CN115440468B - Radiator for power transformer, combined radiating device and power transformer - Google Patents
Radiator for power transformer, combined radiating device and power transformerInfo
- Publication number
- CN115440468B CN115440468B CN202211200181.3A CN202211200181A CN115440468B CN 115440468 B CN115440468 B CN 115440468B CN 202211200181 A CN202211200181 A CN 202211200181A CN 115440468 B CN115440468 B CN 115440468B
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- China
- Prior art keywords
- heat sink
- fins
- fin
- radiator
- heat
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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
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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
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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
- H01F27/12—Oil cooling
- H01F27/14—Expansion chambers; Oil conservators; Gas cushions; Arrangements for purifying, drying, or filling
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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
- H01F27/22—Cooling by heat conduction through solid or powdered fillings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F29/00—Variable transformers or inductances not covered by group H01F21/00
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
本发明提供了用于电力变压器的散热器、组合的散热装置和电力变压器。散热器包括散热片组、风机、进油管和出油管，散热片组包括多个散热片，每个散热片包括内壁、外壁、散热片空腔，从而形成冷却液路径，以使来自变压器油箱的热的冷却液通过与散热片的内壁和外壁的接触将所携带的热量向周围空气传递；每个散热片包括弧形段，多个散热片套设在一起，多个散热片包括外层散热片，内层散热片以及中间散热片，风机安装于散热片组的一侧上，以形成空气路径，冷却液路径与空气路径之间相互隔离，通过散热片的内壁和外壁传递的来自热的冷却液的热量通过空气而传递到外界环境中。本发明的散热器将风机的出风量限制在散热器内，显著提高冷却效果。
The present invention provides a radiator for a power transformer, a combined heat dissipation device, and a power transformer. The radiator includes a fin group, a fan, an oil inlet pipe, and an oil outlet pipe. The fin group includes multiple fins, each of which includes an inner wall, an outer wall, and a fin cavity, thereby forming a coolant path. The hot coolant from the transformer oil tank transfers the heat it carries to the surrounding air through contact with the inner and outer walls of the fins. Each fin includes an arc segment. The multiple fins are nested together. The multiple fins include outer fins, inner fins, and intermediate fins. The fan is installed on one side of the fin group to form an air path. The coolant path is isolated from the air path. The heat from the hot coolant transferred through the inner and outer walls of the fins is transferred to the external environment through the air. The radiator of the present invention limits the air output of the fan to within the radiator, significantly improving the cooling effect.
Description
Technical Field
The present invention relates to the field of heat sinks, and in particular, to a heat sink for a power transformer, a combined heat sink and a power transformer.
Background
The radiator structure of the traditional transformer is formed by combining a plurality of groups of radiating fins and a fan, wherein each radiating fin group consists of a plurality of radiating fins which are distributed at equal intervals. Because the air outlet of the fan has obvious rotation phenomenon, more air quantity leakage can occur at the outer side of the radiating fin group, and the cooling effect of the transformer is seriously affected.
At present, by combining and arranging a plurality of radiating fin groups, the air quantity leaked obliquely among the radiating fin groups can be effectively utilized. But a large leakage air volume still occurs outside the fin group. In addition, by adding a coaming plate on the outer side of the radiator, part of air quantity leakage can be blocked, but because the wind resistance of a channel formed by the coaming plate is smaller than that of the radiating fin group, the leaked wind can be blocked from overflowing from the top of the coaming plate, and the leaked wind cannot return to the radiating fin group for cooling.
Disclosure of Invention
In view of this, the present invention aims to provide a radiator for a power transformer capable of improving a cooling effect and avoiding leakage of an air volume.
