CN113823480A - Air-cooled dry-type transformer - Google Patents
Air-cooled dry-type transformer Download PDFInfo
- Publication number
- CN113823480A CN113823480A CN202010565041.0A CN202010565041A CN113823480A CN 113823480 A CN113823480 A CN 113823480A CN 202010565041 A CN202010565041 A CN 202010565041A CN 113823480 A CN113823480 A CN 113823480A
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- air
- heat dissipation
- coil heat
- coil
- air passage
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- 230000017525 heat dissipation Effects 0.000 claims abstract description 65
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 55
- 238000001816 cooling Methods 0.000 claims abstract description 49
- 229910052742 iron Inorganic materials 0.000 claims abstract description 22
- 239000011324 bead Substances 0.000 claims description 4
- 206010022000 influenza Diseases 0.000 claims 2
- 238000004804 winding Methods 0.000 abstract description 12
- 230000006872 improvement Effects 0.000 description 9
- 238000009434 installation Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000016507 interphase Effects 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/085—Cooling by ambient air
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2876—Cooling
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Coils Of Transformers For General Uses (AREA)
Abstract
The invention discloses an air-cooled dry-type transformer, which comprises an upper iron yoke, a lower iron yoke and an iron core, wherein the iron core comprises an iron core column and a coil, a coil heat dissipation air passage is arranged in the transformer, the coil heat dissipation air passage sequentially penetrates through the upper iron yoke, the coil and the lower iron yoke, an air passage inlet of the coil heat dissipation air passage is arranged on the upper iron yoke, an air passage outlet is arranged on the lower iron yoke, the transformer is positioned in a cooling air passage, the upper iron yoke faces the wind direction in the cooling air passage, and a wind shield capable of separating the cooling air passage is arranged on the periphery of the iron core. The invention has the advantages that cooling air can enter the iron core coil from the seal on the iron yoke to cool the coil, thereby improving the heat dissipation condition of the internal dead angle of the transformer winding and avoiding the overhigh temperature of the hot spot of the winding at the end part of the air outlet.
Description
Technical Field
The invention relates to electrical equipment, in particular to an air-cooled dry-type transformer.
Background
In the air-cooled transformer, the direction of airflow is parallel to the core limb, so that the airflow can enter the coil conveniently, but at the part shielded by the yoke, because of large internal wind resistance, cooling air is difficult to enter, so that the cooling wind speed difference at each position of the winding is large, especially at the interphase position of the transformer, the heat dissipation is very poor, the temperature of the hot spot at the end part of the air outlet of the winding is too high, and the temperature allowance at other positions is too large, thereby affecting the economical efficiency and reliability of the product.
Disclosure of Invention
The technical problem to be solved by the invention is to overcome the defects of the prior art, and provide the air-cooled dry-type transformer, wherein cooling air can enter the iron core coil from the seal on the iron yoke to cool the coil, so that the heat dissipation condition of the internal dead angle of the transformer winding is improved, and the overhigh temperature of the hot spot at the end part of the air outlet side of the winding is avoided.
In order to solve the technical problems, the invention adopts the following technical scheme:
the utility model provides an air-cooled dry-type transformer, includes yoke, lower yoke and unshakable in one's determination, unshakable in one's determination includes iron leg and coil, be equipped with coil heat dissipation air flue in the transformer, coil heat dissipation air flue runs through yoke, coil and yoke down in proper order, the air flue entry of coil heat dissipation air flue is established on last yoke, and the air flue export is established on yoke down, the transformer is located a cooling air duct, go up the wind direction in the yoke orientation cooling air duct, the periphery unshakable in one's determination is equipped with the deep bead that can cut off cooling air duct.
As a further improvement of the above technical scheme, the end face of the upper iron yoke is provided with air deflectors on both sides of the air passage inlet, the air deflectors are V-shaped plates, the tips of the V-shaped plates face outwards, and the two V-shaped plates form a horn mouth at the air passage inlet.
As a further improvement of the technical scheme, the air guide plates are arranged on the end face of the upper iron yoke and on two sides of the air passage inlet, the air guide plates are straight plates, and the two straight plates form a horn mouth at the air passage inlet.
As a further improvement of the technical scheme, the air channel inlet is in a long strip shape.
