| According to the mechanism of turbulent drag reduction, improved the design of 4UD-600 potato digger. A parametric model for the vibrating structure of 4UD-600 potato digger was established using ADAMS software. After analyzing the relative motions of materials on separating screen surfaces, to achieve highest productivity, an optimization of this vibrating structure was performed, and resulted in optimal combination of parameters. The optimal combination of parameters were: the length of crank LOA=5.5 mm, the length of swing arm LBD=570 mm, the length of main screen pendulum rod LEF=110 mm, the length of connecting rod LJK=160 mm, the speed of crank nOA=4.666°·s-1. After this optimization, results showed that the average moving speed of materials along the screen surfaces was increased from 0.089 m·s-1 to 0.122 m·s-1, significantly improving the productivity of the excavator. Validity of the theory had further been verified in subsequently actual improvement design. |