WO2017038459A1

WO2017038459A1 - Vibration control structure of stationary induction device

Info

Publication number: WO2017038459A1
Application number: PCT/JP2016/073949
Authority: WO
Inventors: 聖脇本
Original assignee: 株式会社明電舎
Priority date: 2015-08-28
Filing date: 2016-08-17
Publication date: 2017-03-09
Also published as: JP2017045908A; SG11201801485YA; JP6191666B2

Abstract

The present invention uses a stationary induction device container (1) capable of accommodating the content (2) of a stationary induction device and a liquid cooling insulation medium (3). A surface (10) of the container (1) is coated with a viscoelastic adhesive, and the viscoelastic adhesive is cured to form a viscoelastic body (4), so that a vibration control structure having the viscoelastic body (4) supported on the surface (10) is formed. In addition, a restraining plate (5) is caused to make close contact with the viscoelastic adhesive which has been applied but not cured on the surface (10) of the container (1), and then, the viscoelastic adhesive is cured, so that a restraining structure having the restraining plate (5) supported on an inner surface (10a) via the viscoelastic body (4) is formed. For example, a magnetic shielding plate, an electromagnetic shielding plate, a vibration-controlling steel plate, a vibration-controlling metal plate or the like is used as the restraining plate (5).

Description

Vibration control structure of static induction equipment

The present invention relates to a vibration control structure of a static induction device such as a transformer or a reactor applied to various power facilities and the like.

As stationary induction devices such as transformers and reactors applied to electric power equipment etc., the contents (hereinafter simply referred to as contents) of stationary induction devices having an iron core and windings mounted on the iron core are insulating oil A configuration is known in which the cooling insulating medium is accommodated in a container of a static induction device (hereinafter simply referred to as a container as appropriate) together with a liquid cooling insulating medium such as, and the contents are impregnated in the cooling insulating medium in the container.

When such a stationary induction device is operated, the contents vibrate (vibration of the winding or excitation of the iron core) by the electromagnetic force generated by the current flowing through the winding and current conduction, and the vibration is transmitted to the container etc. May cause noise. Moreover, the vibration of the said container may occur also by the magnetic flux which flows into the container side by the said electricity supply. And the vibration (vibration called so-called magnetic vibration etc.) related to these stationary induction devices is noise (noise called so-called energized noise etc.) on the outer peripheral side (from the container etc. to the atmosphere side) of the stationary induction device And there is a risk of radiation.

It has been studied variously to suppress the vibration and noise related to such static induction equipment, and for example, as shown in Patent Document 1, a method using a damping material made of an elastic body such as rubber or synthetic resin is known. There is. In this patent document 1, a damping material is adhered to the inner surface (inner surface of the side wall, etc.) of the container surface by an adhesive or the like, and a magnetic shield material is adhered to the surface of the damping material by an adhesive or the like. By carrying out, the structure (it calls a restraint structure suitably hereafter) which supports a damping material in the state which restrained the damping material on the inner surface of the said container is disclosed.

Further, in Patent Document 2, a sandwich steel plate formed by laminating a plurality of damping steel plates and interposing a resin between layers is attached to an outer surface (such as an outer surface of a side wall) of the container surface through a mounting seat. A structure in which a sound absorbing material is interposed between an outer side surface and a sandwich steel plate (hereinafter referred to as a sandwich structure as appropriate) is disclosed. Further, Patent Document 2 discloses a structure in which an alloy damping steel plate for a welded structure is applied as a side wall of a container (hereinafter referred to as an alloy damping steel plate structure as appropriate) instead of using a sandwich steel plate or a sound absorbing material. There is.

Japanese Utility Model Publication 63-97220 Japanese Utility Model Application Publication No. 6-66018

As described above, various studies have been made to suppress vibration and noise, but in the case of Patent Document 1, for example, a damping material, a magnetic shield material, an adhesive agent, etc. become essential simply by forming a restraint structure, and Since it is necessary to sequentially attach the vibrating material and the magnetic shield material to the inner side surface of the container, the number of manufacturing steps (the number of parts, the number of working steps, etc.) and the manufacturing cost may be increased.

