Double-decker coil winding device and winding method

Abstract

The application belongs to the technical field of coil assembly, and discloses a double-cake coil winding device and a winding method. The device comprises a back plate, a first spool, a second spool, a first winding disc and a second winding disc. A framework is arranged on the back plate, and the outer wall of the framework forms a winding area. An insulating plate separates the winding area into a first winding area and a second winding area, and the insulating plate is provided with a crack. The first spool passes through the back plate and the framework. The second spool is arranged outside the back plate and can rotate. The first winding disc has a first state and a second state. The second winding disc is sleeved on the second spool. When the first winding disc is in the first state, the second winding disc is removed, and the first winding disc is in the second state. The first spool drives the back plate, the framework and the first winding disc to rotate synchronously. Part of the wire is wound on the first winding disc, and the other part is wound on the second winding disc through the crack. Through the application, a single wire can be wound into a double-cake coil, the shape stability of the coil winding is improved, and wire disconnection is avoided.

Description

Technical Field

[0001] This invention relates to the field of coil assembly technology, and more particularly to a double-pancake coil winding device and winding method. Background Technology

[0002] Superconducting materials, also known as superconductors, are conductors with zero resistance at a certain temperature. The zero-resistance characteristic of superconducting materials makes them extremely promising for applications in the power industry. For example, superconducting coils made from superconducting materials, when used in high magnetic field and high current environments, exhibit advantages such as high efficiency, low loss, high current density, and large irreversible field, thus significantly reducing losses.

[0003] In the field of motor applications, the winding of a single racetrack coil is relatively simple, but with the development of electromagnetic technology, double-disc racetrack coils have been widely used.

[0004] When winding existing double-pane coils, it is difficult to wind a single wire into a double-pane coil, and the shape of the coil is not stable enough, making it easy for the wire to come loose. Summary of the Invention

[0005] The purpose of this invention is to provide a double-panel coil winding device and winding method, which facilitates the winding of a single wire to form a double-panel coil, while improving the stability of the shape of the double-panel coil after winding and avoiding delamination.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A double-pancake coil winding device includes:

[0008] A back plate is provided with a skeleton, the outer wall of which forms a winding area. An insulating plate is fitted along the outer wall of the skeleton, dividing the winding area into a first winding area away from the back plate and a second winding area closer to the back plate. The second winding area is formed by a gap between the insulating plate and the back plate. Slits are provided on the insulating plate to allow wires to pass through.

[0009] A first spool passes through the back plate and the skeleton;

[0010] The second spool is located outside the back plate and parallel to the first spool;

[0011] The first winding spool has a first state in which it is sleeved on the side of the first spool near the skeleton, and a second state in which it is sleeved on the second spool.

[0012] When the second winding reel is sleeved on the second spool, the first winding reel is in the first state; when the second winding reel is removed from the second spool, the first winding reel is in the second state; the first spool is used to drive the back plate, the skeleton and the first winding reel to rotate synchronously; a portion of the wire is wound on the first winding reel, and another portion passes through the crack and is wound on the second winding reel.

[0013] According to the double-pancake coil winding device, the back plate is provided with a limiting groove, and a limiting block is protruding from one side of the frame, the limiting block being disposed in the limiting groove.

[0014] As an alternative to a double-pancake coil winding device, a limiting platform is provided in the first winding area along the circumference of the skeleton, and the limiting platform protrudes outward along the outer wall of the skeleton.

[0015] As an alternative to the double-panel coil winding device, a transition block is connected to the side of the frame away from the back plate. The shape of the outer side wall of the transition block is the same as the shape of the side wall of the frame. The wire led out from the first winding disc can be wound around the outer side wall of the transition block and wound on the first winding area.

[0016] As an alternative to a double-pancake coil winding device, a spacer is fitted on the first spool, with one end of the spacer abutting against the transition block and the other end abutting against one end face of the first winding disc.

[0017] As an alternative to the double-disc coil winding device, the other end face of the first winding disc can be locked by a first nut, which is screwed into the first bobbin.

[0018] As an alternative to a double-panel coil winding device, the frame is fixed to the back plate by a plurality of threaded fasteners.

[0019] As an alternative to a double-disc coil winding device, a second nut is screwed onto the second spool, the second nut being used to lock the first winding disc or the second winding disc onto the second spool.

[0020] As an alternative to a double-pancake coil winding device, the frame is racetrack-shaped.

