JP2014135434A - Electric apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric apparatus capable of obtaining high vibration reduction effect and noise reduction effect by suppressing vibration propagation to a closed vessel from an oscillation source containing a winding housed in the closed vessel.SOLUTION: An electric apparatus includes a closed vessel, an iron core, a winding and a fixed member. The closed vessel is filled with an insulation medium. The iron core is erected in the closed vessel. The winding is wound around the iron core. The fixed member holds the winding in the direction of a winding axis or fastens the winding in the circumferential direction.

Description

  Embodiments described herein relate generally to electrical equipment.

  In recent years, static induction appliances such as transformers and reactors (hereinafter referred to as “electrical equipment”) have a structure in which a large electric field and magnetic field energy are confined in a smaller space called a tank by increasing capacity and reducing size and weight. It tends to increase vibration and noise.

  In general, the noise of the electrical equipment is generated by the vibration of the electrical equipment body propagating to a tank covering the periphery of the electrical equipment body, and the side surface of the tank vibrates to emit sound to the surroundings.

  Since sound radiation is caused by vibrations on the side of the tank, conventionally, for example, a technique has been proposed to reduce noise without significantly changing the structure of the main body of the electric device by attaching a reinforcing material to the side of the tank. ing.

Japanese Patent Application Laid-Open No. 09-213541

  However, in the case of the conventional noise reduction structure by reinforcing the tank, there are the following problems.

  The position of the reinforcement attached to the side surface of the tank can be considered as a vibration node, but the side surface of the tank itself is a continuous body, and the vibration on the entire side surface of the tank always occurs.

  Since the magnitude of noise depends on the vibration area, if vibration occurs on the entire side surface of the tank, even if a reinforcing material is added, the noise reduction effect is small.

  The problem to be solved by the present invention is an electrical apparatus that can obtain a high vibration reduction effect and a noise reduction effect by suppressing vibration propagation from an oscillation source including a winding housed in a sealed container to the sealed container. Is to provide.

  The electrical equipment of the embodiment includes a sealed container, an iron core, a winding, and a fixing member. The sealed container is filled with an insulating medium. The iron core is erected in an airtight container. The winding is wound around the iron core. The fixing member clamps the winding in the direction of the winding axis or fastens the winding in the circumferential direction.

It is a see-through | perspective front view which shows the structure of the static induction machine of 1st Embodiment. It is a see-through | perspective side view of the static induction machine of FIG. It is a fragmentary perspective view which shows a mode that the coil | winding was clamped with the up-and-down fastening member. It is a see-through | perspective front view which shows the structure of the static induction machine of 2nd Embodiment. It is a see-through | perspective side view of the static induction machine of FIG. It is a see-through | perspective front view which shows the structure of the static induction machine of 3rd Embodiment. It is a see-through | perspective side view of the static induction machine of FIG. It is a perspective view which shows an example of the pressing structure of the coil | winding in the coil | winding upper part.

Hereinafter, embodiments will be described in detail with reference to the drawings.
(First embodiment)
FIG. 1 is a transparent front view showing the configuration of the static induction electric machine according to the first embodiment, and FIG. 2 is a transparent side view of the static induction electric machine of FIG. In FIG. 1, components other than the winding 12 and the upper and lower fastening members 30 are shown in cross section for easy understanding of the configuration.
As shown in FIGS. 1 and 2, the static induction electric machine according to the first embodiment includes a tank 20 as an airtight container fixed to a foundation, and an electric device as an oscillation source or a sound source stored in the tank 20. A main body 10.

  The tank 20 has iron plates such as an upper plate 21 (tank cover), a bottom plate 22 and a side plate 23 as wall surfaces, and is formed in a rectangular parallelepiped shape by these iron plates, and the inside is sealed.

  The side plate 23 may be reinforced by several reinforcing members such as H steel and L steel so as to withstand pressure from the inside. The tank 20 is filled (filled) with an insulating medium (insulating medium) such as insulating oil or insulating gas for cooling. Further, an iron core 11 a around which the winding 2 is wound is disposed at a substantially central position in the tank 20.

