修形对机车牵引齿轮动态特性影响

摘要

以某机车牵引齿轮传动系统为研究对象,采用有限元方法模拟齿轮实际工况下的啮合状态,根据模型分析结果对齿轮进行修形,确定出齿轮修形的最佳修形量;计算修形前后齿轮系统的时变啮合刚度和接触线长度,计算结果表明二者都是呈周期性变化的,且正相关;建立了齿轮系统动力学数学模型,对比分析了修形前后齿轮系统动态响应,修形后齿轮系统的振动明显降低,说明齿轮传动更平稳,修形效果良好.%Taking a locomotive traction gear transmission system as the research object, finite element method is used to simulate the meshing state of gear under actual working conditions.By modifying the tooth profile according to the results of contact model analysis, the optimal amount of modification is determined.Then, the time-varying meshing stiffness of the gear system and length of contact line are calculated before and after modification.The calculation results show that there are periodic and positive correlation.The dynamic mathematical model of gear system is established, the dynamic meshing performance of the gear system is compared before and after modification, and the vibration of gear system is greafly reduced.It shows that the gear transmission is more stable with good modification effect.