CN117316593A - Power transformer with energy-saving function - Google Patents
Power transformer with energy-saving function Download PDFInfo
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- CN117316593A CN117316593A CN202311539014.6A CN202311539014A CN117316593A CN 117316593 A CN117316593 A CN 117316593A CN 202311539014 A CN202311539014 A CN 202311539014A CN 117316593 A CN117316593 A CN 117316593A
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- 230000017525 heat dissipation Effects 0.000 claims abstract description 71
- 238000001816 cooling Methods 0.000 claims abstract description 46
- 238000004804 winding Methods 0.000 claims abstract description 40
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 39
- 239000000498 cooling water Substances 0.000 claims description 58
- 238000005192 partition Methods 0.000 claims description 18
- 230000007246 mechanism Effects 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 4
- 239000011148 porous material Substances 0.000 claims description 2
- 125000004122 cyclic group Chemical group 0.000 claims 3
- 230000000694 effects Effects 0.000 abstract description 18
- 230000005855 radiation Effects 0.000 description 12
- 238000000034 method Methods 0.000 description 10
- 230000008569 process Effects 0.000 description 8
- 238000004891 communication Methods 0.000 description 7
- 230000008901 benefit Effects 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000000191 radiation effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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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
- H01F27/10—Liquid cooling
- H01F27/12—Oil cooling
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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
- H01F27/10—Liquid cooling
- H01F27/16—Water 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
- H01F27/08—Cooling; Ventilating
- H01F27/22—Cooling by heat conduction through solid or powdered fillings
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transformer Cooling (AREA)
Abstract
The invention provides a power transformer with an energy-saving function, which is provided with a water-cooling circulation loop and comprises: the inner circulation pipes are arranged in gaps between the transformer windings and the main box in an array manner, and each inner circulation pipe extends vertically and the upper end and the lower end of each inner circulation pipe extend out of the main box; the outer circulation pipe is arranged outside the main tank in an array manner and extends vertically; the top radiator is arranged above the main box, and the upper ends of the inner circulating pipes and the outer circulating pipes are connected with the top radiator; the bottom radiator is arranged below the main box, and the lower ends of the inner circulating pipes and the outer circulating pipes are connected with the bottom radiator; the inner circulation pipe, the top radiator, the outer circulation pipe and the bottom radiator are connected to form a water cooling circulation loop. The transformer oil near the transformer winding is cooled directly and dynamically in a circulating way, so that the internal heat effect and the heat dissipation uniformity are improved, and the long-time energy-saving and safe operation of the power transformer is ensured.
Description
Technical Field
The invention relates to the technical field of transformers, and particularly provides a power transformer with an energy-saving function.
Background
The present power transformers are divided into oil-immersed and dry type, in which most of heavy loads are oil-immersed transformers. The oil immersed transformer is characterized in that a transformer winding consisting of an iron core and a coil is arranged in an oil tank, high-voltage and low-voltage outgoing line terminals are arranged at the top or two sides of the oil tank, an oil immersed self-cooling mode is generally adopted, natural heat dissipation is carried out through a metal shell, the heat dissipation condition is poor, the temperature of the transformer winding cannot be continuously and effectively controlled, the temperature of the transformer winding is easy to fluctuate greatly, the insulation of the transformer is seriously damaged, energy-saving operation cannot be realized, and the service life is rapidly reduced.
Therefore, technicians in the industry improve pure oil immersion self-cooling, and the oil immersion self-cooling effect is improved by combining water cooling, generally, a cooling water pipeline circulating structure is added on the surface of an oil tank shell, cooling water is in direct contact with the oil tank shell, and the temperature of the oil tank shell is reduced by absorbing heat of the oil tank shell through the cooling water. The oil immersed water cooling mode has a certain cooling effect on the transformer oil near the periphery of the oil tank shell.
