JPH088126A - Winding structure for induction electromagnetic device - Google Patents

Abstract

PURPOSE:To uniformly cool a winding to be used in an induction electromagnetic device and reduce the max. point temp. in the winding. CONSTITUTION:Many sections 1A-1E stacked in multiple stages between an inner and outer insulation tubes 2 and 3 are partitioned into groups of plural sections. Flow gaps 10 and 10A are formed between the insides of the lowermost sections and inner insulation tube 2 and between the outsides of the lowermost sections and outer insulation tube 3 alternately at the adjacent groups. Deflecting members 11 and 11A are disposed near the flow gaps 10 and 10A so that a coolant passing through the flow gaps 10 and 10A may flow gradiently to the partitioned sections. Spacers 12 and 12A to block the coolant from flowing are formed each between the opposite side face of each lowermost section to the side face which forms the flow gap 10 and inner or outer insulation tube 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a winding structure used for an induction electromagnetic device such as a transformer or a reactor.

[0002]

2. Description of the Related Art A disk winding may be used as a winding structure used in an induction magnet.
Usually, a plurality of windings are stacked in multiple stages to form a winding structure. Then, a plurality of sections, each of which is formed by winding the disk, are arranged between the inner insulating cylinder and the outer insulating cylinder.

Since heat is generated in the winding due to resistance loss or the like, in order to cool it, an insulating cooling medium such as insulating gas or oil is forcibly circulated from below with a blower or a pump. ing. Due to the circulation, a plurality of sections are formed by alternately partitioning both insulating cylinders by a disc-shaped inner barrier and an outer barrier for each section to form a plurality of areas, and between the inner barrier and the inner insulating cylinder and outside. A configuration is known in which a flow gap is formed between the barrier and the inner insulating cylinder so that the insulating medium flows in a staggered manner in each area.

According to the cooling mechanism having such a configuration, there is a large imbalance in the flow velocity of the cooling medium along the vertical direction, and therefore the cooling effect becomes worse in the lower section in one area. The present inventor has previously proposed a configuration in which a rectifying member is provided in each of the flow gaps, and the cooling medium that has risen after passing through the flow gaps flows obliquely to the section side and positively touches the section. Proposed (Japanese Patent Application No. 6-39052).

This structure will be described with reference to FIG. 9. Reference numeral 1 is a plurality of sections each of which is formed of a disk winding, 2 is an inner insulating cylinder, 3 is an outer insulating cylinder, and a section is provided between both insulating cylinders 2 and 3. 1 is placed. Each section 1
Each of the plurality of barriers is alternately partitioned by the inner barrier 4 and the outer barrier 5, and a plurality of areas are formed with one area between the adjacent barriers 4 and 5. The inner barrier 4 has its inner circumference attached to the outer circumference of the inner insulating cylinder 2, and the outer barrier 5 has its outer circumference attached to the inner circumference of the outer insulating cylinder 3.

Then, flow gaps 6 and 7 are formed between the inner barrier 4 and the outer insulating cylinder 3 and between the outer barrier 5 and the inner insulating cylinder 2, respectively. Since the flow gaps 6 and 7 are alternately located on the outer insulating cylinder 3 side and the inner insulating cylinder 2 side,
The insulating medium sent from below flows in a zigzag manner between the insulating cylinders 2 and 3. The arrow indicates the flow of the insulating medium. In addition to this structure, in the already proposed structure, the flow gap 6 is provided with a flow fold member 8 on the outer insulating cylinder 3 side, and the flow gap 7 is provided with a flow fold member 9 on the inner insulating cylinder 2 side.

According to this structure, the flow gaps 6 and 7 are
The cooling medium sent from below to the diverting member 8,
When it collides with 9, the flow becomes inclined to the section 1 side. Therefore, the flow of the cooling medium is bent toward the section on the lower stage side of the sections 1 stacked in multiple stages, whereby the flow velocity of the cooling medium increases between the sections on the lower stage side. As a result, the imbalance in the flow velocity of the cooling medium between the upper and lower sections is reduced, and the temperature difference is averaged. Therefore, the maximum temperature in the winding is low.

However, even in such a structure, the flow of the cooling medium is slower in the vicinity of the section located at the lowermost stage of the area partitioned by the respective barriers, as compared with the vicinity of the section in the upper stage. Although the temperature is lower than that of the conventional structure that does not have the flow diverting member,
The temperature of the bottom section is higher than that of other sections. That is, the temperature of the lowermost section becomes the highest point temperature, and the cross-sectional area of the winding is determined by this, so that further promotion of the cooling effect is desired.

[0009]

SUMMARY OF THE INVENTION According to the present invention, when cooling a large number of sections which are stacked in multiple stages between an inner insulating cylinder and an outer insulating cylinder by circulating a cooling medium,
The purpose is to equalize the temperature rise in the sections of each stage.

