Single-phase converter transformer

Abstract

The utility model relates to the technical field of power equipment, in particular to a single-phase converter transformer which comprises a transformer body and a temperature control oil tank, a hot oil injection rising channel is fixedly arranged at the top of the transformer body, a thermometer is fixedly installed at the bottom of the temperature control oil tank, and an iron core column is fixedly installed in the transformer body. The winding is fixedly installed outside the iron core column in a winding mode, the flat copper pipe is fixedly arranged in the iron core column, the oil pump is fixedly installed on one side of the bottom of the temperature control oil tank, the upper end through pipe of the flat copper pipe is connected with the hot oil injection channel, and the characteristic that hot oil floats upwards due to small density is utilized to promote the hot oil to be rapidly separated from a heating source. An aluminum alloy radiator is fixedly connected to the outer side of the winding, and wave-type radiators are fixedly arranged on the two sides of the temperature control oil tank, so that effective cooling of the interior of the transformer is achieved, and the temperature control oil tank and the winding accurately meet the heat dissipation requirement in the mode that heat is taken away through natural convection of cooling fin air and powerful wind power heat is combined.

Description

Technical Field

[0001] This utility model relates to the field of power equipment technology, specifically to a single-phase converter transformer. Background Technology

[0002] With the rapid development of high-voltage direct current (HVDC) transmission technology worldwide, converter transformers, as one of the core components of HVDC transmission systems, directly affect the stability, reliability, and transmission efficiency of the entire transmission system. Traditional converter transformers typically use valve-side leads to extend from the transformer body along the transformer body to the short shaft side of the oil tank, and then use valve-side bushings to extend them out of the oil tank and connect to the power grid.

[0003] Existing heat dissipation efficiency is limited. Under high-power operation, heat accumulates rapidly in the windings and core. Traditional heat dissipation methods are unable to dissipate the heat in time, resulting in excessively high equipment temperature, which in turn affects electromagnetic and insulation performance. Utility Model Content

[0004] In view of the above-mentioned shortcomings of the existing technology, this utility model provides a single-phase converter transformer, which can effectively solve the problem of excessive temperature caused by the difficulty in dissipating heat from the windings and core in the existing technology.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] This utility model provides a single-phase converter transformer, including a transformer body and a temperature-controlled oil tank. A hot oil injection riser channel is fixedly installed on the top of the transformer body, and a thermometer is fixedly installed on the bottom of the temperature-controlled oil tank. The hot oil injection riser channel is connected to the thermometer through a pipe. An iron core column is fixedly installed inside the transformer body, and a winding is fixedly installed on the outside of the iron core column by winding. A flat copper tube is fixedly installed inside the iron core column. An oil pump is fixedly installed on one side of the bottom of the temperature-controlled oil tank, and the oil pump is connected to the lower part of the flat copper tube through a pipe. An oil filling port is fixedly installed on the top of the temperature-controlled oil tank, and the oil filling port is connected to the internal pipe of the transformer body.

[0007] Preferably, an aluminum alloy heat sink is fixedly connected to the outside of the winding, and an air cooler is fixedly installed at the bottom of the aluminum alloy heat sink. The air cooler includes a first fan and an air shroud. The top of the first fan is fixedly connected to the air shroud. The aluminum alloy heat sink includes heat dissipation fins and microchannels fixedly connected to the winding. The microchannels are located inside the heat dissipation fins. The lower end of the microchannels is connected to the top of the air shroud via a pipe. The first fan is used to draw cold air from the outside, gather it inside the air shroud, and force it into the microchannels for gas flow.

[0008] Preferably, the side of the transformer body is provided with an assembly plate, and the interior of the assembly plate is provided with a screw assembly, which penetrates the inner wall of the assembly plate and is threadedly connected to the transformer body.

[0009] Preferably, a step plate is fixedly provided at the lower part of the assembly plate, and the side of the step plate is fixedly connected to the side of the first fan.

[0010] Preferably, wave-shaped radiators are fixedly installed on both sides of the temperature control oil tank. The wave-shaped radiator includes wave-shaped heat dissipation fins fixedly connected to the temperature control oil tank, and the wave-shaped heat dissipation fins are provided with air holes.

