滑动电接触界面粗糙度对电枢熔化特性的影响

doi:10.19595/j.cnki.1000-6753.tces.170903

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Abstract In the process of electromagnetic launch, the surface melting of the armature will change the contact state betweenarmature and rail. Once the contact state is destroyed, the transition is easy to occur. Therefore, it is necessary to analyze the melting characteristics of the surface of armature. Considering the contact surface roughness between armature and rail, the Reynolds equation of the metal liquid layer of the contact surface is listed, the temperature field, stress field and electromagnetic field are coupled, and the thermo-elastic-magnetohydrodynamics model is established, based on this,the effect of roughness magnitude and distribution of the contact surface on the surface melting speed of armature and thickness of metal liquid layer are analyzed. Under the setting parameters, the results show thatthe greater the magnitude of contact surface roughness, the bigger melting speed of the surface of armature, and at the same time, the greater the minimum thickness of metal liquid layer.Compared to the distribution of roughness, the magnitude ofcontact surface roughness has a greater effect. The analysis results are of great significance for improving the contact state between armature and rail and avoiding the transition.

Key words： Sliding electrical contact roughness melt metal liquid layer magnetohydrodynamics

Received: 26 June 2017 Published: 12 April 2018

PACS:

TM359.4

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	Articles by authors
	Li Bai
	Lu Junyong
	Tan Sai
	Jiang Yuanzhi
	Zhang Yongsheng

Cite this article:

Li Bai,Lu Junyong,Tan Sai等. Effectof Interfacial Roughness of Sliding Electrical Contact on the Melting Characteristics of Armature[J]. Transactions of China Electrotechnical Society, 2018, 33(7): 1607-1615.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.170903 OR https://dgjsxb.ces-transaction.com/EN/Y2018/V33/I7/1607

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