A high-voltage winding split type railway traction transformer body

Abstract

The utility model belongs to traction transformer manufacturing technical field discloses a high voltage winding split type railway traction transformer body, including iron core, low voltage winding I, low voltage winding II, high voltage winding, insulating baffle I and insulating baffle II, are provided with the pressing plate in all winding's upper end, and are provided with the supporting plate in lower end, high voltage winding is divided into the upper high voltage winding and lower high voltage winding of symmetry, and the upper high voltage winding and lower high voltage winding respectively include the shielding area, the entanglement area and the continuous area distributed by center to both ends, the shielding area is by 1 working conductor wire and 1 shielding conductor wire and is wound into with four section shielding type winding mode, the entanglement area is by 1 wire and is wound into with double pie entanglement type winding mode, and the continuous area is by 1 wire and is wound into with continuous type winding mode. Use the traction transformer of the utility model, has reduced the ampere-turn imbalance between high and low voltage winding, has improved transformer anti short circuit ability, has reduced the overall size of transformer, and convenient safe transportation.

Description

Technical Field

[0001] This utility model belongs to the field of traction transformer manufacturing technology, and relates to a body structure for traction transformers. Background Technology

[0002] Currently, the capacity and voltage regulation range of traction transformers in China are increasing. Increased capacity leads to a larger overall transformer size, which impacts safe transportation. The increased voltage regulation range results in uneven ampere-turn distribution between the high and low voltage windings. During a short circuit, the windings must withstand significant mechanical forces, affecting electrical reliability. Furthermore, due to the high voltage levels, the transformer structure contains a large variety and quantity of insulation components, necessitating cost reduction. Considering these factors, it is necessary to improve the transformer structure to reduce the ampere-turn imbalance between the high and low voltage windings, improve the transformer's short-circuit withstand capability, reduce the overall size of the transformer, facilitate safe transportation, reduce costs, and enhance market competitiveness. Utility Model Content

[0003] The purpose of this invention is to solve the above-mentioned problems in the prior art and provide a high-voltage winding split-type railway traction transformer body. The traction transformer using this body reduces the ampere-turn imbalance between the high and low voltage windings, improves the transformer's short-circuit withstand capability, reduces the overall size of the transformer, facilitates safe transportation, and reduces the cost of the transformer.

[0004] To achieve the above objectives, the technical solution of this utility model is: a high-voltage winding split-type railway traction transformer body, comprising an iron core, a low-voltage winding I, and a high-voltage winding; an insulating partition I is provided between the iron core and the low-voltage winding I, and an insulating partition II is provided on the outside of the high-voltage winding; a pressure plate is provided at the upper end and a support plate is provided at the lower end of all windings; a low-voltage winding II is also provided between the low-voltage winding I and the high-voltage winding I, and an insulating partition II is provided between the low-voltage winding I and the low-voltage winding II. An insulating partition II is provided between the high-voltage winding II and the high-voltage winding; the high-voltage winding is divided into an upper high-voltage winding and a lower high-voltage winding; the upper high-voltage winding and the lower high-voltage winding are symmetrical, and each includes a shielding area, a tangled area and a continuous area distributed from the center to both ends; the shielding area is wound by one working conductor and one shielding conductor using a four-segment shielding winding method, the tangled area 18 is wound by one conductor using a double-panel tangled winding method, and the continuous area is wound by one conductor using a continuous winding method.

[0005] More preferably, a pressure block is also provided at the upper end of the pressure plate; the pressure block is made of laminated cardboard and includes an upper layer, a middle layer, and a lower layer, all three layers having corresponding binding holes, and is fixed together by binding ropes. The middle layer is used for height adjustment.

[0006] More preferably, insulating end ring I and insulating end ring II are provided between the low-voltage winding I and the support plate; insulating end ring I and insulating end ring II are provided between the low-voltage winding I and the pressure plate. Preferably, the insulating end ring I is a ring made of laminated paperboard with wire outlet holes; the insulating end ring II is composed of a paper ring and a plurality of pads evenly distributed along the circumference of the paper ring, both the paper ring and the pads are made of laminated paperboard, and the paper ring has wire outlet holes.

