Through the discrete element simulation of the discharge process of the screw feeder,the flow law of particles in the silo during the discharge process of the equipment was analyzed,and the cloud map of particle position distribution,cloud map of velocity distribution,the change of discharge quantity in the spiral pipe and the distribution of screw wear at different times during the discharge process were obtained.The analysis shows that during the discharging process,the particles in the silo flow counterclockwise,and the narrow-band particle flow in the back wall area flows downward at a large speed and enters the head end of the spiral body.The upper area of the screw forms a horizontal material layer along the axis direction,and is discharged from the feeder forward by the rotation of the screw;The upper particle flow and the middle particles in the front wall area move slowly towards the back wall.There is particle backflow at the intersection of the front wall of the silo and the spiral body,and the backflow area gradually increases with time.The flow rate is stable during the whole discharging process,which indicates that the discharging amount has nothing to do with the particle flow in the silo.The wear of the spiral blade under the silo increases along the conveying direction,and the wear of the edge of the spiral blade is relatively large.This study can provide a theoretical basis for the structural performance optimization of the screw feeder.
关键词
螺旋给料机/离散元仿真/出料过程/颗粒流
Key words
belt conveyor/roller/finite element analysis/Ansys Workbench
维普
万方数据