Retrofitting methods and devices for large steam turbines
AssigneeALSTOM Technology Ltd
InventorsSigurd Kubel, Rolf Hunziker
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Abstract
A method of replacing rotating metal blades of a steam turbine inserted into a rotor having one or more existing grooves for inserting root sections of the metal blades is described, the method including the steps of providing replacement blades having radially inwards directed root sections of fiber-reinforced composite material, changing the shape of the one or more grooves in the rotor to form a cavity for the insertion of the root sections of fiber-reinforced composite material and inserting the replacement blades into the rotor.
Claims8
A method of replacing rotating metal blades of a steam turbine inserted into a rotor having at least one existing groove configured to receive root sections of the metal blades, the method comprising:
- providing replacement blades having radially inwards directed root sections of fiber-reinforced composite material;
- changing a shape of the at least one groove in the rotor to provide cavities for the insertion of the root sections of fiber-reinforced composite material;
- and
- inserting the replacement blades into the rotor.
An adapter for replacing rotating metal blades of a steam turbine inserted into a rotor having at least one existing groove configured to receive root sections of the metal blades with replacement blades having radially inwards directed root sections of fiber-reinforced composite material, the adapter comprising at least one section matching at least part of the at least one existing groove for fixing the adapter to the rotor and at least one cavity portion to accommodate the radially inwards directed root sections of fiber-reinforced composite material.
Dependencies are inferred from the claim text.