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《Coal Mine Machinery》 2017-11
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Innovative Design for Ranging Arm of Large Mining Height of Shearer

MA Qiang;Taiyuan Research Institute Co., Ltd., China Coal Technology and Engineering Group;  
Traditional ranging arm of large mining height of shearer has large size、long casting cycle and complex process. Based on an innovative design,the casting welding(cast and high strength plate)combination type of ranging arm was developed. The simulation analysis under actual operating conditions found that the stresses of weld of stiffening ring of ranging arm and the cover hole of left idler shaft were large and exceed their material allowable stresses. The deformation of output was large and fatigue life of ranging arm was short; After structure optimized,two weaknesses' s stresses respectively decreased 99.907 MPa and 7.676 MPa,the displacement of INT_Node11 Y direction falled0.022 7 mm. Optimizing effect was obvious and reliability was improved significantly.
【CateGory Index】: TD421.6
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