Vibration fluctuations at the motor drive end of Siemens

2025-06-27View Original

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As shown in the figure below: After replacing the shaft bearings of the 10,000V 12,000KW Siemens motor, vibration at the drive end exhibited fluctuation patterns as indicated by the curve. But there is actually no anomaly. Vibration acquisition uses a 3500 Bently system. The cause of the fluctuations is unknown; both oil temperature and pressure are normal. It’s not a continuous fluctuation; instead, there are fluctuations over a period of time as shown in Figures 1 and 2, after which it returns to a stable state as shown in Figure 4. I would appreciate it if fellow netizens could help identify any possible issues.

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Vibration fluctuations at the motor drive end of Siemens

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