JP6191666B2 - Vibration control structure of static induction equipment - Google Patents

Description

  The present invention relates to a vibration damping structure for a stationary induction device such as a transformer or a reactor that is applied to various power facilities.

  As static induction devices such as transformers and reactors applied to electric power facilities, etc., the contents of static induction devices having an iron core and windings attached to the iron core (hereinafter simply referred to as “contents” as appropriate) A structure in which a cooling induction medium is housed in a container of a stationary induction device (hereinafter simply referred to as a container as appropriate) and the contents are impregnated in the cooling insulation medium is known.

  When such a static induction device is operated, the electromagnetic force generated when a current flows through the windings causes the contents to vibrate (winding vibrations or iron core excitation vibrations), and the vibrations are transmitted to containers, etc. Can cause noise. Moreover, the vibration of the container can also occur due to the magnetic flux flowing into the container side by the energization. And vibration (such as vibration called so-called magnetic vibration) related to these stationary induction devices is caused by noise (such as noise called so-called energization noise) on the outer peripheral side (from the container etc. to the atmosphere) of the stationary induction device. There is also a risk of radiation.

  Various studies have been made to suppress such vibration and noise related to the stationary induction device. For example, as shown in Patent Document 1, a technique using a damping material made of an elastic body such as rubber or synthetic resin is known. Yes. In Patent Document 1, a damping material is attached to the inner side surface (the inner side surface of the side wall, etc.) of the container surface with an adhesive or the like, and a magnetic shield material is further attached to the surface of the damping material with an adhesive or the like. Thus, a structure that supports the damping material on the inner surface of the container in a restrained state (hereinafter referred to as a restraining structure as appropriate) is disclosed.

  Further, in Patent Document 2, a sandwich steel plate in which a plurality of damping steel plates are laminated and a resin is interposed between layers is attached to an outer surface (such as an outer surface of a side wall) of a container surface via 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. Moreover, in the said patent document 2, the structure (henceforth an alloy damping steel plate structure is suitably called) which applied the alloy damping steel plate for welding structures as a side wall of a container instead of using a sandwich steel plate and a sound-absorbing material is disclosed. Yes.

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

  As described above, various studies have been made to suppress vibration and noise. For example, in the case of Patent Document 1, a damping material, a magnetic shield material, an adhesive, and the like are indispensable only by configuring a restraint structure. Since an operation of sequentially attaching the vibration material and the magnetic shield material to the inner side surface of the container is required, there is a risk of increasing manufacturing man-hours (number of parts, man-hours, etc.) and manufacturing costs.

  Further, in the sandwich structure of Patent Document 2, even if noise (for example, radiated sound) from a container can be suppressed, the effect of suppressing vibration of the container itself is small. Moreover, in the alloy damping steel plate structure, the alloy damping steel plate is more expensive than a general damping steel plate or the like, which may increase the product cost.

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

  The vibration suppression structure of the static induction device according to the present invention is a creation that can solve the above-described problems, and one aspect thereof includes the contents of the static induction device having the iron core and the winding wound around the iron core, and the contents thereof. A stationary induction device container containing a liquid cooling insulation medium, and a viscoelastic body supported on the surface of the container, the viscoelastic body comprising a viscoelastic adhesive coated on the surface of the container. And

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

  In another aspect, a stationary induction device having an iron core and a winding wound around the iron core, a stationary induction device container containing the content together with a liquid cooling insulating medium, and a plurality of restraining plates A laminated body, and the laminated body is supported by a constraining plate attached to one end side of the container, or supported integrally with the container surface, and between the constraining plates of the laminated body is viscoelastic A viscoelastic body is formed by bonding with an adhesive.

  The laminate may be a damping steel plate or a damping metal plate. Further, 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 via a connecting device made of a steel plate, and a viscoelastic body made of a viscoelastic 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 suppression of manufacturing man-hours and the like, and suppression of vibration and noise related to stationary induction equipment.

The schematic longitudinal cross-section for demonstrating the damping structure of 1 A of transformers which is an example of this embodiment (schematic sectional drawing longitudinally cut along the axial direction of the iron core 21). FIG. 2 is a schematic enlarged view taken along a surrounding line X in FIG. 1. The schematic enlarged view for demonstrating the modification in the surrounding line X of FIG. The schematic explanatory drawing which shows an example of the squeeze film damper part 42 ((A) (B) is the figure which faced the inner surface 10a of the container 1). FIG. 1 is a schematic enlarged view for explaining a modification of the encircling line X in FIG. 1 (when the viscoelastic body 4 is provided on the inner side surface 10a (A) and when provided on the outer side surface 10b (B)). 1 is a schematic enlarged view for explaining a modified example of the encircling line X in FIG. 1 (when the laminated body 6 is provided on the inner side surface 10a (A) and when provided on the outer side surface 10b (B)). Schematic for demonstrating an example of the connection apparatus 73 which connects between the auxiliary equipment of the transformer 1A, and the container 1. FIG. Schematic for demonstrating an example of a common static induction apparatus.

