JPS60173811A - Winding of electric apparatus - Google Patents

Abstract

PURPOSE:To contrive easy manufacture without increasing the dimensions of a winding and uniform and effective cooling by attaching the external circumferential surface of a circular plate winding closely to the inside of an internal or external insulation cylinder alternately and by providing a separating plate between the circular plate windings. CONSTITUTION:One step circular plate winding 3 is attached closely to the internal surface of an internal insulation cylinder 1 and the next step circular plate winding 13 is placed between upper and lower U-shape separating plates 14. The separating plate 14 is placed around the internal insulation cylinder 1 radially and in equal interval and a horizontal cooling route 5 is formed in the radial direction between the circular plate windings 3 and 13 and an internal vertical cooler 8 is formed between the internal insulation cylinder 1 and the circular plate winding 13. Outside of the circular plate windings placed in plural steps to the direction of axis, an external insulation cylinder 2 is provided closely adhering to the external circumferential surface of the circular plate winding 13 placed with the separating plate 14 and an external vertical cooling route 9 is formed between the circular plate winding 13 attached closely to the internal insulation cylinder 1.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to electrical equipment windings, and more particularly to electrical equipment windings having disk windings used in transformers, accelerators, and the like.

[Technical background of the invention and its problems] D3
In this case, the winding is shown in FIGS. 1 and 2. J: A multi-stage structure in which a wire conductor is wound between an inner insulating tube 1 and an outer insulating tube N2 spaced apart from the inner insulating tube 1. The disk winding 3 is stacked at intervals in the axial direction.

A plurality of horizontal spacing pieces 4 are arranged radially at equal intervals between each of the disc windings 3, and a radial horizontal cooling passage 5 is formed between each disc winding 3. Further, between the inner and outer insulating cylinders 1 and 2 and the disk winding 3, vertical spacing pieces 6 and 7 are arranged on the inner and outer periphery of the disk winding 3 corresponding to the horizontal spacing pieces 4. An inner vertical cooling passage 8 and an outer vertical cooling passage 9 are respectively formed. Furthermore, this winding has a second
As shown in the figure, donut-shaped closing plates 10J3 and 1 are arranged so that one cooling zone is formed by several stages of the disk windings 3.
1 completely contacts the outer periphery of the inner insulating cylinder 1 and the inner periphery of the closing plate 10 and the outer periphery of the closing plate 11 of the outer insulating cylinder 2 at every several stages of the disc winding 3, Each of the vertical cooling passages 8
and 9 alternating.

It is installed in such a way that it is occluded.

Therefore, the cooling fluid, for example insulating oil, flows between each disc winding 3 from bottom to top in a zigzag pattern, with the insulating oil inlet A and outlet B reversed for each cooling zone; The windings are cooled.

However, in the transformer winding having the above structure, the flow of the insulating oil branched into each horizontal cooling path 5 in a certain cooling area formed by the closing plates 10 and 11 is not uniform, and generally the insulating oil inlet A (=The oil flow velocity in the lower horizontal cooling passage 5 near J is very small compared to the oil flow velocity in the horizontal cooling passage 5 near insulating oil outlet B. In other words, in this cooling area The oil flow velocity distribution 12 in each horizontal cooling path 5 is as shown by the broken line arrow in FIG.

Therefore, compared to the disk winding 3 placed near the oil outlet B,
There is a problem in that the disk winding 3 disposed near the oil inlet A is not cooled sufficiently.

For this reason, even if the blocking plates 10 and 11 were installed and the insulating oil was passed through the windings in a zigzag pattern, the expected uniform cooling effect of each disk winding could not be obtained, and the windings in Volume I! A problem arises in that the temperature rise cannot be made uniform and that an excessive temperature rise occurs locally in each cold 2JI zone, deteriorating the winding insulation and shortening the life of the transformer.

As a countermeasure to this problem, a disk winding 3 is formed.
The current density is lowered by increasing the cross-sectional area of the element 11A conductor, and the winding cooling fill design is based on the minimum flow velocity of the insulating oil in the horizontal cooling path 5. This has the disadvantage of making the transformer larger.

Furthermore, in order to eliminate the above-mentioned drawbacks, the closing plates 10 and 11 may be attached alternately to each stage of the disc winding 3, but the axial dimension of the entire winding is reduced by the increase in the closing plates 10 and 11. becomes large. There is also a method of attaching spacer pieces directly to the inner and outer periphery of the disc winding 3 to block the vertical cooling passages 8 and 9 in order to prevent the axial usage from increasing.
It takes a considerable amount of time to manufacture and remove the spacer pieces, which may lead to an increase in the price of the transformer.

[Object of the Invention] The present invention eliminates the above-mentioned drawbacks and provides an electric decoction winding having a disk winding that is easy to manufacture and allows uniform and effective cooling without increasing the winding size. 1. Cover with the purpose of getting better.

