刘 龙1， 高爱民1， 程志新2， 刘风军2， 王红松1， 任 伟1， 王昌德1
（1. 甘肃农业大学 机电工程学院， 甘肃 兰州 730070；2. 酒泉市铸陇机械制造有限责任公司， 甘肃 酒泉 735000）
DOI:10.13732/j.issn.1008-5548.2023.01.010
收稿日期： 2022-06-21，修回日期：2022-11-02，在线出版时间：2022-12-01 16:28。
基金项目： 甘肃省自然科学基金项目，编号：21JR7RA817；甘肃省教育厅产业支撑计划项目，编号：2021CYZC-39。
第一作者简介： 刘龙(1998—)，男，硕士研究生，研究方向为农业工程技术与装备。E-mail： 872529933@qq.com。
通信作者简介： 高爱民(1981—)，男，副教授，博士，硕士生导师，研究方向为农业工程技术与装备。E-mail： gaoaimin@gsau.edu.cn。
摘要：为提高制粒效率，对秸秆的本征参数进行测定，利用离散元软件EDEM和有限元软件ANSYS对制粒过程进行仿真，研究颗粒的速度和所受外力随时间的变化规律，以及颗粒接触数量随时间的变化情况；分析模孔孔径、模孔锥角和颗粒粒径对制粒效果的影响，优化环模结构参数。结果表明：模拟仿真的制粒过程与实际制粒机的颗粒成型过程基本一致，颗粒的速度和所受外力呈现出周期性的波动状态，颗粒的接触数量呈现周期性的、逐渐减小的趋势，秸秆制粒过程表现为周期性的循环挤压过程；当环模孔径为5 mm、模孔锥角为75°、粉料粒径为0.6 mm时，环模表面的磨损变形较轻微，制粒质量和制粒效率最佳。
关键词：秸秆；制粒过程；环模结构；参数优化；仿真模拟
Abstract：In order to improve granulating efficiency, the intrinsic parameters of straw were measured and the granulating process was simulated by using discrete element software EDEM and finite element software ANSYS. The changes of external force number with time, as well as the changes of particle contact number with time were studied. The influence of die hole aperture, die hole cone angle and powder particle size on the granulating effects were analyzed and the structural parameters of ring die were optimized. The results show that simulated granulation process is basically the same as the actual granulation process. The particle velocity and external force show a periodic fluctuation state. The particle contact number has a periodic and gradually decreasing trend. The straw granulating process is a periodic cyclic extrusion process. When the die hole aperture is 5 mm, the die hole cone angle is 75° and the powder particle size is 0.6 mm, the wear deformation of ring die surface is slight and the granulation quality and efficiency are the best.
Keywords：straw; granulating process; ring die structure; parameter optimization; simulation
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