JP7115432B2 - Static induction device and static induction device manufacturing method - Google Patents

Description

The present invention relates to static induction devices such as transformers and reactors, and methods for manufacturing static induction devices.

Static induction devices generate heat during use and must be cooled. The iron core and windings are put in a case and immersed in a cooling medium filled in the case. The heat generated from the windings is transmitted through the cooling medium and radiated to the surroundings of the case through the case. In order to increase the cooling efficiency of the windings, passages are provided in the windings, and a cooling medium is configured to pass through the passages.

Japanese Patent Laid-Open No. 50-32430 Japanese Patent Laid-Open No. 52-51526

According to Patent Document 1, the cooling efficiency is enhanced by providing a flow path in the winding and further providing a flow path in the winding support member. However, in the technique disclosed in Patent Document 1, since the flow path of the winding and the flow path of the winding support member are not positioned, there is a possibility that the flow path of the winding and the flow path of the winding support member are misaligned. Further, in Patent Document 2, there is a technique in which a cylindrical insulator is inserted into an insulating support member below windings, and a cooling medium is passed through the cylindrical insulator in the insulating support member. However, as in Patent Document 1, the channels in the winding and the channels in the insulating support member are not positioned, so there is a possibility of misalignment. SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a stationary induction device having a simple configuration and provided with flow paths that are aligned without deviation in the windings and in the winding support member.

In this invention, an iron core, a winding wound around the iron core, and an inter-winding flow path are formed by being wound in the winding so as to be parallel to the axial direction of winding the winding, and the flow path is formed below the winding. A spacer having a protruded protrusion and a hole vertically penetrating through the spacer form a winding support member internal flow path communicating with the inter-winding flow path by inserting the protrusion into the hole. A case comprising a winding support member, a core, a spacer, and a winding support member therein, and filled with a cooling medium passing through an inter-winding flow path and a flow path in the winding support member. It is a thing.

Interwinding passages are formed by winding spacers in the windings, protruding portions are provided downward, and the passages in the winding supporting member are formed by inserting the protruding portions into the holes of the winding supporting member. is formed, it is possible to provide flow paths that are aligned without deviation in the windings and the winding support member with a simple configuration.

1 is a front view of a stationary induction device according to Embodiment 1. FIG. 1 is a side view of a stationary induction device according to Embodiment 1. FIG. 2 is a top view of the core and windings of the stationary induction device according to Embodiment 1. FIG. 3 is a side view of the windings and spacers of the stationary induction device according to Embodiment 1. FIG. 4 is a diagram showing a winding support member of the static induction device according to Embodiment 1; FIG. FIG. 4 is a diagram showing projections inserted into holes of the winding support member of the stationary induction device according to Embodiment 1; FIG. 10 is a top view of the stationary induction device according to Embodiment 2, in which spacers are inserted into the windings; FIG. 11 is a top view of the stationary induction device according to the second embodiment, in which the protruding portion is inserted into the winding support member;

Embodiment 1.
FIG. 1 is a front view of a stationary induction device 1 according to Embodiment 1. FIG. The stationary induction device 1 of this embodiment is a three-phase transformer. A stationary induction device 1 includes a case 2 in which an iron core 4, a winding 5 wound around the iron core 4, a winding support member 6 for supporting the winding 5, and an iron core base 7 are installed, and a cooling medium 3 is filled. It is sealed by a case lid 201 . The windings 5 are wound around the iron core 4 in a horizontal direction with respect to gravity, and are supported by winding support members 6 at two points so that the windings 5 are not deformed by gravity. The winding support member 6 consists of an insulating material, for example wood. Here, the direction in which gravity is applied is the downward direction of the stationary induction device 1, the opposite direction is the upward direction, and the direction perpendicular to the vertical direction is the horizontal direction. The upper surface of the core base 7 is in contact with the core 4 and the winding support member 6 , and the lower surface is in contact with the case 2 . Heat generated from the winding 5 is radiated around the case through the cooling medium 3 and the case 2 . The case 2 is provided with cooling fins 202 that are horizontally convex so as to efficiently dissipate heat.

FIG. 2 is a side view of the stationary induction device 1 according to Embodiment 1. FIG. The core pedestal 7 below the winding support member 6 consists of a conductor. The core base 7 has a hollow rectangular parallelepiped shape without a part of the upper surface in contact with the winding support member 6 and two opposing side surfaces. It consists of two upper plates 703 facing the bottom plate. The top plate 703 is in contact with the winding support member 6 and the bottom plate 701 is in contact with the iron core 4 and the case 2 . An opening 702 on the upper surface of the core base 7 is positioned so as to overlap with a hole 10 of the winding support member 6, which will be described later. A space surrounded by the bottom plate 701 , the two side plates 704 , and the top plate 703 of the core base 7 , in other words, the hollow inside of the core base 7 serves as a flow path for the cooling medium 3 .

