CN219759335U - Primary energy efficiency dry-type transformer - Google Patents
Primary energy efficiency dry-type transformer Download PDFInfo
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- CN219759335U CN219759335U CN202320397095.XU CN202320397095U CN219759335U CN 219759335 U CN219759335 U CN 219759335U CN 202320397095 U CN202320397095 U CN 202320397095U CN 219759335 U CN219759335 U CN 219759335U
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- heat
- transformer
- cooling bin
- air
- primary energy
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- 238000001816 cooling Methods 0.000 claims abstract description 54
- 230000017525 heat dissipation Effects 0.000 claims abstract description 32
- 238000007906 compression Methods 0.000 claims abstract description 12
- 230000006835 compression Effects 0.000 claims abstract description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 9
- 238000010438 heat treatment Methods 0.000 claims description 11
- 238000009423 ventilation Methods 0.000 claims description 8
- 238000007664 blowing Methods 0.000 claims description 3
- 238000013461 design Methods 0.000 abstract description 7
- 238000009825 accumulation Methods 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 239000010410 layer Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 238000005057 refrigeration Methods 0.000 description 5
- 239000004065 semiconductor Substances 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- 230000005679 Peltier effect Effects 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
Landscapes
- Transformer Cooling (AREA)
Abstract
The utility model is applicable to the technical field of transformers, and provides a primary energy efficiency dry-type transformer which comprises a fixed shell, an iron core and a cooling bin, wherein the cooling bin is positioned at the bottom of the fixed shell; a plurality of insulating air pipes are vertically arranged in the first air duct, a refrigerating sheet and a heat conduction column are arranged in the insulating air pipes, a compression fan is arranged at one end of the cooling bin, a heat dissipation plate is arranged in the cooling bin, and the heat conduction column is in heat conduction connection with the heat dissipation plate. Therefore, the beneficial effect of this scheme is: heat on the transformer is introduced into the cooling bin through mutual matching between the heat conducting columns and the insulating air pipes of the refrigerating sheets, and then the heat dissipation plate is subjected to heat dissipation through the compression fan. The design ensures that all parts of the whole transformer can dissipate heat, and avoids the problem of local heat accumulation caused by the fact that some air channels cannot receive wind in the prior art.
Description
Technical Field
The utility model relates to the technical field of transformers, in particular to a primary energy efficiency dry-type transformer.
Background
Dry transformers are widely used in places such as local lighting, high-rise buildings, airports, wharf CNC mechanical equipment, etc., and simply referred to as transformers in which the iron core 2 and windings are not immersed in insulating oil.
In order to ensure the working performance of the dry-type transformer, the problem of overheating is avoided, so how to dissipate heat is one of the cores in the design of the dry-type transformer. Existing cooling modes are classified into natural air cooling (AN) and forced air cooling (AF). During natural air cooling, the transformer can continuously operate for a long time under rated capacity. When forced air cooling is performed, the output capacity of the transformer can be improved by 50%. The method is suitable for intermittent overload operation or emergency accident overload operation; the overload load loss and the impedance voltage increase are large in overload, and are in uneconomical operation states, so that the overload load is not continuously in overload operation for a long time. Forced air cooling generally selects a cross flow fan to be placed at the bottom of the transformer, the cross flow fan blows cooling air upwards or obliquely upwards, the cooling air passes through an air duct reserved on the transformer from bottom to top, and heat generated when the transformer works is taken away.
In order to obtain a larger heat dissipation area, the transformer is generally provided with an air duct in a surrounding manner, but is influenced by the wind direction and the wind direction angle of the cross flow fan 5, and the air duct in the middle area of the transformer often receives little wind, so that the whole transformer has the problem of accumulated heat.
In summary, the prior art has the inconvenience and defect of heat accumulation of the transformer in practical use, so that improvement is needed.
Disclosure of Invention
In order to achieve the above object, the present utility model provides a primary energy efficiency dry-type transformer, comprising:
the primary energy efficiency dry-type transformer comprises a fixed shell, an iron core and a cooling bin, wherein a hoisting frame is arranged at the top of the fixed shell, the cooling bin is positioned at the bottom of the fixed shell, a first air channel is vertically arranged in the fixed shell, and the iron core is sleeved in the first air channel; a plurality of insulating air pipes are vertically arranged in the first air flue, a refrigerating sheet and a heat conducting column are arranged in the insulating air pipes, the refrigerating sheet comprises a refrigerating surface and a heating surface, the refrigerating surface is connected with the inner wall of the insulating air pipes, and the heating surface is connected with the heat conducting column; one end of the cooling bin is provided with a compression fan, the cooling bin is internally provided with a heat dissipation plate, and the heat conduction column is in heat conduction connection with the heat dissipation plate.
