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| Analysis of the shearer´s rocker arm shell based on the multi-field coupling |
| ZHAO Li-juan，LI Minghao |
| College of Mechanical Engineering， Liaoning Technical University， Fuxin 123000， China |
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Abstract In order to do innovative design for shell type parts on large mechanical equipment, a flexible virtual prototype coupling model of large mining height shearer´s rock arm shell made by casting, forging and welding technology was built to study the thermal equilibrium procedure of the gear system in the shearer´s cutting part. The temperature load and boundary conditions were determined and the dynamic load files which were output by MSC. ADAMS were loaded. Temperaturestructure coupling analysis of shearer´s rock arm shell studied by ANSYS, and then based on the coupling results the fatigue life prediction was researched by ANSYS. The temperature field nephogram and the structure coupling analysis nephogram of the shearer´s rocker arm shell were obtained to find the fatigue life´s weak links of the shearer´s rocker arm shell and put forward the improvement measures to increase the stiffness, strength, fatigue cycles and safety factor. The research results showed that the influence of the temperature field made the maximum stress which was on the rocker arm shell increased by 11.707%. The research results provide a unequivocal quantitative basis for the design and optimization of the mechanical equipment´s large shell type parts which could improve this type of parts´ functional reliability effectively．
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Published: 28 June 2014
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基于多场耦合的采煤机摇臂壳体分析
为对大型装备壳体类零件进行创新设计，建立了大采高采煤机铸、锻、焊结合摇臂壳体的柔性虚拟样机耦合模型，研究截割部齿轮系统热平衡过程，确定温度载荷和边界条件，加载动力学仿真软件ADAMS输出的载荷文件．应用有限元软件ANSYS对摇臂壳体进行温度结构耦合分析及疲劳寿命预测，得到了壳体的温度场及结构场云图，发现了摇臂壳体疲劳寿命的薄弱环节，并提出了改进措施．结果表明，温度场的影响使摇臂壳体的最大应力增加了11.707%.研究结果为大型壳体类零件的设计与优化提供了明确的量化依据，可有效提高该类零件的工作可靠性．
关键词：
采煤机,
摇臂壳体,
温度场,
多场耦合,
疲劳寿命
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