Integral casting method of epoxy resin insulated transformer coil
A technology for insulating transformers and transformer coils, which is applied in coil manufacturing and other directions, and can solve problems such as no one manufacturing
Active Publication Date: 2016-03-16
FOSHAN EAGLERISE POWER SCI & TECH SHUNDE CO LTD +3
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Problems solved by technology
For this reason, how to form a lotus-shaped epoxy resin integral insulating layer in large-scale dry-type transformer products, no one has made it so far, at least it has not been found in large-scale dry-type transformers so far. type transformer products
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[0019] The overall casting process of the epoxy resin insulated transformer coil of the present invention will be further described below in conjunction with the accompanying drawings.
[0020] Such as figure 1 As shown, the transformer coil includes an inner group of coils 13 and an outer group of coils 14 arranged concentrically. The inner group of coils 13 itself has airway holes. The coils may also be two sets of coils of the same voltage level. The central position of the inner group of coils 13 is the central hole 10 .
[0021] There is a connected epoxy insulating layer 16 between at least the two groups of coils (13, 14). Seen from the cross section, the epoxy insulating layer 16 has a plurality of discontinuous central holes (11, 12) , these central holes (11, 12) can not only dissipate heat but also save resin material, and make the resin insulation layer easy to process during casting. The spaced connecting ribs 15 between these central holes (11, 12) not only fo...
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An integral casting method for epoxy resin insulated transformer coils. The transformer coils include two sets of inner and outer coils arranged concentrically. At least the two sets of coils are provided with a connected epoxy insulating layer, and the epoxy insulating layer is in the shape of a lotus root. ; It is characterized in that the step of forming the lotus-shaped epoxy insulating layer is: arranging several polytetrafluoroethylene strips at intervals on the outside of the inner coil that has been wound, and then winding the polytetrafluoroethylene strips on the outside Manufacture and reshape the outer group of coils to obtain a formed bare coil group; then pour epoxy into the bare coil group embedded with polytetrafluoroethylene strips as a whole, and extract the polytetrafluoroethylene strip after the epoxy is solidified. Vinyl strips, obtained qualitatively monolithic the transformer coils. Because the present invention has the above features and advantages, it can be applied to the integral casting process of epoxy resin insulated transformer coils to obtain the product with lotus structure.
Description
technical field [0001] The invention relates to an integral casting method for epoxy resin insulated transformer coils. The transformer coils include two sets of inner and outer coils arranged concentrically. At least the two sets of coils are provided with a connected epoxy insulating layer. It is lotus root shape. Background technique [0002] At present, all the coils of epoxy resin insulated dry-type transformers (hereinafter referred to as "epoxy dry transformers") are manufactured separately from "high-voltage coils", "low-voltage coils", "insulation cylinders" (optional), etc., several parts Concentric sets on iron core columns, this traditional method has been used for decades, both at home and abroad, forming an "eternal" structural model, with almost no breakthroughs. [0003] In patent documents related to epoxy resin insulated dry-type transformers, an integral epoxy transformer with a lotus-shaped epoxy insulating layer is disclosed, but these documents do not ...
Claims
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IPC IPC(8): H01F41/04B29C39/06
Inventor 肖俊承黄荣星李敬民张今朝
Owner FOSHAN EAGLERISE POWER SCI & TECH SHUNDE CO LTD