Energy-saving traction transformer

Abstract

The invention belongs to the technical field of transformers, and particularly provides an energy-saving traction transformer which comprises a case with one side fixedly connected with an oil conservator, a high-voltage winding and a low-voltage winding are arranged at the top of the case, and the high-voltage winding and the low-voltage winding penetrate through the top of the case and are connected to a transformer winding in the case; radiator groups are fixed on two sides of the case; a mounting groove is formed in the bottom in the case, a cylindrical base is arranged in the mounting groove, a cold liquid inlet pipe is arranged in the base, penetrates out of the bottom of the case and is communicated to the radiator group, and an oil pump is arranged on the cold liquid inlet pipe; a mounting plate is clamped in the mounting groove, a vertical supporting column is arranged at the top of the mounting plate, and the top of the supporting column abuts against an upper cover plate of the case; a cold liquid channel is arranged in the supporting column, the cold liquid inlet pipe is inserted into and hermetically communicated with the cold liquid channel, a plurality of liquid outlets are formed in the two sides, close to the transformer winding, of the supporting column and communicated with the cold liquid channel, and a liquid outlet is formed in the upper portion of the case and communicated with the radiator set. The directional circulation of the cooling oil can be realized.

Description

Technical Field

[0001] The present invention relates to the technical field of transformers, and in particular to an energy-saving traction transformer. Background Art

[0002] Traction transformers, which utilize the principle of electromagnetic induction to transfer electrical energy or transmit signals from one circuit to another, are crucial electrical devices for these functions. For rail vehicles, traction transformers are one of the most critical pieces of equipment and the core of the entire electric traction system, ensuring the stable operation of locomotives, EMUs, urban rail transit, and high-speed trains. For the past century, traction transformers have been a common component of railway traction and considered the best alternative to traditional fuel-powered traction systems.

[0003] The cooling oil flow path within existing transformers is poorly optimized, allowing hot oil to accumulate in the winding area, leading to localized overheating. Especially for high-power traction transformers, the traditional single-path cooling oil circulation makes it difficult to achieve uniform heat dissipation across the winding area, impacting equipment life and operational stability. Summary of the Invention

[0004] In view of the above-mentioned defects, the present invention provides an energy-saving traction transformer, which optimizes its internal oil circuit to ensure that the cooling oil in the winding area can circulate in time.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an energy-saving traction transformer, comprising a chassis, a high-voltage winding and a low-voltage winding provided on the top of the chassis, the high-voltage winding and the low-voltage winding passing through the top of the chassis and connected to the transformer winding inside the chassis; a radiator assembly is fixedly connected to both sides of the chassis; The bottom of the chassis is provided with a mounting groove, and cylindrical bases are provided at the four corners of the bottom of the mounting groove. A coolant inlet pipe is provided at the center of the base. The coolant inlet pipe passes through the bottom of the chassis and is connected to the liquid outlet pipe at the bottom of the radiator group. An oil pump is provided at the connection between the coolant inlet pipe and the liquid outlet pipe. A mounting plate is clamped in the mounting groove, the four corners of the bottom of the mounting plate abut against the top of the base, and vertical support columns are provided at the four corners of the top of the mounting plate, and the tops of the support columns abut against the bottom of the upper cover of the chassis; A cooling liquid channel with a blocked top and an open bottom is provided inside the support column, the cooling liquid inlet pipe is inserted and sealed and connected to the cooling liquid channel, a plurality of liquid outlet holes are provided on both sides of the support column close to the transformer winding, the liquid outlet holes are connected to the cooling liquid channel, and liquid outlet pipes are provided on the upper parts of both sides of the chassis to connect to the radiator group; The top of the mounting plate is fixedly connected with a lower mounting clamping plate, the top of the lower mounting clamping plate is fixedly connected with a transformer winding, and the top of the transformer winding is fixed with an upper mounting clamping plate.

[0006] As a further improvement of the present invention, a venturi tube is provided between two adjacent support columns on the mounting plate, and the bottom of the venturi tube is connected to the cold liquid inlet pipe.

[0007] As a further improvement of the present invention, a sealing groove is provided on the top of the base, and a sealing ring is provided in the sealing groove.

[0008] As a further improvement of the present invention, the support column is in the shape of a quadrangular column with one end chamfered.

[0009] As a further improvement of the present invention, the lower mounting splint includes plate bodies on both sides, a support beam is arranged between the plate bodies on both sides, and a fixing plate is fixedly connected to the lower sides of the outer sides of the plate body, and the fixing plate is provided with fixing holes and is fixedly connected to the mounting plate by bolts.