[0011] Preferably, a blower box is fixedly installed at the lower part of the temperature control oil tank, and a second ventilation fan is fixedly installed at the top of the blower box. The top of the blower box is open and located at the lower part of the corrugated heat sink.

[0012] Preferably, an oil filling port is fixedly installed on the top of the temperature-controlled oil tank. The oil filling port includes a fixing block fixedly connected to the temperature-controlled oil tank. A funnel is opened on the top of the fixing block, and an oil pipe is fixedly installed on the lower surface of the funnel. The oil pipe is connected to the internal pipe of the temperature-controlled oil tank.

[0013] The technical solution provided by this utility model has the following advantages compared with the known prior art:

[0014] 1. This utility model uses an oil pump to transport cooling oil into the core column, quickly removing the heat generated by the core column. The hot oil that absorbs the heat flows back to the temperature-controlled oil tank through the rising channel. Utilizing the characteristic that hot oil with low density floats, it is quickly separated from the heat source. As the hot oil returns to the temperature-controlled oil tank, it naturally flows upward, rapidly dissipating heat. The cooling oil at the bottom of the temperature-controlled oil tank is at a lower temperature and is pumped into the bottom of the transformer body. The cooling oil with a higher temperature inside the transformer body flows into the hot oil injection rising channel at the top of the flat copper tube, effectively cooling the inside of the transformer. With reduced reliance on the oil pump, a natural convection circulation is formed between the transformer body and the temperature-controlled oil tank to complete the heat exchange function.

[0015] 2. This utility model incorporates an aluminum alloy radiator on the outer surface of the winding to absorb and dissipate heat, and wave-shaped radiators on both sides of the temperature control oil tank to absorb and dissipate heat. Because the heat sink fins greatly increase the contact area with the air, the spacing between the heat sink fins improves the smoothness of airflow. The addition of an air cooler and a fan box accelerates the airflow, achieving a combination of natural air convection to remove heat and strong airflow to precisely match the heat dissipation needs of the temperature control oil tank and winding. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a side view of the overall structure of this utility model from a bottom angle;

[0019] Figure 3 This is a schematic diagram of the iron core column of this utility model;

[0020] Figure 4 This is a schematic cross-sectional view of the iron core column of this utility model;

[0021] Figure 5 This is a schematic diagram of the heat dissipation fin structure of this utility model;

[0022] Figure 6 This is a schematic diagram of the wave-shaped heat sink structure of this utility model;

[0023] Figure 7 This utility model Figure 6 Enlarged diagram of point A in the middle.

[0024] Reference numerals: 1. Transformer body; 2. Temperature-controlled oil tank; 3. Hot oil injection channel; 4. Thermometer; 5. Core column; 6. Flat copper tube; 7. Oil pump; 8. Oil filling port; 81. Fixing block; 82. Funnel; 83. Oil pipe; 9. Winding; 10. Aluminum alloy radiator; 11. Air cooler; 111. First fan; 112. Air shroud; 13. Screw assembly; 14. Stepped plate; 15. Assembly plate; 16. Wave-shaped radiator; 17. Second ventilation fan; 18. Heat dissipation fins; 19. Microchannel; 20. Air box; 21. Wave-shaped heat dissipation fins; 22. Vent. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0026] The present invention will be further described below with reference to the embodiments.

[0027] Example 1:

[0028] Reference Figures 1 to 7 A single-phase converter transformer includes a transformer body 1 and a temperature-controlled oil tank 2. A hot oil injection riser channel 3 is fixedly installed on the top of the transformer body 1, and a thermometer 4 is fixedly installed on the bottom of the temperature-controlled oil tank 2. The hot oil injection riser channel 3 is connected to the thermometer 4 through a pipe. An iron core column 5 is fixedly installed inside the transformer body 1, and a winding 9 is fixedly installed on the outside of the iron core column 5 by winding. A flat copper tube 6 is fixedly installed inside the iron core column 5. An oil pump 7 is fixedly installed on one side of the bottom of the temperature-controlled oil tank 2. The oil pump 7 is connected to the lower part of the flat copper tube 6 through a pipe to introduce low-temperature cooling oil into the iron core column 5. The upper end of the flat copper tube 6 is connected to the hot oil injection riser channel 3. Taking advantage of the characteristic that hot oil with low density will float, the hot oil will be quickly separated from the heat source. An oil filling port 8 is fixedly installed on the top of the temperature-controlled oil tank 2. The oil filling port 8 is connected to the internal pipe of the transformer body 1.

