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Thermal ageing state detection of cable joint silicone rubber based on non-linear ultrasonic
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Li KE1, Chunhua FANG1, Guangde GAO1, Rong XIA2, Benhong OUYANG2, Haixin YOU1, Guorui ZHOU1
Insulating Materials | 2023, 56(5) : 103 - 108
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Insulating Materials | 2023, 56(5): 103-108
• Test and Analysis •
Thermal ageing state detection of cable joint silicone rubber based on non-linear ultrasonic
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Li KE1, Chunhua FANG1, Guangde GAO1, Rong XIA2, Benhong OUYANG2, Haixin YOU1, Guorui ZHOU1
Affiliations
  • 1College of Electricity and New Energy, China Three Gorges University, Yichang 443002, China
  • 2China Electric Power Sciences Institute, Wuhan 430074, China
Published: 2023-05-20 doi: 10.16790/j.cnki.1009-9239.im.2023.05.016
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Aiming at the thermal ageing problem of silicone rubber, a non-linear ultrasonic testing method was introduced to carried out related experimental research. The silicone rubber samples of cable joint were conducted thermal ageing test at 200℃ for different time, and the variation trends of relative non-linear coefficient, micro structure, and surface morphology of the aged samples were tested and analyzed. The results show that with the increase of thermal ageing time, the relative non-linear coefficient of the silicone rubber shows an obvious increasing trend. On the basis of the test results, it is obtained that there is a good linear correlation between the relative non-linear coefficient and the thermal ageing time, and the determination coefficient R2 is greater than 0.95. After thermal ageing, the organic content of silicone rubber decreases gradually, the crosslinking degree increases gradually, and the micro defects such as local holes, cracks, and filler precipitation begin to appear on the surface. The microstructure undergoes a certain degree of degradation, which results in the enhancement of ultrasonic non-linear effect.

cable joint  /  silicone rubber  /  non-linear ultrasonic  /  thermal ageing  /  microscopic test
Li KE, Chunhua FANG, Guangde GAO, Rong XIA, Benhong OUYANG, Haixin YOU, Guorui ZHOU. Thermal ageing state detection of cable joint silicone rubber based on non-linear ultrasonic[J]. Insulating Materials, 2023 , 56 (5) : 103 -108 . DOI: 10.16790/j.cnki.1009-9239.im.2023.05.016
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Article Info
doi: 10.16790/j.cnki.1009-9239.im.2023.05.016
  • Receive Date：2022-04-26
  • Online Date：2025-11-21
  • Published：2023-05-20
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History
  • Received：2022-04-26
  • Revised：2022-06-13
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Affiliations
    1College of Electricity and New Energy, China Three Gorges University, Yichang 443002, China
    2China Electric Power Sciences Institute, Wuhan 430074, 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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