Research On Dynamics Simulation And Layout Of The Buckwheat Picking Harvester

Buckwheat has rich nutritional value and medicinal value.It is a high-quality food and drug-use variety certified by the International Food and Agriculture Organization.Most of the buckwheat is planted in the hilly and narrow hills of the land.The conventional harvesting machinery used for flat land is generally large in size,the position of the center of gravity of the whole machine is unreasonable,the structure is complex,the maneuverability is poor,and it is difficult to adapt to its complex terrain conditions.Therefore,it is of great significance to study the whole machine layout of the buckwheat harvesting machine that adapts to the hilly terrain of the hills.In this paper,the virtual assembly technology is used to formulate the final assembly configuration scheme,and a reasonable dynamic model of the whole machine layout scheme is established and simulated and analyzed,which provides theoretical support for the development of the subsequent hilly mountain buckwheat harvesting machine.The main research contents and conclusions of this paper are as follows:(1)According to the whole machine layout of the existing combine harvester,through the research and analysis of the arrangement of the main components of the buckwheat picking harvester,the first plan(engine front,fuel tank rear)and plan 2(engine center,fuel tank side)are determined.Set)and scheme 3(engine rear,fuel tank front)three complete machine layout scheme;structural parameters design and power calculation for the main components of the buckwheat picking harvester,determine the total engine required for the buckwheat picking harvester Power and power transmission route of the whole machine.(2)The physical model of the main components and three layout schemes was established by using SolidWorks.The limit of the tipping angle was determined by ADAMS analysis of the center of gravity.When the whole machine adopts the layout scheme of scheme 3,the limits of uphill,downhill and lateral rollover are adopted.The tipping angle is the largest.(3)The SolidWorks was used to establish the three-dimensional model of the frame,and the workbench was used to perform static finite element analysis on the frame of the three layouts under four conditions: full load bending,full load obstacle,emergency braking and emergency turning.The overall structure of the machine has the least stress and load on the frame,which is the best overall layout plan.(4)Using RecurDyn to establish a multi-body dynamics model of the buckwheat picking harvester in the optimal machine layout,the driving performance of the harvester on the flatroad,the gully and the different slopes,as well as the driving torque,the dynamic tension of the track,and the driving wheel were studied.The influence law of the force on the track shoes,the pitch angle of the centroid and the roll angle.When the gully is crossed,the pitch attitude of the harvester changes significantly,the driving stability is poor,and the traction force,the driving force of the driving wheel and the track shoe and the track tension are increased.When the vehicle is traveling on the slope,the centering angle and the tilting angle of the harvester are increased.And the track tension gradually increases as the slope increases,and when the slope increases to 30°,the tilt angle of the harvester reaches its limit.