Study on load sharing behavior of coupling gear-rotor-bearing system of GTF aero-engine based on multi-support of rotors

Study on load sharing behavior of coupling gear-rotor-bearing system of GTF aero-engine based on multi-support of rotors
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基于转子多支撑的GTF航空发动机齿轮-转子-轴承耦合系统均载特性研究

DOI:
10.1016/j.mechmachtheory.2019.103764
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发表时间:
2020-05
影响因子:
5.2
通讯作者:
JinFeng
JinFeng
中科院分区:
工程技术1区
文献类型:
--
作者:
Siyu Wang;Rupeng Zhu;JinFeng

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基于GTF(齿轮传动涡扇发动机)齿轮箱低压转子和风扇转子的多支撑方式,建立齿轮-转子-轴承耦合动力学模型。我们探索并量化了两个转子上的轴承对 GTF 传动系统动态行为的影响,特别是两个转子上的轴承位置对 GTF 变速箱中星形齿轮系统的负载分配行为的影响。动力学模型中包含了双斜齿轮的轴向、横向和旋转运动,其中充分考虑了轴承时变支撑刚度、具有多个啮合间相位关系的齿轮啮合刚度以及综合误差。结果表明,两个转子上的轴承位置会影响GTF齿轮箱星形齿轮系统中的载荷分配性能和最大浮动量,因此,可以重新布置转子上的轴承位置,以实现更好的系统振动控制和载荷分配性能。
Based on the multi-support mode of low-pressure rotor and fan rotor of gearbox in GTF (Geared turbofan engine), the coupling gear-rotor-bearing dynamics model is established in this paper. The effect of bearings on both rotors on the dynamic behavior of the GTF transmission system have been explored and quantified, especially for the influence of location of bearings on both rotors on the load sharing behavior of the star gearing system in GTF gearbox. Axial, transverse and rotational motions of double-helical gears are included in the dynamic model, in which the time-varying support stiffness of bearings, the gear mesh stiffness with phase relationship between multiple meshes and comprehensive errors are fully considered. The results show that position of bearings on both rotors could affect the load sharing performance and maximum floating amounts of members in star gearing system of GTF gearbox, therefore, the location of bearings on rotors can be rearranged to achieve better performance in vibration control and load distribution of the system.
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