Distributed high-temperature superconducting magnetic levitation damping device and distributed superconducting levitation unit

Abstract

The application relates to the technical field of high-temperature superconducting magnetic suspension, and discloses a distributed high-temperature superconducting magnetic suspension damping device and a distributed superconducting suspension unit body. The device comprises a thermal stability sheath, an elastic element, a damping element, a connecting sheath, a connecting support element and a module interface. The thermal stability sheath, the elastic element and the damping element are arranged in the connecting sheath, the thermal stability sheath is arranged outside a high-temperature superconducting bulk material and serves as a friction pair together with the connecting sheath, the damping element is arranged at a central position of the thermal stability sheath, the elastic element is arranged on the thermal stability sheath in a concentric mode with the damping element, the connecting support element is arranged on the upper portion of the connecting sheath, and the module interface is arranged on the connecting support element and used for providing a connecting interface. Therefore, when the high-temperature superconducting bulk material vibrates in a background magnetic field, the high-temperature superconducting bulk material has the ability of buffering vibration and consuming energy, so that the vibration can be inhibited, and the deficiency of the electromagnetic force in terms of insufficient damping can be made up.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of high-temperature superconducting magnetic levitation technology, and particularly relates to a distributed high-temperature superconducting magnetic levitation damping device and a distributed superconducting levitation unit. BACKGROUND

[0002] High-temperature superconducting magnetic levitation has broad application prospects in the fields of magnetic levitation trains and all-superconducting flywheel energy storage due to its passive stability. In a magnetic levitation train, high-temperature superconducting bulk materials are laid and fixed on the bottom of a low-temperature container, which is fixedly installed below the vehicle body. Under the background magnetic field provided by the permanent magnet track, the high-temperature superconducting bulk materials field-cool capture magnetic flux, and the vehicle body is stably levitated above the track due to the internal pinning effect, and provides lateral guiding force for the vehicle body. In an all-superconducting flywheel energy storage system, high-temperature superconducting bulk materials are embedded in the flywheel shaft, and under the strong background magnetic field provided by the high-temperature superconducting coil, the superconducting bulk materials field-cool capture magnetic flux and the pinning effect maintain the radial stability. The current induced on the surface of the bulk material interacts with the magnetic field to generate a levitation force, which supports the stable suspension of the shaft.

[0003] Due to the zero-resistance effect of superconducting bulk materials, the current induced on the superconducting bulk materials in the background magnetic field can be losslessly operated, and the magnetic levitation effect caused by the mutual coupling of the current and the magnetic field is an under-damped system. In the foregoing magnetic levitation train, all-superconducting flywheel energy storage and other magnetic levitation systems, there are inevitably vibration excitation factors such as track irregularity, non-uniform or jumping of the magnetic field, and changes in external load. Due to the under-damped characteristic, the vibration is difficult to suppress or quickly attenuate, which will cause the structure to vibrate violently, affect the dynamic operation stability of the equipment, and even cause safety accidents due to vibration divergence.

[0004] At present, in order to improve the under-damped characteristic of high-temperature superconducting magnetic levitation and vibration and improve its dynamic operation performance, the track smoothness, magnetic field uniformity and structural damping are mainly improved to eliminate the excitation factors causing vibration as much as possible and provide partial damping to consume energy. The existing technology mainly has the following disadvantages:

[0005] 1) Difficulty in eliminating vibration factors, high cost

[0006] There are many factors causing high-temperature superconducting magnetic levitation vibration, and it is difficult to start from the source of eliminating the excitation factors causing vibration, the effect is not obvious, and the cost is huge. For example, in a high-temperature superconducting magnetic levitation train, the permanent magnet track laid along the line can be up to hundreds of kilometers. In order to improve the track irregularity and the uniformity of the magnetic field along the line, the installation process of the permanent magnet track is extremely harsh. It is necessary to ensure that each magnet has uniform performance, and the installation gap and installation flatness between the magnets must be kept highly consistent. However, it is difficult to ensure that each permanent magnet has the same performance from the manufacturing process of the permanent magnet, and the environmental temperature along the line will affect the installation gap and installation flatness, so it is difficult to eliminate the excitation factors.

[0007] 2) structure damping is minimal, almost no vibration suppression effect

[0008] The structure can suppress the vibration propagation in the interior when it vibrates itself due to its elastic-plastic deformation, and further has a certain vibration suppression effect. However, the magnetic levitation support structure must have sufficient strength and rigidity, and it is generally difficult to cause elastic-plastic deformation of the structure when the magnetic levitation causes vibration due to electromagnetic coupling, and the structure damping is minimal, so the vibration of the magnetic levitation system cannot be suppressed by relying on the damping of the structure itself. SUMMARY

[0009] The application provides a distributed high-temperature superconducting magnetic levitation vibration damping device and a distributed superconducting levitation unit body, which can solve the technical problems in the prior art.

