Method for binding iron cores of transformer with wound stereoscopic triangular iron core before annealing

Abstract

The invention discloses a method for binding iron cores of a transformer with a wound stereoscopic triangular iron core before annealing. The wound stereoscopic triangular iron core is formed by combining three wound iron core sheets. The method includes: splicing the three wound iron core sheets into a stereoscopic triangular structure by arranging the same on a platform, and respectively arranging auxiliary round support steel at an outer triangular zone at the joint of the iron core sheets so as to prevent deformation during binding; binding three core limbs through a steel binding tape packing machine, and firstly binding internal steel binding tapes, aligning various contact surface edges and connecting seamlessly; then binding external steel binding tapes after the internal steel binding tapes in the three core limbs are all bound, and further firmly binding the iron core sheets into an integral stereoscopic triangular iron core. By the method, defects of collapse, deformation and waves and the like are avoided after annealing, and success rate of iron core production is greatly increased.

Description

technical field [0001] The invention relates to a transformer iron core, in particular to a binding method for a three-dimensional triangular wound iron core transformer iron core before annealing. Background technique [0002] As a new type of distribution transformer, the three-dimensional wound core transformer has become a trend of distribution transformers due to its double energy-saving advantages. As the core iron core of the three-dimensional wound core transformer, the manufacturing technology is the most complicated. Due to the stretching and bending of the iron core during the winding process, the grain orientation of the silicon steel sheet is destroyed, which needs to be restored by annealing the iron core to meet the loss requirement. However, the maximum temperature of the iron core during the annealing process reaches more than 800 degrees. At this time, if the rolled iron core is not bound firmly by appropriate methods, the iron core is prone to defects suc...

AI Technical Summary

Problems solved by technology

However, the highest temperature of the iron core during the annealing process reaches more than 800 degrees. At this time, if the rolled iron core is not bound firmly by appropriate methods, the iron core is prone to defects such as collapse, deformation, and waves, which will cause the iron core to be unusable and scrapped.

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