JP2020155427A - Static induction electric device - Google Patents

Abstract

To provide a static induction electric device for suppressing vibration on a bottom of a tank on which an iron core or windings are mounted, reducing a noise radiated into space, and suppressing vibrations (lateral displacement) of the iron core and windings to suppress the risk of dielectric breakdown.SOLUTION: The static induction electric device has: an iron core assembly having a base 3c; a tank in which the iron core assembly is installed; and an anti-vibration rubber 5 installed between a bottom surface 1a of the tank and the base 3c. The bottom surface 1a of the tank has a bottom surface protrusion 1a1. The base 3c has a base protrusion 3c1. The anti-vibration rubber 5 has a recess 5a fitting into the bottom surface protrusion 1a1 and the base protrusion 3c1.SELECTED DRAWING: Figure 2

Description

The present invention relates to a static induction electric device represented by a transformer.

In a general transformer, the iron core and windings vibrate due to the magnetostriction of the iron core and the electromagnetic force acting on the windings, and noise is generated due to this vibration.

As a background technique in this technical field, there is Japanese Patent Application Laid-Open No. 8-335589 (Patent Document 1). In this patent document 1, from the top, a plate-shaped vibration isolator 1, a content-side steady rest 2 attached to an iron core tightening bracket, a plate-shaped vibration isolator 3, and a tank-side steady rest attached to a tank side plate. 6. Arrange the plate-shaped vibration isolator 7 in this order, and in the holes that penetrate the content side steady rest 2, the tank side steady rest 6, the plate-shaped vibration isolator 1, the plate-shaped vibration isolator 3, and the plate-shaped vibration isolator 7. A transformer is described in which a bolt 9 is inserted via a cylindrical vibration isolator 8 and a nut 10 is tightened to fix the bolt 9.

Further, Patent Document 1 describes a transformer that reduces noise by fixing a steady rest via a vibration-proof material to prevent vibration generated in the main body of the contents from being transmitted to the side plate of the tank. Has been done.

Japanese Unexamined Patent Publication No. 8-335319

In a general transformer, the iron core and windings are mounted on the bottom of the tank. The vibration of the iron core and windings vibrates the bottom of the tank, and this vibration is transmitted to the side of the tank and the top of the tank, and the vibration of the bottom of the tank, the side of the tank and the top of the tank is radiated into the space as noise. To.

The transformer described in Patent Document 1 prevents noise generated in the content main body (iron core and winding) from being transmitted to the side plate of the tank to reduce noise.

However, Patent Document 1 does not describe that the vibration of the bottom surface of the tank is transmitted to the side surface of the tank or the upper surface of the tank and is radiated into the space as noise.

Therefore, the present invention suppresses the vibration of the bottom surface of the tank on which the iron core and windings are mounted, suppresses the vibration transmitted to the side surface of the tank and the top surface of the tank, reduces the noise radiated into the space, and suppresses the vibration of the iron core. Provided is a static induction electric device that suppresses vibration (lateral displacement) of windings and windings, and particularly suppresses the risk of dielectric breakdown in the event of an earthquake.

In order to solve the above problems, the static induction electric device of the present invention has an iron core assembly having a base, a tank in which the iron core assembly is installed, and a vibration-proof rubber installed between the bottom surface of the tank and the base. The bottom surface of the tank has a bottom protrusion, the base has a base protrusion, and the anti-vibration rubber has a bottom protrusion and a recess for fitting to the base protrusion.

According to the present invention, the vibration of the bottom surface of the tank on which the iron core and the winding are mounted is suppressed, the vibration transmitted to the side surface of the tank and the top surface of the tank is suppressed, the noise radiated into the space is reduced, and the iron core is suppressed. It is possible to provide a static induction electric device that suppresses vibration (lateral displacement) of windings and windings, and particularly suppresses the risk of dielectric breakdown during an earthquake.

Issues, configurations and effects other than those described above will be clarified by the explanation of the following examples.

