Large cylindrical coil winding die

Abstract

The utility model provides a large cylindrical coil winding die. The large cylindrical coil winding die comprises a base; the bearing assembly is coaxially and fixedly arranged at the axial center position of the base; the rotating shaft penetrates through the bearing assembly and forms rotating support, and the two ends of the rotating shaft extend to a die working area; the connecting seat is axially and fixedly connected to the rotating shaft; the supporting rods are circumferentially distributed in an annular array mode and detachably connected to the outer edge of the connecting base. The rotating shaft and the bearing assembly are arranged on the base, and the connecting base and the supporting rod are arranged on the rotating shaft, so that the inner wall of the transformer coil is supported, when the mold is not used, the connecting base and the bearing assembly can be disassembled only by pulling the rotating shaft away from the bearing assembly, and the mold is convenient and rapid to use; the problems that in the prior art, due to the fact that a rigid connecting base and a supporting rod are integrally designed in a welded mode, special storage space needs to be occupied during storage in a non-working state, special vehicles need to be arranged for transportation and turnover, and the site maintenance cost of manufacturing enterprises is increased are solved.

Description

Technical Field

[0001] This utility model relates to the technical field of transformer coil winding, and in particular to a large cylindrical coil winding mold. Background Technology

[0002] Transformer coil winding is the core process of transformer manufacturing. Its main functions include: forming a closed electromagnetic circuit by precisely arranging wires to realize the conversion of electrical energy and magnetic energy and voltage regulation; ensuring the insulation strength, heat dissipation efficiency and short-circuit resistance of the coil by layered winding, interlayer insulation arrangement and oil / air channel design, reducing the risk of partial discharge and temperature rise; and using dynamic adjustment molds and guiding mechanisms to control the coil layering accuracy and diameter consistency, improving mechanical stability to meet the needs of highly complex scenarios such as ultra-high voltage.

[0003] Large cylindrical coil winding is limited by the height of the coil, so horizontal winding is often used. When winding horizontally, the axial length of the mold is not limited by the height, which is suitable for ultra-long or large-diameter coils (such as converter transformer coils). The winding machine can perform multi-axis linkage winding simultaneously.

[0004] However, the existing large cylindrical coil winding molds cannot adapt to the winding of transformer coils of different diameters. At the same time, the rigid connecting seat and the support rod adopt an integrated welding design, which requires dedicated storage space when not in operation and special vehicles are required for transportation and turnover, significantly increasing the site maintenance costs of manufacturing enterprises. Utility Model Content

[0005] The purpose of this invention is to solve the problem in the prior art where the rigid connecting seat and the support rod are designed as a welded integrated unit, which requires dedicated storage space when not in operation and special vehicles for transportation and turnover, significantly increasing the site maintenance costs for manufacturing enterprises.

[0006] To achieve the above objectives, this application proposes a large cylindrical coil winding mold, comprising:

[0007] Base;

[0008] The bearing assembly is coaxially fixed at the axial center position of the base;

[0009] A rotating shaft passes through the bearing assembly and forms a rotational support, with both ends of the rotating shaft extending into the working area of ​​the mold.

[0010] The connecting seat is axially fixed to the rotating shaft;

[0011] Support rods are circumferentially distributed in a ring array and detachably connected to the outer edge of the connector.

[0012] The large cylindrical coil winding mold of this application supports the inner wall of the transformer coil by setting a rotating shaft and bearing assembly on the base, and setting a connecting seat and support rod on the rotating shaft. When the mold is not in use, the connecting seat and bearing assembly can be disassembled simply by pulling the rotating shaft away from the bearing assembly, which is convenient and quick. This solves the problem in the prior art where the rigid connecting seat and support rod are designed as a welded integrated unit, which requires dedicated storage space when not in operation and special vehicles for transportation and turnover, significantly increasing the site maintenance costs of manufacturing enterprises.

[0013] Furthermore, in order to achieve fine-tuning of the mold, an adjusting bolt is provided at the free end of the support rod. The axis of the adjusting bolt coincides with the axis of the support rod, and the axial position of the support rod can be finely adjusted by rotation.

[0014] Furthermore, in order to raise the base to accommodate coils of different diameters, a telescopic mechanism is provided between the base and the connecting seat.

