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Life Evaluation of Rubber Sealing Ring for Oil-immersed Transformer Based on Arrhenius Model
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Shanshan LIAO1, Dongsheng HE2, Kaining QIN1, Yunfei CAO3, Jingmin FAN3, Shungui LIU1, Yonglin TANG4
Insulating Materials | 2022, 55(3) : 59 - 66
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Insulating Materials | 2022, 55(3): 59-66
• Insulation Technology •
Life Evaluation of Rubber Sealing Ring for Oil-immersed Transformer Based on Arrhenius Model
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Shanshan LIAO1, Dongsheng HE2, Kaining QIN1, Yunfei CAO3, Jingmin FAN3, Shungui LIU1, Yonglin TANG4
Affiliations
  • 1Shenzhen Power Supply Bureau Co., Ltd., Shenzhen 518001, China
  • 2National Smart Grid Transmission and Distribution Equipment Quality Inspection and Testing Center, Dongguan 523325, China
  • 3College of Automation, Guangdong University of Technology, Guangzhou 510006, China
  • 4Smart Inspection Technology (Guangzhou) Co., Ltd., Guangzhou 510665, China
Published: 2022-03-20 doi: 10.16790/j.cnki.1009-9239.im.2022.03.008
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In order to solve the problem of transformer oil leakage caused by the ageing failure of rubber sealing rings, the rubber sealing rings was conducted life evaluation research. Since there is low oxygen content and a small amount of H2S retained as an oxidation inhibitor in the transformer insulating oil, and the sealing rubber ages faster in a strong oxidizing medium, we choose H2S+hot air and hot air environment to conduct ageing tests. The dynamic curve direct method was adopted. According to the relationship between the performance change of rubber and ageing time and the Arrhenius model, accelerated ageing tests were carried out at three different temperatures, and the compression set rate was used as the performance index. The relationship between the performance change rate constant k and the life estimation value t under two environment was obtained to estimate the service life. The results show that the performance of rubber sealing ring degrade in different degrees under hot air and H2S+hot air environment. With the increase of ageing time and ageing temperature, its hardness increases, and the elastic recovery ability changes to be poor. According to the established life estimation formula, the service life of EPDM rubber sealing ring is predicted to be 33 years and 35 years under hot air and H2S+hot air environment, respectively.

oil-immersed transformer  /  rubber sealing ring  /  artificial accelerated ageing  /  Arrhenius  /  life evaluation
Shanshan LIAO, Dongsheng HE, Kaining QIN, Yunfei CAO, Jingmin FAN, Shungui LIU, Yonglin TANG. Life Evaluation of Rubber Sealing Ring for Oil-immersed Transformer Based on Arrhenius Model[J]. Insulating Materials, 2022 , 55 (3) : 59 -66 . DOI: 10.16790/j.cnki.1009-9239.im.2022.03.008
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Article Info
doi: 10.16790/j.cnki.1009-9239.im.2022.03.008
  • Receive Date：2021-05-22
  • Online Date：2025-12-22
  • Published：2022-03-20
Article Data
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History
  • Received：2021-05-22
  • Revised：2021-07-11
Funding
Affiliations
    1Shenzhen Power Supply Bureau Co., Ltd., Shenzhen 518001, China
    2National Smart Grid Transmission and Distribution Equipment Quality Inspection and Testing Center, Dongguan 523325, China
    3College of Automation, Guangdong University of Technology, Guangzhou 510006, China
    4Smart Inspection Technology (Guangzhou) Co., Ltd., Guangzhou 510665, China
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https://castjournals.cast.org.cn/joweb/jycl/EN/10.16790/j.cnki.1009-9239.im.2022.03.008
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表12种不同金属材料的力学参数
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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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