| The soil properties in different regions of Xinjiang are different,and the crop planting patterns are also quite different,so the ploughing operation under various soil conditions needs to be further studied.In order to achieve efficient operation,high-speed flipping plough has been widely used.For modern agriculture,about 70%of the consumption of field operations is spent on ploughing projects.However,at present,the high-speed plough body mainly depends on imports,and the localization of the plough body still has great deficiencies in the aspects of operation quality,work efficiency,reliability and so on.Therefore,it is necessary to study and analyze the plough tillage resistance,by changing the plough structure so that the resistance can be reduced,so that the plough performance can be improved and farming efficiency can be improved.In the research and analysis,this paper is mainly divided into two parts:choose the soil in southern Xinjiang as the research scope,study the force of the plough body under this background,and test the force of the moldboard single plough by using the digital soil trough.Through the analysis and study of the force on the plough body during ploughing,the specific resistance model of the plough body is established,and the key parameters affecting the plough body tillage resistance are analyzed to determine the key parameters.In this paper,the plough tillage experiment was carried out in the soil trough laboratory to study the effect of ploughing traction resistance under different influencing factors,and the relationship between soil moisture content,soil firmness,soil adhesion and plough tillage resistance was summarized.the resistance regression equation of plough tillage was calculated.The parameters are optimized by using the regression equation.The experiments were carried out under the conditions that the soil moisture was 10%~25%,the tillage depth was 20cm,the tillage speed was 5~12km/h,the soil firmness was 200~230N/cm~2,and the soil adhesion force was 1.5N~2.5N.The best parameters were determined by orthogonal test.In this paper,when carrying out the orthogonal test,we first carried out the three-factor and three-level test,and when analyzing the results of 9 groups of experiments,we used MATLAB to analyze and study the significance of body stress factors,so as to obtain the significance level of different factors.secondly,this paper studied and analyzed the stress test of plough surface,and measured the force of plough body under soil moisture,firmness and adhesion.When analyzing the force distribution of the plough surface,the ANSYS software is used,and a model is built on this basis,so as to summarize the scheme to improve the working performance of the plough and reduce the resistance in the soil.The research content of this paper shows that:(1)based on the above factors significant test,the soil humidity no more than 25%,the test of the plough body force and torque in different soil moisture,firmness and corresponding relation of soil adhesion force,at the same time by comparing the size of each force,poor and variance,validation when the soil moisture content in 17%,minimum tillage resistance(2)through the above significance test,when the range of soil firmness under sandy soil conditions in xinjiang was measured to be 195~240N/cm2,the resistance of plough body under such conditions was measured to gradually increase with the increase of firmness.When the tillage depth is no more than 200mm and the soil firmness is 220N/cm2,the resistance of the plow body is the least and stable.(3)in the plow body surface stress analysis,using the ANSYS to tell plow body surface analysis it is concluded that the plough body surface of stress and strain distribution,through the stress and strain contours of that plow body surface stress in the tops of the plough shovel and LiBi,biggest and very concentrated,when plow deeply 20 cm,speed of 6 km/h,maximum pressure of plow body surface is 95.848 Mpa.(4)Constructed a quadratic response surface regression equation for specific resistance,based on a ploughing depth of 20 cm,a ploughing speed of 6 km/h,a plough height of 24 cm,a soil lift angle of 37°,and a bulldozing angle of 84°as parameters.The structure of the surface of the plough body was constructed.The optimized resistance of 2.85 N/cm2 was the result of the tillage specific resistance,and the numerical analysis results showed that the tillage specific resistance can reduce the resistance by 8.96%to 22.7%.Such structural parameters are more suitable conditions.Through the above results,the same ploughing depth,by controlling the plough tillage soil conditions can reduce the plough resistance,reduce energy consumption,save resources,can also according to the force of the plough body farming optimize the plow body surface,thus reducing the stress of the cultivation of plow body surface,to improve the efficiency of the plough body cultivation. |
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