关键词: 农业机械, 棉田土壤, 仿生犁体, 离散元, 抗黏减阻

Abstract: In view of the problems of easy adhesion, high resistance and high energy consumption of the current moldboard plough in the process of cotton field soil ploughing, this research was based on two typical cotton field soils. Taking the plough body, cotton field soil and the interaction between them as the research object, a method combining the optimization of plough surface model and bionic surface structure was proposed. Taking the scale triangular arc structure of pangolin body surface and the convex hull structure of dung beetle body surface as the bionic prototype, a bionic desorption drag reduction plough body in cotton field was developed. The physical and chemical properties of two kinds of cotton soil were measured and the discrete element model was established. The simulation comparison test of tillage resistance between traditional plough and bionic plough was carried out. In No.1 soil sample, the bionic plough reduced the resistance by 5.4% compared with the traditional plough, and the soil viscosity reduction performance increased by 44.15%. In No.2 soil sample, the bionic plough reduced the resistance by 7.8% compared with the traditional plough, and the soil viscosity reduction performance was improved by 45.49%. The research results showed that the bionic plough had an obvious effect on reducing the viscosity and resistance of cotton soil.

Key words: agricultural machinery, cotton soil, bionic plough, discrete element method, viscosity resistance and drag reduction