Transformer body

Abstract

The utility model discloses a transformer body, which relates to the technical field of transformers and comprises an iron core, the iron core comprises a core column, an upper iron yoke and a lower iron yoke, and two end parts of the iron core are respectively provided with a first clamping component and a second clamping component; the winding coats the outer side of the core column; the pressing ring is arranged between the first clamping assembly and the winding, and a plurality of wedge blocks are arranged on the bottom surface of the pressing ring. According to the transformer body, the technical problems that an existing transformer body is large in overall axial height size, large in occupied oil tank space, large in weight and incapable of meeting the requirements for light weight and miniaturization of a transformer are solved, the pressing ring and the wedge block are installed after the upper iron yoke is installed, the height size of the upper iron yoke part enters the interior of the pressing ring, and therefore the pressing ring and the wedge block are installed. The distance between the upper iron yoke and the upper end face of the winding is further reduced, meanwhile, the overall axial size and weight of the transformer body are reduced, and the oil tank space occupied by the transformer body is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of transformers, and particularly relates to a transformer core body. Background Art

[0002] There are limits on the space and weight of the equipment compartment of a train. As the core component of the traction system of a rail vehicle, the transformer is the power source of the train, and the core body of the transformer is the core and key component of the electromagnetic conversion equipment of the transformer. The operating conditions of the transformer are complex. Especially for on-vehicle traction transformers, they not only have to resist the action of electrodynamic force but also need to withstand the test of the complex vibration environment of the operating line.

[0003] In the existing transformer core body, each winding is axially compressed by a separate insulating pressing ring. The pressing ring at the end of the winding needs to be installed before the yoke laminations are inserted. The distance between the winding and the end face of the yoke is large, resulting in a large overall axial height dimension of the core body, a large occupied oil tank space, and a relatively large self-weight of the transformer, which cannot meet the requirements of lightweight and miniaturization of the transformer. Therefore, a transformer core body for solving the above problems is proposed. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a transformer core body, which solves the technical problems that the existing transformer core body has a large overall axial height dimension, resulting in a large occupied oil tank space, and a relatively large self-weight of the transformer, which cannot meet the requirements of lightweight and miniaturization of the transformer.

[0005] To achieve the above purpose, the utility model provides a transformer core body, including:

[0006] A core, including a core column, an upper yoke and a lower yoke. The core column is arranged between the upper yoke and the lower yoke. First clamping components and second clamping components for fixing the core are respectively arranged at both ends of the core.

[0007] Windings, which are coated and arranged outside the core column, and the windings are arranged between the first clamping component and the second clamping component.

[0008] A pressure ring, which is arranged between the first clamping component and the windings. A plurality of wedges are arranged on the bottom surface of the pressure ring, and the top surfaces of the plurality of wedges are all abutted against the lower end surface of the upper yoke.

[0009] Preferably, the first clamping component includes: two upper clamping members, which are symmetrically arranged on both sides of the upper yoke, and the two upper clamping members are connected by a plurality of first horizontal screws.

[0010] Preferably, the second clamping component includes: two lower clamping members, which are symmetrically arranged on both sides of the lower yoke, and the two lower clamping members are connected by a plurality of second horizontal screws.

[0011] Preferably, a plurality of reinforcing rib plates are integrally arranged on the outer sides of the upper clamping member and the lower clamping member respectively, and the reinforcing rib plates are respectively used to enhance the structural strength of the upper clamping member and the lower clamping member.

[0012] Preferably, the upper clamping member and the lower clamping member located on the same side of the iron core are connected by a plurality of vertical screw rods.

[0013] Preferably, the pressure ring is annular, and a plurality of through holes are arranged on the top surface of the pressure ring, and the through holes are used for passing through the vertical screw rods.

[0014] Preferably, a plurality of limiting grooves are arranged on the inner peripheral side surface of the pressure ring, and a plurality of limiting blocks are arranged on the outer peripheral side surface of the iron core, and the limiting grooves are snap-connected to the limiting blocks.

