Power transformer with good heat dissipation effect

Abstract

The application belongs to the technical field of transformers, and provides a power transformer with good heat dissipation effect, which comprises a shell and a transformer body, the transformer body is fixedly installed in the shell, and a plurality of groups of heat dissipation fins are fixedly installed on the two side surfaces of the transformer body, a filter screen is fixedly installed on the inner bottom of the shell, supports are fixedly installed on the two sides of the transformer body in the shell, and lifting plates distributed around the transformer body are slidingly installed on the supports. Compared with the prior art, the application has the following beneficial effects: the cooling oil flows downward along the gap between the lifting plates and the transformer body and the heat dissipation fins, so as to cover the surfaces of the transformer body and the heat dissipation fins, the flowing cooling oil can drive the dust attached to the transformer body and the heat dissipation fins to move downward into the shell, and the dust adhered and accumulated on the transformer body and the heat dissipation fins is avoided.

Description

Technical Field

[0001] This invention belongs to the field of transformer technology, and in particular relates to a power transformer with good heat dissipation. Background Technology

[0002] Three-phase integrated traction power transformers typically employ three-phase three-limb or three-phase five-limb structures. Three-phase three-limb transformers are simple in structure, consume less material, and occupy less space, but have a large reactive component in the no-load current. Three-phase five-limb transformers, on the other hand, add two side yokes to the three-phase three-limb design, which can form multiple magnetic circuits to transfer the magnetic flux through the core, reducing no-load current and no-load losses, and increasing transformer capacity.

[0003] Existing three-phase integrated traction power transformers generate high temperatures during long-term use, and their heat dissipation efficiency is low due to relying solely on their own heat dissipation structure. To address the aforementioned technical problem, Chinese patent CN114093610B proposes a method that involves two U-shaped brushes moving up and down during operation. The brushes move downwards to absorb oil from the oil tank and then move upwards to coat the surface of the transformer body with oil, enabling continuous, efficient, and automated heat dissipation and ensuring stable transformer operation. However, after the transformer surface is coated with cooling oil, it becomes wet. At this point, dust in the air will directly adhere to the transformer upon contact, resulting in a large amount of dust accumulation on the transformer and affecting heat dissipation. Summary of the Invention

[0004] The purpose of this invention is to provide a power transformer with good heat dissipation, aiming to solve the technical problem that dust easily adheres to the surface of transformers in the prior art, affecting heat dissipation.

[0005] The present invention is implemented as follows: a power transformer with good heat dissipation includes a shell and a transformer body. The transformer body is fixedly installed inside the shell, and multiple sets of heat dissipation fins are fixedly installed on both sides of the transformer body. A filter screen is fixedly installed at the bottom inside the shell.

[0006] The housing contains fixed brackets on both sides of the transformer body. Lifting plates distributed around the transformer body are slidably mounted on the brackets. A reciprocating screw is rotatably mounted on one set of brackets to drive the lifting plates up and down. One end of the reciprocating screw is fixedly connected to a rotating power component fixedly mounted on the bracket. The lifting plates have multiple sets of slots that match the heat dissipation fins. There are gaps between the lifting plates and the surfaces of the transformer body and the heat dissipation fins. An oil pump for supplying cooling oil to the lifting plates is fixedly mounted on the side of the housing.

[0007] Preferably, the filter screen has a frame-shaped structure and is located in the projection area of ​​the transformer body onto the bottom surface of the housing.

[0008] Preferably, the side wall of the lifting plate has an L-shaped cross-section, and the bottom surface of the lifting plate has a gap with the surface of the transformer body and the heat dissipation fins.

[0009] Preferably, the oil pump is connected to an oil suction pipe and an oil delivery pipe, with the end of the oil suction pipe away from the oil pump extending into the filter screen, and the end of the oil delivery pipe away from the oil pump connected to the lifting plate.

[0010] Preferably, a blower pipe is fixedly installed on the lifting plate by a mounting bracket. The blower pipe is distributed along the edge of the transformer body and heat dissipation fins. The blower pipe has blower holes and is connected to a fan fixedly installed on the side of the housing through an air supply pipe.

