JPH08288145A - Cooling structure for stationary induction apparatus - Google Patents

Abstract

PURPOSE: To allow a coolant to flow in the radial direction inside a disc winding without enlarging the disc winding. CONSTITUTION: In such a cooling structure that a coolant 2 is forcedly fed to a stationary induction apparatus consisting of disc windings and iron cores, a guide 22 is prepared to lead a coolant 2 to the inner diameter side of the winding 1, thereby allowing the coolant 2 to flow from the inner diameter side of the winding/thereof to the outer diameter side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling structure for a static induction electric device which is forcibly cooled by a cooling medium of insulating gas or insulating liquid.

[0002]

2. Description of the Related Art Static induction electric appliances having a winding and an iron core include a reactor that forms an inductance and a transformer that converts a voltage. FIG. 12 is a cross-sectional view showing the configuration in the case where the static induction electric device is a single-phase air-core reactor. Iron core 49 has upper and lower yokes 47, 48 and return legs 4 on both sides.
6 and 46 are formed in a frame shape. The disk winding 1 wound around the shaft 36 is arranged in the frame of the iron core 49. The disk winding 1 is air-core, and the magnetic flux generated from the disk winding 1 circulates via the return leg 46. FIG. 13 is a cross-sectional view showing the configuration in the case where the stationary induction electric device is a three-phase air-core reactor. The three-phase three-piece disk windings 1 are placed side by side, and the iron cores 44 are provided at both ends of the disk winding 1.
Is arranged. In the case of three phases, the return leg is unnecessary because the magnetic flux of the three phases becomes zero when combined. In the case of a transformer, in FIG. 12 and FIG. 13, each disk winding 1 is composed of a primary winding and a secondary winding, and a main leg is inserted in the winding.

FIG. 14 is a one-sided sectional view showing the cooling structure of a conventional static induction electric device. A disk winding 35 is arranged with a shaft 36 vertical, and an axial duct 32 is formed inside. Insulating cylinders 40 and 41 are arranged on the inner diameter side and the outer diameter side of the disc winding 35, respectively. The cooling medium 2 is poured from the lower part, flows in the disk winding 35 as shown by the arrow, and is discharged to the upper part.

In FIG. 14, cylinders 40 and 41 are guides 37 forcibly guiding the cooling medium 2 into the disk winding 35. The cooling medium 2 flows to the inner diameter side and the outer diameter side of the disc winding 35, and also flows into the axial duct 32 to cool the disc winding 35. However, the configuration of FIG. 14 has a drawback in that the cooling medium 2 is hard to flow in the radial duct 42 in the disk winding 35, and the cooling efficiency is very poor.
To that end, an axial duct 32 is provided and the cooling medium 2
The cooling efficiency has been increased by increasing the area of contact with the disk winding 35. The axial duct 32 is not necessarily one, but may be several. When the axial duct 32 is provided, the cooling efficiency is improved, but the outer diameter of the disk winding 35 is increased, and the entire static induction electric machine is enlarged.

FIG. 15 is a sectional view of one side of a main part showing a conventional cooling structure of a different static induction electric device. The disk winding 39 is arranged with the axis 36 vertical, and insulating cylinders 30 and 31 are arranged on the inner diameter side and the outer diameter side of the disk winding 39, respectively.
Insulating ring plates 33 and 34 are alternately interposed so as to partition the disk winding 39 in the axial direction. Cooling medium 2
Is poured from the lower part, flows in the disc winding 39 as shown by the arrow, and is drawn to the upper part.

In FIG. 15, cylinders 30 and 31 are guides 38 forcibly guiding the cooling medium 2 into the disk winding 39. Further, the cooling medium 2 is caused to flow in a zigzag manner by the ring plates 33 and 34 so that the cooling medium 2 flows in the disk winding 39 in the radial direction. By flowing the cooling medium 2 in the disk winding 39 in the radial direction, the disk winding 3 of the cooling medium 2
The area that touches 9 has increased, increasing its cooling efficiency.

