Solving a Coupling Unbalance Problem in the Field
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When a large (3.4 meters long) diaphragm coupling was suspected of causing excessive (120 microns p-p) 1X unbalance vibration between a 90+ Megawatt Gas Turbine and a Propane Compressor in an LNG plant, there was not time to ship the coupling back to a distant factory or service center for troubleshooting. Simple field diagnostic techniques were used to discover the problem, which then led to a field correction and repair so that the unit was able to be quickly restarted with minimum downtime.
Shatri, Quraisy; Corcoran, Joseph (2013). Solving a Coupling Unbalance Problem in the Field. Turbomachinery Laboratory, Texas A&M Engineering Experiment Station. Available electronically from