[0011] Preferably, the air blowing hole faces the surface of the transformer body and the heat dissipation fins, and the air flowing out of the air blowing hole flows downward after contacting the surface of the transformer body and the heat dissipation fins.

[0012] Preferably, a first support plate is fixedly installed on the bottom surface of the housing, a rotating shaft is rotatably installed on the first support plate, the rotating shaft is rotatably connected to the reciprocating screw through a bevel gear set, a plurality of spaced-apart propulsion blades are fixedly installed on the rotating shaft, a cover covering the propulsion blades is fixedly installed on the bottom surface of the housing, and a filter box that works with the cover is provided on the bottom surface of the housing.

[0013] Preferably, a second support plate is fixedly installed on the bottom surface of the housing, and a fixing screw is threaded on the second support plate. The fixing screw abuts against the filter box and presses the filter box tightly onto the cover.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] 1. The lifting plate moves up and down along the surface of the transformer body. At the same time, the oil pump draws cooling oil and delivers it to the lifting plate. The cooling oil exists in the area enclosed by the lifting plate and the transformer body. Simultaneously, the cooling oil flows downward along the gaps between the lifting plate and the transformer body and the heat dissipation fins. When the lifting plate moves up and down, the cooling oil flowing downward along the gaps between the lifting plate and the transformer body and the heat dissipation fins can cover the surface of the transformer body and the heat dissipation fins. The flowing cooling oil accelerates the heat dissipation speed of the transformer body and the heat dissipation fins, improving the heat dissipation effect. At the same time, the flowing cooling oil can carry the dust attached to the transformer body and the heat dissipation fins downward and into the housing, preventing dust from adhering and accumulating on the transformer body and the heat dissipation fins, further improving the heat dissipation effect of the transformer body and the heat dissipation fins.

[0016] 2. When large amounts of dust and impurities adhere to the transformer body and heat dissipation fins, the up-and-down movement of the lifting plate can push these larger impurities away from the transformer body and heat dissipation fins. Furthermore, the area where the lifting plate is located contains a large amount of cooling oil, which can soak the dust on the transformer body and heat dissipation fins, making it easier for the dust to detach. The cooling oil in the gaps between the lifting plate and the transformer body / heat dissipation fins flows rapidly under pressure, further cleaning the dust on the transformer body and heat dissipation fins, reducing the dust content, and further improving the heat dissipation effect of the transformer body and heat dissipation fins.

[0017] 3. As the lifting plate moves up and down, the fan delivers air to the blowing pipe through the air supply pipe. The air is blown onto the surface of the transformer body and heat dissipation fins through the blowing holes. The flowing air further accelerates the heat dissipation of the transformer body and heat dissipation fins, improving the heat dissipation effect. When the lifting plate moves down, the flowing air can blow the residual cooling oil on the transformer body and heat dissipation fins downwards to the lifting plate and converge. This allows the cooling oil to further carry the dust remaining on the surface of the transformer body and heat dissipation fins into the cooling oil on the lifting plate. The dust can then be removed by following the downward movement of the cooling oil or by cleaning the lifting plate, further improving the cleaning effect of dust on the transformer body and heat dissipation fins, and further improving the heat dissipation effect of the transformer body and heat dissipation fins. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 This is a schematic diagram of the shell structure from a first-view perspective in this invention.

[0020] Figure 3 This is a schematic diagram of the shell structure from a second perspective in this invention.

[0021] Figure 4 This is a schematic diagram of the lifting plate in this invention.

[0022] Figure 5 for Figure 4 An enlarged schematic diagram of region A in the middle.

[0023] Figure 6 This is a schematic diagram of the cover structure in this invention.

