Flame brazing process method for stator coil bars and connector plates of power generator

Abstract

The invention discloses a flame brazing process method for stator coil bars and connector plates of a power generator. The flame brazing process method comprises the following steps: removing oxides and pollutants in a brazing area and the surfaces of brazing materials through mechanical cleaning and organic solvent cleaning; wrapping insulation parts of the coil bars with water-soaked fireproof cloths; placing brazing pieces between the end parts of the coil bars and the connector plates, and clamping and fixing the brazing pieces by clamping tools; heating a brazed joint by a double-end welding torch, aligning two air nozzles of the welding torch with the connector plates at the two sides of the joint respectively, adjusting the welding torch to heat by virtue of a flame, enabling the double-end welding torch to move back and forth at a constant speed along the connector plates at the two sides during the heating process, and meanwhile, uniformly heating connection plates at the two sides, starting to fill with brazing wires when an area to be brazed is heat to dark red, and stopping heating after surrounding brazing seams are fully filled; and after the joint is cooled, mechanically removing oxides and redundant brazing materials on the surface of the joint. The flame brazing process method disclosed by the invention is simple, convenient and practicable, high in applicability, and capable of remarkably improving heating efficiency, temperature uniformity and joint brazing quality relative to a conventional flame brazing process.

Description

technical field [0001] The invention relates to a flame brazing process method of a generator stator wire rod and a joint plate. Background technique [0002] Parallel plate connection is a common connection method for the upper and lower stator bars of the generator, that is, the parallel plate is brazed with the end of the bar to realize the bar connection. At present, in the process of manufacturing in the factory and installing on the site, the commonly used brazing methods include intermediate frequency induction brazing and resistance brazing. These two brazing methods require the use of specific brazing equipment and brazing tools, which are greatly limited by the equipment and tools. Due to the characteristics of simple equipment and convenient operation, flame brazing also has a wide range of applications. It is often used in situations where intermediate frequency welding or resistance welding equipment is lacking, such as temporary repairs. Most flame brazing pr...

AI Technical Summary

Problems solved by technology

Most flame brazing processes use conventional torches to heat the joints. Since conventional torches only have one flame nozzle, there are problems such as low heating efficiency, poor temperature uniformity, and poor brazing quality of joints.

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