Steam Turbine Rotor Shaft Machining - Indonesia
GOLTENS’ MACHINISTS RECTIFY THE DAMAGED SHAFT IN ONLY 4 DAYS
Goltens received an urgent call from a power plant in the city of Gorontalo in Sulawesi. The plant’s 10MW Shandong Jinan steam turbine suffered a bearing failure resulting in a damaged rotor shaft. The power plant is a vital source of power to the city and minimizing downtime was critical.
Steam plant in Gorontalo Sulawesi
Inspection of the damaged rotor shaft journal
Removal of the rotor shaft from the turbine casing
Rigging the rotor shaft to the repair location
Grinding damaged journal surface
Journal finished at 199.5mm
THE REPAIR
Goltens Indonesia immediately deployed one of its In-Place Machining experts to the site. Goltens performed a thorough inspection of the damaged journal inclusive of magnaflux and hardness inspections.
The surface of the 200mm diameter journal was damaged but no deep cracks or irreparable damage was found. Goltens quickly mobilized the required tools to the site along with machining specialists to machine the journal to undersize.
RESULTS
Goltens’ machinists managed to salvage the shaft with the least possible material removal, taking only 0.5mm from the shaft for a finished diameter or 199.5mm. Final polishing and inspection to confirm final measurements were then completed and the plant could get to work restoring the turbine to operation.
Goltens completed this repair in only 4 days on site.
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