[0024] In the attached diagram: 1. Housing; 2. Transformer body; 3. Bracket; 4. Lifting plate; 5. Reciprocating screw; 6. Rotary power component; 7. Slot; 8. Heat dissipation fins; 9. Filter screen; 10. Oil pump; 11. Oil delivery pipe; 12. Oil extraction pipe; 13. Air blowing pipe; 14. Mounting bracket; 15. Air blowing hole; 16. Fan; 17. Air delivery pipe; 18. First support plate; 19. Rotating shaft; 20. Propeller blades; 21. Bevel gear set; 22. Cover; 23. Filter box; 24. Second support plate; 25. Fixing screw. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0026] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0027] like Figures 1-6 As shown, the present invention provides a power transformer with good heat dissipation effect, including a housing 1 and a transformer body 2. The transformer body 2 is fixedly installed inside the housing 1, and multiple sets of heat dissipation fins 8 are fixedly installed on both sides of the transformer body 2. A filter screen 9 is fixedly installed at the bottom inside the housing 1. The filter screen 9 has a frame structure and is located in the projection area of ​​the transformer body 2 onto the bottom surface of the housing 1.

[0028] Inside the housing 1, brackets 3 are fixedly installed on both sides of the transformer body 2. Lifting plates 4 are slidably installed on the brackets 3, distributed around the transformer body 2. The side wall of the lifting plate 4 has an L-shaped cross section, and the bottom surface of the lifting plate 4 is separated from the surface of the transformer body 2 and the heat dissipation fins 8. A reciprocating screw 5 is rotatably installed on one set of brackets 3 to drive the lifting plate 4 to move up and down. One end of the reciprocating screw 5 is fixedly connected to a rotating power component 6 fixedly installed on the bracket 3. Multiple sets of slots 7 that match the heat dissipation fins 8 are opened on the lifting plate 4. The lifting plate 4 is separated from the surface of the transformer body 2 and the heat dissipation fins 8. An oil pump 10 for supplying cooling oil to the lifting plate 4 is fixedly installed on the side of the housing 1. The oil pump 10 is connected to an oil suction pipe 12 and an oil delivery pipe 11. The end of the oil suction pipe 12 away from the oil pump 10 extends into the filter screen 9, and the end of the oil delivery pipe 11 away from the oil pump 10 is connected to the lifting plate 4.

[0029] In practical application, the transformer body 2 is fixedly installed inside the housing 1, and a set volume of cooling oil is added to the housing 1. When the transformer body 2 needs to be cooled, the rotating power component 6 drives the reciprocating screw 5 to rotate, thereby driving the lifting plate 4 to move up and down along the surface of the transformer body 2. At the same time, the oil pump 10 draws the cooling oil inside the filter screen 9 through the oil extraction pipe 12 and delivers it to the lifting plate 4 through the oil delivery pipe 11. The cooling oil exists in the area enclosed by the lifting plate 4 and the transformer body 2. At the same time, the cooling oil will flow downward along the gap between the lifting plate 4, the transformer body 2, and the heat dissipation fins 8. In the initial state, the oil supply speed of the oil pump 10 is greater than the downward flow speed of the cooling oil until the cooling oil level on the lifting plate 4 reaches the set height. After that, the oil supply speed of the oil pump 10 decreases to be equal to the downward flow speed of the cooling oil, so that the cooling oil level on the lifting plate 4 is maintained.

[0030] When the lifting plate 4 moves up and down, the cooling oil flows downward along the gap between the lifting plate 4 and the transformer body 2 and the heat dissipation fins 8, covering the surface of the transformer body 2 and the heat dissipation fins 8. The flowing cooling oil accelerates the heat dissipation speed of the transformer body 2 and the heat dissipation fins 8, improving the heat dissipation effect. At the same time, the flowing cooling oil can carry the dust attached to the transformer body 2 and the heat dissipation fins 8 downward into the housing 1, preventing dust from adhering and accumulating on the transformer body 2 and the heat dissipation fins 8, further improving the heat dissipation effect of the transformer body 2 and the heat dissipation fins 8.

[0031] When large amounts of dust and impurities adhere to the transformer body 2 and the heat dissipation fins 8, the up-and-down movement of the lifting plate 4 can push the larger impurities away from the transformer body 2 and the heat dissipation fins 8. In addition, the area where the lifting plate 4 is located contains a large amount of cooling oil, which can soak the dust on the transformer body 2 and the heat dissipation fins 8, making it easier for the dust to detach from the transformer body 2 and the heat dissipation fins 8. The cooling oil in the gap between the lifting plate 4 and the transformer body 2 and the heat dissipation fins 8 flows faster under pressure, which can better clean the dust on the transformer body 2 and the heat dissipation fins 8, reduce the dust content on the transformer body 2 and the heat dissipation fins 8, and further improve the heat dissipation effect of the transformer body 2 and the heat dissipation fins 8.

