摘要
介绍了国外局扇的性能及结构特点。国内煤炭系统的局扇按叶轮的型式主要有四大类,即单级或双级机翼型叶片、单级子午加速式叶片、单级扭曲斜流式叶片以及两级对旋轴流式等厚圆弧扭曲叶片。
The author analyses models and construction characteristics of mine secondary fans made in ex-USSR, Pcland, Germany, Japan, USA and Sweden. Dependening on models of mine secondary fans' blade wheels, blades are divided into four kinds, single stage or double stage aircraft wing type blade; single stage meridian acceleration type blade; single stage torsion oblique air flow blade and double stage symmetry axial-flow blade, all of four type blades are thick circular arc torsion blades. In order to improve characteristics of fans made in China author suggests that (1) reform old type fans to increase overall fan efficiency up to 70-75% and to decrease noise level down below 90 db (A); (2) improve new type and well designed fans to produce new series fans with overall fan efficiency up to 75-80% and noise level down below 85 db (A).
出处
《煤炭科学技术》
CAS
北大核心
1992年第11期7-13,共7页
Coal Science and Technology