  That is, the tank 20 has an upper plate 21 (tank cover), a bottom plate 22, and a plurality of side plates 23, and houses the stationary induction electric appliance main body 10 together with the insulating oil 27 (insulating medium).

  The stationary induction main body 10 includes a plurality of leg bars 11, a winding 12 such as a coil, an upper yoke 13a, a lower yoke 13b, a pair of upper clamps 14a, a pair of lower clamps 14b, a pair of upper spacers 15a, a pair of It has a lower spacer 15b, an upper connecting plate 16a, a lower connecting plate 16b, an upper winding fastening plate 5, a lower winding fastening plate 6, a fixture, a fixing means or a vertical fastening member 30 as a fixing member.

  The leg iron 11 is composed of a laminated iron core in which a plurality of electromagnetic steel plates are laminated. The plurality of leg bars 11 are connected to each other by the upper yoke 13a and the lower yoke 13b. The winding 12 is wound around any of the plurality of leg irons 11.

  In this example, three leg irons 11 are arranged side by side. A pair of leg irons 11 on both sides are arranged on the left and right with the winding 12 as the center. Moreover, the leg 11 arrange | positioned in the center part is called the iron core 11a, and the coil | winding 12 is wound around this iron core 11a. The iron core 11 a is erected in the tank 20.

  A pair of upper clamps 14a is disposed on both side surfaces of the upper yoke 13a. A pair of lower clamps 14b are arranged on both side surfaces of the lower yoke 13b. A pair of upper spacers 15a is disposed between the winding 12 and the upper clamp 14a. A pair of lower spacers 15b is disposed between the winding 12 and the lower clamp 14b. The pair of upper clamps 14a are connected by an upper connecting plate 16a. The pair of lower clamps 14b are connected by a lower connecting plate 16b.

  The upper winding fastening plate 5 and the lower winding fastening plate 6 are disposed so as to face the top and bottom of the winding 12. The upper winding fastening plate 5 and the lower winding fastening plate 6 are plate-like members having a surface corresponding to the shape of the outer edge (outer periphery) of the winding 12, for example, a circular or semicircular plane.

  The upper winding fastening plate 5 and the lower winding fastening plate 6 sandwich the winding 12 in the direction of the winding axis (vertical direction or the axial direction of the iron core 11a). The vertical fastening member 30 is a fastening member that fixes the winding 12 via the upper winding fastening plate 5 and the lower winding fastening plate 6. The upper winding fastening plate 5 and the lower winding fastening plate 6 have substantially the same area of contact with the winding 12 above and below the winding 12.

  The vertical fastening member 30 is, for example, a U-shaped member in cross section. The upper and lower fastening members 30 fix the upper winding fastening plate 5 and the lower winding fastening plate 6 from the outer edge side of the winding 12.

  That is, the upper and lower fastening members 30, the upper winding fastening plate 5 and the lower winding fastening plate 6 clamp and fix the winding 12 in the direction of the winding axis (up and down direction or the axial direction of the iron core 11a). It is a fixing member.

  For the fixing member (at least the upper and lower fastening member 30), for example, a paper material (press board) or a fiber reinforced plastic (FRP) material is used.

  A paper material (press board) is formed by forming a layer of cotton or pulp, pressurizing and drying, and has mechanical strength, flexibility, and electrical insulation. The press board is suitable for use in the tank 20 filled with the insulating oil 27 because the vibration damping characteristics are improved by absorbing the insulating oil.

  In this example, the winding 12 is wound in a substantially circular shape around the iron core 11a, and the distance from the center to the outer edge is different. The winding 12 has a narrow radial width between the legs 11 and a wide width in a direction perpendicular to the radial width.

  A plurality of upper and lower fastening members 30 are arranged on the outer edge of the winding 12. In this case, the upper and lower fastening members 30 have different widths depending on the distance from the center of the winding 12 wound around the iron core 11a to the outer edge.

