Dynamic contact characteristics between hoisting rope and friction lining in the deep coal mine |
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| Affiliation: | 1. School of Mechatronic Engineering, China University of Mining and Technology, Xuzhou 221116, China;2. State Key Laboratory of Solid Lubrication, Lanzhou Institute Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China;1. National Research Council (C.N.R.) — Institute of Marine Sciences (I.S.MAR.) U.O.S of Genoa, Via Antonio de Marini 6, 16149 Genoa, Italy;2. Institute for Environmental Protection and Research (I.S.P.R.A.), Via Vitaliano Brancati 48, 00144 Rome, Italy;1. Jiangsu Key Laboratory of Mine Mechanical and Electrical Equipment, School of Mechatronic Engineering, China University of Mining and Technology, Xuzhou 221116, China;2. School of Mechanical Electronic & Information Engineering, China University of Mining & Technology-Beijing, Beijing 100083, China;3. School of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou 221116, China;4. School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou 221116, China |
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| 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 coefficient of friction on those evolutions, were explored employing finite element analyses. The results show that fluctuating 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 coefficient of friction reduces the possibility of gross slip and wear between the rope and friction lining. |
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