Superconducting magnet support structure

Abstract

A superconducting magnet support structure, comprising: a support assembly and an enclosure assembly. A superconducting magnet is arranged on the support assembly; the support assembly comprises a rotor yoke (11) and two support members (12); one support member (12) has one end connected to one end of the rotor yoke (11), and the other end connected to a first rotating shaft; the other support member (12) has one end connected to the other end of the rotor yoke (11), and the other end connected to a second rotating shaft; the enclosure assembly comprises two side plates (21) and two end plates (22); the two side plates (21) are respectively arranged on two sides of the superconducting magnet; the two end plates (22) are arranged at two ends of the superconducting magnet; one end plate (22) has the upper part connected to one end of each side plate (21), and the lower part connected to one support member (12); the other end plate (22) has the upper part connected to the other ends of the side plates (21), and the lower part connected to the other support member (12). The problem that rotor magnet support structures cannot effectively and stably support superconducting magnets and have poor support effects is solved.

Description

A superconducting magnet support structure

[0001] Related Art Cross Reference

[0002] The present application claims priority to the Chinese patent application No. 202410864052.7, filed on June 28, 2024, and entitled "A superconducting magnet support structure", the whole content of which is incorporated herein by reference. TECHNICAL FIELD

[0003] The present application relates to the technical field of superconducting electric machines, in particular to a superconducting magnet support structure. BACKGROUND

[0004] A superconducting electric machine is an electric machine using superconducting material to make stator or rotor magnets. It applies the characteristic of zero resistance of superconducting material, so that the superconducting magnets made of superconducting material can pass through a current much larger than the conventional copper winding, thereby significantly improving the power density and torque density of the electric machine, and significantly reducing the weight and size of the electric machine. Based on the above advantages, superconducting electric machines are often used in the fields of wind power generation, ship propulsion, aircraft engines, etc.

[0005] Taking a superconducting electric machine with superconducting magnets as rotor magnets as an example, each superconducting magnet will generate a strong electromagnetic force when working in the electric machine, and also bear a strong electromagnetic force acting on it from other superconducting magnets, so a support structure is needed to support the superconducting magnets. The existing superconducting magnet support structure is to set two torque tubes at both ends of the superconducting magnet, and connect the superconducting magnet and the rotating shaft through the torque tubes, that is, one end of the torque tube is connected to the superconducting magnet, and the other end is connected to the rotating shaft. However, in this support structure, the torque tube mainly plays a connecting role and cannot effectively and stably support the superconducting magnet, so the support effect is poor. SUMMARY

[0006] Therefore, the technical problem to be solved by the present application is to overcome the defect that the rotor magnet support structure in the prior art cannot effectively and stably support the superconducting magnet, and the support effect is poor, so as to provide a superconducting magnet support structure with good support effect.

[0007] In order to solve the above problems, the present application provides a superconducting magnet support structure, comprising:

[0008] A support assembly, the superconducting magnet is arranged on the support assembly, the support assembly comprises a rotor yoke and two support pieces, one end of one of the support pieces is connected to one end of the rotor yoke, and the other end is connected to a first rotating shaft, one end of the other support piece is connected to the other end of the rotor yoke, and the other end is connected to a second rotating shaft;

[0009] The enclosure assembly comprises two side plates and two end plates, the two side plates are arranged on the two sides of the superconducting magnet respectively, and the two end plates are arranged on the two ends of the superconducting magnet, wherein the upper part of one of the end plates is connected with one end of the side plate, and the lower part is connected with one of the support members, the upper part of the other end plate is connected with the other end of the side plate, and the lower part is connected with the other support member.

[0010] Optionally, the superconducting magnet support structure further comprises a filling assembly, the filling assembly comprises a heat insulation filling layer arranged between the superconducting magnet and the support assembly.

[0011] Optionally, the filling assembly further comprises a Dewar arranged between the bottom surface of the heat insulation filling layer and the top surface of the support member, the Dewar comprises a Dewar outer layer and a Dewar inner layer, and a vacuum is arranged between the Dewar outer layer and the Dewar inner layer, the Dewar outer layer is close to the side of the support member, and the Dewar inner layer is close to the side of the heat insulation filling layer.

[0012] Optionally, the support assembly further comprises a support connecting member arranged on the rotor yoke, the support connecting member has a threaded hole, and a fastener passes through the superconducting magnet and is threadedly connected with the threaded hole.

[0013] Optionally, the support member comprises a support part and first and second connecting parts extending downward along the two sides of the support part.

