摘要
为了探究影响青贮机抛臂系统抛送效率等关键性因素,利用风速计测量抛臂内部风速,同时使用高速摄像机捕捉抛臂内不同位置物料颗粒速度,获得初始试验数据。利用CFD-EDEM耦合对抛臂系统抛送物料的物理运动过程进行仿真模拟,并将仿真结果与试验数据进行对标,以校准仿真输入参数。在此基础上,通过HyperStudy完成抛臂结构多物理场结构优化,分析不同抛臂结构下抛臂出口颗粒平均速度和进出口压差,获得更优的抛臂结构。仿真验证表明,优化后抛臂出口颗粒平均输出速度提高15.93%。优化后样机与原模型试验结果对比,物料颗粒抛送距离增加175%,减少抛臂结构的磨损,物料颗粒运动一致性也得到较大提高,满足青贮机抛臂出口物料速度高、散落范围小的设计要求。该方法为青贮收获机抛臂系统抛送效率多物理场耦合优化分析提供一种切实可行的技术路线。
To explore key factors affecting throwing efficiency of silage machine throwing arm system,anemometer was used to measure wind speed inside throwing arm,and a high-speed camera was used to capture velocity of material particles at different positions in throwing arm to obtain initial test data.CFD-EDEM coupling was used to simulate physical motion process of material thrown by throwing arm system,and simulation results were compared with test data to calibrate simulation input parameters.On this basis,multi-physical field structure optimization of throwing arm structure was completed by HyperStudy,and average velocity of particles at outlet of throwing arm and differential pressure between inlet and outlet of throwing arm were analyzed under different throwing arm structures,to obtain a better throwing arm structure.Simulation verification showed that average output speed of particles at optimized throwing arm outlet increased by 15.93%.Compared with test results of original model,optimized prototype increased material particle throwing distance by 175%.Throwing arm structure wear reduced,and material particle motion consistency has been greatly improved,to meet design requirements of high speed and small scattering range of silage machine throwing arm outlet.A feasible technical route was provided for multi-physical field coupling optimization analysis of silage machine throwing arm system throwing efficiency.
作者
宋有年
宋洪涛
崔震
郭继文
王乾勋
刘秀芝
田延芳
SONG Younian;SONG Hongtao;CUI Zhen;GUO Jiwen;WANG Qianxun;LIU Xiuzhi;TIAN Yanfang(Intelligence Integration&Numerical Innovation Co.,Ltd.,Shandong Wuzheng Group Co.,Ltd.,Rizhao Shandong 276800,China)
出处
《农业工程》
2025年第6期107-113,共7页
AGRICULTURAL ENGINEERING
关键词
离散元单元法
HyperStudy
计算流体力学
青贮收获机
抛臂
多物理场
结构优化
discrete element method
HyperStudy
computational fluid dynamics
silage harvester
throwing arm
multi-physical field
structural optimization
作者简介
宋有年,硕士,工程师,主要从事多物理场联合仿真研究,E-mail:syn6161@163.com。