As a further improvement of the technical scheme, the air passage outlet is in a long strip shape.
As a further improvement of the technical scheme, the length of the air passage inlet is equal to that of the air passage outlet.
As a further improvement of the above technical solution, at least one coil heat dissipation air passage is provided, and each coil heat dissipation air passage is located on the same horizontal straight line along the wind direction in the cooling air passage.
As a further improvement of the above technical solution, when the coil heat dissipation air passage is set to be one, the length of the air deflector is greater than the length of the air passage inlet of the single coil heat dissipation air passage; when the coil heat dissipation air passages are arranged in a plurality, the length of the air deflector is larger than the sum of the lengths of the air passage inlets of the plurality of coil heat dissipation air passages.
As a further improvement of the technical scheme, the coil heat dissipation air passages are arranged in two groups, each group is at least provided with one coil heat dissipation air passage, and the two groups of coil heat dissipation air passages are arranged in parallel up and down along the wind direction in the cooling air passage.
As a further improvement of the technical scheme, the sum of the lengths of the inlets of the air passages of the two groups of coil heat dissipation air passages is equal, and the length of the air deflector is greater than the sum of the lengths of the inlets of the air passages of the each group of coil heat dissipation air passages.
Compared with the prior art, the invention has the advantages that:
(1) according to the air-cooled dry-type transformer, cooling air in the cooling air duct is blown to the end of the upper iron yoke in a face-to-face mode, enters the interior of the transformer coil from the air duct inlet, hot air comes out from the air duct outlet of the end of the lower iron yoke, and the coil cooling air duct is matched with the coil cooling channel, so that the interior of the coil is cooled, the cooling condition of the dead angle in the transformer winding is improved, the temperature rise of the hot spot of the transformer winding is reduced, the temperature rise of all parts in the coil is uniform, meanwhile, the phenomenon that the temperature of the hot spot at the end of the winding at the air outlet is overhigh, the temperature allowance of other parts is overlarge, the economical efficiency and reliability of a product are affected is avoided, and the size and weight of the transformer are reduced. In addition, all set up the deep bead between transformer coil outside all around and the cooling air duct, the purpose is for breaking air inlet side and air-out side, and the inside coil heat dissipation air flue of even entering transformer core of guide cooling air, air flue, coil surface etc. are everywhere in the coil, avoid the direct outlet side that flows to of cooling air, reduce the radiating efficiency.
(2) The invention relates to an air-cooled dry-type transformer, wherein air deflectors are arranged on the end surfaces of an upper yoke and on two sides of an air passage inlet, the air deflectors 7 are V-shaped plates, the tips of the V-shaped plates face outwards, the two V-shaped plates form a horn mouth at the air passage inlet, and the V-shaped plates have the following functions: the bellmouth (inboard inclined plane) guide cooling air gets into the air flue entry, and the guide avoids perpendicular windward side to lose too much wind energy, and the inclined plane (outside inclined plane) except the bellmouth guide cooling air gets into the inside of coil (except that coil heat dissipation air flue), improves the inside effect that the cooling air got into the coil greatly.
Drawings
Fig. 1 is a schematic structural diagram of a transformer in embodiment 1 of the present invention.
Fig. 2 is a schematic view of an installation state in which the transformer is turned over by 90 ° in embodiment 1 of the present invention.
Fig. 3 is an end view schematically illustrating an installation state in which the transformer is turned over by 90 ° in embodiment 1 of the present invention.
Fig. 4 is a side view schematically illustrating an installation state in which the transformer is turned over by 90 ° in embodiment 1 of the present invention.
Fig. 5 is a schematic view of the wind direction of the cooling wind of the transformer in embodiment 1 of the present invention.
FIG. 6 is a schematic end view showing a transformer in an inverted 90-degree installation state according to embodiment 2 of the present invention
Fig. 7 is a schematic view of the wind direction of the cooling wind of the transformer in embodiment 2 of the present invention.
The reference numerals in the figures denote:
1. an upper iron yoke; 2. a lower iron yoke; 3. an iron core; 31. a coil; 4. a coil heat dissipation air passage; 41. an airway inlet; 42. an airway outlet; 5. a cooling air duct; 6. a wind deflector; 7. an air deflector.
