CN209804415U - Safe dry-type power transformer - Google Patents
Safe dry-type power transformer Download PDFInfo
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- CN209804415U CN209804415U CN201921015281.2U CN201921015281U CN209804415U CN 209804415 U CN209804415 U CN 209804415U CN 201921015281 U CN201921015281 U CN 201921015281U CN 209804415 U CN209804415 U CN 209804415U
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Abstract
the utility model belongs to the transformer field relates to a safe dry-type power transformer, including unshakable in one's determination, low-voltage coil and high-voltage coil, the low-voltage coil includes low-voltage coil internal insulation layer, low-voltage coil metal level and low-voltage coil external insulation layer, the high-voltage coil includes high-voltage coil internal insulation layer, high-voltage coil metal level and high-voltage coil external insulation layer, the unshakable in one's determination includes central iron core layer and the middle iron core layer and the outermost iron core layer of symmetric distribution in central iron core layer both sides; wherein, a plurality of first trapezoidal grooves are correspondingly arranged on two sides of the central iron core layer and the middle iron core layer; a plurality of second trapezoidal grooves are correspondingly formed in the inner side of the outermost iron core layer and the adjacent side of the middle iron core layer; and a plurality of third trapezoidal grooves are correspondingly arranged on the adjacent sides of the adjacent middle iron core layers. According to the utility model discloses a safe type dry-type power transformer can show heat-sinking capability, voltage level and the capacity that improves the transformer when not increasing energy resource consumption and noise, is applicable to the installation in narrow and small or complicated space more and uses.
Description
Technical Field
the utility model belongs to the transformer field especially relates to a safe type dry-type power transformer.
Background
The iron core and the winding of the dry-type power transformer are not insulated by liquid, the problems of liquid leakage and environmental pollution do not exist, and the maintenance and the overhaul of the dry-type power transformer are more convenient than those of the traditional oil-immersed transformer, so that the dry-type power transformer is widely applied to occasions with higher requirements on the safe operation of electric power, such as high-rise buildings, subways, industrial and mining enterprises and the like. With the continuous development of power distribution systems, the performance requirements for dry power transformers are also increasing. The existing dry-type power transformer generally adopts natural cooling and forced cooling modes to dissipate heat, the dry-type power transformer adopting natural cooling has limited heat dissipation capacity, the heat generated in the actual operation process can accelerate the aging of the insulation structure of the transformer body, and the improvement of the voltage level and the capacity of the transformer is seriously limited; the dry-type power transformer adopting the forced cooling mode needs to be additionally provided with an auxiliary forced heat dissipation component outside the body, so that the consumption of electric energy required by operation can be greatly increased, and meanwhile, the noise of the transformer can be greatly increased by additionally adding the auxiliary component. How to improve the heat dissipation capacity of the dry-type power transformer while ensuring the comprehensive performance of the dry-type power transformer and achieve the effects of energy conservation and noise reduction has important significance.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model aims to provide a safe dry-type power transformer.
according to an aspect of the present invention, there is provided a safety dry-type power transformer, comprising an iron core, and a low voltage coil and a high voltage coil which are sequentially disposed outside the iron core, wherein the low voltage coil comprises a low voltage coil inner insulating layer, and a low voltage coil metal layer and a low voltage coil outer insulating layer which are sequentially disposed outside the low voltage coil inner insulating layer, and the high voltage coil comprises a high voltage coil inner insulating layer, and a high voltage coil metal layer and a high voltage coil outer insulating layer which are sequentially disposed outside the high voltage coil inner insulating layer, wherein the iron core comprises a central iron core layer, and a middle iron core layer and an outermost iron core layer which are symmetrically disposed on both sides of the central iron core layer; wherein, a plurality of first trapezoidal grooves are correspondingly arranged on two sides of the central iron core layer and the middle iron core layer; a plurality of second trapezoidal grooves are correspondingly formed in the inner side of the outermost iron core layer and the adjacent side of the middle iron core layer; and a plurality of third trapezoidal grooves are correspondingly arranged on the adjacent sides of the adjacent middle iron core layers.