[0021] The winding method, based on the double-pancake coil winding device as described in any of the above schemes, includes:

[0022] The first winding reel is fixed on the first bobbin, and the second winding reel is fixed on the second bobbin;

[0023] A portion of the wire is wound onto the first winding spool, and another portion of the wire passes through the crack and is wound onto the second winding spool;

[0024] Rotate the first spool and the second spool so that the wire of the second winding reel is wound on the second winding area;

[0025] Remove the first winding reel and the second winding reel respectively, fix the first winding reel on the second spool, and rotate the first spool and the second spool so that the wire of the first winding reel is wound on the first winding area.

[0026] Beneficial effects:

[0027] In the first aspect of the invention, a winding area for winding wire is formed on the circumferential outer wall of the skeleton. An insulating plate separates the circumferential outer wall of the skeleton into a first winding area and a second winding area, forming a double-pancake-shaped winding partition. The first and second winding areas divide the winding area into two equal parts. In order to allow the wire to be wound on both sides through the insulating plate, a slit is provided in the insulating plate for the wire to pass through. The slit connects the inner and outer walls of the insulating plate. The back plate and the skeleton are fixed by a first bobbin to ensure that the back plate and the skeleton can rotate synchronously with the first bobbin. In addition, the second bobbin can rotate on its own axis and can drive the first winding disc or the second winding disc. First, fix the first winding reel to the first bobbin and the second winding reel to the second bobbin. Simultaneously drive the first and second bobbins to rotate synchronously. The wire on the second winding reel will gradually wind onto the second winding area of ​​the bobbin. Since the second winding area is formed by the gap between the back plate and the insulating plate, the wire is always axially limited during winding, ensuring stable winding without loosening. Next, remove the second winding reel and fix the first winding reel to the second bobbin. The first and second bobbins rotate synchronously. At this time, the wire located on the first winding reel will be wrapped in the first winding area. After the wire is evenly distributed on the first and second winding reels, by controlling the number of turns, the two sides of the winding section of the skeleton can be evenly wound, thus forming a double-pancake coil. When the wire is wound in the first winding area, the insulating plate also plays an axial limiting role, ensuring that the wire in the first winding area can be wound stably and will not come loose. This device can easily realize the winding of a single wire to form a double-pancake coil.

[0028] In a second aspect of the invention, the method based on this device can effectively improve the winding stability of the double-pancake coil and prevent loosening during the winding process. Attached Figure Description

[0029] Figure 1 This is a partial structural schematic diagram of the double-pancake coil winding device provided in an embodiment of the present invention;

[0030] Figure 2 This is a schematic diagram of the assembly of the various components of the first bobbin provided in an embodiment of the present invention;

[0031] Figure 3 This is a side view of the frame and insulating plate assembly provided in an embodiment of the present invention;

[0032] Figure 4 This is a schematic diagram of the structure of the back plate provided in an embodiment of the present invention;

[0033] Figure 5 This is a schematic diagram of the skeleton provided in an embodiment of the present invention;

[0034] Figure 6 This is a side view of the skeleton provided in an embodiment of the present invention;

[0035] Figure 7 This is a schematic diagram of the structure of the skeleton, the first spool, and the back plate provided in an embodiment of the present invention;

[0036] Figure 8 yes Figure 2 Schematic diagram of the structure of the hidden insulating plate;

[0037] Figure 9 This is a schematic diagram of the initial winding of the wire in the first winding area and the second winding area according to an embodiment of the present invention;

[0038] Figure 10 This is a schematic diagram of a portion of the wire provided in an embodiment of the present invention being wound around a transition block for pre-tensioning;

[0039] Figure 11 This is a schematic diagram of an embodiment of the present invention showing a completed wire wound in the second winding area to form a single-panel coil;

[0040] Figure 12 This is a schematic diagram of a double-pancake coil formed by winding a wire in the first winding area, according to an embodiment of the present invention.

[0041] In the picture:

[0042] 1. Back plate; 11. Limiting groove; 2. Frame; 21. First winding area; 211. Limiting platform; 22. Second winding area; 23. Limiting block; 3. Insulating plate; 31. Crack; 4. First spool; 41. Spacer; 42. First nut; 5. Second spool; 51. Second nut; 6. First winding reel; 7. Second winding reel; 8. Transition block; 9. Threaded fastener. Detailed Implementation

[0043] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0044] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" 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 mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0045] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the 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 the 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" the 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.