However, the oil-immersed water cooling technique described above has the following drawbacks: the method comprises the following steps: the cooling water pipeline is only provided with the surface of the oil tank shell, the heat of the transformer oil is indirectly absorbed through the way of cooling the oil tank shell, the heat of the transformer oil needs to pass through the transformer tank body and then is absorbed by cooling water, a cooling circulation loop penetrating into the transformer oil cannot be formed, the heat of the transformer oil in the oil tank cannot be dynamically circulated and directly absorbed, the cooling water pipeline belongs to the static outward diffusion process of the heat of the transformer oil, and the temperature cooling effect of the transformer oil in the oil tank shell is poor; and two,: the transformer oil cooling device has the advantages that the heat of the transformer oil close to the winding is difficult to be dissipated, the temperature of the oil close to the oil tank shell is low, the temperature of the oil close to the oil tank shell is high, namely the technical problem of external heat and internal heat is solved, the cooling effect is good on the surface, the temperature of the transformer tank is maintained within a reasonable range, and the temperature of the transformer winding is actually higher than the reasonable temperature range; and thirdly,: the existing oil-immersed water-cooled heat dissipation structure is characterized in that a heat dissipation pipe arranged on the surface of a transformer box body is a single snake-shaped heat dissipation pipe, namely, a radiator is arranged outside the transformer box body, the water outlet end of the radiator is connected with the water return end of the radiator through a cooling water pipeline which surrounds the transformer box body for one circle or a plurality of circles, in the water circulation process, along the length of the heat dissipation pipe, the temperature of the heat dissipation pipe can be gradually increased along with the continuous absorption of the heat of the transformer box body, for example, the temperature of the heat dissipation pipe is 75 ℃ at the first box wall of the transformer box body, which is close to the water outlet end, of the heat dissipation pipe is 95 ℃, the temperature of the second box wall of the transformer box body, which is close to the water return end, is not uniform in temperature, and the temperature of different box walls of the transformer box body is easy to cause the temperature difference of each side of a transformer winding. The problem of "cold while hot" arises. The above disadvantages cannot guarantee the energy-saving and safe operation of the transformer.
Disclosure of Invention
Based on the above, the invention provides the power transformer with the energy-saving function, so as to realize direct and dynamic circulating cooling of the transformer oil near the transformer winding, thereby effectively reducing the temperature of the transformer oil near the transformer winding, improving the internal heat effect and the overall heat dissipation uniformity, and ensuring the long-time energy-saving and safe operation of the power transformer.
In order to achieve the above object, the present invention provides a power transformer with an energy-saving function, in which a transformer winding is installed in a main tank and is filled with transformer oil, an oil tank is connected with the main tank, the power transformer is provided with a water-cooling circulation loop, comprising: the inner circulation pipes are arranged in gaps between the transformer windings and the main box in an array manner, and each inner circulation pipe extends vertically and the upper ends and the lower ends of the inner circulation pipes extend out of the main box; the outer circulation pipe is arranged outside the main tank in an array manner and extends vertically; the top radiator is arranged above the main box, and the upper ends of the inner circulating pipe and the outer circulating pipe are connected with the top radiator; the bottom radiator is arranged below the main tank, the lower ends of the inner circulating pipes and the outer circulating pipes are connected with the bottom radiator, and a water circulation driving mechanism for driving cooling water to flow from the inner circulating pipes to the outer circulating pipes is arranged in the bottom radiator; the inner circulation pipe, the top radiator, the outer circulation pipe and the bottom radiator are connected to form the water cooling circulation loop, and cooling water is filled in the water cooling circulation loop.
Further, the top radiator is arranged in a horizontal plane right above the main tank and is in a closed annular structure, each inner circulating pipe is connected with the inner side of the bottom of the top radiator, each outer circulating pipe is connected with the outer side of the bottom of the top radiator, and the heat conduction performance of the bottom material of the top radiator is lower than that of the surfaces in other directions.
Further, an annular core tube with the trend consistent with that of the top radiator is arranged in the top radiator, the annular core tube is arranged in the radial section of the top radiator in the middle, the first end of the main box is connected with the first end of the annular core tube through a first communicating tube, and the second end of the main box is connected with the second end of the annular core tube through a second communicating tube.
Further, the first communicating pipe and/or the second communicating pipe are/is provided with an oil circulation driving mechanism so as to drive the transformer oil of the main tank to flow to the first end of the annular core pipe through the first communicating pipe, flow to the second end of the annular core pipe from the first end of the annular core pipe, and flow to the main tank from the second communicating pipe at the second end of the annular core pipe.
Further, a plurality of heat dissipation guide plates extending outwards are arranged on the periphery of the annular core tube in an array mode, the outer ends of the heat dissipation guide plates extend out of the top radiator, and the heat dissipation guide plates are obliquely arranged and different in angle.
Further, the bottom radiator is divided into a central cavity and an outer cavity through an annular heat dissipation partition plate, the outer cavity surrounds the outside of the central cavity, the lower end of each inner circulation pipe is connected with the central cavity, each outer circulation pipe is connected with the outer cavity, and the annular heat dissipation partition plate is provided with a first inner connection through hole for communicating the central cavity with the outer cavity.
Further, a water circulation driving mechanism for driving cooling water to flow from the central cavity to the outer cavity is arranged in the central cavity so as to drive the cooling water to flow from the inner circulation pipe downwards to the outer circulation pipe through the bottom radiator and from the outer circulation pipe upwards to the inner circulation pipe through the top radiator.
Further, a plurality of layers of annular heat dissipation partition plates which are concentrically arranged are arranged in the bottom radiator, the annular heat dissipation partition plates divide the outer cavity into a plurality of layers of outer cavities which encircle the outside of the central cavity, the outer circulation pipes are respectively connected with the outer cavities of all layers, and second inner connection through holes which are communicated with the adjacent outer cavities are formed in each layer of annular heat dissipation partition plates.
