Due to high vibration leading to severe bearing and shaft damage from 29.05.2012 to 19.09.2012. ID Fan-6A Inlet Guide vane found dislodged from the operating power cylinder.
Unit#6 (STPS, Santaldih, Purulia) tripped at 9:50 Hrs on 29thMay’12 through MFT(Furnace Pr. V. High)due to failure of ID fan 6A with high bearing vibrations (DE : 19.9mm/Sec).
After inspection, ID Fan-6A Inlet Guide vane found dislodged from the operating power cylinder. Severe damage in both end bearings and housings (broken), associated oil and water supply lines, hydraulic scoop tube was noticed.
Shaft runner was found sheared at the middle with runner-impeller assembly got lowered to the casing volute.