CN204242781U - Insulating angle rings for transformer windings - Google Patents

Abstract

The utility model discloses an insulating angle ring for transformer windings, which is characterized in that it comprises transformer winding turns and a plurality of insulating angle rings, the insulating angle rings are a U-shaped structure, and the transformer winding turns or It is a turn of a wire bent multiple times to form a "bow" structure. The insulating angle ring is buckled on the turn of the transformer winding or multiple bending parts of the turn, and the wire joint extends out of the turn of the transformer winding. The bend on one side. Through the above method, the utility model can greatly increase the creepage distance on both sides of the coil through the improvement of the small angle ring of the winding coil, and also improve the working efficiency.

Description

Insulating angle rings for transformer windings

technical field

The utility model relates to the field of power transformer manufacturing, in particular to an insulating angle ring used for transformer windings and a manufacturing method thereof.

Background technique

In the prior art, the transformer winding is the "heart" part of the transformer, which not only needs to meet the requirements of mechanical strength, but also requires sufficient electrical strength. Especially for high-voltage products, the distribution of the electric field at the end of the winding is complex, and the maximum field strength of the end outlet is in the oil gap inside the end of the high-voltage coil, which is prone to partial discharge and cause surface discharge. If the end wire has a large arc or additional insulation, the maximum field strength can be weakened, and if an angle ring is added, the creepage distance can be increased. For high-voltage transformers, this method is used to improve the terminal electric field. Angle rings can extend the creepage path of high voltage and low voltage windings, prevent creepage between windings or between line segments, and improve winding ends and electric field distribution. In order to increase the creepage distance in the compact structure, the small angle rings on the end turns are more and more widely used. Since the existing small angle rings are all L-shaped, if both sides of the turns are wrapped, two The L-shaped corner rings are bound together, and the upper end and the end of the high-voltage winding each have 8 to 10 segments, which brings great inconvenience to production.

Utility model content

The technical problem mainly solved by the utility model is to provide an insulating angle ring for transformer windings, which can greatly improve the electric field at the end.

In order to solve the above technical problems, a technical solution adopted by the utility model is: an insulating angle ring for transformer windings, including transformer winding turns and a plurality of insulating angle rings, the insulating angle ring is a U-shaped structure, The transformer winding turn is a turn that is bent multiple times to form a "bow" structure, and the insulating angle ring is buckled on the transformer winding turn or multiple bending parts of the turn. The splice extends out of the bend on one side of the transformer winding turns.

The utility model also provides an insulating corner ring for transformer windings and its manufacturing method. According to the height and width of the winding turns, one side of the 0.5mm small corrugated cardboard is folded to the height of the winding turns minus 1-1.5mm. Then fold the size of the same width as the winding turns, and finally fold the same size as the height of the winding turns to make a U-shaped insulating angle ring; wrap U at the end and end turns of the high-voltage winding at the same time U-shaped insulating angle ring, buckle the U-shaped insulating angle ring directly on the inner or outer side of the winding turns and then wrap it thinly.

The beneficial effects of the utility model are: improving the electric field at the end of the high-voltage product, increasing the creepage distance between the wire segments, greatly improving the creepage distance on both sides of the wire turns through the improvement of the small angle ring of the winding wire turns, and improving the working efficiency .

Description of drawings

Figure 1 is a schematic diagram of the installation of the U-shaped insulating angle ring used in the transformer winding of the utility model.

The marks of each component in the accompanying drawings are as follows: 1, winding turns; 2, U-shaped insulating angle ring.

Detailed ways

The preferred embodiments of the utility model will be described in detail below in conjunction with the accompanying drawings, so that the advantages and characteristics of the utility model can be more easily understood by those skilled in the art, so that the protection scope of the utility model can be defined more clearly .

Please refer to Fig. 1, the utility model embodiment comprises: a kind of insulating corner ring for transformer winding, comprises transformer winding coil 1 and a plurality of insulating corner rings 2, and described insulating corner ring 2 is a U-shaped structure, so The transformer winding turn 1 is a turn that is bent multiple times to form a "bow" structure, and the insulating angle ring 2 is buckled on the transformer winding turn 1 or a plurality of bending parts of the turn. The wire joint extends out of the bending part on one side of the transformer winding turn.

An insulating angle ring for transformer windings and a manufacturing method thereof, according to the height and width of the winding turns 1, one side of a 0.5mm small corrugated cardboard is folded to a size equal to the height of the winding turns minus 1 to 1.5mm, and then Then fold the size of the same width as the winding turn 1, and finally fold the same size as the height of the winding turn 1 to make a U-shaped insulating angle ring 2; the end of the high-voltage winding and the end of the turn are wrapped in a U shape at the same time As for the insulating angle ring 2, the U-shaped insulating angle ring 2 is directly buckled on the inside or outside of the winding turn 1 and then thinned.

The utility model is different from the prior art in that the U-shaped insulating angle ring can increase the creepage distance on both sides of the winding turns at the same time, as long as the U-shaped insulating angle ring is directly buckled on the inner or outer side of the winding turns and then thinned, The expected effect can be fully achieved, and the work efficiency can be greatly improved. However, the existing L-shaped small angle ring can only meet the creepage of one side of the coil.

The above is only an embodiment of the utility model, and does not limit the patent scope of the utility model. Any equivalent structure or equivalent process conversion made by using the utility model specification and accompanying drawings, or directly or indirectly used in other Related technical fields are all included in the patent protection scope of the present utility model in the same way.

Claims (1)

1. An insulating angle ring for transformer windings, characterized in that: it includes transformer winding turns and a plurality of insulating angle rings, the insulating angle rings are a U-shaped structure, and the transformer winding turns are either a The wire is bent multiple times to form a "bow"-shaped turn, the insulating angle ring is buckled on the transformer winding turn or multiple bending parts of the turn, and the wire joint extends out of the side of the transformer winding turn bending part.