筛片参数优化对饲料粉碎机筛分效率的影响

传统锤片式粉碎机普遍存在着筛分效率低于粉碎效率的问题,为了寻求提高粉碎机的筛分效率的途径,该文通过试验台试验与颗粒动力学仿真相结合的方法,通过研究粉碎机筛片的结构参数和分离装置内的气流速度对筛分效率之间的影响规律,揭示物料的透筛机理。通过试验台试验发现：随着气流速度的增大,筛分效率呈先高后低的趋势;筛孔形状和筛片安装角度对筛分效率的影响较大;筛孔的排列方式对筛分效率的影响较小。利用颗粒动力学仿真软件EDEM-FLUENT对颗粒筛分过程进行模拟仿真,模拟结果与试验结果基本吻合,二者的相对误差不超过4%,结果显示：气流速度为6~15 m/s时,物料透筛效率呈先逐渐增大后又逐渐降低的趋势;筛片安装角...

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Bibliographic Details
Published in农业工程学报 Vol. 32; no. 22; pp. 284 - 288
Main Author 曹丽英 张跃鹏 张玉宝 李燕燕
Format Journal Article
LanguageChinese
Published 内蒙古科技大学机械工程学院,包头,014010 2016
Subjects
优化
农业机械
加工
筛分效率
筛孔形状
筛片安装角度
锤片式粉碎机
agricultural machinery
hammer mill
加工
锤片式粉碎机
screen installation angle
screen hole shape
optimization
screening efficiency
优化
筛片安装角度
筛孔形状
筛分效率
processing
农业机械
Online AccessGet full text
ISSN1002-6819
DOI10.11975/j.issn.1002-6819.2016.22.039

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Summary:传统锤片式粉碎机普遍存在着筛分效率低于粉碎效率的问题,为了寻求提高粉碎机的筛分效率的途径,该文通过试验台试验与颗粒动力学仿真相结合的方法,通过研究粉碎机筛片的结构参数和分离装置内的气流速度对筛分效率之间的影响规律,揭示物料的透筛机理。通过试验台试验发现：随着气流速度的增大,筛分效率呈先高后低的趋势;筛孔形状和筛片安装角度对筛分效率的影响较大;筛孔的排列方式对筛分效率的影响较小。利用颗粒动力学仿真软件EDEM-FLUENT对颗粒筛分过程进行模拟仿真,模拟结果与试验结果基本吻合,二者的相对误差不超过4%,结果显示：气流速度为6~15 m/s时,物料透筛效率呈先逐渐增大后又逐渐降低的趋势;筛片安装角度在20~70°范围内,最佳筛片安装角度为35~45°;在筛片开孔率相同的情况下,长方孔的筛分效率最高,圆孔的筛分效率最低。研究认为：在多种组合中,气流速度为12.37 m/s,筛片安装角度为40°的长方形的T型筛孔的筛分效率最高。
Bibliography:Cao Liying, Zhang Yuepeng, Zhang Yubao, Li Yanyan （Mechanical Engineering School, Inner Mongolia Science ＆ Technology University, Bao tou 01401 O, China）
11-2047/S
Traditional hammer mill generally has the problem that the screening efficiency is lower than the grinding efficiency. In order to improve the screen efficiency of the hammer mill, based on the combination of experiment and numerical simulation method, the influence of the structure parameters of the hammer mill screen and the air flow velocity in the separation device on the screening efficiency was studied, the mechanism of screening was revealed, and the way to improve the screening efficiency of the crusher was explored. According to a type of hammer mill designed by research group, we designed a screening test bench to simulate the air flow field in the separation device of the hammer mill using a blower as the air flow source. In this experiment, 5 kinds of particle sizes through screen were selected, and the influences of 4 factors including t
ISSN:1002-6819
DOI:10.11975/j.issn.1002-6819.2016.22.039