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| Simulation test of returning performance of returning device forfully enclosed belt conveyor |
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| DOI： |
| KeyWord:belt conveyor returning device returning performance discrete element method EDEM |
| FundProject:开封市重大科技专项（19ZD003）；河南省科技攻关计划项目（172102110012）；河南工业大学小麦和玉米深加工国家工程实验室项目（24400033） |
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| Abstract: |
| In order to reveal the motion law and the returning performance of wheat granules in the returning device for fully enclosed belt conveyor, and to provide theoretical guidance for structural optimization of the returning device, the simulation test of returning performance of returning device for fully enclosed belt conveyor was carried out. A multi-sphere superimposed wheat particle model and a discrete element simulation model of the returning device for the belt conveyor were established by using the discrete element software EDEM and Hertz-Mindlin particle contact model. The motion law of wheat granules under the action of returning plate was studied. Two factors-four levels orthogonal experiment was performed with the particle return rate as an evaluation index and the inclination angle of returning plate and belt speed as factors. The results showed that the granules presented four kinds of motion modes under the push of the returning plate. The inclination angle of the returning plate was a main factor affecting the evaluation index, and the belt speed was a secondary factor. The inclination angle of returning plate 0°and the belt speed 3.5 m/s were the optimal combination parameters and the particle return rate was 43.76% under these conditions. Small inclination angle of the returning plate was beneficial to the returning plate to carry more particles and reduced the accumulation of particles at the bottom of the roller. The particle return rate was positively correlated with the belt speed, and high belt speed could increase the particle return rate. The results revealed the return mechanism of the returning device and the influence law of the returning performance, which provided theoretical guidance for the structural optimization of the returning device. |
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