Moreover, in the sandwich structure of Patent Document 2, even if noise (for example, radiation noise) from the container can be suppressed, the effect of suppressing the vibration of the container itself is small. Moreover, in the alloy damping steel plate structure, the alloy damping steel plate is expensive compared to a general damping steel plate or the like, and there is a possibility that the product cost may be increased.

The present invention has been made in view of such technical problems, and provides a vibration suppression structure of a static induction device that can contribute to suppression of manufacturing man-hours and the like and suppression of vibration and noise related to the static induction device. It is an object.

The vibration control structure of a static induction device according to the present invention is a creation that can solve the above-mentioned problems, and one aspect thereof is the contents and contents of a static induction device having an iron core and a winding wound around the iron core. Containing a container of static induction equipment containing a liquid cooling insulating medium, and a visco-elastic body supported on the surface of the container, wherein the visco-elastic body comprises a visco-elastic adhesive coated on the surface of the container Be

The visco-elastic body may be one having a constraining plate attached via a visco-elastic adhesive coated on the surface of the container. Further, the restraint plate may be a magnetic shield plate or an electromagnetic shield plate, or a damping steel plate or a damping metal plate. Also, the restraint plate and the container surface may be joined by welding or fastening means. Further, a gap is formed on the outer peripheral side of the visco-elastic body between the inner surface of the container surface and the restraint plate attached to the visco-elastic body supported by the inner surface, and the cooling insulating medium is formed in the gap. It may be impregnated to form a squeeze film damper portion.

In another aspect, the contents of a static induction device having an iron core and a winding wound around the iron core, a container of the static induction device containing the contents together with a liquid cooling insulating medium, and a plurality of restraint plates The laminate is supported by attaching the restraint plate at one end to the surface of the container and supported integrally with the surface of the container, and between the restraint plates of the laminate is visco-elastic What adhered by the adhesive and the visco-elastic body was formed is mentioned.

The laminate may be a damping steel plate or a damping metal plate. In addition, the laminate and the container surface may be bonded by welding or fastening means.

Furthermore, an accessory for stationary induction equipment is connected to the outer peripheral side of the container through a connecting device made of steel plate, and a visco-elastic body made of a visco-elastic adhesive is supported on the steel plate surface of the connecting device Also good.

As described above, according to the present invention, it is possible to contribute to the suppression of manufacturing man-hours and the like, and the suppression of vibration and noise relating to a stationary induction device.

The general | schematic longitudinal cross-section (schematic cross section longitudinally cut along the axial center direction of the iron core 21) for demonstrating the vibration control structure of 1 A of transformers which is an example of this embodiment. The schematic enlarged view in the surrounding line X of FIG. The schematic enlarged view for demonstrating the modification in the surrounding line X of FIG. Schematic explanatory drawing which shows an example of the squeeze film damper part 42 ((A) and (B) are the figures which faced the inner side 10a of the container 1). The schematic enlarged view for demonstrating the modification in the enclosure line X of FIG. 1 (When the viscoelastic body 4 is provided in the inner surface 10a (A), when provided in the outer surface 10b (B)). The schematic enlarged view for demonstrating the modification in the surrounding line X of FIG. 1 (When the laminated body 6 is provided in the inner surface 10a (A), when provided in the outer surface 10b (B)). The schematic for demonstrating an example of the connection apparatus 73 which connects between the accessories of transformer 1A, and the container 1. FIG. The schematic for demonstrating an example of a common static induction apparatus.

The vibration control structure of the stationary induction device according to the embodiment of the present invention requires many components such as a vibration control material, a magnetic shield material, and an adhesive as in a conventional restraint structure, for example. This configuration is different from the configuration that requires an operation of sequentially attaching a material, and is configured to support a visco-elastic body made of a visco-elastic adhesive on a container surface (for example, an inner surface 10a, an outer surface 10b described later).

In the case of the stationary induction device of Patent Document 1, for example, as shown in FIG. 8, the content 2 is accommodated in the container 8 together with the cooling insulating medium 3, and the damping material 81 is supported on the inner side surface 80 of the container 8. The operation for attaching the damping material 81 to the inner surface 80 and an adhesive (that is, an adhesive for attaching the damping material 81 and the magnetic shield 83) 82 are required, and further, in the case of the restraint structure. Since the operation of attaching the magnetic shield 83 with the adhesive 82 is also required, the number of manufacturing steps (number of parts, the number of operation steps, etc.) and the manufacturing cost may be increased. Further, in the case of Patent Document 2, in a static induction device to which a simple sandwich structure is applied, the effect of suppressing the vibration of the container itself is small, and in a static induction device of an alloy damping steel plate structure to which a relatively expensive alloy damping steel plate is applied. There is a possibility that the cost of the product may increase.