Further, the central cavity is divided into an upper cavity and a lower cavity by a transverse partition plate provided with a central through hole, each inner circulating pipe is communicated with the upper cavity, and the water circulation driving mechanism comprises a water circulation impeller arranged in the lower cavity.
Further, the lower extreme of annular heat dissipation baffle stretches out outside the casing of bottom radiator, the part that annular heat dissipation baffle is located outside the casing is provided with outer intercommunicating pore, the bottom center of annular heat dissipation baffle is provided with the air cycle impeller that drive air flowed, and driving motor sets up in bottom radiator below and is connected with air cycle impeller and hydrologic cycle impeller drive.
Further, the top radiator is arranged at intervals with the top of the main tank, the connecting terminals connected with the transformer windings extend outwards from the center of the annular structure of the top radiator, the main tank is externally provided with the lamellar radiating fins, and the oil storage tank is arranged outside the annular structure of the top radiator.
The technical advantages of the power transformer with the energy-saving function provided by the invention are at least as follows:
the power transformer is provided with a water-cooling circulation loop formed by connecting an inner circulation pipe, a top radiator, an outer circulation pipe and a bottom radiator, in the operation process of the transformer, cooling water directly absorbs heat of transformer oil near the transformer winding through the inner circulation pipe passing through a gap between the transformer winding and a main tank, the cooling water after absorbing the heat carries out primary heat radiation through the bottom radiator, then is conveyed to the top radiator through the outer circulation pipe to carry out secondary heat radiation, and the cooled cooling water enters the inner circulation pipe again, so that the cooling water is circulated and reciprocated, the direct cooling of the transformer oil is realized, the heat conduction and the heat radiation through a transformer tank body are not required, the heat radiation path is simplified, the heat radiation effect is effectively improved, the temperature of the transformer oil near the transformer winding can be directly reduced, and the phenomenon of external cooling and internal heating is avoided;
and the inner circulation pipes are arranged on the periphery of the transformer winding in an array manner, each inner circulation pipe absorbs heat of transformer oil respectively and is mixed with the inner radiator and the outer radiator respectively, so that the temperature of each inner circulation pipe is balanced, the temperature of each side of the winding is balanced and absorbed, the phenomenon of cooling while heating is avoided, the heat dissipation efficiency and the balance are improved, and the energy-saving and safe operation of the transformer is effectively ensured.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:
fig. 1 is a schematic perspective view of an embodiment of a power transformer with energy saving function;
fig. 2 is a schematic diagram of a front view structure of an embodiment of a power transformer with energy saving function;
FIG. 3 is a cross-sectional view in the C-C direction of FIG. 2;
FIG. 4 is a schematic diagram of a side view of an embodiment of a power transformer with power saving function;
FIG. 5 is a cross-sectional view in the D-D direction of FIG. 4;
FIG. 6 is an enlarged partial schematic view at A of FIG. 5;
FIG. 7 is a schematic diagram of a flow of water cooling circulation heat dissipation;
FIG. 8 is a schematic perspective view of the top heatsink with portions of the housing removed;
FIG. 9 is a schematic top view of the top heatsink with portions of the housing removed;
FIG. 10 is a schematic view of the bottom heatsink with portions of the housing removed;
fig. 11 is a cross-sectional view in the E-E direction of fig. 4.
The attached drawings are used for identifying and describing:
1-a main box and 11-lamellar radiating fins;
2-an oil storage tank;
3-transformer windings, 31-connection terminals;
4-an inner circulation tube;
5-an outer circulation pipe, 51-a circumferential heat dissipation fin;
6-top radiator, 61-annular core tube, 62-heat radiation guide plate, 63-oil circulation driving pump, 64-first communicating tube and 65-second communicating tube;
7-bottom radiator, 71-central cavity, 711-upper cavity, 712-lower cavity, 72-outer cavity, 73-inner connecting hole, 74-water circulation impeller, 75-outer connecting hole, 76-air circulation impeller, 77-annular heat dissipation baffle, 78-transverse baffle, 79-driving motor.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
The existing oil-immersed water-cooling heat dissipation mode of the power transformer has the defects that a cooling water pipeline is only provided with the surface of an oil tank shell, the heat of transformer oil is indirectly absorbed by the way of cooling the oil tank shell, a cooling circulation loop penetrating into the transformer oil cannot be formed, the heat of the transformer oil in the oil tank cannot be dynamically circulated and directly absorbed, and the temperature cooling effect of the transformer oil in the oil tank shell is poor; in addition, the heat of the transformer oil close to the winding is difficult to be dissipated, and the problems that the temperature of the oil temperature of the part close to the oil tank shell is low, and the temperature of the oil temperature close to the oil tank shell and the temperature of the oil temperature close to the transformer winding are high are caused; in addition, the existing oil-immersed water-cooling heat dissipation structure is characterized in that a radiating pipe arranged on the surface of a transformer box body is a single snake-shaped radiating pipe, and in the water circulation process, along with the continuous absorption of heat of the transformer box body, the temperature of the radiating pipe can be gradually increased, so that the problem of unbalanced temperature of different box walls of the transformer box body is caused, and the temperature of each side of a transformer winding is easily caused to be different.
