CN107369537B - High-power high-frequency transformer refrigerating system with forced internal guiding oil circulation cooling function - Google Patents
High-power high-frequency transformer refrigerating system with forced internal guiding oil circulation cooling function Download PDFInfo
- Publication number
- CN107369537B CN107369537B CN201710583715.8A CN201710583715A CN107369537B CN 107369537 B CN107369537 B CN 107369537B CN 201710583715 A CN201710583715 A CN 201710583715A CN 107369537 B CN107369537 B CN 107369537B
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- Prior art keywords
- oil
- transformer
- pipe
- copper
- composite coil
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- 238000001816 cooling Methods 0.000 title claims abstract description 64
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 60
- 229910052802 copper Inorganic materials 0.000 claims abstract description 40
- 239000010949 copper Substances 0.000 claims abstract description 40
- 239000002131 composite material Substances 0.000 claims abstract description 34
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 26
- 238000004804 winding Methods 0.000 claims description 6
- 238000013329 compounding Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 10
- 238000010438 heat treatment Methods 0.000 description 3
- 238000007654 immersion Methods 0.000 description 3
- 241001093269 Helicodiscus parallelus Species 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 239000000123 paper Substances 0.000 description 1
- 239000011087 paperboard Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
Classifications
-
- 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
- H01F27/2823—Wires
-
- 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
- H01F27/10—Liquid cooling
- H01F27/12—Oil cooling
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transformer Cooling (AREA)
Abstract
The invention provides a high-power high-frequency transformer refrigerating system with forced internal guiding oil circulation cooling, which is used for solving the problem that the iron core and the primary coil of the high-power high-frequency transformer are difficult to cool; comprises a transformer case, a composite coil, an oil pump and a refrigerating unit, wherein the composite coil and an iron core are arranged in the transformer case, the composite coil comprises a diversion copper pipe and a copper wire, wherein the copper wire is wound on the diversion copper pipe and is connected with a wiring terminal positioned at the outer side of the transformer case; the bottom of the transformer case is connected with an oil guide pipe, the oil guide pipe is connected with an oil pump, the oil pump is connected with a refrigerating unit through the oil guide pipe, and the refrigerating unit is connected with a diversion copper pipe through the oil guide pipe. The invention adopts the flow guide pipe in the coil to flow in the coil through the cooling oil, increases the refrigerating unit, realizes the cooling effect of the large-scale transformer, the device has the functions of eliminating local high temperature in the transformer, reducing the volume, having good cooling effect, prolonging the service life and saving energy.
Description
Technical Field
The invention relates to the technical field of transformer refrigeration, in particular to a high-power high-frequency transformer refrigeration system capable of forcing internal guiding oil to circulate and cool.
Background
When the transformer is in operation, heat generated by losses in the windings and the core must be dissipated in time to avoid insulation damage due to overheating. Since the loss of a transformer is proportional to its volume, as the capacity of the transformer increases, its volume and loss will increase in the form of the three-dimensional iron core, while the outer surface area increases only in the form of the two-dimensional iron core. For small-capacity transformers, the ratio of the external surface area to the volume of the transformer is relatively large, and the self-cooling mode can be adopted, so that heat can be dissipated through radiation and natural convection. The large-capacity transformer core and windings should be immersed in oil, and generally: oil immersion self-cooling, oil immersion air cooling and forced oil circulation cooling.
The oil immersion self-cooling brings heat to the oil tank wall and the radiating pipe by natural convection action of oil, and then radiates the heat by means of convection conduction of air, and no special cooling equipment is provided. The oil-immersed air-cooled type is characterized in that a fan is additionally arranged on the wall of an oil tank or a radiating pipe on the basis of oil-immersed self-cooled type, and the capacity of the transformer can be increased by 30% -35% after air cooling is additionally arranged by using a blower to assist cooling. Forced oil circulation cooling mode is divided into strong oil air cooling mode and strong oil water cooling mode, and the oil in the transformer is pumped into an oil cooler by an oil pump and then returned to the oil tank; the oil cooler is made into a special shape which is easy to dissipate heat, and the fan is used for blowing or circulating water is used as a cooling medium to take away heat, so that if the circulating speed of the oil is increased by 3 times compared with that of natural convection, the capacity of the transformer can be increased by 30%. The forced oil circulation guiding cooling mode basically belongs to the forced oil circulation type, and is mainly characterized in that oil ways of the transformer body part are different, and the transformer adopting the oil way guiding cooling structurally adopts certain measures (such as adding an oil baffle paper board and a paper cylinder) to enable oil to flow according to a certain path; the guide cooling is adopted, and the cold oil at the pump port is sent into the oil ducts among the coils, the wire cakes and the oil duct of the iron core under certain pressure, so that each part of the coils can be cooled, and the cooling efficiency can be improved.