[0015] Preferably, a plurality of wedge block guiding grooves are arranged on the top surface of the pressure ring, and each wedge block guiding groove is snap-connected to a wedge block.

[0016] Preferably, the wedge block includes a holding portion and a connecting portion integrally arranged, the holding portion is used for holding the winding, and the connecting portion is connected to the pressure ring by bolts.

[0017] Preferably, an iron yoke insulation is sleeved on the outer peripheral side surface of the core column, and the iron yoke insulation is integrally circular.

[0018] Compared with the above background art, a transformer body provided by the present utility model has the following beneficial effects:

[0019] (1) In the present utility model, the pressure ring and the wedge block can be installed after the installation of the upper iron yoke is completed, which will not affect the inserting operation of the upper iron yoke, so that the height dimension of the upper iron yoke part enters the inside of the pressure ring, and the distance between the upper iron yoke and the upper end surface of the winding is further reduced, reducing the overall axial dimension and weight of the transformer body, effectively reducing the oil tank space occupied by the transformer body, so as to meet the requirements of the power system, especially the rail transit traction system, for the light weight and miniaturization of the transformer.

[0020] (2) In the present utility model, an inserting operation space is reserved between the lower end surface of the upper iron yoke and the winding, and the wedge block is inserted to hold the pressure ring. While the pressure ring further presses the winding, the upper iron yoke is supported and pressed by the wedge block, so that the winding and the upper iron yoke are always in a compressed state in the axial direction, effectively ensuring the stability of the winding in the axial and radial directions to resist the deformation of the internal structure of the transformer and the vibration of the line, and improving the stability of the overall structure of the transformer. Description of the Drawings

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the provided drawings.

[0022] Figure 1 The three-dimensional structure diagram of the transformer body provided by the embodiment of the present invention;

[0023] Figure 2 The three-dimensional structure diagram of the transformer body from another angle provided by the embodiment of the present invention;

[0024] Figure 3 The cross-sectional schematic diagram of the transformer body provided by the embodiment of the present invention;

[0025] Figure 4 For Figure 3 The enlarged schematic diagram at position A in

[0026] Figure 5 The three-dimensional structure diagram of the pressure ring provided by the embodiment of the present invention;

[0027] Figure 6 The three-dimensional structure diagram of the wedge block provided by the embodiment of the present invention.

[0028] Specifically, 1 - iron core; 2 - first clamping assembly; 201 - upper clamping part; 202 - first horizontal screw; 3 - second clamping assembly; 301 - lower clamping part; 302 - second horizontal screw; 4 - winding; 5 - pressure ring; 501 - limiting groove; 502 - limiting hole; 503 - wire passing hole; 6 - wedge block; 601 - top holding part; 602 - connecting part; 603 - slope surface; 7 - reinforcing rib plate; 8 - vertical screw; 9 - yoke insulation; 10 - support plate. Detailed implementation manners

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0030] To enable those skilled in the art of this technology to better understand the solution of the present invention, the following will further elaborate on the present invention in conjunction with the drawings and specific implementation manners.

[0031] Such as Figure 1 AndFigure 2 As shown, a transformer core body includes: a core 1, a winding 4, and a clamping ring 5.

[0032] The core 1 is vertically arranged in the overall transformer. The core 1 includes a core column (not shown in the figure), an upper yoke, and a lower yoke. The core column is arranged between the upper yoke and the lower yoke to form a magnetizable core body with a rectangular cross-section. The specific structures of the core column, the upper yoke, and the lower yoke can refer to the prior art and will not be elaborated herein. Among them, both the upper yoke and the lower yoke are composed of several yoke laminations spliced together to form an integral structure. Among them, a first clamping assembly 2 and a second clamping assembly 3 are respectively arranged at both ends of the core 1. The first clamping assembly 2 and the second clamping assembly 3 are respectively used to fix both ends of the core 1, further fix the corresponding yoke laminations, and at the same time fix other components at both ends of the core 1.

