Design And Experimental Study Of Disc Film Device And Disc Breaking

With the spread of the film technology, agricultural producers gradually understand its advantages in soil conservation, heat preservation, inhibiting the growth of weeds and other aspects. As a result,this technology is widely used in the process of cultivation.However,the increase of membrane area leads to the more and more film residue in the filed, which pollutes the land and environment.Although the way o using mechanical film can improve efficiency and reduce the high labor intensity compared with the manual picking up, the existing mechanical film collecting machine can not achieve the purpose of collecting the side film entirely. After a growth cycle of the crop, the soil on the side film often occurs in soil hardening phenomenon, which makes the obstacle on the mechanical recycling.This paper concentrate on using disc crushing device, smashing the hardening soil on the side film, cutting the side film in a specific angle and making the side film turn up to the soil surface with the disc, in order to achieve the purpose of recycling the side film. The main research contents include:1)According to the structure of the single disk opener and residual film recovery machine,the edge recycling machine is designed and the physical prototype is manufactured by the structure diagram. The model of disk force and soil triangle wedge model are established. According to mechanics theory, the disturbance of soil during the process of disc debris is researched.2)The longitudinal,transverse and right angle tearing tensile test of plastic film model with thickness of0.006 mm is carried out.The experimental results show that the maximum tensile load is 2.165N、0.873N、1.083 N.The static strength of plastic film is analyzed by the software of Workbench,the results show that the ultimate stress of plastic film is 10446 Pa.3) According to the theoretical analysis, using ANSYS simulation software, using nonlinear finite element method, the static analysis of disc soil crushing device of the disc, the stress mainly concentrated in the vicinity of the center hole, the biggest stress of the deepest point is 11.5MPa.The dynamic analysis o the process of disc break, ground observation disc stress and soil deformation process. In x, y, z direction o soil deformation maximum value is 39.01 mm 、57.66 mm 、54.07 mm.4) Orthogonal test methods and field tests were conducted on the disc soil crushing device, to test the soil before and after drying and weighing, the results calculated by the test index of soil breaking rate obtained in each test of orthogonal table. By range analysis found in the disk radius 160 mm, speed5.304km/h, dip angle is 30 degrees of disc break soil had the best effect. Through variance analysis showed that the disc radius factors have significant influence on the general index test, the working angle factors have very significant impact on the index test, speed factor on the test index has significant influence on the general index test.