基于EDEM的沥青混合料搅拌机叶片参数匹配  

Parameters Matching of Mixing Blades for Asphalt Mixture Mixer Based on EDEM

作　　者：赵利军[1] 申岩 邓欣 刘本学[2] 董武[1] 李耀[1] ZHAO Lijun;SHEN Yan;DENG Xin;LIU Benxue;DONG Wu;LI Yao(Key Laboratory of Highway Construction Technology and Equipment of Ministry of Education,Chang'an University,Xi'an 710064,China;School of Mechanical Engineering,Zhengzhou University,Zhengzhou 450001,China)

机构地区：[1]长安大学道路施工技术与装备教育部重点实验室,陕西西安710064 [2]郑州大学机械工程学院,河南郑州450001

出　　处：《郑州大学学报（工学版）》2019年第3期79-84,共6页Journal of Zhengzhou University（Engineering Science）

基　　金：国家自然科学基金项目(51705029);陕西省自然科学基础研究计划面上项目(2017JM5118)

摘　　要：为了提高搅拌均匀性,在普遍使用的双卧轴搅拌机上,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8 mm集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的合理匹配,并进行了试验验证.结果表明:所有叶片参数下搅拌的8 mm集料含量变异系数,都随着搅拌时间的延长而呈负幂函数递减;当给定目标均匀度的变异系数为0.1时,对所需搅拌时间显著性影响的强弱顺序依次是:单轴叶片总数量、单轴叶片布置、返回叶片数量和叶片安装角;各叶片参数的合理匹配关系是:满足拌缸长宽比小于1的单轴叶片总数量,单轴叶片对置,2对返回叶片,45°轴向安装角.In order to improve mixing uniformity of twin-shaft mixer,the EDEM software based on discrete element method was used to simulate the mixing process of asphalt mixture with different mixing blade parameters.The 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 8 mm-diameter aggregate content from different location in the same batch,The test verification was conducted.The results showed that the variation coefficient of 8mm-diameter aggregate content with different mixing parameters was decreased with increase of mixing time,and the relationship between them was a negative power function.When the variation coefficient of given uniformity was 0.1,the effect of total number of single shaft blades on mixing time required was the most significant,blade arrangement on the single shaft and number of reversing blade were the second,the shaft angle of blade was the least.The reasonable matching of these parameters were,the total number of single shaft blades that could meet the condition of the mixer′s length-width ratio less than 1,the blades arranged symmetrically on both sides of one shaft,the shaft angle is 45°,the reversing blade number is 2.

关 键 词：搅拌叶片 离散元仿真 沥青混合料 搅拌均匀性 双卧轴搅拌机 

分 类 号：U415.5[交通运输工程—道路与铁道工程]