STRAIGHTENING A ROTOR: THE CAUSES FOR ROTOR MISALIGNMENT IN STEAM TURBINES AND HOW TO TACKLE THIS PROBLEM ON SITE

摘要

One of the problems that might have to be faced when operating steam turbines is shaft inflection, or rotor bowing, a condition that can be either temporary or permanent. Temporary bowing is usually solved with the cooling down of the turbine, so that it does not need further action. Permanent bowing, on the other hand, requires understanding of the underlying root cause and subsequent correction (Figure 1.).