According to the utility model discloses an exemplary embodiment, low voltage coil internal insulation layer sets up low voltage coil internal insulation layer tip air flue at its both ends, and the both ends inboard of low voltage coil internal insulation layer sets up and the iron core matching groove of shape assorted unshakable in one's determination, and the both sides of low voltage coil internal insulation layer are equipped with low voltage coil internal insulation layer side section, and the both ends outside of low voltage coil internal insulation layer sets up the outer terminal surface arc wall of low voltage coil internal insulation layer tip.
According to the utility model discloses an exemplary embodiment, the both sides of insulating layer side section evenly set up side section arc wall in the low-voltage coil, and the centre of insulating layer side section evenly sets up side section heterotypic air flue in the low-voltage coil.
According to the utility model discloses an exemplary embodiment, high tension coil internal insulation layer includes first air flue of alternative evenly distributed's high tension coil internal insulation and high tension coil internal insulation second air flue, and high tension coil internal insulation layer's inboard sets up the inboard arc wall of high tension coil internal insulation.
According to the exemplary embodiment of the present invention, the side section arc-shaped groove of the low-voltage coil inner insulation layer forms a side section arc-shaped air passage with the iron core end and the low-voltage coil metal layer, respectively; and the arc-shaped groove on the outer end face of the end part of the low-voltage coil inner insulating layer and the low-voltage coil metal layer form an air passage on the outer end face of the end part of the low-voltage coil inner insulating layer.
According to the utility model discloses an exemplary embodiment, high-voltage coil internal insulation inboard arc wall forms high-voltage coil internal insulation outside air flue with low voltage coil outer insulation layer.
According to the exemplary embodiment of the present invention, the low voltage coil inner insulating layer and the low voltage coil outer insulating layer are made of epoxy resin material.
According to the exemplary embodiment of the present invention, the high-voltage coil inner insulating layer and the high-voltage coil outer insulating layer are made of epoxy resin material.
Compared with the prior art, the utility model discloses a safe type dry-type power transformer through configuration optimization design and material optimization selection, has following advantage: 1) on the premise of not increasing external additional components, the heat dissipation capacity of the transformer can be obviously improved; 2) the heat dissipation capability is obviously improved, and meanwhile, the energy consumption and the noise are not increased; 3) the voltage level and the capacity of the transformer can be obviously improved; 4) the installation and application in narrow or complicated space are more applicable.
Drawings
Fig. 1 is a schematic cross-sectional view of a safety dry power transformer according to the present invention;
Fig. 2 is a schematic cross-sectional view of an iron core according to the present invention;
FIG. 3 is a schematic cross-sectional view of an inner insulation layer of a low voltage coil according to the present invention;
Fig. 4 is a schematic view of a partial structure of a side section of an inner insulating layer of a low-voltage coil according to the present invention;
Fig. 5 is a schematic cross-sectional view of the high voltage coil internal insulation according to the present invention;
Fig. 6 is a schematic partial cross-sectional view of a safety dry power transformer according to the present invention;
In the figure, 1-iron core, 2-low voltage coil, 3-high voltage coil, 21-low voltage coil inner insulating layer, 22-low voltage coil metal layer, 23-low voltage coil outer insulating layer, 31-high voltage coil inner insulating layer, 32-high voltage coil metal layer, 33-high voltage coil outer insulating layer; 11-a central iron core layer, 12-a middle iron core layer and 13-an outermost iron core layer; 211-an air passage at the end part of an inner insulating layer of the low-voltage coil, 212-an iron core matching groove, 213-an arc-shaped groove at the outer end face of the end part of the inner insulating layer of the low-voltage coil, and 214-a side section of the inner insulating layer of the low-voltage coil; 215-arc-shaped groove of side section, 216-special-shaped air passage of side section; 311-a first air passage insulated in the high-voltage coil, 312-a second air passage insulated in the high-voltage coil, and 313-an inner side arc-shaped groove insulated in the high-voltage coil; 14-iron core heat dissipation air passage, 217-side section arc air passage, 218-low voltage coil inner insulation layer end outer end face air passage, and 314-high voltage coil inner insulation layer outer side air passage.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, according to an exemplary embodiment of the present invention, there is provided a safety dry type power transformer, including an iron core 1, and a low voltage coil 2 and a high voltage coil 3 sequentially disposed outside the iron core 1. The low-voltage coil 2 comprises a low-voltage coil inner insulating layer 21, and a low-voltage coil metal layer 22 and a low-voltage coil outer insulating layer 23 which are sequentially arranged on the outer side of the low-voltage coil inner insulating layer 21. The high-voltage coil 3 comprises a high-voltage coil inner insulating layer 31, and a high-voltage coil metal layer 32 and a high-voltage coil outer insulating layer 33 which are sequentially arranged on the outer side of the high-voltage coil inner insulating layer 31.