[0014] The upper end of the first connecting part of one of the support members is connected with one of the end plates, and the lower end is connected with the first rotating shaft, and the second connecting part is connected with one end of the rotor yoke.

[0015] The upper end of the first connecting part of the other support member is connected with the other end plate, and the lower end is connected with the second rotating shaft, and the second connecting part is connected with the other end of the rotor yoke.

[0016] Optionally, the first connecting part is connected with the first rotating shaft and the second rotating shaft through a connecting member.

[0017] Optionally, the end plate is provided with a slot on the two sides, and the end part of the side plate is inserted into the slot.

[0018] Optionally, the slot is provided with a protrusion on the side wall facing the side plate, the side plate is provided with a clamping groove on the side wall facing the protrusion, and the protrusion is clamped with the clamping groove.

[0019] Optionally, the side plate comprises a side plate part and a cover plate part arranged at an included angle, the included angle is greater than or equal to 90°, and the side plate part is arranged on the heat insulation filling layer.

[0020] Optionally, the end plate comprises an outer shell and a filler arranged in the outer shell.

[0021] The present application has the following advantages:

[0022] 1. The superconducting magnet support structure provided by the present application comprises a support assembly and an enclosure assembly. The superconducting magnet is arranged on the support assembly, and the support assembly comprises a rotor yoke and two support members, one end of one of the support members is connected to one end of the rotor yoke, and the other end is connected to a first rotating shaft, one end of the other support member is connected to the other end of the rotor yoke, and the other end is connected to a second rotating shaft; the enclosure assembly comprises two side plates arranged on the two sides of the superconducting magnet and two end plates arranged at the two ends of the superconducting magnet, one of the end plates is connected to one end of the side plate at the upper part and connected to one of the support members at the lower part, and the other end plate is connected to the other end of the side plate at the upper part and connected to the other support member at the lower part. This support structure has two stress transmission paths, one is from the superconducting magnet to the rotor yoke, then from the rotor yoke to the support members, and then to the first rotating shaft and the second rotating shaft; the other is from the superconducting magnet to the side plates on both sides, then to the two end plates, and then to the support members, and finally to the first rotating shaft and the second rotating shaft. The two stress transmission paths can produce different stress distributions, have good torque transmission capacity, can decompose and offset the electromagnetic force received by the superconducting magnet, realize stable support of the superconducting magnet, and have good support effect.

[0023] 2. The superconducting magnet support structure provided by the present application further comprises a filling assembly, the filling assembly comprises a heat insulation filling layer arranged between the superconducting magnet and the support assembly and a Dewar arranged between the bottom surface of the heat insulation filling layer and the top surface of the support member. The Dewar comprises an outer layer and an inner layer, and a vacuum is formed between the outer layer and the inner layer, the outer layer is close to the support member, and the inner layer is close to the heat insulation filling layer. By arranging the filling assembly, the heat leakage from the magnet and the support assembly is reduced, so that the superconducting magnet can be kept in a low-temperature environment for normal operation.

[0024] 3. The superconducting magnet support structure provided by the present application, wherein the support assembly further comprises a support connecting member arranged on the rotor yoke, the support connecting member has a threaded hole, and a fastener passes through the superconducting magnet and is threadedly connected with the threaded hole. The superconducting magnet is fixed by the fastener and the support connecting member, which is convenient and fast, and the torque is transmitted to the rotor yoke through the support connecting member, so that the heat insulation filling layer is not subjected to stress.

[0025] 4. The superconducting magnet support structure provided by the present application, wherein the support member comprises a support part and first and second connecting parts extending downward along the two sides of the support part. The support part with this shape not only reduces the consumption of materials, reduces the weight, but also reduces the cross-sectional area and the heat leakage of the support member.

[0026] 5. The superconducting magnet support structure provided in the application, the end plate is provided with a slot on both sides, and the end of the side plate is inserted into the slot. And the slot is provided with a protrusion on the side wall facing the side plate, and the side plate is provided with a clamping groove on the side wall facing the protrusion, and the protrusion and the clamping groove are connected. This connection structure can realize the fastening connection of the end plate and the side plate, and is convenient to disassemble and assemble. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the specific embodiments or prior art of the present application, the drawings needed in the description of the specific embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0028] Fig. 1 is an isometric view of the superconducting magnet support structure of the present application;

[0029] Fig. 2 is a front view of the superconducting magnet support structure of the present application;

[0030] Fig. 3 is a sectional view of the superconducting magnet support structure of the present application;

[0031] Fig. 4 is a schematic view of the superconducting magnet support structure of the present application, in which one side plate and one cover plate are hidden;

[0032] Fig. 5 is a schematic view of the support member in the superconducting magnet support structure of the present application.

