JPH088124A - Stationary induction electric device - Google Patents

Abstract

PURPOSE:To reduce the noisy sound from the contents of a tank by mounting a vibration suppressing steel sheet through an elastic member on the inside of the side plate of the tank, and mounting a magnetic shield, a coolant-resistant insulation sound-absorbing material, and a composite sound-absorber or a material for absorbing sound propagated through the coolant in this order on the steel sheet. CONSTITUTION:A vibration suppressing steel sheet 5 is mounted on a mounting seat 3 of the inside 2 of a side plate 1 of a tank through an elastic member 4 and tightened by nuts 6. On the sheet 5 a magnetic shield 7, a coolant-resistant insulation sound-absorbing material 8 which covers an absorbing material such as glass wool, and a composite sound-absorbing material 9 or a material for absorbing sound propagated through the coolant are laid in this order and fixed by bolts 11 and nuts 12. The internal sound pressure rise is reduced by inserting the sound-absorbing materials 8 and 9 at the inside 2 of the side plate 1. The vibration is reduced, using the sound-absorbing material 8 and the temp. rise of the tank is reduced by inserting the shield plate 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a static induction electric device such as a transformer or a reactor, and more particularly to a soundproof structure for reducing noise generated from the main body of the static induction electric device.

[0002]

2. Description of the Prior Art Conventional static induction electric transformers, such as transformers, are
For example, it was configured as shown in FIG. That is, in FIG. 3, a main body 23 composed of the iron core 21 and the winding wire 22 of the transformer is fixed to the base 25 of the tank 24, and the tank 2 together with the insulating cooling medium 26 such as insulating oil or insulating gas.
A magnetic shield 28 is attached to the inner surface of the side plate 27 of the tank 24. The tank 24 communicates with a cooler (not shown) via upper and lower connecting pipes (not shown), and the insulating cooling medium 26 is used as the tank 2
4, the upper connecting pipe, the cooler, the tank 24, the lower connecting pipe, and the tank 24 are circulated in this order to cool the contents main body 23 including the iron core 21 and the windings 22 of the transformer.

The tank 24 is made of a steel plate. Inside the tank 24, a main body 23 made up of an iron core 21 serving as a magnetic flux passage and a winding (coil) 22 serving as a current passage, and a magnetic flux serving as a leakage magnetic flux passage. A shield 28 and a cooling medium (insulating oil or insulating gas) 26 for enhancing the insulation strength and the cooling effect are housed.

FIG. 4 is an explanatory view showing the noise generation source of the transformer of FIG. 3, and as shown in FIG. 4, the noise of the static induction generator generated from the content main body 23 composed of the iron core 21 and the winding 22 is (1) ) Those that directly reach the tank 24 as sound waves 29 that cause the increase of the sound pressure inside (2) Propagation in the refrigerant in which the vibration of the main body 23 propagates in the cooling medium 26 that vibrates the tank 24 via the cooling medium 26 30. (3) The solid transmission 31 that directly vibrates the base 25 from the main body of the contents 23 is roughly divided into three routes to be released to the outside.

[0005]

However, in such a conventional structure, since the tank that originally reduces the noise from the main body becomes a secondary sound source, a soundproof wall must be installed outside the tank. The whole thing gets bigger and bigger.

The present invention has been made in view of the above points, and it is an object of the present invention to provide a low-noise and compact static induction generator.

[0007]

In order to achieve the above object, in the first embodiment of the static induction electric device of the present invention, a damping steel plate is attached to the inside of the side plate of the tank through an elastic body, and the damping steel plate is attached. A magnetic shield, a refrigerant-resistant insulating sound absorbing material, a composite sound absorbing material, or a sound absorbing material in a refrigerant is stacked in this order from the tank side, and the noise is reduced from the content body.

Further, in the second embodiment of the static induction electric device of the present invention, inside the side plate of the tank, a refrigerant-resistant insulating sound absorbing material, a magnetic shield, a composite sound absorbing material, or a sound propagation absorbing material in the refrigerant is installed from the tank side. By stacking them in order, and by mounting them on a mounting seat via an elastic body, noise from the main body of the static induction machine is reduced.

