摘要
采煤机截割夹矸煤层时,螺旋滚筒易失效。为提高螺旋滚筒的可靠性,基于刚柔耦合技术、灵敏度设计理论和相关失效性理论进行优化设计;基于破煤机理,对螺旋滚筒的瞬时负载进行数值模拟,建立采煤机刚柔耦合虚拟样机联合仿真模型,通过刚柔耦合虚拟样机仿真获得螺旋滚筒的薄弱区域、应力和振动性能指标;结合可靠性灵敏度理论,分析了关键零件的应力可靠度、振幅可靠度及其动态与渐变灵敏度结果;基于相关失效性理论,得到了螺旋滚筒相关多失效模式可靠度及螺旋滚筒设计变量的可靠性灵敏度,建立改进遗传算法对螺旋滚筒进行可靠性优化设计。结果表明,滚筒综合可靠度由0.888 5提高到0.977 5。优化后的螺旋滚筒设计变量灵敏度绝对值均降低,综合可靠性得到提升。将刚柔耦合技术、可靠性灵敏度设计理论和相关失效性理论相结合,提出一种适用于含夹矸煤层的采煤机螺旋滚筒优化设计方法,为设计高效螺旋滚筒提供了一种有效途径。
The spiral drum is liable to failure when the shearer works in coal seam with gangue.To improve the reliability of the spiral drum,this study optimized its design based on the rigid-flexible coupling technology,reliability sensitivity design theory and dependent failure theory.Based on the coal breaking theory,the instantaneous load of the spiral drum was simulated numerically and a rigid-flexible coupling virtual prototype model of shearer was established,by which the indexes of the weak area,stress and vibration performance of the spiral drum were obtained.Combined with reliability sensitivity theory,the stress reliability,amplitude reliability and dynamic and gradient sensitivity results of key parts were analyzed.Based on the dependent failure theory,the reliability sensitivity of multiple failure modes related to the drum and the design variables of the drum were obtained.Based on improved genetic algorithm,the reliability optimization design of spiral drum was carried out.The results show that the comprehensive reliability of the spiral drum is increased from 0.888 5 to 0.977 5.With a reduction in all the absolute values of the sensitivity of the design variables,the optimized spiral drum is more robust and its comprehensive reliability is improved.The proposed optimal design method for shearer's spiral drum in coal seam with gangue provides an effective way to design efficient spiral drums.
作者
李明昊
郝哲
范佳艺
赵丽娟
乔捷
LI Minghao;HAO Zhe;FAN Jiayi;ZHAO Lijuan;QIAO Jie(School of Mechanical Engineering,Shenyang Ligong University,Shenyang 110159,China;School of Mechatronics Engineering,Shenyang Aerospace University,Shenyang 110136,China;College of Mechanical Engineering,Liaoning Technical University,Fuxin 123000,China;Liaoning Provincial Key Laboratory of Large-Scale Mining Equipment,Fuxin 123000,China)
出处
《山东科技大学学报（自然科学版）》
CAS
北大核心
2024年第1期119-126,共8页
Journal of Shandong University of Science and Technology(Natural Science)
基金
国家自然科学基金项目(51674134)
辽宁省教育厅青年科技人才育苗项目(LG202029)
辽宁省博士科研启动基金计划项目(2020-BS-153)
辽宁省教育厅基本科研项目(LJ2019JL024)。
关键词
含夹矸煤层
采煤机
螺旋滚筒
优化设计
遗传算法
coal seam with gangue
shearer
spiral drum
optimization design
genetic algorithm
