基于离散元法回转清理筛运动参数对筛分过程的影响分析

The influence analysis of movement parameters of rotary cleaning screen on screening process based on discrete element method

以HZZD型回转清理筛为原形,建立了离散元仿真筛分模型,借助离散元分析软件EDEM,通过改变清理筛运动参数,分析影响物料平均推进速度和筛分效率的因素,以获得最佳运动参数。分析结果显示,对颗粒群平均推进速度的影响水平:筛体回转半径>转速>筛面倾角;为达到较好的筛分效果,筛体回转半径、转速和筛面倾角宜取为20 mm、450 r/min、6?~8?。

The HZZD rotary cleaning screen was used as the prototype to establish the simulation screening system model.To obtain the best motion parameters,the discrete element analysis software EDEM was used to analyze the factors affecting the average propelling speed of the particles and the screening efficiency by changing the parameters of the cleaning screen.The analysis results showed that the order of the influence of the factors on the average propelling speed of the particle group was:radius of gyration of the sieve>rotating speed>inclined angle of the sieve surface;To achieve a better screening effect,the radius of gyration should be taken as 20 mm,the rotating speed as 450 r/min and the inclined angle of the sieve surface as 6刟 to 8刟.