采煤机截割部行星架断裂原因分析与改进  

Analysis on reason of fracture and lmprovement for planetary mechanism of shearer cutting unit

作　　者：李庆亮[1] 贠瑞光[1] 宋振[1] 魏升[1] 

机构地区：[1]天地科技股份有限公司上海分公司,上海200030

出　　处：《煤炭科学技术》2016年第5期172-176,共5页Coal Science and Technology

摘　　要：针对MG200/446-WD型采煤机截割部行星架频繁断裂的现状,运用化学成分和机械性能检测、显微组织检测、有限元分析和实地考察等方法,分别从行星架材料、结构和使用环境3个方面进行分析。结果表明:MG200/446-WD型采煤机截割部行星架存在强度不足和应力集中的问题,需改进材料、工艺和结构;改进后的行星架强度提高了32%,所受最大应力减小至原来的58%;通过现场使用效果,验证了改进方案的正确性。该改进方法能有效提高行星架强度,可为薄煤层采煤机行星架的设计研究提供参考。According to status of the frequent fracture for planetary mechanism of cutting unit of MG200/446-WD type shearer,using the testing of chemical composition and mechanical properties,the testing of microscopic structure,and the finite element analysis and on-site inspection,analyzing from material,structure and use of the environment.The results showed that the planetary mechanism of MG200/446-WD type of shearer problems such as insufficient strength and stress concentration,should be improved from the materials,process and the structure design; the strength of planetary mechanism increased by 32% and maximum stress value decreases to 58% after improvement;using effect verify the validity of the improved scheme.The paper puts forward the improved method can effectively improve the strength of planetary mechanism.It can provide the reference for design and research of thin seam shearer planetary mechanism.

关 键 词：采煤机 截割部 行星架 断裂 强度 

分 类 号：TD421.6[矿业工程—矿山机电]