Simulation analysis of effect on structural parameters of vertical rotary tiller blade based on discrete element method
In order to explore the influence of structural parameters of vertical rotary tillage blade on its own stress and operation effect during operation,a discrete element model of vertical rotary tillage blade operation process was established by using single factor test method.The effects of blade bending angle,blade edge angle and necked-in blade edge on soil entry resistance,tillage resistance,torque and soil breaking rate of vertical rotary tillage blade,and the effects of blade tip fillet radii on soil entry resistance of vertical rotary tillage blade were studied.Through the orthogonal experiment,the prediction model of the influence of the blade bending angle,blade edge angle,necked-in blade edge on the resistance,torque and soil breakage rate of vertical rotary blade was studied and established.The response surface analysis and the constructed prediction model were used to optimize and analyze the above three angle parameters with the aim of reducing drag and lifting efficiency.The obtained results showed that when the blade bending angle was 6.140°,the blade edge angle was 5°,and the necked-in blade edge angle was 10.752°.At this time,the tillage resistance of the rotary tillage cutter was 1 131.164 N,the torque was 307.758 N·m,and the soil crushing rate was 89.321％.
vertical rotary tillage bladestructural parameterdiscrete element methodresponse surfaceprediction model
万方数据
维普