It is sectional drawing of the static induction electric appliance of Example 1. FIG. It is a partially enlarged sectional view of the static induction electric appliance of Example 1. FIG. It is an enlarged view of the protrusion of Example 1. FIG. It is an enlarged view of the anti-vibration rubber of Example 1. It is a partially enlarged cross-sectional view at the time of transportation of the static induction electric appliance of Example 1. FIG. It is a partially enlarged sectional view of the static induction electric appliance of Example 2. FIG. It is a partially enlarged sectional view of the static induction electric appliance of Example 3. FIG.

Hereinafter, examples of the present invention will be described with reference to the drawings. The same or similar configurations may be designated by the same reference numerals, and if the descriptions are duplicated, the description may be omitted.

FIG. 1 is a cross-sectional view of the static induction electric device of the first embodiment. Note that FIG. 1 is a cross-sectional view of a static induction electric device at a position where a dowel 2 described later is installed.

The static induction electric device (hereinafter, described using a “transformer”) described in this embodiment includes a metal tank 1 and at least one iron core assembly 3 installed inside the tank 1. Have. The iron core assembly 3 is an assembly of a transformer main body composed of an iron core 3a, a winding 3b, other parts (not shown), and a metal base 3c installed under the iron core 3a. Is. That is, the iron core 3a is installed above the base 3c.

The base 3c of the iron core assembly 3 is installed on the bottom surface 1a of the tank 1 via the anti-vibration rubber 5 having an insulating property.

That is, the transformer described in this embodiment includes the iron core assembly 3 having the base 3c of the iron core assembly 3, the tank 1 in which the iron core assembly 3 is installed, the bottom surface 1a of the tank 1, and the iron core assembly. It has an anti-vibration rubber 5 installed between the base 3c and the base 3.

Further, on the bottom surface 1a of the tank 1, a cylindrical metal dowel 2 for positioning the iron core assembly 3 when assembling the iron core assembly 3 is installed by welding or the like. The dowels 2 are installed at at least four places.

In this embodiment, iron is used for the tank 1, the dowel 2, and the base 3c.

Further, the inside of the tank 1 is filled with the cooling medium (insulating medium) 4.

In the transformer, the iron core 3a and the winding 3b vibrate due to the magnetostriction of the iron core 3a and the electromagnetic force acting on the winding 3b. Then, this vibration vibrates the bottom surface 1a of the tank 1 via the base 3c of the iron core assembly 3, and further, this vibration is transmitted to the side surface 1b of the tank 1 and the top surface 1c of the tank 1, and the tank 1 The vibrations of the bottom surface 1a, the side surface 1b of the tank 1, and the top surface 1c of the tank 1 are radiated into the space as noise.

However, in this embodiment, since the anti-vibration rubber 5 is installed between the base 3c of the iron core assembly 3 and the bottom surface 1a of the tank 1, the vibration transmitted to the bottom surface 1a of the tank 1 can be suppressed. .. Further, the vibration transmitted to the side surface 1b of the tank 1 and the upper surface 1c of the tank 1 can be suppressed, and the noise radiated to the space can be reduced.

FIG. 2 is a partially enlarged cross-sectional view of the static induction electric device of the first embodiment. Note that FIG. 2 is an enlarged view of the broken line portion of FIG.

A bottom protrusion 1a1 is formed on the bottom surface 1a of the tank 1, and a base protrusion 3c1 is formed on the base 3c of the iron core assembly 3. Further, the anti-vibration rubber 5 is formed with a recess 5a that fits with the bottom protrusion 1a1 and the base protrusion 3c1.

That is, the bottom surface 1a of the tank 1 has a bottom surface protrusion 1a1, and the base 3c of the iron core assembly 3 has a base protrusion 3c1. Further, the anti-vibration rubber 5 has a recess 5a that fits with the bottom protrusion 1a1 and the base protrusion 3c1.

As a result, vibration (particularly, rolling) transmitted to the bottom surface 1a of the tank 1 can be greatly suppressed, and noise can be reduced.

