低位放顶煤反四连杆过渡支架关键部件设计研究  

Key components design for low position top coal anti-four-link transition support

作　　者：巩德华 贾晖 厉功卓 王军辉 曹连民[1] GONG De-hua;JIA Hui;LI Gong-zhuo;WANG Jun-hui;CAO Lian-min(Shandong University of Science and Technology,Qingdao 266590,China)

机构地区：[1]山东科技大学机械电子工程学院,山东青岛266590

出　　处：《煤炭工程》2021年第5期177-181,共5页Coal Engineering

摘　　要：针对正四连杆放顶煤过渡支架极易出现前后排立柱受力不均衡以及放顶煤过渡支架在冲击载荷的作用下易导致主要承载结构疲劳性失稳破坏的问题,以反四连杆放顶煤过渡支架的主体结构件顶梁和底座为研究对象,运用SolidWorks建立顶梁和底座的三维模型,利用ANSYS Workbench有限元软件对零部件进行疲劳寿命分析。基于对顶梁与底座的耐用性以及损伤图等数据的研究,获得了顶梁和底座的疲劳累计损伤最大值和易发生疲劳破坏的部位。研究结果表明,设计的顶梁和底座在载荷作用下变形量较小,顶梁和底座的疲劳累积损伤最大比值均小于1,满足过渡支架各部分结构设计寿命小于可用寿命的要求。The front four-bar caving coal transition support is prone to uneven load on the front and rear columns and the caving coal transition support is likely to cause fatigue instability and failure of the main bearing structure under the impact load.Taking the top beam and base of the main structural parts of the anti-four-link caving coal transition support as the research object,the 3 D model of the top beam and base was established using SolidWorks,and the fatigue life analysis of the components was performed using the ANSYS Workbench finite element software.By analyzing the life cloud diagram,damage cloud diagram and fatigue sensitivity characteristic curve of the top beam and base,the maximum cumulative fatigue damage of the top beam and base and the parts prone to fatigue failure are obtained.The results show that the designed top beam and base deforms slightly under load,and the maximum fatigue cumulative damage ratio of the top beam and base is less than 1,indicating the structural design life of each part of the transition support is shorter than the usable life,which meets the requirement.

关 键 词：冲击载荷 支架底座 疲劳寿命分析 

分 类 号：TD355.4[矿业工程—矿井建设]