Authors

Abstract

In order to adapt to the needs of modern intelligent warehousing and reduce the unloading side pressure of grain silo, the influence of curved funnel on the unloading process is designed and analyzed, and this paper uses EDEM simulation software and Hertz Mindlin model for analysis. The results found that compared with the unloading characteristics of the conical funnel, the unloading side pressure is effectively improved; in the unloading process, with the increase of the shrinkage rate, the critical position of the flow transformation increases and the flow velocity of the particle group accelerates. However, the flow velocity of the particle group decreases when it reaches the critical position of 250 mm. Combined with the corresponding analysis, this paper uses the Froude number to quantitatively express the mobility of particles. As the shrinkage rate of the curved funnel and the unloading height increase, the Froude number also increases. This paper analyzes and calibrates the curved funnel for soybean unloading in silos, which will provide useful reference for avoiding arching and clogging during the unloading process of grain particles.

Abstract in Chinese

为适应现代化智能仓储的需求，减少粮食筒仓卸料侧面压力，设计并分析了曲面漏斗对卸料过程的影响，本文利用EDEM仿真软件，使用Hertz-Mindlin模型进行分析。结果发现，对比于锥形漏斗的卸料特性，有效改善卸料侧压力；卸载过程中，随着收缩率的增大，流形变换的临界位置增大，颗粒群的流动速度加快。然而，当达到临界位置250mm时，颗粒群的流速减慢。结合相应分析本文采用弗劳德数对颗粒的流动性进行了定量表述，随着曲面漏斗收缩率和卸料高度的增加，弗劳德数也在增大。本文对筒仓大豆卸料曲面漏斗的分析标定，将为解决粮食颗粒的卸料过程避免结拱和堵塞提供有益的参考。