Detailed Description
The invention is described in further detail below with reference to the figures and specific examples of the specification.
Example 1
As shown in fig. 1 to 5, the air-cooled dry-type transformer of the present embodiment includes an upper yoke 1, a lower yoke 2, and an iron core 3, where the iron core 3 includes an iron core column and a coil 31, a coil heat dissipation air passage 4 is provided in the transformer, the coil heat dissipation air passage 4 sequentially penetrates through the upper yoke 1, the coil 31, and the lower yoke 2, an air passage inlet 41 of the coil heat dissipation air passage 4 is provided on the upper yoke 1, and an air passage outlet 42 is provided on the lower yoke 2. In practical use, the transformer is installed in a cooling air duct 5, the upper iron yoke 1 faces the wind direction in the cooling air duct 5, namely the transformer is installed by turning 90 degrees (from vertical to horizontal), and the periphery of the iron core 3 is provided with a wind shield 6 capable of separating the cooling air duct 5.
The cooling air in the cooling air duct 5 blows to the end of the upper iron yoke 1 in a head-on manner, enters the transformer coil 31 from the air duct inlet 41, the hot air comes out from the air duct outlet 42 at the end of the lower iron yoke 2, and the coil heat dissipation air duct 4 is matched with the heat dissipation channel in the coil 31, so that the inside of the coil 31 is cooled, the heat dissipation condition of the internal dead angle of the transformer winding is improved, the temperature rise of the hot spot of the transformer winding is reduced, the temperature rise of all parts in the coil 31 is uniform, meanwhile, the phenomenon that the temperature of the hot spot at the end part of the winding at the air outlet is overhigh, the temperature allowance of other parts is overlarge, the economical efficiency and the reliability of a product are influenced, and the volume and the weight of the transformer are reduced. In addition, all set up deep bead 6 between transformer coil 31 outside all around and cooling air duct 5, the purpose is for separating the air inlet side with the air-out side, and the inside coil heat dissipation air flue 4 of even entering transformer core of guide cooling air, and air flue, coil surface etc. are everywhere in the coil, avoid the direct outlet side that flows to of cooling air, reduce the radiating efficiency.
In this embodiment, 2 coil heat dissipation air ducts 4 are provided, and along the wind direction in the cooling air duct 5, each coil heat dissipation air duct 4 is located on the same horizontal straight line, as shown in fig. 3, the air duct inlets 41 of the two coil heat dissipation air ducts 4 are arranged in a line. The air duct inlet 41 is preferably elongated and the air duct outlet 42 is also preferably elongated. It is further preferred that the airway inlet 41 and the airway outlet 42 are of equal length. The quantity of the coil heat dissipation air passages 4 is reasonably selected, the effect of entering of cooling air can be controlled, it needs to be explained that the quantity of the coil heat dissipation air passages 4, the shapes of the air passage inlet and outlet and the like are set according to actual requirements, and only one specific example is given in the embodiment.
In this embodiment, the air deflectors 7 are disposed on both sides of the air duct inlet 41 on the end surface of the upper yoke 1, the air deflectors 7 are V-shaped plates, the tips of the V-shaped plates face outward, and as shown in fig. 2 and 4, the two V-shaped plates form a bell mouth at the air duct inlet 41. The V-shaped plate has the functions of: the bell mouth (inboard inclined plane) guide cooling air gets into air flue entry 41, and the guide avoids perpendicular windward side to lose too much wind energy, and the inclined plane (outside inclined plane) except the bell mouth guide cooling air gets into the inside of coil 31 (except that coil heat dissipation air flue 4), improves the inside effect that the cooling air got into the coil greatly. It should be noted that in other embodiments, the air deflector 7 may be a straight plate, and two straight plates form a bell mouth at the air duct inlet 41.
In the present embodiment, the length of the air deflector 7 is greater than the sum of the lengths of the air duct inlets 41 of the two coil heat dissipation air ducts 4. It should be noted that the length of the air deflector 7 may also be equal to or slightly smaller than the sum of the lengths of the air duct inlets 41 of the two coil heat dissipation air ducts 4, which mainly ensures that the intake air of the air duct inlets 41 is guided, and the size is not particularly limited, and only a specific example is given. In other embodiments, one coil heat dissipation air duct 4 may be provided, and the length of the air deflector 7 is greater than the length of the air duct inlet 41 of the single coil heat dissipation air duct 4, or equal to or slightly smaller than the length of the air duct inlet 41 of the single coil heat dissipation air duct 4.
