A new conduction cooling structure for superconducting magnets

Abstract

The present invention discloses a novel conductive cooling structure for superconducting magnets, belonging to the technical field of superconducting motors. The structure comprises a first copper plate, a second copper plate, a connecting copper block, and a copper braid. The first and second copper plates are arranged relative to each other on the upper and lower surfaces of the superconducting magnet to form a magnet support cooling skeleton. Connecting copper blocks are symmetrically arranged on both sides of the skeleton. The connecting copper blocks are symmetrically arranged on both sides of the skeleton and include a supporting portion and an extension portion. The supporting portion is arranged between the first and second copper plates, and the extension portion is arranged outside the supporting portion and bends and extends toward the bottom of the second copper plate. The two ends of the copper braid are connected to the symmetrically arranged extension portions of the connecting copper blocks. The structure of the present invention greatly enhances the utilization of cooling medium, achieves significant cooling effect, and has a simple structure, easy processing, and low cost.

Description

Technical Field

[0001] The present invention belongs to the technical field of superconducting motors, and more particularly, relates to a novel superconducting magnet conductive cooling structure. Background Art

[0002] Superconducting motors, with their advantages of compact size, high power density, and high efficiency, hold great promise for applications in aviation propulsion, marine propulsion, and wind power. As key components in superconducting motors, superconducting field coils require a specified temperature for proper operation. The ability of the magnet cooling structure to cool the superconducting magnet to its specified operating temperature is crucial to the safety and reliability of the subsequent superconducting motor operation.

[0003] Currently, the commonly used cooling methods for superconducting magnets are forced convection cooling and conduction cooling. Forced convection cooling uses a forced flow device (i.e., a pump body) to force the cooling medium to flow through the cooling structure built into the cryogenic system. The cold is introduced into the superconducting magnet through forced convection heat exchange, and then flows back to the cold source to achieve the purpose of circulating refrigeration. Generally, no phase change of the cooling medium occurs during the cooling process, and forced convection cooling has lower cooling medium consumption. However, improper design of the cooling circuit can easily cause uneven cooling. Conduction cooling refers to the direct contact between the superconducting tape and the cold head of the refrigerator or heat transfer through the connection of the conduction cooling structure. A flexible copper structure is often added between the cold head and the superconducting tape for connection. The cold head contact conduction cooling has high efficiency, simple structure, and no risk of leakage, but it also requires a reasonable conduction cooling design to ensure the cooling effect of the superconducting magnet.

[0004] At present, the temperature uniformity of the conductive cooling of conventional wind-powered superconducting electric motors is problematic. Therefore, it is urgent to develop a new conductive cooling structure for wind-powered superconducting electric motors. Summary of the Invention

[0005] In response to the above defects or improvement needs of the prior art, the present invention provides a novel conductive cooling structure for a superconducting magnet, thereby solving the technical problem of uneven cooling of the conductive cooling structure.

[0006] To achieve the above object, according to one aspect of the present invention, a novel superconducting magnet conductive cooling structure is provided, comprising: a first copper plate, a second copper plate, a connecting copper block and a copper braid;

[0007] The first copper plate and the second copper plate are arranged oppositely on the upper and lower surfaces of the superconducting magnet to form a magnet support cooling frame; connecting copper blocks are symmetrically arranged on both sides of the frame;

[0008] The connecting copper blocks are symmetrically arranged on both sides of the frame, and the connecting copper blocks include a supporting portion and an expanding portion, wherein the supporting portion is arranged between the first copper plate and the second copper plate, and the expanding portion is arranged outside the supporting portion and bends and extends toward the bottom of the second copper plate;

[0009] Both ends of the copper braid are connected to the extended portions of the connecting copper blocks which are symmetrically arranged.

[0010] Preferably, the expansion portion is a J-shaped structure, with the longer end thereof being located at the bottom of the second copper plate and arranged parallel to the second copper plate.

[0011] Preferably, a plurality of connecting copper blocks are symmetrically provided along both sides of the skeleton.

[0012] Preferably, a plurality of copper braids are spaced apart along the bottom of the second copper plate.

[0013] Preferably, the length of the copper braid is adjustable.

[0014] Preferably, the bottom of the copper braid is connected to a cold head, and the cold head is used to generate cold energy, and the cold energy is conducted to the superconducting magnet through a cooling structure.

[0015] In general, the above technical solutions conceived by the present invention can achieve the following beneficial effects compared with the prior art:

[0016] 1. The novel superconducting magnet conductive cooling structure proposed in the present invention expands the contact area between the magnet cooling structure and the cooling copper braid by introducing a connecting copper block structure, thereby increasing the heat conduction path within the magnet, making the conductive cooling more uniform and improving the cooling efficiency.

[0017] 2. The novel superconducting magnet conductive cooling structure proposed in the present invention can achieve a lower temperature gradient of the magnet by introducing a copper braid structure and adjusting the length of the copper braid.

