Modern Manufacturing Engineering ›› 2025, Vol. 539 ›› Issue (8): 134-140.doi: 10.16731/j.cnki.1671-3133.2025.08.015

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Study on conveying performance of double screw conveyor with different structure

YAO Yanping1, WANG Hao1, LIU Weili2, ZHOU Lidong1   

  1. 1 College of Mechanical Engineering,Taiyuan University of Science and Technology, Taiyuan 030024,China;
    2 Taiyuan Institute of China Coal Technology and Engineering Group Co.,Ltd.,Taiyuan 030024,China
  • Received:2024-11-25 Online:2025-08-18 Published:2025-09-09

Abstract: In order to study the conveying efficiency of the horizontal double screw conveyer when conveying the viscous material and the integrity of the viscous particles after the conveying process,and to seek the optimum structural parameters of the conveyer,on the premise of ensuring the filling rate of 30 %,by changing the three parameters of screw diameter,screw pitch diameter ratio and overlap area ratio of the conveyor,the simulation was carried out in the discrete element software EDEM,the relationship between the structural parameters and the average axial velocity of particles and the particle breakage rate was studied and the better parameter combination was selected. The effects of the parameters on the average axial velocity of particles and particle breakage rate were evaluated. The results show that increasing the screw diameter is beneficial for enhancing the conveying efficiency of the double screw conveyor when transporting viscous materials,and the change range of particle breakage rote is less than 5 %,and the ratio of screw pitch diameter and overlap area should not be too large. The optimum structure parameters are:screw diameter 200 mm, screw pitch diameter ratio 1,overlap area ratio 0. The three parameters have significant effects on the average axial velocity of particles,the overlap area ratio has a significant effect on particle breakage rote,while the other two have no significant effect.

Key words: double screw conveyor, screw diameter, screw pitch diameter ratio, overlap area ratio, average axial velocity of particles, particle breakage rate

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