Cooling fin assembly for transformer

Abstract

The cooling fin assembly for the transformer comprises a cooling fin, an oil inlet pipe, an oil outlet pipe and a supporting piece, the cooling fin comprises a body, an oil channel, an oil inlet and an oil outlet, staggered groove parts are arranged on the oil channel, and cooling oil enters the cooling fin from the oil inlet, passes through the groove parts on the oil channel and then flows out of the cooling fin from the oil outlet. According to the cooling fin assembly for the transformer, the short flow phenomenon and insufficient utilization of the oil channels are avoided through the oil channels with the single flow direction, and the cooling effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of transformer heat sinks, in particular to a heat sink assembly for a transformer. Background Art

[0002] The heat generated by the loss of the oil-immersed transformer during operation is transferred to the oil tank wall through the heat conduction and convection of the transformer. Since the heat dissipation of air is very poor, the heat dissipation effect of the transformer relying solely on the outer wall of the oil tank is not very good. In order to improve the heat dissipation capacity of the transformer, heat sinks or heat pipes are added to the outer wall of the oil tank.

[0003] The oil channel structure of the heat sink plays an important role in the fluid flow and heat transfer inside the entire heat sink assembly. In this regard, the prior art provides a high-efficiency heat dissipation fin-type radiator for transformers (CN113871151A), which includes a group of heat sinks, each of which is a hollow rectangular plate structure and has an oil circulation chamber formed therein. A first connecting pipe is sleeved on the edge of the top edge of the heat sink body and close to the end of one long side of the heat sink. A second connecting pipe is sleeved on the edge of the bottom edge of the heat sink body and close to the other long side of the heat sink. Adjacent two heat sinks are connected to each other through the first and second connecting pipes, both of which are opened at both ends. The positions of the first and second connecting pipes correspond to the end of the diagonal lines of the end faces of the multiple fins. The outermost heat sinks of the group of multiple fins are connected to the oil inlet and return pipes. The group of heat sinks can dissipate the high-temperature oil introduced by the oil inlet pipe through the first and second connecting pipes and then return it to the oil return pipe. This heat sink has the advantages of large heat dissipation area, improved heat dissipation effect, increased heat exchange efficiency and reduced production cost.

[0004] However, when the oil is distributed to the heat sink through the first and second connecting pipes, the oil often flows in the oil pipes in a short circuit and cannot flow smoothly to the side edge of the oil outlet pipe of the heat sink. This will also make the heat dissipation efficiency of different parts of the heat sink different, resulting in uneven oil flow in the heat sink and poor heat dissipation effect.

[0005] In view of the above situation, it is necessary to optimize the structure of the existing heat sink to solve the problem of uneven heat dissipation effect. To this end, the applicant has made a useful design, and the technical solution to be introduced below is produced in this context. Utility Model Content

[0006] The technical problem to be solved by the utility model is to provide a heat sink assembly for a transformer, wherein the oil channel with a single flow direction avoids short-flow phenomenon and insufficient utilization of the oil channel, thereby improving the heat dissipation effect.

[0007] The technical solution adopted by the utility model to solve its technical problem is: to provide a heat sink assembly for a transformer, including a heat sink, an oil inlet pipe, an oil outlet pipe and a support plate, the heat sink including a body, an oil channel, an oil inlet and an oil outlet, the oil channel being provided with a staggered groove portion, the heat dissipation oil enters the heat sink from the oil inlet, passes through the groove portion on the oil channel, and flows out of the heat sink from the oil outlet.

[0008] Furthermore, the number of the heat sinks is five.

[0009] Furthermore, the number of the heat sinks is more than five or less than five.

[0010] Furthermore, the oil inlet pipe is arranged at the lower left end of the heat sink assembly, and the oil outlet pipe is arranged at the upper right end of the heat sink assembly, and the oil inlet pipe and the oil outlet pipe are connected to the five heat sinks.

[0011] Furthermore, the heat sink is provided with an oil inlet and an oil outlet.

[0012] Furthermore, the oil channel is a single-flow pipeline, which takes the oil inlet as a starting point and the oil outlet as an end point, and connects the oil inlet and the oil outlet.

[0013] Furthermore, an oil inlet opening is provided on the oil inlet pipe, and the oil inlet opening is welded to the oil inlet. One end of the oil inlet pipe is connected to flange 1, and the flange 1 is used to connect the heat sink assembly and the transformer.

[0014] Furthermore, an oil outlet opening is provided on the oil outlet pipe, and the oil outlet opening is welded to the oil outlet port. One end of the oil outlet pipe is connected to a second flange, and the second flange is used to connect the heat sink assembly and the transformer.

[0015] Furthermore, the supporting plate includes a first supporting plate and a second supporting plate, and the first supporting plate and the second supporting plate are arranged on both sides of the heat sink opposite to each other.

