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Vertical closed iron yoke end ring for transformer and manufacturing method thereof

A transformer and vertical technology, applied in the manufacture of inductors/transformers/magnets, parts of transformers/inductors, coils, etc., can solve problems that affect the electrical performance of the product, the straps cannot be completely densely distributed, and the phenomenon of product cavities, etc. Achieve the effect of high cost performance, shorten the manufacturing period, and avoid local cavities

Active Publication Date: 2022-06-21
常州市英中电气有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The vertical iron yoke end ring has two structures: open type and closed type. The vertical iron yoke end ring is generally fixed on the mold by fixing the cardboard and applying glue layer by layer, and then tightening the cardboard with binding tape. The internal tightening force makes the interlayers bonded effectively. Among them, the vertical open iron yoke end ring can solve the product size problem by applying a mold of similar size, while the vertical closed iron yoke cannot be applied with a mold, and can only be made by custom-made molds. Manufacturing, high cost, long cycle
The existing vertical iron yoke ensures the bonding force between the cardboard layers by binding. The existing technical defects are: because the binding bands cannot be completely densely distributed on the product, the actual force is uneven during binding, and the internal force is uneven during binding. Uneven force will lead to cavity phenomenon inside the product, seriously affecting the electrical performance of the product

Method used

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  • Vertical closed iron yoke end ring for transformer and manufacturing method thereof

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Effect test

Embodiment 1)

[0021] See figure 1 , The vertical closed iron yoke end ring used in the transformer of this embodiment is mainly composed of an outer closed cylinder 1 , an inner cylinder 2 and a glue layer 3 .

[0022] The outer closed tube 1 is a tube-shaped cardboard structure with a circular cross-section.

[0023] The inner layer tube 2 is a structural member formed by bending and butting of cardboard and has a circular cross-section. The inner layer tube 2 is provided with a closed docking port 2-1. The ends are butted; the inner tube 2 is provided with more than 2 layers in the outer closed tube 1 from the outside to the inside.

[0024] The glue layer 3 is arranged between the outer end face of the inner layer cylinder 2 located at the outermost side, the inner end face of the outer layer closed-mouth cylinder 1 and the outer end faces and inner end faces of the two adjacent inner layer cylinders 2, and the outermost inner layer cylinder is connected. 2. It is bonded to the outer c...

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Abstract

The invention provides a vertical closed iron yoke end ring for a transformer and a manufacturing method thereof. The end ring includes an outer closed tube, an inner tube with more than two layers arranged in the outer closed tube, and an inner tube for bonding between layers. layer of glue. The method includes ①calculating the unfolded perimeter of the outer closed tube and each inner tube; ②making the outer closed tube; ③adding 1 mm length cutting to the cardboard of each inner tube on the basis of the theoretically calculated perimeter; ④ Spread the glue layer on the inner end surface of the outer closed tube; ⑤Set the outermost inner tube in the outer closed tube; ⑥In the same way, set the remaining inner tubes sequentially from outside to inside; After the inner layer tube of the first layer is set, a support made of cardboard that is in close contact with the inner wall of the inner layer tube located on the innermost layer is set; ⑧The product is put into the oven for regular drying, and the support made of cardboard is taken out after completion. The invention can reduce the manufacturing cost of the end ring, shorten the manufacturing period and improve the electrical performance of the end ring.

Description

technical field [0001] The invention relates to the technical field of transformer components, in particular to a vertical closed iron yoke end ring for a transformer and a manufacturing method thereof. Background technique [0002] The iron core, the coil (winding) wound on the iron core and the iron yoke fixed on the upper and lower ends of the iron core are the main components of the high-voltage or ultra-high-voltage transformer. For purposes such as insulation distance between ends, iron yoke end rings must be used to isolate the upper and lower ends of the coil. There are two types of iron yoke end rings commonly used at present, one is a flat iron yoke end ring made of paper ring bonding pads, and the other is a vertical iron yoke end ring made of multiple sheets of cardboard bonded together. The vertical iron yoke end ring has two structures: open type and closed type. The vertical iron yoke end ring is generally made by fixing the cardboard on the mold and applying...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F27/32H01F41/12
CPCH01F27/324H01F27/327H01F41/125H01F41/127
Inventor 李洪刘乾蒋志锋陈志平
Owner 常州市英中电气有限公司
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