JP2022012662A - Oil-filled transformer - Google Patents

Abstract

To provide an oil-filled transformer capable of enhancing a cooling efficiency.SOLUTION: A cooling device (23) of an oil-filled transformer (1) comprises: a plurality of cooling panels (30), which are arranged in parallel in a state of being directed in a vertical direction, and in which an insulation oil (L) flows in an inner part; a blowing device (31) blowing in an upper direction from a lower part of the cooling panel; and a blowing adjuster (32). When a thickness direction of the cooling panel is defined as a Y direction and a direction orthogonal to the Y direction viewed from above is defined as an X direction, the cooling panel forms a plurality of cooling units (34) so as to be arranged in the Y direction, and the plurality of cooling units are arranged in the X direction. The blowing adjuster comprises: a first guide member (41) guiding blowing directed toward outside of each cooling unit in the Y direction to both sides of the cooling unit in the Y direction; and a second guide member (42) guiding the blowing directed between adjacent cooling units in the X direction to a direction along both surfaces in the Y direction of each cooling panel.SELECTED DRAWING: Figure 3

Description

The present invention relates to an oil-filled transformer, and more particularly to an oil-filled transformer cooled by insulating oil contained in a container.

A transformer is a device that converts the voltage of AC power by using electromagnetic induction, and is configured by accommodating an iron core constituting a magnetic circuit and windings constituting an electric circuit in a container. As such a transformer, as disclosed in Patent Document 1, a transformer in which an iron core and windings are housed in a container and the container is filled with insulating oil is known.

The transformer of Patent Document 1 is provided with a cooling device on the outside of the container. The cooling device includes a plurality of cooling panels in the shape of a flat bag, and a cooling fan for cooling by blowing air from the bottom to the top of the cooling panel. The cooling panels are arranged side by side in the thickness direction and the width direction, and when a plurality of cooling panels arranged in the thickness direction are arranged as one group, they are installed in four groups in the width direction. Has been done. A pair of wind guides are provided vertically at positions sandwiching the four groups of cooling panels from the width direction, and guides the air blown from the cooling fan upward along the cooling panel.

Jitsukaisho 62-23427 Gazette

However, in the configuration of Patent Document 1, the air blown from the cooling fan easily flows between the adjacent groups in the plurality of cooling panels, and the air blown on both sides in the thickness direction of the cooling panel is reduced, so that the cooling efficiency is improved. There is a problem that it decreases.

The present invention has been made in view of such a problem, and one of the objects of the present invention is to provide an oil-filled transformer capable of increasing cooling efficiency.

The oil-filled transformer according to the present invention is an oil-filled transformer including a container for accommodating windings, a magnetic core and insulating oil, and a cooling device provided outside the container for cooling the insulating oil. The cooling devices are arranged side by side in a state of being oriented in the vertical direction, and the insulating oil flows inside the plurality of cooling panels and the air blown upward from the lower part of the cooling panel. A device and a blower adjusting body disposed in the vicinity of the cooling panel are provided, and the thickness direction of the cooling panel is the first direction, and the direction orthogonal to the first direction from above is the second direction. As a direction, a plurality of the cooling panels are arranged in the first direction to form a cooling unit, a plurality of the cooling units are arranged in the second direction, and the blower adjusting body is the first of the cooling units. The blower of the blower toward the outside between the first guide member that guides the blower of the blower outward in the direction on both sides of the first direction of the cooling unit and the cooling unit adjacent to the second direction. Is provided with a second guide member that guides the cooling panel in a direction along both sides of the first direction.

According to the present invention, since the first guide member is provided, it is possible to prevent the wind from flowing out from both sides in the first direction of the cooling unit to the outside. Further, since the second guide member is provided, it is possible to suppress the flow of wind between the adjacent cooling units. As a result, each guide member can increase the amount of air flowing along both sides of the cooling panel, and can increase the cooling efficiency of the cooling device.

It is a vertical sectional view schematically showing the oil-filled transformer which concerns on this embodiment. FIG. 2A is a schematic perspective view of the cooling device, and FIG. 2B is a schematic perspective view of the blower adjusting body. 3A is a vertical sectional view of the cooling device, and FIG. 3B is a partial front view of the cooling device. 4A is a cross-sectional view similar to FIG. 3A of the conventional cooling device, and FIG. 4B is a front view similar to FIG. 3B of the conventional cooling device. It is the same front view as FIG. 3B of the cooling apparatus which concerns on a modification.