In order to solve the technical problems, the invention provides the technical scheme that: the power transformer with the energy-saving function is provided with a water-cooling circulation loop, an inner circulation pipe array is arranged in a gap between a transformer winding and a main box, and each inner circulation pipe extends vertically and the upper end and the lower end of each inner circulation pipe extend out of the main box; the outer circulation pipe array is arranged outside the main tank and extends vertically; the top radiator is arranged above the main box, and the upper ends of the inner circulating pipes and the outer circulating pipes are connected with the top radiator; the bottom radiator is arranged below the main box, and the lower ends of the inner circulating pipes and the outer circulating pipes are connected with the bottom radiator; the inner circulation pipe, the top radiator, the outer circulation pipe and the bottom radiator are connected to form a water cooling circulation loop. The transformer oil near the transformer winding is cooled directly and dynamically in a circulating way, so that the internal heat effect and the heat dissipation uniformity are improved, and the long-time energy-saving and safe operation of the power transformer is ensured.
As shown in fig. 1 to 11, in an embodiment of a power transformer with energy saving function provided by the present invention, a transformer winding 3 is installed in a main tank 1 and is filled with transformer oil, an oil tank 2 is connected with the main tank 1, the power transformer is provided with an inner circulation pipe 4, an outer circulation pipe 5, a top radiator 6 and a bottom radiator 7, and the inner circulation pipe 4, the top radiator 6, the outer circulation pipe 5 and the bottom radiator 7 are connected to form a water cooling circulation loop.
As shown in fig. 3 and 5, in which the inner circulation pipes 4 are arranged in an array in a gap between the transformer winding 3 and the main tank 1, each of the inner circulation pipes 4 extends vertically and has upper and lower ends extending from the main tank 1, and each of the inner circulation pipes 4 is independently disposed between the top radiator 6 and the bottom radiator 7, that is, each of the inner circulation pipes 4 is in a parallel relationship rather than in a series relationship, so that it is advantageous to maintain the temperature balance of each of the inner circulation pipes, and in practice, the inner circulation pipes 4 are made of a material having good heat conductivity, such as copper pipe, aluminum pipe or alloy pipe, so that heat of transformer oil outside the inner circulation pipes 4 can be efficiently transferred to cooling water inside the inner circulation pipes 4, and the circulated cooling water further transfers the heat to outside the main tank.
As shown in fig. 1, 2 and 4, wherein an outer circulation pipe 5 is arranged in an array outside the main tank 1 and extends vertically, the outer circulation pipe surface being provided with a circumferential radiator 51 around the outer circumference; in the implementation, the outer circulation pipe 5 adopts copper pipes, aluminum pipes or alloy pipes, the outer circulation pipe 5 and the main tank 1 are arranged at intervals, meanwhile, the surface of the outer circulation pipe 5 can be provided with radiating fins, and heat is radiated into the air in the flowing process of the cooling water in the outer circulation pipe 5, so that the radiating effect similar to a radiator is achieved.
As shown in fig. 1, 2 and 8, wherein a top radiator 6 is provided above the main tank 1, and upper ends of each of the inner circulation pipe 4 and the outer circulation pipe 5 are connected to the top radiator 6; in operation of the water-cooled circulation circuit, the top radiator 6 functions: on the one hand, the cooling water flows back from each outer circulation pipe 5 to the top radiator 6, is mixed in the top radiator, and then is conveyed to each inner circulation pipe 4, and the uniformity of the temperatures of the inner circulation pipe 4 and the outer circulation pipe 5 is improved through the mixing effect; on the other hand, the flow area of the cooling water in the top radiator 6 is enlarged, the flow speed is reduced, and the cooling water radiates heat outwards through the top radiator shell contacted with air to play a role in primary cooling;
as shown in fig. 1, 2 and 10, a bottom radiator 7 is arranged below the main tank 1, the lower ends of the inner circulation pipes 4 and the outer circulation pipes 5 are connected with the bottom radiator 7, and a water circulation driving mechanism for driving cooling water to flow from the inner circulation pipes 4 to the outer circulation pipes 5 is arranged in the bottom radiator 7; the bottom radiator 7 functions: on the one hand, the cooling water flows back to the bottom radiator 7 from each inner circulating pipe 4, is conveyed by the outer circulating pipe 5 of the tank after being mixed in the bottom radiator 7, and can keep the mixing property of the cooling water of each inner circulating pipe 4 and the outer circulating pipe 5 through the mixing process in the bottom radiator 7, so that the temperature balance of each inner circulating pipe 4 is improved, and the consistency of the cooling effect of each side of the transformer winding 3 is favorably kept; on the other hand, the flow area of the cooling water in the bottom radiator 7 is enlarged, the flow speed is reduced, and the cooling water can effectively radiate heat to the outside air, so that the cooling effect of the other time is achieved.