According to an aspect of the present invention, there is provided a radiator for a power transformer comprising a core, windings surrounding the core, and a transformer tank containing a cooling liquid for cooling the core and the windings, the transformer tank comprising an oil outlet for discharging hot cooling liquid and an oil inlet for introducing cold cooling liquid, the radiator comprising a fin group, a fan, an oil inlet pipe and an oil outlet pipe, the oil inlet pipe being in communication with the oil outlet of the transformer tank and the oil outlet pipe being in communication with the oil inlet of the transformer tank,
Wherein the heat sink group comprises a plurality of first heat sinks, each of the plurality of first heat sinks comprising an inner wall, an outer wall, a heat sink cavity defined between the inner wall and the outer wall, a heat sink inlet in communication with the heat sink cavity and a heat sink outlet in communication with the heat sink cavity, the heat sink inlet in communication with the oil inlet pipe and the heat sink outlet in communication with the oil outlet pipe, thereby forming a coolant path from the oil outlet of the transformer tank, through the oil inlet pipe, through the heat sink inlet, through the heat sink cavity, through the heat sink outlet to the oil inlet of the transformer tank such that hot coolant from the transformer tank transfers carried heat to ambient air through contact with the inner wall and the outer wall of the plurality of first heat sinks;
Wherein each of the plurality of first fins extends in an axial direction, and a cross section of each first fin perpendicular to the axial direction includes an arc-shaped section, and inner diameters of the arc-shaped sections of each first fin are different from each other, the plurality of first fins are sleeved together in a concentric arrangement with each other and the arc-shaped sections of the plurality of first fins are located in the same angular region in a circumferential direction, the plurality of first fins include an outer layer fin located at an outermost side, an inner layer fin located at an innermost side, and a plurality of intermediate fins located between the outer layer fin and the inner layer fin,
Wherein, the air outlet of the fan is arranged on one side of the radiating fin group along the axial direction, and the other side of the radiating fin group along the axial direction is communicated with the external environment;
Wherein a first air passage along the axial direction is formed between the outer layer fin, the intermediate fin, and the inner layer fin to form an air path from the air outlet of the blower fan through the first air passage to an external environment, the coolant path and the air path are isolated from each other, and heat from the hot coolant transferred through the inner walls and the outer walls of the plurality of first fins is transferred to the external environment through air flowing through the air path.
In an exemplary embodiment, one or more of the plurality of intermediate fins has openings therethrough such that the plurality of first fins are in communication with each other in a radial direction perpendicular to the axial direction, thereby forming a second air passage for ventilation in the radial direction to guide air flowing on the first air passage in the axial direction to flow in the radial direction.
In an exemplary embodiment, each of the plurality of intermediate fins has the opening, the opening of one of the plurality of intermediate fins and the opening of an adjacent intermediate fin adjacent to the intermediate fin being located in different angular regions in a circumferential direction to direct air flowing in a region between two adjacent first fins having a relatively higher temperature after flowing a distance in the radial direction through the respective opening into a region between two adjacent first fins having a relatively lower temperature.
In an exemplary embodiment, each of the plurality of intermediate fins has at least two of the openings, and each of the at least two openings has a rectangular parallelepiped shape in outline.
In an exemplary embodiment, when the axial direction of the fin group is in a vertical direction, the oil inlet pipe is located at an upper end of the fin group, and the oil outlet pipe is located at a lower end of the fin group;
wherein the upper end of the fin group is formed with a first groove for receiving the oil inlet pipe, the first groove including a first recess formed at the upper end of each of the plurality of first fins;
and wherein a second groove for receiving the oil outlet pipe is formed at a lower end of the fin group, the second groove including a second concave portion formed at a lower end of each of the plurality of first fins.
In an exemplary embodiment, each of the outer fins and the intermediate fins is hollow cylindrical in shape.
In an exemplary embodiment, the inner layer fin includes first and second fins opposite to each other, the first and second fins each have a circular arc shape in cross section, and first and second spacing spaces exist between the first and second fins.
According to another aspect of the present invention, there is provided a combined heat sink comprising a first heat sink module comprising at least one first heat sink and at least one second heat sink, the first heat sink being a heat sink for a power transformer according to any one of the aspects of the present invention, the second heat sink comprising a plurality of planar shaped second heat sinks, the second heat sinks being superimposed together to form a heat sink in the form of a cuboid.
In an exemplary embodiment, the at least one first heat sink comprises two first heat sinks, the two first heat sinks and the at least one second heat sink are arranged in succession in a row of heat sinks, one of the two first heat sinks is located at one end of the row of heat sinks and the other of the two first heat sinks is located at the other end of the row of heat sinks, and the cross section of each first heat sink of each of the two first heat sinks comprises a semicircular section.
In an exemplary embodiment, the cross section of each first fin of each of the two first heat sinks further includes a straight line section extending from both ends of the semicircular section.