[0007] More preferably, an electrostatic ring and an insulating end ring II are provided between the low-voltage winding II and the support plate, and an electrostatic ring and an insulating end ring II are provided between the low-voltage winding II and the pressure plate; a counter-angle ring overlaps between the electrostatic ring, the insulating end ring II and the low-voltage winding II. Preferably, the insulating end ring II is composed of a paper ring and a plurality of pads evenly distributed along the circumference of the paper ring, both the paper ring and the pads are made of laminated paperboard, and the paper ring has wire outlet holes.

[0008] More preferably, an insulating end ring III is provided between the high-voltage winding and the support plate, and an insulating end ring III is provided between the high-voltage winding and the pressure plate; a positive angle ring and a negative angle ring overlap between the high-voltage winding and the insulating end ring III. Preferably, the insulating end ring III is composed of a paper ring and a plurality of pads evenly distributed along the circumference of the paper ring, and both the paper ring and the pads are made of laminated paperboard.

[0009] The beneficial effects of this utility model are: the traction transformer using the body of this utility model reduces the ampere-turn imbalance between the high and low voltage windings, improves the transformer's short-circuit withstand capability, reduces the overall size of the transformer, facilitates safe transportation, and reduces the cost of the transformer. Attached Figure Description

[0010] Figure 1 This is the front view of the present invention; Figure 2 This is a schematic diagram of the lead-out structure of the low-voltage winding I, low-voltage winding II, and high-voltage winding in this utility model.

[0011] In the diagram, 1 is the iron core, 2 is low-voltage winding I, 3 is low-voltage winding II, 4 is high-voltage winding, 41 is upper high-voltage winding, 42 is lower high-voltage winding, 5 is insulating partition I, 6 is insulating partition II, 7 is anti-angle ring, 8 is static ring, 9 is insulating end ring I, 10 is insulating end ring II, 11 is support plate, 13 is pressure plate, 14 is positive angle ring, 15 is wire exit, 16 is continuous zone, 17 is wire exit, 18 is tangled zone, 19 is shielding zone, 20 is wire exit, 21 is wire exit, 22 is wire exit, 23 is wire exit, 24 is wire exit, and 25 is insulating end ring III. Detailed Implementation

[0012] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0013] like Figures 1 to 2 As shown, this embodiment includes an iron core 1, low-voltage winding I2, low-voltage winding II3, and high-voltage winding 4 concentrically mounted on the outside of the iron core 1. The iron core 1 is a single-phase two-column stacked iron core, a single-phase four-column stacked iron core, or a three-phase three-column stacked iron core. Both low-voltage winding I2 and low-voltage winding II3 are made of copper wire and include several coils, insulating cylinders, support bars, pads, and guide fan-shaped plates. Low-voltage winding I2 has axial lead-out ends 21 and 23 at both ends, and low-voltage winding II3 has axial lead-out ends 22 and 24 at both ends. The high-voltage winding 4 is divided into an upper high-voltage winding 41 and a lower high-voltage winding 42. The upper high-voltage winding 41 and the lower high-voltage winding 42 are symmetrical, each including a shielding area 19, a tangled area 18, and a continuous area 16 distributed from the center to both ends. The shielded zone 19 is wound with one working conductor and one shielding conductor using a four-segment shielded winding method. The tangled zone 18 is wound with one conductor using a double-panel tangled winding method. The continuous zone 16 is wound with one conductor using a continuous winding method. The upper high-voltage winding 41 and the lower high-voltage winding 42 symmetrically lead out wire heads 15, 17, and 20 in the radial direction. The upper and lower wire heads 20 are connected in parallel and then led out. An insulating partition I5 is provided between the iron core 1 and the low-voltage winding I2, an insulating partition II6 is provided between the low-voltage winding I2 and the low-voltage winding II3, an insulating partition II6 is provided between the low-voltage winding II3 and the high-voltage winding 4, and an insulating partition II6 is provided on the outside of the high-voltage winding 4. A pressure plate 13 is provided at the upper end of all windings, and a support plate 11 is provided at the lower end. Insulating partition I5 includes support bars, paper tubes, and an iron core shielding cylinder. The support bars are evenly distributed around the circumference of the iron core 1 and tightly wrapped with shrink tape. The paper tubes are formed by overlapping insulating paperboards. The iron core shielding cylinder is formed by overlapping insulating paperboards with multiple copper strips attached to them. Copper braided wire is welded to the upper end of the iron core shielding cylinder, and the end of the copper braided wire is connected to a crimp connector for grounding. Insulating partition II6 includes support bars and paper tubes. The support bars are evenly distributed around the circumference of the iron core 1 and tightly wrapped with shrink tape. The paper tubes are formed by overlapping insulating paperboards. Support plate 11 and pressure plate 13 are made of laminated paperboard or laminated wood. Support plate 11 is placed on the lower clamp of the iron core 1 to support the entire body. Pressure plate 13 is placed on the upper part of the body to provide a pressing effect.

