基于离散元法的船式拖拉机直线驱动性能研究  

Research on Linear Driving Performance of Ship-type Tractor Based on Discrete Element Method

作　　者：张超[1] 瞿兆杰 杨力[1] 周明刚[1] Zhang Chao;Qu Zhaojie;Yang Li;Zhou Minggang(Hubei Agricultural Machinery Engineering Research and Design Institute,Hubei University of Technology,Wuhan 430068,China)

机构地区：[1]湖北工业大学农机工程研究设计院,武汉430068

出　　处：《农机化研究》2023年第2期223-229,235,共8页Journal of Agricultural Mechanization Research

基　　金：湖北省技术创新专项(2017ABA164);湖北省自然科学基金项目(2018CFB281)。

摘　　要：以叶轮直叶片为研究对象,构建了单轮叶—土壤离散元模型,充分校核模型准确性后,分析了轮毂宽度对各个最优参数的影响规律以及叶片在不同速度下叶片长度最优值的变化情况。对实际工况下的叶片结构参数进行优化设计,以单轮叶叶片长度、轮叶厚度、轮叶驱动面倾角、轮叶非驱动面倾角为试验因素,驱动叶轮平均驱动效率为试验指标,进行仿真试验,研究叶轮与土壤相互作用过程中土壤颗粒空间位置的变化、颗粒堆积流动现象、叶轮受力情况以及各个参数的变化对驱动轮驱动性能的影响机理。优化后的最佳结构参数分别为叶片长度240mm、轮叶厚度6mm、轮叶驱动面倾角5°、轮叶非驱动面倾角4°,此时单轮叶的驱动效率最高。This paper takes the straight blade of the impeller as the research object,constructs a single blade-soil discrete element model,and after fully checking the accuracy of the model,analyzes the influence of the hub width on each optimal parameter and the optimal value of the blade length at different speeds.Optimize the design of the blade structure parameters under actual working conditions.Take the length of the single blade blade,the thickness of the blade,the inclination angle of the blade driving surface,and the inclination angle of the non-driving surface of the blade as the test factors,and the average driving efficiency of the driving impeller is Test indicators,conduct simulation tests,study the changes in the spatial position of the soil particles,particle accumulation and flow phenomenon and the force of the impeller during the interaction between the impeller and the soil,to study the influence mechanism of the changes of various parameters on the driving performance of the driving wheel,and the most optimized The best structural parameters are: the blade length is 240 mm,the blade thickness is 6 mm,the blade driving surface inclination angle is 5°,and the blade non-driving surface inclination angle is 4°,the driving efficiency of a single blade is the highest.

关 键 词：船式拖拉机 直面叶轮 驱动性能 离散元法 

分 类 号：S219.81[农业科学—农业机械化工程]