Gas Seal Failures Caused by Axial Vibrations
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This case study describes the root cause investigation of 12 dry gas seal failures in three integrally geared centrifugal compressors over a period of 12 years. These compressors are in fuel gas booster service, supplying a 500 MW gas turbine combined cycle power plant. The root cause investigation determined that the dry gas seal failures were the result of a design integration problem in which the rotor-bearing system exposed the dry gas seals to both excessive axial displacement and excessive axial vibrations. These problems were resolved by redesigning the rotor-bearing system to incorporate thrust bearings on the pinion.
Byrne, James; Potter, Patrick; Vazquez, Jose (2018). Gas Seal Failures Caused by Axial Vibrations. Turbomachinery Laboratory, Texas A&M Engineering Experiment Station. Available electronically from