During the first start-up process after the heating renovation of the Hulan-Ergi 200MW unit,there was a significant vibration of the shaft system after the LP exhaust steam spray was put into operation.By analyzing the stability of the units shaft system and simulating the deformation of the cylinder,it was determined that the fundamental cause of vibration was the mismatch between the LP exhaust water spray position of the original unit and the modified structure.The LP exhaust steam spray directly washes the steam seal,causing a sudden change in its temperature field and causing significant deformation,resulting in dynamic and static friction of the unit and causing shaft vibration.Aiming at the causes of the event and the actual situation of the unit,solutions and operational suggestions were proposed to solve the vibration problem of the unit,in order to provide reference for preventing similar problems in the heating renovation of similar units.
万方数据
维普
