JPS61150308A - Winding of electric equipment - Google Patents

Abstract

PURPOSE:To improve the reduction effect of temperature rise and the cooling effect, by forming the cooling passage in the radial direction between the disk windings and setting up the blocking plate which does not block more than 1/2 of the cooling passage in a cross section. CONSTITUTION:The disk winding 3 is formed by winding a single wire between the inner insulating pipe 1 and the outer insulating pipe 2, which is stacked up several steps with the specified spacing in the axial direction and is divided into two parts in the radial direction. The cooling passages 4-7 are formed between the layers of winding, inside, outside, and along the inside axis of winding. The blocking plates 10-12 are installed periodically as they do not block more than 1/2 of the same cross section of the cooling passages 5-7 in the axial direction. Composed with the case where the insulating fluid flows zigzag in each cooling section, the higher cooling effect is obtained.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a disk winding that cools the winding of electrical equipment such as a transformer or an axle winding by naturally circulating an insulating fluid such as an insulating oil. Regarding lines.

[Technical background of the invention and its problems]

The cooling path structure of conventional electrical equipment windings, such as large transformer windings and large reactor windings, in which insulating fluid such as insulating oil is cooled by natural circulation in a cooling path formed around the windings, is the fourth type.
It is configured as shown in the figure. That is, a disk winding 3 is formed by winding a wire conductor between an inner insulating cylinder 1 and an outer insulating cylinder 2.
are stacked in multiple stages at predetermined intervals in the axial direction of the winding, and the disk winding 3 is divided into a plurality of pieces in the radial direction in order to improve the cooling effect of the winding. In order to circulate insulating oil around the disc windings wound in this manner and cool them, radial cooling passages 4 are provided between the laminated layers of each disc winding 3.
and communicates with this radial direction cooling path 4 to connect the inner circumferential side of the disk winding 3 to the inner insulating tube 1, the outer circumferential side of the disk winding 3 to the outer insulating tube 2, and the disk winding 3t- An inner axial cooling path 5, an outer axial cooling path 6, and an inner winding axial cooling path 7 are formed at the divided locations, respectively.

In the cooling path structure configured in this way, the disk winding 3 is arranged so that one cooling area is formed by several stages of the disk winding 3.
Inner closing plates 8 and outer closing plates 9 are periodically attached to the inner and outer insulating tubes 1.degree.2, respectively, so as to alternately close the inner and outer axial cooling passages 5, 6 during this period.

Therefore, the insulating fluid that naturally circulates within the windings has an inlet and an outlet that are reversed in each cooling area partitioned by the inner and outer blocking plates 8 and 9, forming a nog deg shape between each disc winding 3. The disk winding 3 is cooled by flowing through the formed radial cooling path 4 from below to above.

However, in the cooling path structure described above, the inside and outside of the floor are blocked J! i: An axial cooler inside the treadle winding, which is divided into discs for the purpose of achieving a low winding heat flow density and an increase in the natural circulation flow rate in the cooling zone formed by 8 and 9. The action of 7 is that no matter where the inner and outer blocking plugs 7.8 Since the directional cooling passages are blocked at the same time, the fluid resistance within the cooling area is increased and the natural circulation flow rate cannot be increased, making it impossible to fully perform its original role.

For this reason, the cooling of the winding provided with the axial cooling path 7 within the winding does not produce the expected effect, and the low-range effect of increasing the winding temperature becomes insufficient.

[Purpose of the invention]

The objective is to obtain an electrical equipment winding with a high in-winding axial cooling path.

[Summary of the invention]

In order to achieve the above object, the present invention forms a radial cooling path between the disc windings, and provides inner and outer cooling between the inner and outer insulating cylinders arranged on the inner and outer sides of the disc winding. At the same time as forming a shadow, the disk winding is divided in the radial direction to form an axial cooling path within the winding, each of these cooling paths is communicated, and the axial cooling path is periodically blocked by a blocking plate. This is characterized in that the closing plate is attached so as not to block more than 1/2 of the axial cooling path in the same cross section.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIG. A plurality of disc windings 3 made by winding a wire conductor between an inner insulating cylinder 1 and an outer insulating cylinder 2 are stacked in multiple stages at a predetermined interval in the axial direction, and the disc windings 3 are radially 2
To divide.

A radial cooler 4 is formed between the laminated layers of each disc winding 3 in order to cool the disc winding 3 by circulating an insulating fluid around the disc winding 3. In addition, in communication with this radial direction cooling path 4, the inner peripheral side of the disc member m3 and the inner insulating cylinder 1, the outer peripheral side of the disc member +iI3 and the outer insulating cylinder 2, and the parts where the disc winding 3 are divided, respectively. An inner axial cooling passage 5, an outer axial cooling passage 6, and a winding inner axial cooling passage 7 are formed.

In the cooling path structure formed in this way, the first closing plate 1 is arranged so that one cooling area is formed by several stages of disk windings 3.
0 is installed separately at the position of the winding inner axial cooling passage 7 so as to close only the inner axial cooling passage 5 and not to block the winding inner axial cooling passage 7, and the second closing plate 11 is attached to the winding inner axial cooling passage 7. It is installed so as to close only the inner axial direction cooling path 7, and the third
The closing plate 12 closes only the outer axial cooling passage 6, and is attached separately at the position of the inner winding axial cooling passage 7 so as not to block the inner winding axial cooling passage 7. Furthermore, first, second and third closing plates 10, 11, 12 are mounted periodically throughout the winding. That is, each closing plate is mounted so as not to block more than 1/2 of the axial cooling path in the same cross section.

