Abstract:

A few days after the operation of a cogeneration steam turbine generator set in a power plant, there was abnormal generator vibration, which would reduce the operation load and affect the safety, stable operation and economic benefits of the units. Through the vibration diagnosis analysis, it was found that the vibration abnormality was caused by the misalignment of rotor and the inadequate contact area of the generator foot gasket. After realigning and replacing the gasket of appropriate size, the vibration of the generator set is abated, which would avoid furtherdeterioration of the problem and would effectively ensures the safe operation of the equipment.

Key words:

cogeneration, vibration diagnosis, spectrum analysis, adjustment gasket