Optimum Vibration Angle for Transporting Granular Materials on Linear Conveyors
Optimum Vibration Angle for Transporting Granular Materials on Linear Conveyors
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DOI：
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发表时间：
2008-04
影响因子：
1.9
通讯作者：
J. Keraita
中科院分区：
文献类型：
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作者：
J. Keraita
振动输送机在工业上广泛应用于颗粒物料和产品的输送。研究了振动输送的理论点质量模型。计算结果与实验观测结果吻合较好。模型理论包括材料的静止、滑动和飞行状态。在确定运动方程时，分别考虑了每种状态。对于恢复系数，法向分量的值为0，切向分量的值为0.8，适合于模拟颗粒与传送面的碰撞。振动角度对运输方式和运输速度有较大影响。对于给定的一组条件，存在一个最佳振动角。最佳振动角减小，最佳振动角定义为摩擦系数增大。结果表明，存在最优的无量纲轨道加速度(投掷数)，这不支持一般的工业实践，即当进给周期变得不稳定和不稳定时，轨道加速度是有限的。
Vibratory conveyors are widely used in industry to transport granular materials and products. A theoretical point mass model for vibratory conveying was studied. The results agreed well with experimental observations. The model theory included the resting, sliding and flight states of the material. Each state was considered separately when determining the equations of motion. For the coefficients of restitution, values of zero for the normal component and 0.8 for the tangential component were found to be appropriate for modeling the collisions of the granular particles with the conveying surface. The vibration angle had a large influence on the mode and rate of transport. There was an optimum vibration angle for a given set of conditions. The optimum vibration angle decreased and was better defined as the coefficient of friction increased. The results suggest the existence of an optimum dimensionless track acceleration (throw number), which does not support general industrial practice in which the track acceleration is limited when the feed cycle becomes erratic and unstable.