As shown in fig. 7, the working principle of the power transformer with the energy-saving function is as follows: the cooling water in the water cooling circulation loop realizes reciprocating circulation according to the steps of inner circulation pipes 4, bottom radiator, outer circulation pipes, top radiator and inner circulation pipes … … under the action of a water circulation driving mechanism in the bottom radiator. In the process of the cooling water reciprocating circulation, the cooling water passes through a plurality of inner circulation pipes 4 which are arranged in parallel to absorb the heat of a transformer near the transformer winding 3; the cooling water of each inner circulation pipe 4 is mixed in the bottom radiator and is respectively conveyed to each outer circulation pipe, so that the temperature balancing effect is achieved, and the heat dissipation of low flow velocity to the outside air is realized; the cooling water passes through a plurality of outer circulation pipes 5 which are arranged in parallel and dissipates heat to the outside air; the cooling water of each outer circulation pipe 5 is mixed again in the top radiator, and is respectively conveyed to each inner circulation pipe 4, so that the temperature equalization effect is achieved, and the heat dissipation 5 of low flow velocity to the outside air is realized.
In the power transformer with the energy-saving function, in the operation process of the transformer, the cooling water directly absorbs the heat of the transformer oil near the transformer winding through the inner circulating pipe passing through the gap between the transformer winding and the main tank, the cooling water after absorbing the heat carries out primary heat radiation through the bottom radiator, then is conveyed to the top radiator through the outer circulating pipe to carry out secondary heat radiation, the cooled cooling water enters the inner circulating pipe again, and thus the cooling water circulated and discharged by the inner circulating pipe 4 radiates the heat to the air through the bottom radiator 7, the outer circulating pipe 5 and the top radiator 6, so that the heat radiation sufficiency under the short-path condition is improved.
In addition, the power transformer with the energy-saving function realizes the direct cooling of the transformer oil, simplifies the heat dissipation path, effectively improves the heat dissipation effect, can directly reduce the temperature of the transformer oil near the transformer winding, and avoids the occurrence of external cooling and internal heating; the heat of the transformer oil is absorbed by each inner circulating pipe which is arranged in parallel respectively, and the inner radiator and the outer radiator are mixed respectively, so that the temperature of each inner circulating pipe is balanced, the temperature of each side of the winding is absorbed in a balanced way, the phenomenon of cooling and heating at the same time is avoided, the heat radiation efficiency and the balance are improved, and the energy-saving and safe operation of the transformer is effectively ensured.
As shown in fig. 1 and 6, in some embodiments, the top radiator 6 is disposed in a horizontal plane right above the main tank 1 and has a closed ring structure, each of the inner circulation pipes 4 is connected to the bottom inside of the top radiator 6, each of the outer circulation pipes 5 is connected to the bottom outside of the top radiator 6, in practice, the inner circulation pipe 4 is connected to the bottom inside of the top radiator 6, the outer circulation pipes 5 are connected to the bottom outside of the top radiator 6, and cooling water of each of the outer circulation pipes 5 is collected and mixed inside the top radiator 6 and supplied to each of the inner circulation pipes 4, which can expand the surface area of the top radiator 6 and can accommodate the structural layout in which the connection terminals 31 protrude from the middle of the top radiator 6. The heat conduction performance of the bottom material of the top radiator 6 is lower than that of the surfaces in other directions, and the heat dissipation of the top radiator 6 from the bottom to the outside is reduced, so that the heat conduction to the air near the main box 1 is avoided, and the heat dissipation from the main box 1 to the outside air is facilitated. In the embodiment, the top radiator 6 is spaced from the top of the main tank 1, the connection terminals 31 connected with the transformer windings 3 extend outwards from the center of the annular structure of the top radiator 6, the main tank 1 is provided with the sheet-shaped heat dissipation fins 11, and the oil storage tank 2 is arranged outside the annular structure of the top radiator 6.
