US. Power Gen – General Electric Frame 5 Gas Turbine Internal Alignment

The General Electric Frame 5 gas turbine was brought down by an unscheduled outage. The turbine was experiencing a rub on the rotor and buckets along the compressor casings. From these issues, it was determined that a gas turbine internal alignment was needed to return the unit to its optimal operating conditions. The turbine was an outside unit, which required the work to be done on a small time window in the early hours of the morning in order to avoid any thermal expansion caused by the sun. The unit was located on a large power barge off the coast of Brooklyn NY. This required the implementation of a measurement system that was able to account for the vibrations created by the wake of passing boats. The underlying factors required the work to be done using a laser alignment system.