[0029] An assembly plate 15 is provided on the side of the transformer body 1. A screw assembly 13 is provided inside the assembly plate 15. The screw assembly 13 passes through the inner wall of the assembly plate 15 and is threadedly connected to the transformer body 1. The assembly plate 15 is provided to facilitate disassembly. When performing internal maintenance on the transformer, the screw assembly 13 can be removed first for initial disassembly outside the transformer. A step plate 14 is fixedly provided at the lower part of the assembly plate 15. The side of the step plate 14 is fixedly connected to the side of the first fan 111.

[0030] The top of the temperature-controlled oil tank 2 is fixedly equipped with an oil filling port 8. The oil filling port 8 includes a fixing block 81 fixedly connected to the temperature-controlled oil tank 2. A funnel 82 is opened on the top of the fixing block 81. An oil pipe 83 is fixedly installed on the lower surface of the funnel 82. The oil pipe 83 is connected to the internal pipe of the temperature-controlled oil tank 2. By setting the funnel 82 with an inclined plane design in the oil filling port 8, the opening for pouring cooling oil is relatively large, which can reduce the precision requirements of the oil pouring operation position and ensure that the oil flows into the oil tank as soon as it enters the funnel 82.

[0031] Example 2:

[0032] Reference Figures 1 to 7Based on Embodiment 1, this utility model provides a single-phase commutator transformer. An aluminum alloy heat sink 10 is fixedly connected to the outside of the winding 9. An air cooler 11 is fixedly installed at the bottom of the aluminum alloy heat sink 10. The air cooler 11 includes a first fan 111 and an air-collecting shroud 112. The top of the first fan 111 is fixedly connected to the air-collecting shroud 112. The aluminum alloy heat sink 10 includes heat dissipation fins 18 and microchannels 19 fixedly connected to the winding 9. The microchannels 19 are located inside the heat dissipation fins 18, and the lower end of the microchannels 19 is connected to the top of the air-collecting shroud 112 via a pipe. The first fan 111 draws cold air from the outside, which is then forced into the microchannels 19 after accumulating inside the air-collecting shroud 112. The aluminum alloy heat sink 10 absorbs the heat dissipated by the winding 9. Since both are made of metal, which has good thermal conductivity, the first fan 111 automatically starts when the temperature approaches a set threshold, accelerating airflow with strong airflow. The microchannel 19 uses forced air cooling technology to accelerate heat dissipation from the winding 9. Wave-shaped radiators 16 are fixedly installed on both sides of the temperature-controlled oil tank 2. Each wave-shaped radiator 16 includes wave-shaped heat sink fins 21 fixedly connected to the temperature-controlled oil tank 2. The wave-shaped heat sink fins 21 have vents 22. The surface of the heat sink is designed with complex structures such as waves and serrations to significantly increase the contact area with air. Perforations on the heat sink further optimize airflow, allowing natural air convection to remove heat and maintain stable oil temperature. A fan box 20 is fixedly installed at the bottom of the temperature-controlled oil tank 2, and a second ventilation fan 17 is fixedly installed at the top of the fan box 20. The top of the fan box 20 is open and located below the wave-shaped heat sink fins 21. The fan box 20 has a temperature control system; once the temperature approaches a set threshold, the fan automatically starts, accelerating airflow with strong airflow. When the temperature drops back to a safe range, the fan slows down or stops according to a program, saving energy and precisely adapting to heat dissipation needs.

[0033] The working principle of this utility model is as follows:

[0034] When the transformer is working, the temperature of the internal iron core column 5 first rises due to the heat generated. A flat copper tube 6 is fixedly installed inside the iron core column 5. An oil pump 7 is fixedly installed on one side of the bottom of the temperature control oil tank 2. The upper end of the flat copper tube 6 is connected to the hot oil injection rise channel 3. Taking advantage of the characteristic that hot oil has a low density and will rise, the hot oil is quickly separated from the heat source. The oil pump 7 is connected to the lower end of the flat copper tube 6 through a pipe to introduce low temperature cooling oil into the iron core column 5.

