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Dynamic contact characteristics between hoisting rope and friction lining in the deep coal mine.pdf
Engineering Failure Analysis 64 (2016) 44–57
Contents lists available at ScienceDirect
Engineering Failure Analysis
journal homepage: /locate/engfailanal
Dynamic contact characteristics between hoisting rope and friction lining in the deep coal mine
Dagang Wang a,?, Daoai Wang b
a School of Mechatronic Engineering, China University of Mining and Technology, Xuzhou 221116, China b State Key Laboratory of Solid Lubrication, Lanzhou Institute Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China
article info
Article history: Received 14 November 2015 Received in revised form 25 February 2016 Accepted 7 March 2016 Available online 9 March 2016
Keywords: Rope Friction lining Dynamic contact Stick–slip Coal mine
abstract
Dynamic contact characteristics between hoisting rope and friction lining in the deep coal mine were analyzed in the present study. Dynamic rope tension and tension differences were obtained using Simulink simulation models. Evolutions of slip states and stress distributions along the groove bottom of friction lining during hoisting, and the effect of coef?cient of friction on those evolutions, were explored employing ?nite element analyses. The results show that ?uctuating rope tensions and tension differences during hoisting exhibit three stages. The wear failure is more likely to occur along contacting surfaces between the rope and friction lining. Contact arcs between the rope and friction lining consist of two frictional arcs with severe damage and a sticking arc with slight damage. Dynamic contact status during hoisting consists of a slip regime and a mixed regime. Larger tension difference results in larger relative slips, contact pressure and equivalent stress. Frictional arcs exhibit more serious wear due to higher stress levels as compared to the sticking arc. An increase of coef?cient of friction reduces the possibility of gross slip and wear between the rope and friction lining.
? 2016 Elsevier Ltd. All rights reserved.
1. Intro
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