High-temperature superconducting coil and heat sink assembly therefor

Abstract

The present invention relates to the technical field of superconducting electrical power, and specifically provides a high-temperature superconducting coil and a heat sink assembly for the high-temperature superconducting coil. The high-temperature superconducting coil comprises a superconducting wire turn, and the superconducting wire turn comprises one or more groups arranged along a radial direction of the high-temperature superconducting coil. The heat sink assembly comprises at least one heat sink, the heat sink comprising a heat sink base body. A strip-shaped gap on the heat sink base body extends along a first direction, and a first strip-shaped part on the heat sink base body extends along a second direction. In an assembled state, the heat sink base body and at least a portion of the strip-shaped gap are located on the surface of one side, along the radial direction, of a group of superconducting wire turns, and an included angle is formed between at least a portion part of the first strip-shaped part and the surface of one side, along the radial direction, of a group of superconducting wire turns. By means of such a configuration, heat generated inside the superconducting wire turn can be guided out in a timely manner by means of a multi-directional heat conduction assembly.

Description

A high temperature superconducting coil and a heat sink assembly therefor TECHNICAL FIELD

[0001] The present application belongs to the technical field of superconducting electrical engineering, and particularly relates to a high temperature superconducting coil and a heat sink assembly therefor. BACKGROUND

[0002] A high temperature superconducting coil is a current-carrying winding wound by superconducting tapes. For a high temperature superconducting coil for strong magnetic field, the number of turns can reach tens of thousands, and accordingly, the radial dimension (radius) of this type of high temperature superconducting coil can exceed 100 mm, and the axial height (length) can exceed 1000 mm. During use of the high temperature superconducting coil, it will inevitably undergo processes such as excitation and demagnetization, and these processes will be accompanied by rapid change of magnetic flux. Corresponding to the rapid change of magnetic flux, the superconducting tapes will inevitably generate a certain amount of alternating current loss, i.e. a certain amount of heating power and thus heat. If the generated heat cannot be quickly removed, it will easily lead to quench of the superconducting tapes, thereby affecting the performance of the high temperature superconducting coil.

[0003] Since the high temperature superconducting coil is usually in a tightly wound structure, and on the basis of the tightly wound structure, an epoxy resin or the like is used for curing to ensure the reliability of the high temperature superconducting coil, the heat conduction performance of the high temperature superconducting coil is generally poor. Fig. 1 shows a basic structure schematic diagram of an existing example of a high temperature superconducting coil. As shown in Fig. 1, the structure of the high temperature superconducting coil usually includes a superconducting coil skeleton 01, superconducting tapes wound on the coil skeleton, and a coil binding structure 02 provided at the outermost side of the superconducting tapes. The superconducting coil skeleton and the coil binding structure are usually made of metal material, thus playing a certain role in heat conduction. However, the central region 03 of the superconducting tapes (the central region of the superconducting tapes along the thickness thereof) of the high temperature superconducting coil is actually at a certain distance from the superconducting coil skeleton and the coil binding structure, and thus lacks a reasonable heat transfer path for the heat generated in this region to be transferred out. In the case of relying only on the non-metallic filler used for curing and the heat conduction of the superconducting tapes themselves, the thermal conductivity is extremely low, and thus it is almost impossible to quickly remove the generated heat in a short time. This problem is particularly prominent for high temperature superconducting coils with large radial / axial dimensions.

[0004] In addition, for a large-size high temperature superconducting coil, there is no reinforcing structure along the axial and radial directions after curing of the high temperature superconducting coil, and thus under the action of high-strength external forces such as cold shrinkage stress, electromagnetic stress and the like which cannot be avoided, phenomena such as structural peeling and micro-cracks can easily occur between the superconducting tapes and the cured filler, and in severe cases, the overall structure of the high temperature superconducting coil can even collapse.

[0005] In order to improve the heat conduction effect of the high-temperature superconducting coil in the region corresponding to the inside of the superconducting tape, researchers have tried to use the following means: adding a heat-conducting material such as a copper / aluminum foil in the high-temperature superconducting coil (such as a copper / aluminum foil at the joint of the superconducting tape). Taking the addition of a metal foil in the high-temperature superconducting coil as an example, for this case, because the thickness of the added metal foil is usually only about 0.1 mm, due to the local electric field concentration at the edge of the metal foil, the insulation performance of the high-temperature superconducting coil will be affected. In addition, the metal foil will induce eddy current heating when the magnetic flux of the high-temperature superconducting coil changes rapidly, which will affect the thermal stability of the high-temperature superconducting coil. In addition, the metal foil has poor adhesion with the curing material such as epoxy resin during the curing process of the high-temperature superconducting coil, so this method not only hinders the flow of the resin during the curing process, but also causes the delamination of the materials on the inside and outside of the cured metal foil, thereby affecting the overall structural strength of the high-temperature superconducting coil.