In comparison, the following: the forced oil circulation guiding cooling mode solves the problem that the oil way in the oil tank of the common oil cooling transformer is disordered, so that the condition that the heating of the coil in the transformer is larger than the heating proportion of the iron core is improved. And belongs to a preferable scheme in large-scale transformer cooling application.
However, all cooling modes in the current market have the defects that oil paths are not circulated in place, the flow rate of cooling oil of coil sections among coils, iron cores and coils is not large, local parts are not cooled effectively, and local temperatures of certain sections and turns of the coils are high. For high-power, high-frequency and high-voltage transformers, as the requirements on power are larger and the requirements on volume are smaller, the contradiction between the capacity of cooling oil in a transformer box and the cooling effect is more obvious, and the requirements on better cooling measures are more urgent.
Disclosure of Invention
Aiming at the technical problems that the high-power transformer needs more cooling oil and the cooling effect is not obvious, the invention provides a high-power high-frequency transformer refrigerating system which forces internal guiding oil to circulate and cool, wherein a primary coil is used as an oil path conduit, and the circulating speed of the cooling oil in the transformer is greatly enhanced by utilizing the pressure of an oil pump, so that the temperature of each part of the coil and an iron core is uniformly balanced, the local temperature is not too high due to unsmooth flow guiding of the cooling oil, and the high cooling effect is achieved.
In order to solve the technical problems, the technical scheme of the invention is as follows: a high-power high-frequency transformer refrigerating system with forced internal guide oil circulation cooling comprises a transformer case, a compound coil, an oil pump and a refrigerating unit, wherein the compound coil is wound on an iron core of the transformer, the composite coil and the iron core are arranged in the transformer case, the composite coil comprises a diversion copper pipe and a copper wire, the copper wire is wound on the diversion copper pipe, and the copper wire is connected with a wiring terminal positioned at the outer side of the transformer case; the bottom of the transformer case is connected with an oil guide pipe, the oil guide pipe is connected with an oil pump, the oil pump is connected with a refrigerating unit through the oil guide pipe, and the refrigerating unit is connected with a diversion copper pipe through the oil guide pipe.
The copper wires are stranded copper wires, and an insulating layer is arranged on each copper wire; the oil guide pipe is a copper pipe, an insulating layer is arranged outside the oil guide pipe.
The refrigerating unit consists of a compressor refrigerating system and is fixed on the outer side of the transformer case.
The refrigerating unit is a heat radiating device fixed on the outer side of the transformer case.
The refrigerating method comprises the following steps:
step one: the composite coil is wound on the iron core as a primary winding, is connected with the output end of the transformer through a copper wire and a wiring terminal, and is immersed in oil in a case of the transformer;
step two: the oil pump pumps the oil in the transformer case into the refrigerating unit for cooling through the oil guide pipe;
step three: the composite coil is formed by compounding an oil guide copper pipe and a plurality of enameled wires, cooled oil enters the oil guide copper pipe of the composite coil, cooling oil in the oil guide copper pipe cools the iron core and the copper wires, and then the cooling oil flows into the bottom of the transformer case from the bottom of the oil guide copper pipe.