In addition, vibration (lateral displacement) of the iron core assembly 3 can be suppressed. By suppressing the vibration (lateral displacement) of the iron core assembly 3, it is possible to suppress the contact between the dowel 2 and the base 3c of the iron core assembly 3.

As a result, a gap can be formed between the dowel 2 and the base 3c of the iron core assembly 3. That is, it is not necessary to install a spacer between the dowel 2 and the base 3c of the iron core assembly 3. Then, this gap can suppress the vibration transmitted from the base 3c of the iron core assembly 3 to the bottom surface 1a of the tank 1 via the dowel 2, and can reduce the noise.

Further, this gap maintains the insulating property between the dowel 2 and the base 3c of the iron core assembly 3.

If a spacer is installed between the dowel 2 and the base 3c of the iron core assembly 3, the spacer may be damaged due to vibration (lateral displacement) of the iron core assembly 3, and the spacer may be damaged. , There is a concern about dielectric breakdown between the dowel 2 and the base 3c of the iron core assembly 3.

However, in this embodiment, since it is not necessary to install a spacer between the dowel 2 and the base 3c of the iron core assembly 3, the concern about damage to the spacer due to vibration (lateral displacement) of the iron core assembly 3 is eliminated. .. Then, the risk of dielectric breakdown between the dowel 2 and the base 3c of the iron core assembly 3 due to the damage of the spacer can be suppressed.

Furthermore, in the future, even in transformers where the tank 1 can be made smaller, the iron core assembly 3 can be made larger, and the cooling medium (insulating medium) 4 can be reduced to reduce costs, vibration (lateral slip) of the iron core assembly 3 can be achieved. By suppressing the change in distance between the iron core assembly 3 and the side surface 1b of the tank 1, the risk of dielectric breakdown between the iron core assembly 3 and the side surface 1b of the tank 1 can be suppressed. ..

Further, by suppressing the vibration (lateral displacement) of the iron core assembly 3, it is possible to suppress the change in the distance between the iron core assembly 3 and the side surface 1b of the tank 1, and in particular, the iron core assembly 3 and the tank 1 during an earthquake. The risk of dielectric breakdown between the side surface 1b and the side surface 1b can be suppressed.

Generally, transformers operate for a long period of several decades, so they are hit by repeated earthquakes. The transformer described in this embodiment is used between the dowel 2 and the base 3c of the assembly 3 and between the iron core assembly 3 and the side surface 1b of the tank 1 even in the case of being hit by such repeated earthquakes. During the period, the risk of dielectric breakdown can be suppressed.

As described above, in this embodiment, in particular, even when a lateral force is applied to the iron core assembly 3 due to an earthquake, the iron core assembly 3 and the anti-vibration rubber 5 are laterally displaced and vibration-proof. It is possible to suppress lateral displacement between the rubber 5 and the bottom surface 1a of the tank 1. That is, a bearing capacity is generated against the lateral displacement of the iron core assembly 3, and the lateral displacement of the iron core assembly 3 at the time of an earthquake is prevented.

A plurality of bottom protrusions 1a1, base protrusions 3c1, and recesses 5a are formed, and the bottom protrusions 1a1 and the base protrusions 3c1 are staggered so as not to overlap each other. For example, the bottom protrusion 1a1 and the base protrusion 3c1 are formed in a dusty shape. The strength and the insulating property of the anti-vibration rubber 5 can be maintained by forming the bottom protrusion 1a1 and the base protrusion 3c1 so as not to overlap each other.

As described above, according to the present embodiment, the bottom protrusion 1a1 is formed on the bottom surface 1a of the tank 1, the base protrusion 3c1 is formed on the base 3c of the iron core assembly 3, and the bottom protrusion 1a1 and the base protrusion are formed on the vibration isolator 5. By forming the recess 5a that fits with 3c1, it is possible to reduce noise by suppressing vibration and suppress the risk of dielectric breakdown by suppressing lateral displacement of the iron core assembly 3.

FIG. 3 is an enlarged view of the protrusion of the first embodiment.

