Study on current-carrying tribological characteristics of C-Cu sliding electric contacts under water accumulation from rainfall condition

Pantograph-OCS system sliding electrical contact is the only way for train energy transmission, which determines the safety and stability of energy transfer. And the current-carrying wear is the core factor that affecting the service performance of C-Cu contact pairs. C-Cu mate pairs often work for...

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Veröffentlicht in:Physica scripta 2024-05, Vol.99 (5), p.55970
Hauptverfasser: Gao, Guoqiang, Wang, Qingsong, Wang, Hong, Qian, Pengyu, Peng, Wei, Ma, Yaguang, Dong, Deliang, Wang, Xiangfei, He, Shuhang, Yang, Zefeng, Wu, Guangning
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container_end_page
container_issue 5
container_start_page 55970
container_title Physica scripta
container_volume 99
creator Gao, Guoqiang
Wang, Qingsong
Wang, Hong
Qian, Pengyu
Peng, Wei
Ma, Yaguang
Dong, Deliang
Wang, Xiangfei
He, Shuhang
Yang, Zefeng
Wu, Guangning
description Pantograph-OCS system sliding electrical contact is the only way for train energy transmission, which determines the safety and stability of energy transfer. And the current-carrying wear is the core factor that affecting the service performance of C-Cu contact pairs. C-Cu mate pairs often work for a long time in rainy/humid environments due to its exposed nature of work, and the contact interface often accumulates a large amount of water. Existing operating experience has shown that the carbon sliding plate of the pantograph experiences abnormal wear and frequent failure during rainfall, resulting in a significant decrease in service performance and lifespan. This article found that the thickness of the water film at the contact interface has a significant impact on the current carrying friction and wear performance of C-Cu contact pairs. When the thickness of the water film exceeds a certain range, the carbon skateboard will cause abnormal wear under high current, with the wear amount being more than three times the minimum value. The contact resistance also increases by 53.9%, which is related to the obstruction of current transmission. It also proves that the water film lubrication effect can be restored during the process of rainfall decreasing from large to small. The research can help to provide a suitable maintenance policy for pantograph and catenary system during the rainy season.
doi_str_mv 10.1088/1402-4896/ad30e0
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This article found that the thickness of the water film at the contact interface has a significant impact on the current carrying friction and wear performance of C-Cu contact pairs. When the thickness of the water film exceeds a certain range, the carbon skateboard will cause abnormal wear under high current, with the wear amount being more than three times the minimum value. The contact resistance also increases by 53.9%, which is related to the obstruction of current transmission. It also proves that the water film lubrication effect can be restored during the process of rainfall decreasing from large to small. The research can help to provide a suitable maintenance policy for pantograph and catenary system during the rainy season.</abstract><pub>IOP Publishing</pub><doi>10.1088/1402-4896/ad30e0</doi><tpages>14</tpages><orcidid>https://orcid.org/0000-0002-6822-0742</orcidid></addata></record>
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subjects current-carrying friction
electrical contact
rainfall levels
title Study on current-carrying tribological characteristics of C-Cu sliding electric contacts under water accumulation from rainfall condition
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