Large Steam Turbine Vibration Resonance of Pedestal and Linkage System RCA, Detail Vibration Investigation/Measurement at Site and Countermeasures
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A Large Steam Turbine had been in operation for several years and this turbine experienced the wear damage of governor linkage. Then, measured the vibration velocity profile on Governor side pedestal to identify the excited vibration mode and frequency. According to collected data, investigated the possible root causes and conducted 3D vibration response analysis to the existing and the improved pedestal. And, improved pedestal was supplied to the client and applied for actual machine during turnaround. And, finally, the advantage of new improved pedestal was confirmed. This case study introduces the typical phenomena, RCA investigation, detail vibration analysis, countermeasures and verification results as technical process.
Katagake, Makoto; Ikeno, Kyoichi (2015). Large Steam Turbine Vibration Resonance of Pedestal and Linkage System RCA, Detail Vibration Investigation/Measurement at Site and Countermeasures. Turbomachinery Laboratory, Texas A&M Engineering Experiment Station. Available electronically from