On the other hand, it is found that the damping structure of the static induction device of the present embodiment can effectively use the visco-elastic adhesive (not simply bonding the members but forming a visco-elastic body and supporting it on the container surface and using it). It is a structure which can damp the vibration which concerns on a static induction apparatus by the visco-elastic body which consists of visco-elastic body adhesive agent supported by the container surface etc. That is, the work related to the static induction device is performed without performing the work of attaching the damping material as in Patent Document 1 or using the alloy damping steel plate as in Patent Document 2 or the adhesive 82 as in FIG. It can contribute to the suppression of vibration and noise, and can also contribute to the suppression of manufacturing man-hours and costs.

In addition, since the visco-elastic adhesive itself can bond various members, the visco-elastic adhesive is interposed between two members (for example, the inner side surface 10a and the restraint plate 5 described later) and is cured. When the members are adhered to each other, a restraining structure in which the visco-elastic body composed of the visco-elastic adhesive is constrained can be configured (configured without using the adhesive 82 as shown in FIG. 8). It may be easier to contribute to noise control.

The damping structure of the stationary induction device of the present embodiment can be modified by appropriately applying technical common sense in various fields, as long as the viscoelastic body is supported on the container surface or the like as described above. There are those listed below as an example.

«Example of vibration control structure of static induction device»
The schematic explanatory views of FIG. 1 and FIG. 2 explain the vibration control structure of the transformer 1A according to the present embodiment. The code | symbol 1 in FIG. 1, FIG. 2 shows the container which can accommodate the content 2 and the liquid cooling insulation medium 3. As shown in FIG. The container 1 can be formed using, for example, a metal material such as a plain steel plate, and is erected from the peripheral edge of one end face of the flat wall (for example, disk shape) bottom wall 11 and the bottom wall 11 thereof. And a cylindrical (for example, cylindrical) side wall 12. At one end of the side wall 12, an opening 12a is formed which allows the contents 2 and the cooling insulating medium 3 to be taken in and out of the container 1, and a lid 13 capable of opening and closing the opening 12a is formed in the opening 12a. It is provided.

The code | symbol 4 shows the visco-elastic body which consists of visco-elastic adhesive agent supported by the inner surface 10a among the surfaces 10 of the container 1. As shown in FIG. The visco-elastic body 4 can be formed, for example, by coating and curing a visco-elastic adhesive on the inner side surface 10a of the container 1 as shown in FIG. 1 and FIG. It becomes a configuration supported by 10a. The code | symbol 5 shows the restraint board which adheres on the surface of the visco-elastic body 4, and restrains the said visco-elastic body 4. As shown in FIG. The constraining plate 5 is made of, for example, a metal material and is formed in accordance with the shape of the inner side surface 10a, and adheres to the visco-elastic adhesive before curing coated on the above-mentioned inner side surface 10a. By curing the adhesive, the adhesive can be supported on the inner surface 10 a via the viscoelastic body 4. Thereby, the visco-elastic body 4 is restrained by the inner side surface 10 a and the restraining plate 5, and the restraining structure is formed in the container 1.

The content 2 includes an iron core 21 made of, for example, an amorphous magnetic material, and a winding 22 wound around the iron core 21, and is accommodated in the container 1 through the opening 12a, and the bottom wall 11 etc. Fixedly supported. For this fixed support, various configurations can be applied, including, for example, a configuration in which anti-vibration support is performed on the inner side surface 10 a via a non-illustrated fastening metal fitting or a vibration-proof material, but is limited thereto It is not a thing. Then, by filling the cooling insulating medium 3 in the container 1 through the opening 12 a, the contents 2 contained in the container 1 are immersed in the cooling insulating medium 3. It is possible to connect between the contents 2 and the outer peripheral side of the container 1 (for example, a control panel 71 described later) via, for example, a lead terminal (not shown) provided on the lid 13.

