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U形筒螺旋输送机输送颗粒物料的离散元仿真
引用本文:刘春飞,李艳洁,王玉,徐泳.U形筒螺旋输送机输送颗粒物料的离散元仿真[J].中国农业大学学报,2018,23(6):151-159.
作者姓名:刘春飞  李艳洁  王玉  徐泳
作者单位:北京林业大学工学院;中国农业大学理学院
基金项目: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。

关 键 词:螺旋输送机  颗粒  离散元法  仿真  U形筒
收稿时间:2017/7/24 0:00:00

Discrete element simulations on the transporting particle materials of U-shape screw conveyor
LIU Chunfei,LI Yanjie,WANG Yu and XU Yong.Discrete element simulations on the transporting particle materials of U-shape screw conveyor[J].Journal of China Agricultural University,2018,23(6):151-159.
Authors:LIU Chunfei  LI Yanjie  WANG Yu and XU Yong
Institution:School of Technology, Beijing Forestry University, Beijing 100083, China,School of Technology, Beijing Forestry University, Beijing 100083, China,School of Technology, Beijing Forestry University, Beijing 100083, China and College of Science, China Agricultural University, Beijing 100083, China
Abstract: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.
Keywords:screw conveyor  particle  discrete element method  numerical simulation  U-shape tube
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