摘要
载流摩擦副摩擦磨损性能的稳定性决定机构的服役性能和寿命。本文选取具有接触电阻小、电噪声小等优点的Au Ni9/PdNi-Au摩擦副,通过摩擦因数和接触电压降曲线、相对稳定系数、标准差及频数分布等多项统计学评价指标,研究在180、280和380 mN载荷下摩擦副的载流摩擦稳定性。结果表明,载荷为180 mN时,Au Ni9电刷的磨损机制以黏着磨损和磨粒磨损为主,当载荷升高至380 mN时,电刷的磨损机制主要为疲劳磨损和磨粒磨损。随载荷增加,Au Ni9/Pd Ni-Au摩擦副的摩擦稳定性先升高后降低,电接触稳定性逐渐提高。在载荷为280 mN时,摩擦因数的平均值为0.330,标准差为0.180,接触电压降的平均值为89.723m V,标准差为41.419m V,电刷表面粗糙度为0.207μm,均为三种载荷下的最小值,Au Ni9/Pd Ni-Au摩擦副表现出较好的载流摩擦稳定性。
The stability of friction and wear properties of current-carrying friction pair determines the service performance and life of the mechanism. In this paper, AuNi9/PdNi-Au friction pair with the advantages of low contact resistance and low electrical noise was selected. The current friction stability of the friction pair under 180, 280 and 380m N loads was studied by multiple statistical evaluation indexes such as friction coefficient, contact voltage drop curve,relative stability coefficient, standard deviation and frequency distribution. The results show that when the load is 180m N, the wear mechanism of the AuNi9 brush is mainly adhesive wear and abrasive wear. The wear mechanism of the brush is mainly fatigue wear and abrasive wear when the load increases to 380 mN. With the increase of the load, the friction stability of the AuNi9/PdNi-Au friction pair first increases and then decreases, and the electrical contact stability increases gradually. When the load is 280 mN, the average friction coefficient is 0.330, the standard deviation is 0.180,the average contact voltage drop is 89.723 mV, the standard deviation is 41.419 mV, and the brush surface roughness is 0.207 μm, all are the minimum values under three kinds of loads. The friction pair shows good current carrying friction stability.
作者
于芯悦
马志飞
张雷
张鑫
康潇
YU Xinyue;MA Zhifei;ZHANG Lei;ZHANG Xin;KANG Xiao(State Key Laboratory of Powder Metallurgy,Central South University,Changsha 410083,China;Aerospace System Engineering Shanghai,Shanghai 201109,China;School of Chemistry and Chemical Engineering,Central South University,Changsha 410083,China)
出处
《粉末冶金材料科学与工程》
2022年第6期648-658,共11页
Materials Science and Engineering of Powder Metallurgy