FIG. 3 is a top view of the iron core 4 and windings 5. FIG. Two spacers 8 are inserted in the winding 5 with an interval therebetween in the vertical direction. The spacer 8 is an elongated bar and made of an insulating material such as wood. The spacer 8 is inserted by being wound around the winding 5 in a direction parallel to the axial direction in which the winding 5 is wound. Specifically, the winding 5 is wound around the iron core 4 to the position A in FIG. Next, two spacers 8 are arranged at intervals so as to be in contact with the outside of the winding 5 and parallel to the axial direction in which the winding 5 is wound. After that, the continuation of the winding 5 is wound up to the position A'. As a result, an inter-winding flow path 9 is secured in the winding 5 in a region surrounded by the winding 5 and the spacer 8 . Although the spacer 8 is arranged parallel to the axial direction in which the winding 5 is wound, it may be arranged obliquely, for example. It is sufficient if the cooling medium 3 can move in a direction parallel to the axial direction. 4 is a side view of the winding 5 and the spacer 8 of the stationary induction device 1 according to Embodiment 1. FIG. The spacer 8 inserted into the winding 5 has a projecting portion 801 projecting downward of the winding 5 . In other words, the protrusion 801 protrudes from the winding 5 in a direction parallel to the axial direction in which the winding 5 is wound.

FIG. 5-(a) is a top view of the winding support member 6 of the stationary induction device 1 according to Embodiment 1. FIG. FIG. 5-(b) is a side view of the winding support member 6 of the stationary induction device 1 according to Embodiment 1 (viewed from the paper side of FIG. 2). FIG. 5-(c) is a front view of the stationary induction device 1 according to Embodiment 1 (viewed from the paper surface side of FIG. 1). The winding support member 6 has a hole portion 10 penetrating vertically. It should be noted that although the hole portion 10 penetrates in the vertical direction, it does not have to be completely vertical, and includes a case where it penetrates slightly obliquely, for example. In short, it suffices if the cooling medium 3 can move in the vertical direction. The holes 10 are indicated by dotted lines in FIGS. 5-(b) and 5-(c).

Next, a manufacturing process of the stationary induction device 1 according to the present embodiment will be described. The stationary induction device 1 according to this embodiment is manufactured by the following steps.
(1) The winding 5 is wound halfway around the iron core 4, and two spacers 8 are spaced apart from each other so as to be in contact with the outside of the winding 5 and parallel to the axial direction in which the winding 5 is wound. Then the continuation of the winding 5 is wound up to the position A'. At that time, the spacer 8 is made to have a projecting portion 801 downward of the winding 5 .
(2) A hole 10 is provided in the winding support member 6 . The hole 10 must be sized and positioned to include locations corresponding to the plurality of protrusions 801 .
(3) The protrusion 801 of (1) is inserted into the hole 10 of (2) to form a flow path in the winding support member, which is installed on the core base 7 . At this time, the core base 7 is installed so that the opening 702 corresponds to the hole 10 .
(4) Place (3) in the case 2, fill the cooling medium 3, and close the lid.
The order of (1) and (2) may be reversed, and (4) may be installed after filling the case 2 with the cooling medium 3 (3).

FIG. 6 is a view of the protrusion 801 of the spacer 8 inserted into the hole 10 of the winding support member 6 of the stationary induction device 1 according to Embodiment 1. As shown in FIG. A region of the hole portion 10 between the plurality of projecting portions 801 becomes the winding support member internal flow path 11 . By inserting the protruding portion 801 into the hole portion 10, the winding support member internal flow path 11 communicates with the inter-winding flow path 9 in the vertical direction, thereby preventing displacement.

The flow of the cooling medium in the stationary induction device 1 according to Embodiment 1 will be described with reference to FIG. The heat emitted from the windings 5 raises the temperature of the cooling medium 3 in the inter-winding passages 9 . The cooling medium 3 whose temperature has risen flows through the inter-winding flow path 9 to the upper part of the case 2 . Among the cooling medium 3 in the case 2, the cooling medium 3 with a lower temperature enters the hollow of the core base 7 from the horizontal direction, and flows through the winding support member internal flow path 11 vertically penetrating the winding support member 6. It flows into the inter-winding channel 9 as follows. That is, since the winding support member internal flow path 11 of the winding support member 6 and the inter-winding flow path 9 penetrate vertically, the cooling efficiency can be increased.

