Heat dissipation mechanism for transformer

Abstract

The utility model relates to a heat dissipation mechanism for a transformer, which comprises a heat dissipation fin, the heat dissipation fin is of a cavity structure, a plurality of oil channels which are sequentially arranged in the left-right direction are arranged in the heat dissipation fin, the upper end of each oil channel is communicated with an inner cavity of the transformer through an oil conveying pipe, and the oil conveying pipe is located in the middle of the top of the heat dissipation fin; the radiator is characterized in that an oil baffle plate is fixedly arranged in the radiating fin, and the oil baffle plate is located above the oil duct and under the oil conveying pipe; oil going to enter the oil channels in the middle of the cooling fins is dispersed into the oil channels on the two sides of the cooling fins through the oil baffles, the cooling efficiency is improved, and the cooling fin is simple, efficient, safe and reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of transformers, in particular to a heat dissipation mechanism for a transformer. Background Art

[0002] Oil-immersed transformers usually adopt finned radiators. The finned radiator includes a plurality of fins. Usually, the fins are composed of seven oil channels with exactly the same size. The oil inlet of the fin is generally located in the middle of the top of the fin, resulting in a large flow rate in the oil channels close to the oil inlet and a small flow rate in the oil channels far from the oil inlet. According to the principle of heat transfer, the radiator fins and oil channels closer to the outside can better convect heat with the surrounding air, and the heat dissipation effect is better. For the oil channels in the middle, due to the influence of the surrounding oil channels, the conditions for natural convection and radiation heat dissipation are poor, and the heat dissipation capacity decreases. Therefore, it is necessary to solve the problems of unreasonable oil flow distribution in the oil channels and reduced heat dissipation effect of the fins. Summary of the Utility Model

[0003] Aiming at the deficiencies of the prior art, the utility model provides a heat dissipation mechanism for a transformer, which is simple, efficient, safe and reliable. The heat dissipation mechanism can disperse the oil to be fed into the middle oil channels of the fins into the oil channels on both sides of the fins through a baffle plate, thereby improving the heat dissipation efficiency.

[0004] The utility model is realized by the following technical solutions. A heat dissipation mechanism for a transformer is provided, which includes fins. The fins are of a cavity structure, and a plurality of oil channels arranged in sequence in the left-right direction are provided in the fins. The upper ends of the oil channels are connected to the inner cavity of the transformer through an oil delivery pipe. The connection part of the oil delivery pipe and the fins is located in the middle of the top of the fins. A baffle plate is fixedly arranged in the fins. The baffle plate is located above the oil channels and directly below the oil delivery pipe. The baffle plate can disperse the oil to be fed into the middle oil channels of the fins into the oil channels on both sides of the fins, thereby improving the heat dissipation efficiency of the fins.

[0005] As an optimization, the front and rear ends of the baffle plate are attached to the inner wall of the fins. The baffle plate can prevent oil from entering the oil channels directly below the baffle plate from the front and rear ends of the heat dissipation plate, thereby improving the oil dispersion efficiency.

[0006] As an optimization, the left and right ends of the baffle plate are arranged symmetrically about the vertical axis of the oil delivery pipe. The baffle plate can ensure uniform oil flow distribution in the oil channels on both sides, thereby improving the heat dissipation efficiency of the fins.

[0007] As an optimization, the baffle plate is an arc-shaped structure extending around the oil delivery pipe, and the inner arc surface of the baffle plate faces the oil delivery pipe. The arc-shaped baffle plate with the inner arc surface facing the oil delivery pipe provides a force for the oil to move obliquely towards the oil channels on both sides, and conveys the oil entering the fins to the oil channels on both sides of the fins.

[0008] The beneficial effects of the present utility model are as follows: The oil baffle disperses the oil that is about to enter the oil channels in the middle of the heat sink to the oil channels on both sides of the heat sink, improving the heat dissipation efficiency of the heat sink; the oil baffle prevents the oil from entering the oil channel directly below the oil baffle from the front and rear ends of the heat dissipation plate, improving the dispersion efficiency of the oil; the oil baffle ensures the uniform distribution of the oil flow in the oil channels on both sides, improving the heat dissipation efficiency of the heat sink; the arc-shaped oil baffle with the inner arc surface facing the oil delivery pipe provides a force for the oil to move obliquely towards the oil channels on both sides, and conveys the oil entering the heat sink to the oil channels on both sides inside the heat sink. Description of the Drawings

[0009] Figure 1 It is a schematic diagram of the internal structure of the heat sink of the present utility model;

[0010] Figure 2 It is a schematic diagram of the connection between the heat sink and the transformer of the present utility model;

[0011] As shown in the figure:

[0012] 1. Heat sink, 2. Oil delivery pipe, 3. Oil outlet pipe, 4. Transformer, 5. Oil baffle, 101. Oil channel. Detailed Embodiment

[0013] To clearly illustrate the technical features of this solution, the following is an elaboration of this solution through specific embodiments.

