Design And Optimization Of Ridging And Film Mulching Machine Applicable To Clay Environment

Ridge farming and film mulching is a widely popularized agricultural technology.With the development of economy and society,its operation mode is gradually transformed from manual operation to mechanical operation.However,at present,the traditional film mulching machines on the market have problems such as low ridge quality and poor mulching effect when working in the southern clay environment,which cannot meet the needs of mechanical operations.Therefore,this paper mainly aims at the above problems,completes the design and optimization of the ridging and film mulching machine,and improves its working performance in the clay environment.The specific research contents are as follows:1.The structure of the ridging and film mulching machine is designed,so that the ridge mulching machine can complete multiple processes such as ridge raising,film stretching,film laying,film pressing,and soil covering in one operation.Aiming at the problems of the traditional film mulching machine in the clay environment,such as serious soil adhesion,high ridging resistance and easy tearing of the film,the improvement design of the ridge-raising mechanism,the ridging plough,the film stretching mechanism and the film pressing mechanism was carried out.2.ANSYS/Workbench software was used to carry out finite element analysis on the main load components(ridge-raising mechanism,ridging plough and film mulching frame)of the ridging and film mulching machine to ensure that the structural strength and stiffness meet the requirements.Based on the variable density method and SIMP(Solid Isotropic Material with Penalization)model,topology optimization of the frame was carried out.After topology optimization,the maximum deformation and maximum stress of the frame are reduced,the overall mass is reduced by 44.0%,and the first-order natural frequency is increased by 24.6%.On the premise of ensuring the strength and stiffness meet the requirements,the lightweight design of the frame is achieved.3.The dynamics and kinematics of the ridge-raising mechanism were analyzed,and the parameter optimization model of the ridge-raising mechanism in the clay environment was established.Based on the improved genetic algorithm,the parameters of the ridge-raising mechanism are optimized.The optimization results are as follows: under the power of 10 kw,the maximum rotation radius of the ridge-raising mechanism is 460 mm,the helix Angle is 30°,the cutter shaft speed is328 rpm,and the forward speed is 3.3km/h.The working process of ridge-raising mechanism was simulated by using discrete element simulation software EDEM,and the simulation results verified the effectiveness of parameter optimization.4.The field experiments of the ridging and film mulching machine was completed,and the test of ridge quality and mulching quality was carried out.The experimental results verified that in the clay environment,compared with the traditional film mulching machine,the quality of ridge increased by 10% on average,the quality of film mulching increased by20% on average,and the working efficiency increased by 19.2%.The overall working performance was greatly improved and the working quality met the national agronomic requirements.This article has 127 figures,24 tables,81 references.