[0032] When the lifting plate 4 moves downward and detaches from the transformer body 2 and the heat dissipation fins 8, the cooling oil on the lifting plate 4 will quickly detach from the lifting plate 4, thereby cleaning the lifting plate 4, reducing the amount of dust residue on the lifting plate 4, and thus reducing the probability of dust re-attaching to the transformer body 2 and the heat dissipation fins 8. The cooling oil flowing downward along the transformer body 2 and the heat dissipation fins 8 and the cooling oil that quickly detaches from the lifting plate 4 both fall into the area outside the filter screen 9 inside the housing 1. The cooling oil inside the housing 1 is filtered by the filter screen 9 and then transported back to the lifting plate 4.

[0033] In one example of this embodiment, the rotating power component 6 is a motor, but it can also be a hydraulic motor or other components that can output rotational power. The motor drives the reciprocating screw 5 to rotate, thereby causing the lifting plate 4 to move up and down reciprocally.

[0034] like Figures 1-5 As shown, this invention provides a power transformer with good heat dissipation. A blower pipe 13 is fixedly installed on the lifting plate 4 by a mounting bracket 14. The blower pipe 13 is distributed along the edge of the transformer body 2 and the heat dissipation fins 8. The blower pipe 13 has blower holes 15. The blower pipe 13 is connected to a fan 16 fixedly installed on the side of the housing 1 through an air supply pipe 17.

[0035] Specifically, the air blowing hole 15 faces the surface of the transformer body 2 and the heat dissipation fins 8, and the air flowing out of the air blowing hole 15 flows downward after contacting the surface of the transformer body 2 and the heat dissipation fins 8.

[0036] In practical application, as the lifting plate 4 moves up and down, the fan 16 delivers air to the blowing pipe 13 through the air supply pipe 17. The air is blown onto the surface of the transformer body 2 and the heat dissipation fins 8 through the blowing holes 15. The flowing air further accelerates the heat dissipation of the transformer body 2 and the heat dissipation fins 8, improving the heat dissipation effect. When the lifting plate 4 moves down, the flowing air can blow the residual cooling oil on the transformer body 2 and the heat dissipation fins 8 downward to the lifting plate 4 and gather there. Thus, the cooling oil can further carry the dust remaining in the cooling oil on the surface of the transformer body 2 and the heat dissipation fins 8 downward into the cooling oil on the lifting plate 4. The dust can then be removed by moving down with the cooling oil or by cleaning the lifting plate 4, further improving the cleaning effect of the dust on the transformer body 2 and the heat dissipation fins 8, and further improving the heat dissipation effect of the transformer body 2 and the heat dissipation fins 8.

[0037] like Figure 2 , Figure 6 As shown, this invention provides a power transformer with good heat dissipation. A first support plate 18 is fixedly installed on the bottom surface of the inner shell 1. A rotating shaft 19 is rotatably installed on the first support plate 18. The rotating shaft 19 is rotatably connected to the reciprocating lead screw 5 through a bevel gear set 21. Multiple sets of spaced-distributed pusher blades 20 are fixedly installed on the rotating shaft 1. A cover 22 covering the pusher blades 20 is fixedly installed on the bottom surface of the inner shell 1. A filter box 23 that cooperates with the cover 22 is provided on the bottom surface of the inner shell 1.

[0038] Specifically, a second support plate 24 is fixedly installed on the bottom surface of the housing 1. A fixing screw 25 is threaded on the second support plate 24. The fixing screw 25 abuts against the filter box 23 and presses the filter box 23 onto the cover 22.

