| Technology of corn straw deep returning into soil using appropriate machines ensured that both the straw and fertilizer got placed and buried deeply.Several deep ditch corn straw returning machines have been developed for this purpose.However these machines were found to have problem of large soil blocks being lifted together with the undetached stubbles,this of course,have been a great limitation to the main objective of deep return ditching.Paper yushu city of jilin province mechanized returning straw buried deep test and the shortcomings of existing ditcher,developed a kind of can apply drip returning straw buried deep trenching and stubble feature set in one ditch stubble machine,the machine can be in straw counters-field trenching work complete stubble breaking soil homework at the same time.And field performance test,determine the returning straw buried deep trenching stubble machine design of optimal parameters.(1)The design scheme of the overall structure of the deep soil ditching machine for corn straw returning was determined.This paper introduces the structure and working principle of the whole machine,and designs the key parts of the machine.In the design of key parts,The main design of the guiding device,stubble soil crushing device and a ditching device.And the equipment supporting power is selected.(2)Respectively using Solidworks software and ANSYS software of straw returning deep trenching and stubble machine for modeling and simulation analysis.The models of various parts in ridging-fertilizer in straw deep returning were setup using Solidworks software.The model includes the main frame,Guiding device,stubble soil crushing device,a ditching device and a connecting component.After modeling,the parts were assembled into whole machine.Assembly inspection was done to determine the reasonable size and position of the assembly parts.The finite element analysis software ANSYS is used to analyze the frame and the guide device.Through the modeling design,the structure of the machine can be more reasonable,and the unnecessary waste caused by the development of the machine can be avoided.Simulation analysis can check the rationality of the machine,get the key parts of the parts,and in the use of the process should pay attention to the possible part of the mechanical failure,easy to use.(3)The prototype was tested in the field,and the work quality was satisfied with the agronomic requirements.The test design the soil depths of cut for shovel guide,machine rotary speed and stubble smashing unit were considered as experiment factors,while tillage resistance,and percentage soil-breakage as performance indices.The results show that the influence of three factors on the degree of soil breaking rate from big to small is as follows:soil depths of cut for shovel guide,stubble smashing unit,machine rotary speed.the influence of three factors on Working resistance rate from big to small is as follows:machine rotary speed,stubble smashing unit,soil depths of cut for shovel guide.The evaluated results further showed that for a rotary speed of 340 rpm and respective depths inside soil,for the guide shovel and stubble cleaning unit of 100 mm and the 60 mm,optimum operating resistance and percentage soil breakage(fineness modulus)were found to be 21.6 KN and 96.3%respectively.The prototype has a good effect of broken soil and can guarantee the quality of ditching.The stability of the ridge and the stability of the groove and the width of the groove and the flatness of the groove are in accordance with the national standard of corn planting ridge index,for the future improvement of the machine provides a reference.(4)The operation time of straw deep returning furrow stubble cleaner was carried out to investigate the measurement and analysis of utilization,operation efficiency and economic analysis of survey data,the operating time of the unit utilization rate was 73.7%,efficiency was 5.926 hm2/h,the total efficiency of 4.136 hm2/h and 0.0672 0.0672 hm2/(h·kW)units of power efficiency,can satisfy the operation request.Finally,some suggestions are put forward to improve the working efficiency of the machine. |
PDF Full Text Request