CN-224232428-U - High overload pre-tightening type high-temperature superconducting coil structure for electromagnetic ejection

CN224232428UCN 224232428 UCN224232428 UCN 224232428UCN-224232428-U

Abstract

The utility model provides a high-overload pre-tightening high-temperature superconducting coil structure for electromagnetic ejection, which comprises a plurality of high-temperature superconducting coil assemblies arranged in a stacked manner, wherein each high-temperature superconducting coil assembly comprises a coil framework and a high-temperature superconducting coil. The two sides of each coil framework along the axial direction are respectively and fixedly connected with an end plate, each high-temperature superconducting coil is respectively and adjacently connected with the end plates in an abutting mode, the high-temperature superconducting coils are limited in the axial direction through the end plates, and at least one end plate is arranged between every two adjacent high-temperature superconducting coil assemblies. A plurality of first limiting pieces are further arranged between two adjacent high-temperature superconducting coil assemblies at intervals along the circumferential direction, and each first limiting piece axially penetrates through the end plate between the two adjacent high-temperature superconducting coil assemblies so as to limit relative rotation between the two adjacent high-temperature superconducting coil assemblies in the circumferential direction and relative movement of the coil framework in the radial direction.

Inventors

HAO XIANGLIN
ZHANG YUKAI
XIE YI
TANG GUOJUN

Assignees

星际无阻(上海)航天科技有限公司

Dates

Publication Date: 20260512
Application Date: 20260409

Claims (10)