Although FIGS. 14 and 15 are examples of air-core reactors, the cooling structure is the same even in the case of a transformer having an iron core and other windings arranged on the shaft 36.

[0008]

However, the conventional device as described above has a drawback that the disk winding becomes large. The configuration of FIG. 14 requires the axial cooling duct 32 as described above, so that the disk winding 35 becomes thick in the radial direction.

On the other hand, even with the configuration of FIG. 15, the ring plate 3
The radial ducts 42 are doubly required at the portions where the numbers 3 and 34 are interposed, and the disc winding 39 becomes long in the axial direction. In any of the configurations, the disk winding was large, and the entire static induction machine was large. The purpose of this invention is
The cooling medium 2 is caused to flow in the radial direction in the disk winding without enlarging the disk winding.

[0010]

In order to achieve the above object, according to the present invention, in a structure in which a cooling medium is forcibly fed into a stationary induction electric device composed of a disk winding and an iron core, a circle is provided. A guide for guiding the cooling medium may be provided on the inner diameter side of the plate winding, and the cooling medium may flow from the inner diameter side to the outer diameter side of the disc winding.

Alternatively, in such a structure, a cylindrical winding core is arranged on the inner diameter side of the disk winding, and a plurality of through holes are scattered in the winding core, and the cooling medium is supplied from the inner diameter side of the disk winding. It may be made to flow to the outer diameter side through the through hole of the winding core. Alternatively, in such a configuration, a plurality of disk windings in which static induction electric devices are arranged side by side may be provided, and a partition wall may be interposed between the respective disk windings.

Alternatively, in a structure in which a cooling medium is cooled by forcibly feeding it into a static induction electric device composed of a disk winding and an iron core, a guide for guiding the cooling medium is provided on the outer diameter side of the disk winding. The cooling medium may be made to flow from the outer diameter side to the inner diameter side of the disc winding. Alternatively, in such a configuration, the static induction generator may be an air-core reactor having an iron core outside the disc winding.

Further, in such a structure, the disk winding may be arranged with its axis horizontal.

[0014]

According to the structure of the present invention, the guide for guiding the cooling medium is provided on the inner diameter side of the disc winding, and the cooling medium is caused to flow from the inner diameter side to the outer diameter side of the disc winding. This allows the cooling medium to flow radially outward of the disc winding without the need for enlarging the disc winding.

Further, in such a structure, a cylindrical winding core is arranged on the inner diameter side of the disk winding, and a plurality of through holes are scattered on this winding core. The cooling medium flows from the inner diameter side of the disk winding to the outer diameter side through the through hole of the winding core. The winding core is used when winding the disc winding. By arranging the winding core as it is on the inner diameter side of the disk winding, the work process of extracting the winding core one by one becomes unnecessary.

Further, in this structure, a plurality of disk windings in which static induction electric devices are arranged side by side are provided, and a partition wall is interposed between the respective disk windings. As a result, the cooling medium that escapes from the outer diameter side of the disk winding does not enter the other windings,
Cooling efficiency is increased. Further, a guide for guiding the cooling medium is provided on the outer diameter side of the disk winding, and the cooling medium flows from the outer diameter side to the inner diameter side of the disk winding. This allows the cooling medium to flow radially inward of the disc winding without the need for enlarging the disc winding.

Further, in such a structure, it is assumed that the stationary induction machine is an air-core reactor having an iron core outside the disk winding. Since there is no iron core or other windings on the inner diameter side or outer diameter side of the disk winding in the air-core reactor, there is nothing obstructing the flow of the cooling medium and the cooling medium can easily flow. Thereby, the distribution of the flow rate of the cooling medium flowing into the radial duct of the disk winding becomes uniform, and the cooling efficiency is enhanced.

Further, in such a structure, it is assumed that the disk winding is arranged with its axis horizontal. As a result, even if the axial direction of the disc winding is long, the static induction electric device as a whole can be made low.