Hereinafter, the oil-immersed transformer according to the embodiment of the present invention will be described in detail with reference to the attached drawings. FIG. 1 is a vertical sectional view schematically showing an oil-immersed transformer according to the present embodiment. As shown in FIG. 1, the oil-immersed transformer 1 includes a magnetic core 2 constituting a magnetic circuit and a winding 3 wound around the magnetic core 2 to form an electric circuit, and has a predetermined frequency from a commercial AC power source or the like. AC power is supplied. Further, the oil-filled transformer 1 includes a container 10 for accommodating the magnetic core 2 and the winding 3.

Insulating oil L is contained (filled) in the container 10 as an insulating liquid in order to enhance the cooling effect and the dielectric strength of the magnetic core 2 and the winding wire 3. The liquid level L1 of the insulating oil L is set at a position higher than the uppermost end positions of the magnetic core 2 and the winding 3, and the magnetic core 2 and the winding 3 are all immersed in the insulating oil L.

The oil-filled transformer 1 includes an upper pipe 21, a lower pipe 22, a cooling device 23, and a circulation device 24 outside the container 10. One end of the upper pipe 21 is connected above the container 10, and one end of the lower pipe 22 is connected above the container 10. The other ends of the upper pipe 21 and the lower pipe 22 are connected to the cooling device 23, respectively, and the circulation device 24 is provided in the middle of the upper pipe 21.

The circulation device 24 is composed of an oil feed pump or the like, sucks the insulating oil L from the inside of the container 10 through the upper pipe 21, and returns the sucked insulating oil L to the container 10 via the cooling device 23 and the lower pipe 22. .. In other words, the insulating oil L is sent out in the order of the container 10, the upper pipe 21, the circulation device 24, the cooling device 23, the lower pipe 22, and the container 10 by driving the circulation device 24, and is circulated in the device (in FIG. 1). See the arrow). In this circulation, the insulating oil L heated by the heat generated from the magnetic core 2 and the winding 3 is cooled by the cooling device 23. The circulation of the insulating oil L may be a natural circulation utilizing the temperature change of the insulating oil L, and in this case, the circulation device 24 may be omitted. In short, the circulation device 24 is not essential and may not be used.

Subsequently, the configuration of the cooling device 23 will be described. Here, in the following description, the X direction, the Y direction, and the Z direction indicated by the arrows in each figure will be used as a reference. In the following embodiments, the X and Y directions are parallel to the horizontal direction and the Z direction is parallel to the vertical direction, but these directions are changed as long as the same functions as those of the embodiment can be exhibited. May be good.

FIG. 2A is a schematic perspective view of the cooling device, and FIG. 2B is a schematic perspective view of the blower adjusting body. As shown in FIG. 2A, the cooling device 23 includes a plurality of cooling panels 30 and a blower 31 provided below (-Z side) of the plurality of cooling panels 30 (see FIG. 3A, not shown in FIG. 2). And a blower adjusting body 32.

A plurality of cooling panels 30 are arranged side by side in a state of being directed in the vertical direction (Z direction). The cooling panel 30 has a substantially rectangular shape that is elongated vertically and vertically, and is formed in a bag shape that can form a space through which the insulating oil L flows.

In the cooling panel 30, the thickness direction is set as the first direction, and the first direction is set parallel to the Y direction in the present embodiment. Further, in the cooling panel 30, a direction orthogonal to the first direction when viewed from above, that is, a direction parallel to the X direction is set as the second direction.

A plurality of cooling panels 30 are arranged in the Y direction to form a cooling unit 34. Then, in the cooling device 23, a plurality of cooling units 34 are arranged side by side in the X direction.

Each cooling unit 34 includes an upper flow path 35 connected to the upper end side and a lower flow path 36 connected to the lower end side of each of the plurality of cooling panels 30 forming the cooling unit 34. The upper flow path 35 is connected to the upper pipe 21 (see FIG. 1), and the lower flow path 36 is connected to the lower pipe 22 (see FIG. 1) via a collecting pipe or the like (not shown). Therefore, in each cooling unit 34, the insulating oil L in the container 10 (see FIG. 1) flows from the upper pipe 21 through the upper flow path 35 into the plurality of cooling panels 30, and the container is passed through the lower flow path 36 and the lower pipe 22. It is returned to within 10.

3A is a vertical sectional view of the cooling device, and FIG. 3B is a partial front view of the cooling device. In addition, in FIG. 3A and FIG. 3B, a part of the configuration is omitted for the sake of simplification of the illustration. The blower device 31 is provided at each position directly below the plurality of cooling units 34, and blows air upward from the lower part of the cooling panel 30. Although the specific configuration of the blower 31 is not shown, it can be exemplified as an axial fan, and the width in the X direction is provided in a size corresponding to the width in the X direction of the cooling panel 30. ..