1. A high overload pre-tightening high temperature superconducting coil structure for electromagnetic ejection, characterized in that the high temperature superconducting coil structure comprises: The high-temperature superconducting coil comprises a plurality of high-temperature superconducting coil assemblies which are stacked, wherein each high-temperature superconducting coil assembly comprises a ring-shaped coil framework and high-temperature superconducting coils wound on the periphery of the coil framework along the circumferential direction of the coil framework, two sides of each coil framework along the axial direction of the coil framework are respectively fixedly connected with end plates, and two sides of each high-temperature superconducting coil along the axial direction of the coil framework are respectively abutted against the end plates so as to limit the high-temperature superconducting coils in the axial direction through the end plates; And a plurality of first limiting pieces are arranged between the two adjacent high-temperature superconducting coil assemblies at intervals along the circumferential direction, and each first limiting piece penetrates through the end plate between the two adjacent high-temperature superconducting coil assemblies along the axial direction so as to limit the relative rotation between the two adjacent high-temperature superconducting coil assemblies in the circumferential direction and the relative movement of the coil framework in the radial direction through the first limiting pieces.
2. The high-overload pre-tightening high-temperature superconducting coil structure for electromagnetic ejection according to claim 1, wherein two end plates are arranged between two adjacent high-temperature superconducting coil assemblies in an opposite mode along the axial direction, the two end plates are fixedly connected with the coil frameworks of the adjacent high-temperature superconducting coil assemblies respectively, a plurality of first limiting holes distributed along the circumferential direction are formed in two opposite sides of the two end plates respectively, the first limiting holes of the two end plates are arranged in pairs along the axial direction, and each first limiting piece penetrates through a corresponding pair of first limiting holes along the axial direction so as to limit relative rotation between the two end plates in the circumferential direction and relative movement in the radial direction.
3. The high overload pre-tightening high temperature superconducting coil structure for electromagnetic ejection of claim 2, wherein each of the end plates is annular and extends from an inner side of the bobbin to an outer side of the high temperature superconducting coil in the radial direction, and one end of each of the end plates, which is close to the bobbin in the radial direction, is fixedly connected with an adjacent bobbin; one of the two end plates opposed in the axial direction is provided with a flange near an end of the bobbin in the radial direction, the flange extending toward the other end plate in the axial direction, and the other end plate abuts against the flange near the end of the bobbin in the radial direction to restrict movement of the other end plate relative to the one end plate in the radial direction by the flange.
4. The high overload pre-tightening high temperature superconducting coil structure for electromagnetic ejection according to claim 1, wherein a radial limit assembly is provided on an outer peripheral side of each of the high temperature superconducting coils, each of the radial limit assemblies extending in the circumferential direction for compressing the high temperature superconducting coils against an outer peripheral surface of the coil bobbin in the radial direction; Every radial spacing subassembly includes adjusting part and pushes away and support the piece, adjusting part includes support piece and pretension adjusting part, wherein, the support piece interval set up in high temperature superconducting coil's periphery side, just support piece respectively with the high temperature superconducting coil follows two of axial both sides end plate fixed connection, pretension adjusting part follows radially pass support piece, pretension adjusting part be close to high temperature superconducting coil's one end with push away and support piece fixed connection, pretension adjusting part can be relative support piece follows radial movement, in order to pass through push to support the piece with high temperature superconducting coil compress tightly in coil skeleton's outer peripheral face.
5. The high-overload pre-tightening high-temperature superconducting coil structure for electromagnetic ejection according to claim 4, wherein each radial limiting assembly further comprises a pre-tightening part, the pre-tightening part comprises a pre-tightening part and an elastic buffer part, the pre-tightening part is arranged on the outer peripheral side of the high-temperature superconducting coil and compresses the high-temperature superconducting coil on the outer peripheral surface of the coil skeleton, a concave part extending along the radial direction is formed in one side, away from the high-temperature superconducting coil, of the pre-tightening part in the radial direction, the elastic buffer part is arranged in the concave part, one end of the elastic buffer part is in butt joint with the bottom wall of the concave part, and the other end of the elastic buffer part is in butt joint with one end, close to the high-temperature superconducting coil, of the pushing part.
6. The high overload pre-tightening high temperature superconducting coil structure for electromagnetic ejection according to claim 5, wherein an outer periphery of each of the high temperature superconducting coil assemblies is provided with at least two radial limit assemblies along the circumferential direction, wherein in each of the radial limit assemblies, the supporting member is provided as an arc-shaped plate-like structure extending along the circumferential direction, and the pushing member and the pre-tightening member are provided as arc-shaped plates extending along the circumferential direction and the axial direction; And each of the pretensioners is provided with a plurality of concave parts extending along the radial direction on one side of the pretensioner, which is away from the high-temperature superconducting coil, the plurality of concave parts are uniformly arranged at intervals along the circumferential direction, and each of the elastic buffer parts is configured as a plurality of disc springs which are stacked in the radial direction.
7. The high overload pre-tensioned high temperature superconducting coil structure for electromagnetic ejection of claim 6 wherein each end plate is fixedly connected between an end radially adjacent to the bobbin and an adjacent bobbin by a plurality of first fasteners disposed at intervals along the circumferential direction; The cross section of each support piece is of a U-shaped structure, an opening of the U-shaped structure faces the high-temperature superconducting coil along the radial direction, two side walls of the U-shaped structure are fixedly connected with two end plates of each coil framework along the two sides of the axial direction through a plurality of second fasteners arranged at intervals along the circumferential direction, and the cross section is a cross section of the support piece perpendicular to the length direction of the support piece.
8. The high overload pre-tightening high temperature superconducting coil structure for electromagnetic ejection according to claim 1, wherein at least two metal cold guide plates are arranged on the periphery of each high temperature superconducting coil along the circumferential direction, the metal cold guide plates are arc plates extending along the circumferential direction and the axial direction, the metal cold guide plates are in heat conduction connection with the high temperature superconducting coils, and a partition plate is arranged between two ends, adjacent to each other, of the two metal cold guide plates along the circumferential direction; Each high-temperature superconducting coil comprises a plurality of conductor layers which are overlapped along the axial direction, a first insulating layer is arranged between every two adjacent conductor layers, a second insulating layer is arranged between the inner peripheral surface of each conductor layer and the outer peripheral surface of the coil framework, a third insulating layer is arranged between the outer peripheral surface of each conductor layer and the metal cold guide plate, and a fourth insulating layer is arranged on one side, close to the conductor layers, of each end plate along the axial direction.
9. The high overload pre-tightening high temperature superconducting coil structure for electromagnetic ejection according to any one of claims 1 to 8, further comprising a low temperature housing, wherein the low temperature housing comprises a housing body and a cover plate, wherein the housing body is internally provided with a containing cavity, wherein the plurality of high temperature superconducting coil assemblies are arranged in the containing cavity along the height direction of the containing cavity, wherein the height direction is parallel to the axial direction, and wherein the cover plate is fixed and pressed at an opening of the containing cavity along the axial direction so as to limit relative movement between the plurality of high temperature superconducting coil assemblies along the axial direction.
10. The high overload pre-tensioned high temperature superconducting coil structure for electromagnetic ejection according to claim 9 wherein a plurality of second limiting elements are disposed between the cover plate and the adjacent end plate and between the bottom wall of the receiving chamber and the adjacent end plate in a penetrating manner at intervals along the circumferential direction so as to limit relative rotation between the plurality of high temperature superconducting coil assemblies and the low temperature housing in the circumferential direction and relative movement in the radial direction and the axial direction.

