甘蔗收获机除杂风机导风槽结构参数数值模拟优化OA
Numerical Simulation and Optimization of Guide Vane Structural Parameters in the Primary Extractor of a Sugarcane Harvester
除杂风机是切段式甘蔗收获机的关键部件,其性能直接影响整机的作业效率.以柳工S718A切段式甘蔗收获机的除杂风机为研究对象,通过风机试验、逆向建模和CFD数值模拟,建立了除杂风机的有限元模型.将一级导风槽数目(N1)、二级导风槽数目(N2)和轴向间距(L)作为主要因素,以风机出口最大风速v和全压效率η为指标,采用单因素分析和响应面法对导风槽的结构参数进行了优化.首先,采用单因素分析确定了当一级导风槽N1 为 4～6 个、二级导风槽N2为 6～8 个、轴向间距L为 30～50 mm时风机性能最优;其次,采用响应面模型求解最优的方法进一步得到最佳参数组合为:一级导风槽数目 4 个、二级导风槽数目 7 个、轴向间距 30 mm.数值模拟验证表明,优化后的风机相比原型风机,出口最大风速v提高了 8.84%,全压效率η提高了 8.39%,此时出口最大风速v=34.83 m/s、全压效率η=69.89%.验证试验结果表明:出口风速、流量和功率的仿真值与实测值误差均小于 10%,数值模拟方法具有较高的准确性.
The impurity removal fan was the key component of the segmented sugarcane harvester,and its performance di-rectly affected the working efficiency of the whole machine.Taking the impurity removal fan of Liugong S718A sugarcane harvester as the research object,the finite element model of the impurity removal fan was established by fan test,reverse modeling and CFD numerical simulation.The number of first-stage guide vanes(N1),the number of second-stage air guide groove(N2)and the axial spacing(L)were taken as the main factors,and the maximum at the outlet of the fan wind speed(v)and total pressure efficiency(η)were taken as the indexes.The structural parameters of the air duct were optimized by single factor analysis and response surface method.Firstly,the single factor analysis was used to deter-mine the optimal performance of the fan when the first-stage guide vanes(N1)was 4-6,the second-stage air guide groove(N2)was 6-8,and the axial spacing(L)was 30-50 mm.Subsequently,response surface analysis was employed to solve the optimal method,and the optimal parameter combination was further obtained:the number of primary air ducts was 4,the number of secondary air ducts was 7,and the axial spacing was 30 mm.The numerical simulation validation showed that the optimized extractor improved the maximum outlet wind speed(v)by 8.86%and the total pressure effi-ciency(η)by 8.39%compared to the original fan.The optimized maximum outlet wind speed(v)reached 34.85 m/s,and the total pressure efficiency(η)was 69.89%.The verification test results showed that the error between the simula-ted and measured values of outlet wind speed,flow rate and power were less than 10%,and the numerical simulation method had high accuracy.
Chen Xi;Pan Yingchun;Huang Xin;Chen Shaoke;Chen Shuwei;Li Yanzhou
College of Mechanical Engineering,Guangxi University,Nanning 530004,ChinaCollege of Mechanical Engineering,Guangxi University,Nanning 530004,ChinaCollege of Mechanical Engineering,Guangxi University,Nanning 530004,ChinaCollege of Mechanical Engineering,Guangxi University,Nanning 530004,ChinaCollege of Mechanical Engineering,Guangxi University,Nanning 530004,ChinaCollege of Mechanical Engineering,Guangxi University,Nanning 530004,China
农业科技
甘蔗收获机除杂风机导风槽结构优化单因素分析响应曲面法
sugarcane harvesterprimary extractorguide vanestructural optimizationsingle-factor analysisresponse surface methodology
《农机化研究》 2026 (4)
232-240,9
广西科技重大专项(桂科AA22117005)国家重点研发计划项目(2022YFD2301100)广西科技重大专项经费资助项目(桂科AA22117007)
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