摘要：设计了一款外筒旋转型垂直螺旋输送机, 采用离散元分析的方法建立输送性能与设计参数的关系, 通过输送末页岩颗粒的试验验证其可行性。结果表明:通过改变外筒转速, 可以调节外筒旋转型垂直螺旋输送机的填充率、输送量、驱功率和能耗效率。外筒转速越大, 填充率越小;仿真模型外筒转速小于160 r/min时, 输送量随外筒转速增大而增大, 当外筒转速大于160 r/min时, 输送量呈减小趋势;驱动功率随外筒转速增大而增大;能耗效率随外筒转速升高而降低;不需要强迫式给料装置, 在一定输送高度内不需要中间轴承, 结构更加简单;能够在低转速下运行, 利于降低机械磨损、增加设备寿命, 低速输送时能耗效率更高、更加节能。

关键词：散体物料；垂直螺旋输送机；外筒旋转；螺旋叶片固定

Abstract：A casing-rotational vertical screw conveyor was desighed, discrete element method was used to establish the relationship between the design parameters and its performance, and shale particle was transported to verify the feasibility of casing-rotational vertical screw conveyor. The results show that the casing-rotational vertical screw conveyor has the following characteristics. The filling rate, conveying capacity, driving power and mechanical efficiency of casing-rotational vertical screw conveyor can be adjusted by changing casing rotation speed.The higher the casing rotation speede is the lower. filling rate.When the casing rotation speed of simulation model below160 r/min, conveying capacity is increased with the casing rotation speed increased. When the casing rotation speed of simulation model higher than 160 r/min, conveying capacity decline with the casing rotation speed increased. Driving power increases with the casing rotation speed increased. Energy efficiency increases with the increasing speed of the casing. The structure is simple because it has no need of forced feeding device and intermediate bearings are not required at a given conveying height. It can run with low speed, and it is beneficial to reduce mechanical wear and increase equipment life. Energy efficiency is higher and more energy-saving when the equipment runs with low speed.

Keywords: granular material；vertical screw conveyor；casing rotation；stationary helical blade