[0046] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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 present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0047] Please see the appendix Figure 1 -Appendix Figure 3The first aspect of this embodiment relates to a double-pancake coil winding device (hereinafter referred to as the "device"), which includes a back plate 1, a first bobbin 4, a second bobbin 5, a first winding disc 6, and a second winding disc 7. A frame 2 is provided on the back plate 1. The outer wall of the frame 2 forms a winding area. An insulating plate 3 is fitted along the outer wall of the frame 2. The insulating plate 3 divides the winding area into a first winding area 21 away from the back plate 1 and a second winding area 22 close to the back plate 1. A slit 31 is provided on the insulating plate 3 for the wire to pass through. A first spool 4 passes through the back plate 1 and the frame 2. A second spool 5 is located outside the back plate 1 and parallel to the first spool. A first winding disc 6 has a first state in which it is fitted on the side of the first spool 4 close to the frame 2, and a second state in which it is fitted on the second spool 5. When the second winding disc 7 is fitted on the second spool 5, the first winding disc 6 is in the first state. When the second winding disc 7 is removed from the second spool 5, the first winding disc 6 is in the second state. The first spool 4 is used to drive the back plate 1, the frame 2 and the first winding disc 6 to rotate synchronously. A part of the wire is wound on the first winding disc 6, and another part passes through the slit 31 and is wound on the second winding disc 7.

[0048] In this embodiment, the back plate 1 is used to position the frame 2. The frame 2 is a racetrack-shaped structure and a plate-shaped component. A winding area for winding wire is formed on the circumferential outer wall of the frame 2. By fitting the insulating plate 3 onto the outer wall of the frame, the circumferential outer wall of the frame 2 is separated into a first winding area 21 and a second winding area 22, forming a double-pancake-shaped winding partition. The first winding area 21 and the second winding area 22 divide the winding area into two equal parts. In order for the wire to be wound on both sides through the insulating plate 3, a slit 31 is provided on the insulating plate 3 for the wire to pass through. The insulating plate 3 is also a racetrack-shaped structure. The slit 31 connects the inner wall and the outer wall of the insulating plate 3. The width of the slit 31 should be sufficient to ensure that the wire can pass through without damage. This embodiment does not make a specific limitation. In addition, the slit 31 is inclined relative to the circumferential direction of the insulating plate 3. Furthermore, mounting holes are provided on both the back plate 1 and the frame 2. By allowing the first spool 4 to pass through the mounting holes, it is ensured that the back plate 1 and the frame 2 can rotate synchronously with the first spool 4. One end of the first spool 4 is connected to the drive device, and the other end can be connected to the first winding disc 6. The second spool 5 is independent of the back plate 1 and can be set on other structures of this device. The second spool 5 is arranged parallel to the first spool 4 and can rotate on its own. The second spool 5 can be fitted with the first winding disc 6 or the second winding disc 7.

[0049] The working principle of this device is as follows: First, the first winding reel 6 is fixed to the first bobbin 4, and the second winding reel 7 is fixed to the second bobbin 5. Simultaneously, the first bobbin 4 and the second bobbin 5 are driven to rotate synchronously. At this time, the wire on the second winding reel 7 will gradually wind onto the second winding area 22 of the frame 2. Since the second winding area 22 is formed by the gap between the back plate 1 and the insulating plate 3, the wire is always axially limited during the winding process, ensuring that the wire in the second winding area 22 can be stably wound without loosening. Further, the second winding reel 7 is removed, and the first winding reel 6 is fixed. On the second spool 5, the first spool 4 and the second spool 5 are driven to rotate synchronously again. At this time, the wire located on the first winding disc 6 will be sleeved in the first winding area 21. After the wire is evenly distributed on the first winding disc 6 and the second winding disc 7, by controlling the number of turns, it is possible to achieve that both sides of the winding section of the skeleton 2 are evenly wound, thereby forming a double-pancake coil. When the wire is wound on the first winding area 21, the insulating plate 3 also plays the role of axial limiting, ensuring that the wire in the first winding area 21 can be wound stably and not loosen. This device can easily realize the winding of a single wire to form a double-pancake coil.

[0050] Please see the appendix Figure 4 -Appendix Figure 7 Optionally, the back plate 1 is provided with a limiting groove 11, and a limiting block 23 protrudes from one side of the frame 2, with the limiting block 23 located in the limiting groove 11.

[0051] In this embodiment, the limiting groove 11 is a strip structure, and the limiting block 23 is also a strip structure. The positioning of the skeleton 2 relative to the back plate 1 is achieved by the cooperation of the limiting block 23 and the limiting groove 11.

[0052] Optionally, a limiting platform 211 is provided in the first winding area 21 along the circumference of the skeleton 2, and the limiting platform 211 protrudes outward along the outer wall of the skeleton 2.