[0014] In this embodiment, insulating end rings I9 and II10 are provided between the low-voltage winding I2 and the support plate 11. Insulating end rings I9 and II10 are also provided between the low-voltage winding I2 and the pressure plate 13. Insulating end ring I9 is ​​a ring made of laminated paperboard with wire exit holes. Insulating end ring II10 consists of a paper ring and multiple spacers evenly distributed along the circumference of the paper ring. Both the paper ring and the spacers are made of laminated paperboard, and the paper ring has wire exit holes.

[0015] In this embodiment, an electrostatic ring 8 and an insulating end ring 210 are provided between the low-voltage winding II3 and the support plate 11; an electrostatic ring 8 and an insulating end ring 210 are also provided between the low-voltage winding II3 and the pressure plate 13. An anti-angle ring 7 overlaps between the electrostatic ring 8, the insulating end ring 210, and the low-voltage winding II3. The insulating end ring 210 consists of a paper ring and multiple spacers evenly distributed along the circumference of the paper ring. Both the paper ring and the spacers are made of laminated cardboard, and the paper ring has wire outlet holes.

[0016] In this embodiment, an insulating end ring III 25 is provided between the high-voltage winding 4 and the support plate 11, and an insulating end ring III 25 is provided between the high-voltage winding 4 and the pressure plate 13. A positive angle ring 14 and a negative angle ring 7 overlap between the high-voltage winding 4 and the insulating end ring III 25. The negative angle ring 7 and the positive angle ring 14 are molded insulating components. The insulating end ring III 25 consists of a paper ring and multiple spacers evenly distributed along the circumference of the paper ring; both the paper ring and the spacers are made of laminated paperboard.

[0017] In this embodiment, a pressure block 12 is also provided on the upper end of the pressure plate 13. The pressure block 12 is made of laminated cardboard and includes an upper layer, a middle layer, and a lower layer. Each of the three layers has corresponding binding holes, and the layers are fixed together by binding ropes. The middle layer is used for height adjustment.

[0018] Of course, there are other embodiments of this utility model. Without departing from the spirit and essence of this utility model, those skilled in the art can make corresponding changes and modifications based on this utility model. However, these corresponding changes and modifications should all be considered improvements of equivalent technology and fall within the protection scope of the claims of this utility model.