Wherein, a plurality of heat radiation fins are arranged at the bottom of the heat radiation plate.
The inner wall of the insulating air pipe is provided with a plurality of heat conduction grooves, the heat conduction grooves are formed by recessing the inner wall of the insulating pipe towards the outer wall of the insulating pipe, and the refrigerating sheet is positioned in the heat conduction grooves.
Wherein, be provided with the heat conduction layer between heat conduction recess and the refrigeration piece.
Wherein, the heat conduction post is L-shaped heat pipe.
And a cross flow fan blowing towards the first air duct is arranged between the cooling bin and the fixed shell.
The air conditioner comprises a fixed shell, wherein a first air channel is arranged in the fixed shell, a second air channel is further arranged in the fixed shell, the first air channel is sleeved in the second air channel, a plurality of ventilation pipelines are arranged in the second air channel, and the structures of the ventilation pipelines are the same as those of the insulating air pipes.
The utility model aims to provide a primary energy efficiency dry-type transformer, which has the following beneficial effects:
firstly, heat on the transformer is introduced into a cooling bin through mutual matching between the heat conducting columns and the insulating air pipes of the refrigerating sheets, and then the heat dissipation plate is subjected to heat dissipation through the compression fan. The design ensures that all parts of the whole transformer can dissipate heat, and avoids the problem of local heat accumulation caused by the fact that some air channels cannot receive wind in the prior art.
And secondly, through the matching arrangement of the heat radiating plate and the heat radiating fins, the heat radiating area is increased, and the overall heat radiating speed is greatly accelerated.
And thirdly, the traditional cross flow fan is reserved, and the heat dissipation speed of the transformer is greatly accelerated through the cooperation between the two fans, so that the stable operation of the transformer is ensured.
Drawings
Fig. 1 is a front view of a group transformer;
fig. 2 is a structural diagram of a transformer;
FIG. 3 is a top view of the stationary housing;
FIG. 4 is a cross-sectional view of an insulated air duct;
FIG. 5 is an enlarged view of a portion of FIG. 4;
fig. 6 is a structural view of the cooling cartridge.
In the figure: 1-fixed shell, 11-lifting frame, 2-iron core, 3-cooling bin, 31-compression fan, 32-cooling plate, 33-cooling fin, 4-first wind channel, 41-insulating wind channel, 412-heat conducting layer, 42-refrigerating sheet, 421-refrigerating surface, 422-heating surface, 43-heat conducting column, 44-second wind channel, 441-ventilation pipeline.
Detailed Description
The present utility model will be described in further detail with reference to the accompanying drawings, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
Examples:
as shown in fig. 1-5, the primary energy efficiency dry-type transformer comprises a fixed shell 1, an iron core 2 and a cooling bin 3, wherein a lifting frame 11 is arranged at the top of the fixed shell 1, the cooling bin 3 is positioned at the bottom of the fixed shell 1, a first air duct 4 is vertically arranged in the fixed shell 1, and the iron core 2 is sleeved in the first air duct 4; a plurality of insulating air pipes 41 are vertically arranged in the first air duct 4, a refrigerating sheet 42 and a heat conducting column 43 are arranged in the insulating air pipes 41, the refrigerating sheet 42 comprises a refrigerating surface 421 and a heating surface 422, the refrigerating surface 421 is connected with the inner wall of the insulating air pipes 41, and the heating surface 422 is connected with the heat conducting column 43; one end of the cooling bin 3 is provided with a compression fan 31, the cooling bin 3 is internally provided with a heat dissipation plate 32, and the heat conduction column 43 is in heat conduction connection with the heat dissipation plate 32. In this scheme, in order to avoid appearing among the prior art, the unable wind that receives of transformer partial region to appear the problem of accumulated heat, this scheme utilizes heat conduction post 43 and refrigeration piece 42 complex mode, has introduced cooling storehouse 3 with the heat of fixed shell 1 from first wind channel 4, accelerates the heat dissipation speed on the heat conduction post 43 through compression fan 31. The working principle of the scheme is as follows: during operation of the transformer, the cooling fin 42 is activated when the temperature reaches a set point. On the other hand, the cooling surface 421 of the cooling fin 42 exchanges heat with the inner wall of the insulated duct 41, and heat is continuously transferred to the heat dissipating plate 32 through the heating surface 422 and the heat conducting column 43. At this time, the compression fan 31 is started, the compression fan 31 blows dry cold air, and the cold air takes away heat on the heat dissipation plate 32 in the flowing process, so that the transformer is cooled. On the other hand, in the insulating duct 41 provided vertically, the hot air is expanded by heat and becomes lighter, and flows out from the upper portion; relatively low-temperature air enters the insulating air duct 41 from the bottom of the insulating air duct 41, and air circulation is formed by one inlet and one outlet, and meanwhile, part of heat on the heat conducting column 43 and the heating surface 422 is taken away in the air recirculation process. Through the heat dissipation means in two aspects, the cooling of the transformer is completed, and the problem of heat accumulation in partial areas of the transformer caused by insufficient air quantity is avoided.