[0019]

EXAMPLES The present invention will be described below based on examples. FIG. 1 is a sectional view of one side of a main part showing a cooling structure of a static induction generator according to an embodiment of the present invention. The disk winding 1 is arranged with its axis 36 vertical, and an insulating guide 22 for guiding the cooling medium 2 is provided on the inner diameter side of the disk winding 1. The guide 22 is composed of a cylinder 3, a ring plate 4, and a circular plate 5, and the cooling medium 2 flows as indicated by an arrow.

In FIG. 1, the cooling medium 2 is forcibly guided to the inner diameter side of the disc winding 1 by the cylinder 3 from below.
Further, after the cooling medium 2 is guided outward in the radial duct 42 of the disc winding 1 by the ring plate 4 and the disc 5, the cooling medium 2 is directed upward through the outer diameter side of the disc winding 1. Go out. Since the cooling medium 2 flows through the radial duct 42, a sufficient contact area between the cooling medium 2 and the disk winding 1 is ensured. Therefore, the axial duct in the disk winding 1 and the structure for flowing the cooling medium 2 in zigzag, which are conventionally required, are not required, and the disk winding 1 can be made compact. Therefore, the total size of the stationary induction machine is also reduced.

FIG. 2 is a sectional view of one side of a main part showing a cooling structure of a static induction electric machine according to another embodiment of the present invention.
The disk winding 1 is arranged with the axis 36 vertical, and an insulating guide 23 for guiding the cooling medium 2 to the outer diameter side of the disk winding 1.
Is provided. The guide 23 is composed of the cylinders 6 and 8, the ring plate 9 and the circular plate 7, and the cooling medium 2 flows as shown by the arrow.

In FIG. 2, the cooling medium 2 is forcibly guided from the bottom to the outer diameter side of the disc winding 1 by the cylinders 6 and 8. Further, the cooling medium 2 is guided inward in the radial duct 42 of the disk winding 1 by the ring plate 9 and the disk 7, and then escapes to the upper part via the inner diameter side of the disk winding 1. Go. Also in this case, since the cooling medium 2 flows through the radial duct 42 as in FIG. 1, a sufficient contact area between the cooling medium 2 and the disc winding 1 is secured. Therefore, the disc winding 1 becomes compact.

FIG. 3 is a one-sided cross-sectional view of an essential part showing a cooling structure of a static induction electric machine according to still another embodiment of the present invention. The disk winding 1 is arranged with its shaft 36 horizontal, and an insulating guide 24 for guiding the cooling medium 2 is provided on the inner diameter side of the disk winding 1. The guide 24 includes the left and right cylinders 1.
0 and 10 and ring plates 11 and 11,
The cooling medium 2 flows as shown by the arrow.

In FIG. 3, a cooling medium 2 is provided on the left and right cylinders 1.
It is forcibly guided from the inside of 0 to the inner diameter side of the disk winding 1. Furthermore, after the cooling medium 2 is guided outwards in the radial duct 42 of the disc winding 1 by the ring plate 11,
It goes out through the outer diameter side of the disk winding 1 to the upper part. Also in this case, since the cooling medium 2 flows through the radial duct 42,
A sufficient contact area between the cooling medium 2 and the disc winding 1 is secured. Moreover, since the disk winding 1 is horizontally arranged,
Even if the direction of the axis 36 of the disk winding 1 is long, the total height of the stationary induction machine is low. This allows the ceiling to be low even when installing static induction equipment in buildings or underground substations.

In FIG. 3, one side of the disk winding 1 on the inner diameter side may be closed with an insulating disk, and the cooling medium 2 may be drawn from one cylinder 10. This configuration corresponds exactly to the tilt of FIG. 1 by 90 degrees. FIG. 4 is a cross-sectional view of one side of a main part showing a cooling structure of a static induction electric device according to a further different embodiment of the present invention. Disk winding 1 has axis 36
Is arranged horizontally, and an insulating guide 25 for guiding the cooling medium 2 is provided on the outer diameter side of the disc winding 1.
The guide 25 includes the left and right cylinders 12, 12 and the ring plate 1.
The cooling medium 2 is constituted by 3, 13 and the cylinder 14, and the cooling medium 2 flows as shown by an arrow.

