基于SPH法的船式拖拉机叶轮单轮叶驱动性能研究

叶轮是船式拖拉机独特的行走驱动装置,其设计参数对驱动性能和作业效率具有很大影响。为此,以课题组前期研发的HH709S型船式拖拉机叶轮为研究对象,采用光滑粒子流体动力学法,建立了轮叶-土壤的动力学仿真模型,并在此基础上对单轮叶与土壤的作业过程进行了分析。通过分析不同结构参数下单轮叶推进力做功及驱动效率的变化规律,为轮叶结构参数优化设计提供依据。研究结果表明:单轮叶结构优化后最大支撑力减小了3.83%,最大推进力提升了9.66%,推进力做功提升了13.72%,驱动效率提升了20. 35%,驱动性能得到了显著提高。

Driving Performance of the Single Lug for Boat-tractor's Driving Wheel Based on SPH

The lugged driving wheel is the unique walking structure of a boat-tractor,the design parameters of which have significant impacts on the driving performance and working efficiency of boat-tractor.In this paper,the object is the driving wheel of HH709S boat-tractor,and the dynamic simulation model of lug-soil was established based on the smoothed particle hydrodynamics(SPH).Then,the driving performance and working efficiency of the single lug was analyzed.By calculating the driving efficiency and work of pull force of the single lug in different structural parameters,the guide for optimizing the parameters of the lug structure can be obtained.Results showed that the maximum lift force of the single lug reduced by 3.83%,the maximum pull force increased by 9.66%,the working of pull force increased by 13.72%,and the driving efficiency increased by 20.35%,the driving performance was improved significantly.