本文以风机叶片数量为试验因素,比较了叶片数为3、6、9、12片时的风机性能。试验发现,当叶片长度、安装角一定时,风机性能与叶片数量并不存在线性增加关系。通过在6长叶片两两之间分别增加一短叶片,发现其性能改善明显,效果较好。在其他结构参数不变的情况下,由6长6短叶片组成的叶轮比原来由6片叶片组成的叶轮的风机,全压、静压和流量分别增加37.8%、44.5%和49.6%。这为农机通用性离心风机的设计提供了试验依据。 In this paper, the number of fan blades as a test factor, comparing the number of blades 3,6,9,12 when the fan performance. The test found that when the blade length, the installation of a certain angle, the fan performance and blade number does not increase linearly. By adding a short blade between each pair of 6 long leaves, the performance improvement is obvious and the effect is better. Under the condition of other structural parameters, the total pressure, static pressure and flow rate increased by 37.8%, 44.5% and 49.6% respectively compared with those of the impeller consisting of 6 blades. This provides a test basis for the design of agricultural universal centrifugal fan.