U形筒螺旋输送机输送颗粒物料的离散元仿真  

Discrete element simulations on the transporting particle materials of U-shape screw conveyor

作　　者：刘春飞 李艳洁[1] 王玉[1] 徐泳[2] LIU Chunfei1, LI Yanjie1, WANG Yu1, XU Yong2(1. School of Technology, Beijing Forestry University, Beijing 100083, China; 2. College of Science, China Agricultural University, Beijing 100083, Chin)

机构地区：[1]北京林业大学工学院,北京100083 [2]中国农业大学理学院,北京100083

出　　处：《中国农业大学学报》2018年第6期151-159,共9页Journal of China Agricultural University

基　　金：中央高校基本科研业务费专项资金资助(2016ZCQ08);国家自然科学基金项目(11202031)

摘　　要：采用试验与离散元模拟相结合的方法,对U形筒和圆形筒螺旋输送机输送颗粒物料的动态过程进行对比研究。结果表明:1)U形筒和圆形筒螺旋输送机输送颗粒时都存在质量累积波动现象,波动现象都随着螺旋叶片的转速、螺旋输送机的倾斜角度增加逐渐减弱;2)螺旋输送机的倾斜角度在0~45°时U形筒的效率大于圆形筒,当倾斜角度超过60°后圆形筒效率超过了U形筒,另外输送效率并非随螺旋叶片的转速增加线性增大,而是当转速增大到一定值后趋于稳定;3)对比U形筒和圆筒螺旋输送机工作时颗粒在所受挤压力,位于进料口处颗粒受力最大,且在进料口处圆筒螺旋输送机大于U形筒,转速增加颗粒受力趋稳。The dynamic process of conveying particles of U-shaped tube screw conveyor and circular tube screw conveyor was studied by the combination of experiment and discrete element method.The results showed that：1）There was mass accumulation fluctuation in the conveying of particles with U-shaped tube screw conveyor and circular tube screw conveyor,and the fluctuation gradually decreased with the increase of rotating speed and inclination angle;2）The efficiency of the U-shape tube was higher than round tube at 0-60°.However,the efficiency of the round tube exceeds the U-shape tube under the inclination angle was larger than 60°.Besides,the relationship between transport efficiency and rotational speed was no-linear,which remained stable after rotational speed exceeded an upper limit value;3）Particles at the feed hopper displayed larger compressive forces than those at other places,and the circular tube was larger than the U-shape tube in feed hopper,which increased the rotational speed and the particles compressive force tended to be stable.

关 键 词：螺旋输送机 颗粒 离散元法 仿真 U形筒 

分 类 号：O347.7[理学—固体力学] TU411[理学—力学]