  The vibration damping structure of the static induction device according to the embodiment of the present invention requires many components such as a vibration damping material, a magnetic shield material, and an adhesive as in a conventional constraining structure, or a vibration damping material and a magnetic shield. This is different from the configuration that requires the work of sequentially sticking materials, etc., and is a configuration in which a viscoelastic body made of a viscoelastic adhesive is supported on the container surface (for example, inner side surface 10a and outer side 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. In the case of the restraint structure, an operation for attaching the damping material 81 to the inner side surface 80 and an adhesive (that is, an adhesive for attaching the damping material 81 and the magnetic shield 83) 82 are required. Since the operation of attaching the magnetic shield 83 with the adhesive 82 is also required, there is a risk that the manufacturing man-hours (number of parts, man-hours, etc.) and the manufacturing cost may be increased. Further, in the case of Patent Document 2, a static induction device using a simple sandwich structure has a small effect of suppressing the vibration of the container itself, and a stationary induction device having an alloy damping steel plate structure using a relatively expensive alloy damping steel plate. Product cost may increase.

  On the other hand, the vibration damping structure of the stationary induction device according to the present embodiment has been found to be able to effectively use a viscoelastic adhesive (not just bonding between members but forming a viscoelastic body and supporting it on the container surface). Therefore, the vibration related to the stationary induction device can be attenuated by a viscoelastic body made of a viscoelastic adhesive supported on the surface of the container. That is, even if the work of attaching a damping material or the like as in Patent Document 1 is performed, or the alloy damping steel plate as in Patent Document 2 or the adhesive 82 as shown in FIG. It can contribute to suppression of vibration and noise, and can also contribute to suppression of manufacturing man-hours and manufacturing costs.

  In addition, since the viscoelastic adhesive itself can bond various members, the viscoelastic adhesive is cured by interposing the viscoelastic adhesive between two members (for example, an inner side surface 10a and a restraining plate 5 described later). When the members are bonded to each other, a constraining structure in which the viscoelastic body made of the viscoelastic adhesive is constrained can be configured (configured without using the adhesive 82 as shown in FIG. 8). It may become easy to contribute to noise suppression.

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

≪Example of damping structure of stationary induction device≫
The schematic explanatory diagrams of FIGS. 1 and 2 illustrate the vibration damping structure of the transformer 1A according to the present embodiment. Reference numeral 1 in FIGS. 1 and 2 denotes a container that can contain the contents 2 and the liquid cooling insulating medium 3. The container 1 can be formed using a metal material such as a normal steel plate, for example, and is erected from a flat wall (for example, a disk shape) bottom wall 11 and a peripheral edge of one end surface of the bottom wall 11. And a cylindrical (for example, cylindrical) side wall 12. An opening 12a that allows the contents 2 and the cooling insulating medium 3 to be taken in and out of the container 1 is formed at one end of the side wall 12, and a lid 13 that can open and close the opening 12a is formed in the opening 12a. Is provided.

  Reference numeral 4 denotes a viscoelastic body made of a viscoelastic adhesive and supported by the inner side surface 10 a of the surface 10 of the container 1. The viscoelastic body 4 can be formed by coating and curing a viscoelastic adhesive on the inner side surface 10a of the container 1 as shown in FIGS. 1 and 2, for example. It becomes the structure supported by 10a. Reference numeral 5 denotes a restraining plate that is attached to the surface of the viscoelastic body 4 and restrains the viscoelastic body 4. The constraining plate 5 is formed, for example, using a metal material in accordance with the shape of the inner side surface 10a, and is in close contact with the viscoelastic adhesive before curing covered on the inner side surface 10a. It can be set as the structure supported by the inner surface 10a via the viscoelastic body 4 by hardening an adhesive agent. As a result, the viscoelastic body 4 is restrained by the inner side surface 10 a and the restraint plate 5, and a restraint structure is formed in the container 1.

