蜗壳宽度对采棉机风机气动性能的影响  

Influence of Volute Width on Aerodynamic Performance of Cotton Picker Fan

作　　者：王晨[1] 木合塔尔.克力木 孙海霞[1] 

机构地区：[1]新疆大学机械工程学院,新疆乌鲁木齐830047

出　　处：《液压与气动》2017年第12期48-52,共5页Chinese Hydraulics & Pneumatics

基　　金：国家自然科学基金(51365052)

摘　　要：为探寻更为合理的采棉机风机蜗壳宽度,分别建立了5种不同蜗壳宽度的风机模型。采用数值模拟的方法分析研究了蜗壳宽度变化对风机性能的影响,并对比分析了改良后的风机和原风机在不同流量工况下的流场特性。结果表明:随着蜗壳宽度增加,风机性能降低。当蜗壳宽度减小10 mm时,风机全压和吸口负压明显增大,风机性能得到提高;但当蜗壳宽度进一步减小20 mm时,风机性能又明显下降。改良后的风机较原风机流场质量得到了一定程度的改善。In order to search a more reasonable width for the fan volute of cotton picker,we establish five fan models with different volute widths. Using the method of numerical simulation,we analyze the influence of volute width change on the performance of fan. We compare and analyze the flow field characteristics of the improved fan and the original fan under different flow conditions. The results show that with increase of the volute width,the fan performance reduces. The fan performance improves when the width of volute decreases by 10 mm,and the total pressure and the suction negative pressure obviously increase. But the fan performance drops when the width of volute decreases by 20 mm. After optimizing the fan,we make the flow field quality improve to a certain extent.

关 键 词：蜗壳宽度 风机性能 流场质量 

分 类 号：TH138[机械工程—机械制造及自动化] TH114