Process for manufacturing internal corona defenses of large-capacity air-cooled turbogenerator stator bars

Abstract

The invention relates to a process for manufacturing internal corona defenses of large-capacity air-cooled turbogenerator stator bars. The process comprises the following steps: 1) setting a plurality of coupling points within the length of an internal corona defense of a wire bar; 2) calculating the number of coupling points; 3) marking the positions of the coupling points on the narrow surface of the wire bar; 4) using a grinding wheel to rub off strand insulation at the coupling points of the wire bar and marking; 5) matting two sides of an internal anti-corona strip, cutting a conductive putty filler strip and removing isolation film on one side of a conductive putty filler strip; 6) pasting the conductive putty filler strip on the internal anti-corona strip; 7) removing the isolationfilm on the other side of the conductive putty filler strip; 8) pasting the conductive putty filler strip pasted to the internal anti-corona strip on the narrow surface of the wire bar; 9) performing1 / 2 stacked packing by use of a demolding tape to fix the internal anti-corona strip and the conductive putty filler strip; and 10) performing 1 / 3 stacked packing by use of a layer of heat-shrinkablepolyester film and transferring to a linear curing process. The process has the advantages of firm structure, simple operation, stable performance, even resistance and good anti-corona effect.

Description

technical field [0001] The invention relates to a manufacturing process of a stator bar of an air-cooled turbogenerator, in particular to an internal anti-halation manufacturing process of a large-capacity air-cooled turbogenerator stator bar. Background technique [0002] As the voltage level of large-capacity generators is getting higher and higher, the problem of corona is becoming more and more serious. The original internal anti-halation technology is mostly realized by brushing conductive paint on the narrow surface of the wire rod before the insulation of the main package. The disadvantage is that the conductive paint is easy to fall off in the subsequent process, and the anti-halation effect is not ideal. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art and provide an internal anti-halation manufacturing process for large-capacity air-cooled turbogenerator stator bars with simpl...

AI Technical Summary

Problems solved by technology

The original internal anti-halation technology is mostly realized by brushing the conductive paint on the narrow surface of the wire rod before the insulation of the main package. The disadvantage is that the conductive paint is easy to fall off in the subsequent process, and the anti-halation effect is not ideal.