[0006] Doping high-thermal-conductivity materials such as aluminum nitride in the curing material such as epoxy resin, but for this case, since the viscosity of the epoxy resin material increases significantly after doping the high-thermal-conductivity material, the doped high-thermal-conductivity material is extremely difficult to penetrate into the densely wound high-temperature superconducting coil, and even if it penetrates, the amount is extremely limited, so the improvement of the heat conduction effect by this method is extremely limited.

[0007] SUMMARY

[0008] The present application mainly aims at the problem that the heat inside the superconducting turns of the high-temperature superconducting coil cannot be dissipated in time, and proposes a feasible superconducting turn cooling scheme.

[0009] Therefore, in a first aspect, the present application provides a heat sink assembly for a high-temperature superconducting coil, the high-temperature superconducting coil comprising superconducting turns, the superconducting turns comprising one or more groups arranged along the radial direction of the high-temperature superconducting coil, the heat sink assembly comprising at least one heat sink, the heat sink comprising a heat sink base body, the heat sink base body extending a strip-shaped gap in a first direction, and the heat sink base body extending a first strip-shaped part in a second direction, and in an assembled state: at least a part of the heat sink base body and the strip-shaped gap is on one side surface of a certain group of the superconducting turns along the radial direction thereof; and at least a part of the first strip-shaped part has an included angle with one side surface of a certain group of the superconducting turns along the radial direction thereof.

[0010] Through such a structure, the heat generated inside the superconducting turns can be promptly dissipated through multi-directional heat conduction combination.

[0011] It can be understood that the skilled in the art determines the structure form, number and relative position of each strip gap in the plane of the superconducting tape according to actual needs. For example, the different strip gaps can have an included angle, the strip gaps can be straight lines, broken lines, curves and combinations thereof.

[0012] In addition, it can be understood that the skilled in the art determines the structure form, number and included angle between each first strip portion and the plane of the superconducting tape according to actual needs. For example, the included angles between different first strip portions and the plane of the superconducting tape can be the same or different, the structures of different first strip portions can be the same or different, and different first strip portions can be coplanar, non-coplanar, parallel, non-parallel, etc.

[0013] It should be noted that the side surface of the superconducting turn along its radial direction is generally a curved surface (cylindrical surface), and the included angle between at least a part of the first strip portion and the side surface of a certain group of superconducting turns along its radial direction should be understood as the included angle between the first strip portion and the tangent plane at that position.

[0014] For the heat sink assembly for a high-temperature superconducting coil described above, in a possible implementation, the second strip portion extends on the heat sink base along the first direction, and the strip gap is formed between adjacent second strip portions.

[0015] Through such a configuration, a possible formation mode of the strip gap is given.

[0016] For the heat sink assembly for a high-temperature superconducting coil described above, in a possible implementation, a plurality of strip gaps extend on the heat sink base along the axial direction of the high-temperature superconducting coil in the assembled state.

[0017] Through such a configuration, a specific form of the first direction in which the strip gap extends is given. For example, based on this, it is possible to seek to reduce the temperature rise to a certain extent by conducting the heat generated inside the superconducting turn to the surrounding area.

[0018] For the heat sink assembly for a high-temperature superconducting coil described above, in a possible implementation, the first strip portion includes: a first sub-strip portion extending on the heat sink base along the second direction in the assembled state; and a second sub-strip portion extending on the first sub-strip portion along a third direction having an included angle with the second direction in the assembled state.

[0019] Through such a configuration, a possible structure form of the first strip portion is given.

[0020] It can be understood that the specific form of the second / third direction, the structural form of the first / second sub-strip portion, the relative position relationship between each first / second sub-strip portion, and the like can be determined by the person skilled in the art according to actual needs.

[0021] For the heat sink assembly for the high-temperature superconducting coil, in a possible implementation, the first sub-strip portion is formed by the heat sink base body extending in the radial direction of the high-temperature superconducting coil; and / or the second sub-strip portion is formed by the first sub-strip portion extending in the axial direction of the high-temperature superconducting coil.

