Non-repair Approaches to Solve Vibration and Over temperature Problems of Large Turbine Bearing
In allusion to a200MW steam turbine in which vibration and overtemperature problems of low pressure turbine bearings occurred after its overhaul and increment of the bearing collar diameter,the rubbing vibration was controlled by means of cutting the rotor excition force and abjusting the operation con dition.Based on the results of lube flow testing and lu brication theory analysis of the bearings,a project to process a circumferential notch in every upper bearing problem of the bearing overtemperature has been solved.These non-repair approaches can manage to escape enor mous ex pense from long-term maintenance outage.