Novel U-shaped double-layer spiral winding structure
A technology of spiral winding and winding structure, applied in the field of transformers, can solve the problems of increasing the number of insulating parts, manufacturing difficulty and workload, increasing the cost of transformers, and large insulating distance, and achieves good tightness, reduced insulating distance, and the number of insulating parts. reduced effect
Pending Publication Date: 2021-10-19
CHENGDU SHUANGXING TRANSFORMER
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Problems solved by technology
Because the helix angles of the inner and outer spiral windings are opposite, two stays and a layer of cardboard are generally added between the inner and outer spiral windings, so that the insulation distance between the inner and outer windings is large, which increases the cost of the transformer.
In addition, the inner and outer spiral windings need their own inner paper tubes, stays and oil passage pads, which increases the number of insulating parts, manufacturing difficulty and workload
Method used
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[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0025] The present invention provides such figure 1 , figure 2 , image 3 , Figure 4 and Figure 5 A new U-shaped double-layer spiral winding structure is shown, including an inner paper tube 1, a stay 2, an inner spiral winding 3 and an outer spiral winding 4, the stay 2 is set around the inner paper tube 1, and the inner spiral The winding 3 and the outer spiral winding 4 are set around the inner paper tube 1 in turn, and an axial oil passage 5 is arra...
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A novel U-shaped double-layer spiral winding structure disclosed by the invention comprises an inner paper tube, a supporting strip, an inner-layer spiral winding and an outer-layer spiral winding, wherein the supporting strip is arranged around the inner paper tube, the inner-layer spiral winding and the outer-layer spiral winding are sequentially arranged around the inner paper tube, an axial oil duct is arranged between the inner-layer spiral winding and the outer-layer spiral winding, and end rings are respectively arranged at the same ends of the inner-layer spiral winding and the outer-layer spiral winding. According to the novel U-shaped double-layer spiral winding structure, the number of insulating parts is reduced, machining is simple, the insulating distance is shortened, and cost is reduced.
Description
technical field [0001] The invention belongs to the technical field of transformers, and in particular relates to a new U-shaped double-layer spiral winding structure. Background technique [0002] U-shaped double-layer spiral windings are used for low-voltage windings of axially split transformers and super-large-capacity power transformers. The difference from ordinary spiral windings is that the outgoing wires at the beginning and end are all drawn out on the same side of the winding. This can reduce the lead wire length, and the three-phase resistance unbalance rate is easy to realize. Because the helix angles of the inner and outer spiral windings are opposite, two stays and a layer of cardboard are generally added between the inner and outer spiral windings, so that the insulation distance between the inner and outer windings is large, which increases the cost of the transformer. In addition, the inner and outer spiral windings need their own inner paper tubes, stays...
Claims
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Patent Timeline
Login to View More IPC IPC(8): H01F27/30H01F27/32H01F27/28
CPCH01F27/306H01F27/303H01F27/321H01F27/324H01F27/28
Inventor 刘广西孙日明王艳萍杨剑
Owner CHENGDU SHUANGXING TRANSFORMER