| Due to the high efficiency of ridge crop planting,most of the ridges in Gansu Province are widely planted.The ridge operation is widely used after field cultivation of vegetables,soybeans and potatoes.Especially the ridges in potato planting are the most critical process.At present,most areas in Gansu still have artificial ridges,which are inefficient and time-consuming,especially during the sowing period.Most of the existing ridge machines have poor operation results,specifically: the problem of high ridge type coefficient of variation coefficient and unreliable machine tools.In recent years,the area of potato cultivation has increased year by year.Although researchers have improved the ridger,they still cannot meet the demand.Drawing on the development ideas of foreign agricultural machinery,its agricultural machinery is developing into an industrialized,intelligent,systematic and clustered planting mode.In order to design the potato ridge double row ridge machine,it is mainly carried out from the following aspects.Firstly,a ridge-driving machine integrating tumbling,crushed soil and ridge ridge is designed,which mainly includes ridge plough,ridge grading plate,ridge surface pressing plate and pressure roller.In addition,the finite element analysis of the selected ploughing plow body surface is carried out by solidworks simulation,so as to further optimize the design of the ploughing plough structure.In order to meet the requirements of agronomic requirements such as ridge width and ridge height,the ridge plate,the ridge plate and the pressure roller were calculated and designed.Secondly,through by Discrete Element Method(DEM)the finite element simulation software EDEM simulation and multi-body dynamics software RecurDyn software are combined to simulate the ridge hoisting performance of the ridger.During the simulation,the ridge ploughing,inward turning and fine crushing of the soil are found.The rear plate presses the ridge shape into a square body to form a base ridge;the side of the ridge side is flattened on the side;the pressure roller flattens the ridge top to meet the shape and size requirements of the ridge body.The simulation results show that the ridge plough,the whole pressure plate and the pressure roller have good effect on the soil.The influence of the ridge plough on the soil is ridge plough > The whole pressing plate > the whole pressing roller proves that the ridge plough plays an important role inthe ridge effect.Thirdly,the traction factor,the diameter of the rolling roller,the installation angle of the ploughing plough and the inclination angle of the ridged plate are taken as experimental factors,and the variation coefficient of ridge width and the coefficient of variation of ridge height are taken as experimental indicators for single factor experiment research and analysis.On the basis of this,a mathematical regression model of influencing factors and performance indexes was established to optimize the ridge plough structure parameters of the ridger.The installation angle of the ploughing plough and the slanting angle of the ridged plate were studied.The influence of the diameter of the pressure roller on the coefficient of variation of the width of the ridge and the variation coefficient of the height of the ridge height is as follows: the installation angle of the ridge plough into the soil is 11.59°,the inclination angle of the ridge plate is 45°,and the diameter of the pressure roller is 7 cm.The field experiment proved that the optimization result was that the coefficient of variation of the ridge width was 4.51%and the coefficient of variation of the ridge height was 7.52%.Finally,the results of each chapter are summarized and the contents of the subsequent work are prospected. |
PDF Full Text Request