基于MBD-DEM耦合的新型二级摆振动筛筛分性能研究

Research on screening performance of a new double pendulum vibrating screen based on MBD-DEM coupling

为提高振动筛的筛分效率,采用DEM和MBD的双向耦合仿真方法,建立含有二级动摆的新型振动筛运动与骨料颗粒的耦合模型,对二级摆新型振动筛的运动过程进行数值模拟,研究了筛面倾角、振动频率、振幅对筛分性能的影响,通过正交试验和响应面分析法分析了影响参数,并与去掉二级动摆的原振动筛进行比较。结果表明:对新型二级摆振动筛筛分效率的影响大小依次为筛面倾角、振幅、振动频率;最优参数组合为振动幅度10 mm、振动频率15 Hz及筛面倾角17°。

In order to improve the screening efficiency of vibrating screen,the bidirectional coupling simulation method of DEM and MBD was used to establish a coupling model of a new vibrating screen motion with the double pendulum and aggregate particles.Then,the motion process of the new vibrating screen with the double pendulum was numerically simulated,and the influence of inclination angle,vibration frequency and amplitude on screening performance of the screen surface was studied as well.At the same time,the influencing parameters were analyzed by orthogonal experiment and response surface methodology,and compared them with the original vibrating screen without the double pendulum.The results showed that the influence of the parameters on the screening eficiency of the new double pendulum vibrating screen was in order of the inclination angle,vibration amplitude,and vibration frequency of the screen surface,and the optimal parameter combination was vibration amplitude of 10 mm,vibration frequency of 15 Hz and screen surface inclination angle of 17°.