrophobicity of the top umbrella skirt is generally lower than that of the middle and bottom umbrella skirts, which is consistent with the change trend of Si-CH3 content in insulator analyzed by FTIR. With the increase of service time, the surface morphology of the insulator changes significantly. The micromorphology of the electric multiple unit roof insulator serviced for 6 years is similar to that of the insulator serviced in 110 kV transmission grid for 15‒19 years, which is one of the important reasons that the hydrophobic ageing speed of electric multiple unit insulator is faster than that of transmission grid insulators.

service life  /  electric multiple unit  /  hydrophobicity  /  FTIR  /  SEM
Jianjun YANG, Mingyan WANG, Mingliang LIU, Qizhe ZHANG, Shenghui WANG, Fangcheng LÜ. Surface Hydrophobicity of Insulator with Different Service Years for Electric Multiple Unit[J]. Insulating Materials, 2022 , 55 (1) : 47 -51 . DOI: 10.16790/j.cnki.1009-9239.im.2022.01.008
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Article Info
doi: 10.16790/j.cnki.1009-9239.im.2022.01.008
  • Receive Date：2021-02-27
  • Online Date：2025-12-23
  • Published：2022-01-20
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History
  • Received：2021-02-27
  • Revised：2021-04-25
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    1CRRC Qingdao Sifang Co., Ltd., Qingdao 266111, China
    2North China Electric Power University, Beijing 102206, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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