碳纤维含量对铜-石墨电刷接触电压降的影响  

Influence of Carbon Fiber Percent on Contact Drop of Copper-Graphite Brush

作　　者：黄守国[1] 彭春球[1] 宗争[1] 

机构地区：[1]安徽大学物理与材料科学学院,安徽合肥230039

出　　处：《稀有金属》2007年第2期216-218,共3页Chinese Journal of Rare Metals

基　　金：安徽大学人才队伍建设经费资助项目(04校外)

摘　　要：为进一步改善铜-石墨复合材料电刷的导电和耐磨性,提高其使用寿命,研究了在通电条件下,碳纤维含量对铜-石墨电刷接触电压降的影响。结果表明,在磨损初期,随磨损时间的延长,电刷和换向器之间将形成一层润滑膜,它可降低电刷的粘着磨损,但使电刷的接触电压降增加,并维持在某个值上;随着铜-石墨复合材料电刷中碳纤维含量的增加,电刷的接触电压降将降低;但当碳纤维含量大于0.5%以后,电刷接触电压降基本不变,维持在0.5 V。In order to improve the conductivity and wearability of copper-graphite composite brush, the brush contact drop was investigated under the different percent of carbon fiber conditions. The results showed that the contact drop increased at the beginning of wear, and increasing the brush contact of the percent of drop decreased with the carbon fiber. After the percent of carbon fiber was up to 5%, the contact drop kept steady.

关 键 词：碳纤维 电刷 接触电压降 

分 类 号：TB333[一般工业技术—材料科学与工程]