Design And Experiment Test Of Chain-Rake Type Residual Film Recycling Machine

Film mulching planting technology has expanded the suitable cultivation areas for crops in our country,and promoted the increase of crop production and income,which in turn promoted a substantial increase in production efficiency,but the use of mulch film has caused serious mulch film pollution.Cotton is the main economic crop in Xinjiang,and its planting method is mulching.This article aims at the problems of low recovery rate of residual film,low unloading film rate,and high impurity rate of residual film in the mechanized recovery of residual film in Xinjiang cotton fields.Combining the characteristics of Xinjiang cotton planting mode,based on the preliminary research and experimentation,a chain-rake type residual film recycling machine was designed.This machine is suitable for farmland conditions after cotton has been harvested and cotton stalks are crushed back to the field or recycled.It is mainly used for recovering the residual film on the surface of the cotton field.Using the method of combining theoretical analysis and experimental verification,the structure and operating parameters of the residual film recovery machine were optimized and analyzed,and better parameters were obtained.The main research contents are as follows:(1)In order to improve the recovery rate of residual film and unloading film rate of the mulch film recycling machine after autumn,and reduce the impurity rate,a chain-rake type residual film recycling machine was developed.The overall plan of the whole machine was determined,and the basic process of filming combined with pre-separation and conveying was put forward,and then the process of picking,separating,removing trash and returning to the field,unloading,collecting film and transporting film was carried out to realize the recovery of the residual film on the surface of the cotton field.The whole machine was mainly composed of film lifting separation conveying device,transverse trash removal device,triangular chain tooth harrow conveying device,combined film unloading device,reciprocating film transportation box and other devices.(2)Carrying out the structural design and parameter selection of key devices.Construct the filming,pre-separation,and conveying operation process,and complete the structural design and analysis of the film lifting separation conveying device.Construct the work process of picking and separating,and complete the structural design and analysis of the triangular chain tooth harrow conveying device.Construct the operation process of removing trash and returning to the field,and complete the structural design and analysis of the transverse trash removal device.Construct a membrane unloading process and complete the structural design and analysis of the combined film unloading device.Construct the collecting film and transporting film process,and complete the structural design of the reciprocating film transportation box.(3)Carrying out field trials.Use the research results of the above-mentioned key devices to carry out the production of prototypes.Perform performance verification and optimization tests on the film lifting separation conveying device,and perform response surface tests on the index recovery rate of residual film and impurity rate of residual film based on the three factors of the machine selection machine forward speed,the rotation speed of primary separation conveying device,and the separation disc distance,and the optimal parameter combination under the device was obtained as follows: the machine forward speed was4km/h,the rotation speed of primary separation conveying device was 185r/min,and the separation disc distance was 85 mm.It was verified by experiments that the recovery rate of residual film was 86.93%,and the impurity rate of residual film was 37.28%,which met the operating requirements of the film lifting separation conveying device.And under this parameter combination,the optimization test of the operating parameters of the whole machine was carried out.Taking the rotation speed of the film-soil separation device,the rotation speed of the triangular chain tooth harrow conveying device,and the rotation speed of the triangular circulation film unloading device as factors,carry out the experimental research on the recovery rate of residual film and the unloading film rate.The results of the test were based on response surface analysis,and the optimal combination of operating parameters of the whole machine was obtained:the film starting speed was 189r/min,the chain harrow speed was 116r/min,and the film unloading speed was 103r/min.The test verifies and the average recovery rate of residual film was 88.17%,and the average unloading film rate was 89.06%,which achieves the goal of optimizing operating parameters.