  The contents 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 or the like. Fixedly supported. Various types of configurations can be applied to the fixed support. For example, a configuration in which the anti-vibration support is provided on the inner side surface 10a via a fastener, an anti-vibration material, or the like, which is not illustrated, is limited to this. It is not a thing. Then, the container 2 is filled with the cooling insulating medium 3 through the opening 12a, so that the contents 2 accommodated 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 contents 2 can vibrate and transmit to the container 1 due to the electromagnetic force due to the energization of the winding 22, and the container 1 itself vibrates due to the magnetic flux due to the energization. Even in such a situation, when the vibration is transmitted to the viscoelastic body 4, the vibration is attenuated by shear deformation of the viscoelastic body 4. That is, the vibration and noise related to the transformer 1 </ b> A are suppressed by the viscoelastic body 4.

≪Example of viscoelastic body≫
In the viscoelastic adhesive to be applied to the viscoelastic body 4, if it is coated on the surface of the container 1 and cured to become a viscoelastic body, and can exhibit damping properties, sound damping properties, etc. due to vibration damping action, Various forms can be applied. For example, when a rubber-based or epoxy-based viscoelastic adhesive is applied and the inner surface 10a of the container 1 is coated, it is resistant to the cooling insulating medium in the container 1 (for example, when the cooling insulating medium is insulating oil) Is applicable to a viscoelastic adhesive having oil resistance), but is not limited thereto.

  1A and 1B, a viscoelastic adhesive is coated on each of the inner 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. However, the present invention is not limited to this, and the characteristics of the target transformer 1A (for example, the rating, shape, type of various members, environment of use of the transformer 1A) are not limited thereto. Etc.) can be set as appropriate.

  For example, as shown in FIG. 3, the viscoelastic body 4 supported by the outer surface 10b may be formed by coating the outer surface 10b of the surface 10 with a viscoelastic adhesive and curing it. In addition, the restraint plate 5 is brought into close contact with the viscoelastic adhesive before curing, and the viscoelastic adhesive is cured, whereby the restraint plate 5 is attached to the inner side surface 10a via the viscoelastic body 4 as shown in FIG. It can be set as the structure supported. 3 also suppresses vibration and noise related to the transformer 1A as in FIGS.

  Therefore, the viscoelastic body 4 and the restraint plate 5 are provided on all or only a part of the inner side surface 10a and / or the outer side surface 10b of the container 1, or a plurality of viscoelastic bodies 4 and restraint plates 5 are dispersed. You may provide so that it may be located.

In the constraining structure, a viscoelastic adhesive is coated on the entire surface of the surface 10 facing the constraining plate 5 (hereinafter referred to as an opposing surface) 10c, and the space between the opposing surface 10c and the constraining plate 5 is covered with the viscoelastic body 4. When the gap is filled and no gap (for example, a gap 41 described later) is present (so-called boundary lubrication state), the coefficient of friction between the facing surface 10c and the constraining plate 5 becomes large, and a vibration damping action is easily obtained. , the present invention is not limited to this. Accordingly, the viscoelastic body 4 is formed by covering a part of the facing surface 10c with the viscoelastic adhesive, for example, intermittently extending as shown in FIG. 4A (in FIG. The viscoelastic body 4 that extends in a meandering manner as shown in FIG. 4B may be formed. When the viscoelastic body 4 is formed as shown in FIG. 4, not only the viscoelastic body 4 is interposed between the facing surface 10c and the restraining plate 5, but also a gap (for example, surrounded by the viscoelastic body 4). 41), the squeeze film damper portion 42 is formed when the cooling insulating medium 3 in the container 1 enters the gap 41 and is impregnated (so-called fluid lubrication state). According to the squeeze film damper portion 42, a squeeze film damper effect can be obtained even if the vibration damping action due to so-called boundary lubrication does not increase, thereby contributing to suppression of vibration and noise related to the transformer 1A.

  The thickness of the viscoelastic body 4 is not particularly limited, and can be set as appropriate by adjusting the coating thickness of the viscoelastic adhesive, for example. As a specific example, when applying a rubber-based or epoxy-based viscoelastic adhesive as described above in a static induction device applied to electric power equipment or the like, a viscoelastic body having a thickness of about several tens of μm to several mm 4 is formed, but is not limited thereto.

  1 to 4, the restraint plate 5 is attached to the surface of the viscoelastic body 4. For example, as shown in FIGS. 5A and 5B, the restraint plate 5 is used. A non-restraining structure in which the viscoelastic body 4 is exposed (hereinafter referred to as a non-restraining structure) may be used. In the configuration as shown in FIG. 5, even if the effect of the restraint structure cannot be obtained, a sufficient vibration damping action due to the expansion and contraction of the viscoelastic body 4 is achieved, and the number of parts is reduced, so that the number of manufacturing steps, etc. Will be suppressed. In this case, the thickness of the viscoelastic body 4 may be set to be about 1 to 2 times the thickness of the container 1, but is not limited thereto.

