Study on the delamination wear and its influence on the conductivity of the carbon contact strip in pantograph-catenary system under high-speed current-carrying condition
Study on the delamination wear and its influence on the conductivity of the carbon contact strip in pantograph-catenary system under high-speed current-carrying condition
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高速载流条件下受电弓接触网碳接触带分层磨损及其对电导率的影响研究
DOI：
10.1016/j.wear.2021.203823
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发表时间：
2021-03
期刊：
影响因子：
5
通讯作者：
Kai Wang
中科院分区：
文献类型：
--
作者：
Hongjuan Yang;Chao Li;Yanhua Liu;Lin Fu;Gang Jiang;Xiaolu Cui;Bo Hu;Kai Wang
在高速载流条件下，相对于其它磨损机制，剥层磨损对碳带的磨损行为和表面性能影响更大。在100 ~ 350 km/h高速、250 A载流和不同法向载荷下，研究了接触副间的电弧放电、接触片的磨损特性以及碳片磨损表面的导电性。利用扫描电子显微镜（SEM）观察了碳带的磨损形貌。试验结果表明，电弧放电量的增加明显改变了接触带的磨损机制，电弧放电强度的大小直接决定了剥层磨损的发生。此外，由于接触带磨损机理的不同，碳带的磨损率值也有显著差异。此外，分层磨损增加了接触带表面的电阻率。为了最大限度地减少接触片的磨损率并保持良好的导电性，施加的法向载荷应接近电弧放电抑制载荷，该载荷随滑动速度的增加而增加。
Delamination wear has more influence on the wear behavior and surface properties of carbon strip comparing with other wear mechanisms under high-speed current-carrying conditions. The arc discharge between the contact pairs, the wear characteristics of contact strip and the conductivity of the worn surface of the carbon strips were studied under high-speed from 100 km/h to 350 km/h, current-carrying of 250A and different normal loads. The worn morphology of the carbon strip was observed utilizing a scanning electron microscope (SEM). The experimental results show that the increase of arc discharge obviously changes the wear mechanism of the contact strip and the strength of the arc discharge directly determines the occurrence of the delamination wear. Besides, the values of the wear rate of the carbon strip are different significantly due to the difference in wear mechanism of the contact strip. Moreover, the delamination wear increases the resistivity of the surface of the contact strip. To minimize the wear rate of the contact strip and maintain a good conductivity, the applied normal load should close to arc discharge suppressive load, which was increased with the increasing of the sliding speed.
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影响因子：
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作者：
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通讯作者：
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影响因子：
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作者：
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