Research, analysis and optimization of the drive characteristics of the drive wheel of the machine tiller based on SPH method

The boat tiller (machine tiller) uses the floating working principle to make the hull and drive wheel bear the general tractor drive wheel load and drive two functions, respectively, so that it has good applicability in the operation of deep muddy foot water field, which greatly improves the tillage efficiency of China’s water field farming. The drive wheel is an important component of the machine tillage boat; its structural parameters have a significant impact on the driving performance and efficiency of the machine tillage boat. In this paper, combined with the kinetic analysis of the drive wheel, a single-wheel leaf-soil smooth particle hydrodynamic model of the drive wheel is constructed based on the SPH method, and the influence of the parameters of the wheel spurs of the drive wheel unit group on the driving performance is analyzed, and the drive wheel mechanism parameters with the best driving efficiency are finally obtained through simulation analysis. The research results show that the maximum propulsive force of the optimized single-wheel blade structure increases by 35.8% compared with that before optimization, the slip rate decreases by 3.9% compared with that before optimization, and the driving efficiency increases by 14.4% compared with that before optimization. The structural design and parameter selection of the drive wheel of the research results of this paper provides a certain theoretical basis, which is of great significance to the later improvement of the drive efficiency and performance of the drive wheel of the machine tiller in paddy soil.