[0033] Explanation of reference signs: 11, rotor yoke, 12, support member, 121, support part, 122, first connecting part, 123, second connecting part, 13, support connecting member, 14, fastener; 21, side plate, 211, clamping groove, 212, side plate part, 213, cover plate part, 22, end plate, 221, protrusion; 31, thermal insulation filling layer; 4, connecting member. DETAILED DESCRIPTION

[0034] The technical solutions of the present application will be described in detail below in conjunction with the drawings. Obviously, the described embodiments are some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0035] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings based on the orientation or positional relationship, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" are only for the purpose of description and cannot be understood as indicating or implying relative importance.

[0036] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0037] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as there is no conflict.

[0038] As shown in FIGS. 1-3, the superconducting magnet support structure of the present application is suitable for supporting the superconducting magnet in the superconducting motor, and the superconducting magnet support structure has a good torque transmission path and can realize stable support of the superconducting magnet.

[0039] The superconducting magnet support structure comprises a support assembly and an enclosure assembly. The support assembly comprises a rotor yoke 11 and two support pieces 12, which are symmetrically arranged at two ends of the rotor yoke 11 and have the same structure. Specifically, one end of one support piece 12 is connected with one end of the rotor yoke 11, and the other end is connected with the first rotating shaft; one end of the other support piece 12 is connected with the other end of the rotor yoke 11, and the other end is connected with the second rotating shaft. The superconducting magnet is arranged on the support assembly, and two ends of the superconducting magnet are located on the two support pieces 12, and the remaining part is located on the rotor yoke 11. The enclosure assembly comprises two side plates 21 and two end plates 22, the two side plates 21 are arranged on the two sides of the superconducting magnet respectively, and the two end plates 22 are arranged at the two ends of the superconducting magnet. The upper part of one end plate 22 is connected with one end of the side plate 21, and the lower part is connected with one support piece 12; the upper part of the other end plate 22 is connected with the other end of the side plate 21, and the lower part is connected with the other support piece 12. Firstly, the support structure realizes the full-range limiting of the superconducting magnet, and secondly, the support structure has two stress transmission paths. The first stress transmission path is from the superconducting magnet to the rotor yoke 11, then from the rotor yoke 11 to the two support pieces 12, and then from the two support pieces 12 to the first rotating shaft and the second rotating shaft; the second stress transmission path is from the superconducting magnet to the two side plates 21, then from the two side plates 21 to the two end plates 22, then from the two end plates 22 to the two support pieces 12, and finally from the two support pieces 12 to the first rotating shaft and the second rotating shaft. The two stress transmission paths can produce different stress distributions, have good torque transmission capacity, can decompose and offset the electromagnetic force generated and received by the superconducting magnet, realize the stable support of the superconducting magnet, and have good support effect.

[0040] Optionally, as shown in FIG. 5, the support piece 12 is preferably a torque tube, which comprises a support part 121 and a first connecting part 122 and a second connecting part 123 extending downward along two sides of the support part 121. The first connecting part 122 and the second connecting part 123 are in the shape of a sector, that is, the top surface of the first connecting part 122 and the second connecting part 123 is a curved surface, and the shape of the support part 121 is arc-shaped. In addition, the length of the first connecting part 122 is smaller than the length of the second connecting part 123.

[0041] The upper end of the first connecting part 122 of one support piece 12 is connected with one end plate 22, the lower end is connected with the first rotating shaft, and the second connecting part 123 is connected with one end of the rotor yoke 11. The upper end of the first connecting part 122 of the other support piece 12 is connected with the other end plate 22, the lower end is connected with the second rotating shaft, and the second connecting part 123 is connected with the other end of the rotor yoke 11. The shape of the second connecting part 123 corresponds to the shape of the rotor yoke 11, and the cross section of the second connecting part 123 is the same in size as the end surface of the rotor yoke 11.

[0042] Optionally, the first connecting part 122 is connected with the first rotating shaft and the second rotating shaft through the connecting piece 4. The first rotating shaft and the second rotating shaft correspond to two shafts of the superconducting motor rotor, one of which is a driving shaft, and the driving shaft can be connected with a driven device such as a gear box, and the other is a driven shaft, which provides radial and axial support for the rotor. Specifically, the first connecting part 122 and the end plate 22 and the first connecting part 122 and the connecting piece 4 are connected by bolts, and the second connecting part 123 and the rotor yoke 11 are also connected by bolts.