[0009]

The static induction electric device of the present invention can reduce the increase in the internal sound pressure of the static induction electric device by attaching the composite sound absorbing material, and can propagate the sound in the refrigerant in the refrigerant by attaching the sound absorbing material. It is possible to reduce the vibration due to, and to further reduce the internal sound pressure rise by the refrigerant resistant insulating sound absorbing material that covers the sound absorbing material, and also has the insulating effect, and it is possible to reduce the dimension between the coil and the tank. .

By supporting the composite sound absorbing material or the sound propagating sound in the refrigerant with the vibration damping steel plate, it is possible to reduce the propagating vibration as an internal energy loss together with the sound propagating sound in the refrigerant by the vibration transmission by the propagating in the refrigerant. It is possible to significantly suppress the tank wall from becoming a secondary sound source. The sound-transmitting material in a refrigerant is a sound-absorbing material such as glass wool, which is wrapped with a cross sheet film such as crepe insulating paper or a press board in many layers.

By fixing to the side plate of the tank through the elastic body, the vibration transmitted from the main body of the body to the base and from the base to the side plate of the tank is reduced, and the sound transmission material in the refrigerant effectively functions.

By combining these, noise can be reduced and a compact static induction machine can be obtained without installing a soundproof wall outside the tank. Furthermore, even when noise needs to be reduced and a soundproof wall is installed outside, the structure of the soundproof wall can be simplified.

Since the sound insulation mass is increased by attaching the magnetic shield to the composite sound absorbing material or the sound absorbing material propagating in the refrigerant, the effect of reducing vibration noise is improved, and the temperature increase of the tank is reduced by the magnetic shield.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the static inductor according to the present invention will be described below with reference to the drawings.

FIG. 1 is a cross-sectional view of an essential part showing the inside of a side plate of a tank according to a first embodiment of the present invention. In FIG. 1, an elastic body 4 is interposed between a mounting seat 3 on an inner side 2 of a side plate 1 of the tank. The vibration damping steel plate 5 by tightening it with the nut 6
A magnetic shield 7, a refrigerant-resistant insulating sound absorbing material 8 covering a sound absorbing material such as glass wool, a composite sound absorbing material 9
Alternatively, the propagating sound absorbing material 10 in the refrigerant is stacked in this order, and the bolt 1
Attach with 1 and nut 12.

By inserting the refrigerant resistant insulating sound absorbing material 8 and the composite sound absorbing material 9 into the inner side 2 of the side plate 1 of the tank, the increase in the sound pressure inside is reduced. Further, vibration is reduced by using the propagating sound absorbing material 10 in the refrigerant. In addition, the temperature rise of the tank is reduced by inserting the magnetic shield plate 7. Further, the vibration damping steel plate 5 and the elastic body 4 are used to fix the composite sound absorbing material 9 and the sound propagating in the refrigerant 10 to the inner side 2 of the side plate 1 of the tank, thereby providing a support structure for damping the transmission of the fixed vibration. It is a thing.

The above-mentioned vibration-damping steel plate 5 is formed, for example, by bonding two iron plates with resin, and suppresses transmission of fixed vibration.

The refrigerant-resistant insulating sound-absorbing material is formed by winding sound-absorbing material such as glass wool in many layers around a cloth sheet film such as crepe insulating paper or press board. By winding multiple layers, the dust of the sound absorbing material is prevented from coming out in the refrigerant, and because it is covered with an insulator, it has an insulating effect on itself and also has the function of preventing discharge from the coil to the tank.

As the sound propagating sound in the refrigerant, it is possible to reduce the vibration due to the propagation in the refrigerant. For example, a vibration damping steel plate is preferable. To hold the sound propagating sound in the refrigerant, a damping steel plate is attached to the mounting portion. Although used, if the vibration-damping steel plate alone has the effect of reducing vibration, the sound-transmitting sound absorber in the refrigerant may be a normal steel plate.

The composite sound absorbing material 9 is the refrigerant propagation sound absorbing material 1 described above.
0 and the sound absorbing material are bonded together via a viscoelastic body or the like.

