Optimization Design Of Hopper Structure Of Heap Reclaimer Based On Bulk Mechanics

Bucket wheel stacker reclaimer is a kind of high efficiency continuous mining bulk loading and unloading equipment that can complete the work of taking,transporting,mixing and discharging the medium material,and is widely used in large industrial production,such as steel mills,wharves,power plants,earthworks,etc.Central hopper as the core hub of heap reclaimer,its structure not also directly affect the dispersing and discharging of the material.But also have an unreasonable impact on the follow-up belt machine and its related mechanical structure.Therefore,it is necessary to make detailed and accurate calculation of the central hopper stacker reclaiming condition,in order to provide useful data for improving the structure of the central hopper.The thesis is mainly studied in the following aspects:1.The contact model,particle simplified model and particle motion equation are established according to the bulk mechanics.The simulation parameter setting is according to the parameters of the stacker.At the same time,the corresponding data evaluation index is used to analyze the simulation results.It lays the foundation for the numerical simulation of the bulk material reloading process with the help of the software EDEM.The numerical analysis of the existing structure has been carried out to verify the accuracy of the simulation results.Meanwhile.It provides some theoretical guidance for the optimization design below.2.The software EDEM is used to determine the effect of the geometric parameters of the hopper on the motion of the particles and the force of the hopper.The paper optimize the hopper by the optimal geometric parameters of the feed section and the discharging section based on the conclusions.3.Comparing the changes of particle,the stress of hopper and the force of the ground conveyor belt before and after optimization,the results show that the performance of the new center hopper has greater improvement than the original structure.The maximum velocity of particles in the hopper is reduced from 13.8m/s to 10.8m/s.The structure of the maximum force is reduced from 15800 N to 12000 N,the force of structure is more gentle,it is mainly distributed in 3000N~7000N.The ground conveyor belt force reduce,the maximum impact force is reduced from 21000 N to 6200 N,the stress is mainly distributed in 2500N~4500N.Under the working condition 2 and the working condition 3,the mass ratio of the granular material to the left and right sides of the ground conveyer belt changed from 0.3 to 0.9.4.Based on the theory of EDEM-ANSYS Workbench coupling,the key parts of the new central hopper structure are analyzed and studied,the stress and deformation distribution of the hopper are obtained,which provide a theoretical reference for the vibration and noise reduction and lightweight design of the stacker reclaimer.Some suggestions are proposed for the new type of central hopper making,it has a certain reference value for the design and implementation of the following processing technology of the hopper.