A campaign of vibration analyses was performed on three compressor trains, each consists of an electric motor, a gear box and a centrifugal compressor, during their start-up after overhaul activities. High vibration levels were detected on two centrifugal compressors and two gear boxes. These vibration levels were close to the alarm thresholds defined by the manufacturer to operate the compressor trains in safety conditions. In order to fix these rotordynamic issues, and avoid unexpected unit shut down, trim balance activities were performed on the compressor trains.
opus automazione carried out a campaign of measurements with a portable vibration analyzer connected to the vibration probes (no-contact and seismic) installed on the machines. In particular the following activities were performed:
The activities were carried out in collaboration with the Customer’s technicians. At the operation conclusion the train vibration levels were widely below the alarm levels for all trains. It this conditions it was possible to put the three compressor trains in normal production running in safety conditions.