激振力偏离质心的振动床面数值模拟与研究

Numerical simulation and research on vibrating bed with exciting force deviated from the centroid

为了研究直线激振力偏离质心时振动床面的工作状态,从动力学分析入手,建立了直线激振力偏离质心时振动床面的力学模型,计算了转动角;结合EDEM,模拟了激振力通过质心、质心前方和质心后方三种情况的振动给料过程,得出并分析了不同情况对应的物料质量流率和颗粒对床面的压力。结果表明:激振力通过质心前方时对比通过质心时,出料端振幅上升,物料运行速度整体加快,并且床面压力分布更均匀,对入料端压力减小,有利于振动给料过程和延长床面寿命,与激振力通过质心后方时的情况相反。

In order to study the working condition of vibrating bed when the linear exciting force deviates from the centroid,based on dynamic analysis,the mechanical model of the vibrating bed under the condition is established,and the rotation angle is calculated.EDEM is used to simulate the performance of the bed with the exciting force passing through the centroid,the front of the centroid,and the rear of the centroid.The mass flow rate of the material and the pressure of the particles on the bed are obtained and analyzed.The results show that when the exciting force passes through the front of the centroid,the amplitude at the discharge end of the vibrating bed rises,the particles flow faster.In addition,the pressure distribution on the bed is evener,and pressure on the feed end is reduced,which is beneficial to prolong the life of the bed;however,the results are opposite when the exciting force passes behind the centroid.Based on these,it is proposed that the linear exciting force passing through the front of centroid favors the vibration feeding process,which provides a basis for the optimal design of the vibration conveying equipment.