垂直螺旋输送机临界转速的仿真研究

发布时间：2018-05-03 11:16

本文选题：垂直螺旋输送机 + 临界转速　；参考：《中国粉体技术》2017年05期

【摘要】：为确定实际模型的临界转速,采用EDEM、RecurDyn和ADAMS.2建立螺旋直径为400 mm、升程为330 mm的双螺旋垂直螺旋输送机和单个颗粒的仿真模型;通过仿真确定临界转速的区间,根据二分法不断缩小临界转速的区间,直至得到临界转速终止仿真;在EDEM中建立输送高度为0.3 m、填充率分别为20%、40%、60%和80%的颗粒群仿真模型,采用相同的方法完成仿真。结果表明:仿真结果验证了粒子与螺旋面、罩壳内壁之间的接触力类型,得到单个颗粒时螺旋的临界转速约为70 r/min;4种填充率下的临界转速分别为75、81、91、100 r/min;单质点法求解的理论临界转速为82 r/min,与单个颗粒、输送高度为0.3 m、填充率为20%和40%的颗粒群仿真结果接近,而小于输送高度为0.3 m、填充率为60%和80%的颗粒群仿真临界转速。说明单质点理论只适用于小填充率的垂直螺旋输送机模型。
[Abstract]:In order to determine the critical speed of the actual model, the simulation model of the double helix vertical screw conveyor with 400mm diameter and 330mm lift was established by using EDEM RecurDyn and ADAMS.2, and the critical speed interval was determined by simulation. According to the dichotomy, the critical speed stop simulation is obtained, and the particle group simulation model is established in EDEM, where the conveying height is 0.3 m and the filling ratio is 20% and 80%, respectively, and the simulation is completed by the same method. The results show that the contact force between the particles and the helical surface and the inner wall of the shell is verified by the simulation results. The critical rotational speed of the spiral is about 70 r / min when a single particle is obtained, and the critical speed of the spiral is 75 / 81 / 91100 rm / min, respectively, and the theoretical critical speed calculated by the single mass point method is 82 r / min, which is similar to that of a single particle. When the conveying height is 0.3 m, the critical speed of particle group simulation with filling ratio of 60% and 80% is close to that of particle group with filling ratio of 20% and 40%, but smaller than that of conveying height of 0.3 m and filling rate of 60% and 80% respectively. It shows that the single point theory is only suitable for the vertical helical conveyor model with small filling rate.
【作者单位】：同济大学机械与能源工程学院;
【基金】：上海市科技成果转化和产业化项目,编号:15DZ1161203
【分类号】：TH224

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