In an exemplary embodiment, the at least one second heat sink further includes one or more fans mounted on one side of the second heat sink, the fans of the second heat sink being at the same level as the fans of the first heat sink.
In an exemplary embodiment, the combined heat sink further comprises a second heat sink module having the same structure as the first heat sink module, the first heat sink module and the second heat sink module being arranged side by side, the first heat sink module and the second heat sink module sharing one delivery oil header and one drain oil header, an input port of the delivery oil header being in communication with the oil outlet of the transformer tank and an output port of the delivery oil header being in communication with an oil inlet pipe of the first heat sink and an oil inlet pipe of the second heat sink;
And the delivery header is located in a position intermediate the first radiator module and the second radiator module, and the discharge header is located in a position intermediate the first radiator module and the second radiator module.
According to another aspect of the invention there is provided a power transformer comprising a core, windings surrounding the core and a transformer tank containing a cooling liquid for cooling the core and windings, the transformer tank comprising an oil outlet for discharging hot cooling liquid and an oil inlet for introducing cold cooling liquid, the power transformer further comprising one or more heat sinks for a power transformer according to any of the above aspects of the invention, or the power transformer further comprising one or more heat sinks according to a combination of any of the above aspects of the invention.
By means of the radiator for a power transformer, the combined heat dissipating device and the power transformer according to the invention, at least the following technical advantages are achieved.
In the first aspect of the invention, since the cross section of each first radiating fin perpendicular to the axial direction comprises an arc-shaped section, the outer layer radiating fins form a radiator outer contour sealed in the circumferential direction, and since air flowing between layers of the radiator can be well limited in the radiator outer contour sealed in the circumferential direction, leakage of cooling air quantity of the radiator for the power transformer can be reduced, and the cooling structure is more reasonable.
In the second aspect of the present invention, since the intermediate fin has the opening passing therethrough, the air flowing on the first air passage along the axial direction can be guided to flow in the radial direction, and therefore, the present invention can significantly improve the cooling efficiency of the radiator for the power transformer, effectively reduce the temperature rise of the transformer, and thereby improve the performance of the transformer.
Thirdly, the invention can realize higher cooling performance of the radiator for the power transformer, and can reduce the cooling area of the radiator or the number of fans, thereby saving space and effectively reducing the cost of the transformer.
Drawings
The above and other features and advantages of the present invention will become more apparent to those of ordinary skill in the art by describing in detail preferred embodiments thereof with reference to the attached drawings in which:
Fig. 1 is a perspective view of a heat sink for a power transformer according to an exemplary embodiment of the present invention.
Fig. 2 is another perspective view of a heat sink for a power transformer according to an exemplary embodiment of the present invention.
Fig. 3 is a schematic bottom view of a heat sink for a power transformer according to an exemplary embodiment of the present invention.
Fig. 4 is a perspective view of a fin group of a radiator for a power transformer according to an exemplary embodiment of the present invention.
Fig. 5 is another perspective view of a heat sink assembly for a heat sink of a power transformer according to an exemplary embodiment of the present invention, wherein an outer layer heat sink is omitted for clarity.
Fig. 6 is a perspective view of a combined heat sink according to an exemplary embodiment of the present invention.
Fig. 7 is another perspective view of a combined heat sink according to an exemplary embodiment of the present invention.
Fig. 8 is a schematic front view of a combined heat sink according to an exemplary embodiment of the present invention.
Fig. 9 is a schematic side view of a combined heat sink according to an exemplary embodiment of the invention.
Fig. 10 is yet another perspective view of the combined heat sink according to an exemplary embodiment of the present invention, the perspective view being from above the combined heat sink.
Fig. 11 is yet another perspective view of a combined heat sink according to an exemplary embodiment of the present invention, the perspective view being from an angle below the combined heat sink.
Wherein, the reference numerals are as follows:
10. Radiating fin group
100. First radiator
101. Outer layer radiating fin
102. Intermediate radiating fin
103. Inner layer radiating fin
1031. First sheet
1032. Second sheet
20. Oil inlet pipe
30. Oil outlet pipe
40. Blower fan
50. Conveying oil collecting pipe
60. Discharge oil collecting pipe
70. Mounting frame
80. Support member
81. Support rib
104. An opening
105. A first concave part
106. Second concave part
200. Second radiator
Detailed Description
The present invention will be further described in detail with reference to the following examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is intended to include the plural unless the context clearly indicates otherwise.
