Clamping fixing structure of traction transformer

Abstract

The application relates to the technical field of transformer manufacturing, and particularly discloses a clamping and fixing structure of a traction transformer, wherein a first clamping assembly is arranged at one end of an iron core along the axial direction of the iron core, the first clamping assembly comprises two first clamping pieces which are arranged in a spaced and opposite mode and used for clamping the iron core, a second clamping assembly is arranged at the other end of the iron core along the axial direction of the iron core, the second clamping assembly comprises two second clamping pieces which are arranged in a spaced and opposite mode and used for clamping the iron core, and the first clamping piece and the second clamping piece are integral bending structures. In this way, the two ends of the iron core are clamped by the two first clamping pieces and the two second clamping pieces respectively, and the integral bending structure is combined, so that the overall performance and stability can be effectively improved, manual welding work can be reduced, working hours can be reduced, production efficiency and operation safety can be improved.

Description

Technical Field

[0001] This invention relates to the field of transformer manufacturing technology, and in particular to a clamping and fixing structure for a traction transformer. Background Technology

[0002] With the development of rail transit, the research and development of lightweight traction transformers has become increasingly important. Lightweight design not only reduces energy consumption but also improves the acceleration performance and passenger capacity of the entire vehicle, thereby enhancing overall transportation efficiency. As a key structural device for fixing the iron core, the design and material selection of the traction transformer core clamp directly affect the performance of the entire device. A well-designed clamp structure can not only securely fix the iron core but also significantly impact the transformer's heat dissipation efficiency, power transmission stability, operational safety, and overall size and weight.

[0003] In the existing transformer core clamping structure, the upper and lower clamping units are welded together by the limb plates and web plates. The limb plates and web plates are reinforced by stiffeners and support plates to strengthen the overall and local structures. This results in many welding points, low production efficiency, increased manufacturing costs, and poor overall integrity. In addition, stress concentration at the welding points can easily lead to fatigue damage, increase maintenance costs, and affect its service life to some extent. Furthermore, it has problems such as large installation space and insufficient structural stability.

[0004] Therefore, there is an urgent need for a clamping and fixing structure for traction transformers to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a clamping and fixing structure for traction transformers, which can effectively improve the integrity and stability of the traction transformer clamping structure, and improve production efficiency and operational safety.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] This invention provides a clamping and fixing structure for a traction transformer. The traction transformer includes an oil tank, an iron core, and a cylindrical coil winding disposed on the iron core. The clamping and fixing structure for the traction transformer includes:

[0008] A first clamping assembly is disposed at one end of the iron core along its own axial direction. The first clamping assembly includes two first clamps, which are spaced apart and arranged opposite to each other and are used to clamp the iron core.

[0009] The second clamping assembly is disposed at the other end of the iron core along its own axial direction. The second clamping assembly includes two second clamps, which are spaced apart and arranged opposite to each other and used to clamp the iron core. Both the first clamp and the second clamp are integral bent structures.

[0010] As a preferred technical solution of the clamping and fixing structure of the above-mentioned traction transformer, the first clamping assembly further includes two first side brackets, both of which are installed between the two first clamps and pressed against both sides of the winding coil. The second clamping assembly further includes two second side brackets, both of which are installed between the two second clamps and pressed against both sides of the winding coil.

[0011] As a preferred technical solution of the clamping and fixing structure of the above-mentioned traction transformer, the first side bracket includes a pressing part, a first side plate, a second side plate and a support plate. The pressing part is pressed against the winding coil. The first side plate and the second side plate are respectively fixedly connected to the opposite sides of the pressing part to form an installation groove. The first side plate is connected to one of the first clamps, the second side plate is connected to the other of the first clamps, and the support plate is fixedly connected to the inner wall of the installation groove.

[0012] As a preferred technical solution of the clamping and fixing structure of the above-mentioned traction transformer, the clamping and fixing structure of the traction transformer further includes a plurality of first through-core screws and a plurality of second through-core screws. The plurality of first through-core screws are all connected between two first clamping members so that the two first clamping members clamp the iron yoke of the iron core. The plurality of second through-core screws are all connected between two second clamping members so that the two second clamping members clamp the iron yoke of the iron core.

