Effect of Structural Parameters of Plow Body Surface on Tillage Resistance
In response to the problems of high tillage resistance,high energy consumption and poor till-age performance during high-speed operation of the plow in China,this paper investigates the structural parameters of the high-speed plow body surface on tillage resistance.First,the formation process of high-speed plow body surface based on the horizontal straight element line method is analyzed,and the structural parameters that have a great influence on the operational performance of high-speed plow body surface are derived.Then,based on the discrete element method,a dual soil layer structure containing a tillage layer and a plow base layer is established,and the soil properties and the interaction between the plow surface and the soil are characterized by suitable contact relations and contact parameters,and then a high-speed plow surface-soil interaction model is established.The rationality of the high-speed plow body surface-soil interaction model is demonstrated through soil flume tests and simulations of plowing operations.Finally,the influence of structural parameters such as share edge angle θ,guide curve open-ing l,plowshare mounting angle e and height deviation amount △H on tillage resistance are studied re-spectively.The results show that the tillage resistance increases at a faster rate as the angle of the share blade increase;as the opening of the guide curve increases,the tillage resistance decreases gradually;as the ploughshare mounting angle increases,the tillage resistance fluctuates within a small range;the till-age resistance increases slowly as the height deviation increases.The results of this paper can provide a significant reference for the structural optimization design of high-speed plow surfaces.
high-speed plow surfacediscrete element methodhorizontal straight element line meth-odtillage resistance
万方数据
维普