Returning to FIG. 2B, the blower adjusting body 32 includes a frame-shaped first guide member 41 and a plurality of second guide members 42 provided inside the first guide member 41.

The first guide member 41 is formed in a rectangular shape when viewed from the Z direction (vertical direction), and is formed in a frame shape that opens in the Z direction. The first guide member 41 includes a pair of short walls 43 forming both sides in the X direction and a pair of long walls 44 forming both sides in the Y direction, and is formed so as to form a series of closed loops.

Inside the first guide member 41, the lower end side of all the cooling units 34 is accommodated. As a result, as shown in FIG. 3A, the lower end side of each cooling unit 34 is covered with the long wall 44 of the first guide member 41 from both sides in the Y direction. Further, the first guide member 41 is provided at a position straddling between the blower 31 and the cooling panel 30 in the vertical direction.

The long wall 44 of the first guide member 41 is provided with an inner wall 45 extending inward from the lower end of the long wall 44, and the long wall 44 and the inner wall 45 are formed in an L-shaped cross-sectional shape.

As shown in FIG. 2B, each second guide member 42 extends in the Y direction so as to connect between the pair of long walls 44 of the first guide member 41, and is fixed to the long wall 44.

As shown in FIG. 3B, the second guide member 42 is provided between the cooling units 34 adjacent to each other in the X direction. The width of the second guide member 42 in the X direction is formed to be larger than the width of the gap between the adjacent cooling units 34 in the X direction. The second guide member 42 is arranged in a space above the upper end of the blower 31 and below the lower end of the cooling panel 30. The second guide member 42 is provided in a shape provided with a pair of inclined plates 42a, and can be configured by, for example, an angle member. In other words, the pair of inclined plates 42a have their lower ends connected to each other and are inclined in a direction gradually distant from the lower end toward the upper end in the X direction.

Here, the flow of air blown by the cooling device of the embodiment will be described in comparison with the conventional example shown in FIG. 4A is a cross-sectional view similar to FIG. 3A of the conventional cooling device, and FIG. 4B is a front view similar to FIG. 3B of the conventional cooling device. In addition, the conventional example of FIG. 4 is a configuration in which the blower adjusting body 32 in the cooling device 23 of the present embodiment is omitted, and the configuration common to the present embodiment will be described with the same reference numerals.

As shown in FIGS. 4A and 4B, even in the configuration of the conventional example, air is blown from the blower device 31 toward the upper cooling unit 34. At this time, in the conventional example, as shown in FIG. 4A, the amount of air flowing out from both sides of the cooling unit 34 in the Y direction to the outside increases, and the amount of air flowing between the cooling panels 30 adjacent to each other in the Y direction decreases. It will be easier. Further, in the conventional example, as shown in FIG. 4B, the amount of air flowing between the cooling units 34 adjacent to each other in the X direction increases, and the amount of air flowing along both sides of the cooling panel 30 in the Y direction tends to decrease.

On the other hand, in the present embodiment, as shown in FIG. 3A, the blown air of the blower device 31 toward the outside of the cooling unit 34 in the Y direction is blocked by the first guide member 41. Then, the first guide member 41 guides the blocked air so as to be along both sides of the cooling unit 34 in the Y direction so that the air flows along both sides of the cooling panels 30 adjacent to each other on both sides of the cooling unit 34 in the Y direction. become. In other words, the wind that has flowed out toward the outside of the cooling unit 34 in the conventional example flows between the cooling panels 30 in the present embodiment.

Further, in the present embodiment, as shown in FIG. 3B, the blown air of the blower device 31 directed between the cooling units 34 adjacent to each other in the X direction is blocked by the second guide member 42. Then, the second guide member 42 guides the blocked air toward the cooling panel 30 side, specifically, in the direction along both sides of the cooling panel 30 in the Y direction. In other words, in the conventional example, the wind flowing between the cooling units 34 adjacent to each other in the X direction flows between the cooling panels 30 adjacent to each other in the Y direction in the present embodiment.

As described above, according to the present embodiment, the first guide member 41 can prevent the outflow of wind from both sides in the Y direction of the cooling unit 34 to the outside, and the second guide member 42 further prevents the outflow of wind in the X direction. The flow of wind between the cooling units 34 adjacent to each other can be suppressed. Then, the flow of those winds can be guided along the wide surfaces on both sides in the Y direction of the cooling panel 30 to increase the amount of air flowing along the cooling panel 30, and the cooling efficiency in the cooling device 23 can be increased. You can try to rise.

Further, the first guide member 41 straddles a part of the lower end side of the blower 31 and the cooling panel 30, and the first guide member 41 does not cover the entire vertical direction of the cooling panel 30, and the wind to the outside is blown to the outside. It regulates the outflow. As a result, the material used as the first guide member 41 can be suppressed while improving the cooling efficiency, and the weight can be reduced and the assembly work can be facilitated.

