Design of rotor cage with arc-blade for the turbo air classifier

被引：6
|
作者：
Ren W. [1 ]
Liu J. [2 ]
Yu Y. [1 ]
机构：
[1] College of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing
[2] Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing
来源：
Yu, Yuan (yuyuanjd@263.net) | 2016年 / Chinese Mechanical Engineering Society卷 / 52期
关键词：
Arc-blade; Axial vortex; Cut size; Rotor cage; Turbo air classifier;
D O I：
10.3901/JME.2016.02.195
中图分类号：
学科分类号：
摘要：
The classification performance of a turbo air classifier is mainly affected by matching of air inlet velocity and rotating speed of rotor cage. With the same inlet velocity, increasing the rotating of rotor can decrease cut size to obtain ultra-fine powders. However, it will cause non-uniform distribution of fluid flow and decrease classifying accuracy. A model of the turbo air classifier with straight-blade rotor cage is established and the flow field is simulated by the software of Fluent. To solve the problems including non-uniform distribution of fluid flow and big angle of fluid-attack at the entrance of rotor cage, the blade's shape and installation angle are designed and improved. A method of designing arc-blade rotor cage is proposed. The simulation results indicate that for the arc-blade rotor cage, the angle of fluid-attack at the entrance of rotor cage is decreased, the flow field of channel in rotor cage becomes uniform, and the cut size is also reduced. Calcium carbonate classification experimental results are in agreement with simulation results. In the design condition that air inlet velocity is 12 m/s and rotating speed of rotor is 1200 r/min, compared to the straight-blade rotor cage, the cut size is reduced 11.5% by using the turbo air classifier with arc-blade rotor cage without decreasing the classifying accuracy. © 2016 Journal of Mechanical Engineering.
引用
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页码：195 / 201
页数：6
相关论文
共 15 条
  • [1] Shapiro M., Galperin V., Air classification of solid particles: A review, Chemical Engineering and Processing: Process Intensification, 44, 2, pp. 279-285, (2005)
  • [2] Yu Y., Liu J., Zhang K., Establishment of a prediction model for the cut size of turbo air classifier, Powder Technology, 254, 13, pp. 274-280, (2014)
  • [3] Hiroshi M., Toshiko S., Mechanism of particle separation and analysis of fish-hook phenomenon in a circulating air classifier, Powder Technology, 218, pp. 57-63, (2012)
  • [4] Guo L., Liu J., Liu S., Flow field characteristics of the rotor cage in turbo air classifiers, Chinese Journal of Mechanical Engineering, 22, 3, pp. 426-432, (2009)
  • [5] Liu J., Xu D., Zhao J., Et al., The effects of inertia counter-rotating vortices in vortex classifier on particle classification, J. Xi'an Univ. of Arch & Tech, 30, 1, (1998)
  • [6] Hideto Y., Umi N., Kunihiro F., Effect of blade rotation on particle classification performance of hydro-cyclones, Powder Technology, 164, pp. 103-110, (2006)
  • [7] Wang C., Chen H., Chen W., Analysis of performance parameters of superfine powder wormgear classifier, Journal of Sichuan University, 32, 6, pp. 46-50, (2000)
  • [8] Guo L., Liu J., Liu S., Velocity measurements and flow field characteristic analyses in a turbo air classifier, Powder Technology, 178, pp. 10-16, (2007)
  • [9] Xu N., Li G., Huang Z., Numerical simulation of particle motion in turbo classifier, China Prticuology, 3, 5, pp. 275-278, (2005)
  • [10] Gao L., Yu Y., Liu J., Study on the cut size of a turbo air classifier, Powder Technology, 237, pp. 520-528, (2013)
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