[0022] Through such a configuration, the specific form of the second direction and the third direction is given.

[0023] For the heat sink assembly for the high-temperature superconducting coil, in a possible implementation, the first sub-strip portion and the second sub-strip portion can be accommodated in the corresponding position of the strip gap in the state of being unfolded in the same plane.

[0024] Through such a configuration, a specific way of the first strip portion and the strip gap assembly heat sink assembly is given.

[0025] For the heat sink assembly for the high-temperature superconducting coil, in a possible implementation, the strip gap is formed on the heat sink base body at the same time when the first strip portion is cut out; and / or the heat sink base body is a flexible structure.

[0026] Through such a configuration, the forming way of the first strip portion and the strip gap is given. The flexible structure can facilitate the cutting and the corresponding bending operation.

[0027] For the heat sink assembly for the high-temperature superconducting coil, in a possible implementation, the heat sink base body includes a first base body and at least one second base body arranged on the first base body, wherein the first strip portion and the second strip portion are arranged or formed on the second base body, and the first base body can cover at least part of the side surface of a certain group of superconducting turns along the radial direction thereof.

[0028] Through such a configuration, a possible structural form of the first / second base body is given.

[0029] For the heat sink assembly for the high-temperature superconducting coil, in a possible implementation, in the assembled state, the two ends of the first base body are respectively provided with the second base body in the axial direction of the high-temperature superconducting coil.

[0030] Through such a configuration, it can be sought to better reduce the temperature rise caused by the heat generated inside the superconducting turns and unable to be dissipated in time by the combination of the first base body and the two second base bodies.

[0031] In a second aspect, the present application provides a high temperature superconducting coil comprising the heat sink assembly for high temperature superconducting coil according to any one of the preceding aspects.

[0032] It can be understood that the high temperature superconducting coil has all the technical effects of the heat sink assembly for high temperature superconducting coil according to any one of the preceding aspects, which will not be repeated here.

[0033] Additional aspects and advantages of the present application will be set forth in part in the following description, will become apparent from the following description, or will be learned through practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0035] Fig. 1 shows a basic structure schematic diagram of a prior art high temperature superconducting coil;

[0036] Fig. 2 shows a structure schematic diagram of a heat sink assembly for high temperature superconducting coil according to an embodiment of the present application;

[0037] Fig. 3 shows a state schematic diagram of a high temperature superconducting coil when the first group of superconducting wire turns are wound;

[0038] Fig. 4 shows a specification schematic diagram one of a fiber cloth adopted by the heat sink assembly for superconducting coil according to an embodiment of the present application;

[0039] Fig. 5 shows a specification schematic diagram two of a fiber cloth adopted by the heat sink assembly for superconducting coil according to an embodiment of the present application;

[0040] Fig. 6 shows a structure schematic diagram of a heat sink in the heat sink assembly for superconducting coil according to an embodiment of the present application;

[0041] Fig. 7 shows a mounting schematic diagram of the first layer of heat sink according to an embodiment of the present application;

[0042] Fig. 8 shows a winding schematic diagram of the second group of superconducting wire turns according to an embodiment of the present application;

[0043] Fig. 9 shows a mounting schematic diagram of the i-th layer of heat sink according to an embodiment of the present application;

[0044] Fig. 10 shows a winding schematic diagram of the i+1-th group of superconducting wire turns according to an embodiment of the present application; and

[0045] Figure 11 shows a schematic diagram of the structure of a high temperature superconducting coil comprising a heat sink assembly according to an embodiment of the present application (the outermost Nth set of superconducting turns is not provided with a heat sink, i.e. the Nth set of superconducting turns is provided with N+1 layers of heat sinks).

[0046] In the drawings:

[0047] 01, superconducting coil former;

[0048] 02, coil binding structure;

[0049] 03, central region of superconducting tape;

[0050] 100, high temperature superconducting coil;

[0051] 11, coil former; 12, superconducting turn;

[0052] 200, heat sink assembly;

[0053] 2, heat sink;

[0054] 20, heat sink base;

[0055] 201, first base; 202, second base;

[0056] 21, first strip portion;

[0057] 211, first sub-strip portion; 212, second sub-strip portion;

[0058] 22, second strip portion;

[0059] 23, strip gap. DETAILED DESCRIPTION

[0060] Further, in order to better illustrate the present application, numerous specific details are set forth in the following detailed description, which will be understood by those skilled in the art to be illustrative and not limiting, as the application is capable of being practiced with certain specific details not set forth. In some instances, well-known structures, principles, and techniques of high temperature superconducting coils, superconducting tapes, and the like, are not described in detail in order to not unnecessarily obscure the subject matter of the present application.