In this embodiment, the cooling air in the cooling air duct 5 is generated by a fan. In other embodiments, the cooling air duct 5 may be attached to a running vehicle to form a running air cooling.
Example 2
As shown in fig. 6 and 7, the air-cooled dry-type transformer of the present embodiment is different from embodiment 1 only in that:
in this embodiment, the coil heat dissipation air passages 4 are arranged in two groups, each group is provided with 2 coil heat dissipation air passages 4, the two groups of coil heat dissipation air passages 4 are arranged in parallel up and down along the wind direction in the cooling air duct 5, the total number of the coil heat dissipation air passages 4 is 4, and the air passage inlets 41 of the coil heat dissipation air passages 4 are distributed as shown in fig. 6.
In this embodiment, the air deflectors 7 are disposed on both sides of the air duct inlet 41 of each group of coil heat dissipation air ducts 4, and 3 air deflectors 7 are disposed on two groups of coil heat dissipation air ducts 4, as shown in fig. 7.
In this embodiment, the sum of the lengths of the air duct inlets 41 of the two groups of coil heat dissipation air ducts 4 is equal, and the length of the air deflector 7 is greater than the sum of the lengths of the air duct inlets 41 of each group of coil heat dissipation air ducts 4. It should be noted that, in other embodiments, the length of the air deflector 7 may also be equal to or slightly less than the sum of the lengths of the air duct inlets 41 of each coil heat dissipation air duct 4.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make numerous possible variations and modifications to the present invention, or modify equivalent embodiments to equivalent variations, without departing from the scope of the invention, using the teachings disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should fall within the protection scope of the technical scheme of the present invention, unless the technical spirit of the present invention departs from the content of the technical scheme of the present invention.
Claims (10)
1. An air-cooled dry-type transformer, includes upper yoke (1), lower yoke (2) and unshakable in one's determination (3), unshakable in one's determination (3) include iron leg and coil (31), its characterized in that: be equipped with coil heat dissipation air flue (4) in the transformer, coil heat dissipation air flue (4) run through indisputable yoke (1), coil (31) and indisputable yoke (2) down in proper order, air flue entry (41) of coil heat dissipation air flue (4) are established on last indisputable yoke (1), and air flue export (42) are established on indisputable yoke (2) down, the transformer is located a cooling duct (5), go up indisputable yoke (1) towards the wind direction in cooling duct (5), the periphery of unshakable in one's determination (3) is equipped with deep bead (6) that can cut off cooling duct (5).
2. The air-cooled dry transformer of claim 1, wherein: the two sides of the end face of the upper iron yoke (1) at the air passage inlet (41) are respectively provided with an air deflector (7), the air deflectors (7) are V-shaped plates, the tips of the V-shaped plates face outwards, and the two V-shaped plates form a horn mouth at the air passage inlet (41).
3. The air-cooled dry transformer of claim 1, wherein: the two sides of the end face of the upper iron yoke (1) at the air passage inlet (41) are respectively provided with an air deflector (7), the air deflectors (7) are straight plates, and the two straight plates form a horn mouth at the air passage inlet (41).
4. The air-cooled dry transformer according to any one of claims 1 to 3, wherein: the air channel inlet (41) is long-strip-shaped.
5. The air-cooled dry transformer of claim 4, wherein: the air channel outlet (42) is in a long strip shape.
6. The air-cooled dry transformer of claim 5, wherein: the air channel inlet (41) and the air channel outlet (42) are equal in length.
7. An air-cooled dry transformer according to claim 2 or 3, wherein: the coil heat dissipation air passages (4) are at least one, and along the wind direction in the cooling air passage (5), the coil heat dissipation air passages (4) are located on the same horizontal straight line.
8. The air-cooled dry transformer of claim 7, wherein: when the coil heat dissipation air passage (4) is set to be one, the length of the air deflector (7) is larger than that of an air passage inlet (41) of the single coil heat dissipation air passage (4); when the coil heat dissipation air passages (4) are arranged in a plurality, the length of the air deflector (7) is larger than the sum of the lengths of the air passage inlets (41) of the plurality of coil heat dissipation air passages (4).