According to the transformer 1A as shown in FIG. 1 and FIG. 2, the condition that the contents 2 can be vibrated and transmitted to the container 1 by the electromagnetic force by the energization of the winding 22, the container 1 itself is vibrated by the magnetic flux by the energization. Even in a possible situation, when the vibrations are transmitted to the visco-elastic body 4, they are attenuated by the shear deformation of the visco-elastic body 4. That is, the visco-elastic body 4 suppresses the vibration and noise relating to the transformer 1A.

«An example of a viscoelastic body»
The visco-elastic adhesive applied to the visco-elastic body 4 is coated on the surface of the container 1 and cured to be a visco-elastic body, so long as it can exhibit damping property and noise suppressing property by vibration damping action, It is possible to apply various forms. For example, when a rubber-based or epoxy-based visco-elastic adhesive is applied and coated on the inner side surface 10a of the container 1, resistance to the cooling insulating medium in the container 1 (for example, when the cooling insulating medium is insulating oil) In the above, the application of a viscoelastic adhesive having oil resistance) may be mentioned, but it is not limited thereto.

Further, in the transformer 1A of FIGS. 1 and 2, the viscoelastic adhesive is coated on each of all the inner side surfaces 10a of the bottom wall 11, the side wall 12 and the lid 13 of the surface 10, and the viscoelastic adhesive is cured. The visco-elastic body 4 is formed, but the invention is not limited to this, and the characteristics of the target transformer 1A (for example, the rating, the shape of the transformer 1A, the types of various members, the use environment It is possible to set appropriately according to the

For example, as shown in FIG. 3, the visco-elastic adhesive may be coated on the outer surface 10 b of the surface 10 and cured to form the visco-elastic body 4 supported by the outer surface 10 b. In addition, the constraining plate 5 is adhered in advance to the visco-elastic adhesive before curing, and by curing the visco-elastic adhesive, the constraining plate 5 is attached to the inner side surface 10a via the visco-elastic body 4 as shown in FIG. It can be a supported configuration. Also in the configuration as shown in FIG. 3, the vibration and noise related to the transformer 1A are suppressed as in FIGS. 1 and 2.

Therefore, in the visco-elastic body 4 or the restraining plate 5, the plurality of visco-elastic bodies 4 or the restraining plate 5 may be dispersed by providing only on all or a part of the inner surface 10 a and / or the outer surface 10 b of the container 1. You may provide so that it may be located.

In the restraining structure, a visco-elastic adhesive is coated on the entire surface 10 c of the surface 10 facing the restraining plate 5 (hereinafter, opposing surface), and the viscoelastic body 4 is formed between the opposing surface 10 c and the restraining plate 5. When the gap is filled (for example, the gap 41 described later) does not exist (a state of so-called boundary lubrication), the coefficient of friction between the facing surface 10c and the restraint plate 5 becomes large, and the vibration damping action is easily obtained. . It is not limited to this. Therefore, the visco-elastic adhesive is coated on a part of the facing surface 10c to form the visco-elastic body 4, and for example, as shown in FIG. Alternatively, the visco-elastic body 4 may be formed to extend in a serpentine manner as shown in FIG. 4 (B). When the visco-elastic body 4 is formed as shown in FIG. 4, not only the visco-elastic body 4 is interposed between the facing surface 10 c and the restraining plate 5 but also a gap (for example, surrounded by the visco-elastic body 4). In the state (so-called fluid lubrication state) in which the cooling insulation medium 3 in the container 1 enters and is impregnated in the gap 41, the squeeze film damper portion 42 is formed. According to the squeeze film damper portion 42, the squeeze film damper effect can be obtained even if the vibration damping action by so-called boundary lubrication does not become large, which can contribute to the suppression of the vibration and noise relating to the transformer 1A.

The thickness of the visco-elastic body 4 is also not particularly limited, and can be appropriately set, for example, by adjusting the coating thickness of the visco-elastic adhesive. As a specific example, in the case of a static induction device applied to electric power equipment etc., when a visco-elastic adhesive of rubber or epoxy type is applied as described above, a visco-elastic body having a thickness of about several tens of μm to several mm Although forming 4 is mentioned, it is not limited to this.

