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Vibration Analysis and Balancing on Compression Trains

Global projects
ClientGlobal projectsYearJanuary, 2023AuthorNick JonesShare
- Case Study -

Vibration Analysis and Rotor Dynamic Balancing Campaign on Compression Trains

Vista di compressore industriale e tubazioni durante analisi vibrazioni treni di compressione

Issue Identified:

During the plant restart phase following a scheduled maintenance shutdown, high vibration levels were detected on two centrifugal compressors and two gearboxes across three compression trains, each consisting of an electric motor, gearbox, and centrifugal compressor.

The recorded vibrations were near the critical alarm thresholds defined by the manufacturer, compromising safe operation and threatening production continuity.
To avoid unexpected shutdowns and ensure stable performance, a rotor dynamic balancing (trim balance) intervention was required.

Solution:

The Opus Automazione technical team performed an on-site vibration analysis campaign using a portable analyzer connected to the vibration probes installed on the units (non-contact and seismic probes).
Key activities included:

  • Rotor dynamic analysis of the trains during post-maintenance startup

  • Identification of critical components with vibration levels exceeding thresholds

  • Calculation of balancing masses and definition of optimal installation positions on coupling flanges

  • Application and fine-tuning of masses, dynamically adjusted based on observed rotor behavior

  • Final evaluation of vibration condition to confirm full efficiency and stability of the units

The intervention was carried out in close collaboration with the client’s technicians, ensuring a customized, effective, and fast solution.

Schermata di oscilloscopio con grafici vibrazionali per analisi rotordinamica

Results Achieved:

  1. Vibration levels restored below critical thresholds:
    All three compression trains were returned to optimal vibration levels, well within alarm limits

  2. Operational safety ensured:
    The intervention enabled a safe plant restart, preventing failures and optimizing production

  3. Effective technical collaboration:
    The joint approach between Opus and client technicians ensured efficient execution and a tailored solution


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