[0053] In this embodiment, the plane of one side wall of the limiting platform 211 is coplanar with the plane of the side wall of the frame 2 away from the insulating plate 3. The thickness of the limiting platform 211 is small, and a small groove is formed between the limiting platform 211 and the insulating plate 3. This can ensure that when the wire is wound in the first winding area 21, the first layer in the axial direction is effectively limited, ensuring that the first layer of wire wound in the first winding area 21 does not fall off.

[0054] Please refer to the appendix for further details. Figure 1 Appendix Figure 2 and attached Figure 8 Furthermore, a transition block 8 is connected to the side of the frame 2 away from the back plate 1. The shape of the outer wall of the transition block 8 is the same as the shape of the side wall of the frame 2. The wire led out by the first winding disc 6 can be wound on the outer wall of the transition block 8 and wound on the first winding area 21.

[0055] In this embodiment, the transition block 8 has a large thickness. The wire led out from the first winding disc 6 is first wound around the transition block 8 several times, thereby providing sufficient preload force to the wire during the winding process of the first winding area 21 and the second winding area 22, ensuring that the bottom wire of the first winding area 21 and the second winding area 22 remains taut, and improving the stability of the double-panel coil.

[0056] Optionally, a spacer 41 is fitted on the first spool 4, with one end of the spacer 41 abutting against the transition block 8 and the other end abutting against one end face of the first winding reel 6.

[0057] In this embodiment, the spacer 41 is sleeve-shaped and is fitted onto the first bobbin 4 to ensure the distance between the first winding reel 6 and the transition block 8. Those skilled in the art can adjust the length of the spacer 41 to arrange the first winding reel 6 in an appropriate position.

[0058] Furthermore, the other end face of the first winding reel 6 can be locked by the first nut 42, which is screwed into the first spool 4.

[0059] In this embodiment, the axial position of the first winding reel 6 is completely fixed by screwing the first nut 42 to the first bobbin 4. The first nut 42 is used to tighten and lock the winding reel 6. The locking method is simple and reliable, and it is also convenient to disassemble the first winding reel 6.

[0060] Optionally, a second nut 51 is screwed onto the second spool 5, the second nut 51 being used to lock the first winding reel 6 or the second winding reel 7 onto the second spool 5.

[0061] Similarly, the first winding reel 6 or the second winding reel 7 can be locked onto the second spool 5 by means of the second nut 51. The locking method is simple and reliable, and it is also convenient to disassemble the first winding reel 6 or the second winding reel 7.

[0062] Optionally, the frame 2 and the back plate 1 are secured by a plurality of threaded fasteners 9.

[0063] In this embodiment, two connecting holes are respectively opened on the frame 2 and the back plate 1. Bolts are passed through the connecting holes in sequence and locked with nuts. The fixing method is simple and reliable.

[0064] Please continue to refer to the appendix. Figure 9 -Appendix Figure 12 The second aspect of this embodiment also relates to a winding method, which is based on the above-described apparatus and specifically includes the following steps:

[0065] S1. Part of the wire is wrapped around the first winding spool 6, and the other part of the wire passes through the crack 31 and is wound around the second winding spool 7.

[0066] First, a whole strip of wire is divided into two parts and wound onto the first winding spool 6 and the second winding spool 7 respectively, so that the middle part of the wire passes through the crack 31. The wire of the first winding spool 6 is used to wind onto the first winding area 21, and the wire of the second winding spool 7 is used to wind onto the second winding area 22. A portion of the wire drawn from the first winding spool 6 is wound around the transition block 8 several times to provide initial preload and effectively prevent loosening during winding.

[0067] S2. The first winding disc 6 is fixed on the first bobbin 4, and the second winding disc 7 is fixed on the second bobbin 5.

[0068] First, the first winding reel 6 is placed on the first bobbin 4 and axially locked by the first nut 42. Then, the second winding reel 7 is placed on the second bobbin 5 and axially locked by the second nut 51.

[0069] S3. Rotate the first spool 4 and the second spool 5 so that the wire of the second winding reel 7 is wound on the second winding area 22.

[0070] The first spool 4 and the second spool 5 are driven to rotate by the driving component. During the rotation, since the back plate 1, the frame 2 and the first winding reel 6 rotate synchronously and coaxially with the first spool 4, the wire on the first winding reel 6 is not temporarily involved in winding. The second winding reel 7 rotates with the second spool 5. At this time, the wire on the second winding reel 7 will gradually be wound on the second winding area 22. When the winding wire in the second winding area 22 has reached the design requirements, the driving component stops working and proceeds to the next step.