  In this example, it arrange | positions at the outer edge of the coil | winding 12 wound around the iron core 11a, and arrange | positions the thing with a narrow width | variety in the circumferential direction of the coil | winding 12 in the position where the outer edge of the coil | winding 12 is near the leg iron 11. A wide thing is arranged at a position far away.

  In general, the vibration supported by the shaft becomes more intense as it is farther from the shaft. Therefore, in the elliptical winding 12 as in this example, the upper and lower portions having different widths depending on the distance from the center of the winding 12. The vibration suppressing effect (vibration reducing effect) can be enhanced by arranging the tightening member 30.

Here, the details of the upper and lower fixed portions of the winding 12 will be described with reference to FIG.
As shown in FIG. 3, in this example, between the upper winding fastening plate 5 and the upper and lower fastening members 30 that sandwich the winding 12, and between the lower winding fastening plate 6 and the upper and lower fastening members 30, A protective member 34 as a cushioning material is disposed between them. The protection member 34 is an elastic body such as rubber for vibration isolation or vibration absorption, for example. In addition, it is not essential to arrange | position the protection member 34, and in order to acquire a vibration suppression effect, it is more preferable.

  In this way, after the winding 12 is sandwiched between the upper winding fastening plate 5 and the lower winding fastening plate 6, a plurality of upper and lower fastening members 30 are arranged symmetrically with respect to the winding axis of the winding 12. By fixing the upper winding fastening plate 5 and the lower winding fastening plate 6, the fastening force in the direction of the winding axis of the winding 12 can be made substantially uniform.

Next, the operation of the static induction device of this embodiment will be described.
In the case of the static induction appliance of this embodiment, the winding 12 vibrates up and down by the action of the Lorentz force of the current flowing through the winding 12 when energized. When the winding 12 vibrates up and down, the vibrations of the upper and lower yokes 13a and 13b and the leg irons 11 and 11a propagate from the winding 12, and the upper and lower winding fastening plates 5 and 6 and the upper and lower coupling plates 16a and 16b are connected. Via, the vibration propagates to the tank 20, and the vibrated tank 20 radiates noise.

  In this embodiment, the vertical fastening member 30 suppresses the vibration of the winding 12 that is the oscillation source of vibration by sandwiching the winding 12 up and down, so that the amount of vibration at the oscillation source can be reduced, and the tank 20 As a result, it is possible to reduce the overall vibration including propagation to the tank, and to reduce the noise radiated from the tank 20.

  As described above, according to the static induction electric machine of the first embodiment, the upper and lower winding fastening plates 5 and 6 arranged above and below the winding 12 and the upper and lower fastenings sandwiching the winding fastening plates 5 and 6 are provided. By providing the attachment member 30, it is possible to suppress vibration in the direction of the winding axis of the winding 12 that occurs during energization, and as a result, to reduce noise radiated from the tank 20 to which vibration is propagated. Can do.

(Second Embodiment)
4 is a transparent front view showing the configuration of the static induction electric machine according to the second embodiment, and FIG. 5 is a transparent side view of FIG. In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.
As shown in FIGS. 4 and 5, the static induction machine according to the second embodiment has a winding fastening member 31.

  The winding fastening member 31 is a fixing member that fastens the winding 12 in the circumferential direction, and is, for example, a flat rope or tape made of a material such as nylon.

  In the second embodiment, a plurality of winding fastening members 31 are wound around the windings 12 with a space between them, a wide one is used near the center, and a width near the upper and lower end portions is used. Narrow ones are used. That is, the width is changed depending on the position (height) in the axial direction in which the winding 12 is tightened.

  As described above, according to the second embodiment, by including the winding fastening member 31 that fastens the winding 12 in the circumferential direction, radial vibration of the winding 12 that occurs during energization can be suppressed. As a result, it is possible to reduce noise radiated from the tank 20 to which vibration is propagated.

(Third embodiment)
6 is a transparent front view showing the configuration of the static induction electric machine according to the third embodiment, and FIG. 7 is a transparent side view of FIG. In the third embodiment, the same components as those in the first embodiment and the second embodiment are denoted by the same reference numerals, and the description thereof is omitted.
As shown in FIGS. 6 and 7, the static induction machine according to the third embodiment includes the winding fastening plates 5 and 6 shown in the first embodiment, the upper and lower fastening members 30, and the plurality shown in the second embodiment. The winding fastening member 31 is provided.