[0043] The support assembly further comprises a support connecting piece 13 arranged on the rotor yoke 11, the support connecting piece 13 having a threaded hole, and a fastener 14 passing through the superconducting magnet and being threadedly connected with the threaded hole. Specifically, the support connecting piece 13 is in a cylindrical shape and is fixedly arranged on the rotor yoke 11. In this embodiment, the number of support connecting pieces 13 is two, which are arranged at intervals along the length direction of the rotor yoke 11. A counterbore is formed on the superconducting magnet, and the fastener 14 is preferably a countersunk bolt. When the superconducting magnet is installed, the counterbore on the superconducting magnet is aligned with the threaded hole of the support connecting piece 13, and then the superconducting magnet and the support connecting piece 13 are connected together by the countersunk bolt. In this embodiment, the support connecting piece 13 is made of epoxy glass fiber which has large mechanical strength and small thermal conductivity, so it has high strength, can well transmit torque, and can also reduce heat leakage.

[0044] In other embodiments, the number of support connecting pieces 13 can also be three, four, etc.

[0045] Optionally, the superconducting magnet support structure further comprises a filling assembly, which comprises a heat insulation filling layer 31 arranged between the superconducting magnet and the support assembly. The heat insulation filling layer 31 covers the area of the rotor yoke 11 and the two support pieces 12, and a hole is formed on the heat insulation filling layer 31 to accommodate the support connecting piece 13. The heat insulation filling layer 31 mainly plays a heat insulation function to reduce external heat leakage, and is made of epoxy glass fiber. Although the heat insulation filling layer 31 is arranged below the superconducting magnet, it does not play a supporting role, but torque transmission is performed by the support connecting piece 13.

[0046] The filling assembly further comprises a Dewar arranged between the bottom surface of the heat insulation filling layer 31 and the top surface of the support piece 12. The Dewar has a double-layer structure, comprising a Dewar outer layer and a Dewar inner layer, and a vacuum is formed between the Dewar outer layer and the Dewar inner layer. The Dewar outer layer is close to the support piece 12, and the Dewar inner layer is close to the heat insulation filling layer 31. The Dewar also plays a heat insulation role.

[0047] As shown in FIG. 4, the end plate 22 in the enclosing assembly comprises an outer shell and a filler arranged in the outer shell. In this embodiment, the outer shell is made of steel, and the filler inside is made of epoxy glass fiber material, forming a Dewar structure with heat insulation function. In addition, the end plate 22 is provided with a slot on both sides, which is convenient for connecting with the side plate 21.

[0048] The side plate 21 comprises a side plate part 212 and a cover plate part 213 arranged at an included angle, and the included angle is greater than or equal to 90°. Specifically, the side plate part 212 is arranged on the heat insulation filling layer 31, one end of the cover plate part 213 is connected to the top end of the side plate part 212, and the other end extends to the side plate 21 on the opposite side. In this embodiment, the included angle between the side plate part 212 and the cover plate part 213 is obtuse, that is, the cover plate part 213 is inclined upward from the side of the side plate part 212 connected to it to the side away from the side plate part 212. In addition, the size of the side plate part 212 gradually decreases from the top end to the bottom end. In addition, the length of the side plate part 212 is greater than the length of the cover plate part 213, that is, the cover plate part 213 does not extend to the positions of both ends of the side plate part 212, so that both ends of the side plate part 212 can be inserted into the insertion slot of the end plate 22 to be connected to the end plate 22.

[0049] Optionally, the side wall of the insertion slot towards the side plate 21 is provided with a protrusion 221, and the side wall of the side plate 21 towards the protrusion 221 is provided with a clamping groove 211. When the side plate part 212 is inserted into the insertion slot of the end plate 22, the protrusion 221 and the clamping groove 211 are clamped.

