Research On The Passing Performance Of Reed Shoot Harvester

At present,the field of mechanized harvesting of reed shoots is still blank at China and abroad.The harvesting of reed shoots is mainly manual harvesting,which is labor-intensive and low-efficiency.and complicated in operating environment.Therefore,the development of a reed shoot harvester that can walk on it’s own and harvest integration has important theoretical and practical significance for the development of reed shoot industry and the subsequent research and development of reed shoot harvesting equipment.Combined with the growth characteristics and harvesting environment of reed shoots,this paper makes theoretical analysis,independent design and prototype trial production of the chassis and its key components of reed shoots harvester.According to the above design basis and combined with the growth terrain and geomorphic characteristics of reed shoots,this paper studies the climbing,obstacle climbing and Anti rollover and other driving performance.What’s more,this paper also studies the main factors affecting the above dynamic characteristics.The main research contents of the paper are as follows.1.According to the growth characteristics,growth terrain and geomorphic characteristics of reed shoots,the design goal and working principle of reed shoot harvester are put forward.Firstly,the frame is designed,and the structural strength analysis and modal analysis of the frame were carried out based on Ansys to verify the strength reliability of the frame design and the rationality of the modular counterweight of the whole machine.In addition,the structure design and type selection calculation of power system,lifting mechanism and conveying mechanism are carried out.Beside,the power matching is carried out.Finally,the three-dimensional model of the whole machine is established through inventor,which provides the basis for the subsequent multi-body dynamics simulation.Based on the above,the prototype trial production of reed shoot harvester is completed,which provides a platform for field experiment.2.In this paper,the performance of the whole machine over obstacles and across ditch is analyzed.Firstly,based on the terrain characteristics of the working environment of reed shoot harvester,the driving dynamics model of the whole machine is established,and the driving kinematics relationship,driving traction as well as driving resistance of the whole machine on soft ground are studied and analyzed.Then,the driving performance of the whole machine such as obstacle crossing(crossing vertical obstacles)and ditch crossing is explored,and the internal and external factors affecting the driving performance of the whole machine are explored and analyzed.Finally,combined with the above analysis,the passing performance is evaluated.3.Based on the three-dimensional model of reed shoot harvester,the mechanical analysis of the whole machine is carried out,and the tipping and sliding critical state models of the whole machine under different states are established.Based on the three-dimensional model of the reed shoot harvester,the mechanical analysis of the whole machine was carried out.The critical state models of the whole machine overturning and slipping under different conditions were established too.The lateral and longitudinal anti-overturning performance as well as anti-slip performance of the whole machine are studied.What’s more,the lateral and longitudinal limit inclination angles and slip angles of the whole machine are analyzed and obtained.Finally,the influencing factors of the anti-overturning under different states of the whole machine are studied through numerical analysis.4.Based on the three-dimensional model established by inventor,multi-body dynamics simulation is carried out through RecurDyn software which verify the driving performance of the whole machine.At the same time,the field test of the reed shoot harvester prototype is carried out according to the agricultural machinery production test method,which verifies the correctness of the theoretical analysis model and simulation model.The above analysis provides reliable data for the structural optimization and theoretical upgrading of the reed shoot harvester.