≪Example of restraint plate etc.≫
In the restraint plate 5, various forms can be applied as long as the viscoelastic body 4 can be restrained. For example, the restraint 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, as shown in FIGS. 6A and 6B, for example, a plurality of restraint plates (for example, sheet-like metal plates) 61 are stacked and viscoelasticity is formed between the restraint plates 61. You may apply the laminated body 6 adhere | attached with the adhesive agent. With such a laminate 6, the viscoelastic body 4 made of a viscoelastic adhesive is interposed between the restraining plates 61. Then, by attaching or integrating the restraint plate 61 on one end side of the laminate 6 to the surface 10 of the container 1, the viscoelastic body 4 between the restraint plates 61 is supported on the surface 10 (constraint plate on one end side). 61, and can contribute to the suppression of vibration and noise related to the transformer 1A.

  Specific examples of the laminated body 6 include a damping steel plate, a damping metal plate, and the like. However, the laminated body 6 is not limited to this. The laminated body 6 having a structure including the body 4 may be configured. In addition, the constraining plate 61 on one end side of the laminate 6 can be attached to the surface 10 of the container 1 by various methods such as using an adhesive, but a viscoelastic adhesive is applied. In this case, the viscoelastic body 4 (not shown in FIG. 6) is formed between the two.

  Further, both the restraint plate 5 and the laminated body 6 (the restraint plate 61 and the like) are not only bonded to the surface 10 via the viscoelastic adhesive as described above, but are further welded or fastened ( For example, they may be directly coupled by fastening bolts or the like (not shown). Even when both are directly coupled in this way, if the vibration damping action by the viscoelastic body 4 is not hindered, vibration and noise related to the transformer 1A can be suppressed and the support structure is reinforced. Or electrical connection (grounding) can be performed. Further, specific examples of the fastening means include, for example, fastening bolts used for fixing heavy objects placed between the inner surface 10a of the container 1 and the contents 2, and insulating members (for example, metal of a shielding material (bare electrode) Various fastening bolts used for fixing the press board, etc.), grounding bolts used for electrical grounding, and screw mounting devices (reference numeral 62) as shown in FIG. Although the thing of a form is mentioned, it is not limited to this.

≪Example of cooling insulation medium≫
As long as the cooling insulating medium 3 is liquid and is known in the field of stationary induction equipment, various media can be appropriately applied. For example, if it is liquid like insulating oil, it will be in the state which the said insulating oil entered and impregnated into the gap | interval 41 as shown in FIG. 4, and the squeeze film damper part 42 will be formed.

  Further, in addition to the function of insulation cooling, the heat insulation function of suppressing the heat dissipation of the iron core 21 and holding the iron core 21 at a high temperature is achieved, and the cooling insulation is not too high in terms of disaster prevention and environmental properties. Application of the medium 3 may also be mentioned. As a further specific example, a silicone liquid having a flash point in the range of 180 ° C. to 320 ° C. and a kinematic viscosity coefficient in the range of 20 to 50 cSt, or a flash point of 250 ° C. or more and a kinematic viscosity coefficient of 20 cSt is applied. However, it is not limited to these.

≪Connection device that connects stationary induction equipment and accessory equipment≫
On the outer peripheral side of the transformer 1A, various accessory devices, for example, various accessory devices such as a control panel 71 and a cooling device 72 as shown in FIG. 7, are provided. Connection is made via a connection device 73. The connecting device 73 is applied in accordance with the type of accessory equipment, and has various forms using steel plates such as bushing pockets, ducts, cooling devices, soundproof walls (for example, simple soundproof walls and soundproof panels). Has been applied. Since this connection device 73 is connected to the container 1 (connected to the lid 13 in FIG. 7), vibration associated with the operation of the transformer 1A can be transmitted. Alternatively, in addition to such solid transmission, vibration may be transmitted to the accessory device by propagating in the air or oil as sound from the transformer 1A.

  Therefore, when the viscoelastic body 4 is formed by coating and curing a viscoelastic adhesive on the steel plate surface (for example, in the case of a cylindrical duct, the outer peripheral surface of the duct; not shown) constituting the connection device 73, The viscoelastic body 4 (not shown in FIG. 7) is supported on the surface of the steel plate of the connecting device 73, and the vibration transmitted to the steel plate is attenuated, resulting in the vibration related to the transformer 1A and This can contribute to noise suppression.

