A winding device for a double-pancake coil

Abstract

The present invention discloses a winding device for a double-pancake coil, comprising a coaxially arranged winding base plate, a coil skeleton plate and a baffle, the winding base plate is provided with a first limiting plane abutting one end of the coil skeleton plate, the outer peripheral edge of the first limiting plane radially extending out of the outer peripheral edge of the coil skeleton plate, the baffle abuts against the end face of the coil skeleton plate away from the first limiting plane, the side of the baffle away from the coil skeleton plate is replaceably provided with a limiting plate, the limiting plate is axially movably arranged on the baffle, the side of the limiting plate close to the first limiting plane is provided with a second limiting plane moving therewith, the second limiting plane surrounds the outer peripheral side of the baffle and the coil skeleton plate, and is parallel to the first limiting plane, the first limiting plane and the second limiting plane respectively abut against two sides of the coil along its width, the device can conveniently wind a runway-shaped high-temperature superconducting double-pancake coil with very high flatness, and can greatly improve the winding efficiency.

Description

Technical Field

[0001] The invention relates to the field of high-temperature superconducting coil winding, in particular to a winding device for a double-pancake coil. Background Art

[0002] High-temperature superconducting tape, with its high critical temperature and high current density, is particularly suitable for the manufacture of high-temperature superconducting magnets. High-temperature superconducting magnets typically consist of a double-pancake coil wound with high-temperature superconducting tape. The racetrack-shaped high-temperature superconducting double-pancake coil, a type of high-temperature superconducting double-pancake coil, is well-suited for applications such as high-temperature superconducting magnetic levitation, high-temperature superconducting motors, and particle accelerators due to its unique structure.

[0003] High-temperature superconducting tape is inherently fragile and easily damaged during the winding process, resulting in a loss of superconducting properties. During the winding process, a certain preload is typically applied to the tape. However, due to its unique shape, stresses vary significantly across different sections of the coil. Furthermore, the winding speeds vary across different sections, significantly increasing the complexity of the process.

[0004] The winding process for a racetrack-shaped HTS twin coil typically begins in the middle of a full HTS tape, first using one half to form a single coil, then using the remaining half to form another single coil, thus completing the twin coil. An insulating separator is placed between the two coils. Due to the complexity of the process, current winding methods still rely on manual hand-winding to ensure the flatness of the racetrack-shaped HTS twin coil. However, when using narrow HTS tape or a large number of turns, coil flatness remains challenging. Furthermore, winding efficiency is low due to the difficulty of maintaining human concentration for extended periods. Summary of the Invention

[0005] The purpose of the present invention is to provide a winding device for a double-pancake coil to solve the problems existing in the above-mentioned prior art. The device can conveniently wind a racetrack-shaped high-temperature superconducting double-pancake coil with very high flatness and can greatly improve the winding efficiency.

[0006] To achieve the above-mentioned objectives, the present invention provides the following scheme: The present invention provides a winding device for a double-cake coil, comprising a coaxially arranged winding base plate, a coil skeleton plate and a baffle, the winding base plate being provided with a first limiting plane abutting one end of the coil skeleton plate, the outer peripheral edge of the first limiting plane radially extending out of the outer peripheral edge of the coil skeleton plate, the baffle matching the structure of the coil skeleton plate, and abutting against the end face of the coil skeleton plate away from the first limiting plane, the side of the baffle away from the coil skeleton plate being replaceably provided with a limiting plate, the limiting plate being axially movably arranged on the baffle, the side of the limiting plate close to the first limiting plane being provided with a second limiting plane moving therewith, the second limiting plane surrounding the outer peripheral side of the baffle, and having a gap between the baffle and the coil bar for passing through, the second limiting plane being parallel to the first limiting plane, and having a limiting gap between the second limiting plane and the first limiting plane that is adapted to the width of the coil.

[0007] Preferably, the limiting plate includes two limiting sub-plates symmetrically distributed along the same straight line direction, both of the limiting sub-plates are movably arranged along the axis direction of the baffle, and both of the limiting sub-plates are provided with the second limiting plane that moves therewith.

[0008] Preferably, each of the limiting sub-plates is equipped with a mounting base for mounting it, the mounting base seat protrudes from the side of the baffle away from the coil frame plate, the mounting base has a mounting plane on the side away from the baffle, each of the mounting planes extends in a direction away from the other mounting base, and gradually tilts toward the baffle along the direction of its extension from the axis of the baffle, and each of the limiting sub-plates is fitted and slidably arranged on the mounting plane.