Referring first to fig. 1 and 2, perspective views of a heat sink for a power transformer according to an exemplary embodiment of the present invention are shown from different angles. Not shown in fig. 1 and 2 is a power transformer comprising a core, windings surrounding the core, and a transformer tank containing a cooling liquid for cooling the core and windings, the transformer tank comprising an oil outlet for discharging hot cooling liquid and an oil inlet for introducing cold cooling liquid, as is known. The heat sink of the present invention may be disposed in a surrounding space of the power transformer, such as above or sideways, etc., as desired.
Referring to fig. 1, the radiator includes a fin group 10, a fan 40, an oil inlet pipe 20 and an oil outlet pipe 30, the oil inlet pipe 20 being for communicating with an oil outlet of a transformer oil tank to receive hot coolant from the transformer oil tank, and the oil outlet pipe 30 being for communicating with an oil inlet of the transformer oil tank to deliver cooled cold coolant back to the transformer oil tank, thereby forming a circulation loop of the coolant. When the axial direction of the fin group 10 is in the vertical direction, the oil inlet pipe 20 is located at the upper end of the fin group 10, and the oil outlet pipe 30 is located at the lower end of the fin group 10,
Referring to fig. 2, the fin pack 10 includes a plurality of first fins, each of the plurality of first fins including an inner wall, an outer wall, a fin cavity (not shown) defined between the inner wall and the outer wall, a fin inlet (not shown) in communication with the fin cavity, and a fin outlet (not shown) in communication with the fin cavity, the fin inlet in communication with the oil inlet pipe 20, the fin outlet in communication with the oil outlet pipe 30, thereby forming a coolant path from the oil outlet of the transformer tank, through the oil inlet pipe 20, through the fin inlet, through the fin cavity, through the fin outlet to the oil inlet of the transformer tank, such that hot coolant from the transformer tank transfers carried heat to ambient air through contact with the inner wall and the outer wall of the plurality of first fins. Although the structure of the fin cavity, the fin inlet and the fin outlet of each fin is not shown in the drawings, the specific structure of each fin can be easily understood and implemented by those skilled in the art.
Referring to fig. 2, each of the plurality of first fins extends in an axial direction (i.e., a vertical direction in fig. 2), and a cross section perpendicular to the axial direction of each of the first fins includes an arc-shaped section (particularly, a circular shape in the example of fig. 2), and inner diameters of the arc-shaped sections of each of the first fins are different from each other, the plurality of first fins are sleeved together in a concentric arrangement with each other, and the arc-shaped sections of the plurality of first fins are located in the same angular region in the circumferential direction. The plurality of first fins includes an outer layer fin 101 located at the outermost side, an inner layer fin 103 located at the innermost side, and a plurality of intermediate fins 102 located between the outer layer fin 101 and the inner layer fin 103. The plurality of first fins may have the same length in the axial direction. Since the cross section of each first fin perpendicular to the axial direction includes an arc-shaped section, a circumferentially closed radiator outer contour is formed by the outer layer fins 101, and since air flowing between the first fins of the fin group 10 can be well confined within the circumferentially closed radiator outer contour, leakage of cooling air volume of the radiator for the power transformer can be reduced, so that the cooling structure is more reasonable.
Referring to fig. 2, an air outlet of the blower 40 is installed on one side of the fin group 10 in the axial direction, and the other side of the fin group 10 in the axial direction communicates with the external environment. The outer layer heat sink 101, the middle heat sink 102 and the inner layer heat sink 103 form a first air passage therebetween along an axial direction to form an air path from the air outlet of the blower fan 40 through the first air passage to the external environment, the cooling liquid path and the air path are isolated from each other, and heat from the hot cooling liquid transferred through the inner walls and the outer walls of the plurality of first heat sinks is transferred to the external environment through air flowing through the air path. When the axial direction is in the vertical direction, the blower 40 is located at a position below the fin group 10. Further, the structure of the blower 40 is clearly shown in fig. 3.