In this embodiment, the bottom protrusion 1a1 formed on the bottom surface 1a of the tank 1 and the base protrusion 3c1 formed on the base 3c of the iron core assembly 3 have a shape like a flat tip (upper part) of a quadrangular pyramid. ..

However, the shape is not limited to this. For example, it may have a shape such that the tip (upper part) of a triangular pyramid or a cone is flattened. Further, the shape may be a triangular prism, a square prism, or a cylinder.

It is preferable that the side surface (side) of the bottom surface protrusion 1a1 and the base protrusion 3c1 has a tapered structure. This is because it is easy to fit into the recess 5a formed in the anti-vibration rubber 5 at the time of assembly. Further, in order to maintain strength and insulation, it is preferable that the height is small with respect to the length of the base.

Further, it is preferable that the bottom protrusion 1a1 and the base protrusion 3c1 have the same shape. However, the bottom protrusion 1a1 and the base protrusion 3c1 may have different shapes.

The recess 5a has a recess shape that fits into the bottom protrusion 1a1 and the base protrusion 3c1.

FIG. 4 is an enlarged view of the anti-vibration rubber of the first embodiment.

In this embodiment, in particular, the anti-vibration rubber 5 is formed with a groove 5b connected to the recess 5a. The groove 5b is formed to discharge air remaining in the fitting portion at the time of assembly, that is, when the bottom protrusion 1a1 or the base protrusion 3c1 is fitted with the recess 5a.

If air remains in the fitting portion, the remaining air may be mixed in the cooling medium (insulating medium) 4 filled inside the tank 1. If air is mixed into the cooling medium (insulating medium) 4, there is a concern that dielectric breakdown may occur between the iron core assembly 3 and the tank 1 or in the transformer body.

Therefore, in this embodiment, the risk of such dielectric breakdown is suppressed by discharging the air remaining in the fitting portion.

FIG. 5 is a partially enlarged cross-sectional view of the static induction electric device according to the first embodiment during transportation.

Since it is expected that the dowel 2 will shake more than during an earthquake during transportation, a wooden spacer 6 will be inserted between the dowel 2 and the base 3c of the iron core assembly 3 to suppress lateral displacement of the iron core assembly 3. The spacer 6 is removed when the transportation is completed.

FIG. 6 is a partially enlarged cross-sectional view of the static induction electric device of the second embodiment.

In this embodiment, a displacement regulating member 7 that regulates the vertical displacement of the base 3c of the iron core assembly 3 is added to the transformer described in the first embodiment.

The displacement regulating member 7 includes a support member 7a installed on the bottom surface 1a of the tank 1, a slide member 7b movable with respect to the support member 7a, a bolt 7c for fixing the slide member 7b to the support member 7a, and a slide member. It has an elastic member 7d made of woody or anti-vibration rubber installed in 7b.

The support member 7a and the slide member 7b have a substantially L-shape. The elastic member 7d is installed above the base 3c of the iron core assembly 3 and is installed in non-contact with the base 3c of the iron core assembly 3.

By movably installing the slide member 7b with respect to the support member 7a, the gap between the base 3c of the iron core assembly 3 and the elastic member 7d can be adjusted as narrowly as possible.

It is preferable that the same number of displacement regulating members 7 as the dowels 2 are installed.

As a result, it is possible to prevent the base 3c of the iron core assembly 3 from jumping up and down even in the case of pitching during an earthquake. Then, the bottom protrusion 1a1 and the base protrusion 3c1 are disengaged from the recess 5a, and the concern about lateral displacement of the base 3c of the iron core assembly 3 is eliminated.

Further, in the event of an earthquake, the lateral displacement of the iron core assembly 3 can be suppressed, and the risk of dielectric breakdown can be suppressed. In addition, noise due to vibration suppression can be reduced.

FIG. 7 is a partially enlarged cross-sectional view of the static induction electric device of the third embodiment.

In this embodiment, a displacement regulating member 7 that regulates the vertical displacement of the base 3c of the iron core assembly 3 is added to the transformer described in the first embodiment.

