Method for manufacturing a rotor
AssigneeALSTOM Technology Ltd
InventorsRalf ROTZINGER, Sorin KELLER, Jesus CONTRERAS-ESPADA
Life of this patent
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Abstract
A method for manufacturing a rotor by welding a plurality of elements together is described. The elements have a body with cavities and surfaces to be welded to surfaces of adjacent elements. According to the method, the elements are vertically stacked one above the other to form a pile with facing surfaces to be welded together defining slots. The cavities of adjacent elements define bores that extend within the pile. Then, adjacent elements are welded together within the slots. The bore is purged with an inert gas or mixture during welding. The slots are welded at an upper part of the bore before the slots at a lower part of the bore, and a slot at the upper part of the bore is welded last.
Claims16
Method for manufacturing a rotor by welding a plurality of elements (1) together, at least one element (1) having a body (2) with at least one cavity (3) and at least one surface (4, 5) to be welded to a surface (6, 7) of an adjacent element (1), the method comprising:
- stacking the elements (1) vertically one above the other to form a pile (10) with facing surfaces (4, 5, 6, 7) to be welded together defining slots (11), wherein the cavity or cavities (3) of adjacent elements (1) define at least one bore (12) that extends over at least a portion of the pile (10),
- welding adjacent elements (1) together within the slots (11),
- purging the bore (12) with an inert gas or mixture during welding,
- welding the slots (11) at an upper part of the bore (12) before the slots (11) at a lower part of the bore (12), and
- welding at least one of the slots (11) at the upper part of the bore (12) last.
Dependencies are inferred from the claim text.