In FIG. 1 to FIG. 4, the restraining plate 5 is attached to the surface of the viscoelastic body 4, but for example, the restraining plate 5 is used as shown in FIGS. 5 (A) and 5 (B). It may be a non-constrained structure (hereinafter referred to as a non-constrained structure) in which the viscoelastic body 4 is exposed. In the configuration as shown in FIG. 5, even if the operation and effect by the restraint structure can not be obtained, sufficient vibration damping action is exerted by the expansion and contraction of the viscoelastic body 4, and the number of parts is reduced. Will be reduced. In this case, the wall thickness of the viscoelastic body 4 may be set to be about 1 to 2 times the wall thickness of the container 1, but is not limited thereto.

«An example of restraint board etc.»
For the constraining plate 5, various forms can be applied as long as the visco-elastic body 4 can be restrained. For example, the constraining plate 5 is made of a magnetic shield plate such as a silicon steel plate or a nonmagnetic conductor such as copper or aluminum. Although applying an electromagnetic shielding board is mentioned, it is not limited to this.

Further, instead of simply applying the restraint plate 5, for example, as shown in FIGS. 6 (A) and 6 (B), a plurality of restraint plates (for example, sheet-like metal plates) 61 are overlapped to form visco-elasticity between the restraint plates 61. A laminate 6 bonded with an adhesive may be applied. In the case of such a laminated body 6, the visco-elastic body 4 made of a visco-elastic adhesive is interposed between the restraint plates 61. Then, the visco-elastic body 4 between the respective restraining plates 61 is supported on the surface 10 by attaching or integrating the restraining plate 61 on one end side of the laminate 6 on the surface 10 of the container 1 (the restraining plate on one end side The structure is supported via 61 and can contribute to suppression of vibration and noise relating to the transformer 1A.

Although a vibration damping steel plate, a vibration damping metal plate, etc. are mentioned as a specific example of the laminated body 6, It is not limited to this, The number of laminations of the restraint plate 61 is also set suitably, It is also possible to construct a stack 6 of the structure having the body 4). Moreover, in order to adhere the restraint plate 61 on one end side of the laminate 6 to the surface 10 of the container 1, it is possible to realize by various methods such as using an adhesive, for example, but a viscoelastic adhesive is applied. In this case, the visco-elastic body 4 (not shown in FIG. 6) is formed between the two.

Further, both the restraint plate 5 and the laminate 6 (restraint plate 61 etc.) are adhered not only to the surface 10 via the visco-elastic adhesive etc. as described above, but also both are welded or fastened. For example, they may be directly coupled by fastening bolts or the like (not shown). As described above, even when the two are directly coupled, vibration and noise related to the transformer 1A can be suppressed as long as the vibration damping action by the viscoelastic body 4 is not impeded, and the support structure is reinforced. It is also possible to make an electrical connection (grounding). In addition, as a specific example of the fastening means, for example, a fastening bolt used for fixing a heavy load installed between the inner side surface 10a of the container 1 and the contents 2, an insulating member (for example, a metal of a shield material (naked electrode ), Various kinds of screw mounting devices (symbol 62) as shown in FIG. 6 of Patent Document 1, etc. Although the application of the form is mentioned, it is not limited thereto.

«Example of cooling insulation medium»
As the cooling insulating medium 3, various media can be suitably applied as long as they are liquid and known in the field of static induction equipment and the like. For example, if it is liquid like insulating oil, the insulating oil enters and is impregnated in the gap 41 as shown in FIG. 4, and the squeeze film damper portion 42 is formed.

Also, in addition to the function of insulation cooling, it functions to suppress the heat radiation of the iron core 21 and hold the iron core 21 at a high temperature, and also has a viscosity not too high from the viewpoint of disaster prevention and environment. Applying the medium 3 is also mentioned. As a further specific example, a silicone fluid having a flash point in the range of 180 ° C. to 320 ° C., a dynamic viscosity in the range of 20 to 50 cSt, or a flash point of 250 ° C. or higher and a dynamic viscosity of 20 cSt is applied. And the like, but not limited thereto.