The displacement regulating member 7 includes a support member 7a installed on the dowel 2, a bolt 7c for fixing the support member 7a to the dowel 2, and an elastic member 7d made of wood or anti-vibration rubber installed on the support member 7a. Have.

The elastic member 7d is installed above the base 3c of the iron core assembly 3 and is installed in non-contact with the base 3c of the iron core assembly 3.

In this embodiment, the number of parts can be reduced and the installation space can be reduced as compared with the second embodiment.

The height of the dowel 2 is adjusted to adjust the gap between the base 3c of the iron core assembly 3 and the elastic member 7d.

It is preferable that the same number of displacement regulating members 7 as the dowels 2 are installed.

As a result, as in the second embodiment, it is possible to suppress the vertical swing of the base 3c of the iron core assembly 3 even in the case of pitching during an earthquake. Then, the bottom protrusion 1a1 and the base protrusion 3c1 are disengaged from the recess 5a, and the concern about lateral displacement of the base 3c of the iron core assembly 3 is eliminated.

Further, in the event of an earthquake, the lateral displacement of the iron core assembly 3 can be suppressed, and the risk of dielectric breakdown can be suppressed. In addition, noise due to vibration suppression can be reduced.

The present invention is not limited to the above-described examples, and includes various modifications. For example, the above-described embodiment has been described in detail in order to explain the present invention in an easy-to-understand manner, and is not necessarily limited to those having all the described configurations. Further, it is possible to replace a part of the configuration of one embodiment with the configuration of another embodiment, and it is also possible to add the configuration of another embodiment to the configuration of one embodiment. In addition, it is possible to add, delete, or replace a part of the configuration of each embodiment with another configuration.

1 ... Tank, 1a ... Bottom surface, 2b ... Side surface, 2c ... Top surface, 1a1 ... Bottom protrusion, 2 ... Dowel, 3 ... Iron core assembly, 3a ... Iron core , 3b ... winding, 3c ... base, 3c1 ... base protrusion, 4 ... cooling medium (insulating medium), 5 ... anti-vibration rubber, 5a ... dent, 5b ... Groove, 6 ... Spacer, 7 ... Displacement regulating member, 7a ... Support member, 7b ... Slide member, 7c ... Bolt, 7d ... Elastic member

Claims (7)

It has an iron core assembly having a base, a tank in which the iron core assembly is installed, and a vibration-proof rubber installed between the bottom surface of the tank and the base.
A static induction electric device having a bottom surface of the tank having a bottom surface protrusion, the base having a base protrusion, and the anti-vibration rubber having a bottom surface protrusion and a recess fitted to the base protrusion. An iron core assembly having a metal base, a metal tank in which the iron core assembly is installed, an insulating anti-vibration rubber installed between the bottom surface of the tank and the base, and the above. It has a metal dowel, which is installed on the bottom of the tank and positions the iron core assembly.
A static induction electric device having a bottom surface of the tank having a bottom surface protrusion, the base having a base protrusion, and the anti-vibration rubber having a bottom surface protrusion and a recess fitted to the base protrusion. The static induction electric device according to claim 1 or 2, wherein the bottom protrusion and the base protrusion are formed so as not to overlap each other. The static induction electric device according to claim 1 or 2, wherein the bottom surface protrusion and the base protrusion have a tapered side surface. The static induction electric device according to claim 1 or 2, wherein the anti-vibration rubber has a groove connecting to the recess. It has a displacement regulating member that regulates the vertical displacement of the base, and the displacement regulating member includes a support member installed on the bottom surface of the tank, a slide member that can move with respect to the support member, and the slide. The static induction electric device according to claim 1 or 2, further comprising a bolt for fixing the member to the support member and an elastic member installed on the slide member. It has a displacement regulating member that regulates the vertical displacement of the base, and the displacement regulating member is installed on the support member installed on the dowel, a bolt for fixing the support member to the dowel, and the support member. The stationary induction electric device according to claim 2, further comprising an elastic member 7d.

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