[0009] Preferably, the mounting base is a strip structure extending in the same direction as the mounting plane, the limiting plate is provided with a slot embedded and slidably connected to the mounting base, and the bottom of the slot is a planar structure that is fitted and slidably arranged on the mounting plane.

[0010] Preferably, the mounting plane is provided with a plurality of screw holes distributed at equal intervals along its extension direction, and the bottom of the slot is provided with through holes that move with it and correspond coaxially with each of the screw holes, and limiting bolts are inserted between the through holes and the corresponding screw holes.

[0011] Preferably, a weight-reducing groove is provided at a middle position of the mounting base, the weight-reducing groove extends in the same direction as the mounting plane, and the mounting base is provided with the threaded holes at positions on both sides of the weight-reducing groove in the width direction.

[0012] Preferably, the limiting plate is provided with an arc-shaped limiting portion connected to the slot, the arc-shaped limiting portion surrounds the outer peripheral edge of the baffle, and an arc-shaped gap is provided between the outer peripheral edges of the baffle for the coil bar to pass through, and the second limiting plane is located on the side of the arc-shaped limiting portion close to the first limiting plane.

[0013] Preferably, positioning grooves and positioning protrusions for interlocking and plugging are provided between the winding base plate and the coil skeleton plate, and between the coil skeleton plate and the baffle.

[0014] Preferably, it also includes a center shaft, one end of which is transmission-connected to the winding machine main shaft, and the other end is provided with a thread and passes through the winding base plate, the coil skeleton plate and the baffle in sequence. There is a gap between the two mounting bases for the threaded end of the center shaft to extend out, and the center shaft is connected to the end of the winding machine main shaft and is rotatably sleeved with a center shaft disk, the center shaft disk abuts against the winding base plate, the threaded end of the center shaft is threadedly connected to a limit nut abutting against the baffle, and a sleeve is provided between the limit nut and the baffle.

[0015] Preferably, a plurality of connecting bolts are provided on the circumferential direction of the central shaft disk, and a threaded blind hole corresponding to each connecting bolt is opened on the side of the baffle close to the coil skeleton plate, and each connecting bolt passes through the winding base plate and the coil skeleton plate in turn and is connected at the threaded blind hole.

[0016] Compared with the prior art, the present invention has achieved the following technical effects:

[0017] First, since the baffle is provided with a replaceable limit plate on the side away from the coil skeleton plate, the length of each limit plate along the axial direction of the baffle is different. Therefore, when winding a single-coil coil, the limit plate with a larger axial length is replaced, so that the second limit plane on the limit plate is close to the first limit plane, and a limit interval is formed between the limit plate and the first limit plane to match the width of the single-coil coil. Moreover, since the limit plate is movably arranged on the baffle along the axial direction to fine-tune the limit interval, the accuracy of matching the limit interval with the width of the single-coil coil is further improved. Limiting the single-coil coil during winding is beneficial to the flatness of the coil during winding and can prevent creep deformation of the already wound turns. When winding a double-coil coil, the limit plate with a smaller axial length is replaced to expand the limit interval between the second limit plane and the first limit plane, and after fine-tuning, to match the width of the double-coil coil, the flatness of the double-coil coil during winding is further ensured, and the traditional hand-held winding method that requires winding workers to work with high concentration throughout the process is avoided, thereby improving winding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is a schematic diagram of the assembly of a racetrack-shaped high-temperature superconducting double-pancake coil winding device according to an embodiment of the present invention.

[0020] Figure 2 This is an exploded diagram of a racetrack-shaped high-temperature superconducting double-pancake coil winding device according to an embodiment of the present invention.

[0021] Figure 3 This is a schematic diagram of the central axis structure of an embodiment of the present invention.

[0022] Figure 4 This is a schematic diagram of the winding base plate structure of an embodiment of the present invention

[0023] Figure 5 This is a schematic diagram of the coil skeleton structure of an embodiment of the present invention

[0024] Figure 6 This is a schematic diagram of the coil skeleton baffle structure of an embodiment of the present invention

[0025] Figure 7 Schematic diagram of the limiting plate structure of an embodiment of the present invention

[0026] In the figure: 1-center axis; 2-winding base plate; 3-coil skeleton plate; 4-baffle; 5-limiting dividing plate; 6-shaft sleeve; 101-center axis disk; 201-positioning groove; 301-limiting edge; 401-mounting base; 402-screw hole; 501-slot; 502-arc-shaped limiting part; 503-through hole. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] The purpose of the present invention is to provide a winding device for a double-pancake coil to solve the problems existing in the above-mentioned prior art. The device can conveniently wind a racetrack-shaped high-temperature superconducting double-pancake coil with very high flatness and can greatly improve the winding efficiency.

