JPH0682580B2 - Stationary induction equipment - Google Patents

Description

Description: TECHNICAL FIELD OF THE INVENTION The present invention relates to a stationary induction device, and more particularly to improvement of cooling efficiency of a coil thereof.

[Prior art]

FIG. 1 is a partial cross-sectional view showing the structure of, for example, a transformer as a conventional static induction device, in which a closed circuit iron core 1 is provided with an insulating cylinder 2, an inner insulating cylinder 3 and an outer insulating cylinder 4. An inner coil block 5 is provided between the insulating cylinder 2 and the inner insulating cylinder 3. Inner insulation cylinder 3 and outer insulation cylinder 4
An outer coil block 6 is provided between and. As shown in FIG. 2, vertical spacers 7 and 8 are provided on the inner and outer sides of the inner coil block 5 at equal intervals around the circumference of the inner coil block 5 to form vertical space portions 9 and 10. ing. Similar to the inner coil block 5, vertical spacers 11 and 12 are provided on the inner side and outer side of the outer coil block 6, respectively, and vertical space portions 13 and 14 are formed.

The inner and outer coil blocks 5 and 6 are formed by stacking a plurality of disc coil units 15 and 16 in the axial direction.
Horizontal spacers 17 and 18 are provided between the disk coil units 15 and 16 to form horizontal space portions 19 and 20, respectively. Both ends of the horizontal spacer 17 are attached to the vertical spacers 7 and 8, and both ends of the horizontal spacer 18 are attached to the vertical spacers 11 and 12, respectively.

A refrigerant reservoir 22 for accommodating a condensable refrigerant 21 is provided above the inner and outer coil blocks 5 and 6. Downflow holes 23 are formed in the bottom surface of the coolant reservoir 22.

Next, the operation of the transformer configured as described above will be described. Now, when the transformer is operated, the disk coil unit
An electric current flows through 15,16, and the disk coil units 15,16 generate heat due to the juule heat. This heat generating disk coil unit 15,16
In order to cool the air, the refrigerant 21 is sprayed on the upper surfaces of the inner and outer coil blocks 5 and 6 through the downflow holes 23. This refrigerant 21 is mainly used for the inner and outer coil blocks 5, 6 as shown by the arrow A.
It flows along the inner and outer circumferences of. At this time, each disk coil unit 15, 16 is cooled by the latent heat of vaporization when the refrigerant 21 evaporates.

The conventional transformer is configured as described above, and the refrigerant 21
Flows along the inner and outer circumferential surfaces of the inner and outer coil blocks 5 and 6 and hardly flows into the lateral space portions 19 and 20, so the cooling of the disk coil units 15 and 16 is performed on both the inner and outer circumferential surfaces thereof. However, the contact area between the refrigerant 21 and the disk coil units 15 and 16 is inevitably small, and the cooling efficiency of the disk coil units 15 and 16 is poor.

[Outline of Invention]

The present invention has a simple configuration in which a guide spacer is provided whose end portion is obliquely upwardly projected from the peripheral wall of the coil block and guides the refrigerant between the layers of the coil units on the lower surface of the horizontal spacer having a smaller width dimension than the guide spacer. The contact area between the refrigerant and the coil unit is increased to provide a stationary induction device with high cooling efficiency.

Example of Invention

An embodiment of the static induction device of the present invention will be described below with reference to the drawings. FIG. 3 is a partial sectional view of a transformer showing an embodiment of the present invention, and FIG. 4 is a perspective view of an essential part of FIG.
The same or corresponding parts as those in FIGS. 1 and 2 are designated by the same reference numerals, and the description thereof will be omitted. Spacers 27 having a width smaller than that of the guide spacers 24 are laminated on the guide spacers 24 at regular intervals in the circumferential direction in the lateral spaces 19, 20. The guide spacer 24 has a shape in which an end portion 29 is bent obliquely upward, and is projected from the peripheral surfaces of both the inner and outer coil blocks 5 and 6. Its end 2
A notch 25 is formed in the central portion of 9. Notches 28 and 30 are formed at both ends of the spacer 27. Then, as shown in FIG. 4, when the guide spacer 24 and the spacer 27 are arranged in the lateral space portion 19 so that the end portion 29 projects outside the inner coil block 5, the guide spacer 24 and the spacer 27 are formed in the cutout portions 25 and 28. The vertical spacer 8 and the vertical spacer 7 penetrate the notch 30. Further, guide spacers 24 and spacers 27 are also interposed in the lateral space portion 20 in the same manner as described above.

