垂直螺旋输送机输送特性及其参数优化研究  

Conveying characteristics and parameter optimization of vertical screw conveyor

作　　者：陈岁繁 张小猛 李其朋 沈策[2] 施永昌 CHEN Sui-fan;ZHANG Xiao-meng;LI Qi-peng;SHEN Ce;SHI Yong-chang(School of Mechanical and Energy Engineering,Zhejiang University of Science and Technology,Hangzhou 310023,China;Hangzhou Huaxin Mechanical and Electrical Engineering Co.,Ltd,Hangzhou 310012,China)

机构地区：[1]浙江科技学院机械与能源工程学院,浙江杭州310023 [2]杭州华新机电工程有限公司,浙江杭州310012

出　　处：《机电工程》2023年第5期746-756,共11页Journal of Mechanical & Electrical Engineering

基　　金：国家重点研发计划项目(SQ2020YFF0423771);浙江省科技计划项目(2022C04022)。

摘　　要：为了研究黏性物料(以潮湿的煤炭颗粒为例)在垂直螺旋输送机输送过程中的输送特性,以及以输送效率最大与叶片最大磨损深度最小的多目标优化问题,基于离散单元法(DEM)和非支配排序的遗传算法(NSGA-Ⅱ)的方法,研究了不同输送参数对螺旋输送特性的影响规律,并对垂直螺旋输送参数进行了优化。首先,基于DEM仿真研究了不同螺旋转速、螺距与间隙对垂直螺旋输送特性的影响;然后,对拟合后的回归模型进行了方差分析(ANOVA),并采用NSGA-Ⅱ算法对多目标模型进行了优化求解;最后,运用熵权法与灰色关联法对螺旋输送机进行了综合评价,确定了螺旋输送机的最佳输送参数。研究结果表明:煤炭平均质量流率随螺旋转速、螺距或者间隙的增加而增加,其影响程度顺序为:螺旋转速>螺距>间隙;叶片最大磨损深度随螺旋转速或者间隙的增加而增加,随螺距的增加而先减小后增加,其影响程度顺序为:螺旋转速>间隙>螺距;最佳垂直螺旋输送参数:螺旋转速n=360 r/min、螺距S=236.5 mm和间隙C=8.5 mm。以上研究成果可以为垂直螺旋输送特性的研究及设备优化提供一定的借鉴。In order to study the conveying characteristics of viscous materials(taking wet coal particles as an example)in the conveying process of vertical screw conveyor,and to solve the multi-objective optimization problem of maximizing conveying efficiency and minimizing blade wear depth,based on discrete element method(DEM)and non-dominated sorting genetic algorithm(NSGA-II),the influence law of different conveying parameters on screw conveying characteristics was studied,and the parameters of vertical spiral conveying were optimized.Firstly,the influence of different screw speed,pitch and clearance on the vertical screw conveying characteristics was studied based on the DEM simulation.Then,the fitted regression model was subjected to analysis of variance(ANOVA),and the multi-objective model was optimally solved using the NSGA-II algorithm.Finally,the entropy weight method and grey relational method were applied for comprehensive evaluation to determine the optimal conveying parameters.The research results indicate that the average mass flow rate of coal increases with the increase of screw speed,pitch,or clearance,and the influence order of:screw speed>pitch>clearance.The maximum wear depth of blade increases with the increase of screw speed or clearance,with the increase of the pitch shows the first decrease after the increase,and the influence order of:screw speed>clearance>pitch.The optimal vertical screw conveying parameters is that screw speed(n)is 360 r/min,pitch(S)is 236.5 mm,and clearance(C)is 8.5 mm.The above research results provide a certain reference for the study of vertical screw conveying characteristics and equipment optimization design.

关 键 词：运输机械 离散单元法 螺旋输送特性 非支配排序的遗传算法 熵权法 灰色关联法 

分 类 号：TH224[机械工程—机械制造及自动化] TP18[自动化与计算机技术—控制理论与控制工程]