JP6505616B2 - Stationary induction equipment - Google Patents

Description

  The present invention relates to heat dissipation technology of stationary induction devices such as transformers and reactors.

  In stationary induction devices such as transformers and reactors, heat is generated by passing a current through a coil. Therefore, various heat dissipation mechanisms are provided.

  Patent Document 1 discloses a water-cooled transformer in which the surface temperature is reduced by suppressing the heat transfer to the transformer cover. According to this patent document 1, “the heat released from the iron core to the outside is absorbed by the cooling member, and the heat is transferred from the cooling member to the secondary coil member. The secondary coil has a cooling water passage therein. It is described as “efficiently cooled”.

JP, 2008-177184, A

  In the said patent document 1, it has taken the structure which cools by transferring heat to a cooling channel via a cooling member which covers an iron core inside a transformer and is connected to the secondary coil. However, in the structure of Patent Document 1, when the cooling water passage is not provided, the cooling efficiency is significantly reduced, and heat is transferred to the secondary coil, so a temperature rise of the secondary coil is expected. In addition, since the cooling member is installed between the transformer main body and the cover, there is a problem that heat radiation from the transformer cover can not be expected. In addition, there is a problem that the internal pressure fluctuation of the tank portion of the transformer occurs with the temperature rise.

  Also, in an oil-filled transformer containing an iron core-coil assembly in a tank and containing electrically insulating oil, a highly thermally insulating air layer exists between the oil layer in the tank and the cover of the tank, The heat dissipation from the cover is considered to be extremely low. Such a subject is common to stationary induction apparatuses, such as not only a transformer but a reactor.

  The present invention is capable of releasing the heat possessed by the electrical insulating oil above the content of the static induction device to the outside of the tank without having a cooling channel, and capable of suppressing the internal pressure fluctuation of the tank portion. The purpose is to provide equipment.

In order to solve the above-mentioned subject, composition indicated in a claim is adopted.
The present application includes a plurality of means for solving the above-mentioned problems, and one example thereof is a stationary induction device in which an iron core-coil assembly is accommodated in a tank and which is filled with electrically insulating oil. Cover and a heat dissipation mechanism provided on the cover, the heat dissipation mechanism being disposed inside the tank, the heat collecting portion immersed or floating in the electrically insulating oil, and the outside of the cover comprising a heat radiating portion, and a heat transfer unit for transferring the heat collected by the heat collector to the heat radiating portion, the heat dissipation mechanism, in the inside of the tank, a shall comprise a built-conservator.

  In the stationary induction device of the present invention, the heat dissipation mechanism may include a built-in consorbeta inside the tank.

  According to the present invention, it is possible to release the heat possessed by the electrical insulation oil above the content of the static induction device to the outside of the tank without suppressing the cooling water passage, and to suppress the internal pressure fluctuation of the tank portion. be able to.

  Further, by suppressing the temperature rise, downsizing and cost reduction of the static induction device can be achieved, and by suppressing the internal pressure fluctuation of the tank, the structure can be simplified and the accident can be prevented.

The block diagram of the transformer which has a heat dissipation mechanism of Example 1 of the present invention is shown. The block diagram of the thermal radiation mechanism of Example 1 of this invention is shown. The block diagram of the transformer which has a heat dissipation mechanism with a balloon shape conservator of Example 2 of this invention is shown. The block diagram of the balloon shape conserver of Example 2 of this invention is shown. The block diagram of the transformer which has a heat dissipation mechanism with a bellows shape conditioner of Example 3 of this invention is shown. The block diagram of the bellows shape conservator of Example 3 of this invention is shown.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In each of the drawings for explaining the embodiments, the same components are denoted by the same names and reference numerals, and the repetitive description thereof will be omitted.

  A transformer according to a first embodiment of the present invention will be described with reference to FIGS. 1 and 2.