The invention uses forced internal guiding oil circulation cooling mode to cool, adopts the flow guiding pipe in the coil to flow in the coil through cooling oil, and adds a refrigerating unit, thereby realizing good cooling effect of the large transformer, filling the technical blank of the existing large transformer cooling device, and having the remarkable effects of eliminating local high temperature in the transformer, reducing the volume, having good cooling effect, prolonging the service life, saving energy sources and the like.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic structural diagram of a composite coil.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1 and 2, a high-power high-frequency transformer refrigerating system capable of forcing internal guiding oil to circulate and cool comprises a transformer case 5, a composite coil 1, an oil pump 2 and a refrigerating unit 3, wherein the composite coil 1 is wound on an iron core 4 of a transformer and serves as a primary winding of the iron core 4 of the transformer. The composite coil 1 and the iron core 4 are disposed in a transformer housing 5, and oil in the transformer housing 5 immerses the composite coil 1 and the iron core 4 therein. The lower end of the transformer case 5 is provided with rollers, so that the movement of the transformer case 5 in the transformer is facilitated. The composite coil 1 comprises a diversion copper pipe 11 and a copper wire 12, wherein the copper wire 12 is wound on the diversion copper pipe 11, and the work of the transformer is not affected. The copper wire 12 is connected with a wiring terminal 7 positioned at the outer side of the transformer case 5, and the wiring terminal 7 is a low-voltage sleeve, so that the connection with an input end is realized. The bottom of the transformer case 5 is connected with an oil guide pipe 6, the oil guide pipe 6 is connected with an oil pump 2, the oil pump 2 is connected with a refrigerating unit 3 through the oil guide pipe 6, and the refrigerating unit 3 is connected with a diversion copper pipe 11 through the oil guide pipe 6. The oil pump 2 increases the flow speed of cooling oil in the diversion copper pipe 11 of the composite coil so as to realize quick heat exchange. The composite coil 1 can be used as a primary coil and can also conduct oil path diversion to cool the iron core and the coil.
Preferably, the copper wire 12 is a multi-strand copper wire, and an insulating layer is arranged on the copper wire; the oil guide pipe 6 is a copper pipe, an insulating layer is arranged outside the oil guide pipe 6, and meanwhile, the electric conduction can be realized.
Preferably, the refrigerating unit 3 is composed of a compressor refrigerating system, is fixed on the outer side of the transformer case 5, and utilizes a compressor to realize cooling of oil in the oil guide pipe.
Preferably, the refrigerating unit 3 is a heat sink fixed to the outer side of the transformer case 5. Namely, the refrigerating unit 3 dissipates the heat of the oil in the transformer case 5, and eliminates or exchanges the working heat of the transformer to the outside of the transformer.
The refrigerating method comprises the following steps:
step one: the composite coil is formed by compounding an oil guide copper pipe and a plurality of strands of copper wires or enameled wires, the composite coil 1 is wound on the iron core 4 as a primary winding, the composite coil 1 is connected with the output end of the transformer through the copper wires 12 and the connecting terminals 7, and the iron core 4 and the composite coil 1 are immersed in oil in the transformer case 5;
step two: the oil pump 2 pumps the oil in the transformer case 5 into the refrigerating unit 3 through the oil guide pipe 6 for cooling;
step three: the cooled oil enters a guide copper pipe 11 of the composite coil 1, the cooling oil in the guide copper pipe 11 cools the iron core 4 and the copper wire 12, and then the cooling oil flows into the bottom of the transformer case 5 from the bottom of the guide copper pipe 11.
According to the invention, the oil guide pipe 6 is used for conveying cooled oil to the guide copper pipe 11 of the composite coil 1, the power action of the oil pump 2 forces the guide oil in the transformer case 5 to circulate, and the refrigerating unit 3 is used for cooling the guide oil, so that heat generated by the transformer is taken away, heat exchange is realized, and normal operation of the transformer is not influenced. Particular advantages are manifested in the following aspects:
the forced internal guiding oil circulation cooling mode is suitable for the inside of a large-scale high-frequency, high-voltage and large-function transformer, and plays a good role in cooling. The good cooling effect greatly promotes the service life extension of the equipment.
The built-in conduit type composite coil not only serves as a primary coil of a transformer, but also serves as a cooling oil circulation conduit. The use of the composite coil enables the cooling oil to flow to be uniformly distributed near the iron core and in the middle of the coil, and the fluidity is excellent, so that good heat exchange is obtained, and the coil and the insulating layer are prevented from being burnt out due to local heating.
The forced internal guiding oil circulation cooling method can reduce the capacity of cooling oil due to the obvious cooling effect, thereby greatly reducing the production cost while reducing the volume of the transformer.
