基于离散元法的残膜伸缩齿式滚筒捡拾装置设计与试验OA

Aiming to address the current issues of low surface film collection efficiency and difficult film removal in residual film recovery machines,an improvement to the collection mechanism of an existing residual film pick-up and baling machine was proposed.A cam-controlled telescopic-tooth drum collection device was designed.The overall structure and operating principle of the telescopic-tooth roller pick-up device were elucidated.Through force analysis of the residual film collection process,the bending angle,rotational speed,and arrangement of the telescopic teeth were determined.The profile curve equation of the cam disc was analyzed,and the actual cam profile curve was obtained via the inversion method.A multi-phase discrete element model of film-soil-straw interaction was established.Using roller rotational speed,forward speed,and working depth as experimental factors,and residual film surface collection rate as the evaluation metric,a quadratic regression orthogonal rotational combination test was conducted.The influence patterns of each factor on the residual film surface collection rate were analyzed,determining the optimal parameter combination for the collection device:roller rotational speed of 57 r/min,forward speed of 7 km/h,and working depth of 47 mm,achieving a residual film surface collection rate of 90.8%.Field validation tests yielded a surface collection rate of 87.78%,with a relative error of 3.33%.The improved equipment demonstrated a 16.02 percentage points increase in surface collection rate,meeting operational standards.These research findings can provide theoretical foundations for residual film recovery machine design and hold practical value for addressing'white pollution'in agricultural fields.