The guide spacers 24 and the spacers 27 thus configured are arranged at equal intervals in the axial direction between the disk coil units 15 and 16 and in the circumferential direction between the disk coil units 15 and 16. In addition, the end portion 29 has the refrigerant 21 in the disk coil unit as much as possible.
Both inner and outer coil blocks so as to spread between 15 and 16
The inner and outer circumferences of 5, 6 are alternately projected. In addition, in the place where the guide spacer 24 is not provided, the gap between the disk coils 15 and 16 is maintained by stacking two spacers 27.

Next, the operation of the transformer having the above configuration will be described. The refrigerant 21 flowing down from the downflow hole 23 is cooled by the inner and outer coil blocks.
It is sprayed on the upper surface of 5,6. This refrigerant 21 is indicated by arrow B in FIG.
As shown in Fig. 5, the inner and outer coil blocks 5 and 6 flow down along the inner and outer circumferential surfaces. Then, when the refrigerant 21 flows down to the end portion 29 of the guide spacer 24 while flowing down, the refrigerant 21
As shown by the arrow C in FIG. 4, it flows so as to slide down on the upper surface of the end portion 29, then passes through the upper surface of the step portion 31 formed by the guide spacer 24 and the spacer 27, and the disc coil unit
It is guided between 15 and flows down to the upper surface of the disk coil unit 15.
Further, the refrigerant 21 is also flowed down on the upper surface of the disk coil unit 16 in the same manner as above.

In this way, since the refrigerant 21 is evenly guided between the disk coil units 15 and 16, the contact area between the refrigerant 21 and the disk coil units 15 and 16 is significantly increased compared to the conventional one described above. Then
The disk coil units 15 and 16 are cooled efficiently. Further, the spacer 27 that forms the flow-down passage of the refrigerant 21 together with the guide spacer 24 also serves as the spacer that forms the lateral space portions 19 and 20 of the disk coil units 15 and 16, and the shape of this spacer 27 and Together with the guide spacer 24, which is simple and easy to manufacture, the transformer construction period can be shortened and the cost can be reduced.

Although the guide spacer 24 has the notch 25 in the above embodiment, it may have no notch 25 as shown in FIG. Alternatively, both ends 29 of the guide spacer 24 may be bent, as shown in FIG. 6, and notches 25 may be formed at both ends 29, respectively, as shown in FIG. Furthermore, although a transformer has been described as the stationary induction device in the above embodiment, the present invention is not limited to this and may be a reactor or the like. Further, in the above embodiment, the guide spacer 24 having a width wider than the spacer 27 is provided on the lower surface of the spacer 27, and the step portion 31 for guiding the refrigerant 21 is formed.However, the guide spacer having a width smaller than the spacer is provided on the upper surface of the spacer, A step may be formed.

〔The invention's effect〕

As described above, according to the stationary induction device of the present invention,
The refrigerant is guided by a simple structure in which a guide spacer whose end portion is obliquely upwardly projected from the peripheral wall of the coil block and which guides the refrigerant between the layers of the coil units is provided on the lower surface of the horizontal spacer having a smaller width than the guide spacer. There is an effect that the refrigerant is smoothly guided from the end portion to the interlayer of the coil unit, the contact area between the refrigerant and the coil unit is significantly increased, and the cooling efficiency is improved. Further, since the stepped portion formed by the horizontal spacer and the guide spacer serves as a coolant flow-down passage and divides the coolant in the circumferential direction of the coil unit, there is an effect that the entire coil block is cooled. In addition, the horizontal spacer also serves as a spacer that forms the horizontal space between the coil units, and this spacer and the guide spacer, which has a simple shape and is easy to manufacture, shortens the construction period of the static induction device and reduces the cost. There is also an effect that it can be down.

[Brief description of drawings]

FIG. 1 is a partial sectional view of a conventional transformer, FIG. 2 is a partial plan view of FIG. 1, FIG. 3 is a partial sectional view showing an embodiment of the present invention, and FIG. 5 to 7 are perspective views of essential parts of FIG.
The drawings are perspective views of respective guide spacers showing another embodiment of the present invention. 15,16 …… Disc coil unit, 17,18 …… Horizontal spacer, 21…
… Refrigerant, 24 …… Guide spacer, 27 …… Spacer, 29 ……
edge. In each figure, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] 1. A stationary induction device in which a coil block formed by stacking coil units in an axial direction with a horizontal spacer interposed therebetween is cooled by a condensable refrigerant flowing down from above the coil block, and a peripheral wall of the coil block. A stationary guide having an end projecting obliquely upward from the guide spacer for guiding the refrigerant between the layers of the coil unit is provided on the lower surface of the lateral spacer having a smaller width dimension than the guide spacer. machine.