Research on seed-filling mechanism of vertical shallow basin type seed-metering device with composite filling force

On account of the decreasing of filling ability of hole at high operating speed caused miss-seeding, even leaded to reduce production, mechanical precision seed-metering device was gradually eliminated from application markets. How to improve the filling ability of mechanical precision seed-metering device to meet the mechanization requirements at high operating speed was the key point of the research. The structure of new type seed-plate was based on the traditional vertical seed-plate. EDEM (engineering discrete element method) software was utilized to simulate and analyze, and then physical prototype experiment was conducted to verify the theoretical analysis and simulation results. Taking the traditional vertical seed-metering device and shallow basin type seed-metering device as experimental subjects and the rotational speed of seed-plate as experimental factor, the single factor contrast experiments were conducted. The experiment results show that the simulated and experimental values of variation trend