[0015] Furthermore, in order to enable the rotation of the shaft, the bearing assembly includes: a bearing mounted on the shaft, a bearing housing connecting the bearing and the base, and cover plates disposed on the two side walls of the bearing housing.

[0016] Furthermore, in order to increase the stability of the connector installation and to fix the support rod, the connector includes: a limiting part that covers the rotating shaft with an interference fit; and a connecting part that is coaxially fixed to the limiting part and extends radially, with bolt mounting holes arranged in a ring array on its outer edge.

[0017] Furthermore, in order to achieve synchronous rotation between the connecting seat and the rotating shaft, the limiting part and the rotating shaft are circumferentially positioned by a flat key. The flat key is embedded in the mating space formed by the keyway opened on the inner wall of the limiting part and the axial keyway set at the corresponding position of the rotating shaft.

[0018] Furthermore, the support rod is detachably connected to the connecting seat in the following manner: a through bolt hole is opened on the end face of the connecting part of the connecting seat; a U-shaped groove is provided at the connecting end of the support rod, the width of the U-shaped groove is adapted to the thickness of the connecting part, and axial locking is achieved by fastening bolts that pass through the bolt hole and penetrate the side wall of the U-shaped groove.

[0019] Furthermore, the axis of the adjusting bolt coincides with the axis of the support rod, and the axial position of the support rod can be finely adjusted by rotation.

[0020] The beneficial effects of this application are as follows:

[0021] 1. The large cylindrical coil winding mold of this application supports the inner wall of the transformer coil by setting a rotating shaft and bearing assembly on the base, and setting a connecting seat and support rod on the rotating shaft. When the mold is not in use, the connecting seat and bearing assembly can be disassembled simply by removing the rotating shaft from the bearing assembly, which is convenient and quick. This solves the problem in the prior art that the rigid connecting seat and support rod adopt a welded integrated design, which requires dedicated storage space when not in operation and special vehicles for transportation and turnover, significantly increasing the site maintenance costs of manufacturing enterprises.

[0022] 2. The support rod of this application is provided with an adjusting bolt at the end, which can make fine adjustments to the inner wall of the coil 7. At the same time, the base is configured as a telescopic structure. When facing transformer coils of different diameters, the height of the transformer coil can be adjusted by raising or lowering the base, so as to avoid the coil from contacting the ground and keep the working plane at the optimal working height.

[0023] 3. The bearing assembly of this application provides support for the rotating shaft. The cover plates on both sides of the bearing housing enable quick positioning of the bearing when it is installed on the bearing housing, while also supporting the bearing and preventing it from falling off the bearing housing.

[0024] 4. The connecting seat of this application is provided with a limiting part, which can cooperate with the flat key to realize the synchronous rotation of the connecting seat and the rotating shaft, and at the same time enhance the installation stability between the connecting seat and the rotating shaft. The bolt mounting holes provided on the connecting part can realize the quick assembly and disassembly of the support rod. The connecting end of the support rod is provided with a U-shaped groove, which can increase the installation stability of the support rod. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of a large cylindrical coil winding mold in an embodiment of this application;

[0027] Figure 2 This is a structural schematic diagram of a large cylindrical coil winding mold from another perspective in an embodiment of this application.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1. Base; 11. Telescopic mechanism;

[0030] 2. Bearing assembly; 21. Bearing; 22. Bearing housing; 23. Cover plate;

[0031] 3. Shaft; 31a. Flat key;

[0032] 4. Connecting seat; 41. Limiting part; 411. Keyway; 42. Connecting part; 43. Bolt hole;

[0033] 5. Support rod; 51. U-shaped slot; 52. Fastening bolt;

[0034] 6. Adjusting bolts;

[0035] 7. Coil. Detailed Implementation

[0036] The following will be combined with the appendix Figures 1-2 The embodiments of the technical solutions of this application are described in detail below. The following embodiments are only used to more clearly illustrate the technical solutions of this application, and are therefore merely examples and should not be used to limit the scope of protection of this application. Furthermore, the technical features involved in the various embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0037] Example 1:

[0038] like Figures 1-2 This invention illustrates a large cylindrical coil winding mold. In order to achieve convenient storage and transportation through a detachable support structure, this embodiment addresses the problem of high storage and transportation costs caused by the integral welding of the rigid connecting seat 4 and the support rod 5 in the prior art. It achieves rapid assembly and disassembly through modular design.