9. An air-cooled dry transformer according to claim 2 or 3, wherein: the coil heat dissipation air passages (4) are arranged in two groups, each group is at least provided with one coil heat dissipation air passage (4), and the two groups of coil heat dissipation air passages (4) are arranged in parallel from top to bottom along the wind direction in the cooling air passage (5).
10. The air-cooled dry transformer of claim 9, wherein: the lengths of the air flue inlets (41) of the two groups of coil heat dissipation air flues (4) are equal, and the length of the air deflector (7) is greater than the length of the air flue inlets (41) of each group of coil heat dissipation air flues (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010565041.0A CN113823480A (en) | 2020-06-19 | 2020-06-19 | Air-cooled dry-type transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010565041.0A CN113823480A (en) | 2020-06-19 | 2020-06-19 | Air-cooled dry-type transformer |
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| Publication Number | Publication Date |
|---|---|
| CN113823480A true CN113823480A (en) | 2021-12-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010565041.0A Pending CN113823480A (en) | 2020-06-19 | 2020-06-19 | Air-cooled dry-type transformer |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110254647A1 (en) * | 2010-04-14 | 2011-10-20 | Southern Transformers & Magnetics, Llc | Passive air cooling of a dry-type electrical transformer |
| CN202282228U (en) * | 2011-11-09 | 2012-06-20 | 保定天威风电科技有限公司 | Dry type transformer for offshore wind power |
| CN202887937U (en) * | 2012-11-06 | 2013-04-17 | 保定天威集团有限公司 | Iron core air flue with good heat-dissipating capacity |
| CN204045353U (en) * | 2014-06-06 | 2014-12-24 | 天津天能变压器有限公司 | A kind of large-scale dry-type transformer iron heat radiation air flue |
| CN205984594U (en) * | 2016-08-16 | 2017-02-22 | 河北工业大学 | Improve air flue heat -sinking capability's dry -type transformer |
| CN207637578U (en) * | 2017-11-22 | 2018-07-20 | 广州中车骏发电气有限公司 | A kind of dry-type transformer |
| CN108597762A (en) * | 2018-04-13 | 2018-09-28 | 江苏华辰变压器股份有限公司 | Novel horizontal type dry power transformer |
-
2020
- 2020-06-19 CN CN202010565041.0A patent/CN113823480A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110254647A1 (en) * | 2010-04-14 | 2011-10-20 | Southern Transformers & Magnetics, Llc | Passive air cooling of a dry-type electrical transformer |
| CN202282228U (en) * | 2011-11-09 | 2012-06-20 | 保定天威风电科技有限公司 | Dry type transformer for offshore wind power |
| CN202887937U (en) * | 2012-11-06 | 2013-04-17 | 保定天威集团有限公司 | Iron core air flue with good heat-dissipating capacity |
| CN204045353U (en) * | 2014-06-06 | 2014-12-24 | 天津天能变压器有限公司 | A kind of large-scale dry-type transformer iron heat radiation air flue |
| CN205984594U (en) * | 2016-08-16 | 2017-02-22 | 河北工业大学 | Improve air flue heat -sinking capability's dry -type transformer |
| CN207637578U (en) * | 2017-11-22 | 2018-07-20 | 广州中车骏发电气有限公司 | A kind of dry-type transformer |
| CN108597762A (en) * | 2018-04-13 | 2018-09-28 | 江苏华辰变压器股份有限公司 | Novel horizontal type dry power transformer |
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Effective date of registration: 20230612 Address after: 441000 No.1 Wolong Avenue North, high tech Zone, Xiangyang City, Hubei Province Applicant after: XIANGYANG CRRC ELECTRIC MACHINERY CO.,LTD. Applicant after: CRRC ZHUZHOU MECHANICAL AND ELECTRONIC TECHNOLOGY CO.,LTD. Address before: 441000 No.1 Wolong Avenue North, high tech Zone, Xiangyang City, Hubei Province Applicant before: XIANGYANG CRRC ELECTRIC MACHINERY CO.,LTD. |