[0071] S4. Remove the first winding reel 6 and the second winding reel 7 respectively, fix the first winding reel 6 on the second spool 5, and rotate the first spool 4 and the second spool 5 so that the wire of the first winding reel 6 is wound on the first winding area 21.

[0072] By disassembling the first nut 42 and the second nut 51, and removing the first winding reel 6 and the second winding reel 7 respectively, if there is any remaining wire on the second winding reel 7 before removing it, the wire needs to be cut and the free end of the wire fixed to the back plate 1. Further, the first winding reel 6 is sleeved on the second spool 5, and the first winding reel 6 is axially locked by the second nut 51. The first spool 4 and the second spool 5 are driven continuously. At this time, the wire on the first winding reel 6 will be gradually wound on the first winding area 21. When the winding wire in the first winding area 21 has reached the design requirements, the driving component stops working, and the winding of the double-pancake coil is completed.

[0073] This method based on the device can effectively improve the winding stability of the double-pancake coil and prevent it from loosening during the winding process.

[0074] 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 will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. 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 double-disc type coil winding device, characterized in that, include: A back plate (1) is provided with a frame (2). The outer wall of the frame (2) forms a winding area. An insulating plate (3) is sleeved along the outer wall of the frame (2). The insulating plate (3) divides the winding area into a first winding area (21) away from the back plate (1) and a second winding area (22) close to the back plate (1). The second winding area (22) is formed by the gap between the insulating plate (3) and the back plate (1). A slit (31) is provided on the insulating plate (3) for the wire to pass through. The first spool (4) passes through the back plate (1) and the skeleton (2); The second spool (5) is located outside the back plate (1) and parallel to the first spool (4); The first winding spool (6) has a first state in which it is sleeved on the side of the first spool (4) near the skeleton (2), and a second state in which it is sleeved on the second spool (5). The second winding spool (7) is in the first state when it is sleeved on the second spool (5); the first winding spool (6) is in the second state when it is removed from the second spool (5); the first spool (4) is used to drive the back plate (1), the skeleton (2) and the first winding spool (6) to rotate synchronously; a part of the wire is wound on the first winding spool (6) and the other part passes through the crack (31) and is wound on the second winding spool (7).

2. The double-disc coil winding device according to claim 1, characterized in that, The back plate (1) is provided with a limiting groove (11), and a limiting block (23) protrudes from one side of the frame (2), and the limiting block (23) is located in the limiting groove (11).

3. The double-disc coil winding device according to claim 1, characterized in that, A limiting platform (211) is provided in the first winding area (21) along the circumference of the skeleton (2), and the limiting platform (211) protrudes outward along the outer wall of the skeleton (2).

4. The double-disc coil winding device according to claim 3, characterized in that, The frame (2) is connected to a transition block (8) on the side away from the back plate (1). The shape of the outer side wall of the transition block (8) is the same as the shape of the side wall of the frame (2). The wire led out from the first winding disc (6) can be wound around the outer side wall of the transition block (8) and wound on the first winding area (21).

5. The double-disc coil winding device according to claim 4, characterized in that, A spacer (41) is fitted on the first spool (4). One end of the spacer (41) abuts against the transition block (8), and the other end abuts against one end face of the first winding disc (6).

6. The double-disc coil winding device according to claim 5, characterized in that, The other end face of the first winding spool (6) can be locked by the first nut (42), which is screwed into the first spool (4).

7. The double-disc coil winding device according to claim 1, characterized in that, The frame (2) is fixed to the back plate (1) by a plurality of threaded fasteners (9).

8. The double-disc coil winding device according to claim 1, characterized in that, A second nut (51) is screwed onto the second spool (5), and the second nut (51) is used to lock the first winding spool (6) or the second winding spool (7) onto the second spool (5).

9. The double-disc coil winding device according to claim 1, characterized in that, The frame (2) is runway shaped.

10. A winding method, characterized in that, The double-pancake coil winding device according to any one of claims 1-9 includes: The first winding reel (6) is fixed on the first bobbin (4), and the second winding reel (7) is fixed on the second bobbin (5); Part of the wire is wound on the first winding spool (6), and the other part of the wire passes through the crack (31) and is wound on the second winding spool (7); Rotate the first spool (4) and the second spool (5) so that the wire of the second winding disc (7) is wound on the second winding area (22); Remove the first winding reel (6) and the second winding reel (7) respectively, fix the first winding reel (6) on the second spool (5), rotate the first spool (4) and the second spool (5) so that the wire of the first winding reel (6) is wound on the first winding area (21).

Images