| Xinjiang is a major province of cotton planting in China.At the same time as the mulching technology increases cotton production,due to the untimely and incomplete recovery of mulch film in cotton fields,a large amount of mulch film residues have caused serious pollution to the cotton field environment.Residue.In order to solve the problem of waste film recycling of the tillage layer and the cost waste caused by the second entry of the ground preparation machine,this paper analyzes the current situation and main problems of the current tillage residue film recycling machine in Xinjiang.On the basis of the research of the machine,the use of finite element analysis,optimization,test optimization and other technical means to study the optimization of poor depth stability of the machine,poor separation of the film and soil of the conveyor,many soil blocks in the film collection box,and uneven soil after operation,etc.The two core components of the film lifting roller and the soil crushing device are to improve the depth limiting wheel and increase the land preparation device,supplemented by field tests,using single-factor and multi-factor tests to check the performance of the machine,and optimize the design of a residual film recovery and The land preparation combined operation machinery realizes the effective combination of residual film recovery operation and land preparation operation.This article mainly studies the following contents.?1?Through investigation and research,the residual film content in the cotton field is measured to obtain the residual amount and distribution characteristics of the residual film in the plow layer of the cotton field.Among the residual film in the plough layer?030cm?,the residual amount of residual film in020cm accounted for 71%of the total.about.Moreover,the mechanical properties of the residual film in the plough layer are lower than that of the new film,so as the burial time becomes longer,the mechanical properties of the residual film in the plough layer will gradually decrease.?2?According to the distribution characteristics of residual film,the overall design of the machine tool is optimized,mainly including the theoretical design and parameter selection of key components such as film lifting device,film-soil separation and conveying device,soil crushing device,ground preparation device,film collection box and transmission system.?3?The ADAMS software was used to analyze the motion trajectory of the comb-tooth film-lifting device.When the operating speed of the tool was 4km h and the rotation speed of the film-lifting device was 140r/min,the motion trajectory was stable and the film-lifting effect was the best.Through the finite element analysis,the prestressed modal analysis of the comb-tooth film lifting knife shows that the natural frequency of deforming the comb teeth is 172.46Hz,but the film lifting device is turned to 140r/min,and the generated frequency is much smaller than the natural frequency.No deformation will occur.The static analysis of the comb-tooth film-lifting knife structure shows that the total deformation of the comb-tooth is0.058416mm,the maximum stress is 28.043MPa,the maximum strain is 1.7265×10-4mm,and the minimum safety factor is 8.9148.There is a case of failure due to low structural strength,and the design is reasonable.?4?Field tests were carried out on the tools,and the rotation speed of the film lifting device,the working speed of the tools and the working depth of the tools were selected as the main factors.The single factor test was used to determine that the flatness was less than 5cm to meet the site preparation standards.The speed of the film lifting device is 140r/min,the working speed of the tool is 4.2km/h,the working depth of the tool is 155mm is the optimal operating parameter of the tool,the recovery rate of the residual film is 75.61%,the impurity rate of the residual film is 7.3%,the flatness is less 5cm,the working index is better than the second generation prototype,and the optimization is reasonable. |
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