基于Kriging模型的大型立式磨机选粉机结构优化设计研究  

Research on structural optimization design for powder separator of large vertical mill based on Kriging model

作　　者：李浩 王颖 马耀帅 孙春亚 黄荣杰 王昊琪 李琳利 LI Hao;WANG Ying;MA Yaoshuai;SUN Chunya;HUANG rongjie;WANG Haoqi;LI Linli(College of Mechanical and Electrical Engineering,Zhengzhou University of Light Industry,Zhengzhou 450002,China)

机构地区：[1]郑州轻工业大学机电工程学院,河南郑州450002

出　　处：《工程设计学报》2024年第6期801-809,共9页Chinese Journal of Engineering Design

基　　金：国家自然科学基金面上项目(52175256);河南省科技研发计划联合基金资助项目(225200810029);河南省科技攻关重点项目(242102221013)。

摘　　要：大型立式磨机是一个结构复杂、运行参数多、监控与操作点多、多物理场的粉磨系统,其性能与结构有直接关系。基于NX二次开发的参数化设计方法,建立了LGM型大型立式磨机的计算流体动力学-离散相模型(computational fluid dynamics-discrete phase model, CFD-DPM),实现对其选粉机格栅结构的分析与设计,探讨转子叶片结构对立磨机工作性能的影响;提出了基于Kriging模型的选粉机结构优化设计方法,并在Isight平台进行优化验证。结果显示,在参数设计范围内适当减小选粉机转子叶片的腰部长度和头部长度,增大其厚度和倾角,可以有效提高转子扭矩和转子叶片间气流速度,优化后扭矩增大了2.91%,流速提高了9.76%,证明了所提出方法的有效性。研究结果为立式磨机的结构设计与优化提供了新的理论依据和实践指导,具有较高的科研参考价值和工业应用前景。Large vertical mill is a grinding system with complex structure,multiple operating parameters,multiple monitoring and operating points,and multiple physical fields,and its performance is directly related to the structure.Based on the parametric design method of NX secondary development,CFD-DPM(computational fluid dynamics-discrete phase model)of LGM large vertical mill was established.The grating structure of the powder separator was analyzed and designed,and the influence of the rotor blade structure on the performance of the mill was discussed.A structure optimization design method for powder separator based on Kriging model was proposed and verified on Isight platform.The results showed that the rotor torque and the velocity of the airflow between rotor blades could be effectively improved by appropriately reducing the waist length and head length of the rotor blades and increasing their thickness and inclination angle within the parameter design range.The torque was increased by 2.91%and the flow rate by 9.76%after optimization,which proved the effectiveness of the proposed method.The research results provide a new theoretical basis and practical guidance for the structural design and optimization of vertical mill,and have high scientific research reference value and industrial application prospect.

关 键 词：立式磨机 选粉机 Kriging代理模型 优化设计 转子叶片 

分 类 号：TH162[机械工程—机械制造及自动化] TH65