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] like Figures 1 to 7 As shown, this embodiment provides a winding device for a double-pancake coil, which is mainly used for winding a racetrack-shaped superconducting double-pancake coil, including a coaxially arranged winding base plate 2, a coil skeleton plate 3 and a baffle 4. The coil skeleton is used to provide support for the racetrack-shaped superconducting double-pancake coil. The winding base plate 2 is provided with a first limiting plane that abuts one end of the coil skeleton plate 3. The outer peripheral edge of the first limiting plane extends radially out of the outer peripheral edge of the coil skeleton plate 3. The baffle 4 matches the structure of the coil skeleton plate 3 and is affixed to the end face of the coil skeleton plate 3 away from the first limiting plane. A limit plate is replaceably provided on the side of the baffle 4 away from the coil skeleton plate 3. The limit plate is axially movably set on the baffle 4. On the one hand, the baffle 4 is clamped and fixed together with the winding base plate 2. On the other hand, the coil skeleton plate 3 serves as an installation carrier for the limit plate, which can make the limit plate movably set. A second limit plane that moves with the limit plate is provided on the side of the limit plate close to the first limit plane. The second limit plane surrounds the outer peripheral side of the baffle 4, and has a gap between the second limit plane and the baffle 4 for the coil bar to pass through. In the specific process of winding the coil, the turntable with the coil bar is located on the side of the limit plate away from the baffle 4. After one end of the coil bar passes through the gap between the second limit plane and the baffle 4, it is first wound around the outer peripheral surface of the baffle 4 for two to three turns for transition, and then wound onto the outer peripheral surface of the coil skeleton plate 3. The second limit plane is parallel to the first limit plane, and has a limit gap between the second limit plane and the first limit plane that is adapted to the coil width. In order to wind the racetrack-shaped superconducting double-pancake coil, the preferred coil skeleton plate 3 and baffle 4 both have an outer peripheral surface that is compatible with the racetrack-shaped superconducting double-pancake coil structure, that is, the two ends of the outer peripheral surface have arc surfaces that match the arc part of the racetrack-shaped superconducting double-pancake coil, and a strip plane is connected between the ends of the two arc surfaces, and the strip plane matches the long strip part in the middle of the racetrack-shaped superconducting double-pancake line.

[0031] First, since the baffle 4 is provided with a replaceable limit plate on the side away from the coil skeleton plate 3, each limit plate has a different axial length along the baffle 4. Therefore, when winding a single-coil coil, the limit plate with a larger axial length is replaced, so that the second limit plane on the limit plate approaches the first limit plane, and a limit interval is formed between the limit plate and the first limit plane to match the width of the single-coil coil. Moreover, since the limit plate is axially movable on the baffle 4 to fine-tune the limit interval, the accuracy of matching the limit interval with the width of the single-coil coil is further improved. Limiting the single-coil coil during winding is beneficial to the flatness of the coil during winding and can prevent creep deformation of the already wound turns. When winding a double-coil coil, the limit plate with a smaller axial length is replaced, the limit interval between the second limit plane and the first limit plane is expanded, and after fine-tuning, it is adapted to the width of the double-coil coil, further ensuring the flatness of the double-coil coil during winding and avoiding the need for winding workers to work with high concentration throughout the traditional hand-held winding method, thereby improving winding efficiency.

[0032] The limiting plate comprises two symmetrically spaced limiting plates 5 along the same straight line. Both limiting plates 5 are movable along the axis of the baffle 4 and feature a second limiting surface that moves with them. Specifically, the inner radius of the second limiting surface on each limiting plate 5 is slightly larger than the outer radius of the baffle 4, creating a gap between the second limiting surface and the outer edge of the baffle 4 for the coil strip to pass through. This creates space for the HTS tape on the second side of the single-sided coil when winding the first side of a racetrack-shaped HTS double-sided coil.

