China Safety Science Journal ›› 2018, Vol. 28 ›› Issue (8): 55-60.doi: 10.16265/j.cnki.issn1003-3033.2018.08.010

• Safety Science of Engineering and Technology • Previous Articles     Next Articles

Multi objective optimization of shearer drum parametersand its influence on strength of rocker arm

SHI Jianguo1,2 , GAO Guangcai3 , TENG Rui1   

  1. 1 College of Mechanical Engineering,Liaoning Technical University,Fuxin Liaoning 123000,China;
    2 China National Coal Association,Dynamic Research for High-End Complete Integrated Coal Mining Equipment and Big Data Analysis Center,Fuxin Liaoning 123000,China;
    3 Fuxin Jinguang Mining Machinery Manufacturing Co.,Ltd.,Fuxin Liaoning 123000,China
  • Received:2018-05-10 Revised:2018-07-12 Online:2018-08-28 Published:2020-11-25

Abstract: In order to reduce the cutting ratio of cutting ratio and load fluctuation in the working of the shearer drum,and improve the safety performance of the shearer,the parameters of the diameter of the shearer drum,the spiral angle of the blade and the cutting depth of the drum were optimized.Through the optimization of the objective function and the constraint conditions,the improved genetic algorithm was used to solve the optimization problem,and the parameters of the shearer drum were optimized.The stress distribution and fatigue life cycle times of the shearer's rocker arm before and after the optimization as well as the influence of working load of drum on safety performance of shearer rocker arm before and after the optimization were analyzed by using the finite element software and the fatigue life analysis module.The study shows that the optimized shearer drum has an average reduction of 45.6% in specific energy consumption and an average of 1.3% in the load fluctuation index,and the maximum stress value of the shell of the rocker shell is reduced by 12.34% compared with the extreme value before the optimization,and that optimization of drum parameters improves the safety performance of shearer rocker.

Key words: drum of coal mining machine, multi-objective optimization, structure optimization, arm strength, fatigue life

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