[0033] The winding 4 is integrally in a circular ring shape and is coated on the outer peripheral side of the core column. Among them, the winding 4 is designed according to the shape of the core 1. The winding 4 is arranged between the first clamping assembly 2 and the second clamping assembly 3. Among them, the upper end face of the winding 4 abuts against the bottom face of the clamping ring 5.

[0034] As Figure 3 and Figure 4 shown, the clamping ring 5 is arranged below the first clamping assembly 2. The clamping ring 5 is in a ring shape. The bottom face of the clamping ring 5 abuts against the upper end face of the winding 4. Among them, the structure of the clamping ring 5 is designed according to the structure of the winding 4 to ensure that the clamping ring 5 can fit as closely as possible to the upper end face of the winding 4. Several wedges 6 are arranged on the bottom face of the clamping ring 5. An insertion space for laminations is reserved between the lower end face of the upper yoke and the winding 4. By inserting the wedges 6, the wedges 6 hold up the clamping ring 5, so that the clamping ring 5 further presses tightly against the upper end face of the winding 4. It should be noted that the clamping ring 5 and the wedges 6 are installed after the upper yoke is installed, so as to prevent the upper yoke from entering the inside of the clamping ring and affecting the installation of the yoke laminations, further reducing the distance between the upper yoke and the upper end face of the winding 4. While meeting the insulation distance requirements, the overall axial dimension and weight of the transformer core body are minimized, and the oil tank space occupied by the transformer core body is reduced.

[0035] When assembling the transformer core, the winding 4 is wrapped around the outer peripheral side of the core column. First, install the upper yoke. After installing the upper yoke, the clamping ring 5 is sleeved on the outer peripheral side of the upper yoke from top to bottom. Further, install the first clamping assembly 2. The first clamping assembly 2 fixes the upper yoke, and the first clamping assembly 2 is connected to the second clamping assembly 3. Gradually reduce the distance between the first clamping assembly 2 and the second clamping assembly 3 to initially make the clamping ring 5 press against the winding 4. At the same time, leave an insertion space for the wedge between the lower end face of the upper yoke and the winding 4. Insert the wedge block 6 to hold the clamping ring 5. While the clamping ring 5 further presses against the winding 4, the upper yoke is supported and pressed by the wedge block 6. The winding 4 and the upper yoke are always in a compressed state in the axial direction, effectively ensuring the stability of the winding 4 in the axial and radial directions, and further improving the stability of the overall structure of the transformer.

[0036] The first clamping assembly 2 includes: two upper clamping members 201 with the same structure, and the two upper clamping members 201 are symmetrically arranged on both sides of the upper yoke. The two upper clamping members 201 are connected by a plurality of first horizontal screws 202. The two ends of the first horizontal screw 202 are threadedly connected to first nuts. By rotating the first nuts in the positive direction, the two upper clamping members 201 approach each other to clamp the upper yoke, making the several yoke laminations in the upper yoke fit tightly together.

[0037] The second clamping assembly 3 includes: two lower clamping members 301 with the same structure, and the two lower clamping members 301 are symmetrically arranged on both sides of the lower yoke. The two lower clamping members 301 are connected by a plurality of second horizontal screws 302. The two ends of the second horizontal screw 302 are threadedly connected to second nuts. By rotating the second nuts in the positive direction, the two lower clamping members 301 approach each other to clamp the lower yoke, making the several yoke laminations in the lower yoke fit tightly together.

[0038] A plurality of reinforcing rib plates 7 are integrally arranged on the outer side surfaces of the upper clamping member 201 and the lower clamping member 301. Among them, the upper clamping member 201 and the lower clamping member 301 have the same structure. The upper clamping member 201 is integrally in a C shape, and the C-shaped opening faces away from the core 1. The upper end face, lower end face, and side surface of the reinforcing rib plate 7 are integrally connected to the upper clamping member 201. Similarly, the upper end face, lower end face, and side surface of the reinforcing rib plate 7 are integrally connected to the lower clamping member 301. The setting of the reinforcing rib plate 7 can effectively enhance the structural strength of the upper clamping member 201 and the lower clamping member 301.