[0016] Furthermore, the first support piece is arranged on a side close to the oil inlet pipe, and the second support piece is arranged on a side close to the oil outlet pipe.

[0017] The beneficial effects of the utility model are as follows: a heat sink assembly for a transformer of the utility model is recessed radially inward along the oil path on the outer surfaces of the front plate and the rear plate, and recessed radially outward along the oil path on the inner surfaces of the front plate and the rear plate; a cavity formed by the combination of the front plate and the rear plate is an oil path; heat dissipation oil enters the heat sink from the oil inlet, passes through the oil path, and flows out of the heat sink from the oil outlet; the single flow direction oil path avoids short-flow phenomenon, and has high heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] In the picture: Figure 1 A schematic structural diagram of the heat sink assembly provided by the present invention;

[0020] Figure 2 for Figure 1 Exploded view of the heat sink assembly;

[0021] Figure 3 for Figure 2 Schematic diagram of the structure of the heat sink;

[0022] Figure 4 for Figure 3 Front view of the middle heat sink;

[0023] Figure 5 for Figure 3 Bottom view of the middle heat sink;

[0024] Figure 6 for Figure 4 AA cross-sectional view of the middle heat sink;

[0025] Figure 7 for Figure 4 BB cross-sectional view of the middle heat sink;

[0026] Figure 8 for Figure 5 CC cross-sectional view of the middle heat sink;

[0027] Figure 9 for Figure 2 Schematic diagram of the structure of the oil inlet pipe;

[0028] Figure 10 for Figure 3 Schematic diagram of the structure of the middle oil outlet pipe.

[0029] 1. Heat sink assembly;

[0030] 10. Heat sink; 11. Main body; 12. Oil channel; 121. Groove; 13. Oil inlet; 14. Oil outlet;

[0031] 20. Oil inlet pipe; 21. Oil inlet opening; 22. Flange 1;

[0032] 30. Oil outlet pipe; 31. Oil outlet opening; 32. Flange 2;

[0033] 40. Support sheet; 41. First support sheet; 42. Second support sheet. DETAILED DESCRIPTION

[0034] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention is now described in detail with reference to the accompanying drawings. This figure is a simplified schematic diagram, which only illustrates the basics of the present invention in an illustrative manner, and therefore only shows the structures related to the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0035] See also Figure 1-2 The utility model provides a heat sink assembly 1 for a transformer, comprising a heat sink 10, an oil inlet pipe 20 arranged at one end of the heat sink assembly 1, an oil outlet pipe 30 arranged at the other end of the heat sink assembly 1, and support plates 40 arranged on both sides of the heat sink 10.

[0036] Specifically, in this embodiment, the number of the heat sinks 10 is five.

[0037] In some other embodiments, the number of heat sinks 10 may be more than five or less than five.

[0038] See also Figure 3-8 The heat sink 10 is a rectangular sheet structure with a cavity, including a body 11, an oil channel 12 embedded with the body 11, an oil inlet 13 arranged at one end of the oil channel 12, and an oil outlet 14 arranged at the other end of the oil channel 12.

[0039] The main body 11 is a sheet of metal. The main body 11 is embedded with the oil channel 12. The high-temperature heat dissipation oil in the oil channel 12 conducts heat to the air through the main body 11 to cool the oil.

[0040] The oil passage 12 is a staggered ring-shaped raised cavity structure. A staggered groove portion 121 is provided on the oil passage 12 . The oil passage 12 is a single pipeline. The oil passage 12 starts at the oil inlet 13 and ends at the oil outlet 14 , connecting the oil inlet 13 and the oil outlet 14 .

[0041] The oil inlet 13 is an arc-shaped opening and is disposed at the lower left end of the heat sink 10 .

[0042] The oil outlet 14 is an arc-shaped opening and is disposed at the upper right end of the heat sink 10 .

[0043] The oil inlet pipe 20 is arranged at the lower left end of the heat sink assembly 1 , and the oil outlet pipe 30 is arranged at the upper right end of the heat sink assembly 1 . The oil inlet pipe 20 and the oil outlet pipe 30 are connected to the five heat sinks 10 .

[0044] See also Figure 9-10An oil inlet opening 21 is provided on the oil inlet pipe 20, and the oil inlet opening 21 on the oil inlet pipe 20 is welded to the oil inlet 13, connecting the oil inlet pipe 20 and the oil inlet 13 on the heat sink 10. One end of the oil inlet pipe 20 is connected to a flange 22, which is used to connect the heat sink assembly 1 and the transformer.

[0045] An oil outlet opening 31 is provided on the oil outlet pipe 30, and the oil outlet opening 31 on the oil outlet pipe 30 is welded to the oil outlet port 14 on the heat sink 10, connecting the oil outlet pipe 30 and the oil outlet port 14 on the heat sink 10. One end of the oil outlet pipe 30 is connected to a flange 2 32, which is used to connect the heat sink assembly 1 and the transformer.