  FIG. 1 is a front view of the transformer of the present embodiment. The transformer main body 11 is accommodated in the transformer tank 15 and an electrical insulating oil 18 is contained therein. The transformer body 11 is composed of an iron core-coil assembly in which the iron core 12 and the coil 13 are assembled. A cover 16 is attached to the upper part of the tank 15, and the cover 16 is provided with a heat dissipation mechanism 20 which is a feature of the present invention. The heat dissipating mechanism 20 includes a heat collecting portion 22, a heat dissipating portion 23, and a heat transfer portion 24 between the heat collecting portion and the heat dissipating portion. The heat collecting portion 22 is immersed in the electrical insulating oil 18 inside the tank 15, and the heat radiating portion 23 is disposed outside the cover 16. The electrical insulating oil 18 is heated by the heat generated from the coil 13 of the transformer main body 11 in particular. The heat of the electrical insulating oil 18 is collected by the heat collecting unit 22 of the heat radiating mechanism 20, transmitted to the heat radiating unit 23 by the heat transfer unit 24, and radiated from the heat radiating unit 23 to the outside. By this structure, the thermal energy of the electrical insulating oil 18 can be released to the outside of the tank 15. When energized, the losses generated by the transformer become thermal energy and warm the surrounding electrical insulation oil. The warmed electrical insulating oil 18 becomes less dense and moves to the top of the tank 15. Generally, an air layer exists in the upper part of the tank, but heat dissipation from the upper part of the oil layer is efficiently performed by providing a heat dissipation mechanism in the upper part of the tank.

  FIG. 2 is a view more specifically showing the configuration of the heat dissipation mechanism 20, FIG. 2 (a) is a plan view, FIG. 2 (b) is a front view, and FIG. 2 (c) is a side view. The heat collecting portion 22, the heat radiating portion 23 and the heat conducting portion 24 are made of a metal material having a high thermoelectric efficiency, such as iron, stainless steel, copper, aluminum or the like. Cooling efficiency is further improved by attaching fins to the heat collecting portion 22 and the heat radiating portion 23 to increase the surface area.

  According to this embodiment, the heat possessed by the electrical insulating oil above the main body of the transformer can be released to the outside of the tank without having a heat dissipation means such as a cooling water passage.

  A transformer according to a second embodiment of the present invention will be described with reference to FIGS. 3 and 4.

  FIG. 3 is a front view of a transformer provided with a heat dissipation mechanism 30 with a balloon-shaped conservator according to this embodiment. The configuration in which the transformer main body 11 is accommodated in the transformer tank 15 and the electrical insulating oil 18 is contained is the same as that of the first embodiment.

  The heat dissipation mechanism of the present embodiment is provided with a built-in type consaver inside the cover 16, and the built-in type cons saver is composed of a balloon-shaped consor-beta. And in the heat dissipation mechanism 30 with a balloon shape consorter of this embodiment, the balloon shape consorbeta is connected with the heat dissipation portion 23 for discharging the heat to the outside of the tank 15. The heat radiating portion 23 is connected from the inside of the transformer to the outside of the tank 15 via the cover 16. The heat radiating portion 23 may be integrally formed with the cover 16 or may be separate.

  FIG. 4 is a block diagram of the built-in type consorbeta of this embodiment. The built-in type conservator has a structure in which a balloon-shaped conservator 31 is wrapped with a net-like heat transfer material 32, and the net-like heat transfer material 32 is directly connected to the heat dissipation portion 23 of the heat dissipation mechanism 30. The balloon-shaped conservator 31 is in a state of being immersed in or floating in the electrically insulating oil 18, and has a structure capable of releasing the heat of the electrically insulating oil to the outside of the tank 15 through the reticulated heat transfer material 32 and the heat radiating portion 23. It has become. During energization, the heat generated by the transformer is dissipated according to the same principle as that of the first embodiment. Although not shown in the drawing, a heat collecting portion may be provided in the same manner as the heat dissipating mechanism of the first embodiment by connecting to the balloon-shaped conservator 31.

  In addition, when the internal pressure fluctuation of the tank 15 occurs with the temperature change of the transformer, the balloon-shaped conservator 31 can expand and contract so that the internal pressure fluctuation of the tank 15 can be alleviated.

  According to the present embodiment, since the heat dissipation mechanism with the balloon-shaped conservator is used as the heat dissipation mechanism, the heat generated by the transformer can be released to the outside of the tank, and the internal pressure fluctuation of the tank portion can be suppressed. it can.

  A transformer according to a third embodiment of the present invention will be described with reference to FIGS. 5 and 6.

