大采高采煤机新型摇臂壳体可靠性分析  

Reliability Analysis on New Ranging Arm of Large Mining Height Shearer

作　　者：赵丽娟[1] 马强[1] 刘鹏 

机构地区：[1]辽宁工程技术大学机械工程学院,阜新123000 [2]中传重型装备有限公司西安综采设备研究院,西安710000

出　　处：《系统仿真学报》2014年第7期1621-1626,共6页Journal of System Simulation

摘　　要：基于虚拟样机技术,借助Pro/E和ADAMS建立了以铸焊结合摇臂壳体为柔性件的大采高采煤机截割部刚-柔耦合模型。根据煤层赋存条件、滚筒及采煤机设计参数,运用Matlab软件模拟生成采煤机不同工况滚筒受力的载荷文件。通过ADAMS仿真分析,发现工况1下摇臂壳体输出端后侧高强钢板和靠近煤壁侧铸刚件轴承座处的应力均超过各自材料的许用应力,且变形较大,安全系数低;通过NSOFT疲劳寿命分析,发现壳体关键点疲劳寿命低,不能满足设计要求;优化后,相同工况下摇臂壳体输出端受力及其Z向变形明显改善,且抗震能力增强。同时高强钢板材料最小疲劳循环次数提高近96倍。分析结果对合理安排焊缝位置、优化焊接工艺及提高摇臂壳体工作的可靠性具有重要参考价值。Based on virtual prototype technology, a rigid-flex coupled virtual prototyping model of large mining height of shearer, which defined casting welding combination type of ranging arm as flexible parts, was built by means of Pro/E and ADAMS. According to the occurrence condition of coal seams and design parameters of drum and shearer, load files of drum under different conditions were obtained by using Matlab software. Through ADAMS dynamics simulation analysis under condition one, two locations whose stresses exceed their material allowable stresses were found. The two locations were the high strength plate of ranging arm output terminal’s rear side and the cast steel of bearing chock near the coal wall. And the deformation was large and the safety coefficient was low. Through NSOFT fatigue life prediction, the results show that the fatigue life of the key point was low and it could not meet the design requirements. Under the same condition, the force of ranging arm output terminal, the Z direction deformation and the seismic capacity of ranging arm were significantly improved after optimized. And the minimum fatigue cycle number of high strength plate was increased by about 96 times. The analysis results have important reference value on selecting welding seam position reasonably, optimizing welding process and improving working reliability of the ranging arm.

关 键 词：摇臂壳体 虚拟样机 可靠性 疲劳寿命 

分 类 号：TD421.63[矿业工程—矿山机电]