Further, in the blower adjusting body 32, a plurality of second guide members 42 are fixed to the frame-shaped first guide member 41, and the assembly and handling can be facilitated by integrating them as parts.

Further, by forming the second guide member 42 with a pair of inclined plates 42a, the pressure loss of the wind blocked so as not to flow between the cooling units 34 adjacent to each other in the X direction is suppressed, and the cooling panel 30 side. I can guide you.

Further, the second guide member 42 is arranged in a space above the upper end of the blower device 31 and below the lower end of the cooling panel 30, so that the air blown from the blower device 31 is satisfactorily guided to the cooling panel 30 side. can do.

Further, in the present embodiment, since the plurality of cooling units 34 are juxtaposed in the X direction through the gap blocked by the second guide member 42, the cooling device 23 is suppressed from becoming larger in the X direction. It is possible to prevent the blown air of the blower device 31 from flowing out unnecessarily in the X direction. As a result, it is possible to save space in the cooling device 23 and improve the cooling efficiency.

The embodiment of the present invention is not limited to the above embodiment, and may be variously modified, replaced, or modified without departing from the spirit of the technical idea of the present invention. Further, if the technical idea of the present invention can be realized in another way by the advancement of the technology or another technology derived from the technology, it may be carried out by the method. Therefore, the scope of claims covers all embodiments that may be included within the scope of the technical idea of the present invention.

In the present embodiment, the configuration in which the present invention is applied to the oil-filled transformer 1 has been described, but it is also possible to apply the present invention to other static induction electric devices as long as the above-mentioned effects can be obtained.

It should be noted that the contents illustrated in the above embodiment show the shapes of the magnetic core 2, the winding 3, the container 10, the cooling panel 30, the first guide member 41, the second guide member 42, etc., if the above-mentioned effects can be exhibited. May be changed.

Further, the installation position and the number of installations of the blower 31 may be changed as long as the same functions as those of the above embodiment can be obtained, and for example, the configuration shown in the modified example of FIG. 5 may be used. FIG. 5 is a front view similar to FIG. 3B of the cooling device according to the modified example. In the modified example of FIG. 5, one blower device 31 is installed for the two cooling units 34, and the width of the blower device 31 in the X direction is expanded as compared with the above embodiment. Then, in FIG. 5, since the center position of the blower device 31 is arranged between the two cooling units 34, the second guide member 42 is arranged directly above the center of the blower device 31. Even in such a modification, the second guide member 42 can suppress the flow of air between the cooling units 34 adjacent to each other in the X direction to increase the cooling efficiency, and the blower 31 can be installed. It is also possible to reduce the number.

1 Oil-filled transformer 2 Magnetic core 3 Winding 10 Container 23 Cooling device 30 Cooling panel 31 Blower 32 Blower regulator 34 Cooling unit 41 1st guide member 42 2nd guide member 42a Inclined plate L Insulation oil

Claims (5)

An oil-filled transformer including a container for accommodating windings, a magnetic core and insulating oil, and a cooling device provided outside the container for cooling the insulating oil.
A plurality of the cooling devices are arranged side by side in a state of being oriented in the vertical direction, a plurality of cooling panels through which the insulating oil flows, a blower device for blowing air upward from the lower part of the cooling panel, and the above. A blower adjusting body arranged in the vicinity of the cooling panel is provided, and the thickness direction of the cooling panel is the first direction, and the direction orthogonal to the first direction from above is the second direction.
A plurality of the cooling panels are arranged in the first direction to form a cooling unit, and a plurality of the cooling units are arranged in the second direction.
The blower adjusting body is adjacent to the first guide member that guides the blown air of the blower outward in the first direction of the cooling unit to both sides of the first direction of the cooling unit and the second direction. An oil-filled transformer comprising: a second guide member for guiding the blow of the blower toward between the matching cooling units in a direction along both sides of the first direction of the cooling panel. The first guide member is characterized in that it is provided at a position straddling between the blower and the cooling panel in the vertical direction while covering the plurality of cooling units from the first direction. The oil-filled transformer described in. The oil-filled transformer according to claim 1 or 2, wherein the second guide member is fixed to the first guide member between the cooling units adjacent to each other in the second direction. The oil according to any one of claims 1 to 3, wherein the second guide member includes a pair of inclined plates whose lower ends are connected to each other and gradually separate from the lower end toward the upper end. On-transformer. The second guide member according to any one of claims 1 to 4, wherein the second guide member is arranged in a space above the upper end of the blower and below the lower end of the cooling panel. Oil-filled transformer.

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