[0061] Referring to FIG. 2, FIG. 2 shows a structural schematic diagram of a heat sink assembly for a high-temperature superconducting coil according to an embodiment of the present application. As shown in FIG. 2, in a possible implementation, the high-temperature superconducting coil 100 mainly comprises a coil former 11 and a superconducting winding 12 tightly wound on the coil former, the superconducting winding generally comprises a plurality of layers of superconducting tapes, and the superconducting winding is provided with a heat sink assembly 200 mainly used for assisting cooling of the superconducting winding to timely and quickly release heat generated inside the superconducting winding. According to factors such as the size of the superconducting winding, the heat sink assembly 200 generally comprises a plurality of heat sinks 2, and in this example, the structure and manufacturing method of each heat sink are substantially the same. Obviously, the plurality of heat sinks can also be designed differently according to actual conditions, such as in terms of size, installation position, uniformization setting, and heat dissipation density that can be coped with. The heat sink is made of a flexible matrix (such as a fiber cloth) of a non-metallic material with high thermal conductivity, and a commonly used manufacturing material is a high-thermal-conductivity carbon fiber cloth. The following will be described taking one of the heat sinks as an example.

[0062] In the present application, since the heat sink (part of the structure) needs to cross the superconducting winding along the radial direction of the high-temperature superconducting coil, in order to avoid short circuit phenomenon, the heat sink assembly is made of a non-metallic material with insulating properties. In addition, since the heat sink in the present application also needs to have a certain flexibility, under the condition of meeting the two conditions, in addition to the aforementioned high-thermal-conductivity carbon fiber cloth, other materials such as glass fiber cloth, polyimide fiber cloth, and polyamide fiber cloth which include but are not limited to high-thermal-conductivity non-metallic powder (such as aluminum nitride, aluminum oxide, silicon carbide, etc.) can also be used.

[0063] In a possible implementation, the heat sink 2 comprises a heat sink matrix 20, and a plurality of first strip-shaped parts 21 respectively extend from both ends of the heat sink matrix along the radial direction of the high-temperature superconducting coil (in the assembled state), and a plurality of strip-shaped gaps 23 respectively extend from both ends of the heat sink matrix along the axial direction of the high-temperature superconducting coil (in the assembled state). That is, the heat sink 2 comprises a heat sink matrix 20 and two groups of first strip-shaped parts 21 and two groups of strip-shaped gaps 23 respectively extended from both ends of the heat sink matrix.

[0064] In a possible implementation, the first strip-shaped part 21 comprises a first sub-strip-shaped part 211 extending along the radial direction of the high-temperature superconducting coil (in the assembled state) and a second strip-shaped part 212 extending from the first sub-strip-shaped part 211 along the axial direction of the high-temperature superconducting coil (in the assembled state).

[0065] In one possible implementation, the first sub-stripe portion 211 and the second sub-stripe portion 212 can exactly fit the stripe gap 23 at the corresponding position when unfolded in the same plane. In the present example, the first stripe portion 21 is cut out on the heat sink base 20 and the stripe gap 23 is formed.

[0066] In one possible implementation, the heat sink base 20 includes a first base 201 and two second bases 202 respectively arranged at the two ends of the first base (the two ends along the axial direction of the high-temperature superconducting coil), and the first stripe portion 21 and the second stripe portion 22 are arranged, formed or constituted on the second base 202. In the present example, the first base 201 can cover the superconducting tape at the corresponding position along the circumferential direction of the superconducting coil in the assembled state.

[0067] It should be noted that the first base 201 of the heat sink completely covers the outer surface of the corresponding group of superconducting coil turns along the circumferential direction is only an exemplary description, and those skilled in the art can adjust it according to actual needs, such as including but not limited to: the first base of the heat sink in the assembled state is an arc segment capable of covering a part of the circumferential annular region, and each radial position along the circumferential direction includes one or more arc segments. Exemplarily: corresponding to a radial position of one circumference, a heat sink provided with three (or two or more) arc segments, the heat sink between the three arc segments has a gap or is substantially tightly connected, and the three arc segments are substantially combined into a ring structure; corresponding to a radial position of one circumference, the heat sink is provided with only one (or more) arc segment, for example, the heat sink has an open arc segment along the circumferential direction; etc.