[0033] Furthermore, each limiting sub-plate 5 is equipped with a mounting base 401 for mounting it. The mounting base 401 protrudes from the side of the baffle 4 away from the coil skeleton plate 3. The side of the mounting base 401 away from the baffle 4 has a mounting surface. Each mounting surface extends away from the other mounting base 401 and gradually tilts toward the baffle 4 along the direction of its extension from the axis of the baffle 4. Each limiting sub-plate 5 fits and slides on the mounting surface to facilitate accurate fine-tuning of the limiting sub-plate 5 and ensure that the limiting interval accurately matches the coil width. Preferably, the mounting base 401 is a strip-shaped structure extending in the same direction as the mounting surface. The limiting sub-plate 5 is provided with a slot 501 that is embedded and slidably connected to the mounting base 401. The bottom of the slot 501 is a flat structure that fits and slides on the mounting surface to facilitate sliding of the limiting sub-plate 5.

[0034] Furthermore, the mounting plane is provided with a plurality of screw holes 402 distributed at equal intervals along its extension direction, and a through hole 503 is provided on the bottom of the slot 501 which moves with it and is coaxial with each screw hole 402. Limiting bolts are inserted between the through holes 503 and the corresponding screw holes 402, and limiting bolts are installed in different screw holes 402 to connect with the corresponding through holes 503. The limiting interval width between the second limiting plane and the first limiting plane on the limiting sub-plate 5 can be fine-tuned. Preferably, a plurality of through holes 503 are provided to ensure the bonding strength between the limiting sub-plate 5 and the mounting plane through the connection of multiple groups of limiting bolts. The spacing between two adjacent through holes 503 is slightly larger or slightly smaller than the spacing between two adjacent screw holes 402.

[0035] As a preferred embodiment of the present invention, a weight-reducing slot is provided in the middle of the mounting base 401. The slot extends in the same direction as the mounting plane to reduce the weight of the mounting base 401 and reduce the need to rotate the mounting base 401. Threaded holes are provided on both sides of the slot in the width direction of the mounting base 401 to fully ensure the secure connection between the mounting base 401 and the limiting plate 5. The limiting plate 5 is provided with an arcuate limiting portion 502 connected to the slot 501. The arcuate limiting portion 502 is configured to accommodate the arcuate portion of the racetrack-shaped superconducting double-pancake coil. The arcuate limiting portion 502 surrounds the outer edge of the baffle 4, and an arcuate gap is provided between the outer edges of the baffle 4 for the coil bar to pass through. The second limiting plane is located on the side of the arcuate limiting portion 502 closest to the first limiting plane.

[0036] Furthermore, interlocking positioning grooves 201 and positioning protrusions are provided between the winding base plate 2 and the coil skeleton plate 3, and between the coil skeleton plate 3 and the baffle 4. The positioning grooves 201 and the positioning protrusions are all arranged on the fitting surfaces of the winding base plate 2, the coil skeleton plate 3 and the baffle 4, so as to limit and lock the three when they are connected in sequence, avoiding misaligned connection and affecting the subsequent winding of the coil.

[0037] The entire device also includes a center shaft 1, one end of the center shaft 1 is transmission-connected to the winding machine main shaft, and the other end is provided with a thread and passes through the winding base plate 2, the coil skeleton plate 3 and the baffle 4 in sequence. There is a gap between the two mounting bases 401 for the threaded end of the center shaft 1 to extend out. The center shaft 1 is connected to the end of the winding machine main shaft and is rotatably sleeved with a center shaft disk 101. The center shaft disk 101 abuts on the winding base plate 2. The threaded end of the center shaft 1 is threadedly connected to a limit nut abutting on the baffle 4. A shaft sleeve 6 is provided between the limit nut and the baffle 4. The shaft sleeve 6 is used to facilitate the cooperation between the limit nut and the center shaft disk 101 to clamp the entire structure.

[0038] Moreover, a number of connecting bolts are provided on the circumferential direction of the central shaft disk 101, and a threaded blind hole corresponding to each connecting bolt is opened on the side of the baffle 4 close to the coil skeleton plate 3. Each connecting bolt passes through the winding base plate 2 and the coil skeleton plate 3 in turn and is connected at the threaded blind hole, so that each structure is tightly connected by bolts.

[0039] As a preferred embodiment of the present invention, the outer peripheral surface of the coil skeleton plate 3 is provided with a circle of limiting edge 301, and the limiting edge 301 is located on the side of the coil skeleton plate 3 close to the baffle 4. Its structure is relatively small, and its thickness is the superimposed thickness of two to three circles of coil bars. It can prevent the innermost layer of high-temperature superconducting wire turns from protruding outside the coil skeleton, and is used to ensure that the initially wound turns are arranged neatly.

