银基复合材料电刷的摩擦磨损特性
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摘要
基于Archard模型建立了电刷与导电环之间摩擦过程的磨损模型。搭建了导电环摩擦磨损试验台,对银基复合材料电刷的电接触摩擦磨损性能进行了实验验证。结果表明,大的接触压力会使表面微凸体更容易发生塑性变形而形成磨屑;载流会在电刷材料表面形成波纹状磨痕并产生粉末状的磨屑;磨损率在磨损初期会由于接触面积较小和表面加工硬化的作用出现先升后降的变化规律;对磨损率模型进行修正,使该磨损率模型对银基复合材料电刷磨损率的预测较为准确,为进一步研发银基复合材料电刷提供了理论指导和实验依据。
Based on the Archard wear model, a mathematical wear rate model in the course of friction between brush and conducting ring was set up. A friction and wear test bench for conducting ring was built, the friction and wear performance of electro-contact of silver-based composite brush is verified experimentally. We can conclude that a large contact pressure makes micro-convexs on the surface to the state of plastic deformation and forming abrasive particles more easily. The carrying current forms corrugated abrasion marks on the surface of the brush material and produces powder abrasive particles.The wear rate increases first and then decreases at the beginning of wear due to the small contact area and the hardening effect of surface processing.The wear rate model is modified so that it is more accurate to predict the wear rate of silver base composite brush.This study provides theoretical guidance and experimental basis for further research and development of silver-based composite brush.
Based on the Archard wear model, a mathematical wear rate model in the course of friction between brush and conducting ring was set up. A friction and wear test bench for conducting ring was built, the friction and wear performance of electro-contact of silver-based composite brush is verified experimentally. We can conclude that a large contact pressure makes micro-convexs on the surface to the state of plastic deformation and forming abrasive particles more easily. The carrying current forms corrugated abrasion marks on the surface of the brush material and produces powder abrasive particles.The wear rate increases first and then decreases at the beginning of wear due to the small contact area and the hardening effect of surface processing.The wear rate model is modified so that it is more accurate to predict the wear rate of silver base composite brush.This study provides theoretical guidance and experimental basis for further research and development of silver-based composite brush.
引文
[1]堵永国,张为军,胡君遂.电接触与电接触材料(六)[J].电工材料,2006(3):49-54.
[2] PARK D, KOLIVAND M, KAHRAMANA A. Prediction of surface wear of hypoid gears using a semi-analytical contact model[J]. Mechanism and Machine Theory, 2012,52:180-194.
[3]布朗洛维克,康奇兹,米西金.电接触理论、应用与技术[M].北京:机械出版社,2010:78.
[4]王洪发.金属耐磨材料的现状与发展[J].铸造,2000,49:577-591.
[5] CHEN G X, YANG H J. Experimental study on arc ablation occurring in a contact strip rubbing against a contact wire with electrical current[J]. Tribology International, 2013, 61:88-94.
[6] TRINH K E, TSIPENYUK A, VARENBERG M, et al.Wear debris and electrical resistance in textured Sn-coated Cu contacts subjected tofretting[J]. Wear, 2015, 344-345(4):86-98.
[7]孙志礼,陈良玉.实用机械可靠性设计理论与方法[M].北京:科学出版社,2003.
[8] MOOR M A, KING F S. Abrasive wear of brittle solids[J].Wear,1980,60:123-139.
[9]邵荷生,张清.金属的磨料磨损与耐磨材料[M].北京:机械工业出版社,1988,45-48.
[10] ARCHARD J F. Contact and rubbing of flat surfaces[J].Journal of Applied Physics,1953, 24(8):981-988.
[11] PARK Y W, RAMESH BABU GNK., LEE K Y. The influence of current load on fretting of electrical contacts[J]. TriBology International,2009, 42(5):682-689.
[12]李聪波,何娇,等.基于Archard模型的机床导轨磨损模型及有限元分析[J].机械工程学报,2016,52(15):107-113.
[13] KAWAKAME M, BERSSAN J D. Study of wear in self-lubricating composites for application in seals of electric motors[J].Journal of Materials Processing Technology, 2006, 179(1-3):74-80.
[14] LIU E Y, WANG W Z, GAO Y M, et al. Tribological properties of Ni-based self-lubricating composites with addition of silver and molybdenum disulfide[J]. Tribology International,2013, 57(4):235-241.
[15] XU J, ZHU M H, ZHOU Z R, et al. An investigation on fretting wear life of bonded MoS2 solid lubricant coatings in complex conditions[J]. Wear, 2003, 255(1-6):253-258.
[16]孟令通,等.Ag-Cu-MoS_2复合材料的真空载流磨损性能[J].摩擦学学报,2016,36(6):755-760.
[2] PARK D, KOLIVAND M, KAHRAMANA A. Prediction of surface wear of hypoid gears using a semi-analytical contact model[J]. Mechanism and Machine Theory, 2012,52:180-194.
[3]布朗洛维克,康奇兹,米西金.电接触理论、应用与技术[M].北京:机械出版社,2010:78.
[4]王洪发.金属耐磨材料的现状与发展[J].铸造,2000,49:577-591.
[5] CHEN G X, YANG H J. Experimental study on arc ablation occurring in a contact strip rubbing against a contact wire with electrical current[J]. Tribology International, 2013, 61:88-94.
[6] TRINH K E, TSIPENYUK A, VARENBERG M, et al.Wear debris and electrical resistance in textured Sn-coated Cu contacts subjected tofretting[J]. Wear, 2015, 344-345(4):86-98.
[7]孙志礼,陈良玉.实用机械可靠性设计理论与方法[M].北京:科学出版社,2003.
[8] MOOR M A, KING F S. Abrasive wear of brittle solids[J].Wear,1980,60:123-139.
[9]邵荷生,张清.金属的磨料磨损与耐磨材料[M].北京:机械工业出版社,1988,45-48.
[10] ARCHARD J F. Contact and rubbing of flat surfaces[J].Journal of Applied Physics,1953, 24(8):981-988.
[11] PARK Y W, RAMESH BABU GNK., LEE K Y. The influence of current load on fretting of electrical contacts[J]. TriBology International,2009, 42(5):682-689.
[12]李聪波,何娇,等.基于Archard模型的机床导轨磨损模型及有限元分析[J].机械工程学报,2016,52(15):107-113.
[13] KAWAKAME M, BERSSAN J D. Study of wear in self-lubricating composites for application in seals of electric motors[J].Journal of Materials Processing Technology, 2006, 179(1-3):74-80.
[14] LIU E Y, WANG W Z, GAO Y M, et al. Tribological properties of Ni-based self-lubricating composites with addition of silver and molybdenum disulfide[J]. Tribology International,2013, 57(4):235-241.
[15] XU J, ZHU M H, ZHOU Z R, et al. An investigation on fretting wear life of bonded MoS2 solid lubricant coatings in complex conditions[J]. Wear, 2003, 255(1-6):253-258.
[16]孟令通,等.Ag-Cu-MoS_2复合材料的真空载流磨损性能[J].摩擦学学报,2016,36(6):755-760.