[0039] Specifically, the support rod 5 is detachably connected to the connecting part 42 of the connecting seat 4 via the U-shaped slot 51:

[0040] Through bolt holes 43 are provided on the end face of the connecting part 42 of the connecting seat 4, and the bolt holes 43 are evenly distributed in the radial direction;

[0041] A U-shaped groove 51 is provided at the connecting end of the support rod 5, and the width of the groove is precisely matched with the thickness of the connecting part 42.

[0042] The support rod 5 is axially locked by fastening bolt 52 through bolt hole 43 and U-shaped groove 51 side wall.

[0043] Meanwhile, the cover plates 23 on both sides of the bearing housing 22 can quickly position the bearing 21 when it is installed on the bearing housing 22, and support the bearing 21 to prevent it from falling off the bearing housing 22.

[0044] In the non-working state, simply loosening the fastening bolts 52 allows the support rod 5 to be removed from the connecting seat 4, and simultaneously the rotating shaft 3 can be detached from the bearing assembly 2, allowing the mold to disassemble into independent modules such as the base 1, bearing assembly 2, rotating shaft 3, connecting seat 4, and support rod 5. These modules can be stacked for storage, reducing the required storage space and eliminating the need for special vehicles during transportation, significantly lowering site maintenance costs.

[0045] Example 2:

[0046] like Figures 1-2 This illustration depicts a large cylindrical coil winding mold according to this application. To achieve precise control of the inner wall support of the coil 7 via the adjusting bolt 6, this embodiment addresses dimensional deviations caused by thermal expansion and contraction or fluctuations in wire tension during the large coil winding process. Axial fine-tuning is achieved through the adjusting bolt 6 at the free end of the support rod 5. The axis of the adjusting bolt 6 coincides with the axis of the support rod 5, and its threaded section engages with the internal threaded hole at the end of the support rod 5. When the adjusting bolt 6 is rotated, its axial displacement is transmitted through the following path:

[0047] The thread engagement depth of adjusting bolt 6 changes, thereby altering the length of adjusting bolt 6 protruding from the end of support rod 5;

[0048] The bolt end pushes against the inner wall of coil 7;

[0049] Adjust the overall axial position of support rod 5.

[0050] This structure allows for an axial adjustment of 5±5mm for a single support rod. When multiple support rods 5 are adjusted in tandem, the coil inner diameter error can be controlled within ±0.5mm, significantly improving winding accuracy and interlayer insulation reliability.

[0051] Example 3:

[0052] like Figures 1-2 This illustration depicts a large cylindrical coil winding mold according to this application. To accommodate the winding requirements of transformer coils with different diameters, this embodiment includes a telescopic mechanism 11 between the base 1 and the connecting seat 4. The telescopic mechanism 11 employs a combination structure of a hydraulic cylinder and a guide column.

[0053] The hydraulic cylinder body is fixed to the upper surface of the base 1, and the piston rod end is hinged to the lower surface of the connecting seat 4;

[0054] The guide columns are symmetrically arranged on both sides of the hydraulic cylinder, and their two ends are connected to the base 1 and the connecting seat 4 respectively through ball joints.

[0055] When the coil diameter changes, the piston rod is extended or retracted via the hydraulic system, causing the connecting seat 4 to rise or fall axially along the rotating shaft 3, thus achieving stepless adjustment of the mold's working height. Tests show that this structure can extend the mold's adaptable diameter range to φ800mm~φ3000mm, and the coaxiality deviation of the rotating shaft 3 during height adjustment is ≤0.02mm.

[0056] Example 4:

[0057] like Figures 1-2 This invention illustrates a large cylindrical coil winding mold. To ensure the rotational accuracy of the shaft 3 during high-speed winding, this embodiment employs a combination structure of a double-row tapered roller bearing 21 and a bearing housing 22.

[0058] The bearing housing 22 is fixedly connected to the base 1 by a stop, and its inner cavity is interference-fitted with the outer ring of the bearing 21.

[0059] The cover plate 23 is fixed to both sides of the bearing housing 22 by bolts, forming a closed mounting cavity;

[0060] The rotating shaft 3 passes through the inner ring of the bearing 21 and is axially positioned by the shaft shoulder and the round nut.

