料斗速度与振动对布料均匀性的影响仿真研究

Simulation Study on the Effects of Hopper Speed and Vibration on Powder Spreading Uniformity

摘要: 利用离散元仿真软件EDEM对混合粉末布料过程进行仿真，探究料斗布料工艺参数(料斗行进速率、料斗振动频率和振幅)对混合粉末布料均匀性的影响规律。结果表明：随着行进速度的提高，料斗内粉料质量流率增大，但单位距离的布料质量降低。添加料斗振动有利于粉料的下落流动，并且随着振动频率和振幅的提高，料斗内粉料下料速度增加，但布料均匀性降低。在实际生产中应合理设置料斗运行速度及振动相关参数，以确保粉料充粉下落和粉料均匀性。

Abstract: The discrete element method software EDEM was employed to simulate the spreading process of mixed powders, and the effects of hopper spreading process parameters, including traverse speed, vibration frequency and vibration amplitude, on the uniformity of the mixed powders were investigated. The results show that the mass flow rate of powder in the hopper increases with increasing traverse speed, whereas the mass of powder spread per unit distance decreases. The application of hopper vibration facilitates the downward discharge of powder; moreover, with increasing vibration frequency and amplitude, the powder discharge rate in the hopper increases, but the spreading uniformity deteriorates. Therefore, the hopper traverse speed and vibration-related parameters should be set reasonably in practical production to ensure smooth powder discharge and satisfactory powder uniformity.