[0018] 3. The novel superconducting magnet conductive cooling structure proposed in the present invention greatly enhances the utilization of the cooling medium, has a significant cooling effect, and has a simple structure, is easy to process, and has a low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the novel superconducting magnet conduction cooling structure of the present invention;

[0020] Figure 2 It is a structural schematic diagram of the novel superconducting magnet conduction cooling structure of the present invention;

[0021] Figure 3 It is a schematic diagram of the structure of connecting copper blocks in an embodiment of the novel superconducting magnet conductive cooling structure of the present invention.

[0022] In all the drawings, the same reference numerals are used to denote the same elements or structures, wherein: 1 - first copper plate; 2 - second copper plate; 3 - connecting copper block; 31 - supporting portion; 32 - expanding portion; 4 - copper braid; 5 - superconducting magnet; 6 - cold head. DETAILED DESCRIPTION

[0023] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for the purpose of explaining the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

[0024] like Figure 1 and Figure 2 As shown, the present invention proposes a novel superconducting magnet conductive cooling structure, which consists of a first copper plate 1, a second copper plate 2, a connecting copper block 3, and a copper braid 4. The first copper plate 1 and the second copper plate 2 are arranged on the upper and lower surfaces of the superconducting magnet 5 relative to each other, thereby forming a magnet support cooling skeleton. Connecting copper blocks 3 are symmetrically arranged on both sides of the cooling skeleton, and the two ends of the copper braid 4 are connected to the symmetrically arranged connecting copper blocks 3. The bottom of the copper braid 4 is connected to a cold head 6, which is used to generate cold energy. The cold energy is conducted to the superconducting magnet 5 through the cooling structure.

[0025] Specifically, such as Figure 3 As shown, the connecting copper block 3 can be divided into two parts. The upper block structure is the support portion 31, which is used to support the first copper plate 1 and the second copper plate 2 and also serves as a cooling path. The lower J-shaped curved portion is the expansion portion 32. Due to the limited space in the superconducting motor rotor, it is difficult to install the copper braid structure to the copper plate when conductive cooling is used. The copper braid requires a large contact area with the cooled object to achieve better cooling performance. Therefore, the provision of the expansion portion 32 provides an area for conductive cooling to connect with the copper braid.

[0026] As a preferred embodiment of the present invention, a plurality of connecting copper blocks 3 are symmetrically provided along both sides of the skeleton.

[0027] As a preferred embodiment of the present invention, a plurality of copper braids 4 are provided at intervals along the bottom of the second copper plate 2 .

[0028] As a preferred embodiment of the present invention, the length of the copper braid 4 is adjustable.

[0029] The cold conduction path of the conductive cooling structure proposed in the present invention is as follows: the cold head 6 is connected to the copper braid 4, the copper braid 4 is connected to the extension portion 32 of the connecting copper block 3, the support portion 31 of the connecting copper block 3 is connected to the first copper plate 1 and the second copper plate 2, and the first copper plate 1 and the second copper plate 2 maintain good thermal contact with the superconducting magnet 5. The cold energy is generated by the cold head 6 and conducted into the superconducting magnet 5 via the copper braid 4, the connecting copper block 3, the first copper plate 1, and the second copper plate 2. For applications requiring a low temperature gradient of the magnet, the lengths of the copper braids 4 connected to the connecting copper block 3 can be made equal to provide equal copper braid hot end temperatures, thereby achieving a low temperature gradient of the superconducting magnet.

[0030] It will be easily understood by those skilled in the art that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A novel superconducting magnet conductive cooling structure, characterized in that: include: A first copper plate (1), a second copper plate (2), a connecting copper block (3) and a copper braid (4); The first copper plate (1) and the second copper plate (2) are arranged on the upper and lower surfaces of the superconducting magnet (5) to form a magnet support cooling skeleton; connecting copper blocks (3) are symmetrically provided on both sides of the skeleton; The connecting copper block (3) is symmetrically arranged on both sides of the skeleton, and the connecting copper block (3) includes a supporting portion (31) and an expanding portion (32), wherein the supporting portion (31) is arranged between the first copper plate (1) and the second copper plate (2), and the expanding portion (32) is arranged outside the supporting portion (31), and the expanding portion (32) bends and extends toward the bottom of the second copper plate (2); Both ends of the copper braid (4) are connected to the symmetrically arranged extension portions (32) of the connecting copper block (3).

2. A novel superconducting magnet conductive cooling structure according to claim 1, characterized in that: The expansion portion (32) is a J-shaped structure, with the longer end thereof being located at the bottom of the second copper plate (2) and being arranged parallel to the second copper plate (2).

3. A novel superconducting magnet conductive cooling structure according to claim 2, characterized in that: A plurality of connecting copper blocks (3) are symmetrically arranged along both sides of the skeleton.

4. A novel superconducting magnet conductive cooling structure according to claim 3, characterized in that: A plurality of the copper braids (4) are spaced apart along the bottom of the second copper plate (2).

5. A novel superconducting magnet conductive cooling structure according to claim 4, characterized in that: The length of the copper braid (4) is adjustable.

6. A novel superconducting magnet conductive cooling structure according to claim 5, characterized in that: The bottom of the copper braid (4) is connected to a cold head (6), and the cold head (6) is used to generate cold energy, and the cold energy is conducted to the superconducting magnet (5) through a cooling structure.

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