Abstract: On the basis of analysis on difference of structures and inlet way of traditional and new cones, the velocity distribution in direction z of the export torus and the internal flow field motion rules of the 2 devices are investigated using Fluent software to carry on fluid dynamics analysis. The results show that the new cone uses circular full face ventilation, so the speed in direction z of the export torus is evener. The internal flow of new cone forms vortex and the air fills full of export torus, because of the effect of the spiral case and guide blades. The uneven export wind speed and the disadvantages of blind separation of the traditional cone are overcome. The new cone has a higher level of second classification. The reliability of simulation results is verified which provide a optimization scheme of the improvement of the classifier wind inlet structure.

Keywords: classifier; new lower cone; the third wind; velocity distribution.

中图分类号：TH44        文献标志码：A

文章编号：1008-5548（2014）03-0021-04

DOI:10.13732/j.issn.1008-5548.2014.03.005

收稿日期：2013-07-29， 修回日期：2013-10-18，在线出版时间：2014-06-24。

基金项目：四川省科技厅支撑计划项目，编号：2010GZ0135。

第一作者简介：张胜林（1988—），男，硕士研究生，研究方向为先进制造技术。 电话：18030980725，E-mail：449028076@qq.com。