Analysis of the influence of container structure on the flow characteristics of vertical vibration polishing granular media
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摘要: 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。Abstract: 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.
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Key words:
- vertical vibration /
- coupled simulation /
- dynamic force sensor /
- container
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图 1 立式振动抛磨设备示意图
1.容器；2.支撑；3.电机；4.弹簧；5底座
Figure 1. Vertical vibration polishing schematic diagram
图 6 2种容器内颗粒的速度矢量图
Figure 6. Vector plot of vertical velocity of particles inside two containers
图 7 2种容器对不同深度处颗粒速度的影响
Figure 7. Effect of two containers on particle velocity at different depths
图 8 两种容器对不同径向处颗粒速度的影响
Figure 8. Effect of two containers on particle velocity at different radial directions
图 9 2种容器对不同深度处颗粒作用力的影响
Figure 9. Effect of two types of containers on particle forces at different depths
图 10 2种容器对不同径向处颗粒作用力的影响
Figure 10. Effect of two types of containers on particle forces at different radial distances
图 13 不同方向下深度对颗粒作用力的影响
Figure 13. Effect of depth on particle force in different directions
图 14 不同方向下径向距离对颗粒作用力的影响
Figure 14. Effect of radial distance on particle force in different directions
表 1 Vibra King 150SX设备参数
Table 1. Parameters of the Vibra King 150SX
名称 参数 电机转速 /(r·min−1) 3 000 容器质量/kg 3.7 容器容积/L 0.43 偏心块质量/kg 0.2 
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材料参数 密度ρ
/(kg·m−3)泊松比 剪切模量E
/Pa容器 2675 0.28 1.24×1011 滚抛磨块 1150 0.21 3.2×109
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相互作用 碰撞恢复
系数静摩擦
系数滚动摩擦
系数滚抛磨块-滚抛磨块 0.75 0.30 0.03 滚抛磨块-容器 0.36 0.26 0.15
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表 4 采样点坐标
Table 4. Coordinate of sampling points
轴 1 2 3 4 5 6 X 54 75 96 117 54 75 Z 90 90 90 90 75 75 轴 7 8 9 10 11 12 X 96 117 54 75 96 117 Z 75 75 60 60 60 60
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表 5 采样点方位符号定义
Table 5. Symbol definition of direction of sampling points
方位 方位符号定义 1 背对径向颗粒流方向 2 正对周向颗粒流方向 3 正对径向颗粒流方向 4 背对周向颗粒流方向
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