Research On Fragmentation Characteristics And Cavity Optimization Of Cone Crusher Based On Discrete Element Method

Cone crusher is one of the key equipments in mine crushing equipment.It is mainly used in the middle and fine crushing stage of ore.With the continuous improvement of the production efficiency and quality requirements of crushed products,the performance requirements of cone crushers are becoming higher and higher.The common problems of the current mainstream hydraulic cone crusher are the short service life of the crushing chamber lining plate,the structural parameters of the cone crusher and the cavity type cannot be well matched,and the theoretical calculation of the productivity of commonly used crushers is not accurate.Therefore,this paper takes cone crusher as the research object,based on the rock crushing theory,performs kinematics and dynamics analysis on cone crusher,and improves the traditional productivity calculation method of cone crusher through the combination of theoretical calculation research and discrete element simulation verification The mathematical model of the dynamic fixed cone cavity curve was established,and the numerical simulation of MATLAB was used to make the cavity curve and the cone crusher structural parameters and performance parameters optimally match.The mechanical properties of the ore were measured in combination with experiments.The reliability of the design method is verified by EDEM discrete element simulation analysis.This article first analyzes and summarizes the classic crushing theory and modern crushing theory,and it also has kinematic and dynamic characteristics The analysis and research are carried out,and the calculation methods of inertia moment and inertia force of related eccentric components are summarized.Based on the two equilibrium states of the cone crusher,the conclusion that large inertia moment should be used to balance the inertia moment is obtained.Secondly,the three-dimensional modeling and analysis of the main structure of the cone crusher,such as the dynamic fixed cone,the transmission system and the main shaft structure,and the design and calculation methods of the relevant structural parameters are given.The performance parameters of thecone crusher are theoretically derived and calculated.Based on the movement state of the material in the crushing cavity,the calculation and derivation process of the most suitable swing speed of the moving cone is given,the amount of material in the plugging layer is calculated,the calculation method of the existing mathematical model of productivity is improved,and the moving cone and fixed cone are proposed.The mathematical model of the curve,and then in order to match the cavity shape with the best working parameters,an optimized mathematical model of the cavity structure parameters was established,and the optimized structure parameters were obtained through MATLAB solution.The final cavity type is determined with the optimized structural parameters,which provides a theoretical model basis for the next simulation verification.In the end,the modeling theory of granular ore material was explored and analyzed,and the discrete element simulation model of the granular iron ore material was established based on the physical and mechanical properties of the ore.Simulation analysis,including the impact of different technical parameters on the crushing quality.By analyzing the maximum unit crushing force before and after the optimization of the liner during material crushing,the maximum value before optimization reached about 160 Mpa,and the maximum value reached about 150 Mpa after optimization.The maximum compressive strength of the material iron ore used is about 148 Mpa,so it has been proved that the optimized cavity shape can effectively reduce the energy consumption of the crusher and effectively extend the service life of the crusher liner.By comparing and analyzing the product particle size curve before and after optimization,it can be known that the quality of the crushed product obtained by using the optimized cavity shape has been improved to a certain extent compared with that before optimization,which proves the reliability of the optimization design method.