[0039] The upper clamping piece 201 and the lower clamping piece 301 on the same side of the iron core 1 are connected by a number of vertical screw rods 8. The length direction of the vertical screw rods 8 is consistent with the length direction of the iron core 1, and the length direction of the vertical screw rods 8 is perpendicular to the length direction of the first horizontal screw rod 202 and the length direction of the second horizontal screw rod 302. Third nuts are threadedly connected to both ends of the vertical screw rods 8. By synchronously and positively screwing the third nuts on each vertical screw rod 8, the distance between the upper clamping piece 201 and the lower clamping piece 301 is reduced, thereby reducing the distance between the first clamping assembly 2 and the second clamping assembly 3. The first clamping assembly 2 and the second clamping assembly 3 play a role in limiting and fixing the winding 4 and the internal components.

[0040] As Figure 5 shown, a number of through holes are provided on the top surface of the pressing ring 5. The through holes are used for passing through the vertical screw rods 8. While locking the first clamping assembly 2 and the second clamping assembly 3, the vertical screw rods 8 can fix the position of the pressing ring in the radial direction, so that the winding 4 can be stably limited in both the axial direction and the radial direction, thereby resisting the deformation of the internal structure of the transformer and the vibration of the circuit.

[0041] In addition, an annular support plate 10 is provided above the second clamping assembly 3. A through limiting hole 502 is provided on the surface of the support plate 10. The limiting hole 502 is also used for passing through the vertical screw rods 8. Before installing the winding 4, the support plate 10 is first assembled above the lower clamping piece 301. The main function of the support plate 10 is to install the winding 4 and provide stable support for the winding 4.

[0042] It should be noted that the pressing ring 5 is of an integral structure. Preferably, the pressing ring 5 is integrally designed as a ring to adapt to the shape of the winding 4, so that the pressing ring 5 can be accurately docked and hold the winding 4. Similarly, according to actual needs, the pressing ring 5 can also be designed as a multi-piece split structure and other shaped structures. In addition, the pressing ring 5 is made of an epoxy resin glass fiber reinforced composite material, which can ensure the insulation strength and reliability of the pressing ring 5 itself.

[0043] Two limiting grooves 501 are provided on the inner peripheral side surface of the pressing ring 5. Among them, the limiting grooves 501 penetrate through the pressing ring 5. Two limiting blocks are provided on the outer peripheral side surface of the iron core 1. Each limiting groove 501 is snap-connected to a limiting block. Through the cooperation of the limiting groove 501 and the limiting block, the phenomenon of the pressing ring 5 shifting is prevented. In addition, the vertical screw rod 8 further prevents the pressing ring from shifting through cooperation with the limiting hole 502, thereby improving the stability of the pressing ring 5 and further enhancing the effect of resisting the deformation of the internal structure of the transformer and the vibration of the circuit. It should be noted that the limiting groove 501 can also be used for the lead wires of the winding 4 to pass through. In addition, a plurality of wire passing holes 503 are provided near the limiting groove 501, and the plurality of wire passing holes 503 are respectively used for various wires to pass through.

[0044] The top surface of the pressure ring 5 is provided with two guide grooves for the wedges 6. The two guide grooves for the wedges 6 are arranged in parallel. Each guide groove for the wedge 6 is snap-connected to a wedge 6. Among them, the two guide grooves for the wedges 6 are arranged on the bottom surface of the pressure ring 5. That is to say, the wedges 6 are inserted between the upper yoke and the winding 4 from the bottom surface of the pressure ring 5, so as to exert a downward pressure on the winding 4 and play a supporting role on the upper yoke.

[0045] As Figure 6 shown, the wedge 6 includes a top-holding part 601 and a connecting part 602 which are integrally arranged. Among them, the thickness of the top-holding part 601 is less than the thickness of the connecting part 602. That is to say, the cross-section of the wedge 6 adopts an L-shaped structure. The top-holding part 601 is used to hold the winding 4 and the upper yoke. A positioning hole is arranged on the connecting part 602, and a threaded hole is arranged on the pressure ring 5. A bolt passes through the positioning hole to fixedly connect the connecting part 602 and the pressure ring 5 together, and one end of the bolt is connected to the threaded hole. Preferably, the bolt and the nut are both made of epoxy resin fiberglass composite material to ensure the electrical insulation strength and reliability of the bolt and the nut themselves.

