Research on Optimal Matching of Large Load Coal Flow Unloading Machine Head Based on Dynamic Discrete Element Method
In response to issues such as coal retraction,low efficiency and high energy consumption during the unloading process of the cross side dumping scraper conveyor under current high load conditions,this article comprehensively considers factors such as coal flow velocity,coal flow quality and structural wear.Based on the dynamic discrete element method,an optimal matching strategy for the linear structure of the unloading machine head components suitable for heavy load conditions is proposed.The coal flow mechanism of the cross side dumping scraper conveyor is studied.The multi-structure combination optimization scheme of the unloading machine head plow coal plate bending plate,bottom plate and the S movable middle plate is analyzed.A database of characteristic information of heavy load materials is built,and a dynamic discrete element analysis model for the coal unloading efficiency of the scraper conveyor is proposed.The experimental results show that:(1)under the same unloading port monitoring position and volume state,the optimization design of the curvature radius R of the bending plate,the coal entry angle αand the coordination relation between the key design coordinate points of the bottom plate can effectively improve the average flow speed of materials at the unloading port;(2)the proposed optimal matching strategy for the structure of the unloading machine head effectively improves the unloading efficiency by 9.4％,which has important guiding significance for improving the unloading efficiency of the scraper conveyor head.
side discharge scraper conveyordiscrete elementcoal unloading efficiencyoptimal matching
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