辊式磨粉机抽粉弯头磨损影响因素分析及优化  

Analysis and optimization of factors affecting the wear of powder extraction elbows in roller mills

作　　者：张芷豪 张政武[1,2] 陈力嘉 ZHANG Zhihao;ZHANG Zhengwu;CHEN Lijia(School of Mechanical Engineering,Shaanxi University of Technology,Hanzhong 723000,China;Shaanxi Key Laboratory of Industrial Automation,Hanzhong 723000,China)

机构地区：[1]陕西理工大学机械工程学院,陕西汉中723000 [2]陕西省工业自动化重点实验室,陕西汉中723000

出　　处：《陕西理工大学学报（自然科学版）》2024年第6期9-17,共9页Journal of Shaanxi University of Technology:Natural Science Edition

基　　金：陕西省重点研发计划项目(2017NY-148);陕西省教育厅服务地方专项计划项目(17JF007);陕南秦巴山区生物资源综合开发研究协同创新中心项目(QBXT-17-2);陕西理工大学研究生创新基金项目(SLGYCX1828)。

摘　　要：针对辊式磨粉机抽粉过程中面粉输送管道入口抽粉弯头的冲蚀磨损现象,通过多目标优化方法优化磨损影响因素,在保证管道内部流体具有良好流速的前提下,降低抽粉弯头的最大冲蚀率。运用计算流体力学方法,采用离散相模型研究气固两相流在弯头内部的流场分布情况,分析入口速度、面粉粒径、管道内径、弯径比和抽粉质量流量对流体流经弯头时,弯头最大冲蚀率和流体最大流速的影响规律及形成原因,得出最优取值区间。利用响应面试验得到各影响因素与最大冲蚀率和最大流速之间的拟合方程,以得出最大冲蚀率最小值和最大流速最大值为约束目标,联立求解两个拟合方程得出影响因素的最优值组合。通过计算流体力学模拟分析及优化仿真试验比较,得到优化后的最大冲蚀率降低了47%,最大流速降低了9%。In response to the erosion and wear phenomenon of the suction elbow at the inlet of the flour conveying pipeline during the powder extraction process of the roller mill,a multi-objective optimization method was used to optimize the influencing factors of wear,reducing the maximum erosion rate of the suction elbow while ensuring a good flow rate of fluid inside the pipeline.Using computational fluid dynamics methods and a discrete phase model,the flow field distribution of gas-solid two-phase flow inside the elbow is studied.The influence of inlet velocity,flour particle size,pipeline inner diameter,bending diameter ratio,and powder extraction mass flow rate on the maximum erosion rate and maximum flow velocity of the elbow when the fluid flows through the elbow are analyzed,and the formation reasons are determined.The optimal value range is obtained.Using response interviews to obtain fitting equations between each influencing factor and the maximum erosion rate and maximum flow velocity,with the goal of obtaining the minimum value of the maximum erosion rate and the maximum value of the maximum flow velocity as constraint objectives,jointly solving the two fitting equations to obtain the optimal combination of influencing factors.Through computational fluid dynamics simulation analysis,it was found that the optimized maximum erosion rate has decreased by 47%and the maximum flow rate has decreased by 9%.

关 键 词：抽粉弯头 计算流体力学 最大流速 最大冲蚀率 响应面优化 

分 类 号：TS211.3[轻工技术与工程—粮食、油脂及植物蛋白工程]