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Dynamic Thermal Behavior of Two-Stage Gear Transmission System
Journal of Vibration Engineering & Technologies ( IF 2.7 ) Pub Date : 2021-06-02 , DOI: 10.1007/s42417-021-00329-3
Shuai Qiao , Jianxing Zhou , Xiangfeng Zhang , Hong Jiang , Yuan Shao , Yong Shen , Chenglong Wang

Purpose

Thermal behavior is vital for the stability of the gear system, especially at high speed and heavy load. This paper establishes a gear-shaft-bearing coupling system dynamic model, considering the time-varying stiffness of gears and bearings. On this basis, an analysis method for the heat transfer and temperature field of the system is proposed.

Methods

The dynamic load and vibration displacement are first solved to determine the amount of heat flux generated by friction during system operation. This heat flux is then considered as a thermal load to perform a thermal analysis of a finite element model of the transmission system, and the validity of the model is verified by experiments. Finally, the effect of the dynamic characteristics on thermal behavior is studied.

Results and Conclusion

The temperature response of the transmission system considering the dynamic characteristics is quite different from that under normal working conditions. The heat transfer rate is accelerated, and the temperature response increases sharply when the system is in torsional resonance. Moreover, the adjustment of the gear position can effectively improve the high-temperature response, while the bending resonance of the shaft has little effect on the thermal behavior.



中文翻译:

两级齿轮传动系统的动态热行为

目的

热行为对于齿轮系统的稳定性至关重要,尤其是在高速和重载时。本文建立了齿轮-轴-轴承耦合系统动力学模型,考虑了齿轮和轴承的时变刚度。在此基础上,提出了系统传热和温度场的分析方法。

方法

首先求解动态载荷和振动位移,以确定系统运行过程中摩擦产生的热通量。然后将此热通量视为热载荷以对传输系统的有限元模型进行热分析,并通过实验验证模型的有效性。最后,研究了动态特性对热行为的影响。

结果和结论

考虑动态特性的传动系统的温度响应与正常工作条件下的温度响应有很大不同。当系统处于扭转共振时,传热速率加快,温度响应急剧增加。此外,齿轮位置的调整可以有效改善高温响应,而轴的弯曲共振对热行为影响很小。

更新日期:2021-06-02
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