The forced internal guiding oil circulation cooling mode adopts a refrigerating unit, so that an external heat exchange device of the transformer can be reduced, the whole volume is reduced, the electricity consumption of a cooling fan is saved, and the running cost is greatly reduced.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (3)
1. The high-power high-frequency transformer refrigerating system is characterized by comprising a transformer case (5), a composite coil (1), an oil pump (2) and a refrigerating unit (3), wherein the composite coil (1) is wound on an iron core (4) of the transformer, the composite coil (1) and the iron core (4) are arranged in the transformer case (5), the composite coil (1) comprises a diversion copper pipe (11) and a copper wire (12), the copper wire (12) is wound on the diversion copper pipe (11), and the copper wire (12) is connected with a wiring terminal (7) positioned outside the transformer case (5); the bottom of the transformer case (5) is connected with an oil guide pipe (6), the oil guide pipe (6) is connected with an oil pump (2), the oil pump (2) is connected with a refrigerating unit (3) through the oil guide pipe (6), and the refrigerating unit (3) is connected with a diversion copper pipe (11) through the oil guide pipe (6);
the refrigerating method comprises the following steps:
step one: the composite coil (1) is formed by compounding an oil guide copper pipe and a plurality of strands of copper wires, the composite coil (1) is wound on the iron core (4) as a primary winding, the composite coil (1) is connected with the output end of the transformer through the copper wires (12) and the connecting terminals (7), and the iron core (4) and the composite coil (1) are immersed in oil in a transformer case (5);
step two: the oil pump (2) pumps the oil in the transformer case (5) into the refrigerating unit (3) through the oil guide pipe (6) for cooling;
step three: the cooled oil enters a guide copper pipe (11) of the composite coil (1), the cooling oil in the guide copper pipe (11) cools the iron core (4) and the copper wire (12), and then the cooling oil flows into the bottom of the transformer case (5) from the bottom of the guide copper pipe (11);
the oil guide pipe (6) conveys cooled oil to the guide copper pipe (11) of the composite coil (1), the power action of the oil pump (2) forces the guide oil in the transformer case (5) to circulate, and the refrigerating unit (3) cools the guide oil, so that heat generated by the transformer is taken away, heat exchange is realized, and normal operation of the transformer is not affected.
2. The high-power high-frequency transformer refrigerating system with forced internal guiding oil circulation cooling according to claim 1, wherein the copper wires (12) are stranded copper wires, and an insulating layer is arranged on the copper wires; the oil guide pipe (6) is a copper pipe, and an insulating layer is arranged outside the oil guide pipe (6).
3. The high-power high-frequency transformer refrigerating system with forced internal guiding oil circulation cooling according to claim 1, wherein the refrigerating unit (3) consists of a compressor refrigerating system and is fixed outside the transformer case (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710583715.8A CN107369537B (en) | 2017-07-18 | 2017-07-18 | High-power high-frequency transformer refrigerating system with forced internal guiding oil circulation cooling function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710583715.8A CN107369537B (en) | 2017-07-18 | 2017-07-18 | High-power high-frequency transformer refrigerating system with forced internal guiding oil circulation cooling function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107369537A CN107369537A (en) | 2017-11-21 |
| CN107369537B true CN107369537B (en) | 2024-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710583715.8A Active CN107369537B (en) | 2017-07-18 | 2017-07-18 | High-power high-frequency transformer refrigerating system with forced internal guiding oil circulation cooling function |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113436844A (en) * | 2021-06-24 | 2021-09-24 | 上海辰光医疗科技股份有限公司 | Oil-cooled normally-conductive magnet and preparation method thereof |
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| CN206098082U (en) * | 2016-10-14 | 2017-04-12 | 蒋利娟 | Transformer with anti snow disaster function |
| CN206877796U (en) * | 2017-07-18 | 2018-01-12 | 鹤壁市华通分析仪器有限公司 | One kind forces the hydronic high-power high-frequency transformer refrigeration system of interior guiding oil |
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2017
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| CN1812014A (en) * | 2006-02-24 | 2006-08-02 | 中国科学院电工研究所 | Sleeve type evaporative cooling transformer with oil-tank |
| CN200990701Y (en) * | 2006-08-28 | 2007-12-12 | 高瑞安 | Internal thermal circulating radiator for cooling electro magnetic equipment |
| CN201340781Y (en) * | 2009-01-15 | 2009-11-04 | 周志林 | Improved water-cooled transformer |
| CN201435293Y (en) * | 2009-07-06 | 2010-03-31 | 周志林 | Transformer coil |
| JP2011142263A (en) * | 2010-01-08 | 2011-07-21 | Mitsubishi Electric Corp | Valve for oil-filled transformer, and the oil-filled transformer |
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| CN203311995U (en) * | 2013-06-22 | 2013-11-27 | 浙江申工变压器制造有限公司 | Water-cooling oil-immersed transformer |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN107369537A (en) | 2017-11-21 |
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