螺旋输送机叶片母线DEM-FEM设计研究  

Study on DEM-FEM Design of Blade Generatrix of Screw Conveyor

作　　者：姚峰林 吕世宁 孟哲 杨浩 谢长开 YAO Fenglin;LYU Shining;MENG Zhe;YANG Hao;XIE Changkai(Institute of Logistics Engineering Equipment and Technology,Shanxi Provincial Key Laboratory of Intelligent Logistics Equipment,School of Mechanical Engineering,Taiyuan University of Science and Technology,Taiyuan,Shanxi 030024,China)

机构地区：[1]太原科技大学机械工程学院智能物流装备山西省重点实验室物流工程装备与技术研究所,山西太原030024

出　　处：《矿业研究与开发》2022年第1期175-180,共6页Mining Research and Development

基　　金：国家自然科学基金项目(52075356);山西省面上自然基金项目(201901D111236);山西省教学改革创新项目(J2021411);太原科技大学研究生优秀创新项目(XCX212054)。

摘　　要：针对垂直螺旋输送机在输送矿粉时,螺旋叶片母线函数设计缺乏理论依据的问题进行了研究。以输送效率、最大变形量、应力分布作为结构是否合理的评价标准。采用单质点理论对新型螺旋叶片进行了初步的设计,并且提出了一种基于颗粒孔隙率用于评估EDEM周期性模型精确度的算法。建立EDEM模型并对其进行了仿真计算,与单质点理论计算结果相比较,结果表明单质点理论仅能大致表现颗粒运动变化趋势,难以准确地反映实际运动变化状况;并对45%填充率、1200 r/min工况下的垂直螺旋输送机进行了DEM-FEM联合仿真分析,发现在垂直螺旋输送机中倾斜直母线型螺旋叶片最大应力载荷与最大变形量显著小于传统的水平直母线型螺旋叶片,为之后的垂直螺旋输送机的叶片结构设计提供参考。Aiming at the problem of lacking theoretical basis, the design of screw blade generatrix function of vertical screw conveyor was studied. Taking the conveying efficiency, the maximum deformation and stress distribution as the evaluation criteria for the rationality of the structure, the new screw blade was preliminarily designed by using the single particle theory, and an algorithm based on particle porosity was proposed to evaluate the accuracy of EDEM periodic model. The EDEM model was established and simulated. Comparing with the calculation results of the single particle theory, the results show that the single particle theory only roughly shows the trend of particle motion, and it is difficult to accurately reflect the actual motion changes. The DEM-FEM co-simulation analysis on the vertical screw conveyor under the condition of 45% filling rate and 1200 r/m was carried out. It is found that the maximum stress load and the maximum deformation of the inclined straight generatrix screw blade in the vertical screw conveyor are significantly smaller than those of the traditional horizontal straight generatrix screw blade. The study can provide a reference for the blade structure design of the vertical screw conveyor.

关 键 词：垂直螺旋输送机 单质点理论 DEM-FEM 颗粒群 

分 类 号：TD528[矿业工程—矿山机电] TH224[机械工程—机械制造及自动化]