As shown in fig. 8 and 9, further, in some embodiments, an annular core tube 61 consistent with the trend of the top radiator 6 is disposed in the top radiator 6, the annular core tube 61 is centrally disposed in a radial section of the top radiator 6, a first end of the main tank 1 is connected with a first end of the annular core tube 61 through a first communication 64, a second end of the main tank is connected with a second end of the annular core tube 61 through a second communication 65, and this structure realizes the filling of the transformer oil in the main tank and the annular core tube, and the annular core tube is disposed in the top radiator, so as to enlarge the contact area between the transformer oil and the outside, improve the heat dissipation efficiency, and provide a temperature condition for the energy-saving operation of the transformer.
As shown in fig. 5 and 8, further, in some embodiments, the first communication pipe 64 and/or the second communication pipe 65 is provided with an oil circulation driving pump 63, and the oil circulation driving pump 63 drives the transformer oil between the main tank 1 and the annular core pipe 61 to circulate so as to drive the transformer oil of the main tank 1 to flow toward the first end of the annular core pipe 61 through the first communication pipe 64, flow toward the second end of the annular core pipe 62 from the first end of the annular core pipe 61, and flow toward the main tank 1 from the second end of the annular core pipe 62 through the second communication pipe 64. The oil circulation driving pump drives the transformer oil to dynamically circulate in the main tank 1 and the annular core pipe 61, meanwhile, the water circulation driving mechanism drives the cooling water to dynamically circulate outside the annular core pipe 61 on the top radiator 6, and the oil circulation flow and the cooling water circulation flow are simultaneously carried out, so that the heat dissipation balance and the heat dissipation cooling effect are improved, and a temperature condition is created for the energy-saving and stable operation of the transformer.
As shown in fig. 6, 8 and 9, further, in some embodiments, a plurality of heat dissipation guide plates 62 extending outwards are arranged on the outer peripheral array of the annular core tube 61, the outer ends of the heat dissipation guide plates 62 extend out of the top radiator 6, the heat dissipation guide plates 62 are obliquely arranged and have different angles, in embodiments, the heat dissipation guide plates are metal conductors with good heat conductivity and are made of copper, aluminum or alloy, and through the arrangement 62 of the heat dissipation guide plates, heat dissipation between the annular core tube 61 and cooling water in the outer top radiator 6 and heat dissipation between the annular core tube and air outside the top radiator 6 can be enhanced, so that heat of transformer oil can be dissipated to the cooling water and external air simultaneously, and heat dissipation efficiency of the transformer oil is improved.
As shown in fig. 10 and 11, in some embodiments, the bottom radiator 7 is divided into a central cavity 71 and an outer cavity 72 by an annular heat dissipation partition 77, the bottom radiator adopts a metal structure with good heat conductivity, the outer cavity 72 surrounds the central cavity 71, the lower end of each inner circulation pipe 4 is connected with the central cavity 71, each outer circulation pipe 5 is connected with the outer cavity 72, and the annular heat dissipation partition 77 is provided with an inner connection through hole 73 for communicating the central cavity 71 with the outer cavity 72. Further, in some preferred embodiments, a water circulation driving mechanism is provided in the central cavity 71 to drive the cooling water to flow from the central cavity 71 to the outer cavity 72, so as to drive the cooling water to flow from the inner circulation pipe 4 downward through the bottom radiator 7 to the outer circulation pipe 5 and from the outer circulation pipe 5 upward through the top radiator 6 to the inner circulation pipe 5. The separation of the inner circulating pipe 4 and the outer circulating pipe 5 is realized through the annular heat dissipation partition 7, the mixing of cooling water between the inner circulating pipe 4 and the outer circulating pipe 5 is realized, and the cooling water is driven to be conveyed from the inner circulating pipe 4 to the outer circulating pipe 5 through the water circulation driving mechanism, so that the dynamic circulation heat dissipation of the cooling water is provided.
Further, in some embodiments, a plurality of concentric annular heat dissipation baffles 77 are disposed in the bottom heat sink 7, the annular heat dissipation baffles 77 divide the outer cavity 72 into a plurality of layers of outer cavities 72 surrounding the central cavity 71, the outer circulation pipes 5 are respectively connected to each of the outer cavities 72, and each layer of annular heat dissipation baffles 77 is provided with an inner connection hole 73 for connecting adjacent outer cavities 72. In practice, each annular heat dissipation plate 77 is made of a metal material with good heat conductivity, and heat of the cooling water can reach the surface of the bottom radiator rapidly and sufficiently through heat conduction of the annular heat dissipation plates 77 in multiple layers, so that heat can be dissipated into the air sufficiently.
As shown in fig. 10 and 11, further, in a preferred embodiment, the central cavity 71 is partitioned into an upper cavity 711 and a lower cavity 712 by a lateral partition 78 provided with a central through hole, each of the inner circulation pipes 4 communicates with the upper cavity 711, and the water circulation driving mechanism includes a water circulation impeller 74 provided in the lower cavity 712. Through the rotation of the water circulation impeller, centrifugal effect is generated on the cooling water in the central cavity 71, the cooling water is driven to be sucked by the central hole and output outwards through the internal connection through holes 73, the flow of the cooling water from the internal circulation pipe to the external circulation pipe is realized, the water circulation of the whole water cooling loop is realized, the full mixing of the cooling water flowing out of the internal circulation pipe is enhanced, and the cooling water is radiated outwards through the annular radiating partition plate 77.
