Issue |
Mechanics & Industry
Volume 25, 2024
|
|
---|---|---|
Article Number | 29 | |
Number of page(s) | 15 | |
DOI | https://doi.org/10.1051/meca/2024026 | |
Published online | 25 October 2024 |
Original Article
Vibrations of a dual-rotor system in aero-engine induced by the support misalignment
1
School of Machinery and Automation, Weifang University, 261000 Weifang, China
2
School of Mechanical Engineering, Liaoning University of Technology, 121000 Jinzhou, China
3
Northeast Agricultural University, 150006 Heilongjiang, China
4
China Agricultural University, 100000 Beijing, China
5
Dongfeng Equipment Manufacturing Co., Ltd., 442022 Shiyan, China
* e-mail: xiaoma9203@163.com
Received:
5
March
2024
Accepted:
13
September
2024
In this paper, an analytical model of a rotor-bearing-rotor coupling system is established for aero-engine from the Lagrange equation, based on the dynamics theory of the dual-rotor system and combined with its stiffness, damping, and misalignment characteristics. In the model, the misalignment fault simulation method is introduced. The coupling effect between the low-pressure rotor and high-pressure rotor and the influence of misalignment of the support on low-pressure coupling are considered. The vibration characteristics of the dual-rotor system with the misalignment fault of the low-pressure turbine rear support are studied. The time-domain responses, the frequency spectra, and the shaft-center trajectory of the dual-rotor system with different misalignments are obtained. The influence of unbalance on the vibration characteristics of the low-pressure rotor and the high-pressure rotor with misalignment fault is analyzed. Finally, test verification is carried out by the designed dual-rotor test rig. The experimental results are consistent with the analytical results, confirming the established model's feasibility and simulation method in this paper. The results may provide a theoretical basis for research on the misalignment fault in aero-engine dual-rotor systems.
Key words: Dual-rotor system / misalignment faults / vibration characteristics / theoretical analysis / experiment
© P. Ma et al., Published by EDP Sciences 2024
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.