METHOD OF STRAIGHTENING ROTORS OF STEAM AND GAS TURBINES Russian patent published in 1997 - IPC

FIELD: manufacture of turbines; straightening rotors of gas and steam turbines in case of inadmissible residual bend in course of operation. SUBSTANCE: method is based on relaxation of stresses at high temperature under action of straightening load. Centrifugal forces of one or several correcting weights mounted in turbine rotor are used as straightening load. To attain high temperature, use is made of operating conditions at nominal power; mass of correcting weights is so selected that straightening procedure takes place during period of time coinciding with scheduled stop of turbine for maintenance. EFFECT: enhanced efficiency.