In the stationary induction device 1 configured as described above, the spacer 8 is wound in the winding 5, the projecting portion 801 projecting downward is provided, and the projecting portion 801 is inserted into the hole portion 10 of the winding support member 6. Thus, the inter-winding flow path 9 and the winding support member internal flow path 11 can be vertically penetrated. In other words, by inserting the projection 801 at the bottom of the spacer 8 inserted into the winding 5 into the hole 10 of the winding support member 6, the flow path 9 between the windings and the flow path 11 in the winding support member are aligned without being vertically displaced, and serve as flow paths for the cooling medium. Therefore, in the present invention, the flow path of the cooling medium 3 in the winding 5 and the flow path in the winding support member can be easily positioned with a simple structure, and the winding and the winding support member can be easily positioned with a simple structure. A flow path can be provided that does not shift inside. In the present embodiment, two inter-winding passages 9 and two winding support member internal passages 11 are provided, but each may be provided at one location or at three or more locations. It suffices if there are the same number of inter-winding passages 9 and the same number of winding support member inner passages 11 as there are inter-winding passages 9 . If it is one place, the cooling efficiency can be improved with a simple manufacturing process. If there are three or more points, more flow paths for the cooling medium 3 can be secured, and the cooling efficiency can be further improved.

Further, in the present embodiment, two spacers 8 are used, but an additional spacer 8 may be provided between them. In that case, an effect similar to that of the present embodiment can be obtained. Further, the core base 7 may have any shape as long as it has an opening on the surface corresponding to the hole 10 of the winding support member 6 and is hollow. Even in that case, the same effects as in the present embodiment can be obtained.

Embodiment 2.
In the first embodiment, the spacer 8 has an elongated bar shape, but the spacer 80 in this embodiment has a rectangular tubular shape. Even when this embodiment is used, the same effects as those of the first embodiment can be obtained. Since the material of the spacer 8 and other configurations are the same as those of the first embodiment, description thereof is omitted. FIG. 7 is a top view in which a spacer 80 is inserted into the winding 5 of the stationary induction device according to Embodiment 2. FIG. A rectangular tubular spacer 80 is wrapped around the winding 5 in a direction parallel to the axial direction in which the winding 5 is wound, and protrudes from the bottom of the winding 5 . The inter-winding flow path 90 in the second embodiment is inside the cylinder of the spacer 80 . FIG. 8 is a top view of the stationary induction device according to the second embodiment, in which the projecting portion 802 of the spacer 80 is inserted into the winding support member 60. As shown in FIG. The winding support member internal flow path 110 in the second embodiment is inside the cylinder of the projecting portion 802 .

In the manufacturing process, the hole portion 100 of the winding support member 60 is provided with a size that allows the projection portion 802 to enter the position corresponding to the projection portion 802 . With the above configuration, the inter-winding flow path 90 and the winding support member internal flow path 110 can be vertically penetrated simply by inserting the projecting portion 802 into the hole portion 100. An effect similar to that of 1 can be obtained. In this embodiment, one spacer 80 is provided, but a plurality of spacers may be provided. In that case, more cooling passages than one can be secured, and the cooling efficiency can be improved. Further, although the spacer 80 has a rectangular tubular shape in the present embodiment, it may have a cylindrical shape. Furthermore, the horizontal cross-section of the spacer 80 may have a shape other than a circle or a square. In short, it is sufficient that it is hollow and has upper and lower surfaces open so that the cooling medium can pass therethrough.

The configuration shown in the above embodiment shows an example of the contents of the present invention, and it is possible to combine it with another known technology, and one configuration can be used without departing from the scope of the present invention. It is also possible to omit or change the part.

REFERENCE SIGNS LIST 1 stationary induction device 2 case 3 cooling medium 4 iron core 5 winding 6 winding support member 7 iron core base 8 spacer 9 flow path between windings 10 hole 11 winding support member inner flow Path, 801 Protrusion.

Claims (5)

iron core and
a winding wound around the core;
a spacer having a projecting portion that forms an inter-winding flow path by being wound around the winding so as to be parallel to the axial direction in which the winding is wound, and projects downward from the winding;
a winding support member having a hole vertically penetrating therethrough, wherein the protruding portion is inserted into the hole to form a winding support member internal flow path communicating with the inter-winding flow path;
A stationary induction device comprising the iron core, the spacer, the winding support member therein, and a case filled with a cooling medium passing through the inter-winding flow path and the winding support member internal flow path. 2. The stationary induction device according to claim 1, wherein a plurality of said spacers are arranged at intervals, and said windings and said plurality of spacers form said winding-to-winding passages. 2. The stationary induction device according to claim 1, wherein said spacer is hollow and has open upper and lower surfaces. The stationary induction device according to any one of claims 1 to 3, further comprising a hollow iron core base installed under the winding support member and having an opening on a surface corresponding to the hole. a step of winding a winding around an iron core;
arranging a spacer in a direction parallel to the axial direction in which the winding is wound so as to contact the outer side of the winding and have a protruding portion projecting from the lower portion of the winding;
Forming an inter-winding flow path by further winding the winding;
A method of manufacturing a stationary induction device, comprising: inserting the protruding portion into a hole of the winding support member to form a flow path in the winding support member.

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