[0013] As a preferred technical solution of the clamping and fixing structure of the above-mentioned traction transformer, the clamping and fixing structure of the traction transformer further includes a plurality of first pull screws and a plurality of second pull screws, wherein the plurality of first pull screws are connected between one of the first clamps and one of the second clamps, and the plurality of second pull screws are connected between another of the first clamps and another of the second clamps.

[0014] As a preferred technical solution of the clamping and fixing structure of the above-mentioned traction transformer, the first clamping member includes two mounting seats, a clamping body and several stiffening plates. The two mounting seats are respectively fixedly connected to both ends of the clamping body. The clamping body has a groove, and the several stiffening plates are spaced apart, and the several stiffening plates are all fixedly connected to the inner wall of the groove.

[0015] As a preferred technical solution of the clamping and fixing structure of the above-mentioned traction transformer, the clamping and fixing structure of the traction transformer further includes a first fixing component, which is fixedly connected between one of the first clamps and the top side of the oil tank.

[0016] As a preferred technical solution of the clamping and fixing structure of the above-mentioned traction transformer, the first fixing component includes two fixing plates, the two fixing plates are respectively arranged in correspondence with the two mounting seats, and the fixing plates are fixedly installed between the mounting seats and the top side of the oil tank.

[0017] As a preferred technical solution of the clamping and fixing structure of the above-mentioned traction transformer, the clamping and fixing structure of the traction transformer further includes a second fixing component. The second fixing component includes a plurality of positioning pins, and the plurality of positioning pins are connected between another of the first clamps and the bottom side of the oil tank.

[0018] As a preferred technical solution for the clamping and fixing structure of the above-mentioned traction transformer, both the first clamp and the second clamp are made of stainless steel.

[0019] The beneficial effects of this invention are as follows:

[0020] This invention provides a clamping and fixing structure for a traction transformer. The traction transformer includes an oil tank, an iron core, and a cylindrical coil winding disposed on the iron core. The clamping and fixing structure includes a first clamping assembly and a second clamping assembly. The first clamping assembly is disposed at one end of the iron core along its axial direction and includes two first clamping members, which are spaced apart and arranged opposite each other to clamp the iron core. The second clamping assembly is disposed at the other end of the iron core along its axial direction and includes two second clamping members, which are spaced apart and arranged opposite each other to clamp the iron core. Both the first and second clamping members are integrally bent structures. This configuration, using two first clamping members and two second clamping members to clamp the two ends of the iron core respectively, combined with the integral bent structure design, effectively improves the overall integrity and stability, reduces manual welding work, lowers working hours, and improves production efficiency and operational safety. Attached Figure Description

[0021] Figure 1 A schematic diagram of the clamping and fixing structure of the traction transformer provided by the present invention;

[0022] Figure 2 A partial structural schematic diagram of the clamping and fixing structure of the traction transformer provided by the present invention;

[0023] Figure 3 A schematic diagram of the structure of the first clamp provided by the present invention;

[0024] Figure 4 A schematic diagram of the structure of the first side trailer provided by the present invention.

[0025] in:

[0026] 1. First clamping component; 101. Mounting base; 102. Clamping body; 103. Rib plate;

[0027] 2. Second clamping component;

[0028] 3. First side bracket; 301. Pressing part; 302. First side plate; 303. Second side plate; 304. Support plate;

[0029] 4. Second side bracket; 5. First through bolt; 6. Second through bolt; 7. First tie bolt; 8. Second tie bolt; 9. Fixed bend plate. Detailed Implementation

[0030] Embodiments of the present invention are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0031] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions.

[0032] Unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and connections within two components or interactions between two components. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0033] Unless otherwise expressly specified and limited, "above" or "below" a second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of a second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" of a second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0034] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0035] like Figures 1 to 4 As shown, this embodiment provides a clamping and fixing structure for a traction transformer. The traction transformer includes an oil tank, an iron core, and a cylindrical coil winding disposed on the iron core. The clamping and fixing structure includes a first clamping assembly and a second clamping assembly. The first clamping assembly is disposed at one end of the iron core along its own axial direction and includes two first clamping members 1, which are spaced apart and arranged opposite each other to clamp the iron core. The second clamping assembly is disposed at the other end of the iron core along its own axial direction and includes two second clamping members 2, which are spaced apart and arranged opposite each other to clamp the iron core. Both the first clamping members 1 and the second clamping members 2 are integrally bent structures. This configuration, using two first clamping members 1 and two second clamping members 2 to clamp the two ends of the iron core respectively, combined with the design of an integral bent structure, can effectively improve the overall integrity and stability, reduce manual welding work, reduce working hours, and improve production efficiency and operational safety.

