Research On Structure Optimization Of Plow Discharger Of Belt Conveyor Based On DEM

The conveying equipment for bulk materials is widely used in coal mines,ports,power generation,and other industries.Belt conveying equipment is the key equipment of the coal mine conveying system.The plow discharger,which is the middle unloading link of the belt conveyor,plays a pivotal role.In the production process,higher requirements are also placed on the performance of the middle discharge.In this paper,the discrete element method is used to take a certain type of belt conveyor as the research object,and the main problems of the plow discharger,such as blocking,spreading,dust pollution,and serious wear,are solved through structural optimization.The main research contents are divided into the following parts:(1)Using EDEM simulation to analyze the force law and wear characteristics of the guide plate of the plow discharger under the working conditions of different belt speeds and different particle sizes,and analyze and compare the force and wear conditions of the guide plates of different shapes.According to the simulation data,the force and wear of the curved guide plate are the smallest.(2)According to the traditional plow discharger guide plate structure,the optimization scheme of the curved guide plate is proposed,and the discrete element model of the simulation structure is established.When the guide plate of the plow discharger adopts a different guide plate including angles,curved surface radian,and curved surface radius,the speed of the material at the discharge port along the discharge direction,the speed along the conveying direction,and the quality of the material change.(3)Through the calculation and comparison of range analysis,variance analysis,and matrix analysis,it can be concluded that the order of the influence of each factor on the discharge efficiency index value is:guide plate angle>surface radius>surface radian;the relatively optimal structural combination is The included angle of the guide plate is 100°,the curvature of the guide plate surface is 130°,and the radius of the guide plate surface is 260mm.(4)By adding UHMW-PE ultra-high polymer material as the wear-resistant layer of the plow discharger.Perform EDEM unloading simulation.Comparison of discharge performance indexes and wear resistance indexes before and after adding UHMW-PE ultra-high polymer material.It is concluded that UHMW-PE ultra-high polymer material can effectively improve the discharge performance while improving the wear resistance of the plow discharger.Finally,the proposed curved guide plate is compared with the traditional structure before optimization for unloading simulation data.The optimized structure is better than the traditional structure before optimization in discharge performance index and wears resistance index,serious wear and other problems have been effectively improved,and the feasibility of the optimization scheme proposed in this paper is confirmed.It has certain reference significance for the design of the plowshare structure of the plow discharger.