[0039] In practical application, when the reciprocating screw 5 rotates, it drives the rotating shaft 19 to rotate through the bevel gear set 21. When the rotating shaft 19 rotates, it drives the propulsion blades 20 to rotate and pushes the cooling oil in the cover 22 to move. Then, the cooling oil continues to flow through the filter box 23, thereby making the cooling oil in the housing 1 circulate. The circulation of the cooling oil accelerates the cooling of the cooling oil itself. During the circulation of the cooling oil, it is filtered by the filter box 23 and dust and impurities are collected, thereby reducing the impurity content in the cooling oil and improving the service life and heat dissipation effect of the cooling oil. After long-term use, the fixing screws 25 are released from the fixing of the filter box 23, the filter box 23 is taken out for cleaning, and then the filter box 23 is reinstalled.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

[0041] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A power transformer with good heat dissipation, comprising a casing (1) and a transformer body (2), characterized in that, The transformer body (2) is fixedly installed inside the housing (1), and multiple sets of heat dissipation fins (8) are fixedly installed on both sides of the transformer body (2). A filter screen (9) is fixedly installed at the bottom inside the housing (1). The housing (1) is fixedly installed with brackets (3) located on both sides of the transformer body (2). Lifting plates (4) distributed around the transformer body (2) are slidably installed on the brackets (3). A reciprocating screw (5) that drives the lifting plate (4) to move up and down is rotatably installed on one of the brackets (3). One end of the reciprocating screw (5) is fixedly connected to a rotating power component (6) fixedly installed on the bracket (3). Multiple slots (7) that match the heat dissipation fins (8) are opened on the lifting plate (4). There are gaps between the lifting plate (4) and the surface of the transformer body (2) and the heat dissipation fins (8). An oil pump (10) for conveying cooling oil to the lifting plate (4) is fixedly installed on the side of the housing (1).

2. The power transformer with good heat dissipation effect according to claim 1, characterized in that, The filter screen (9) is a frame structure and is located in the projection area of ​​the transformer body (2) onto the bottom surface of the housing (1).

3. The power transformer with good heat dissipation effect according to claim 1, characterized in that, The side wall of the lifting plate (4) has an L-shaped cross section, and the bottom surface of the lifting plate (4) is provided with a gap between the transformer body (2) and the surface of the heat dissipation fins (8).

4. A power transformer with good heat dissipation effect according to claim 1, characterized in that, The oil pump (10) is connected to the oil extraction pipe (12) and the oil delivery pipe (11). The end of the oil extraction pipe (12) away from the oil pump (10) extends into the filter screen (9), and the end of the oil delivery pipe (11) away from the oil pump (10) is connected to the lifting plate (4).

5. A power transformer with good heat dissipation effect according to claim 1, characterized in that, A blower pipe (13) is fixedly installed on the lifting plate (4) by a mounting bracket (14). The blower pipe (13) is distributed along the edge of the transformer body (2) and the heat dissipation fins (8). The blower pipe (13) has blower holes (15). The blower pipe (13) is connected to the fan (16) fixedly installed on the side of the housing (1) through the air supply pipe (17).

6. A power transformer with good heat dissipation effect according to claim 5, characterized in that, The air blowing hole (15) faces the surface of the transformer body (2) and the heat dissipation fins (8). The air flowing out of the air blowing hole (15) comes into contact with the surface of the transformer body (2) and the heat dissipation fins (8) and then flows downward.

7. A power transformer with good heat dissipation effect according to claim 1, characterized in that, The bottom surface of the housing (1) is fixedly installed with a first support plate (18), and a rotating shaft (19) is rotatably installed on the first support plate (18). The rotating shaft (19) is rotatably connected to the reciprocating screw (5) through a bevel gear set (21). Multiple sets of spaced-distributed pusher blades (20) are fixedly installed on the rotating shaft (19). A cover (22) covering the pusher blades (20) is fixedly installed on the bottom surface of the housing (1). A filter box (23) that works with the cover (22) is provided on the bottom surface of the housing (1).

8. A power transformer with good heat dissipation effect according to claim 7, characterized in that, A second support plate (24) is fixedly installed on the bottom surface of the housing (1). A fixing screw (25) is threaded on the second support plate (24). The fixing screw (25) abuts against the filter box (23) and presses the filter box (23) onto the cover (22).

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