[0068] In addition, it should be noted that the first base capable of being arranged into a cylindrical structure, the combination of the first base and the pair of second bases, and the combination of the two groups of first / second stripe structures and the two groups of stripe gaps are only exemplary descriptions of the heat sink, and those skilled in the art can flexibly adjust them according to actual conditions, such as the structures of the two ends of the first base can be the same or different, and part of the first base is provided with a second base at only one end, etc.

[0069] In addition, after the superconducting coil turns are divided into multiple groups, configuring a heat sink for each group of superconducting coil turns is only an exemplary description, and it can also be, for example, configuring a layer of heat sink for only part of them, configuring two layers of heat sink for a group of superconducting coil turns, etc. Moreover, the extension position / extension direction of the multiple groups of first stripe portions can also be flexibly adjusted according to actual needs.

[0070] Exemplarily, the pair of second bases of the heat sink base body can be cut into strips according to a certain rule. Taking one of the second bases as an example, due to the formation of the strip gap, the heat sink base body has a plurality of second strip parts extending along the axial direction of the high-temperature superconducting coil. The plurality of first strip parts and the plurality of second strip parts divide the fiber cloth strips into two groups at intervals, one group (the second strip part) can be directly attached to the same layer plane of the superconducting tape in the circumferential direction, and the other group (the first strip part) is led out in the radial direction of the high-temperature superconducting coil. After all the superconducting turns are wound, the first strip part is bent, and the first sub-strip part is used to extend to the outermost side of the high-temperature superconducting coil in the radial direction. On this basis, the second sub-strip part is attached to the outermost side of the superconducting turns.

[0071] In this way, on the one hand, the partial structure of the heat sink (the first base and the second strip part of the second base) is attached flat to the outer surface of the superconducting turns of the corresponding layer, so that the heat generated inside the superconducting turns can be transmitted to the part attached by the heat sink. On the other hand, since the other part of the heat sink (the first strip part of the second base) is led out in the radial direction of the high-temperature superconducting coil, the heat generated inside the superconducting turns can be conducted to the outermost side of the high-temperature superconducting coil in time through the first strip part. Generally, the outermost side of the high-temperature superconducting coil is usually provided with a high-thermal-conductivity connecting structure, so that the heat conducted by the heat sink of the present application can be taken away in time.

[0072] Corresponding to the above structure, mainly referring to FIGS. 3 to 11, in a possible implementation, the manufacturing method of the heat sink assembly for the high-temperature superconducting coil mainly includes the following steps:

[0073] S10, assuming that the inner diameter of the superconducting turns to be wound is R in , the radial thickness is D, and the axial length is L. According to the radial thickness of the superconducting turns, the superconducting turns can be divided into a plurality of groups in the radial thickness direction. Generally, the radial thickness of a single group does not exceed 30 mm, so the number of groups of the superconducting turns wherein, represents the upward integer. First, the first group of superconducting turns (the innermost group of superconducting turns 12) is wound on the coil former 11 of the high-temperature superconducting coil 100 (the winding method is basically the same as that of the conventional high-temperature superconducting coil, and the structure after winding is shown in FIG. 3.

[0074] S20, heat sink preparation. Since in the present example, the general structure of the multi-layer heat sink corresponding to each group of superconducting turns and the way of making are basically the same, the following will not be distinguished, that is, the following will be described by taking one of the heat sinks as an example. In the present example, the heat sink is made of a non-metallic material fiber cloth (such as carbon fiber cloth) with high thermal conductivity. For example, the raw material of the heat sink is a rectangular structure of carbon fiber cloth. In order to avoid the carbon fiber cloth being too thick to affect the flatness of the surface of the high temperature superconducting coil, the thickness of the carbon fiber cloth is usually 0.2-0.5mm. On this basis, for example, the following steps can be taken:

[0075] 21) cut out (N-1) pieces of carbon fiber cloth, where N is the number of the aforementioned grouping of superconducting turns; the length of the carbon fiber cloth is L (basically the same as the axial length of the superconducting turns); the width is W i (i = 1, 2,..., N-1), in the present example, W i = 2π(R in +iD / N), to ensure that the first base body of the cut-out carbon fiber cloth can completely wrap the outer surface of the superconducting turns of a certain group in the circumferential direction, that is, the first base body in the assembled state is a cylindrical / annular structure surrounding the outer surface of the superconducting turns of a certain group.