In FIG. 4, the cooling medium 2 is forcedly guided from between the cylinders 14 and 12 to the outer diameter side of the disc winding 1. Further, after the cooling medium 2 is guided inward in the radial duct 42 of the disc winding 1 by the ring plate 13,
It goes out to the left and right through the inner diameter side of the disc winding 1. Also in this case, since the cooling medium 2 flows through the radial duct 42 as in FIG. 3, a sufficient contact area between the cooling medium 2 and the disc winding 1 is ensured, and the disc winding 1 is horizontally arranged. Therefore, even if the direction of the axis 36 of the disc winding 1 is long, the total static induction electric device becomes low.

In FIG. 4, one side of the disk winding 1 on the outer diameter side is closed with an insulating disk, and the cylinder 14 and one cylinder 1 are closed.
The cooling medium 2 may be drawn in from between the two.
This configuration corresponds exactly to a tilt of FIG. 2 by 90 degrees. FIG. 5 is a cross-sectional view of one side of a main portion showing a cooling structure for a static induction electric device according to a further different embodiment of the present invention. The disc winding 1 is arranged with the shaft 36 horizontal, and the disc winding 1
Guide 26 that guides the cooling medium 2 to the inner diameter side of the
And an insulative winding core 17 of the disc winding 1. The guide 26 includes the left and right cylinders 15 and 15 and the ring plate 1.
It is composed of 6 and 16. The structure of the winding core 17 is shown in FIG.

FIG. 6 is a perspective view showing only the winding core 17 shown in FIG. Through holes 18 are scattered in the winding core 17. The winding core 17 is arranged inside when the disc winding 1 is wound, and a conductor wire is wound along the winding core 17 in the winding process. Figure 5
Returning to, the cooling medium 2 flows through the through hole 18 as indicated by the arrow. FIG. 5 corresponds to the configuration of FIG. 3 with the winding core 17 interposed, and the flow of the cooling medium 2 is also the same. Therefore, since the cooling medium 2 flows through the radial duct 42,
The disc winding 1 becomes compact. Generally, the core 17
Is removed after the winding process is completed. Through hole 1 as shown in Figure 6
If the winding cores 17 having the scattered 8 are used, it is not necessary to remove the disk winding 1 from the disk winding 1, and the winding process is shortened.

FIG. 7 is a one-sided sectional view showing the cooling structure of a static induction electric machine according to another embodiment of the present invention. The disk winding 1 is arranged with the shaft 36 horizontal, and an insulating guide 27 for guiding the cooling medium 2 to the outer diameter side of the disk winding 1 and a winding core 17 of the disk winding 1 are provided. It is provided. The guide 27 includes a cylinder 20 and left and right cylinders 21, 21.
It is constituted by and and ring plates 19, 19. The configuration of the winding core 17 is shown in FIG. 6, and the cooling medium 2 flows through the through holes 18. FIG. 7 corresponds to the structure of FIG. 4 in which the winding core 17 is interposed, and the flow of the cooling medium 2 is also the same. Therefore, the cooling medium 2 flows through the radial duct 42, so that the disc winding 1 becomes compact.

FIG. 8 is a sectional view of one side of a main portion showing a cooling structure of a static induction electric machine according to still another embodiment of the present invention. The configuration is the same as that of FIG. 1 except that the winding core 17 of FIG. 6 is interposed on the inner diameter side of the disc winding 1. The cooling medium 2 flows through the through holes 18 as shown by the arrow. Therefore,
Also in this case, the cooling medium 2 flows through the radial duct 42, so that the disc winding 1 becomes compact.

FIG. 9 is a one-sided sectional view showing the cooling structure of a static induction electric machine according to still another embodiment of the present invention. The configuration is the same as that of FIG. 2 except that the winding core 17 of FIG. 6 is provided on the outer diameter side of the disc winding 1. The cooling medium 2 flows through the through holes 18 as shown by the arrow. Therefore,
Also in this case, the cooling medium 2 flows through the radial duct 42, so that the disc winding 1 becomes compact.

