11th International Conference on Damage Assessment of Structures | |
Vibration damage mechanism analysis on rotor of diesel generating set with rigid coupling | |
物理学;材料科学 | |
Yan, Bing^1,2 ; Shi, Weizhen^1 ; Hua, Chunrong^1 ; Liu, Jingming^1 ; Dong, Dawei^1 ; Chen, Jun^1 | |
College of Mechanical Engineering, Southwest Jiaotong University, China^1 | |
No. 111. North 1 st Section of Second Ring Road, Chengdu, Sichuan Province, China^2 | |
关键词: Damage mechanism; Generator rotors; Gyration radii; Linear vibrations; Mechanical damages; Torsional vibration; Vibration level; Vibration velocity; | |
Others : https://iopscience.iop.org/article/10.1088/1742-6596/628/1/012071/pdf DOI : 10.1088/1742-6596/628/1/012071 |
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学科分类:材料科学(综合) | |
来源: IOP | |
【 摘 要 】
The crankshaft output end is generally connected with generator rotor through the coupling in diesel generating set. When using rigid coupling, the attachments and connecting parts of generator rotor (especially at larger gyration radius) are vulnerable to fatigue damage even if the vibration level of the generating set does not exceed the acceptable "usual value". In order to investigate the reasons, the torsional vibration of the rotor in the diesel generating set was calculated and measured in this paper, which shows that using high rigidity coupling would result in large torsional vibration on the generator rotor, and that the linear vibration (the tangential vibration) value induced by torsional vibration at larger gyration radius of generator motor is almost the same as the vibration level of the generating set. Then, the vibration level of generating set was obtained, and the maximum vibration velocities of the generator are below the permissible value regulated by ISO 8528-9. But the velocities of synthetic vibration of the generating set vibration and the linear vibration induced by torsional vibration at larger gyration radius are much higher than permissible value 2(28mm/s) regulated by ISO 8528-9, which may be the reason of the mechanical damage of the attachments and connecting parts at larger gyration radius of generator motor caused by exceeded vibration.
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Vibration damage mechanism analysis on rotor of diesel generating set with rigid coupling | 1420KB | download |