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Understanding Design Parameters That Affect Thermal Stability of High-Speed Turbo Machinery (Also Known As the Morton Effect)
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
At present, there are no commercially available codes in industry that have proven to reliably predict a rotors sensitivity to the Morton Effect. The Morton Effect refers to synchronous rotor instability due to non-uniform ...
Impeller High cycle fatigue failure on a Natural Gas Pipeline Compressor Following Choked Flow Operation
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
The impeller of a natural gas pipeline compressor failed at the junction between the blade trailing edge and the hub.
A root cause analysis showed the machine had been operated beyond the compressor map right limit during ...
Steam Turbine Reoccurring Rubs, Troubleshooting and Corrective Action
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
Rubs in steam turbines can be especially difficult to diagnose because the vibration signature can manifest differently depending on the location, severity, rotordynamics, machine design and bear similarities to other ...
High Vibration Due to Steam Turbine Deposits
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
This presentation provides a case study how to correctly deal with increased vibration on a steam turbine that drives a compressor. After the machine had not operated for a week, vibration level increased 5 times during ...
Preventing a Major Wreck on a New Reciprocating Compressor: The importance of commissioning testing
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
During commissioning testing of three new reciprocating compressors a fault was detected requiring the testing to be stopped. Debris was found in the bearing resulting in minor damage due to the early indication from the ...
Case Study on investigation and resolution of Dry Gas Secondary Seal Failure
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
Dry Gas (DGS) Secondary Seal installed on one of the Flash gas compressor unit at an onshore gas treatment facility failed resulting in equipment downtime and process gas flaring. During detailed tear down inspection, ...
Resolution of high vibration on a Generator
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
This is a synchronous generator driven by a GT through a speed reduction gearbox with a rated power of 25 MW(3600 rpm).
Generator bearing high vibration levels resulted in several machine trips during the startup attempt ...
Dry Gas Seal Failure due to Axial Sub-synchronous Vibration on a Hydrogen Recycle Gas Compressor.
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
Approximately 6 months after commissioning a new hydrotreater hydrogen recycle gas compressor the site experienced a dry gas seal failure. The investigation revealed wear of the primary seal dynamic sealing element due to ...
Stray Currents and their Damaging Effects on Rotating Machinery
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
Stray currents manifest in rotating machinery as a result of specific abnormalities in machines related to flux imbalance, residual magnetism, electrostatic build-up and induced voltages. Discharges of these voltages in ...
Compressor Dry Gas Seal Failure Due To Oil Ingress
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
This case study of a typical tandem arrangement dry gas seal failure during compressor start-up elaborates importance of start-up environment consideration during design for a compressor dry gas seal system. The seal failed ...