Large Vibrations on a Centrifugal Compressor Caused by High Windage Heating on a Flexible Coupling–Root Cause Analysis and Solutions
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Background: 2 parallel trains consisting of a Low Pressure (LPC) and High Pressure (HPC) compressors were supplied for an offshore reinjection application near the coast of Angola. During the commissioning on site large lateral vibrations were observed at both units on the Bearings “Drive-End”of the Pinion and “Drive-End”of the LPC. Several balancing runs of the trains on site were necessary to operate both units and allow for injection gas. To avoid repeated field balancing (if coupling or rotor must be removed/reinstalled during future maintenance) the coupling and oil system needed to be re-designed.
Bidaut, Yves; Baumann, Urs (2011). Large Vibrations on a Centrifugal Compressor Caused by High Windage Heating on a Flexible Coupling–Root Cause Analysis and Solutions. Turbomachinery Laboratory, Texas A&M Engineering Experiment Station. Available electronically from