Influencing Factors Analysis and Simulation Calibration of Restitution Coefficient of Rice Grain

It is difficult to determine the coefficient of restitution accurately due small size, light weight, and complex influencing factors rice grain. In study, experimental principle was described by impact method, coefficients four typical varieties in Northeast China were measured. According orthogonal experiment, primary secondary affecting grain collision material, spring compression (initial velocity), moisture content, variety. A single factor test carried out for significant factors, results showed that: The a Q235 steel plate, plexiglass seed rubber plate decreased turn, gradually with increase water content. obtained bench simulation test, 0.429 0.423, respectively. reason error discussed analyzed, which effectively verified validity measurement size. This study provides method determination grain, reference optimization design threshing cleaning device combine harvester high-speed precision seeder.