[0046] In addition, an adjusting gasket (not shown in the figure) is arranged on the top surface of the top-holding part 601. Preferably, the adjusting gasket is connected to the top surface of the top-holding part 601 by an adhesive method, or can also be connected to the top surface of the top-holding part 601 by a snap connection method. The connection form of the adjusting gasket is not limited. According to the reserved insertion operation space between the lower end surface of the upper yoke and the winding 4, adjusting gaskets of different thicknesses are selected. While ensuring that the wedge 6 and the adjusting gasket can enter the insertion operation space, the wedge 6 can achieve the best fixing effect on the upper yoke and the winding 4.

[0047] In the second embodiment of the present invention, the wedge 6 can also be designed as a T-shaped structure or a triangular structure. The main purpose is to strengthen the connection strength between the winding 4 and the upper yoke and ensure the stability of the overall structure of the transformer. In addition, the wedge 6 is made of epoxy resin fiberglass reinforced composite material, which can effectively ensure the electrical insulation strength and reliability of the wedge 6 itself.

[0048] It should be noted that an iron yoke insulation 9 is sleeved on the outer peripheral side of the core column. The iron yoke insulation 9 is integrally circular. The iron yoke insulation 9 is used to prevent the winding 4 from conducting electricity with the upper yoke and the lower yoke, ensuring the normal operation of the transformer. Further, the top surface of the top-holding part 601 abuts against the lower end surface of the upper yoke, the bottom surface of the top-holding part 601 abuts against the top surface of the iron yoke insulation 9, and the bottom surface of the top-holding part 601 is flush with the bottom surface of the pressure ring 5.

[0049] In an embodiment of the present utility model, one end of the jacking portion 601 is provided with a slope surface 603. The setting of the slope surface 603 can assist the jacking portion 601 to conveniently enter the insertion operation space reserved between the lower end surface of the upper yoke and the winding 4 in the early stage. At the same time, during the forward advancement of the jacking portion 601, the front end of the jacking portion 601 has a certain spreading force on the lower end surface of the winding 4 and the upper yoke, and can gradually jack the winding 4 and the upper yoke, which is more convenient for the overall forward advancement of the wedge block 6.

[0050] It should be noted that the inner peripheral side surface of the pressure ring 5 is as closely attached to the outer peripheral side surface of the upper yoke as possible. While ensuring that the winding 4 is stably limited in the axial direction by the pressure ring 5, the upper yoke can still be stably limited in the radial direction by the pressure ring 5, thereby assisting in limiting the winding 4 in the radial direction and further improving the stability of the overall structure of the transformer.

[0051] When the present utility model is in use, first fix the lower yoke through two lower clamping plates, lock the two lower clamping plates through the second horizontal screw 302, install the winding 4 on the upper surface of the support plate 10. At the same time, the winding 4 is coated on the outer peripheral side surface of the core column, install the upper yoke on the upper part of the winding 4, and then sleeved the pressure ring 5 from top to bottom on the outer peripheral side surface of the upper yoke. Further, install two upper clamping members 201. The two upper clamping members 201 are connected by the first horizontal screw 202 and fixed on both sides of the upper yoke. Connect the upper clamping member 201 and the lower clamping member 301 on the same side of the iron core 1 through a plurality of vertical screws 8. By screwing the third nut, gradually reduce the distance between the upper clamping member 201 and the lower clamping member 301, initially make the pressure ring 5 tightly press against the winding 4, and at the same time reserve an insertion operation space between the lower end surface of the upper yoke and the winding 4. Insert the wedge block 6 to jack the pressure ring 5. While the pressure ring 5 further tightly presses against the winding 4, the upper yoke is supported and tightly pressed by the wedge block 6. Among them, the upper end surface of the wedge block 6 is tightly pressed against the lower end surface of the upper yoke, and the lower end surface of the wedge block 6 is tightly pressed against the upper end surface of the winding 4. Through the cooperation of the wedge block 6 and the pressure ring 5, the winding 4 is always in a compressed state in the axial direction, effectively ensuring the stability of the winding 4 in the axial and radial directions to resist the deformation of the internal structure of the transformer and the vibration of the circuit, and improving the stability of the overall structure of the transformer.