FIG. 10 is a side view showing a cooling structure for a static induction electric machine according to still another embodiment of the present invention.
In the three-phase air-core reactor shown in FIG. 13,
An insulating plate-shaped partition wall 45 is interposed between the disk windings 1. The axis 36 of the disc winding 1 may be vertical or horizontal. In addition, the disk winding 1 is shown in FIG. 1, FIG. 3, FIG.
This is effective in the case where the cooling medium 2 escapes from the outer diameter side of the disc winding 1 as described above. That is, the cooling medium 2 that has escaped from the disc winding 1 is guided upward by the partition wall 45 as indicated by the arrow. However, when the disk winding 1 is horizontally arranged, the cooling medium escapes in the direction perpendicular to the paper surface. In the configuration of FIG. 10, the cooling medium does not enter other windings, so that the cooling efficiency is improved. The partition wall 45 does not necessarily have to have a plate shape, and may have a cylindrical shape around which the disc winding 1 is wound. In short, it suffices that the disk windings 1 be partitioned from each other.

Although the disk winding 1 is an air-core reactor in the embodiments shown in FIGS. 1 to 10, the disk winding 1 is a transformer in which the main leg and other windings are arranged. This is also the case, and the cooling medium 2 flows through the radial duct 42, and the disc winding 1 becomes compact. Here, FIG. 11 shows an example of a cooling structure in the case of a transformer, which corresponds to the example of FIG. 1, for example. FIG. 11 is a cross-sectional view of one side of a main portion showing a cooling structure of a still different static induction electric device according to the present invention. An inner diameter side winding 52 and an outer diameter side winding 53, which are different from the disk winding 1, are provided on the inner diameter side and the outer diameter side of the disk winding 1, respectively.
The main leg iron core 51 is inserted into the shaft 36 so as to be coaxial with the shaft 36. In such a transformer configuration, an insulating guide 5 for guiding the cooling medium 2
9 is provided, and the guide 59 is composed of a cylinder 56, rings 57 and 58, an inner diameter side cylinder 54, and an outer diameter side cylinder 55, and the cooling medium 2 flows in the same manner as in FIG. Here, the inner diameter side cylinder 54 and the outer diameter side cylinder 5 are
5, the cooling medium 2 is the inner diameter side winding 52 and the outer diameter side winding 5
3 are arranged coaxially with the disk winding 1 so as not to go to the direction of 3. The insulating barrier between the disc winding 1 and the inner diameter side winding 52 and the outer diameter side winding 53 may also serve as the inner diameter side cylinder 54 and the outer diameter side cylinder 55. Further, in the case of a transformer having only the disc winding 1 and the inner diameter side winding 52, the outer diameter side cylinder 55 is not necessarily required, and a transformer having only the disc winding 1 and the outer diameter side winding 53 is required. In some cases, the inner diameter side cylinder 54 is not always necessary.

[0034]

As described above, according to the present invention, the guide for guiding the cooling medium is provided on the inner diameter side of the disc winding so that the cooling medium flows from the inner diameter side to the outer diameter side of the disc winding. Thereby,
The disk winding 1 becomes compact, and the static induction machine as a whole also becomes small. Further, in such a configuration, a cylindrical winding core is arranged on the inner diameter side of the disc winding, and a plurality of through holes are scattered on this winding core. The cooling medium flows from the inner diameter side of the disk winding to the outer diameter side through the through hole of the winding core. By arranging the winding core used when winding the disk winding on the inner diameter side of the disk winding as it is, the work process of extracting the winding core one by one becomes unnecessary, and the number of steps and cost can be reduced. it can.

Further, in this structure, a partition wall is interposed between the respective disk windings in which the static induction electric devices are arranged side by side. Thereby, the cooling efficiency is increased and the cooling device can be downsized. Further, a guide for guiding the cooling medium is provided on the outer diameter side of the disk winding, and the cooling medium flows from the outer diameter side to the inner diameter side of the disk winding. As a result, the disc winding 1 becomes compact, and the static induction machine as a whole also becomes small.

