The Design And Study On The Cutting Platform Of Millet Combine Harvester

Millet is a special crop in China,which accounts for more than 80%of the world's total output.Millet,which is rich in a variety of functional components,is one of the most nutritious crops with relatively high nutritive value and relatively balanced nutrition,and the millet have the effect of anti-hypertension,preventing indigestion,enriching blood and brain,relieving uneasiness of mind and body tranquilization and other functions.Besides it also can reduce wrinkles,pigmentation and other cosmetic effects.In recent years,the market demand of millet is gradually increasing,the price is rising all the way,so the consumption potential is huge.While millet production areas are mainly in the north of China,the traditional production mode,which has the low degree of mechanization,is seriously restricting the development of millet industry.The millet combine harvester has been developed in recent years,but a large number of field experiments show that the loss of the harvester is serious.Based on the above problems,this paper studied and designed the cutting platform of the millet combine harvester,which aims to solve the problem of the serious loss.This paper is based on the study of the structure and the working principle of the existing combine harvester,after learning the mechanical theory and calculation of grain combine harvester,using AutoCAD software,MATLAB,UG three-dimensional software,ANSYS Workbench and so on.Finally the cutting platform of the combine harvester were designed and simulated.The main components of the combine harvester are analyzed through the finite element software.The main contents and conclusions of this paper are as follows:1 The physical properties of foxtail millet were analyzed.The WINDIG software was used to trace the position of millet mature state.Then putting those points into UG software and creating three-dimensional model of millet maturity.It is found that the center of gravity is about 1/3 of the cutting millet from the top in the mature state.The design can be calculated according to the height of gravity of 1/3 in the natural plant height from the top.Actual operation can be adjusted by the vertical height adjustment.2 According to the natural plant height,the height of the center of gravity and the previous design experience,the size of the reel is calculated and designed.The diameter of the reel is 1500mm,the number of the reel shaft is 5,the deviation of the reel wheel is 70mm,the radius of the eccentric ring is 100mm.3 The divider is designed,aiming at solving the difficult separation of corn millet due to twine phenomenon of mature.Using this characteristic of the millet mature interlacing to divider the grain from up.The highest of divider on both sides is more than 1500mm,and on the left side divider increased inside and outside dividing rod,lower grain heap between the reel and divider.4 Using UG NX 10.0 to set up the three-dimensional model of the device and the simulation analysis,the movement of the components running smoothly,there is no interference phenomenon5 The millet combine harvester frame are analyzed the static analysis and modal analysis by using of the ANSYS Workbench14.0 software platform,the maximum displacement of the frame deformation is 0.052934mm,the degeneration is very small;the maximum stress is 25.935 MPa,far less than the allowable stress.The static analysis results show that the strength and stiffness of the frame meet the application requirements.The modal analysis results show that Frame in the course of the operation of the resonance probability is low,can be very good to meet the requirements.