As shown in fig. 10 and 11, further, the lower end of the annular heat dissipation partition plate extends out of the casing of the bottom radiator 7, an external communication hole 75 is provided at the part of the annular heat dissipation partition plate located outside the casing, an air circulation impeller 76 for driving air to flow is provided at the bottom center of the annular heat dissipation partition plate 77, and a driving motor 79 is provided below the bottom radiator 7 and is in driving connection with the air circulation impeller 76 and the water circulation impeller 74. The double heat dissipation process of water cooling circulation heat dissipation and air cooling heat dissipation is realized, and the heat dissipation effect is improved.
Based on the embodiments, the power transformer with the energy-saving function provided by the invention has the advantages that the cooling water circularly flowing out of the inner circulating pipe jointly radiates heat to the air through the bottom radiator, the outer circulating pipe and the top radiator, so that the heat radiation sufficiency under the short-path condition is improved, the heat of the transformer oil near the transformer winding is directly absorbed through the inner circulating pipe passing through the gap between the transformer winding and the main tank, the direct cooling of the transformer oil is realized, the heat conduction and the heat radiation through the transformer tank are not needed, and the heat radiation path is simplified; the inner circulation pipes are arranged on the periphery of the transformer winding in an array mode, the inner circulation pipes absorb heat of transformer oil respectively, the inner radiator and the outer radiator are mixed respectively, the temperature of each side of the winding is absorbed in a balanced mode, the phenomena of external cold and internal heat and cold and heat at the same time are avoided, and energy saving and safe operation of the transformer are effectively guaranteed.
The present invention is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present invention are intended to be included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The utility model provides a power transformer with energy-conserving function installs transformer winding (3) and packs and have transformer oil in main tank (1), and oil storage tank (2) are connected its characterized in that with main tank (1):
the power transformer is provided with a water-cooling circulation loop, including:
an array of internal circulation pipes (4) arranged in a gap between the transformer winding (3) and the main tank (1), each internal circulation pipe (4) extending vertically and having upper and lower ends extending from the main tank (1);
the outer circulation pipes (5) are arranged outside the main tank (1) in an array manner and extend vertically;
a top radiator (6) arranged above the main tank (1), the upper ends of the inner circulation pipe (4) and the outer circulation pipe (5) being connected with the top radiator (6);
the bottom radiator (7) is arranged below the main box (1), the lower ends of the inner circulating pipes (4) and the outer circulating pipes (5) are connected with the bottom radiator (7), and a water circulation driving mechanism for driving cooling water to flow from the inner circulating pipes (4) to the outer circulating pipes (5) is arranged in the bottom radiator (7);
the inner circulation pipe (4), the top radiator (6), the outer circulation pipe (5) and the bottom radiator (7) are connected to form the water cooling circulation loop, and cooling water is filled in the water cooling circulation loop.
2. The power transformer with energy saving function according to claim 1, characterized in that: the top radiator (6) is arranged in a horizontal plane right above the main tank (1) and is of a closed annular structure, each inner circulating pipe (4) is connected with the inner side of the bottom of the top radiator (6), each outer circulating pipe (5) is connected with the outer side of the bottom of the top radiator (6), and the heat conduction performance of the bottom material of the top radiator (6) is lower than that of the surfaces in other directions.
3. The power transformer with energy saving function according to claim 2, characterized in that: an annular core tube (61) which is consistent with the trend of the top radiator (6) is arranged in the top radiator (6), the annular core tube (61) is arranged in the radial section of the top radiator (6) in the middle, the first end of the main tank (1) is connected with the first end of the annular core tube (61) through a first communicating tube (64), and the second end of the main tank is connected with the second end of the annular core tube (61) through a second communicating tube (65).
4. A power transformer with energy saving function according to claim 2 or 3, characterized in that: the first communicating pipe (64) and/or the second communicating pipe (65) are/is provided with an oil circulation driving pump (63) so as to drive transformer oil of the main tank (1) to flow to the first end of the annular core pipe (61) through the first communicating pipe (64), flow from the first end of the annular core pipe (61) to the second end of the annular core pipe (62), and flow from the second end of the annular core pipe (62) to the main tank (1) through the second communicating pipe (64).
5. The power transformer with energy saving function according to claim 1, characterized in that: the bottom radiator (7) is divided into a central cavity (71) and an outer cavity (72) through an annular heat dissipation baffle (77), the outer cavity (72) surrounds outside the central cavity (71), the lower end of each inner circulation pipe (4) is connected with the central cavity (71), each outer circulation pipe (5) is connected with the outer cavity (72), and the annular heat dissipation baffle (77) is provided with an inner connection through hole (73) for communicating the central cavity (71) with the outer cavity (72).