[0036] In this embodiment, both the first clamp 1 and the second clamp 2 are integrally bent from 06Cr19Ni10 stainless steel sheet. Of course, in other embodiments, the materials and methods of manufacturing the first clamp 1 and the second clamp 2 can be set according to actual needs, and no further restrictions are imposed here.

[0037] Optionally, to further coordinate the first clamp 1 and the second clamp 2 in pressing the winding coil and ensuring integrity, the first clamping assembly also includes two first side brackets 3, each installed between the two first clamps 1 and pressed against both sides of the winding coil. The second clamping assembly also includes two second side brackets 4, each installed between the two second clamps 2 and pressed against both sides of the winding coil. Furthermore, both the first side brackets 3 and the second side brackets 4 are made of 06Cr19Ni10 stainless steel sheet, and electrical insulation is achieved between the first side bracket and the first clamp 1, and between the second side bracket and the second clamp 2, through insulating pads and insulating sleeves.

[0038] Specifically, this embodiment provides the following exemplary technical solution: The first side bracket 3 includes a pressing part 301, a first side plate 302, a second side plate 303, and a support plate 304. The pressing part 301 presses against the winding coil. The first side plate 302 and the second side plate 303 are respectively fixedly connected to opposite sides of the pressing part 301 to form an installation groove. The first side plate 302 is connected to one of the first clamps 1 by a first bolt, and the second side plate 303 is connected to the other first clamp 1 by a second bolt. The support plate 304 is fixedly connected to the inner wall of the installation groove. It should be noted that the structures of the first side bracket 3 and the second side bracket 4 are completely identical, and will not be described further here.

[0039] Optionally, the clamping and fixing structure of the traction transformer further includes a plurality of first through-bolts 5 and a plurality of second through-bolts 6. The plurality of first through-bolts 5 are all connected between two first clamps 1, so that the two first clamps 1 clamp the yoke portion of the iron core. The plurality of second through-bolts 6 are all connected between two second clamps 2, so that the two second clamps 2 clamp the yoke portion of the iron core. Further, there are three of each of the first through-bolts 5 and second through-bolts 6. Simultaneously, both the first through-bolts 5 and second through-bolts 6 are installed in conjunction with insulating pads and insulating tubes to achieve electrical insulation between the clamps and between the clamps and the silicon steel sheets of the iron core.

[0040] Optionally, the clamping and fixing structure of the traction transformer further includes a plurality of first pull screws 7 and a plurality of second pull screws 8. Each of the first pull screws 7 is connected between one of the first clamps 1 and one of the second clamps 2, and each of the second pull screws 8 is connected between another of the first clamps 1 and another of the second clamps 2. Further, there are four of each of the first pull screws 7 and the second pull screws 8. Insulating sleeves are provided in the mounting holes of both the first pull screws 7 and the second pull screws 8 to provide electrical insulation between the first clamps 1 and the second clamps 2.

[0041] Optionally, to enhance the strength and overall integrity of the first clamping member 1, the first clamping member 1 includes two mounting seats 101, a clamping body 102, and several ribs 103. The two mounting seats 101 are respectively fixedly connected to both ends of the clamping body 102. The clamping body 102 has a groove, and the several ribs 103 are spaced apart, with each rib 103 fixedly connected to the inner wall of the groove. Further, there are four ribs 103, which are evenly spaced along the length of the clamping body 102. It should be noted that the structure of the first clamping member 1 is exactly the same as that of the second clamping member 2, and will not be described further here.

[0042] Optionally, the clamping and fixing structure of the traction transformer further includes a first fixing component, which is fixedly connected between one of the first clamps 1 and the top side of the oil tank. Further, the first fixing component includes two fixing plates 9, which are correspondingly arranged with two mounting seats 101, and the fixing plates 9 are fixedly installed between the mounting seats 101 and the top side of the oil tank.

