Analysis and Improvement Design of Fracture Problem of Secondary Planetary Frame in the Cutting Section of Coal Mining Machine
Aiming at the fracture failure of the secondary planetary carrier in the drive system of the cut-off section of MG 1000/2500-WD drum coal miner of a coal enterprise,the analysis of the fracture problem is carried out,and the results show that the cause of the fracture problem is fatigue damage rather than overload.The improved design is completed by increasing the radius of the rounded comer of the backing groove of the secondary planetary carrier,and the analysis results show that the static strength has been improved to a certain extent,while the fatigue strength has been greatly improved,and the number of fatigue cycles has been increased by 21.8％.
coal mining machinecutting sectionsecondary planetary carriefi life analysisimproved design
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