Nonlinear tribo-dynamic model and experimental verification of a spur gear drive under loss-of-lubrication condition
Nonlinear tribo-dynamic model and experimental verification of a spur gear drive under loss-of-lubrication condition
复制标题
DOI：
10.1016/j.ymssp.2020.107509
复制
发表时间：
2021-05-15
影响因子：
8.4
通讯作者：
Chen, Siyu
中科院分区：
文献类型：
--
作者：
Hu, Bo;Zhou, Changjiang;Chen, Siyu
在直升机设计中，当齿轮传动装置由于战斗损坏而失去润滑时，要求齿轮箱工作>= 30 min以提高生存能力。在这种失润滑条件下，轮齿摩擦、磨损和温度对齿轮的动态性能造成严重影响。因此，建立了直齿圆柱齿轮传动的非线性摩擦动力学模型，并进行了实验验证。基于计算逆技术，预测了失润滑条件下的时变摩擦系数。采用热网络模型和动态磨损模型，计算了摩擦引起的温升和磨损量。齿轮轴的柔性和齿轮转子的陀螺效应也被考虑。结果表明，陀螺效应对齿轮传动的固有频率有明显的影响，而摩擦对固有频率的影响很小，但对非线性行为有很大的影响。温度和陀螺效应对非线性行为的影响主要体现在中高速区域，而轮齿磨损主要影响中速区域的分叉。此外，轮齿磨损不仅加剧了齿轮的振动，而且改变了动态传动误差的相位。分析和实验结果对减少摩擦磨损、抑制非线性行为、降低振动和噪声具有重要的参考价值。(C)2020爱思唯尔有限公司保留所有权利。
Gearbox is required to serve for >= 30 min in helicopter design to improve survivability, when the gear drive loses lubrication due to battle damage. Under such loss-of-lubrication condition, tooth friction, wear and temperature pose serious problems to dynamic performance of gears. Therefore, a nonlinear tribo-dynamic model of spur gear drives is established and experimentally validated in this work. The time-varying friction coefficient is predicted under loss-of-lubrication condition on the basis of computational inverse technique. The temperature rise and tooth wear caused by friction were included by using thermal network model and dynamic wear model. The flexibility of gear shafts and the gyroscopic effect of gear rotors are also considered. The results indicate the gyroscopic effect apparently affects the natural frequency of the gear drive, while friction has negligible effect on the natural frequency but has considerable effect on the nonlinear behavior. The influence of temperature and gyroscopic effect on nonlinear behavior are reflected in the region of middle and high speed, while tooth wear mainly affects the bifurcation at the middle speed. In addition, tooth wear not only aggravates gear vibration but also can change the phase of dynamic transmission error. The analysis and experiment results can be an important reference in reducing friction and wear, restraining nonlinear behavior, and reducing vibration and noise. (C) 2020 Elsevier Ltd. All rights reserved.