[0046] See also Figure 1-2 The supporting plate 40 includes a first supporting plate 41 and a second supporting plate 42 . The first supporting plate 41 and the second supporting plate 42 are arranged on both sides of the heat sink 10 opposite to each other.

[0047] The first support plate 41 is disposed on a side close to the oil inlet pipe 20 of the heat sink assembly 1 , and the second support plate 41 is disposed on a side close to the oil outlet pipe 30 of the heat sink assembly 1 .

[0048] The working process of the heat sink assembly 1 of the present invention is described below with reference to the accompanying drawings:

[0049] When the temperature inside the transformer rises, the cooling oil enters the oil inlet 13 of the heat sink 10 through the oil inlet pipe 20, flows to the oil outlet 30 in the single-flow oil channel, and then flows into the oil outlet pipe 30 after the cooling oil is cooled in the oil channel 12, thus completing the heat dissipation and ensuring the normal operation of the transformer.

[0050] Therefore, the heat sink assembly 1 of the present invention has at least the following beneficial effects:

[0051] The groove portion 121 increases the surface area of ​​the oil passage 12 through the staggered groove structure, thereby improving the heat dissipation efficiency.

[0052] The heat sink 10 is provided with only one oil inlet 13 and one oil outlet 14, so that the oil passage 12 has a single flow direction, thereby avoiding short-flow and insufficient utilization of the oil passage, and achieving high heat exchange efficiency.

[0053] The support sheet 40 can pass between the heat sinks 10 for support. At the same time, the support sheet 40 is made of a metal heat-conducting material and can conduct heat between the heat sinks 10 to expand the heat dissipation surface.

[0054] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed connections, removable connections, or integral connections. They can refer to mechanical connections, direct connections, or indirect connections through an intermediary. They can refer to internal communication between two components or interactions between two components. A person skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances. It should be understood that the terms "length," "width," "upper," "lower," "front and back," "left and right," "vertical," "horizontal," "top," "bottom," "inside," and "outside" and the like, indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. The above description is based on the preferred embodiments of the present invention. Based on the above description, relevant personnel are fully aware of the possibility of making various changes and modifications without departing from the scope of the present invention. The technical scope of this utility model is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A heat sink assembly for a transformer, characterized in that: The heat sink assembly (1) comprises a heat sink (10), an oil inlet pipe (20), an oil outlet pipe (30) and a support plate (40); the heat sink (10) comprises a body (11), an oil channel (12), an oil inlet (13) and an oil outlet (14); the oil channel (12) is provided with a staggered groove portion (121); heat dissipation oil enters the heat sink (10) from the oil inlet (13), passes through the groove portion (121) on the oil channel (12), and then flows out of the heat sink (10) from the oil outlet (14).

2. The heat sink assembly for a transformer according to claim 1, characterized in that: The number of the heat sinks (10) is five.

3. The heat sink assembly for a transformer according to claim 1, characterized in that: The number of the heat sinks (10) is five or more or less than five.

4. The heat sink assembly for a transformer according to claim 2, characterized in that: The oil inlet pipe (20) is arranged at the lower left end of the heat sink assembly (1), and the oil outlet pipe (30) is arranged at the upper right end of the heat sink assembly (1). The oil inlet pipe (20) and the oil outlet pipe (30) are connected to the five heat sinks (10).

5. The heat sink assembly for a transformer according to claim 4, characterized in that: The heat sink (10) is provided with an oil inlet (13) and an oil outlet (14).

6. The heat sink assembly for a transformer according to claim 5, characterized in that: The oil passage (12) is a single-flow pipeline. The oil passage (12) starts at the oil inlet (13) and ends at the oil outlet (14), connecting the oil inlet (13) and the oil outlet (14).

7. The heat sink assembly for a transformer according to claim 6, characterized in that: The oil inlet pipe (20) is provided with an oil inlet opening (21), and the oil inlet opening (21) is welded to the oil inlet port (13). One end of the oil inlet pipe (20) is connected to a flange 1 (22), and the flange 1 (22) is used to connect the heat sink assembly (1) and the transformer.

8. The heat sink assembly for a transformer according to claim 7, characterized in that: The oil outlet pipe (30) is provided with an oil outlet opening (31), and the oil outlet opening (31) is welded to the oil outlet port (14). One end of the oil outlet pipe (30) is connected to a second flange (32), and the second flange (32) is used to connect the heat sink assembly (1) and the transformer.

9. The heat sink assembly for a transformer according to claim 1, characterized in that: The support plate (40) comprises a first support plate (41) and a second support plate (42), wherein the first support plate (41) and the second support plate (42) are arranged opposite to each other on both sides of the heat sink (10).

10. The heat sink assembly for a transformer according to claim 9, characterized in that: The first support piece (41) is arranged on a side close to the oil inlet pipe (20), and the second support piece (42) is arranged on a side close to the oil outlet pipe (30).

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