[0010] As a further improvement of the present invention, a guide protrusion is provided at the bottom of the upper cover plate of the chassis. The middle part of the guide protrusion is convex downward and the two sides are upward arc-shaped. The two ends are flush with the top of the liquid outlet pipe connected to the upper part of the chassis.

[0011] As a further improvement of the present invention, the radiator group is composed of a plurality of arranged radiating fins.

[0012] As a further improvement of the present invention, an oil conservator is fixedly connected to one side of the chassis, the bottom of the oil conservator is connected to the inside of the chassis through an oil supply pipe, and an openable and closable regulating valve is installed on the oil supply pipe.

[0013] As a further improvement of the present invention, the oil conservator is fixedly connected to the top of the bracket fixedly connected to the chassis, a solar panel is fixedly connected to the top of the oil conservator, and the oil pump and the regulating valve are both electrically connected to the solar panel.

[0014] Beneficial effects of the present invention: 1. Through the internal cooling channels and multi-directional outlet holes designed into the support columns, cooling liquid is ejected in multiple directions from the vertical array of holes in the four corner support columns, forming a three-dimensional cooling flow field surrounding the transformer windings. Simultaneously, the high-speed jet from the Venturi tube forces the hot liquid upward, eliminating the dead zones associated with traditional solutions. The chassis's top guide protrusion has a double-curvature structure, with a downward convex center to guide the liquid flow, and curved raised sides to direct the flow, directing the hot liquid to the two outlets, further promoting circulation.

[0015] 2. The top of the support column directly supports the upper cover of the chassis, forming a four-point rigid support structure, which enhances the stability of the transformer.

[0016] 3. The solar panels directly power the oil pump and electric regulating valve, establishing an overall cooling cycle energy supply and oil replenishment system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is an axonometric diagram of the energy-saving traction transformer of the present invention; Figure 2 This is a schematic diagram of the interior of the energy-saving traction transformer chassis; Figure 3 yes Figure 2 A is an enlarged schematic diagram; Figure 4 It is a schematic diagram of the transformer winding support structure; Figure 5 It is a schematic diagram of the internal structure of an energy-saving traction transformer; Figure 6 yes Figure 5 Enlarged schematic diagram of point B in FIG.

[0018] In the figure: 1-chassis, 2-radiator group, 3-bracket, 4-oil storage cabinet, 5-high-voltage winding, 6-low-voltage winding, 7-solar panel, 8-mounting slot, 9-cold liquid inlet pipe, 10-base, 100-sealing groove, 11-sealing ring, 12-mounting plate, 13-Venturi tube, 14-support column, 140-cold liquid channel, 141-liquid outlet, 15-heightening plate, 16-lower mounting plate, 17-support beam, 18-fixing plate, 19-oil pump, 20-guide protrusion, 21-liquid outlet pipe. DETAILED DESCRIPTION

[0019] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings. It should be understood that the specific examples described herein are merely for the purpose of explaining the present invention and are not intended to limit the present invention. The directional terms mentioned in the following embodiments, such as up, down, left, right, front or back, etc., are merely references to the directions in the accompanying drawings. Therefore, the directional terms used are for illustration and are not intended to limit the present invention. In addition, the same reference numerals represent the same elements throughout the embodiments.

[0020] See also Figures 1 to 6 The present invention provides an energy-saving traction transformer, comprising a chassis 1. The chassis 1 is a rectangular box, with a bracket 3 fixedly connected to one side of the chassis 1. An oil conservator 4 is fixedly connected to the upper end of the bracket 3. An oil supply pipe is provided at the bottom of the oil conservator 4, connecting to the chassis 1. A reclosable regulating valve is installed on the oil supply pipe. A solar panel 7 is fixedly connected to the top cover of the oil conservator 4.

[0021] As a further explanation of this embodiment, by opening the regulating valve on the oil supply pipe, the cooling oil stored in the oil storage cabinet 4 can be input into the chassis 1 to replenish the cooling oil lost in the chassis 1. The regulating valve is an electric valve and is powered by the solar panel 7.

[0022] A high-voltage winding 5 and a low-voltage winding 6 are provided on the top of the chassis 1 . The high-voltage winding 5 and the low-voltage winding 6 pass through the top of the chassis 1 and are connected to the transformer winding inside the chassis 1 .

[0023] Two opposite sides of the chassis 1 are respectively fixedly connected with a radiator group 2, and the radiator group 2 is composed of a plurality of radiating fins arranged and combined.

