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浙江大学学报(工学版)
浙江大学学报(工学版)
机械工程     
粗糙表面形貌对电蚀的影响
汪久根1,冯兰兰1,李阳2
1.浙江大学 机械工程学院,浙江 杭州 310027；2.中国矿业大学 机电工程学院,江苏 徐州 221116
Influences of surface topography on electrical pitting
WANG Jiu gen1,FENG Lan lan1,LI Yang2
1.Department of Mechanical Engineering,Zhejiang University,Hangzhou 310027,China；2.School of Mechatronic Engineering,China University of Mining and Technology,Xuzhou 221116,China
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摘要：
以名义线接触副轴承和齿轮为研究对象,用分形方法模拟三维粗糙表面,建立由一个粗糙表面与一个光滑刚性平面接触的简单模型和由2个粗糙表面接触的复杂模型,建立粗糙表面的矩形斑点接触电阻计算模型和电流密度计算模型,从接触电阻和电流密度2个角度来考虑粗糙表面形貌对电蚀的影响.分析接触载荷和分形参数对实际接触面积、接触电阻和电流密度的影响；在恒定载荷下,研究接触电阻和电流密度与粗糙度之间的定量关系.结果表明,从接触电阻或电流密度方面,增加轴承和齿轮表面间的接触载荷和减小表面粗糙度可以防止电蚀的发生,因此接触电阻和电流密度一样可以用来作为电蚀发生的判据.在实际应用中,主动设计最佳的接触载荷大小以及最佳的表面粗糙度可以防止电蚀的发生,并且在研究粗糙表面接触问题时应采用复杂的接触模型.所提出的计算方法可以分析表面电蚀失效.
Abstract:
For the bearings and gears in nominal line contacts, the three dimensional rough surfaces of elements were simulated with two fractal models, a simple contact model with the contact between a rough  surface and a smooth rigid plane, and a complicated contact model with the contact of two rough surfaces were established. The calculation models of contact resistance with rectangular spots and current density of rough surfaces were established. The influences of surface topography on electrical pitting were analyzed from the point of contact resistance and current density. The influences of contact load and fractal parameters on the real contact area, contact resistance and current density were analyzed.  And the quantitative relationship between contact resistance and surface roughness as well as that between current density and surface roughness were studied under constant load. The results demonstrate that, either from the perspective of contact resistance or that of current density, the increase of the contact load and the reduction of the surface roughness of bearings and gears can prevent  electrical
pitting. Therefore, contact resistance can be used as an evaluation criterion of  electrical pitting as well as current density. In practical applications, the active design of optimal contact load and optimal surface roughness can prevent electrical pitting, and the complicated model should be used in the study of contact problems between rough surfaces. The proposed method can analyze the surface failures of electrical pitting．
出版日期: 2015-11-01
:  TH 117  
基金资助:
国家自然科学基金资助项目（51375436）；国家“863”高技术研究发展计划资助项目（2015AA043002）.
作者简介: 汪久根（1963-），男，教授,博导，从事摩擦学与仿生设计.ORCID:0000 0001 8720 1005.E-mail:me_jg@zju.edu.cn
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引用本文:

汪久根,冯兰兰,李阳. 粗糙表面形貌对电蚀的影响[J]. 浙江大学学报(工学版), 10.3785/j.issn.1008 973X.2015.11.001.

WANG Jiu gen,FENG Lan lan,LI Yang. Influences of surface topography on electrical pitting. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 10.3785/j.issn.1008 973X.2015.11.001.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008 973X.2015.11.001    或    http://www.zjujournals.com/eng/CN/Y2015/V49/I11/2025

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