When the insulating fluid naturally circulates in the cooling path structure constructed as described above, the first
, the flow of insulating fluid in the radial cooling path 4 is actively induced by the closing plate of the second WJ 3, and a total of three inner and outer axial cooling paths 5°6 and the inner winding axial cooling path 70 are formed. Two of the axial cooling passages are never blocked at the same time. For this reason, compared to the conventional case where the insulating fluid flows in a zigzag pattern in each cooling zone of the winding, the heat transfer coefficient does not decrease, and the fluid resistance of one cooling zone can be reduced, increasing the natural circulation flow rate. The temperature of the insulating fluid within the wire can be lowered, and the rise in winding temperature can be reduced. As a result, the effect of reducing winding temperature rise can be obtained as expected for the first time.

Next, another embodiment according to the present invention will be described based on FIG. 2. This embodiment is applied when the winding becomes larger due to the increase in the capacity of the winding, and is a disk winding 3t formed by winding a wire conductor between an inner insulating tube 1 and an outer insulating tube 2. - The windings are stacked in multiple stages at predetermined intervals in the axial direction, and the disc winding 3t is divided into three in the radial direction. The disk winding 3 wound in this way has a radial cooling path 4 formed between the laminated layers of each disk winding a3 for cooling by circulating an insulating fluid; An inner axial cooling path 5 is connected to the directional cooling path 4 between the inner circumferential side of the disc winding 1a3 and the inner insulation B1, and an outer axis is connected between the outer circumferential side of the disc winding 3 and the outer insulating tube 2. Directional cooling passages 6 and axial cooling passages 7g and 7b within the windings are formed at locations where the disc winding 3 is divided, respectively.

In the cooling path structure configured in this manner, the first closing plate 13 is provided only with the inner axial cooling path 5 and the winding inner axial cooling path 7a so that one cooling area is formed by several stages of the disc MA3. At the same time, the winding inner axial cooling passage 7b is installed separately at the position of the winding axial cooling passage 7b so as not to be blocked. Only the cooling path 7b is closed, and the winding axial cooler 2m is divided and installed at the position of the winding axial cooling path 7a so as not to be blocked.

Furthermore, the first and W, second closure plates 13,14 are mounted alternately throughout the winding.

When the eight-edge fluid naturally circulates in the cooling passage structure configured in this way, the flow of the insulating fluid in the radial cooling passage 4 is actively caused by the first and second blocking plates 13, 14 installed alternately throughout the winding. At the same time, only two of the four axial cooling passages, the inner and outer axial cooling passages 5.6 and the winding inner axial cooling passages 7a and 7b, are blocked at the same time.
With only a book, the same effects as in the embodiment shown in FIG. 1 can be obtained.

Furthermore, another embodiment of the present invention is shown in FIG.

This embodiment is a modification of the embodiment shown in FIG. 16 is attached so as to close only the inner winding axial cooling passages 7m and 7b.

Even if the wadding cooling area is constructed over the entire winding in this way, the same effects as in the embodiment shown in FIG. 2 can be expected.

〔Effect of the invention〕

As explained above, according to the present invention, in addition to the inner and outer axial cooling passages, the disk @ wire is divided in the radial direction to form the inner winding axial cooling passage. Since 9 blocking plates are installed to prevent more than 1/2 of the cooling path from being blocked, the cooling effect of the windings is good and the cooling effect is high.As a result, the applicable capacity of natural cooling type electrical equipment can be expanded. It is possible to provide winding wires for electrical equipment that are easy to measure and are inexpensive.

[Brief explanation of the drawing]

FIG. 1 is a partial axial cross-sectional view of a transformer winding showing one embodiment of the present invention, and FIGS. 2 and 3 are partial axial cross-sectional views of a transformer winding showing other embodiments of the present invention. , FIG. 4 is a partial cross-sectional view in the axial direction of the winding, showing the cooling path structure of a conventional transformer winding. DESCRIPTION OF SYMBOLS 1... Inner insulating tube, 2... Outer insulating tube, 3... Disc winding, 4... Radial cooling path, 5... Inner axial cooling path, 6... Outer shaft Directional cooling path, 7+7a, 7b・
...Inner winding axial cooling path, 10, 13.15...1st
Closure plate, 11.14.16...Second closure plate, 12...
-Third occlusion plate. Applicant's Representative Patent Attorney Takehiko Suzue Figure 1 Figure 20 Figure 4 Figure 3

Claims (1)

[Claims] A plurality of stages of disc windings are arranged between the inner and outer insulating cylinders, a radial cooling path is formed between the laminated layers of the disc windings, and a cooling path is formed between the inner and outer insulating cylinders and the disc windings. Inner and outer axial cooling passages are formed respectively, and the disc winding is divided in the radial direction to form an inner winding axial cooling passage, and these cooling passages are communicated with each other, and the axial cooling passage is closed by a closing plate. 1. An electrical equipment winding, characterized in that the electrical equipment winding is periodically closed by a closing plate so as not to block more than 1/2 of the axial cooling path in the same cross section.