[0052] In summary, by installing the pressure ring 5 and the wedge block 6 after the installation of the upper yoke is completed, replacing the traditional pressure ring, minimizing the size of the upper yoke and the upper end surface of the winding 4, while meeting the insulation distance requirements, reducing the overall axial size and weight of the transformer body, and reducing the oil tank space occupied by the transformer body, thereby meeting the requirements of the power system, especially the rail transit traction system, for the lightweight and miniaturization of the transformer.

[0053] It should be noted that in this specification, relational terms such as first and second are only used to distinguish one entity from several other entities, and do not necessarily require or imply any actual relationship or order between these entities.

[0054] In this article, specific examples are used to illustrate the principle and implementation mode of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model. It should be noted that for those of ordinary skill in the art of this technology, without departing from the principle of the present utility model, several improvements and modifications can be made to the present utility model, and these improvements and modifications also fall within the protection scope of the present utility model.

Claims

1. A transformer core, characterized in that, Comprising: A core, including a core column, an upper yoke and a lower yoke, the core column is arranged between the upper yoke and the lower yoke, and both ends of the core are respectively provided with a first clamping assembly and a second clamping assembly for fixing the core; A winding, which is coated and arranged on the outer side of the core column, and the winding is arranged between the first clamping assembly and the second clamping assembly; A pressure ring, which is arranged between the first clamping assembly and the winding, and a plurality of wedges are arranged on the bottom surface of the pressure ring, and the top surfaces of the plurality of wedges are all abutted against the lower end surface of the upper yoke.

2. A transformer body according to claim 1, characterized in that, The first clamping assembly includes: two upper clamping members, the two upper clamping members are symmetrically arranged on both sides of the upper yoke, and the two upper clamping members are connected by a plurality of first horizontal screw rods.

3. A transformer body according to claim 2, characterized in that, The second clamping assembly includes: two lower clamping members, the two lower clamping members are symmetrically arranged on both sides of the lower yoke, and the two lower clamping members are connected by a plurality of second horizontal screw rods.

4. A transformer body according to claim 3, characterized in that, A plurality of reinforcing rib plates are integrally arranged on the outer side surfaces of the upper clamping member and the lower clamping member respectively, and the reinforcing rib plates are respectively used to enhance the structural strength of the upper clamping member and the lower clamping member.

5. A transformer core according to claim 3, characterized in that, The upper clamping member and the lower clamping member on the same side of the core are connected by a plurality of vertical screw rods.

6. A transformer body according to claim 5, characterized in that, The pressure ring is in a ring shape, and a plurality of through holes are arranged on the top surface of the pressure ring, and the through holes are used for passing through the vertical screw rods.

7. A transformer core according to any one of claims 1-6, characterized in that, A plurality of limiting grooves are arranged on the inner peripheral side surface of the pressure ring, and a plurality of limiting blocks are arranged on the outer peripheral side surface of the core, and the limiting grooves are snap-connected to the limiting blocks.

8. A transformer body according to any one of claims 1-6, characterized in that, A plurality of wedge guiding grooves are arranged on the top surface of the pressure ring, and each wedge guiding groove is snap-connected to one of the wedges.

9. A transformer body according to claim 8, characterized in that, The wedge includes a top holding portion and a connecting portion which are integrally arranged, the top holding portion is used for holding the winding, and the connecting portion is connected to the pressure ring by bolts.

10. A transformer core according to claim 9, characterized in that, An iron yoke insulation is sleeved on the outer peripheral side surface of the core column, and the iron yoke insulation is integrally in a circular ring shape.

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