[0035] During long-term operation, the winding 9 also begins to rise in temperature. The aluminum alloy heat sink 10 can also absorb heat for the winding 9 to cool it down. Once the temperature approaches the set threshold, the first fan 111 is used to draw cold air from the outside, which is then gathered inside the wind shroud 112 and forced into the microchannel 19 for gas flow.

[0036] Due to the long-term absorption and introduction of a large amount of heat by the temperature-controlled oil tank 2, in order to achieve good cooling and self-circulation heat dissipation, the wave-shaped heat sink 21 is provided with air holes 22. By designing the surface of the heat sink with complex structures such as wave-shaped and sawtooth shapes, the contact area with air is increased many times over. The second ventilation fan 17 accelerates the ventilation speed. When the temperature drops back to a safe range, the second ventilation fan 17 slows down or stops according to the program, precisely adapting to the heat dissipation needs.

[0037] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of this utility model.

Claims

1. A single-phase converter transformer, characterized in that, The transformer includes a transformer body (1) and a temperature-controlled oil tank (2). A hot oil injection riser channel (3) is fixedly installed on the top of the transformer body (1). A thermometer (4) is fixedly installed on the bottom of the temperature-controlled oil tank (2). The hot oil injection riser channel (3) is connected to the thermometer (4) through a pipe. An iron core column (5) is fixedly installed inside the transformer body (1). A winding (9) is fixedly installed on the outside of the iron core column (5) by winding. A flat copper tube (6) is fixedly installed inside the iron core column (5). An oil pump (7) is fixedly installed on one side of the bottom of the temperature-controlled oil tank (2). The oil pump (7) is connected to the lower part of the flat copper tube (6) through a pipe. An oil filling port (8) is fixedly installed on the top of the temperature-controlled oil tank (2). The oil filling port (8) is connected to the internal pipe of the transformer body (1).

2. A single-phase converter transformer according to claim 1, characterized in that, An aluminum alloy radiator (10) is fixedly connected to the outside of the winding (9). An air cooler (11) is fixedly installed at the bottom of the aluminum alloy radiator (10). The air cooler (11) includes a first fan (111) and a wind-gathering shroud (112). The top of the first fan (111) is fixedly connected to the wind-gathering shroud (112). The aluminum alloy radiator (10) includes heat dissipation fins (18) and microchannels (19) fixedly connected to the winding (9). The microchannels (19) are located inside the heat dissipation fins (18). The lower end of the microchannels (19) is connected to the top of the wind-gathering shroud (112) via a pipe. The first fan (111) is used to draw cold air from the outside, which is then gathered inside the wind-gathering shroud (112) and forced into the microchannels (19) for gas flow.

3. A single-phase converter transformer according to claim 2, characterized in that, The transformer body (1) has an assembly plate (15) on its side. The assembly plate (15) has a screw assembly (13) inside it. The screw assembly (13) passes through the inner wall of the assembly plate (15) and is threadedly connected to the transformer body (1).

4. A single-phase converter transformer according to claim 3, characterized in that, A step plate (14) is fixedly provided on the lower part of the assembly plate (15), and the side of the step plate (14) is fixedly connected to the side of the first fan (111).

5. A single-phase converter transformer according to claim 1, characterized in that, The temperature control oil tank (2) is fixedly provided with wave-shaped radiators (16) on both sides. The wave-shaped radiator (16) includes wave-shaped heat sink (21) fixedly connected to the temperature control oil tank (2). The wave-shaped heat sink (21) has air holes (22).

6. A single-phase converter transformer according to claim 5, characterized in that, The lower part of the temperature control oil tank (2) is fixedly provided with a blower (20), and the top of the blower (20) is fixedly provided with a second ventilation fan (17). The top of the blower (20) is open and located below the wave-shaped heat sink (21).

7. A single-phase converter transformer according to claim 1, characterized in that, The temperature-controlled oil tank (2) is fixedly equipped with an oil filling port (8). The oil filling port (8) includes a fixing block (81) fixedly connected to the temperature-controlled oil tank (2). A funnel (82) is opened on the top of the fixing block (81). An oil pipe (83) is fixedly installed on the lower surface of the funnel (82). The oil pipe (83) is connected to the internal pipe of the temperature-controlled oil tank (2).

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