6. The power transformer with energy saving function according to claim 5, characterized in that: a water circulation driving mechanism for driving cooling water to flow from the central cavity (71) to the outer cavity (72) is arranged in the central cavity (71) so as to drive the cooling water to flow from the inner circulation pipe (4) downwards through the bottom radiator (7) to the outer circulation pipe (5) and from the outer circulation pipe (5) upwards through the top radiator (6) to the inner circulation pipe (5).
7. The power transformer with energy saving function according to claim 6, characterized in that: the bottom radiator (7) is internally provided with a plurality of layers of annular heat dissipation partition plates (77) which are concentrically arranged, the annular heat dissipation partition plates (77) divide an outer cavity (72) into a plurality of layers of outer cavities (72) which encircle the outside of the central cavity (71), the outer circulation pipes (5) are respectively connected with the outer cavities (72), and each layer of annular heat dissipation partition plates (77) is provided with an inner connection through hole (73) which is communicated with the adjacent outer cavities (72).
8. The power transformer with energy saving function according to claim 7, characterized in that: the central cavity (71) is divided into an upper cavity (711) and a lower cavity (712) by a transverse partition plate (78) provided with a central through hole, each inner circulating pipe (4) is communicated with the upper cavity (711), and the water circulation driving mechanism comprises a water circulation impeller (74) arranged in the lower cavity (712).
9. The power transformer with energy saving function according to claim 8, characterized in that: the lower extreme of cyclic annular heat dissipation baffle (77) stretches out outside the casing of bottom radiator (7), the part that cyclic annular heat dissipation baffle (77) are located outside the casing is provided with outer intercommunicating pore (75), the bottom center of cyclic annular heat dissipation baffle (77) is provided with air circulation impeller (76) that drive air flows, and driving motor (79) set up in bottom radiator (7) below and with air circulation impeller (76) and hydrologic cycle impeller (74) drive connection.
10. The power transformer with energy saving function according to claim 6 or 7 or 8 or 9, characterized in that: the top radiator (6) is arranged at intervals with the top of the main tank (1), a connecting terminal (31) connected with the transformer winding (3) extends outwards from the center of the annular structure of the top radiator (6), a sheet radiating fin (11) is arranged outside the main tank (1), and the oil storage tank (2) is arranged outside the annular structure of the top radiator (6).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311539014.6A CN117316593B (en) | 2023-11-17 | 2023-11-17 | Power transformer with energy-saving function |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311539014.6A CN117316593B (en) | 2023-11-17 | 2023-11-17 | Power transformer with energy-saving function |
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| CN117316593B CN117316593B (en) | 2024-03-19 |
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| Application Number | Title | Priority Date | Filing Date |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB306039A (en) * | 1928-02-14 | 1930-01-30 | Ass Elect Ind | Improvements in or relating to electrical transformer cooling tanks |
| US20170094836A1 (en) * | 2015-09-30 | 2017-03-30 | Delphi Technologies, Inc. | Double-sided heat exchanger for fluid-cooled electronics with a flat coplanar series-wise coolant flow path |
| CN113488316A (en) * | 2021-09-08 | 2021-10-08 | 江苏天瑞变压器有限公司 | Large-capacity rectifier transformer cooled by finned radiator |
| CN215868914U (en) * | 2021-08-02 | 2022-02-18 | 四川弗莱特电力设备有限公司 | Oil-saving oil-immersed transformer |
| CN116417220A (en) * | 2023-04-17 | 2023-07-11 | 华夏恒业智能电气有限公司 | Oil immersed transformer |
-
2023
- 2023-11-17 CN CN202311539014.6A patent/CN117316593B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB306039A (en) * | 1928-02-14 | 1930-01-30 | Ass Elect Ind | Improvements in or relating to electrical transformer cooling tanks |
| US20170094836A1 (en) * | 2015-09-30 | 2017-03-30 | Delphi Technologies, Inc. | Double-sided heat exchanger for fluid-cooled electronics with a flat coplanar series-wise coolant flow path |
| CN215868914U (en) * | 2021-08-02 | 2022-02-18 | 四川弗莱特电力设备有限公司 | Oil-saving oil-immersed transformer |
| CN113488316A (en) * | 2021-09-08 | 2021-10-08 | 江苏天瑞变压器有限公司 | Large-capacity rectifier transformer cooled by finned radiator |
| CN116417220A (en) * | 2023-04-17 | 2023-07-11 | 华夏恒业智能电气有限公司 | Oil immersed transformer |
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| CN117316593B (en) | 2024-03-19 |
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