[0010]

SUMMARY OF THE INVENTION According to the present invention, a large number of sections stacked in multiple stages between an inner insulating cylinder and an outer insulating cylinder are divided into a plurality of sections. Between the side surface of the lower section and one of the inner or outer insulating cylinders, the flow gap of the cooling medium supplied from below is alternated between the inner insulating cylinder side and the outer insulating cylinder side for each adjacent section. In order to allow the cooling medium that passes through each of the flow gaps to flow in an inclined manner toward each of the sectioned sections, a flow fold member is provided in the vicinity of each of the flow gaps and in an insulating cylinder that forms the flow gap. Is provided, and a spacer for blocking the flow of the cooling medium is provided between the insulating cylinder and the side surface opposite to the side surface forming the flow gap of each of the lowermost sections.

[0011]

In the structure shown in FIG. 9, the inner barrier and the outer barrier are provided so that the cooling medium flows in a staggered manner. However, in the present invention, each of these barriers is not used, and a section is used instead of this barrier. are doing. That is, the lowermost section of the sectioned sections is used as the inner and outer barriers. That is, a flow gap is formed between the side surface of the bottom section and the outer insulating cylinder and the inner insulating cylinder, and a flow diverting member is provided in this flow gap as in the configuration shown in FIG.

A spacer for blocking the flow of the cooling medium is provided on the side surface of the section opposite to the flow gap. As a result, the cooling medium flows in a zigzag manner between the two insulating cylinders. On the other hand, since the flow diverting member is installed in the flow gap, the cooling medium flows so as to touch not only the upper surface of the lowermost section but also the lower surface thereof. As a result, the bottom section is cooled efficiently.

[0013]

Embodiment An embodiment of the present invention will be described with reference to FIG. In addition, the parts given the same reference numerals as those in FIG. 9 indicate the same or corresponding parts. According to the present invention, a large number of sections stacked in multiple stages are divided into a plurality of sections.
The example of FIG. 1 shows a configuration in which five sections 1A to 1E are divided into one section. Then, between the lowermost section 1A of the divided sections and the inner insulating cylinder 2,
A flow gap 10 is formed. From this, the next flow gap 10A is formed between the outermost insulating section 3 and the lowermost section 1A of the partition portion in the next upper stage.

As described above, the flow gaps 10 and 10A are alternately formed on the inner insulating cylinder 2 side and the outer insulating cylinder 3 side in adjacent sections along the vertical direction. Each circulation gap 10, 10A
The flow diverting member 11 is provided in the inner or outer insulating cylinder in the vicinity of each of the flow gaps 10 and 10A so as to allow the cooling medium passing therethrough to incline toward each section section. , 11A are provided. Spacers 12 and 12A for blocking the flow of the cooling medium are provided between the side surface of the section 1A where the flow gap is not formed and the inner insulating cylinder 2 or the outer insulating cylinder 3.

In the above structure, the cooling medium passing through the flow gap 10 formed between, for example, the lowermost section 1A and the inner insulating cylinder 2 is caused by the flow diverting member 11 provided in the flow gap 10. A part of the flow flows so as to incline toward the upper section 1B. This operation is the same as the already proposed configuration shown in FIG. The cooling medium rises as it is to the lowermost section 1A of the upper section.

At this time, the spacers 12A block the cooling medium flowing along the inner insulating cylinder 2, so that the cooling medium becomes the section 1A and the outer insulating cylinder 3 as shown by the arrows in the figure.
Flows toward the flow gap 10A between the and. By this flow, the cooling medium comes into contact with the lower surface of the section 1A and cools it. A part of the cooling medium passing through the flow gap 10A is also partly formed by the flow diverting member 11A in the upper section 1B.
It flows so as to tilt to the side.

In this way, the cooling medium flows in a zigzag manner between the inner insulating cylinder 2 and the outer insulating cylinder 3 and rises, and by this flow of the cooling medium, each sectioned section is at the lowest stage. The ones from the top to the top are cooled almost evenly. As a result, the temperature rise in the bottom section is reduced.

FIG. 2 shows a specific structure for the flow fold member and the spacer. Vertical spacers 13 and 14 are attached to the outer periphery of the inner insulating cylinder 2 and the inner side of the outer insulating cylinder 3 so as to face each other at appropriate intervals. In order to maintain an appropriate spacing between the sections stacked in multiple stages, the lateral spacers 15 are arranged at appropriate intervals along the circumferential direction of the sections. Both ends of the horizontal spacer 15 are supported by the vertical spacers 13 and 14.

Between the adjoining vertical spaces 13, the flow fold members 11 are arranged so that the flow gaps 10 are formed with respect to the section 1A, and the horizontal spacers are arranged vertically as shown in FIG. Supporting to intervene between 15. Similarly, the spacers 12 are arranged between the adjacent vertical spaces 14 so as to fill the gap between the outer insulating cylinder 3 and the section 1, and are also supported by being sandwiched between the horizontal spacers 15 arranged vertically. . The structure shown in FIG. 2 is an example in which the flow gap 10 is formed, but in order to form the flow gap 10A, a spacer 12 is arranged on the inner insulating cylinder 2 side and a flow diverting member 11A is arranged on the outer insulating cylinder 3 side. Good.

