垂直螺旋输送机生产率计算模型的修正

Correction of productivity calculation model of vertical screw conveyor

为使垂直螺旋输送机的生产率计算模型更符合实际生产情况,在单质点法分析的基础上,以细沙为物料进行实验,考察螺旋转速、取料头转速及细沙垂直输送速度对生产率的影响;基于计算模型推算输送管内物料的填充率,利用MATLAB函数拟合功能,得到生产率与螺旋转速、取料头转速的定量关系式,结合实验测得的垂直输送速度,完成生产率计算模型的修正。结果表明:生产率随垂直螺旋转速的增大而增大,且增长幅度逐渐降低,随取料头转速的增大而近似线性增大;修正后的模型能较为准确地预测垂直螺旋输送机的生产率,平均计算误差在10%以内。

In order to make the productivity calculation model of the vertical screw conveyor more in line with the actual situation,based on the analysis of single-point method, fine sand was used as the material for experiments to examine the influence of screw rotation speed, feeder rotation speed and the vertical conveying speed of fine sand on productivity. Based on the calculation model to calculate the filling rate of the material in the conveying pipe,and using the MATLAB to fit function, the quantitative relationship between the productivity and the screw rotation speed and the feeder rotation speed were obtained, and the correction of the productivity calculation model was completed in conjunction with the experimentally measured vertical conveying speed. The results show that the productivity increases with the increase of the screw rotation speed, and the increase rate gradually decrease,and increase linearly with the increase of the rotation speed of the feeder. The modified model can predict the productivity of vertical screw conveyors more accurate. The average calculation error is within 10%.