Claims

1. A high-voltage winding split-type railway traction transformer body, comprising an iron core (1), a low-voltage winding I (2) and a high-voltage winding (4); an insulating partition I (5) is provided between the iron core (1) and the low-voltage winding I (2), an insulating partition II (6) is provided on the outside of the high-voltage winding (4), and a pressure plate (13) is provided at the upper end of all windings and a support plate (11) is provided at the lower end; characterized in that: A low-voltage winding II (3) is also provided between the low-voltage winding I (2) and the high-voltage winding (4). An insulating partition II (6) is provided between the low-voltage winding I (2) and the low-voltage winding II (3). An insulating partition II (6) is provided between the low-voltage winding II (3) and the high-voltage winding (4). The high-voltage winding (4) is divided into an upper high-voltage winding (41) and a lower high-voltage winding (42). The upper high-voltage winding (41) and the lower high-voltage winding (42) are symmetrical, and respectively include a shielding area (19), a tangled area (18) and a continuous area (16) distributed from the center to both ends. The shielding area (19) is wound by a working conductor and a shielding conductor using a four-segment shielding winding method. The tangled area (18) is wound by a conductor using a double-panel tangled winding method. The continuous area (16) is wound by a conductor using a continuous winding method.

2. The high-voltage winding split-type railway traction transformer body according to claim 1, characterized in that: A pressure block (12) is also provided on the upper end of the pressure plate (13); the pressure block (12) is made of laminated paperboard, including an upper layer, a middle layer and a lower layer, and each of the three layers has a corresponding binding hole, which is tied and fixed together by binding rope.

3. The high-voltage winding split-type railway traction transformer body according to claim 1 or 2, characterized in that: Insulating end ring I (9) and insulating end ring II (10) are provided between the low voltage winding I (2) and the support plate (11); insulating end ring I (9) and insulating end ring II (10) are provided between the low voltage winding I (2) and the pressure plate (13).

4. The high-voltage winding split-type railway traction transformer body according to claim 3, characterized in that: The insulating end ring I (9) is a ring made of laminated paperboard with wire outlet holes; the insulating end ring II (10) consists of a paper ring and multiple pads evenly distributed along the circumference of the paper ring. Both the paper ring and the pads are made of laminated paperboard, and the paper ring has wire outlet holes.

5. The high-voltage winding split-type railway traction transformer body according to claim 1 or 2, characterized in that: An electrostatic ring (8) and an insulating end ring (10) are provided between the low-voltage winding II (3) and the support plate (11), and an electrostatic ring (8) and an insulating end ring (10) are provided between the low-voltage winding II (3) and the pressure plate (13); an anti-angle ring (7) is connected between the electrostatic ring (8), the insulating end ring (10) and the low-voltage winding II (3).

6. The high-voltage winding split-type railway traction transformer body according to claim 5, characterized in that: The insulating end ring II (10) consists of a paper ring and a plurality of pads evenly distributed along the circumference of the paper ring. Both the paper ring and the pads are made of laminated paperboard, and the paper ring has wire outlet holes.

7. The high-voltage winding split-type railway traction transformer body according to claim 1 or 2, characterized in that: An insulating end ring III (25) is provided between the high voltage winding (4) and the support plate (11), and an insulating end ring III (25) is provided between the high voltage winding (4) and the pressure plate (13); a positive angle ring (14) and a negative angle ring (7) are overlapped between the high voltage winding (4) and the insulating end ring III (25).

8. The high-voltage winding split-type railway traction transformer body according to claim 7, characterized in that: The insulating end ring Ⅲ (25) consists of a paper ring and a plurality of pads evenly distributed along the circumference of the paper ring. Both the paper ring and the pads are made of laminated paperboard.

9. The high-voltage winding split-type railway traction transformer body according to claim 3, characterized in that: An electrostatic ring (8) and an insulating end ring (10) are provided between the low-voltage winding II (3) and the support plate (11), and an electrostatic ring (8) and an insulating end ring (10) are provided between the low-voltage winding II (3) and the pressure plate (13); an anti-angle ring (7) is connected between the electrostatic ring (8), the insulating end ring (10) and the low-voltage winding II (3).

10. The transformer body of the high-voltage winding split-type railway traction transformer according to claim 3, characterized in that: An insulating end ring Ⅲ (25) is provided between the high voltage winding (4) and the support plate (11), and an insulating end ring Ⅲ (25) is provided between the high voltage winding (4) and the pressure plate (13); a positive angle ring (14) and a negative angle ring (7) are overlapped between the high voltage winding (4) and the insulating end ring Ⅱ (10).

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