Description

High overload pre-tightening type high-temperature superconducting coil structure for electromagnetic ejection Technical Field The utility model relates to the technical field of superconducting coils, in particular to a high-overload pre-tightening high-temperature superconducting coil structure for electromagnetic ejection. Background The electromagnetic ejection technique is a technique for improving the ejection speed by using electromagnetic force generated by a linear ejection motor. The high-temperature superconducting magnet is a core power component of the electromagnetic ejection system, and the structural stability of the high-temperature superconducting magnet directly determines the thrust precision, the emission efficiency and the operation safety of electromagnetic ejection. The pulse heavy current can generate extremely strong axial electromagnetic thrust and radial expansion force through the coil, under the condition of high ejection acceleration (which can reach 10 g-20 g or even higher), the coil needs to bear huge inertial impact and vibration load, and meanwhile, the low temperature and vacuum environment required by the working of the superconducting magnet needs to be adapted, and the complex running environment of the superconducting coil can have adverse effects on the structural stability of the superconducting coil. The superconducting coil structure comprises a coil skeleton and a plurality of layers of superconducting coils wound on the periphery of the coil skeleton in the axial direction, wherein the coil skeleton in the prior art is of an integrated columnar or cylindrical structure, the plurality of layers of superconducting coils are wound on the periphery of the coil skeleton or the two axial ends of the coil skeleton and are simply fixed, and under the action of high overload impact and strong electromagnetic force, interlayer circumferential torsion is easy to occur between adjacent superconducting coils, for example, the adjacent two layers of superconducting coils can relatively rotate in the circumferential direction of the superconducting coils, so that the air gap magnetic field distortion is caused, the thrust precision of electromagnetic ejection is influenced, and the structural damage of the coils is further aggravated. Disclosure of utility model The utility model aims to solve the technical problem that interlayer circumferential torsion is easy to occur between adjacent superconducting coils in the prior art. In order to solve the technical problems, the embodiment of the utility model provides a high-temperature overload pre-tightening type high-temperature superconducting coil structure for electromagnetic ejection, which comprises a plurality of high-temperature superconducting coil assemblies arranged in a stacked manner, wherein each high-temperature superconducting coil assembly comprises a ring-shaped coil skeleton and a high-temperature superconducting coil wound on the periphery of the coil skeleton in the circumferential direction of the coil skeleton, each coil skeleton is respectively fixedly connected with end plates along two axial sides of the coil skeleton, each high-temperature superconducting coil is respectively abutted against the end plates along two axial sides so as to limit the high-temperature superconducting coil in the axial direction through the end plates, at least one end plate is arranged between two adjacent high-temperature superconducting coil assemblies, a plurality of first limiting pieces distributed at intervals in the circumferential direction are further arranged between the two adjacent high-temperature superconducting coil assemblies, and each first limiting piece axially penetrates through the end plate between the two adjacent high-temperature superconducting coil assemblies so as to limit relative rotation between the two adjacent high-temperature superconducting coil assemblies in the circumferential direction and relative movement in the radial direction of the coil skeleton through the first limiting pieces. According to the technical scheme, the end plates arranged on two sides of each high-temperature superconducting coil assembly are used for axially limiting the high-temperature superconducting coils wound on the coil frameworks, so that the axial deflection of the high-temperature superconducting coils on the coil frameworks is prevented, the end plates and the coil frameworks are fixedly connected to limit the coil frameworks along the radial direction of the coil frameworks, radial dislocation between the end plates and the coil frameworks is prevented, each first limiting piece penetrates through the end plates between two adjacent high-temperature superconducting coil assemblies, the relative movement between the two adjacent high-temperature superconducting coil assemblies in the radial direction of the coil frameworks can be limited, and a plurality of first limiting pieces are further arranged in th