摘要
采用二次热压和真空浸渍工艺制备树脂基受电弓滑板试样。并模拟滑板正常运行条件进行室内载流磨损实验，通过SEM和EDS分别对滑板磨损表面及其磨屑、截面形貌和滑板元素成分进行分析。结果表明，在载流磨损过程中，随电流密度和滑行速度的增加滑板的磨损率逐渐增大；硅油能有效地抑制滑板／铜在周期性接触．分离条件下产生的交流电弧，未浸渍处理滑板的磨损率比经真空浸渍处理的大1．6～2．1倍；滑板／铜载流磨损机理主要为电弧侵蚀磨损和氧化磨损的交互作用，同时伴随着粘着磨损；在电弧作用下，硅油受热气化和发生热分解吸收部分电弧热，有利于弧隙熄弧。
The resin-matrix pantograph contact strip （RMPCS） was prepared by using hot re-pressing and vacuum-impregnation process. The tribological behaviors with electrical current of RMPCS against copper were measured under the indoor simulated conditions of normal running conditions. The characteristics of worn surfaces, wear debris, cross-section and typical elemental distributions of RMPCS were studied by scanning electron microscopy （SEM） and energy dispersion spectrometer （EDS）, respectively. The results show that the wear rate of RMPCS increases with increasing sliding speed and electrical current density. The silicon oil can effectively inhibit the alternating current arc of RMPCS against copper, which is produced periodically between the separating or contacting course. The wear rate of RMPCS against copper without impregnating technology is about 1.6～2.1 times higher than the value with vacuum impregnating technology. The main wear mechanism of RMPCS against copper is arc erosion wear and oxidative wear, which is accompanied by adhesive wear during electrical sliding wear process. Silicon oil has evaporation and thermal decomposition under the stress of electric arc, which can absorb part of arc heat and is beneficial to arc extinguishing.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2008年第8期1479-1486,共8页
The Chinese Journal of Nonferrous Metals
基金
湖南省重点实验室开放基金资助项目(06FJ3041)
关键词
电弧侵蚀
磨损机理
滑板
熄弧原理
浸渍
arc erosion
wear mechanism
contact strip
arc extinguishing theory
impregnation