FIG. 4 shows another specific structure. In this example, the flow fold member 11 and the spacer 1 are provided on the bottom surface of the section 1A.
2 is provided. Here, as shown in FIGS. 5 and 6, the flow diverting member 11 and the spacer 12 are ring-shaped.
A groove 16 is formed on the outer periphery of the spacer 12 shown in FIG. 5, and the vertical spacer 14 is fitted in the groove 16 and is also fitted in the step portion 17 formed in the horizontal spacer 15. In this state, section and horizontal spacer 15
It is sandwiched and supported by.

The flow diverting member 11 shown in FIG. 6 is also formed so as to project a groove 18 opening toward the inner circumference thereof toward the outer circumference. Step portion 19 formed on the spacer 15
It is fitted in. In this state, the section and the lateral spacers 15 sandwich and support the section.

The shapes shown in FIGS. 5 and 6 are structures in which the flow gap 10 is formed. When the flow gap 10A is formed, the groove 16 is formed inside instead of the spacer 12 shown in FIG. The spacer 12A may be used as the spacer 12A, and instead of the flow diverting member 11 shown in FIG. 6, the flow fold member 11A may be formed by forming a groove 18 that is open outward and projects inward.

Next, an experimental example of the present invention will be described. A winding having 48 turns was set as one section, and 40 sections thereof were stacked in the axial direction, and this was divided into 5 sections, and 8 sections were arranged in each section. As a result of actually measuring the temperature rise value with respect to the gas temperature of the sections No. 1 to No. 8 (see FIG. 8) when a current of 3.4 A per 1 square millimeter of the rated current density is passed through this winding structure, as shown in Table 1. Results were obtained. For comparison, the measured values in the previously proposed configuration are also shown.

[0024]

[Table 1]

As will be understood from the following, in the proposed structure, the lowest temperature section having the highest temperature is
According to the present invention, the maximum temperature can be reduced by cooling it by about half,
In addition, the temperature of each section can be made almost uniform.

[0026]

As described above, according to the present invention, the cooling medium is caused to flow between the respective sections which are stacked between the inner insulating cylinder and the outer insulating cylinder to cool each section. The temperature between the sections can be averaged and the maximum temperature in the section can be reduced as compared with the already proposed configuration using the above.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view showing an embodiment of the present invention.

FIG. 2 is a partial plan view of FIG.

FIG. 3 is a partial cross-sectional view of FIG.

FIG. 4 is a partial cross-sectional view showing another embodiment of the present invention.

5 is a partial plan view showing the spacer of FIG. 4. FIG.

6 is a partial plan view showing the flow fold member of FIG. 4. FIG.

FIG. 7 is a partial cross-sectional view of FIG.

FIG. 8 is a partial cross-sectional view for explaining the operation of the present invention.

[Explanation of symbols]

 1A to 1E Section 2 Inner Insulation Cylinder 3 Outer Insulation Cylinder 10, 10A Flow Gap 11, 11A Bending Flow Member 12, 12A Spacer

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[Procedure amendment]

[Submission date] October 7, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Brief description of the drawing

[Correction method] Change

[Correction content]

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view showing an embodiment of the present invention.

FIG. 2 is a partial plan view of FIG.

FIG. 3 is a partial cross-sectional view of FIG.

FIG. 4 is a partial cross-sectional view showing another embodiment of the present invention.

5 is a partial plan view showing the spacer of FIG. 4. FIG.

6 is a partial plan view showing the flow fold member of FIG. 4. FIG.

FIG. 7 is a partial cross-sectional view of FIG.

FIG. 8 is a partial cross-sectional view for explaining the operation of the present invention.

FIG. 9 is a partial cross-sectional view showing an already proposed configuration.

[Explanation of Codes] 1A to 1E Section 2 Inner Insulation Tube 3 Outer Insulation Tube 10, 10A Flow Gap 11, 11A Folding Member 12, 12A Spacer

Claims (1)

[Claims] 1. A plurality of sections stacked in multiple stages between an inner insulating cylinder and an outer insulating cylinder are divided into a plurality of sections, and the side surface and the inner side of the lowermost section of the divided sections, or Between one of the outer insulating cylinders, a flow gap of the cooling medium supplied from below is alternately formed on the inner insulating cylinder side and the outer insulating cylinder side for each adjacent section, and each flow gap is formed. In order to allow the passing cooling medium to incline toward each sectioned section, a rectifying member is provided in the insulating cylinder that is near each flow gap and forms the flow gap, and each lowermost section A winding structure for an induction ceramic in which a spacer for blocking the flow of a cooling medium is provided between a side surface on the side opposite to the side surface forming the flow gap and the insulating cylinder.