[0076] 22) After cutting, it is cut along the length direction (refer to FIG. 4 and FIG. 5). For example, in the present example, the cutting is such that the first strip-shaped part and the second strip-shaped part are in a substantially uniform distribution. Among them, the number of carbon fiber cloth strips (first strip-shaped structure) after cutting can be selected according to the actual width W i of the carbon fiber cloth, for example, the width W0 of the carbon fiber cloth strip (first strip-shaped structure) can be selected to be not more than 10mm, then the number of carbon fiber cloth strips is 2N-1, the length L i of the carbon fiber cloth strip is iL / (2N-1), where i represents the i-th layer (from inside to outside, i = 1, 2,..., N-1) of the heat sink.

[0077] S30, the cut carbon fiber cloth can be folded in the manner shown in FIG. 6 to form a pair of second base body strip-shaped gaps, first strip-shaped parts and second strip-shaped parts, that is, all the fiber cloth strips are spaced and divided into 2 groups, one group is the second strip-shaped part maintaining the original cloth surface direction (extending along the axial direction of the high temperature superconducting coil), the other group is bent according to the direction perpendicular to the cloth surface (bent along the radial direction of the high temperature superconducting coil), thereby forming the first strip-shaped part comprising the first sub-strip-shaped part (extending along the radial direction of the high temperature superconducting coil) and the second sub-strip-shaped part (extending along the axial direction of the high temperature superconducting coil at the outermost side of the high temperature superconducting coil).

[0078] S40, winding of the superconducting wire turns and installation of the heat sink. As this step further mainly includes the following steps:

[0079] 41) Installation of the first layer of heat sink (the innermost layer of heat sink) (see Fig. 7). The planar part (the first base body) of the heat sink is attached to the outer surface of the first group of superconducting wire turns, and the attachment should ensure flatness and no wrinkles.

[0080] 42) After the installation of the first layer of heat sink, continue to wind the second group of superconducting wire turns next to the outside of the first layer of heat sink (see Fig. 8), and the winding method is basically the same as that of the first group of superconducting wire turns.

[0081] 43) Installation of the i-th layer of heat sink. In the case where the number of groups of superconducting wire turns N is greater than 2, the i-th group of superconducting wire turns can be configured with the i-th layer of heat sink (see Fig. 9). Similar to the first and second layers of heat sink, the planar part (the first base body) of the i-th layer of heat sink is attached to the outer surface of the i-th group of superconducting wire turns, and similarly, the attachment should ensure flatness and no wrinkles.

[0082] 44) After the installation of the i-th layer of heat sink, continue to wind the i+1-th group of superconducting wire turns next to the outside of the i-th layer of heat sink (see Fig. 10), and the winding method is basically the same as that of the first group of superconducting wire turns.

[0083] 45) Continue to wind the high-temperature superconducting coil (see Fig. 11). After the winding of the superconducting wire turns is completed, the second sub-strip of the first strip is folded along the axial direction of the high-temperature superconducting coil and then attached flatly to the outermost side of the high-temperature superconducting coil.

[0084] It can be seen that in the preferred embodiment of the present application, through the combination of the first base body and the second base body, the heat generated inside the superconducting wire turns can be effectively and promptly released by the heat sink. Specifically:

[0085] (1) By dividing the superconducting wire turns into multiple groups and configuring a heat sink for each group of superconducting wire turns, and by providing a pair of second base bodies on each heat sink, it is possible to promptly and quickly export the heat generated in the central region of the superconducting wire turns through multiple heat sinks. On this basis, by covering the first base body as comprehensively as possible to the circumferential outer surface of the corresponding group of superconducting wire turns, it is possible to better export the heat.

[0086] (2) Based on the first strip of the second base body of the heat sink, a part of the heat generated inside the superconducting wire turns can be exported from the inside of the superconducting wire turns to the outermost side of the high-temperature superconducting coil. Since the outermost side of the high-temperature superconducting coil usually has a high-thermal-conductivity connecting structure, based on the provision of the first strip, the heat exported by the heat sink can be promptly and quickly taken away through the first strip.

