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US 8,789,260 B2Granted
Method for manufacturing a rotor for a generator
AssigneeSiemens Aktiengesellschaft
InventorHenrik Stiesdal
Life of this patent
Estimating the term…
Abstract
A method for manufacturing a rotor for a generator is provided. In accordance with this method, a metal plate is rolled to a circumferentially open circular cylinder having two free ends, the circumferentially open cylinder having an inner diameter smaller than a desired end inner diameter of the rotor. The two free ends of the rolled metal plate are then welded to form a closed cylinder. The closed cylinder is rolled to obtain the desired end diameter of the rotor.
Claims10
A method for manufacturing a rotor for a generator comprising:
- rolling a metal plate to a circumferentially open circular cylinder comprising two free ends, the circumferentially open cylinder having an inner diameter smaller than a desired end inner diameter of the rotor;
- welding the two free ends of the rolled metal plate to form a closed cylinder;
- hot rolling the closed cylinder to a diameter that exceeds the desired end diameter;
- and
- controlled cooling of the closed cylinder responsive to a coefficient of thermal expansion of the closed cylinder to obtain the desired end diameter of the rotor, utilizing an apparatus comprising:
- a plurality rolls adapted for rolling a metal plate to a circumferentially open circular cylinder comprising two free ends, the circumferentially open cylinder having an inner diameter smaller than a desired end inner diameter of the rotor, and
- a welding device for welding the two free ends of the rolled metal plate to form a closed cylinder;
- a heating device for hot rolling the closed cylinder to a diameter that exceeds the desired end inner diameter of the rotor;
- and
- a cooling device for controlled cooling of the closed cylinder responsive to a coefficient of thermal expansion of the closed cylinder to obtain the desired end diameter of the rotor.
7 more elements
Dependencies are inferred from the claim text.