«Connection device to connect stationary induction device and attached device»
On the outer peripheral side of the transformer 1A, various accessories, for example, various accessories such as a control panel 71 and a cooling device 72 as shown in FIG. 7 are provided, and the accessories and the container 1 are various The connection is made via the connection device 73. The connection device 73 may be applied according to the type of accessory equipment, and may have various forms using steel plates, such as bushing pockets, ducts, cooling devices, sound barriers (for example, simple sound barriers, sound barriers, etc.). Has been applied. The connection device 73 is connected to the container 1 (connected to the lid 13 in FIG. 7), so that vibration associated with the operation of the transformer 1A can be transmitted. Alternatively, in addition to such solid transfer, vibration may be transmitted to the attached device by propagating from the transformer 1A as sound in air or oil.

Therefore, when the visco-elastic body 4 is formed by covering and curing a visco-elastic adhesive on the surface of a steel plate (for example, in the case of a tubular duct, the outer circumferential surface of the duct; not shown) in the connecting device 73. The viscoelastic body 4 (not shown in FIG. 7) is supported on the surface of the steel plate of the connection device 73, and the vibration transmitted to the steel plate attenuates, resulting in vibration of the transformer 1A or the like. It can contribute to the suppression of noise.

Further, the surface of the steel plate of the connecting device 73 is not simply coated with the visco-elastic adhesive to form the visco-elastic body 4, but the restraining plate 5 (not shown in FIG. 7) before the visco-elastic adhesive is cured. 1), it is also possible to adhere the constraining plate 5 to the visco-elastic body 4 as shown in FIG. 1 and FIG. Further, instead of forming the viscoelastic body 4 on the steel plate surface of the connection device 73, as shown in FIG. 6, the restraining plate 61 on one end side of the laminated body 6 is adhered or integrated. The elastic body 4 may be supported.

Although the present invention has been described in detail with reference to the specific examples described above, it is obvious to those skilled in the art that various modifications can be made within the scope of the technical idea of the present invention. It is natural that such modifications and the like belong to the scope of claims. For example, although a specific example of the stationary induction device of the present embodiment has been described using drawings etc. showing the transformer 1A, the present invention is not limited to a transformer, and may be applied to other stationary induction devices such as a reactor It is applicable, and it is possible to show the same operation effect, respectively.

Claims

Contents of a static induction device having an iron core and a winding wound around the iron core;
A container of static induction equipment which contains the contents with a liquid cooling insulation medium;
A visco-elastic body supported on the surface of the container;
The visco-elastic body comprises a visco-elastic adhesive coated on the surface of the container, the damping structure of the static induction device.
The damping structure of a static induction device according to claim 1, wherein the visco-elastic body has a restraining plate attached via a visco-elastic adhesive coated on the surface of the container.
The damping structure of a stationary induction device according to claim 2, wherein the restraint plate is a magnetic shield plate or an electromagnetic shield plate.
The damping structure of a stationary induction device according to claim 2, wherein the restraint plate is a damping steel plate or a damping metal plate.
The damping structure of the static induction device according to any of claims 2 to 4, wherein the restraint plate and the container surface are joined by welding or fastening means.
A gap is formed on the outer peripheral side of the visco-elastic body between the inner surface of the container surface and the restraint plate attached to the visco-elastic body supported on the inner surface.
The damping structure of a static induction device according to any one of claims 2 to 4, wherein the gap is impregnated with a cooling insulating medium to form a squeeze film damper portion.
Contents of a static induction device having an iron core and a winding wound around the iron core;
A container of static induction equipment, the contents of which are contained with a liquid cooling insulation medium;
And a laminated body in which a plurality of restraint plates are laminated;
In the laminate, a restraint plate at one end is attached to and supported by the container surface, or supported integrally with the container surface,
A damping structure of a static induction device in which a visco-elastic body is formed by bonding between vulcanis plates of the laminate by visco-elastic adhesive.
The damping structure of a stationary induction device according to claim 7, wherein the laminate is a damping steel plate or a damping metal plate.
The vibration control structure of a static induction device according to claim 7 or 8, wherein the laminate and the container surface are joined by welding or fastening means.
An accessory for stationary induction equipment is connected to the outer peripheral side of the container via a connection device made of steel plate,
The vibration control structure of a static induction device according to any one of claims 1 to 9, wherein a visco-elastic body composed of a visco-elastic adhesive is supported on the steel plate surface of the connecting device.