[Summary of the Invention] In order to achieve the above objects, the present invention has the first stage of the disc winding having its inner circumferential surface closely attached directly to the inner insulating cylinder, and the subsequent stage having a spacer piece for forming an inner vertical cooling path. These two stages are stacked alternately in the axial direction, and the outer insulating cylinder is placed directly on the outside. This system is characterized in that the insulating fluid is made to flow in a zigzag pattern at each stage without using any blockage pieces to achieve a uniform oil flow velocity.

[Embodiment of the Invention] Hereinafter, an embodiment of the present invention will be described based on FIGS. 3, 4, and 5. In the figure, the same reference numerals as in FIGS. 1 and 2 indicate the same or corresponding parts.

In a transformer equipped with a disk winding, a one-stage disk winding 3 consisting of a wire conductor wound around the outside of an inner insulating tube 1 is installed in the inner insulating tube 1 without providing a vertical cooling path. It is attached with the inner circumferential surface in close contact.

The next stage of disc winding! ! 13 is disposed with a U-shaped spacer piece 14 sandwiching the upper and lower surfaces thereof. The spacing pieces 14 are arranged radially around the inner insulating cylinder 1 at equal intervals as shown in FIG. 4, and form a radial horizontal cooling path 5 between the disc windings 3 and 13. Inner insulation tube 1
An inner vertical cooling path 8 is formed between the inner vertical cooling passage 8 and the disk winding 13 . The disk Pj13 in the further succeeding stage is again the inner insulating cylinder 1.
Thereafter, the disk winding 3 closely attached to the inner insulating cylinder 1 and the disk winding 3 with the spacing piece 14 interposed therebetween are arranged in the same manner. The outer insulating tube 2 is disposed on the outside of the disk windings 3 and 13 stacked in multiple stages in the axial direction in this way, with the spacer piece 14 interposed therebetween.
11 and a disk winding 3 disposed in close contact with the inner insulating cylinder 1 to form an outer direct cooling path 9.

The transformer type winding having the horizontal cooling path 5, the inner vertical cooling path 8, and the outer vertical cooling path 9 configured in this way forms a zigzag-shaped cooling path with the winding itself, so there is no donut-shaped blockage. The insulating fluid can be flowed in a zigzag pattern from stage to stage without the need for plates, fabrication, or installation-intensive spacing pieces, allowing the flow of insulating fluid in a single cold N Considering the non-uniformity of oil flow, it is possible to perform cooling design based on a larger and more accurate oil flow speed, rather than cooling design based on the lowest oil flow speed, which further improves the cooling effect.

In addition, since the radial dimension of the winding is smaller by one vertical cooling path compared to the same winding, the outer diameter can be made smaller.

In the above embodiment, a U-shaped spacing piece was attached to the disc winding that was closely attached to the outer insulating cylinder, but conversely, a U-shaped spacer piece was attached to the disc winding that was closely attached to the inner insulating cylinder. A spacer piece may be attached, and its shape is not limited to the U-shape, but may be separated into upper and lower surfaces.

[Effects of the Invention] As described above, according to the present invention, in a structure in which a plurality of stages of disc windings are stacked between inner and outer insulating stations, the disc windings are alternately inserted into the inner and outer insulating cylinders, and the inner periphery of the disc windings is Take the surface and outer peripheral surface in close contact f=
The disc winding is easy to manufacture without increasing the winding dimensions, and cooling is performed uniformly and effectively, since a spacing piece is provided between each disc winding. It is possible to obtain electrical equipment windings with C.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of an electrical equipment winding equipped with a conventional disk winding, Fig. 2 is a cross-sectional view of Fig. 1 taken along the line ■-■ in the direction of the arrow, and Fig. 3 is a cross-sectional view of the present invention. FIG. 4 is a cross-sectional view of FIG. 3 taken along the line IV-IV in the direction of the arrow, and FIG. 5 is a cross-sectional view of FIG. 4 taken along the line v-v. FIG. 3 is a cross-sectional view taken along the arrow direction. DESCRIPTION OF SYMBOLS 1...Inner insulating tube, 2...Outer insulating tube, 3...Disc winding, 4...Horizontal spacing piece, 5...Horizontal cooling path, 6
, 7... Vertical spacing piece, 8... Inner vertical cooling path, 9...
・・Outer type direct cooling 11 passages, 10.11 ・・Closing plate, 12
...Oil flow speed valve (1i, 13...disc winding, 14...
...U-shaped bulkhead. Figure 1 l Figure 2 Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] In an electrical equipment winding comprising an inner insulating cylinder, an outer insulating cylinder provided at a distance on the outside of the inner insulating cylinder, and a disc winding stacked in multiple stages with intervals between the inner insulating cylinder and the outer insulating cylinder. , the disc windings are alternately attached to the inner insulating cylinder and the outer insulating cylinder with their inner peripheral surfaces and outer peripheral surfaces in close contact with each other, and a spacer piece is provided around the inner insulating cylinder to form a gap between each disc winding. An electrical equipment winding characterized by being provided at radial intervals.