METHOD AND DEVICE FOR REPAIRING THE LIQUID-COOLED ELECTRICAL WINDINGS OF THE STATOR OF AN ELECTRIC GENERATOR
First Claim
1. A method for repairing the liquid-cooled electrical windings of the stator of an electric generator;
- each electrical winding comprising;
a plurality of conductive bars, which are set alongside one another and, at least in part, have channels for conveying the cooling fluid; and
a terminal, which extends along a first axis (A1) and has, on one side, an opening, inserted in which are the ends of the bars and, on the other side, a fitting for hydraulic connection to a connector pipe for supply or discharge of the cooling fluid;
said method comprising the steps of;
a) cutting the terminal into a first portion comprising said opening (8) and a second portion (19) comprising said fitting;
cutting of the terminal generating a cutting surface along the first portion;
b) cleaning the free ends of the bars housed in the first portion;
c) hermetically joining the free ends of the bars to one another and to the first portion;
d) facing the cutting surface; and
e) selectively regulating the position between the first portion and the second portion for re-composing the terminal;
f) induction brazing the second portion to the first portion;
said method being characterized in that at least one of the steps a), d) and e) is performed by means of a repair device, which can be anchored to said first portion.
1 Assignment
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Accused Products
Abstract
A method for repairing the liquid-cooled electrical windings of the stator of an electric generator, in which each electrical winding has a plurality of bars, which are set alongside one another and, in part, have channels for conveying the cooling fluid, and a terminal, which has, on one side, an opening, inserted in which are the ends of the bars and, on the other side, a fitting for connection to a connector pipe for supply or discharge of the cooling fluid, envisages the steps of: a) cutting the terminal into a first portion comprising the opening, and a second portion comprising the fitting, the cut producing a first cutting surface along the first portion; b) cleaning the free ends of the bars housed in the first portion; c) hermetically joining the free ends of the bars to one another and to the first portion via TIG welding in a helium atmosphere; d) facing the first cutting surface; e) selectively regulating the position between the second portion and the first portion for re-composing the terminal; f) induction brazing the second portion to the first portion; and g) performing at least one of the steps a), d) and e) by means of a repair device, which can be anchored to the first portion.
26 Citations
33 Claims
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1. A method for repairing the liquid-cooled electrical windings of the stator of an electric generator;
- each electrical winding comprising;
a plurality of conductive bars, which are set alongside one another and, at least in part, have channels for conveying the cooling fluid; and
a terminal, which extends along a first axis (A1) and has, on one side, an opening, inserted in which are the ends of the bars and, on the other side, a fitting for hydraulic connection to a connector pipe for supply or discharge of the cooling fluid;
said method comprising the steps of;a) cutting the terminal into a first portion comprising said opening (8) and a second portion (19) comprising said fitting;
cutting of the terminal generating a cutting surface along the first portion;b) cleaning the free ends of the bars housed in the first portion; c) hermetically joining the free ends of the bars to one another and to the first portion; d) facing the cutting surface; and e) selectively regulating the position between the first portion and the second portion for re-composing the terminal; f) induction brazing the second portion to the first portion; said method being characterized in that at least one of the steps a), d) and e) is performed by means of a repair device, which can be anchored to said first portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
- each electrical winding comprising;
Specification