Alternatively, in such a configuration, it is assumed that the static induction generator is an air-core reactor having an iron core outside the disc winding. Thereby, the flow distribution of the cooling medium flowing in the radial duct of the disc winding becomes uniform. Therefore, the cooling efficiency is increased, and the cooling device can be downsized. Further, in such a configuration, the disk winding is arranged with its axis horizontal. Thereby, when the axial direction of the disk winding is long, the static induction electric device as a whole can be made low. Therefore, when installing a static induction device in a building or underground substation, the ceiling is low and the construction cost can be saved.

[Brief description of drawings]

FIG. 1 is a side sectional view of a main part showing a cooling structure of a static induction electric device according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of one side of a main part showing a cooling structure for a static induction electric machine according to another embodiment of the present invention.

FIG. 3 is a cross-sectional view of one side of a main part showing a cooling structure of a static induction electric device according to still another embodiment of the present invention.

FIG. 4 is a cross-sectional view of one side of a main part showing a cooling structure of a static induction electric device according to still another embodiment of the present invention.

FIG. 5 is a side sectional view of a main part showing a cooling structure of a static induction electric machine according to a further different embodiment of the present invention.

FIG. 6 is a perspective view showing only the winding core of FIG.

FIG. 7 is a cross-sectional view of one side of a main portion showing a cooling structure of a static induction electric device according to a further different embodiment of the present invention.

FIG. 8 is a cross-sectional view of one side of a main part showing a cooling structure of a static induction electric device according to still another embodiment of the present invention.

FIG. 9 is a sectional view of one side of a main part showing a cooling structure of a static induction electric device according to a further different embodiment of the present invention.

FIG. 10 is a side view showing a cooling structure for a static induction electric device according to still another embodiment of the present invention.

FIG. 11 is a sectional view of one side of a main part showing a cooling structure of a static induction electric device according to still another embodiment of the present invention.

FIG. 12 is a cross-sectional view showing the configuration in the case where the static induction electric device is a single-phase air-core reactor.

FIG. 13 is a cross-sectional view showing a configuration in the case where the stationary induction electric device is a three-phase air-core reactor.

FIG. 14 is a cross-sectional view showing a cooling structure of a conventional static induction generator.

FIG. 15 is a cross-sectional view showing a conventional cooling structure for a different static induction electric device

[Explanation of symbols]

1: Disc winding, 2: Cooling medium, 36: Shaft, 22, 23,
24, 25, 26, 27, 59: guide, 17: winding core, 18: through hole, 44, 49: iron core, 51: main landing gear iron core, 52: inner diameter side winding, 53: outer diameter side winding

Claims (6)

[Claims] 1. A structure in which a cooling medium is cooled by forcibly feeding it into a stationary induction machine composed of a disk winding and an iron core, and a guide for guiding the cooling medium is provided on the inner diameter side of the disk winding to cool the cooling medium. A cooling structure for a static induction electric device, characterized in that a medium is made to flow from the inner diameter side to the outer diameter side of a disk winding. 2. The cylindrical winding core according to claim 1, wherein a cylindrical winding core is arranged on the inner diameter side of the disk winding, and a plurality of through holes are scattered in the winding core, and the cooling medium is wound around the disk. A cooling structure for a static induction electric device, comprising: flowing from an inner diameter side of a wire to an outer diameter side through a through hole of a winding core. 3. The method according to claim 1 or 2, wherein
Equipped with a plurality of disk windings in which static induction appliances are arranged side by side,
A cooling structure for a static induction electric device, characterized in that a partition wall is interposed between each disk winding. 4. A structure for cooling by forcibly feeding a cooling medium into a static induction electric device comprising a disk winding and an iron core, wherein a guide for guiding the cooling medium is provided on the outer diameter side of the disk winding. A cooling structure for a static induction electric device, wherein a cooling medium is made to flow from the outer diameter side of the disc winding toward the inner diameter side. 5. The method according to claim 1, wherein
A cooling structure for a static induction device, wherein the static induction device is an air-core reactor having an iron core outside a disk winding. 6. The method according to claim 1, wherein:
A cooling structure for a static induction electric device, wherein the disk windings are arranged with their axes horizontal.