[1]赵利军,申岩,邓欣,等.基于EDEM的沥青混合料搅拌机叶片参数匹配[J].郑州大学学报(工学版),2019,40(03):15.
 Parameters Matching of Mixing Blades for Asphalt Mixture Mixer Based on EDEM[J].Journal of Zhengzhou University (Engineering Science),2019,40(03):15.
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基于EDEM的沥青混合料搅拌机叶片参数匹配()
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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:
40
期数:
2019年03期
页码:
15
栏目:
出版日期:
2019-04-30

文章信息/Info

Title:
Parameters Matching of Mixing Blades for Asphalt Mixture Mixer Based on EDEM
作者:
赵利军申岩邓欣刘本学董武李耀
文献标志码:
A
摘要:
为了提高沥青混合料的搅拌均匀性,采用离散元EDEM软件模拟了不同搅拌叶片参数下的沥青混合料搅拌过程,通过对同一批次混合料中不同位置的粉料含量变异系数达到目标均匀度所需搅拌时间的正交分析,得到了单轴叶片总数量、单轴叶片布置、叶片轴向安装角和返回叶片数量对搅拌均匀性的影响规律和匹配关系,并进行了试验验证.结果表明:随着搅拌时间的延长,所有叶片参数下搅拌的粉料含量变异系数都下降,并呈负幂函数关系;对于粉料含量变异系数达到0.06的目标均匀度,不同叶片参数所需要的搅拌时间约为25~35s,搅拌时间最大相差30%;单轴叶片总数量对搅拌均匀性的影响最显著,单轴叶片布置和叶片安装角次之,返回叶片数量的影响最小;在搅拌机容量和叶片几何尺寸不变的条件下,通过减少单轴叶片总数量,使拌缸长宽比控制在1以内,对改善搅拌均匀性的效果最显著,同时与之相匹配的其它参数为:叶片对置,轴向安装角45°,返回叶片数量2对;尽可能地加快混合料在机内大范围循环运动的强度和频次,是合理选择与匹配叶片参数的主要依据.
Abstract:
In order to improve mixing uniformity of asphalt mixture, the EDEM software based on discrete element method was used to simulate the mixing process of asphalt mixture with different mixing blade parameters. The influence on mixing uniformity and matching relationship of total number of single shaft blades, blade arrangement on single shaft, shaft angle of the blade and the number of reversing blade were determined by orthogonal analysis of the mixing time required to reach given uniformity of variation coefficient of filler content from different location in the same batch, and test verification was conducted. The results show that the variation coefficient of filler content with different mixing parameters was decreased with increase of mixing time, and the relationship between them is a negative power function. For the given uniformity of variation coefficient of filler content of 0.06, mixing time of different mixing blade parameters is about 25~35s, the maximum difference is 30%. The effect of total number of single shaft blades on mixing uniformity is the most significant, blade arrangement on the single shaft and shaft angle of the blade are the second, the number of reversing blade is the least. Under the same conditions of the capacity of mixer and blade geometrical size, the effect of improving mixing uniformity is the most remarkable by reducing the total number of single shaft blades and consequently, the length-width ratio of the mixer will be within 1. And on this basis, the other blade parameters are matched: the blades are arranged symmetrically on both sides of one shaft, the shaft angle is 45°, the number of reversing blade is 2. As far as possible to speed up the intensity and frequency of materials circular motion in mixer is the main basis for selecting and matching parameters of the mixing blade.
更新日期/Last Update: 2019-04-16