  In addition, the viscoelastic adhesive 4 is not simply formed on the steel plate surface of the connection device 73 to form the viscoelastic body 4, but before the viscoelastic adhesive is cured, the restraint plate 5 (not shown in FIG. 7). ) In close contact, it is possible to attach a restraining plate 5 to the viscoelastic body 4 as shown in FIGS. Further, instead of forming the viscoelastic body 4 on the surface of the steel plate of the connecting device 73, a restraint plate 61 on one end side of the laminate 6 is bonded or integrated as shown in FIG. It is good also as a structure which supports the elastic body 4. FIG.

  Although the present invention has been described in detail only for 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 changes and the like belong to the scope of the claims. For example, a specific example of the static induction device according to the present embodiment has been described with reference to the drawings and the like showing the transformer 1A. However, the present invention is not limited to the transformer, and may be applied to other static induction devices such as a reactor. It is possible to apply the same effects.

DESCRIPTION OF SYMBOLS 1 ... Container 1A ... Transformer 10 (10a, 10b) ... Surface 2 ... Contents 3 ... Cooling insulation medium 4 ... Viscoelastic body 41 ... Gap 42 ... Squeeze film damper part 5, 61 ... Restraint plate 6 ... Laminate 71, 72 ... Attachment equipment 73 ... Connecting device

Claims (8)

The contents of a stationary induction device having an iron core and a winding wound around the iron core;
A container for stationary induction equipment that houses the contents together with a liquid cooling insulation medium;
Viscoelastic body supported on at least the inner surface of the container surface,
The viscoelastic body consists of a viscoelastic adhesive coated on the container surface,
At least the viscoelastic body supported on the inner surface is covered with a restraint plate via a viscoelastic adhesive coated on the container surface , and the viscoelastic adhesive coated on the container surface is In the surface facing the constraining plate in the above, it extends intermittently or meandering to cover a part of the facing surface,
A gap is formed on the outer peripheral side of the viscoelastic body between the restraint plate attached to at least the viscoelastic body supported on the inner surface and the container surface on the side on which the restraint plate is attached,
A damping structure for a stationary induction device, wherein a cooling insulating medium is impregnated in a gap on an outer peripheral side of a viscoelastic body supported on an inner surface to form a squeeze film damper portion.   2. The vibration suppression structure for a stationary induction device according to claim 1, wherein the restraint plate is a magnetic shield plate or an electromagnetic shield plate.   The damping structure for a stationary induction device according to claim 1, wherein the restraining plate is a damping steel plate or a damping metal plate.   The vibration damping structure for a stationary induction device according to any one of claims 1 to 3, wherein the restraint plate and the container surface are joined together by welding or fastening means. The contents of a stationary induction device having an iron core and a winding wound around the iron core;
A stationary induction device container containing the contents together with a liquid cooling insulation medium;
A laminated body in which a plurality of constraining plates are laminated and supported on at least the inner surface of the container surface,
The laminated body is supported by attaching a restraint plate on one end side to the surface of the container, or integrated with the surface of the container,
Between each constraining plate of the laminate, a viscoelastic body is formed by bonding with a viscoelastic adhesive,
Laminate which is supported on the inner surface via a viscoelastic adhesive coated on the inner surface, the constraining plate of the one end side is supported by adhering, and coating of a viscoelastic adhesive to the inner surface The inner surface is covered with a part of the facing surface extending intermittently or meanderingly at the facing surface facing the restraint plate on one end side,
A viscoelastic body is formed between the constraining plate on one end of the laminate supported by the inner side surface and the inner side surface by a viscoelastic adhesive coated on the inner side surface, and the viscoelastic body A gap is formed on the outer peripheral side of the
A vibration-damping structure for a stationary induction device, characterized in that a cooling insulating medium is impregnated in a gap to form a squeeze film damper portion.   6. The damping structure for a stationary induction device according to claim 5, wherein the laminate is a damping steel plate or a damping metal plate.   The structure for damping a static induction device according to claim 5 or 6, wherein the laminate and the surface of the container are joined together by welding or fastening means. An accessory for stationary induction equipment is connected to the outer peripheral side of the container via a connecting device made of steel plate,
The damping structure for a stationary induction device according to any one of claims 1 to 7, wherein a viscoelastic body made of a viscoelastic adhesive is supported on a steel plate surface of the connection device.

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