Referring to fig. 4 and 5, one or more (preferably each) of the plurality of intermediate fins 102 includes an opening 104 therethrough that forms an air passage so as to be in communication with each other in a radial direction perpendicular to the axial direction between the plurality of first fins, thereby forming a second air passage for air circulation in the radial direction to guide air flowing in the first air passage along the axial direction to flow in the radial direction.
Referring to fig. 4 and 5, each of the plurality of intermediate fins 102 has an opening 104, and the opening of one intermediate fin of the plurality of intermediate fins 102 and the opening of an adjacent intermediate fin adjacent to the intermediate fin are located in different angular regions in the circumferential direction to guide air flowing in a region between two adjacent first fins having a relatively higher temperature to flow a distance in the radial direction and then pass through the corresponding opening 104 into the region between two adjacent first fins having a relatively lower temperature. In other words, by this arrangement, the openings of the intermediate fins are not directly faced with the openings of the adjacent intermediate fins, whereby air from the openings of the intermediate fins cannot directly flow into the openings of the adjacent intermediate fins, i.e., the openings of the fins of the respective layers are staggered, avoiding direct penetration.
Referring to fig. 4 and 5, each of the plurality of intermediate fins 102 includes at least two openings 104, and the at least two openings 104 may be uniformly distributed along the circumferential direction of the intermediate fin, and the outline of each of the at least two openings 104 may be rectangular parallelepiped. Specifically, each of the plurality of intermediate fins 102 has two openings that are spaced 180 degrees apart in the circumferential direction. Of course, each of the plurality of intermediate fins 102 may include more than three openings, which may be equidistantly disposed.
It is clearly shown in fig. 5 that the shape of each opening 104 is rectangular parallelepiped and is located substantially at the intermediate position of each intermediate fin 102 in the axial direction, and the extension length of the opening 104 in the axial direction may be one-half to three-fourths, for example, two-thirds of the length of the intermediate fin 102 in the axial direction. Of course, it will be appreciated that the shape and size of each opening may be adapted to the particular situation. For example, the outer contour of the opening may be oval or the like. In addition, the distribution of the openings over the respective intermediate fins 102 may also be appropriately adjusted.
Referring to fig. 4 and 5, the fin group 10 is formed at an upper end thereof with a first groove for receiving the oil inlet pipe 20, the first groove including a first recess 105 formed at an upper end of each of the plurality of first fins, and the fin group 10 is formed at a lower end thereof with a second groove for receiving the oil outlet pipe 30, the second groove including a second recess 106 (refer to fig. 5) formed at a lower end of each of the plurality of first fins.
Referring to fig. 2 and 4, each of the outer fins 101 and the intermediate fins 102 is a hollow cylindrical shape. Referring to fig. 4, the inner layer heat sink 103 includes first and second sheets 1031 and 1032 opposite to each other, the cross section of the first sheet 1031 and the cross section of the second sheet 1032 are circular arcs, and first and second spacing spaces exist between the first and second sheets 1031 and 1032.
Referring to fig. 6 to 11, a combined heat sink according to an exemplary embodiment of the present invention is shown at various angles. The combined heat sink includes a first heat sink module and a second heat sink module, which may be substantially identical in structure to the first heat sink module. The first radiator module is arranged side by side with the second radiator module, which share one delivery header 50 and one discharge header 60.
Referring to fig. 10, an input port of the delivery header pipe 50 is for communication with an oil outlet of the transformer tank, and an output port of the delivery header pipe 50 is for communication with an oil inlet pipe 20 of the first radiator and an oil inlet pipe of the second radiator.
Referring to fig. 11, the input port of the drain header 60 is for communication with the oil outlet pipe 30 of the first radiator and the oil outlet pipe of the second radiator, and the output port of the drain header 60 is for communication with the oil inlet of the transformer tank. The delivery header pipe 50 is located in a position intermediate the first radiator module and the second radiator module, and the discharge header pipe 60 is located in a position intermediate the first radiator module and the second radiator module.
Since the structure of the second radiator module is substantially the same as that of the first radiator module, the description will be mainly made below with respect to the structure of the first radiator module. Of course, it is understood that the structure of the second radiator module may also be different from the structure of the first radiator module.
