J
we have steam turbine 38.5 mw when main control oil pump running which is connected with gear box that time vibration found high in control oil line and vibration reaches up to 120 micron and vibration is cyclic. suddenly it is increase what is reason? control oil pressure 21kg/cm^2 and cyclic sound found in lub oil room near psv. during startup vibration are normal. but when we are taking load dat time it was happened and after FSNL we stopped auxiliary control oil pump which is motor drive
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