人字齿功率分流轮系均载仿真研究

Simulation Study of Load Sharing of the Herringbone Power Split Gear Train

均载设计技术是人字齿轮功率分流轮系发挥构型优势的关键技术。为提高人字齿功率分流轮系的均载特性,构建考虑支承刚度、扭转刚度以及齿轮副啮合刚度的静力学模型,剖析出在误差及载荷作用下影响均载特性的主要因素;利用Romax软件建立了含浮动构件、柔性构件、人字齿等结构特征并同时考虑误差、传动系统变形的有限元仿真模型,求解了传动系统的均载系数;研究了偏心误差、同步角、弹性轴扭转刚度、人字齿对称度误差等因素单独作用对均载特性的影响规律,基于正交试验法获得了多因素交互作用对均载特性的影响规律和显著性程度。结果表明,同步角和人字齿对称度误差对均载特性影响显著,弹性轴扭转刚度对均载特性影响次之,偏心误差对均载特性有一定影响。为获得较优的均载特性,设计中应采用较小的弹性轴扭转刚度;传动轴与齿轮连接花键套需采用参数匹配的设计方法,以获得较小的同步角。

The load sharing design is a crucial technology that leverages the configuration advantages of the herringbone power split gear train.To improve the load sharing characteristics of the herringbone power split gear train,a static model that accounts for support stiffness,torsional stiffness,and gear mesh stiffness is construceted.The main factors affecting load sharing characteristics under the influence of errors and varying loads are analyzed.By using Romax software,a finite element simulation model consideres structural features like floating components,flexible elements,and herringbone gears,as well as errors and transmission system deformations,and load sharing coefficients are determined.The isolated impact of factors such as eccentricity error,synchronization angle,elastic shaft torsional stiffness,and herringbone gear symmetry error on load sharing characteristics is examined.Furthermore,utilizing the orthogonal experimental method,the interaction patterns and significance levels of these factors on load sharing characteristics are uncovered.The results show that synchronization angle and herringbone gear symmetry error significantly affect load sharing characteristics,with elastic shaft torsional stiffness being the next most influential factor,and eccentricity error having a noticeable impact.To achieve superior load sharing characteristics,it is recommended to use lower elastic shaft torsional stiffness in design,and employ parameter-matching design methods for the connection between the transmission shaft and gear keyway to reduce synchronization angles.