The first radiator module comprises at least one first radiator 100 and at least one second radiator 200, the first radiator 100 being similar to the radiator described with reference to fig. 1 to 5, but differing therefrom, as will be elucidated hereinafter, as will also be apparent from the accompanying drawings. The second heat sink 200 includes a plurality of flat-plate-shaped second heat sinks which may be arranged at equal intervals and stacked together to constitute a heat sink in the form of a rectangular parallelepiped.
Referring to fig. 6, the at least one first heat sink 100 may include two first heat sinks 100, and the two first heat sinks 100 and the plurality of second heat sinks 200 are successively arranged in a row of heat sinks. Referring to fig. 7, one of the two first heat sinks 100 is located at one end of a row of heat sinks, and the other of the two first heat sinks 100 is located at the other end of a row of heat sinks, and each of the heat sinks of each of the two first heat sinks 100 includes a semicircular section in cross section. Further, referring to fig. 6, it can be seen that the cross section of each fin of each of the two first radiators 100 may further include straight line sections extending from both ends of the semicircular section, the length of the two straight line sections in the axial direction along the transfer header pipe 50 being about one half of the length of the single second radiator 200 in the axial direction along the transfer header pipe 50. That is, each fin of each of the two first heat sinks 100 includes both a half hollow cylindrical portion and a flat plate-shaped portion. Of course, in different embodiments, the shape of the first heat sink 100 may comprise only half of a hollow cylindrical portion, or may comprise the entire hollow cylindrical portion, i.e. comprise the first heat sink as shown in fig. 1-5, depending on different requirements.
Referring to fig. 7, the plurality of second heat sinks 200 further include fans mounted on one side of the plurality of flat plate-shaped heat sinks, the fans of the second heat sinks 200 being at the same level as the fans 40 of the first heat sinks 100.
Referring to fig. 9, there are one or more supports 80, such as two supports (only one support is visible at the angle in fig. 9), between the transfer header 50 and the discharge header 60, which may be specifically a support tube or other suitable form. In addition, in order to enhance the supporting effect, the side edges of the supporting member 80 may be provided with supporting ribs 81, which may be triangular supporting ribs (a vertical bar from the perspective of fig. 9). Referring to fig. 6, two mounting frames 70 are also shown, two mounting frames 70 may be used to secure and retain the first heat sink module and the first heat sink module.
The invention also provides a power transformer comprising a core, windings surrounding the core and a transformer tank containing a cooling liquid for cooling the core and windings, the transformer tank comprising an oil outlet for discharging hot cooling liquid and an oil inlet for introducing cold cooling liquid, and the power transformer comprising a radiator as described with reference to fig. 1-5 and/or comprising a combined heat sink as described with reference to fig. 6-11, said radiator and/or said combined heat sink may be arranged around the transformer.
The improved radiator or the combined radiating device can limit the air output of the fan in the radiator to effectively cool, so that the cooling effect can be remarkably improved.
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 (12)
1. A radiator for an electrical transformer comprising an iron core, windings surrounding the iron core and a transformer tank containing a cooling liquid for cooling the iron core and the windings, the transformer tank comprising an oil outlet for discharging hot cooling liquid and an oil inlet for introducing cold cooling liquid,
It is characterized in that the radiator comprises a radiating fin group (10), a fan (40), an oil inlet pipe (20) and an oil outlet pipe (30), the oil inlet pipe (20) is communicated with the oil outlet of the transformer oil tank, the oil outlet pipe (30) is communicated with the oil inlet of the transformer oil tank,
Wherein the heat sink group (10) comprises a plurality of first heat sinks, each of the plurality of first heat sinks comprising an inner wall, an outer wall, a heat sink cavity defined between the inner wall and the outer wall, a heat sink inlet in communication with the heat sink cavity and a heat sink outlet in communication with the heat sink cavity, the heat sink inlet in communication with the oil inlet pipe (20), the heat sink outlet in communication with the oil outlet pipe (30) thereby forming a coolant path from the oil outlet of the transformer tank, through the oil inlet pipe (20), through the heat sink inlet, through the heat sink cavity, through the heat sink outlet to the oil inlet of the transformer tank such that hot coolant from the transformer tank transfers carried heat to ambient air through contact with the inner wall and the outer wall of the plurality of first heat sinks;
