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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 9    No. 4    December 1999

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Complicated motion of particles on vibration screen surface
Zhao Yuemin(赵跃民); Liu Chusheng(刘初升); Fan Maoming(樊茂明)

Department of Energy Utilization and Chemical Engineering; China University of Mining and Technology; Jiangsu; Xuzhou 221008; P. R. China

Abstract:The particles' motion on screen surface was studied by t, he way of nonlinear dynamics. It was found that the particles' motion may be changed from one form to another with its vibration strength. When the vibration strength K is bigger than 1 and smaller than 1. 33, the particles' motion is the bifurcating type;when K is bigger than 1. 33 and smaller than 1. 67, its motion becomes the double bifurcation type; when K is bigger than 1. 67, its motion changes into chaos motion type. On basis of studying all effects of large vibration strength on particles penetrating, it was pointed out that a larger vibration strength K of screen surface will increase the strength of particles' motion, and then increase their probability of penetrating screen surface. A primary theory of particles' motion under large vibration strength for moisture fine coal was established.

 

Key words:  screen surface; vibration strength; bifurcation and chaos

ISSN 1672-7029
CN 43-1423/U

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