Combined type iron core structure of dry-type transformer

Abstract

The invention discloses a combined type iron core structure of a dry-type transformer. The combined type iron core structure comprises an upper press part and a lower press part, wherein press plates arranged between the upper press part and the lower press part and include a first press plate and a second press plate, a transformer frame is arranged at the lower portion of a supporting rod, uniform insulating protrusion portions are arranged on the outer side of a high-voltage iron core, an insulating cushion block in contact with a sound-insulation protrusion portion is arranged at one end of a support, and the support comprises a wire winding support and a connector support. The insulation and voltage resistance capability of the iron core is improved by a buffer insulation layer between iron cores, the cooling requirement of the iron core itself is met by adopting multiple gas circulating flow, meanwhile the filling rate of a coil is also improved, the high-voltage iron core and a low-voltage iron core are combined, dismounting and mounting are convenient, the practicability is strong, the manufacturing cost is low, and popularization is promoted.

Description

technical field [0001] The invention relates to an iron core structure, in particular to a combined iron core structure of a dry-type transformer. Background technique [0002] The iron core is the main magnetic circuit part of the transformer. It is usually made of stacked hot-rolled or cold-rolled silicon steel sheets with high silicon content and coated with insulating paint. The iron core and the coil wound on it form a complete electromagnetic induction system. The transmission power of the power transformer depends on the material and cross-sectional area of ​​the iron core. [0003] The Chinese patent application number 201320203379.7 discloses a three-phase three-column amorphous alloy dry-type transformer and its iron core, which includes an outer frame iron core and two inner frame iron cores, and the two inner frame iron cores are arranged side by side on the Inside the outer frame iron core, the overlapping parts of the outer frame iron core and the two inner ...

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Problems solved by technology

[0004] The disadvantage of this patent is: the iron core inner frame iron core and the outer frame iron core of the iron core of the three-phase three-column amorphous alloy dry-type transformer, the inner surface of the inner frame iron core and the outer surface of the outer frame iron core are provided with With sound insulation felt, the noise generated by dry-type transformers is low-frequency noise. Although the sound insulation felt has the function of sound insulation, but for low-frequency noise, the sound insulation effect of the sound insulation felt is not great; the sound insulation felt has only a thin layer and has no elasticity. Structure, can not play the effect of shock absorption at the same time of sound insulation; amorphous alloy sheet is solidified by ultra-rapid cooling, when the alloy is solidified, it is too late to arrange and crystallize in an orderly manner, and the obtained solid alloy has a long-range disordered structure without crystals of crystalline alloys. There are grains and grain boundaries. Although this alloy has unique properties, at the same time, the hardness of the amorphous alloy sheet material is very high, it is difficult to cut with conventional tools, the thickness of the single sheet is extremely thin, and the surface of the material is not very flat. , the core filling factor is low, very sensitive to mechanical stress, tension and bending stress will affect the magnetic properties, the structure must be specially designed

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