[0024] The bottom of the chassis 1 is provided with a mounting groove 8, which is a rectangular groove structure. The four corners of the bottom of the mounting groove 8 are provided with a base 10, which is cylindrical. The top outer edge of the base 10 is provided with a sealing groove 100, and a sealing ring 11 is installed in the sealing groove 100.

[0025] A coolant inlet pipe 9 is provided at the center of the base 10. The coolant inlet pipe 9 passes through the bottom of the chassis 1. The end of the coolant inlet pipe 9 away from the chassis 1 is connected to the outlet pipe at the bottom of the radiator assembly 2. An oil pump 19 is provided at the connection between the coolant inlet pipe 9 and the outlet pipe. The oil pump 19 is powered by the solar panel 7.

[0026] A mounting plate 12 is provided on the top of the base 10. The mounting plate 12 is engaged in the mounting slot 8. The four corners of the bottom of the mounting plate 12 abut against the tops of the support columns 14. Vertical support columns 14 are provided at the four corners of the top of the mounting plate 12. The tops of the support columns 14 abut against the bottom of the upper cover of the chassis 1.

[0027] As a further explanation of this embodiment, a number of transformer components such as high-voltage windings 5 ​​and low-voltage windings 6 need to be fixed on the upper cover plate, and the support columns 14 can further reinforce the upper cover plate to prevent it from deformation.

[0028] The support column 14 is shaped like a quadrangular prism with one end chamfered. A cooling liquid channel 140 is provided inside the support column 14. The top of the cooling liquid channel 140 is sealed, and the bottom of the cooling liquid channel 140 is open vertically downward. The cooling liquid inlet pipe 9 is inserted into the cooling liquid channel 140 of the support column 14. The outer wall of the cooling liquid inlet pipe 9 is sealed against the inner wall of the cooling liquid channel 140, and the two are sealed and connected. A plurality of liquid outlet holes 141 are provided on both sides of the support column 14 adjacent to the chamfered area. The liquid outlet holes 141 are connected to the cooling liquid inlet pipe 9, and the plurality of liquid outlet holes 141 are arranged in an array along the vertical direction of the support column 14.

[0029] As a further explanation of this embodiment, the coolant in the radiator can enter the coolant channel 140 in the middle of the support column 14 through the coolant inlet pipe 9 and be discharged from the liquid outlet 141.

[0030] Two venturi tubes 13 are respectively provided between the two support columns 14 along the long side direction of the mounting plate 12 , and the bottom of the venturi tube 13 is also connected to the cooling liquid inlet pipe 9 .

[0031] A heightening plate 15 is fixedly connected to the top of the mounting plate 12 . The heightening plate 15 is arranged in a direction parallel to the long side of the rectangle and is located between the support columns 14 .

[0032] A lower mounting plate 16 is mounted on top of the raised plate 15. This plate 16 comprises two side panels, with a support beam 17 positioned between them. Fixing plates 18 are fixedly attached to the lower sides of the panels on either side. These L-shaped panels have mounting holes that allow bolts to secure the lower mounting plate 16 to the raised plate 15.

[0033] As a further explanation of this embodiment, lower mounting plate 16 is used to support and clamp the transformer windings and is fixed to the bottom of the transformer windings. An upper mounting plate is also provided above chassis 1. This upper mounting plate has the same structure as lower mounting plate 16 and is not fixed to the upper portion of the transformer windings, further tightening the transformer windings. The transformer windings are conventional transformer components and are not shown.

[0034] A guide protrusion 20 is provided at the bottom of the upper cover plate of the chassis 1. The middle part of the guide protrusion 20 is downwardly convex, and the two sides of the guide protrusion 20 are arranged in an upward arc shape. The two ends of the guide protrusion 20 are flush with the top of the liquid outlet pipe 21 opened on the upper part of the two sides of the chassis 1.

[0035] The working principle and usage process of this embodiment are as follows: When the energy-saving traction transformer is running, the solar panel 7 supplies power to the oil pump 19 at the coolant inlet pipe 9. The oil pump 19 pushes the coolant in the radiator into the support column 14 through the coolant inlet pipe 9. The coolant moves upward along the coolant channel 140 in the support column 14 and is then discharged from the liquid outlet 141 on the support column 14. The coolant is preferentially discharged to the surrounding areas of the transformer winding in the chassis 1 to cool the transformer winding.