Wherein each of the plurality of first fins extends in an axial direction, and a cross section of each first fin perpendicular to the axial direction includes an arc-shaped section, and inner diameters of the arc-shaped sections of each first fin are different from each other, the plurality of first fins are sleeved together in a concentric arrangement with each other and the arc-shaped sections of the plurality of first fins are located in the same angular region in a circumferential direction, the plurality of first fins include an outermost outer layer fin (101), an innermost inner layer fin (103), and a plurality of intermediate fins (102) between the outer layer fin (101) and the inner layer fin (103),
Wherein an air outlet of the fan (40) is mounted on one side of the fin group (10) along the axial direction, and the other side of the fin group (10) along the axial direction is communicated with the external environment;
Wherein a first air passage along the axial direction is formed between the outer layer fin (101), the intermediate fin (102) and the inner layer fin (103) to form an air path from the air outlet of the blower fan (40) to the external environment through the first air passage, the coolant path and the air path being isolated from each other, heat from the hot coolant transferred through the inner wall and the outer wall of the plurality of first fins being transferred to the external environment by air flowing through the air path;
Wherein one or more of the plurality of intermediate fins (102) has openings (104) therethrough so as to be in communication with each other in a radial direction perpendicular to the axial direction between the plurality of first fins, thereby forming a second air passage for ventilation in the radial direction to guide air flowing on the first air passage in the axial direction to flow in the radial direction.
2. The radiator for a power transformer according to claim 1, wherein each of the plurality of intermediate fins (102) has the opening (104), the opening of one intermediate fin of the plurality of intermediate fins (102) and the opening of an adjacent intermediate fin adjacent to the intermediate fin being located in different angular regions in a circumferential direction to direct air flowing in a region between two adjacent first fins having a relatively higher temperature to pass through the corresponding opening (104) into a region between two adjacent first fins having a relatively lower temperature after flowing a distance in the radial direction.
3. The heat sink for a power transformer according to claim 2, wherein each of the plurality of intermediate fins (102) has at least two of the openings (104), and each opening (104) of the at least two openings (104) is rectangular parallelepiped in contour.
4. A radiator for a power transformer according to claim 3, characterized in that the oil inlet pipe (20) is located at an upper end of the fin group (10) and the oil outlet pipe (30) is located at a lower end of the fin group (10) when the axial direction of the fin group (10) is in a vertical direction;
Wherein the upper end of the fin group (10) is formed with a first groove for receiving the oil inlet pipe (20), the first groove including a first concave portion (105) formed at the upper end of each of the plurality of first fins;
And wherein a second groove for receiving the oil outlet pipe (30) is formed at a lower end of the fin group (10), the second groove including a second concave portion (106) formed at a lower end of each of the plurality of first fins.
5. The heat sink for a power transformer according to any one of claims 1 to 4, characterized in that each of the outer layer heat sink (101) and the intermediate heat sink (102) is of hollow cylindrical shape.
6. The heat sink for a power transformer according to claim 5, wherein the inner layer heat sink (103) comprises a first sheet (1031) and a second sheet (1032) opposite to each other, the cross section of the first sheet (1031) and the cross section of the second sheet (1032) are both circular arc-shaped, and a first space and a second space exist between the first sheet (1031) and the second sheet (1032).
7. A combined heat sink, characterized in that the combined heat sink comprises a first heat sink module comprising at least one first heat sink (100) and at least one second heat sink (200), the first heat sink (100) being a heat sink for a power transformer according to any one of claims 1 to 4, the second heat sink (200) comprising a plurality of flat plate-shaped second heat sinks, which second heat sinks are superimposed together to form a heat sink in the form of a cuboid.
8. The combined heat sink according to claim 7, wherein the at least one first heat sink (100) comprises two first heat sinks, the two first heat sinks and the at least one second heat sink (200) being arranged in succession in a row of heat sinks, one of the two first heat sinks being located at one end of the row of heat sinks and the other of the two first heat sinks being located at the other end of the row of heat sinks, each first heat sink of the two first heat sinks comprising a semicircular section in cross section.
9. The combined heat sink of claim 8 wherein the cross-section of each first fin of each of the two first heat sinks further comprises a straight section extending from both ends of the semicircular section.
