| 1. | On the basis of analyzing the aerodynamical property and the construction of usual axial fan , the aerodynamical property and the construction of contra - rotating axial local fan are studied in the paper . moreover , author has designed a kind of contra - rotating local fan , which has the characters of low noise , high efficiency , well aerodynamical performance , optimum structure , and large power
本文在分析了普通轴流式通风机的气动力特征和结构的基础上，研究了对旋式轴流通风机的气动力特性和结构特点，设计并制造出了一种风量大，风压高，噪声低，效率高，气动性能好，体积小，结构新颖的2 30kw新型大功率对旋式轴流局部通风机样机。 |
