瓢型摆振槽颗粒偏析效果的离散元模拟

Discrete element simulation of particle layering behavior under combination vibration in scoop shimmy groove

为了强化瓢型摆振槽在摆振时物料颗粒的偏析效果,以三维离散元法为手段,选用塑料球和钢球的二元干颗粒,依次对光槽时单独摆振、光槽时组合摆振、添加凸起槽时组合摆振3种情况颗粒偏析过程进行离散元模拟研究,并以颗粒体积分数为评判标准,且结合模拟偏析云图,进行颗粒偏析效果评价。结果表明:组合摆振强于单独摆振的偏析效果;添加凸起槽强于光槽分层效果;相较于光槽时单独摆振,添加凸起槽时组合摆振时颗粒的偏析程度可提高10%~15%。

To explore the layering behavior of material particles when swinging vibration, the method of three-dimensional discrete element wsa used to simulation the layering process of plastic balls and steel balls under single pendulum on light groove, combined swing on light groove and combined swing on adding embossment groove. The particle segregation effect was evaluated with the particle volume concentration as the evaluation criterion. The results indicate that the layered effect of combined swing vibration is better than that of single swing vibration, the layered effect of adding convex groove is better than that of the light groove. And volume concentration of plastic ball particles for the adding convex groove can be