[0061] This structure ensures that the radial runout of the rotating shaft 3 is ≤0.01mm and the axial runout is ≤0.005mm, meeting the coaxiality requirement of ±0.02mm when winding the coil of an ultra-high voltage transformer.

[0062] Furthermore, to solve the torque transmission problem between the connecting seat 4 and the rotating shaft 3, this embodiment uses a flat key 31a to achieve circumferential positioning:

[0063] An axial keyway is machined on the surface of shaft 3, with a keyway depth of 1 / 8 of the shaft diameter;

[0064] A corresponding keyway 411 is formed on the inner wall of the limiting part 41 of the connector 4;

[0065] The mating space formed by the keyway 31a embedded in the keyway 411 and the axial keyway of the shaft 3 is controlled with an interference fit of 0.01~0.03mm.

[0066] This structure enables the torque transmission efficiency between the connecting seat 4 and the rotating shaft 3 to reach over 98%, and during disassembly and assembly, it can be quickly separated by simply tapping the flat key 31a, avoiding the defects of traditional welded structures that require destructive disassembly.

[0067] Furthermore, to improve the connection reliability between the support rod 5 and the connecting seat 4, this embodiment adopts a combination structure of U-shaped groove 51 and bolt hole 43:

[0068] The opening width of the U-shaped slot 51 is 0.1~0.2mm wider than the thickness of the connecting part 42, forming an interference fit;

[0069] Fastening bolt 52 adopts a double nut anti-loosening structure, and the pre-tightening torque is controlled at 15~20 N·m;

[0070] When the support rod 5 is under force, the shear force is evenly transmitted to the connecting part 42 through the two side walls of the U-shaped groove 51.

[0071] In the description of the embodiments of this application, the technical terms "upper", "lower", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and 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 embodiments of this application.

[0072] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "set," "equipped with," "connected," and "installed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0073] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A large cylindrical coil winding mold, characterized in that, include: Base (1); The bearing assembly (2) is coaxially fixed at the axial center position of the base (1); A rotating shaft (3) passes through the bearing assembly (2) and forms a rotational support, with both ends of the rotating shaft (3) extending to the working area of ​​the mold; The connecting seat (4) is axially fixed to the rotating shaft (3); The support rods (5) are circumferentially distributed in a ring array and detachably connected to the outer edge of the connecting seat (4).

2. The large cylindrical coil winding mold according to claim 1, characterized in that, The free end of the support rod (5) is provided with an adjusting bolt (6), the axis of which coincides with the axis of the support rod (5). The axial position of the support rod (5) can be finely adjusted by rotation.

3. The large cylindrical coil winding mold according to claim 1, characterized in that, A telescopic mechanism (11) is provided between the base (1) and the connecting seat (4).

4. The large cylindrical coil winding mold according to claim 1, characterized in that, The bearing assembly (2) includes: a bearing (21) fitted on the shaft (3), a bearing seat (22) connecting the bearing (21) and the base (1), and cover plates (23) disposed on the two side walls of the bearing seat (22).

5. The large cylindrical coil winding mold according to claim 1, characterized in that, The connector (4) includes: The limiting part (41) covers the rotating shaft (3) in an interference fit manner. The connecting part (42) is coaxially fixed to the limiting part (41) and extends radially, and its outer edge is provided with bolt mounting holes arranged in an annular array.

6. The large cylindrical coil winding mold according to claim 5, characterized in that, The limiting part (41) and the rotating shaft (3) are circumferentially positioned by a flat key (31a). The flat key (31a) is embedded in the mating space formed by the keyway (411) opened on the inner wall of the limiting part (41) and the axial keyway set at the corresponding position of the rotating shaft (3).

7. The large cylindrical coil winding mold according to claim 1, characterized in that, The support rod (5) is detachably connected to the connecting seat (4) in the following manner: A through bolt hole (43) is provided on the end face of the connecting part (42) of the connecting seat (4); A U-shaped groove (51) is provided at the connecting end of the support rod (5), and the width of the U-shaped groove (51) is adapted to the thickness of the connecting part (42); Axial locking is achieved by fastening bolts (52) that pass through bolt holes (43) and through the sidewalls of U-shaped grooves (51).

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