Research On Breaking Soil And Collecting Mechanism Of The Disc Roller Type Residual Film Recycling Machine

Plastic film mulchin g technolo gy has brought great benefits to Chinese agricu lture since the introduction of foreign countries. However, the p lastic film mulch has brou ght serious p ollution to farmland because of the excessive use of agr icultural p lastic film. Recently, the shortage of domestic labor mak es the artificial way to continue collecting p lastic film residue, mechanical r ecy clin g p lastic film r esidue is becomin g the future develop ment trend of the residual film r ecovery. Th e existing residual film recy clin g machin e has the p roblems of low recovery rate, the edge membran e recovery difficult p roblems and so on. In order to imp rove the residual f ilm r ecovery, a d isc roller typ e residual film recy clin g machine was design ed in this p ap er, on the basis of the study of the mechanical p rop erties of the film, the p hysical p rototyp e was made and tested, with the aid of fin ite element theory and the software of the disc and b etween soil and p ole tooth p ick membrane and membran e was analy zed, the p hy sical p rototyp e was designed and tried. This p ap er mainly includes the followin g research contents:(1)Mechanical properties(three directions: transverse, longitudinal and right angle-tearing) were tested by the universal material testing mach ine. The test showed that: comp ared with the time of film mulchin g for 60 day s, the tensile load of the three dir ections on the p lastic film which thickn ess was 0.006 mm were resp ectively 28.458%?25.368% and 36.488%; the tensile load of the three dir ections on the p lastic film which thickn ess was 0.010 mm wer e resp ectively 27.134%?42.357% and 41.866%; the tensile load of the three directions on the p lastic film which thickness was 0.014 mm were resp ectively 34.135%?49.838% and 37.374%. In winter, comp ared with the time of film mulch in g for 100 d ay s, the tensile load of the three directions on the p lastic film were resp ectively 59.027%?33.624% and 47.267%; the elongation at break was63.310%?87.788% and 81.312% resp ectively.(2)According to the working principle of the disc ground breaking mechanism, a disc roller type residual film recy clin g machine was designed. The disk diameter and curvature radius, ed ge an gle, thickness and other p arameters were determined accord in g to the design requ irements on band ed ge film; the shap e of the p ickin g film and the arr an gement of the roller were determined; the locus equation of the movement of the film p icking rod tooth was analy zed.(3)Simulated analysis of the process of the disc broken soil was carried on with the method of transient dynamic disp lay, the analy sis results showed that: the coverage of the harden soil for the disc was the largest when the disc broken soil angle was 30°. The stress focused on the disk, the hilling p henomenon ap p eared as the increase of the force ar ea and the resistance, the effects of soil crushing was affected when the disc broken soil angle was 40°.Contact analysis of the p ickup rod tooth and the film was carried on with the method of nonlinear contact, the analy sis results showed that: the largest deformation of the residual film with the single p iece of rod tooth action range was 2.688 mm, the largest stress was 31.023 MPa, and the maximum of the action effect occurred at the contact p oint of the p ole tooth. The soil-film fin ite element comp lex model was built, an aly zing the effect of the p ickup rod tooth and the comp lex mod el of the soil-film, for the soil the maximu m stress and strain were resp ectively 0.958 MPa and 1.439 mm/mm, for the p lastic film they were resp ectively 0.015 M Pa and 1.966 mm/mm.(4)The experiment of the rate of picking up and ground breaking was finished using orthogonal test in the field when considerin g the sp eed of the machine, the radius of the disc and the working angle of the disc. The exp erimental results showed that: the rate of ground breakin g was the best when the disc radius was 160 mm, the sp eed of the machine was 0.85m/s, the working an gle is 20°; the rate of p icking up was the best when the disc radius was 120 mm, the sp eed of the machine was 1.20 m/s, the working angle is 20°.