Specifically, as shown in fig. 2, the iron core 1 includes a central iron core layer 11, and a middle iron core layer 12 and an outermost iron core layer 13 symmetrically distributed on both sides of the central iron core layer. Wherein, a plurality of first trapezoidal grooves are correspondingly arranged on two sides of the central iron core layer 11 and the middle iron core layer 12; a plurality of second trapezoidal grooves are correspondingly formed in the inner side of the outermost iron core layer 13 and the adjacent side of the middle iron core layer 12; a plurality of third trapezoidal grooves are provided correspondingly to the adjacent sides of the adjacent intermediate core layers 12, whereby a plurality of core heat dissipation air passages 14 are formed in the core 1. The long sides of the first trapezoid, the second trapezoid, and the third trapezoid, which are correspondingly disposed, are in close contact with each other, thereby forming the hexagonal core heat dissipation air duct 14.
Specifically, as shown in fig. 3, the low-voltage coil internal insulation layer 21 is provided with low-voltage coil internal insulation layer end gas passages 211 at both ends thereof (the low-voltage coil internal insulation layer end gas passages 211 may be provided in an elliptical shape). Core shape matching grooves 212 matched with the cores are arranged on the inner sides of the two ends of the low-voltage coil inner insulation layer 21. The outer end face arc-shaped grooves 213 of the end part of the low-voltage coil inner insulation layer are arranged on the outer sides of the two ends of the low-voltage coil inner insulation layer 21. The low-voltage coil inner insulating layer 21 is provided with side sections 214 on both sides thereof.
Fig. 4 shows a partial structure of the side section 214 of the insulating layer in the low-voltage coil. As can be seen from FIG. 4, the two sides of the side section 214 of the inner insulating layer of the low-voltage coil are uniformly provided with side section arc-shaped grooves 215, and the middle of the side section of the inner insulating layer of the low-voltage coil is uniformly provided with side section special-shaped air passages 216. The side section irregular air passage 216 can be arranged into a cross shape, a snowflake shape and the like.
As shown in fig. 5, the high-voltage coil inner insulating layer 31 includes a high-voltage coil inner insulating first air passage 311 and a high-voltage coil inner insulating second air passage 312 which are alternately distributed, and an inner side of the high-voltage coil inner insulating layer is provided with a high-voltage coil inner insulating inner arc-shaped groove 313. As can be seen from fig. 5, the first air passage 311 may have an elliptical shape, and the second air passage 312 may have a circular shape. Specifically, the high-voltage coil internal insulation first air passage 311 and the high-voltage coil internal insulation second air passage 312 are alternately distributed at two ends of the high-voltage coil internal insulation layer 31, and the high-voltage coil internal insulation first air passage 311 is arranged in the middle of the high-voltage coil internal insulation layer 31.
As shown in fig. 6, the arc-shaped slot 215 of the side section of the insulating layer 21 in the low-voltage coil forms an arc-shaped air passage 217 with the iron core and the metal layer 22 of the low-voltage coil; the arc-shaped groove 213 on the outer end face of the low-voltage coil inner insulating layer end of the low-voltage coil inner insulating layer 21 and the low-voltage coil metal layer 22 form an air passage 218 on the outer end face of the low-voltage coil inner insulating layer end; the inner insulation inner arc-shaped slot 313 of the high voltage coil and the outer insulation layer 23 of the low voltage coil form an outer air passage 314 of the inner insulation layer of the high voltage coil.
The low-voltage coil inner insulating layer 21 and the low-voltage coil outer insulating layer 23 in the exemplary embodiment of the present invention are made of epoxy resin material.
The high-voltage coil inner insulating layer 31 and the high-voltage coil outer insulating layer 33 in the exemplary embodiment of the present invention are made of epoxy resin material.
