and construction of the simulation model

 

 

ZHU He jia1, ZHAO Zhang feng1, JIANG Xiao liang2

 

(1. Key Laboratory of Special Purpose Equipment and Advanced Processing Technology,

 

Ministry of Education, Zhejiang University of Technology, Hangzhou 310014, China;

 

2. Zhejiang Shangyang Machinery Co., Ltd., Quzhou 324000, China)

 

 

Abstract: In order to solve the problems of low efficiency in tea planesurface round sifter screening process ,the motion path of the singleparticle tea on the screen was analysed. By considering all positions where tealeaves penetrate through the mesh, probability of tealeaves going through the screen was obtained. Based on these and the influence of leaf layer′s thickness, a sifter machine model was developed by solving the penetrating rate differential equation to simulate the screen process in assistance of Matlab/Simulink. The simulation result shows screen efficiency varies with running rate and feeding amount of the machine. To achieve high screen efficiency, screen rate should be kept in range of 230r/min~235r/min and feed amount should be restricted between 300kg/h and 600kg/h.

 

Key words: tea planesurface round sifter; screen model; screen effect; Matlab/Simulink