[0014] As Figure 1 and Figure 2 shown, the heat dissipation mechanism for a transformer of the present utility model includes a heat sink 1. The heat sink 1 is a cavity structure, and there are multiple oil channels 101 arranged in sequence in the left-right direction inside the heat sink 1. The upper end of the oil channel 101 is connected to the inner cavity of the transformer 4 through an oil delivery pipe 2, and the connection part of the oil delivery pipe 2 and the heat sink 1 is located at the middle position of the top of the heat sink 1; an oil baffle 5 is fixedly installed inside the heat sink 1. The oil baffle 5 is located above the oil channel 101 and directly below the oil delivery pipe 2; the present utility model includes multiple heat sinks 1 arranged in sequence along the extension direction of the oil delivery pipe 2. The bottom of the heat sink 1 is connected to the inner cavity of the transformer 4 through an oil outlet pipe 3. The heat sinks 1 are respectively connected to the oil delivery pipe 2 and the oil outlet pipe 3 in sequence, and the oil delivery pipe 2 and the oil outlet pipe 3 extend in the horizontal direction; the heat sink 1 extends in the vertical direction, and the oil channel 101 extends in the vertical direction; there are seven oil channels 101 with exactly the same size inside the heat sink 1.

[0015] The oil in the transformer 4 enters the heat sink 1 through the oil delivery pipe 2. The oil entering the heat sink 1 is diverted by the oil baffle 5 and flows into the oil channels 101 on both sides inside the heat sink 1. The heat sink 1 exchanges heat with the oil, the temperature of the oil decreases, and the oil re-enters the transformer 4 through the oil outlet pipe 3.

[0016] As Figure 1The front and rear ends of the shown oil baffle 5 are fitted to the inner wall of the heat sink 1; the oil baffle 5 extends along the axial direction of the oil pipeline 2.

[0017] The oil entering the heat sink 1 is diverted by the oil baffle 5 and flows from the left and right sides of the oil baffle 5 into the oil channels 101 on both sides inside the heat sink 1.

[0018] As Figure 1 shown, the left and right ends of the oil baffle 5 are arranged relatively with respect to the axis in the vertical direction of the oil pipeline 2.

[0019] The oil entering the heat sink 1 is diverted by the oil baffle 5 and evenly flows from the left and right sides of the oil baffle 5 into the oil channels 101 on both sides inside the heat sink 1.

[0020] As Figure 1 shown, the oil baffle 5 is an arc-shaped structure extending around the oil pipeline 2, and the inner arc surface of the oil baffle 5 faces the oil pipeline 2; the oil baffle 5 extends along the circumferential direction of the oil pipeline 2, and the radius of curvature of the oil baffle 5 is in the range of 100 - 120 mm.

[0021] The oil entering the heat sink 1 is diverted by the oil baffle 5 and evenly flows obliquely upward from the left and right sides of the oil baffle 5 into the oil channels 101 on both sides inside the heat sink 1, and the oil is distributed in a trend of more on both sides and less in the middle.

[0022] In the actual production process, the oil in the transformer 4 enters the heat sink 1 through the oil pipeline 2. The oil entering the heat sink 1 is diverted by the oil baffle 5 and evenly flows obliquely upward from the left and right sides of the oil baffle 5 into the oil channels 101 on both sides inside the heat sink 1, and the oil is distributed in a trend of more on both sides and less in the middle. The heat sink 1 exchanges heat with the oil, the temperature of the oil decreases and re-enters the transformer 4 through the oil outlet pipe 3.

[0023] Certainly, the above description is not limited to the above examples. The technical features not described in the present utility model can be realized by or adopted the prior art, and will not be elaborated here; the above embodiments and the drawings are only used to illustrate the technical solutions of the present utility model and are not a limitation to the present utility model. The present utility model has been described in detail with reference to the preferred embodiments. Those of ordinary skill in the art should understand that the changes, modifications, additions or substitutions made by those of ordinary skill in the technical field within the essence scope of the present utility model do not depart from the purpose of the present utility model and should also belong to the protection scope of the claims of the present utility model.

Claims

1. A heat dissipation mechanism for a transformer, comprising a heat sink (1), the heat sink (1) being a cavity structure, and a plurality of oil passages (101) arranged in sequence along the left-right direction are provided in the heat sink (1), the upper end of the oil passage (101) is connected to the inner cavity of a transformer (4) through an oil delivery pipe (2), and the connecting portion between the oil delivery pipe (2) and the heat sink (1) is located at the middle position of the top of the heat sink (1); characterized in that: An oil baffle plate (5) is fixedly arranged in the heat sink (1), the oil baffle plate (5) is located above the oil passage (101), and the oil baffle plate (5) is located directly below the oil delivery pipe (2).

2. The heat dissipation mechanism for a transformer according to claim 1, characterized in that: The front and rear ends of the oil baffle plate (5) are arranged in close contact with the inner wall of the heat sink (1).

3. The heat dissipation mechanism for a transformer according to claim 1, characterized in that: The left and right ends of the oil baffle plate (5) are arranged relative to each other with respect to the axis of the oil delivery pipe (2) in the vertical direction.

4. The heat dissipation mechanism for a transformer according to claim 1, characterized in that: The oil baffle plate (5) is an arc-shaped structure extending around the oil delivery pipe (2), and the inner arc surface of the oil baffle plate (5) faces the oil delivery pipe (2).

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