  FIG. 5 is a front view of a transformer provided with a heat dissipation mechanism 40 with a bellows-shaped conservator according to this embodiment. The configuration in which the transformer main body 11 is accommodated in the transformer tank 15 and the electrical insulating oil 18 is contained is the same as that of the first embodiment.

  In the heat dissipation mechanism 40 with the bellows-shaped conservator in the present embodiment, the bellows-shaped conservator is connected to the heat radiating portion 23 for discharging the heat to the outside of the tank 15. The heat radiating portion 23 is connected from the inside of the transformer to the outside of the tank 15 via the cover 16. The heat radiating portion 23 may be integrally formed with the cover 16 or may be separate.

  FIG. 6 is a block diagram of the built-in type consaver of this embodiment. The built-in type conservator has a structure in which the bellows-shaped consorbeta 42 is positioned on the plate-like heat transfer material 41, and the bellows-shaped consorbeta 42 is made of a heat conductive metal material. Then, the bellows-shaped conservator 42 is connected to the heat radiating portion 23 of the heat radiating mechanism, and the heat generated by the transformer is radiated according to the same principle as the first embodiment. In addition, by forming the entire bellows-shaped consorter 42 with a heat transfer material, it is possible to further improve the efficiency.

  In addition, when the internal pressure fluctuation of the tank 15 occurs with the temperature change of the transformer, the internal pressure fluctuation of the tank 15 can be alleviated by the expansion and contraction of the bellows-shaped conservator 42.

  According to the present embodiment, since the heat dissipation mechanism with the bellows-shaped conservator is used as the heat dissipation mechanism, it is possible to release the heat generated by the transformer to the outside of the tank and to suppress the internal pressure fluctuation of the tank portion. it can.

  In the first to third embodiments, the embodiments of the present invention have been described by taking a transformer as an example, but the present invention can be used for a stationary induction device including a reactor.

DESCRIPTION OF SYMBOLS 10 transformer 11 transformer main body 12 iron core 13 coil 15 tank 16 cover 18 electric insulating oil 20 heat dissipation mechanism 22 heat collecting unit 23 heat dissipation unit 24 heat transfer unit 30 heat dissipation mechanism with balloon shape conservator 31 balloon shape conservator 32 mesh heat transfer Material 40 Heat dissipation mechanism 41 with bellows shape conservator Belly shape conservator 42 Plate heat transfer material

Claims (9)

A stationary induction device containing a core-coil assembly in a tank and containing electrically insulating oil,
A cover provided on the upper portion of the tank and a heat dissipation mechanism provided on the cover;
The heat dissipation mechanism is
Inside the tank, a heat collecting portion immersed or floating in the electrical insulating oil,
A heat dissipation unit disposed outside the cover;
A heat transfer section for transferring the heat collected by the heat collection section to a heat dissipation section;
Equipped with
The static induction device according to claim 1, wherein the heat dissipation mechanism comprises a built-in consorbeta inside the tank . In the stationary induction device according to claim 1 ,
A static induction device characterized in that the built-in type conservator comprises a balloon-shaped consorber wrapped in a net-like heat transfer material. In the stationary induction device according to claim 1 ,
A stationary induction device characterized in that the built-in consorbeta comprises a bellows-shaped consaver made of a thermally conductive material. In the stationary induction device according to claim 1,
The stationary induction device, wherein the heat collecting unit or the heat radiating unit includes a fin. In the stationary induction device according to claim 1,
The stationary induction device, wherein the heat collecting unit, the heat radiating unit, and the heat conducting unit are made of a thermally conductive metal material. In the stationary induction device according to claim 1,
At least a part of the heat dissipation mechanism is integrally formed with the cover. A heat dissipation mechanism comprising a heat dissipation unit disposed outside the tank via a cover disposed above the static induction device, and a heat collection unit inside the tank and immersed in the electrically insulating oil,
The heat dissipation mechanism is characterized in that the heat collecting portion is disposed in the vicinity of a consorbeta disposed inside a tank. The stationary induction device according to any one of claims 1 to 7,
  The stationary induction device is a transformer. The stationary induction device according to any one of claims 1 to 7,
  The stationary induction device is a reactor.

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