[0040] During the specific winding process, when winding the single coil on the first side of the racetrack-shaped HTS twin-pancake coil, a larger axial length limiting plate 5 can be used to form a narrower limiting gap between the limiting plate 5 and the winding base plate 2. Each structure is then installed sequentially. The limiting gap is fine-tuned by aligning different screw holes 402 and through holes 503 to form a suitable limiting gap for winding between the limiting plate and the winding base plate 2. The winding machine is then started, and the automated winding of the single coil on the first side of the racetrack-shaped HTS twin-pancake coil can begin. When winding the single coil on the second side of the racetrack-shaped HTS twin-pancake coil, a smaller axial length limiting plate can be replaced. The limiting width is fine-tuned by aligning different screw holes 402 and through holes 503 to form a suitable limiting gap for winding between the limiting plate and the single coil on the first side. The winding machine is then started, and the automated winding of the single coil on the first side of the racetrack-shaped HTS twin-pancake coil can begin.

[0041] Adaptive changes based on actual needs are all within the scope of protection of the present invention.

[0042] It should be noted that it will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and it is intended that all variations within the meaning and range of equivalents of the claims be encompassed within the present invention. Any reference signs in the claims should not be construed as limiting the claim to which they relate.

[0043] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A winding device for a double-pancake coil, characterized in that: The cam is adapted to engage said first and second limit switches, wherein the first limit switches are adapted to engage said first and second limit switches, and the cam is adapted to engage said first and second limit switches, wherein the first limit switches are adapted to engage said first and second limit switches. and a plurality of mounting plates, each of which is symmetrically distributed along the same straight line direction, and each of the plurality of limiting plates is movably arranged along the axis direction of the baffle, and each of the plurality of limiting plates is provided with a second limiting plane that moves with the limiting plate; each of the plurality of limiting plates is equipped with a mounting base for mounting it, and the mounting base seat protrudes from one side of the baffle away from the coil skeleton plate, and the side of the mounting base away from the baffle has a mounting plane, each mounting plane extends in a direction away from the other mounting base, and gradually tilts toward the baffle from the axis center of the baffle along the direction of its extension, each limiting plate is fitted with and slidably arranged on the mounting plane; the mounting base is a strip structure extending in the same direction as the mounting plane, and the limiting plate is provided with a slot that is embedded and slidably connected to the mounting base, and the bottom of the slot is a planar structure that is fitted and slidably arranged on the mounting plane; The limiting plate is provided with an arc-shaped limiting portion connected to the slot, the arc-shaped limiting portion surrounds the outer peripheral edge of the baffle, and an arc-shaped gap is provided between the outer peripheral edges of the baffle for the coil bar to pass through, and the second limiting plane is located on the side of the arc-shaped limiting portion close to the first limiting plane.

2. The double-pancake coil winding device according to claim 1, characterized in that: The mounting plane is provided with a plurality of screw holes distributed at equal intervals along its extension direction, and the bottom of the slot is provided with through holes that move with it and correspond coaxially with each of the screw holes, and limiting bolts are inserted between the through holes and the corresponding screw holes.

3. The winding device of the double-pancake coil according to claim 2, characterized in that: A weight-reducing groove is provided at the middle of the mounting base, the weight-reducing groove extends in the same direction as the mounting plane, and the mounting base is provided with screw holes at positions on both sides of the weight-reducing groove in the width direction.

4. The double-pancake coil winding device according to claim 3, characterized in that: Positioning grooves and positioning protrusions for interlocking and plugging are provided between the winding bottom plate and the coil skeleton plate, and between the coil skeleton plate and the baffle plate.

5. The double-pancake coil winding device according to claim 4, characterized in that: It also includes a center shaft, one end of which is transmission-connected to the winding machine main shaft, and the other end is provided with a thread and passes through the winding base plate, the coil skeleton plate and the baffle in sequence. There is a gap between the two mounting bases for the threaded end of the center shaft to extend out. The center shaft is connected to the end of the winding machine main shaft and is rotatably sleeved with a center shaft disk. The center shaft disk abuts against the winding base plate, and the threaded end of the center shaft is threadedly connected to a limit nut abutting against the baffle, and a shaft sleeve is provided between the limit nut and the baffle.

6. The double-pancake coil winding device according to claim 5, characterized in that: A plurality of connecting bolts are provided on the central shaft disk along the circumference, and a threaded blind hole corresponding to each connecting bolt is opened on the side of the baffle close to the coil skeleton plate. Each connecting bolt passes through the winding base plate and the coil skeleton plate in sequence and is connected at the threaded blind hole.

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