  In the third embodiment, after the winding 12 is tightened in the circumferential direction by the winding tightening member 31, the upper and lower winding tightening plates 5 and 6 are arranged above and below the winding 12, and the upper and lower tightening member 30 The upper and lower winding fastening plates 5 and 6 are fixed. Thereby, even when the winding 12 vibrates in the vertical direction and the radial direction by the action of the Lorentz force of the current flowing in the winding 12 during energization, vibrations in the respective directions can be suppressed.

  As described above, according to the third embodiment, the upper and lower winding fastening plates 5 and 6 disposed above and below the winding 12 and the upper and lower fastening members 30 that sandwich the winding fastening plates 5 and 6 are provided. By providing the winding fastening member 31 that fastens the winding 12 in the circumferential direction, it is possible to suppress vibrations in the direction of the winding axis and the radial direction of the winding 12 that occur during energization. Noise radiated from the propagation destination tank 20 can be reduced.

  As described above, according to the embodiment described above, by suppressing vibration propagation from the oscillation source including the winding 12 housed in the tank 20 that is a sealed container to the tank 20, a high vibration reduction effect and a noise reduction effect. Can be obtained.

  As described above, the embodiments of the present invention have been described. However, these embodiments are presented as examples, and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention.

  In the above embodiment, the circular or oval upper winding fastening plate 5 is arranged on the upper part of the winding 12, but as shown in FIG. 8, for example, the longitudinal direction of the hook portion 30a of the upper and lower winding fastening members 30 The upper winding fastening plate 5a having a rectangular (rectangular) shape that is long in a direction perpendicular to the winding is sandwiched between the lower winding fastening plate having the same shape and disposed at the lower portion of the winding. Good. That is, the plate-like member may be circular, oval, rectangular, or the like, or may be a cross shape or the like, as long as the winding 12 can be pressed from the direction of the winding axis (vertical direction). Any shape is acceptable.

  These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

5, 5a ... Upper winding fastening plate 6 ... Lower winding fastening plate 10 ... Electrical equipment main body 11 ... Leg iron 11a ... Iron core 12 ... Winding 13a ... Upper yoke 13b ... Lower yoke 14a ... Upper clamp 14b ... Lower clamp 15a ... Upper spacer 15b ... Lower spacer 16a ... Upper connecting plate 16b ... Lower connecting plate 20 ... Tank 21 ... Upper plate 22 ... Bottom plate 23 ... Side plate 30 ... Vertical fastening member 31 ... Winding fastening member 34 ... Protection member

Claims (7)

An airtight container filled with an insulating medium;
An iron core erected in the sealed container;
A winding wound around the iron core;
A stationary induction device comprising: a fixing member that clamps the winding in the direction of the winding axis or fastens the winding in the circumferential direction. The fixing member is
A plate-like member arranged opposite to the direction of the winding axis of the winding;
The stationary induction device according to claim 1, further comprising: a tightening member that fixes the winding via the plate-like member.   The stationary induction device according to claim 2, further comprising a buffer material disposed between the plate-like member and the fastening member. When a plurality of the fixing members are arranged on the outer edge of the winding,
The fixing member is arranged at the outer edge of the winding wound around the iron core, and the first fixing member having a narrow width in the circumferential direction of the winding is arranged at a position where the outer edge of the winding is close to the leg iron, The stationary induction device according to claim 1, wherein a second fixing member having a width wider than that of the first fixing member is arranged at a position where the distance is long.   The stationary induction device according to claim 1, wherein a paper material or a fiber reinforced plastic material is used for the fixing member.   The static induction machine according to claim 2, wherein the contact area of the plate-like member with the winding is substantially the same in the upper and lower sides of the winding. The plate-like member is
The stationary induction device according to claim 2, wherein the static induction device has a cross shape, a rectangular shape, a circular shape, or an oval shape.

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