In this embodiment, the cooling fin 42 is a semiconductor cooling fin, and the heat-conducting pillar 43 is a heat pipe.
The semiconductor refrigeration sheet 42, also called thermoelectric refrigeration sheet 42, is a heat pump. Its advantages are no slide parts, limited space, high reliability and no pollution to refrigerant. By utilizing the Peltier effect of the semiconductor materials, when direct current passes through a couple formed by connecting two different semiconductor materials in series, heat can be absorbed and released at two ends of the couple respectively, and the purpose of refrigeration can be realized. The refrigerating technology for producing negative thermal resistance features no moving parts and high reliability.
The working principle of the heat pipe is as follows: when the evaporation section of the heat pipe is heated, the working liquid in the pipe core is heated and evaporated, heat is taken away, the heat is the evaporation latent heat of the working liquid, steam flows from the central channel to the condensation section of the heat pipe, is condensed into liquid, and simultaneously releases the latent heat, and the liquid flows back to the evaporation section under the action of capillary force. In this way, a closed cycle is completed, transferring a large amount of heat from the heating section to the heat-dissipating section.
As shown in fig. 4-6, the heat inside the transformer is continuously sent to the cooling bin 3 through the cooperation of the semiconductor refrigerating sheet and the heat pipe, and the whole cooling speed is increased by using the compression fan 31 and the heat dissipation plate 32.
In order to further increase the heat dissipation speed, as shown in fig. 6, it is preferable that a plurality of heat dissipation fins 33 are mounted at the bottom of the heat dissipation plate 32. The heat dissipation fins 33 are composed of a plurality of metal sheets having extremely high heat conductivity, and are intended to expand the heat dissipation area of the heat dissipation plate 32. In order to avoid that the heat sink fins 33 block the flow of the wind, the heat sink fins 33 are arranged laterally, i.e. the heat sink fins 33 are parallel to the horizontal plane.
In order to increase the heat dissipation speed, we can also increase the contact area between the cooling fin 42 and the insulated air duct 41. Preferably, a plurality of heat conducting grooves 411 are provided on the inner wall of the insulating air duct 41, the heat conducting grooves 411 are formed by recessing the inner wall of the insulating duct toward the outer wall of the insulating duct, and the cooling fins 42 are located in the heat conducting grooves 411. The cooling fin 42 is placed in the heat conductive groove 411 so that the cooling surface 421 can be merely fitted with the inner wall of the insulating duct 41, which increases the heat exchange area of both, thereby accelerating the heat exchange efficiency. Further, a heat conducting layer 412 is disposed between the heat conducting groove 411 and the cooling fin 42. The heat conducting layer 412 is formed by solidifying a heat conducting glue with a high heat conducting coefficient, and the purpose of the heat conducting layer is to fix the refrigerating sheet 42, so as to prevent the refrigerating sheet 42 from falling off due to vibration. Secondly, the gap between the refrigerating sheet 42 and the insulating air duct 41 is filled so that the refrigerating sheet and the insulating air duct 41 can be fully contacted. The heat-conducting glue is preferably insulating heat-conducting silica gel.
Increasing the heat transfer area increases the heat exchange rate, and therefore, the heat transfer pillar 43 is an L-shaped heat pipe. A section of the L-shaped heat pipe is welded or glued laterally to the heat sink 32, which makes the contact surface between the two sufficiently large. Preferably, the outer contour of the L-shaped heat pipe is elongated, and this design makes the contact surface between the heat conduction post 43 and the heat dissipation plate 32 or the cooling plate 42 not be a straight line, but an elongated contact surface.
In order to accelerate the heat dissipation speed, the cross flow fan in the prior art is reserved. Preferably, a cross flow fan 5 blowing towards the first air duct 4 is arranged between the cooling bin 3 and the fixed shell 1. The crossflow blower 5 accelerates the air flow efficiency in the insulated air duct 41, so that the cooling speed of the heat conducting post 43, the cooling plate 42 and the whole transformer is greatly accelerated.
As shown in fig. 3, further, a second air duct 44 is further disposed in the fixed housing 1, the first air duct 4 is sleeved in the second air duct 44, a plurality of ventilation ducts 441 are disposed in the second air duct 44, and the ventilation ducts 441 have the same structure as the insulating air duct 41. The double-layer air duct increases the heat dissipation area of the transformer and simultaneously reduces the weight of the transformer. The insulating air duct 41 and the ventilation duct 441 also function as reinforcing ribs, thereby increasing the firmness of the transformer.