[0087] (3) Based on the first base and the second base of the second strip-shaped part, a part of the heat generated inside the superconducting wire turns can be promptly diffused to the periphery. Specifically, the temperature highest point is the shortest plate of the entire high-temperature superconducting coil, and dispersing the heat to other parts can reduce the temperature highest point to a certain extent, thus it is expected to improve the thermal stability of the high-temperature superconducting coil to a certain extent. For example, assuming that the stable operation temperature of the high-temperature superconducting coil is 10K, and the highest allowable operation temperature is 15K, at this time the high-temperature superconducting coil has a temperature margin of 15K-10K=5K. If the local temperature of the high-temperature superconducting coil is 12K, then the temperature margin of the high-temperature superconducting coil becomes 15K-12K=3K. If the heat is dispersed, for example, the temperature of the periphery becomes 10.5K after the heat is dispersed, but at this time the temperature margin is 15K-10.5K=4.5K, so this processing method still improves the thermal stability of the high-temperature superconducting coil to a certain extent.

[0088] (4) In addition, the carbon fiber cloth, as a porous material, can be well bonded with the curing material such as epoxy resin during the curing process of the high-temperature superconducting coil (for example, the carbon fiber cloth can be used as the skeleton fiber structure of the resin curing). In this way, after it is introduced into the present application as a heat sink, it can not only efficiently realize heat conduction, but also further improve the overall structural strength of the high-temperature superconducting coil.

[0089] Although the specific embodiments of the present application are described above with reference to the accompanying drawings, the present application is not limited to the above-described embodiments, and various modifications or changes can be made by those skilled in the art without departing from the scope of the present application.

Claims

1. A heat sink assembly for a high temperature superconducting coil, characterized by, The high-temperature superconducting coil comprises superconducting turns, the superconducting turns comprise one or more groups arranged along a radial direction of the high-temperature superconducting coil; The heat sink assembly comprises at least one heat sink, the heat sink comprises a heat sink base, the heat sink base extends a strip-shaped gap along a first direction, the heat sink base extends a first strip-shaped part along a second direction, and In the assembled state: At least a part of the heat sink base and the strip-shaped gap is on one side surface of one group of the superconducting turns along a radial direction thereof; At least a part of the first strip-shaped part has an included angle with one side surface of one group of the superconducting turns along a radial direction thereof.

2. The heat sink assembly of claim 1, wherein, The heat sink base extends a second strip-shaped part along the first direction, and the strip-shaped gap is formed between adjacent second strip-shaped parts.

3. The heat sink assembly of claim 1, wherein, In the assembled state, the heat sink base extends a plurality of strip-shaped gaps along an axial direction of the high-temperature superconducting coil.

4. The heat sink assembly of claim 1, wherein, The first strip-shaped part comprises: A first sub-strip-shaped part, which, in the assembled state, is extended by the heat sink base along the second direction; and A second sub-strip-shaped part, which, in the assembled state, is extended by the first sub-strip-shaped part along a third direction having an included angle with the second direction.

5. The heat sink assembly of claim 4, wherein, The first sub-strip-shaped part is extended by the heat sink base along a radial direction of the high-temperature superconducting coil; and / or The second sub-strip-shaped part is extended by the first sub-strip-shaped part along an axial direction of the high-temperature superconducting coil.

6. The heat sink assembly of claim 4, wherein, The first sub-strip-shaped part and the second sub-strip-shaped part can be accommodated in the corresponding strip-shaped gap in the state of being unfolded in the same plane.

7. The heat sink assembly of claim 6, wherein, The strip-shaped gap is formed on the heat sink base at the same time as the first strip-shaped part is cut out; and / or The heat sink base is a flexible structure.

8. The heat sink assembly of claim 2, wherein, The heat sink base comprises a first base and at least one second base arranged on the first base; The first strip-shaped part and the second strip-shaped part are arranged on or formed on the second base, and the first base can cover at least a part of one side surface of one group of the superconducting turns along a radial direction thereof.

9. The heat sink assembly of claim 8, wherein, In the assembled state, two ends of the first base are respectively provided with the second base as viewed along an axial direction of the high-temperature superconducting coil.

10. A high temperature superconducting coil, characterized by, The high-temperature superconducting coil comprises the heat sink assembly for a high-temperature superconducting coil according to any one of claims 1 to 9.

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