摘要：为了分析螺旋轴直径对螺旋输送机性能的影响, 采用颗粒物质力学方法, 借助离散元分析软件, 首先对模型进行了验证, 通过选取一组不同尺寸的螺旋轴, 其他模型参数不变, 采用周期性边界处理方法, 考察螺旋轴直径在不同螺旋转速下对螺旋输送机性能的影响。结果表明:随着螺旋转速的增加, 相同螺旋轴对应的颗粒平均速度增大, 能量消耗增加, 法向接触力增加, 颗粒输送的稳定性降低;在相同的螺旋转速下, 随着螺旋轴直径的增加, 单位体积上的颗粒数增加, 流化层深度增加。得出在保证输送量的同时, 甄选螺旋转速900 r/min, 螺旋轴直径13 mm为最合适的一组参数。

关键词：螺旋输送机；螺旋轴；输送性能；离散元方法

Abstract：In ord er to analyze the influence of the screw shaft diameter on the performance of the screw conveyor, the method of granular mechanics was used. By means of the software of discrete element method, the model of screw conveyor was verified. Through choosing a group of variable screw shaft and keeping the model parameters still, the method of periodic boundary was adopted, and the influence of different diameters for screw shaft on the performance of the screw conveyor in the different rotational velocity were discussed. The results show that with the increase of rotational velocity, the average particle velocity increases, the energy dissipation increases as the same screw shaft, and the normal force between particles increases, the steady of the conveying particle reduces. With the increase of diameter of the screw shaft, the number of particles increases in the unit volume and the depth of the fluidized layer increases.The better match has been got of the test is that the screw shaft diameter is 13 mm and the rotational velocity is 900 r/min.

Keywords：screw conveyor；screw shaft；conveying performance；DEM