In trial operation of 1036 MW unit no2 in Huaneng Haimen Power Plant

the oil film whirling

impact-rubbing between movable and stationary parts

steam flow excited vibration

as well as shaft vibration of generator's rotor exceeding the set standard etc.have successively appeared

the detailed diagnosis process and disposal measures being presented.The suddenly appeared low-frequency vibration of MP rotor is due to oil film whirling

the thermal bending of rotor resulted from impact-rubbing between movable and stationary parts is also the cause leading to increase of the vibration amplitude for MP rotor;the vibration of generator's rotor is resulted from impact-rubbing between the shaft-neck of rotor and the floating oil retainer

as well as unsmooth jamming between them.The adopted diagnosis and fault-disposing measures have reference value for vibration fault disposal on similar kind of untis.