[0050] The superconducting magnet support structure is mainly used for installing the superconducting magnet, and the superconducting magnet needs to work in a low-temperature environment of 30K (K is the unit of temperature Kelvin) to 70K, otherwise the superconducting magnet will lose superconducting ability. This superconducting magnet support structure not only has good support effect and can stably support the superconducting magnet, but also has small heat leakage and can ensure the low-temperature working environment of the superconducting magnet. Specifically, the two stress transmission paths of the superconducting magnet support structure (the first stress transmission path is from the superconducting magnet to the rotor yoke 11, then from the rotor yoke 11 to the two support pieces 12, and then from the two support pieces 12 to the first rotating shaft and the second rotating shaft; the second stress transmission path is from the superconducting magnet to the two side plates 21, then from the two side plates 21 to the two end plates 22, then from the two end plates 22 to the two support pieces 12, and finally from the two support pieces 12 to the first rotating shaft and the second rotating shaft) are both stress transmission paths and heat leakage transmission paths. When the motor works, the outside will conduct heat through the components of the support structure and leak heat. First, the overall structure of the support structure is long strip-shaped, which prolongs the heat transmission path and reduces the heat leakage efficiency. Second, the cross-sectional area of the approximately n-shaped support piece 12 and the approximately L-shaped side plate 21 is relatively small, which reduces the heat receiving area and reduces the heat leakage. Finally, on the heat leakage transmission path, the heat insulation filling layer 31 made of heat insulation material (epoxy resin glass fiber) with small thermal conductivity, the end plate 22 and the like also greatly hinder the heat leakage from the outside to the support device. Therefore, this superconducting magnet support structure not only has good support performance, but also has small heat leakage, and can ensure that the superconducting magnet works normally in a low-temperature environment.

[0051] Obviously, the above embodiments are merely example for clearly illustrating but not limitation to the embodiments. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, all the embodiments need not and can not be enumerated. The obvious changes or variations extended from the above description are still within the protection scope of the patent application.

Claims

1. A superconducting magnet support structure, characterized in that, include: A support assembly is provided, on which a superconducting magnet is disposed. The support assembly includes a rotor yoke (11) and two support members (12). One end of one support member (12) is connected to one end of the rotor yoke (11) and the other end is connected to a first rotating shaft. One end of the other support member (12) is connected to the other end of the rotor yoke (11) and the other end is connected to a second rotating shaft. The enclosure assembly includes two side plates (21) and two end plates (22). The two side plates (21) are respectively disposed on both sides of the superconducting magnet, and the two end plates (22) are disposed at both ends of the superconducting magnet. The upper part of one end plate (22) is connected to one end of the side plate (21), and the lower part is connected to one of the support members (12). The upper part of the other end plate (22) is connected to the other end of the side plate (21), and the lower part is connected to the other support member (12).

2. The superconducting magnet support structure according to claim 1, characterized in that, It also includes a filling component, which includes a thermal insulation filling layer (31) disposed between the superconducting magnet and the support component.

3. The superconducting magnet support structure according to claim 2, characterized in that, The filling assembly also includes a Dewar disposed between the bottom surface of the heat insulation filling layer (31) and the top surface of the support member (12). The Dewar includes an outer Dewar layer and an inner Dewar layer, and there is a vacuum between the outer Dewar layer and the inner Dewar layer. The outer Dewar layer is closer to the support member (12), and the inner Dewar layer is closer to the heat insulation filling layer (31).

4. The superconducting magnet support structure according to claim 1, characterized in that, The support assembly further includes a support connector (13) disposed on the rotor yoke (11), the support connector (13) having a threaded hole, and a fastener (14) passing through the superconducting magnet and threadedly connected to the threaded hole.

5. The superconducting magnet support structure according to claim 1, characterized in that, The support member (12) includes: a support portion (121) and a first connecting portion (122) and a second connecting portion (123) extending downward along both sides of the support portion (121); The upper end of the first connecting part (122) of one of the support members (12) is connected to one of the end plates (22), the lower end is connected to the first rotating shaft, and the second connecting part (123) is connected to one end of the rotor yoke (11); The upper end of the first connecting part (122) of the other support member (12) is connected to the other end plate (22), the lower end is connected to the second rotating shaft, and the second connecting part (123) is connected to the other end of the rotor yoke (11).

6. The superconducting magnet support structure according to claim 5, characterized in that, The first connecting part (122) is connected to the first rotating shaft and the second rotating shaft through a connector.

7. The superconducting magnet support structure according to claim 1, characterized in that, The end plate (22) has slots on both sides, and the end of the side plate (21) is inserted into the slot.

8. The superconducting magnet support structure according to claim 7, characterized in that, The slot has a protrusion (221) on the side wall facing the side plate (21), and the side plate (21) has a slot (211) on the side wall facing the protrusion (221), and the protrusion (221) engages with the slot (211).

9. The superconducting magnet support structure according to claim 2, characterized in that, The side plate (21) includes a side plate portion (212) and a cover plate portion (213) arranged at an angle, the angle being greater than or equal to 90°, and the side plate portion (212) being disposed on the heat insulation filling layer (31).

10. The superconducting magnet support structure according to any one of claims 1-9, characterized in that, The end plate (22) includes: a housing and a filler disposed within the housing.

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