轮齿弹性变形对变速箱动态特性影响研究

Study on the Influence of Gear Elastic Deformation on the Dynamic Characteristic of Transmission

基于机械动力学理论,研究了轮齿受载后弹性变形对变速箱动态特性的影响。首先,通过提取壳体刚度矩阵、质量矩阵和节点位置信息,将其与传动部件虚拟装配,建立了变速箱动态分析模型。然后,通过计算因轮齿弹性变形而导致的啮合错位量、传递误差及齿面接触情况,分析了轮齿变形对齿轮副啮合质量及变速箱动态特性的影响。最后,依据弹性力学理论,通过对啮合齿轮副修形,提高了齿轮啮合质量,降低了齿轮副受载后的动态响应。文中分析结果可为有效减小轮齿弹性变形,改善变速箱动态性能提供借鉴。

Based on the theory of mechanical dynamics,the influence on dynamic characteristic of transmission is researched when the tooth generated elastic deformation under load.First,in order to build the transmission dynamic analysis model,the stiffness matrix,mass matrix and node positions information of the transmission box are extracted and combined with transmission part virtual assembly.Then,the mesh misalignment,transmission error and tooth contact condition caused by elastic deformation of tooth are calculated.The effect of tooth elastic deformation on meshing quality of gear pair and dynamic characteristic of transmission are analyzed.Finally,according to the theory of elastic-mechanics,the meshing quality is improved through modification of tooth profiles to achieve the purpose of decreasing the dynamic response of gear pair under load.These results provide references for reducing the elastic deformation of tooth effectively and improving the dynamic characteristic of transmission.