FIG. 2 is a cross-sectional view of an essential part showing the inside of the side plate of the tank of the second embodiment of the present invention. In FIG. 2, the above-mentioned refrigerant resistance is provided between the magnetic shield 7 and the side plate 1 of the tank. An elastic body 4 is provided on the inner side 2 of the side plate 1 of the tank with the insulating sound absorbing material 8 interposed therebetween.
The magnetic shield 7 and the composite sound absorbing material 9 or the sound absorbing material 10 propagating in the refrigerant are attached to the mounting seat 3 via the nut 6 via the.

By inserting the refrigerant resistant insulating sound absorbing material 8 and the composite sound absorbing material 9 into the inner side 2 of the side plate 1 of the tank, the increase in the sound pressure inside is reduced. In addition, the sound absorbing material 1 propagated in the refrigerant
Vibration is reduced by using 0. further,
The side plate 1 of the tank is fixed to the side plate 1 of the tank with the composite sound absorbing material 9 and the sound absorbing material 10 propagating in the refrigerant via the elastic body 4.
By attaching to the side plate 1 of the tank, a supporting structure for attenuating the transmission of the fixed vibration is attached to the side plate 1 of the tank. improves.

[0023]

As described above, in the static induction electric device of the present invention, by installing the refrigerant resistant insulation sound absorbing material 8 and the composite sound absorbing material in which the sound absorbing material such as glass wool is covered with the insulating sheet or the like, It is possible to reduce the increase in sound pressure inside the static induction electric device. Further, since this refrigerant resistant insulating sound absorbing material has an insulating effect itself, the insulating distance between the coil and the tank can be shortened and the entire size can be reduced.

By attaching the sound absorbing material propagating in the refrigerant, it is possible to reduce the vibration of the stationary induction electric device due to the propagation in the refrigerant.

By supporting the composite sound absorbing material or the sound propagating in the refrigerant with the vibration damping steel plate or the elastic body, the vibration transmission due to the propagating in the refrigerant is transmitted to the sound propagating in the refrigerant and the propagating vibration as internal energy loss. It can be reduced, and it can be suppressed significantly that the tank wall becomes a secondary sound source.

By supporting the elastic body through the elastic body, it is possible to reduce the vibration transmitted from the main body of the content to the side plate of the tank from the base, and to effectively function the sound transmission material in the refrigerant.

In any of the above cases, it is possible to achieve a compact static induction machine with a reduced noise without installing a soundproof wall outside the tank. Furthermore, even when noise needs to be reduced and a soundproof wall is installed outside, the structure of the soundproof wall can be simplified.

By attaching the magnetic shield to the composite sound absorbing material or the sound absorbing material in the refrigerant, the sound insulation mass is increased,
The effect of reducing vibration noise is improved.

By attaching the magnetic shield to the tank, the temperature rise of the tank can be reduced.

Excellent effects such as the above can be obtained.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part showing the inside of a tank side plate according to a first embodiment of the present invention.

FIG. 2 is a sectional view of an essential part showing the inside of a tank side plate according to a second embodiment of the present invention.

FIG. 3 is a sectional view showing the structure of a conventional transformer.

FIG. 4 is a cross-sectional view showing vibration / noise paths in a conventional transformer structure.

[Explanation of symbols]

 1 ... Side plate of tank 2 ... Inside of tank 3 ... Mounting seat 4 ... Elastic body 5 ... Damping steel plate 6, 12 ... Nut 7 ... Magnetic shield 8 ... Refrigerant resistant insulating sound absorbing material 9 ... Composite sound absorbing material 10 ... Propagation in refrigerant Sound absorbing material 11 ... Bolt

Claims (2)

[Claims] 1. In a static induction electric device in which a main body of a core and a winding is housed inside a tank together with an insulating cooling medium, a damping steel plate is attached to the inside of a side plate of the tank via an elastic body. A static induction device characterized in that a magnetic shield, a refrigerant resistant insulating sound absorbing material, a composite sound absorbing material or a sound propagating sound absorbing material in a refrigerant is stacked in this order from a side plate side of a tank on a shaking plate. 2. A static induction electric device in which a content body consisting of an iron core and a winding is housed inside a tank together with an insulating cooling medium, wherein a refrigerant-resistant insulating sound-absorbing material is provided inside the tank side plate from the tank side plate side. A static induction machine characterized in that a magnetic shield, a composite sound absorbing material or a sound absorbing material propagating in a refrigerant are stacked in this order and attached to a mounting seat via an elastic body.