容器结构对立式振动抛磨颗粒介质流动特性影响分析

Analysis of the influence of container structure on the flow characteristics of vertical vibration polishing granular media

为探究立式振动抛磨设备的容器结构对颗粒介质运动特性的影响,采用ADAMS-EDEM耦合仿真--振动抛磨工艺下的颗粒介质运动特性仿真。首先从颗粒运动轨迹与速度矢量角度分别分析容器结构对颗粒运动特性的影响,其次从深度方向与径向方向综合判断容器结构对颗粒速度与颗粒作用力的影响,最后通过动态力测试实验验证仿真的有效性。实验结果表明:岛状结构有助于颗粒的翻滚运动,阻碍了周向运动。有岛容器内颗粒运动更剧烈,颗粒平均作用力大于无岛。容器结构不会改变颗粒作用力在深度方向与径向方向分布的基本规律,但有岛容器内颗粒作用力在深度方向的增长尤为明显,2组实验均验证了仿真合理性。

In order to explore the impact of container structure on the motion characteristics of granular media in vertical vibrating grinding equipment,ADAMS-EDEM coupling simulation was used to simulate the motion characteristics of granular media during the vibrating polishing process.Firstly,the influence of container structure on particle motion characteristics is analyzed from the perspective of particle motion trajectory and velocity vector.Secondly,the influence of container structure on particle velocity and particle force is comprehensively judged from the depth direction and radial direction.Finally,the effectiveness of the simulation is verified through dynamic force test experiments.The experimental results show that the island-like structure aids the tumbling movement of particles but hinders circumferential movement.The movement of particles in the container with islands is more violent,and the average force of particles is greater than that of islands.The existence of the island structure does not change the basic law that the particle force gradually increases with depth,but it amplifies the force increase,particularly evident in the island container.However,the existence of the island structure basically does not change the trend of a gradual increase in particle force in the radial direction.The rationality of the simulation is verified by both sets of experiments.