To sum up, the safety dry-type power transformer in the exemplary embodiment of the present invention, through the structural design, realizes the arrangement of multiple heat dissipation air passages, and under the premise of not needing to add an additional auxiliary heat dissipation component, can significantly improve the heat dissipation capability of the transformer, and at the same time, does not increase the energy consumption and noise, so that the safety dry-type power transformer is more suitable for installation and application in narrow or complex space; through the optimized selection of the insulating material, the excellent heat dissipation performance is integrated, and the voltage level and the capacity of the transformer can be remarkably improved.
the above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (8)
1. A safety dry-type power transformer is characterized by comprising an iron core, a low-voltage coil and a high-voltage coil, wherein the low-voltage coil and the high-voltage coil are sequentially arranged on the outer side of the iron core, the low-voltage coil comprises a low-voltage coil inner insulating layer, a low-voltage coil metal layer and a low-voltage coil outer insulating layer which are sequentially arranged on the outer side of the low-voltage coil inner insulating layer, the high-voltage coil comprises a high-voltage coil inner insulating layer, a high-voltage coil metal layer and a high-voltage coil outer insulating layer which are sequentially arranged on the outer side of the high-voltage coil inner insulating layer, and the iron core comprises a central iron core layer, and a middle iron core layer and an; wherein, a plurality of first trapezoidal grooves are correspondingly arranged on two sides of the central iron core layer and the middle iron core layer; a plurality of second trapezoidal grooves are correspondingly formed in the inner side of the outermost iron core layer and the adjacent side of the middle iron core layer; and a plurality of third trapezoidal grooves are correspondingly arranged on the adjacent sides of the adjacent middle iron core layers.
2. the safety dry-type power transformer according to claim 1, wherein the low-voltage coil inner insulation layer is provided with air passages at the ends of the low-voltage coil inner insulation layer, iron core matching grooves matching with the shape of the iron core are arranged on the inner sides of the two ends of the low-voltage coil inner insulation layer, the side sections of the low-voltage coil inner insulation layer are arranged on the two sides of the low-voltage coil inner insulation layer, and arc-shaped grooves are arranged on the outer end faces of the low-voltage coil inner insulation layer.
3. The safety dry-type power transformer of claim 2, wherein the two sides of the side section of the inner insulating layer of the low-voltage coil are uniformly provided with side section arc-shaped grooves, and the middle of the side section of the inner insulating layer of the low-voltage coil is uniformly provided with side section special-shaped air passages.
4. The safety dry-type power transformer according to claim 1, wherein the high voltage coil inner insulation layer comprises a first high voltage coil inner insulation air passage and a second high voltage coil inner insulation air passage which are alternately distributed, and an inner side of the high voltage coil inner insulation layer is provided with an inner side arc-shaped high voltage coil inner insulation groove.
5. The safety dry-type power transformer of claim 3, wherein the arc-shaped slots of the side sections of the insulating layer in the low-voltage coil form arc-shaped air passages of the side sections with the iron core and the metal layer of the low-voltage coil respectively; and the arc-shaped groove on the outer end face of the end part of the low-voltage coil inner insulating layer and the low-voltage coil metal layer form an air passage on the outer end face of the end part of the low-voltage coil inner insulating layer.
6. A safety dry-type power transformer according to claim 4, wherein the inner insulation inner arc-shaped slot of the high voltage coil and the outer insulation layer of the low voltage coil form an outer air passage of the inner insulation layer of the high voltage coil.
7. The safety dry-type power transformer of claim 1, wherein the low-voltage coil inner insulating layer and the low-voltage coil outer insulating layer are made of epoxy resin material.
8. the safety dry-type power transformer of claim 1, wherein the high-voltage coil inner insulation layer and the high-voltage coil outer insulation layer are made of epoxy resin material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921015281.2U CN209804415U (en) | 2019-07-02 | 2019-07-02 | Safe dry-type power transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921015281.2U CN209804415U (en) | 2019-07-02 | 2019-07-02 | Safe dry-type power transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209804415U true CN209804415U (en) | 2019-12-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921015281.2U Active CN209804415U (en) | 2019-07-02 | 2019-07-02 | Safe dry-type power transformer |
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| Country | Link |
|---|---|
| CN (1) | CN209804415U (en) |
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2019
- 2019-07-02 CN CN201921015281.2U patent/CN209804415U/en active Active
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