风送式喷雾机叶轮设计及参数的多目标正交化分析  

Impeller design and its parameters multi-objective orthogonalization analysis of air-blast sprayer

作　　者：龚曙光[1] 徐珊 卢海山 宋青卓 刘黎明 GONG Shuguang;XU Shan;LU Haishan;SONG Qingzhuo;LIU Liming(School of Mechanical Engineering,Xiangtan University,Xiangtan 411105,China;Hunan Jiujiu Intelligent Environmental Protection Co.Ltd.,Changsha 410205,China)

机构地区：[1]湘潭大学机械工程学院,湖南湘潭411105 [2]湖南九九智能环保股份有限公司,湖南长沙410205

出　　处：《湘潭大学学报（自然科学版）》2022年第6期12-22,共11页Journal of Xiangtan University(Natural Science Edition)

基　　金：湖南省高新技术产业科技创新引领计划(2020GK4101)。

摘　　要：为提高风送式轴流喷雾机的有效射程和效率,建立了风送式喷雾机内外流场的仿真模型并进行了实验验证,采用接近平底的LS翼型作为叶轮的叶片翼型,提出了叶轮设计及其三维建模的方法;将两叶轮设置为对旋方式,选取有效射程和全压效率作为优化目标,采用极差分析法对叶轮轮毂比、叶片安装角之差、后级叶片数3个叶轮参数进行了多目标正交化分析,得到了3个水平因素的最佳组合,并对正交优化前后的喷雾机进行了性能分析.所得结果表明,对于采用LS翼型的对旋式轴流喷雾机,优化后的风送式喷雾机有效射程提高了34.7%,全压效率提升24.1%.所得结论可为风送式喷雾机的设计指供指导.In order to improve the effective range and efficiency of the air-blast axial-flow sprayer,the simulation model of the inner and outer flow field of the air-blast sprayer was established and verified by experiments.The LS airfoil with close flat bottom was used as the blade airfoil of impeller,and the impeller design and 3D modeling method were proposed.Two impellers were set to contra-rotating mode,effective range and full pressure efficiency were selected as optimization objectives,and the R/S analysis method was used to carry out multi-objective orthogonalization analysis on three impeller parameters,namely,the impeller hub ratio,the difference of blade setting Angle and the number of second blades.The optimal combination of three level factors was obtained,and the performance of the sprayer before and after orthogonal optimization was analyzed.The results show that,for the contra-rotating axial-flow sprayer with LS airfoil,the effective range of the optimized air-blast sprayer is increased by 34.7%,and the total pressure efficiency is increased by 24.1%.The conclusion can be used as a guide for the design of air-blast sprayer.

关 键 词：风送式喷雾机 对旋叶轮 LS翼型 正交试验 有效射程 多目标优化 

分 类 号：TH4[机械工程—机械制造及自动化] S491[农业科学—植物保护]