[0036] At the same time, the Venturi tube 13 on the mounting plate 12 also sprays out cold liquid synchronously, and the hot liquid itself floats upward. The high-speed liquid sprayed out by the Venturi tube 13 further pushes the surrounding of the transformer winding, and the heated liquid moves upward. The hot liquid moves upward and collides with the top guide protrusion 20, and moves to both sides along the guide protrusion 20. It is discharged into the radiator through the liquid outlet pipes 21 on both sides of the top of the chassis 1, and is cooled by the radiator. After cooling, it enters the chassis 1 again to cool the transformer winding.

[0037] The above are merely preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above-mentioned implementation measures. All technical solutions based on the principles of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, various improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. An energy-saving traction transformer, characterized in that: The invention comprises a chassis (1), wherein a high-voltage winding (5) and a low-voltage winding (6) are provided on the top of the chassis (1), and the high-voltage winding (5) and the low-voltage winding (6) pass through the top of the chassis (1) and are connected to the transformer winding inside the chassis (1); and a radiator group (2) is fixedly connected to both sides of the chassis (1); The bottom of the chassis (1) is provided with a mounting groove (8), and the four corners of the bottom of the mounting groove (8) are provided with a cylindrical base (10). A cooling liquid inlet pipe (9) is provided at the center of the base (10). The cooling liquid inlet pipe (9) passes through the bottom of the chassis (1) and is connected to the liquid outlet pipe at the bottom of the radiator group (2). An oil pump (19) is provided at the connection between the cooling liquid inlet pipe (9) and the liquid outlet pipe. A mounting plate (12) is engaged in the mounting groove (8), the four corners of the bottom of the mounting plate (12) abut against the top of the base (10), and vertical support columns (14) are provided at the four corners of the top of the mounting plate (12), and the top of the support column (14) abuts against the bottom of the upper cover of the chassis (1); A cooling liquid channel (140) with a blocked top and an open bottom is provided inside the support column (14); the cooling liquid inlet pipe (9) is inserted into and sealed to be connected to the cooling liquid channel (140); a plurality of liquid outlet holes (141) are provided on both sides of the support column (14) close to the transformer winding; the liquid outlet holes (141) are connected to the cooling liquid channel (140); and liquid outlet pipes (21) are provided on the upper parts of both sides of the chassis (1) to be connected to the radiator group (2); The top of the mounting plate (12) is fixedly connected to a lower mounting clamping plate (16), the top of the lower mounting clamping plate (16) is fixedly connected to a transformer winding, and the top of the transformer winding is fixed to an upper mounting clamping plate.

2. The energy-saving traction transformer according to claim 1, characterized in that: A venturi tube (13) is provided between two adjacent support columns (14) on the mounting plate (12), and the bottom of the venturi tube (13) is connected to the cold liquid inlet pipe (9).

3. The energy-saving traction transformer according to claim 1, characterized in that: A sealing groove (100) is provided on the top of the base (10), and a sealing ring (11) is provided in the sealing groove (100).

4. The energy-saving traction transformer according to claim 1, characterized in that: The support column (14) is in the shape of a quadrangular column with one end chamfered.

5. The energy-saving traction transformer according to claim 1, characterized in that: The lower mounting clamping plate (16) comprises a plate body on both sides, a support beam (17) is provided between the plate bodies on both sides, and a fixing plate (18) is fixedly connected to the lower sides of the outer sides of the plate body, and the fixing plate (18) is provided with a fixing hole and is fixedly connected to the mounting plate (12) by bolts.

6. The energy-saving traction transformer according to claim 1, characterized in that: A flow guide protrusion (20) is provided at the bottom of the upper cover plate of the chassis (1). The middle portion of the flow guide protrusion (20) is downwardly convex, and both sides are upwardly curved. Both ends are flush with the tops of the liquid outlet pipes (21) connected to the upper portions of both sides of the chassis (1).

7. The energy-saving traction transformer according to claim 1, characterized in that: The radiator group (2) is composed of a plurality of arranged radiating fins.

8. The energy-saving traction transformer according to claim 1, characterized in that: An oil storage cabinet (4) is fixedly connected to one side of the chassis (1), and the bottom of the oil storage cabinet (4) is connected to the interior of the chassis (1) via an oil supply pipe, and an openable and closable regulating valve is installed on the oil supply pipe.

9. The energy-saving traction transformer according to claim 8, characterized in that: The oil storage cabinet (4) is fixedly connected to the top of a bracket (3) fixedly connected to the chassis (1), a solar panel (7) is fixedly connected to the top of the oil storage cabinet (4), and the oil pump (19) and the regulating valve are both electrically connected to the solar panel (7).

Images