电驱齿轮齿向复合修形设计与仿真分析

Micro Modification Design and Simulation Analysis of Electric Drive Gear Tooth Direction

齿轮副啮合时产生螺旋线偏啮主要由设计因素偏啮分量f_(de)和制造因素偏啮分量f_(ma)引起,单纯应用某一种修形不能完全适应齿轮传动系统复杂的运行工况。根据螺旋线偏啮的时变性和随机性,文中推荐的齿向复合修形方案为:应用齿端修缘消除边缘接触效应和棱边接触,减小偏啮量;应用螺旋线修形对f_(de)进行抵消,以消除或减小f_(de)引起的偏啮量;应用鼓形修形对f_(ma)及f_(de)的变动量进行纠偏,确保齿轮副啮合时各工况下的最大接触载荷始终位于齿宽设定范围内并保持相切接触。将理论分析与工程设计和生产实践相结合,给出了修形参数的数值计算方法,同时结合专业的传动系统仿真分析软件Romax对齿轮修形前和修形后的接触斑和关键性能指标进行对比,以验证文中所推荐的复合修形方案具有良好的适应性和可行性。

The deviation of helix during gear pair meshing is mainly caused by the partial meshing of design factors f_(de)and the partial components of manufacturing factors f_(ma),and the simple application of a certain modification cannot fully adapt to the complex operating conditions of the gear transmission system.According to the time-varying and random nature of helix deflection,the recommended tooth composite modification scheme in this paper is:applying tooth end trimming to eliminate edge contact effect and edge contact,and reducing the amount of deflection.Spiral modification is applied to offset the f_(de)to eliminate or reduce the amount of deflection caused by f_(de);The drum shape modification is used to correct the variation of the f_(ma)and f_(de)to ensure that the maximum contact load under each working condition when the gear pair meshes is always within the set range of the tooth width and maintains tangent contact.Combining theoretical analysis with engineering design and production practice,the numerical calculation method of shape modification parameters is given,and the contact spots and key performance indicators before and after gear modification are compared with the professional transmission system simulation analysis software Romax to verify that the composite modification scheme recommended in this paper has good adaptability and feasibility.