变速器齿轮振动机理及修形减振降噪方法

以某款自动变速器为研究对象,对齿轮振动机理和斜齿轮修形减振降噪方法开展深入研究。采用Simulation X仿真和试验方法,确定对系统振动贡献量最大的齿轮对;采用有限元法进行内部激励详细分析,包含传递误差、接触斑点、啮合冲击和轮齿的热变形;在考虑齿轮温度场影响前提下,以传递误差波动小、消除啮合冲击和齿面接触状态良好为优选目标,经大量仿真结果对比,确定修形方案。修形后试验结果表明,齿轮修形方案可行,改善了齿轮传动状态,有效地减小了变速器的振动噪声。

Transmission gear vibration mechanism and modification method for vibration and noise reduction

This paper discusses the vibration mechanism of gear transmission and modification methods to reduce vibration and noise with a specific automatic transmission as the research object.Using SimulationX and test methods,the gears that have the most contribution to system vibration can be found.The internal excitation of the helical gear was analyzed with the method of finite element simulation,including transmission errors,contact spots,meshing impact and thermo-elastic deformation.Considering the minimum fluctuation amplitude of the transmission errors,meshing impact elimination and the optimal contact status as a comprehensive objective,the optimal gear modification was obtained after comparison with plenty of simulation results.Based on the test results after modification,it is verified that the proposed modification scheme can optimize the transmission status and further effectively reduce the vibration and noise of transmission.