10. The combined heat sink of claim 7, wherein the at least one second heat sink (200) further comprises one or more fans mounted on one side of the second heat sink, the fans of the second heat sink (200) being at the same level as the fans (40) of the first heat sink (100).
11. The combined heat sink according to claim 7, further comprising a second heat sink module having the same structure as the first heat sink module, the first heat sink module being arranged side by side with the second heat sink module, the first heat sink module and the second heat sink module sharing one delivery header (50) and one drain header (60), an input port of the delivery header (50) being in communication with the oil outlet of the transformer tank and an output port of the delivery header (50) being in communication with an oil inlet pipe (20) of the first heat sink and an oil inlet pipe of the second heat sink, an input port of the drain header (60) being in communication with an oil outlet pipe (30) of the first heat sink and an oil outlet pipe of the second heat sink, and an output port of the drain header (60) being in communication with the oil inlet of the transformer tank;
and the delivery header (50) is located in a position intermediate the first radiator module and the second radiator module, and the discharge header (60) is located in a position intermediate the first radiator module and the second radiator module.
12. A power transformer comprising a core, windings around the core and a transformer tank containing a cooling liquid for cooling the core and windings, the transformer tank comprising an oil outlet for discharging hot cooling liquid and an oil inlet for introducing cold cooling liquid, characterized in that the power transformer further comprises one or more heat sinks for a power transformer according to any one of claims 1 to 6, or the power transformer further comprises one or more heat sinks according to any one of claims 7 to 11 in combination.
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| CN202211200181.3A CN115440468B (en) | 2022-09-29 | 2022-09-29 | Radiator for power transformer, combined radiating device and power transformer |
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| CN202211200181.3A CN115440468B (en) | 2022-09-29 | 2022-09-29 | Radiator for power transformer, combined radiating device and power transformer |
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| CN118231096B (en) * | 2024-04-30 | 2025-02-14 | 山东泰开箱变有限公司 | Chip heat dissipation structure of new energy oil-immersed transformer |
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| JP2001091168A (en) * | 1999-09-24 | 2001-04-06 | Calsonic Kansei Corp | Tank for heat exchanger and heat exchanger |
| CN112053838A (en) * | 2019-06-05 | 2020-12-08 | 沈阳天通电气有限公司 | Steel-aluminum support protection type aluminum alloy heat dissipation device for oil-immersed power transformer and manufacturing method |
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| KR20060043876A (en) * | 2004-11-10 | 2006-05-16 | 현대자동차주식회사 | Automotive Evaporator Core with Improved Condensate Drainage |
| TWI279183B (en) * | 2005-08-24 | 2007-04-11 | Delta Electronics Inc | Composite heat dissipating apparatus |
| DE102007033410B4 (en) * | 2007-07-18 | 2018-08-09 | Audi Ag | Intercooler and internal combustion engine |
| DE102010031293A1 (en) * | 2010-07-13 | 2012-01-19 | Osram Gesellschaft mit beschränkter Haftung | Heat sink for a semiconductor lamp and semiconductor lamp |
| EA024963B1 (en) * | 2011-11-22 | 2016-11-30 | Евгений Николаевич Воронов | Cylindrical heat exchanger |
| CN105473501B (en) * | 2013-05-07 | 2019-10-29 | 布鲁斯·黑兹尔坦 | Monolithic heat exchanger, apparatus and process for halosilane hydrogenation |
| US10864575B2 (en) * | 2019-02-25 | 2020-12-15 | Max Ahrens | Radially acting aftercooler for horizontal continuous casting |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001091168A (en) * | 1999-09-24 | 2001-04-06 | Calsonic Kansei Corp | Tank for heat exchanger and heat exchanger |
| CN112053838A (en) * | 2019-06-05 | 2020-12-08 | 沈阳天通电气有限公司 | Steel-aluminum support protection type aluminum alloy heat dissipation device for oil-immersed power transformer and manufacturing method |
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Address after: 510000 No. 26, Jungong Road, East District, Guangzhou Economic and Technological Development Zone, Guangdong Province Applicant after: Guangzhou Siemens Energy Transformer Co.,Ltd. Address before: 510000 No. 26, Jungong Road, East District, Guangzhou Economic and Technological Development Zone, Guangdong Province Applicant before: SIEMENS TRANSFORMER (GUANGZHOU) Co.,Ltd. |
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