JPH07272945A - Core-leg structure of reactor - Google Patents

Abstract

PURPOSE:To obtain a core-leg structure in which a block core constituting a core leg for a reactor is cooled by a cooling medium with good efficiency. CONSTITUTION:Dam members 5 by which the flow of a part of a cooling medium flowing from the lower part is changed so as to be directed to the inside of an insulating tube 4 are installed on the inner circumferential face of the insulating tube 4 surrounding a core leg 3. The cooling medium whose direction of the flow has been changed comes into contact with the surface and the rear surface of a block core. Thereby, the block core is cooled with good efficiency.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reactor core leg structure.

[0002]

2. Description of the Related Art As is well known, an iron core leg of a reactor is constructed by stacking a plurality of block iron cores via gaps. Then, the core leg is surrounded by an insulating cylinder, and the winding of the reactor is wound around the outer circumference of the insulating cylinder. FIG. 3 and FIG. 4 show the conventional structure thereof, and 1 is a block iron core, and a plurality of the iron cores are stacked via gap spacers 2 to form an iron core leg 3. Reference numeral 4 is an insulating cylinder surrounding the iron core leg 3. The reactor winding is wound around the insulating cylinder 4.

In the iron core leg structure having such a structure, an insulating cooling medium such as insulating oil or insulating gas is forcibly circulated inside the insulating cylinder 4 for the purpose of cooling the block iron core 1. There is. This cooling medium flows upward as indicated by the arrow. In this case, since there is nothing that blocks the flow of the cooling medium, the cooling medium flows in a substantially vertical direction.

Therefore, although the side surface of each block core 1 is in contact with the cooling medium to be cooled, there is little chance that the cooling medium contacts the upper surface and the lower surface thereof, and therefore the block core 1 cannot be cooled efficiently. Conventionally, in order to sufficiently cool the block core 1, measures such as increasing the air volume of the blower for forcibly feeding the cooling medium to increase the flow velocity of the cooling medium have been taken. The upper and lower surfaces of No. 1 cannot be cooled sufficiently.

[0005]

SUMMARY OF THE INVENTION According to the present invention, in cooling a plurality of block cores which are stacked in multiple stages via gaps and which constitute core legs of a reactor by a flow of a cooling medium, the block cores are cooled. It is intended to efficiently cool the block core by allowing the cooling medium to flow sufficiently not only on the side surface but also on the upper and lower surfaces thereof.

[0006]

SUMMARY OF THE INVENTION The present invention provides a weir member for directing a flow of a cooling medium flowing from below into the inside of an insulating cylinder on an inner peripheral surface of the insulating cylinder surrounding an iron core leg. It is characterized by being provided.

[0007]

A part of the cooling medium flowing from below flows upward between the inner peripheral edge of the weir member and the side surface of the block core. The side surface of the block core is cooled by touching the side surface of the block core with the cooling medium of this flow. The flow of the other part of the cooling medium is changed by the dam member so as to flow toward the inside of the insulating cylinder. The flow-changed cooling medium goes toward the upper surface or the lower surface of the block core, thereby cooling the upper surface and the lower surface of the block core.

[0008]

Embodiments of the present invention will be described with reference to FIGS. In addition, the portions denoted by the same reference numerals as those in FIGS. 3 and 4 indicate the same or corresponding portions. The block core 1 is composed of a radial core, a stepped core, a wound core, or the like, and has a disc shape. The gap spacer 2 is made of, for example, ceramic, and the presence of the gap spacer 2 between the block cores 1 forms a required gap. The insulating cylinder 4 is made of a press board, epoxy resin, or the like.

According to the present invention, a weir member 5 made of an insulating material such as a press board and an epoxy resin and formed in a plate shape is attached to the inner circumference of the insulating cylinder 4. The dam member 5 is attached by, for example, an adhesive, or a groove is provided on the inner circumference of the insulating cylinder 4, and the outer circumference of the dam member 5 is fitted into the groove.

A space 7 is formed between the inner peripheral edge 6 of the dam member 5 and the side surface of the block core 1. In the configuration example shown in the drawing, a part of the inner peripheral edge 6 is extended to form a plurality of extension portions 8, and the extension portions 8 are engaged so as to be placed on the upper surface of the block core 1. By doing so, the position of the weir member 5 on the inner peripheral edge side is stable and convenient.

In the above structure, part of the cooling medium flowing from below flows upward through the space 7 between the inner peripheral edge 6 of the dam member 5 and the side surface of the block core 1. By touching the side surface of the block core 1 with the cooling medium of this flow, the side surface of the block core 1 is cooled.

However, another part of the cooling medium, especially the insulating cylinder 4
The cooling medium flowing upward along the portion close to the inner peripheral surface of is changed by the dam member 5 so that the direction of the flow is toward the inside of the insulating cylinder 4 as indicated by the arrow in the figure. The cooling medium whose flow has been changed in this way travels between the block cores 1 so that the cooling medium comes into contact with the upper surface and the lower surface of the block core 1. As a result, the upper surface and the lower surface of the block core 1 are cooled.

[0013]

As described above, according to the present invention, when the block core forming the iron core leg of the reactor is cooled by the cooling medium, the flow of the cooling medium flows to the inner circumference of the insulating cylinder surrounding the iron core leg. Since the weir member that changes the direction toward the inside of the insulating cylinder is provided, the cooling medium flows not only on the side surface of the block core but also on the upper and lower surfaces thereof, thereby efficiently cooling the block core. There is an effect that can.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of the present invention.

2 is a cross-sectional view of FIG.

FIG. 3 is a vertical sectional view of a conventional example.

4 is a cross-sectional view of FIG.

[Explanation of symbols]

 1 Block Iron Core 2 Gap Spacer 3 Iron Core Leg 4 Insulating Cylinder 5 Weir Member 6 Inner Perimeter Edge 7 Space

Claims (1)

[Claims] 1. A reactor iron core leg structure, comprising: an iron core leg formed by stacking a plurality of block cores through a gap; and an insulating cylinder surrounding a periphery of the iron core leg. A reactor core leg structure comprising a weir member for directing a flow of a cooling medium flowing from below to the inside of the insulating cylinder on an inner peripheral surface.