Fatigue Life Analysis and Structural Optimization of Planetary Racks for Mining Coal Machines
Taking the planetary frame structure of the cut-off section of MG1000/2500-WD coal mining machine as the research object,a finite element model for fatigue life analysis was constructed using SolidWorks and ANSYS software.It is found that the fatigue life of the local positions of the first and second level planetary carriers is relatively short,and there is room for optimization and improvement.For the two levels of planetary carriers,six structural parameters were taken as the optimization objects,and the optimization study made the minimum fatigue cycle times of the first and second level planetary carriers improved by 30.97％and 41.23％,respectively.The structurally improved planetary carrier is deployed to the coal mining machine engineering practice,and after 8 months of field application,it is found to have achieved the expected effect,which can create good conditions for the improvement of the efficiency of coal mining and create greater economic benefits for the enterprise.
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