[0043] Optionally, to further assist in installation and positioning, the clamping and fixing structure of the traction transformer also includes a second fixing component. This second fixing component includes several locating pins connected between another first clamp 1 and the bottom side of the tank. Further, the number of locating pins is four. This configuration reduces the need for a separate bottom fixing structure for the tank, facilitating transformer installation and eliminating the need for additional bottom installation clearance. This reduces the tank volume, lowers the transformer weight, and saves transformer materials.

[0044] It should be noted that, in order to ensure that the first clamp 1 and the second clamp 2 are grounded at a single point, insulating gaskets are set on the required insulating fasteners. At the same time, one of the second clamps 2 is fixedly connected to the top side of the oil tank with a first fixing component, and the other second clamp 2 is fixedly connected to the bottom side of the oil tank with a second fixing component.

[0045] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A clamping and fixing structure for a traction transformer, the traction transformer comprising an oil tank, an iron core, and a cylindrical winding coil disposed on the iron core, characterized in that, The clamping and fixing structure of the traction transformer includes: A first clamping assembly is disposed at one end of the iron core along its own axial direction. The first clamping assembly includes two first clamps (1), which are spaced apart and arranged opposite to each other and are used to clamp the iron core. The second clamping assembly is disposed at the other end of the iron core along its own axial direction. The second clamping assembly includes two second clamps (2), which are spaced apart and arranged opposite to each other to clamp the iron core. The first clamps (1) and the second clamps (2) are both integral bent structures. The first clamping assembly also includes two first side brackets (3), which are installed between the two first clamps (1) and pressed against both sides of the winding coil. The second clamping assembly also includes two second side brackets (4), which are installed between the two second clamps (2). The first side bracket (3) includes a pressing part (301), a first side plate (302), a second side plate (303), and a support plate (304). The pressing part (301) presses against the winding coil. The first side plate (302) and the second side plate (303) are respectively fixedly connected to the opposite sides of the pressing part (301) to form an installation groove. The first side plate (302) is connected to one of the first clamps (1), and the second side plate (303) is connected to the other first clamp (1). The support plate (304) is fixedly connected to the inner wall of the installation groove.

2. The clamping and fixing structure for the traction transformer according to claim 1, characterized in that, The clamping and fixing structure of the traction transformer also includes a plurality of first through-core screws (5) and a plurality of second through-core screws (6). The plurality of first through-core screws (5) are connected between two first clamps (1) so that the two first clamps (1) clamp the iron yoke of the iron core. The plurality of second through-core screws (6) are connected between two second clamps (2) so that the two second clamps (2) clamp the iron yoke of the iron core.

3. The clamping and fixing structure for the traction transformer according to claim 1, characterized in that, The clamping and fixing structure of the traction transformer also includes a plurality of first pull screws (7) and a plurality of second pull screws (8). The plurality of first pull screws (7) are connected between one of the first clamps (1) and one of the second clamps (2), and the plurality of second pull screws (8) are connected between another of the first clamps (1) and another of the second clamps (2).

4. The clamping and fixing structure for the traction transformer according to claim 1, characterized in that, The first clamp (1) includes two mounting bases (101), a clamping body (102) and several ribs (103). The two mounting bases (101) are respectively fixedly connected to the two ends of the clamping body (102). The clamping body (102) has a groove. Several ribs (103) are spaced apart and are fixedly connected to the inner wall of the groove.

5. The clamping and fixing structure for the traction transformer according to claim 4, characterized in that, The clamping and fixing structure of the traction transformer also includes a first fixing component, which is fixedly connected between one of the first clamps (1) and the top side of the oil tank.

6. The clamping and fixing structure for the traction transformer according to claim 5, characterized in that, The first fixing component includes two fixing plates (9), which are respectively arranged in correspondence with the two mounting seats (101), and the fixing plates (9) are fixedly installed between the mounting seats (101) and the top side of the oil tank.

7. The clamping and fixing structure for the traction transformer according to claim 6, characterized in that, The clamping and fixing structure of the traction transformer also includes a second fixing component, which includes several positioning pins, and the several positioning pins are connected between another of the first clamps (1) and the bottom side of the oil tank.

8. The clamping and fixing structure for the traction transformer according to claim 1, characterized in that, Both the first clamp (1) and the second clamp (2) are made of stainless steel.

Images