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 rela...