In this solution, the lifting frame 11 is used to facilitate the transportation and movement of the transformer.
The cooling bin 3 in this solution comprises an air outlet, wherein the position of the air outlet is located at the side of the cooling bin 3.
In the scheme, the iron core 2 adopts low-loss high-quality silicon steel sheets, and the whole transformer achieves the effects of low loss and low noise through low magnetic density design and five-stage stepping design. The internal low-voltage coil adopts a foil winding process, high-quality copper foil is selected, interlayer insulation of the DMD is pre-soaked, and a high-temperature curing process is adopted, so that the overall strength is enhanced. The high-voltage coil is wound by adopting a high-voltage-resistant Wen Qibao wire, grid cloth is adopted between layers, and the whole coil is integrally formed by adopting a vacuum pouring process. The two air channels all adopt a large air channel structure, so that the heat dissipation efficiency is ensured, and the effects of low loss and low partial discharge are achieved.
In summary, the scheme has the following beneficial effects: firstly, heat on the transformer is introduced into the cooling bin 3 through the mutual matching between the heat conduction column 43 and the insulating air pipe 41 of the refrigerating sheet 42, and then the heat dissipation plate 32 is subjected to heat dissipation through the compression fan 31. The design ensures that all parts of the whole transformer can dissipate heat, and avoids the problem of local heat accumulation caused by the fact that some air channels cannot receive wind in the prior art. Secondly, through the cooperation setting of heating panel 32 and fin 33, increased the radiating area for holistic radiating rate accelerates greatly. And the traditional cross flow fan 5 is reserved, and the heat dissipation speed of the transformer is greatly accelerated through the cooperation between the two fans, so that the stable operation of the transformer is ensured.
The present utility model is capable of other and further embodiments and its several details are capable of modification and variation in light of the present utility model, as will be apparent to those skilled in the art, without departing from the spirit and scope of the utility model as defined in the appended claims.
Claims (7)
1. The primary energy efficiency dry-type transformer is characterized by comprising a fixed shell, an iron core and a cooling bin, wherein a hoisting frame is arranged at the top of the fixed shell, the cooling bin is positioned at the bottom of the fixed shell, a first air channel is vertically arranged in the fixed shell, and the iron core is sleeved in the first air channel; a plurality of insulating air pipes are vertically arranged in the first air flue, a refrigerating sheet and a heat conducting column are arranged in the insulating air pipes, the refrigerating sheet comprises a refrigerating surface and a heating surface, the refrigerating surface is connected with the inner wall of the insulating air pipes, and the heating surface is connected with the heat conducting column; one end of the cooling bin is provided with a compression fan, the cooling bin is internally provided with a heat dissipation plate, and the heat conduction column is in heat conduction connection with the heat dissipation plate.
2. The primary energy efficient dry transformer of claim 1, wherein a plurality of heat sink fins are mounted at the bottom of the heat sink plate.
3. The primary energy efficiency dry transformer of claim 1, wherein a plurality of heat conducting grooves are formed in the inner wall of the insulating air pipe in a manner that the inner wall of the insulating pipe is recessed toward the outer wall of the insulating pipe, and the refrigerating sheets are located in the heat conducting grooves.
4. The primary energy efficient dry transformer of claim 3, wherein a thermally conductive layer is disposed between the thermally conductive recess and the cooling fin.
5. The primary energy efficient dry transformer of claim 1 wherein the heat conducting post is an L-shaped heat pipe.
6. The primary energy efficiency dry transformer of claim 1, wherein a cross-flow fan blowing toward the first air duct is disposed between the cooling bin and the stationary housing.
7. The primary energy efficiency dry-type transformer according to claim 1, wherein a second air duct is further arranged in the fixed shell, the first air duct is sleeved in the second air duct, a plurality of ventilation pipelines are arranged in the second air duct, and the structure of the ventilation pipelines is the same as that of the insulating air duct.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320397095.XU CN219759335U (en) | 2023-03-06 | 2023-03-06 | Primary energy efficiency dry-type transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320397095.XU CN219759335U (en) | 2023-03-06 | 2023-03-06 | Primary energy efficiency dry-type transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219759335U true CN219759335U (en) | 2023-09-26 |
Family
ID=88071215
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320397095.XU Active CN219759335U (en) | 2023-03-06 | 2023-03-06 | Primary energy efficiency dry-type transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219759335U (en) |
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2023
- 2023-03-06 CN CN202320397095.XU patent/CN219759335U/en active Active
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