A reactor core and its preparation process

Abstract

The invention relates to the technical field of reactor production, and more particularly relates to a novel reactor core and a preparation process thereof. The novel reactor core comprises a plurality of silicon steel sheets, support frames and a non-weft belt, wherein each support frame comprises a vertical frame surface, frame legs perpendicular to the frame surface, and a platform parallel to the frame legs; and silicon steel sheets are arranged in parallel on two support frames arranged symmetrically, are clamped by the two support frames and are tightly connected integrally through the non-weft belt. Compared with the prior art, the method of tightening the core has the advantages that the silicon steel sheets are clamped in the support frames and then wound by the non-weft belt, so that the possibility of core scattering is eliminated from the source, the loose phenomenon between the silicon steel sheets is avoided, the influence caused by the aging effect is avoided, and the noise source is eliminated, thus solving the technical problem that the core reactor has large noise for a long time.

Description

technical field [0001] The invention relates to the technical field of reactor production, in particular to a reactor iron core and a preparation process thereof. Background technique [0002] As an important reactive power compensation equipment, reactors are widely used in power systems. Among them, iron core reactors have obvious advantages over similar products such as air core reactors and oil-immersed reactors, such as less magnetic flux leakage, low loss, and occupation. Small space, low noise, moisture-proof, flame-retardant, easy maintenance, etc. However, iron-core reactors, like other power equipment, have problems such as noise and temperature rise. The noise of the reactor is an important index to judge the structural performance of the reactor. It reflects the production and assembly quality of the reactor and affects the service life of the reactor. The noise of the reactor mainly comes from the mechanical vibration of the iron core and the electromagnetic n...

AI Technical Summary

Problems solved by technology

The defects of this production process are: after the silicon steel sheet is punched, the hole area occupies the effective magnetic cross section of the silicon steel sheet, which not only reduces the magnetic cross section of the iron core cake, increases the machining loss, but also has excessive insulation of the iron core. point grounding hazard

In particular, the clamping screw is located in the middle of the core cake, causing the two sides of the silicon steel sheet to become a spread shape under the action of the clamping force in the middle, causing the gap between the sheets around the core cake to increase, resulting in magnetic vibration noise. The expansion of the source increases the electromagnetic noise of the product, resulting in poor manufacturability and low reliability

[0004] In order to solve the problems of insufficient fastening force between steel sheets, looseness between sheets, noise, and affecting product life and safe operation, the Chinese invention patent application publication number CN101707136A provides a method for manufacturing reactor core cakes. The non-weft tape is bound around the periphery of the plates after fat impregnating to combine the plates together. However, this manufacturing method has the disadvantages of cumbersome process, low production efficiency and high cost, and the non-weft tape bound on the iron core can only act To prevent the core cake from loosening, the product is difficult to resist the loosening caused by the repulsive force generated between the steel sheets due to the surge during use

In addition, the Chinese Invention Patent Application Publication No. CN105161260A also provides a reactor iron core and its preparation method, using locking plates and gaskets instead of weft-free belts to fasten steel sheets in the traditional method of manufacturing reactor iron cores However, this method still does not overcome the punching of the silicon steel sheet, the hole area occupies the effective magnetic cross section of the silicon steel sheet, which not only reduces the magnetic cross section of the iron core cake, increases the machining loss, but also has multiple insulation points of the iron core. The problem of grounding hazards

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