Why is it important to periodically turn the steam turbine in hot condition? |
Steam turbine must be turned periodically while in hot condition to avoid serious troubles. In hot conditions, rotor of a turbine should not be permitted to remain in stationary condition longer than 3 minutes. The rotor will be bowed or distorted due to the resultant uneven cooling. Rolling with steam or turning with gear or by hand MUST be performed. Hot conditions of turbines referred as: NOTE: Lubrication should be on at all times of rolling or turning operations. |