双输入圆柱齿轮动力分流传动系统的静力学均载特性研究

Study on Statics Load Sharing Characteristic of Power Split Transmission System of Double Input Cylindrical Gear

针对双输入圆柱齿轮动力分流传动系统,建立了传动系统的静力学分析模型,模型中考虑了齿轮副的啮合变形、齿轮中心的横向变形、双联齿轮轴的扭转变形、齿轮安装误差和支撑刚度等因素。根据传动系统的力矩和力平衡条件,以及其闭环结构的变形协调条件,建立了系统的静力学平衡方程,求解了系统各分支双联齿轮轴的转矩及各分支均载系数,获得了安装误差、安装角、双联齿轮轴扭转刚度对系统均载系数的影响规律。研究结果表明,误差具有累加作用,各误差综合作用时系统均载系数显著增大,并车级齿轮安装误差对系统均载性能的影响大于分扭级;在该组参数条件下,两输入安装角为166°左右时,系统左右输入均载系数相等;降低双联齿轮轴扭转刚度有助于提高系统均载性能,合理配置分扭级安装角和双联齿轮轴扭转刚度差值有利于进一步改善均载性能。

A statics analysis model of the transmission system is established for the power split- torque transmission system of double input cylindrical gear,the factors of the meshing deformation of the gear pair,lateral deformation of a gear centre,duplicate gear shaft torsional deformation,gear installation error and support stiffness are considered in the model. According to the equilibrium conditions of force and moment,and the characteristic of the closed loop structure,the deformation coordination condition of the system,the statics equilibrium equation of the system is established and the branch load sharing coefficients are obtained. At the same time,the effects of the installation error,installation angle,duplicate gear shaft torsional stiffness on the load sharing coefficient are investigated. The results show that the error has a cumulative effect and the load sharing coefficient increases significantly when the error is increased,and the effect of errors of synthesized torque stages on load sharing coefficient is more than split torque stages. In this set of parameters,the load sharing coefficient is equal when input installation angle is about 166°. Reducing the duplicate gear shaft torsional stiffness is helpful to improve the load sharing performance. Furthermore,rational allocation installation angle of split torque stages and difference of duplicate gear shaft torsional stiffness are conducive to further improve the load sharing performance.