[0010] The application provides a distributed high-temperature superconducting magnetic levitation vibration damping device, wherein the device comprises a thermal stability sheath, an elastic element, a damping element, a connecting sheath, a connecting support element and a module interface, the thermal stability sheath, the elastic element and the damping element are arranged in the connecting sheath, the thermal stability sheath is arranged outside the high-temperature superconducting bulk material and serves as a friction pair together with the connecting sheath, the damping element is arranged at the center position of the thermal stability sheath, the elastic element is arranged on the thermal stability sheath in a concentric manner with the damping element, the connecting support element is arranged on the upper part of the connecting sheath, and the module interface is arranged on the connecting support element and used for providing a connecting interface.

[0011] Preferably, the material of the thermal stability sheath is a high-thermal-conductivity material.

[0012] Preferably, the high-thermal-conductivity material is an aluminum alloy, a copper alloy or a composite material.

[0013] Preferably, the inner surface of the thermal stability sheath and the outer surface of the high-temperature superconducting bulk material are coated with a low-temperature structural adhesive.

[0014] Preferably, the high-temperature superconducting bulk material is fixedly packaged in the thermal stability sheath in a welding manner.

[0015] Preferably, the elastic element is a non-magnetic stainless steel butterfly spring, a non-magnetic stainless steel cylindrical spiral spring, a rubber spring or an elastic composite material spring.

[0016] Preferably, the thermal stability sheath and the damping element are made of non-magnetic stainless steel or a composite material.

[0017] Preferably, the thermal stability sheath and the connecting sheath are both provided with heat dissipation holes.

[0018] The application further provides a distributed superconducting suspension unit, comprising a low-temperature container and a plurality of the distributed high-temperature superconducting magnetic suspension damping devices.

[0019] Preferably, the plurality of the devices are distributed in a tiled manner or a circular array manner in the low-temperature container.

[0020] By the above technical solution, a single superconductor can be packaged in the high-temperature superconducting magnetic suspension damping device to obtain a small unit module with elasticity and damping. When the high-temperature superconducting bulk material vibrates in a background magnetic field, it has the ability to buffer vibration and consume energy, thereby inhibiting vibration and making up for the lack of damping of the electromagnetic force itself. BRIEF DESCRIPTION OF DRAWINGS

[0021] The accompanying drawings, which are included to provide a further understanding of the embodiments of the application and constitute a part of this specification, illustrate embodiments of the application and together with the description help to explain the principles of the application. Obviously, the drawings described below are only some of the embodiments of the application, and other drawings can be obtained by those of ordinary skill in the art without creative labor based on these drawings.

[0022] Figure 1 A schematic diagram of a distributed high-temperature superconducting magnetic suspension damping device according to an embodiment of the application is shown;

[0023] Figure 2 A schematic diagram of a distributed high-temperature superconducting magnetic suspension damping device according to an embodiment of the application is shown in a tiled manner;

[0024] Figure 3 A schematic diagram of a distributed high-temperature superconducting magnetic suspension damping device according to an embodiment of the application is shown in a circular array manner. DETAILED DESCRIPTION

[0025] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings of the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all. The description of the at least one exemplary embodiment is actually only illustrative, but not as any limitation on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor are within the scope of protection of the present application.

[0026] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, components, and / or groups thereof, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0027] The relative arrangement of parts and steps, numerical expressions, and numerical values set forth in the examples are not intended to limit the scope of the application unless otherwise specifically stated. It is to be understood that the actual dimensions of the various parts shown in the drawings are not necessarily to scale as the dimensions are shown for ease of discussion. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art can not be discussed in detail, but should be considered as if the discussion were fully set forth herein. In the examples shown and discussed herein, any specific values are to be interpreted as illustrative only and not as a limitation. Thus, other examples of example embodiments can have different values. It is noted that like numbers and letters on the figures identify like parts throughout the several views, and thus, further discussion of the same will not be repeated.

[0028] Figure 1 A schematic diagram of a distributed HTS maglev vibration damping device according to an embodiment of the present application is shown.

[0029] As Figure 1 shown, an embodiment of the present application provides a distributed HTS maglev vibration damping device, wherein the device comprises a thermal stabilization sheath 2, an elastic element 3, a damping element 4, a connecting sheath 5, a connecting support element 6, and a module interface 7, the thermal stabilization sheath 2, the elastic element 3, and the damping element 4 are disposed within the connecting sheath 5, the thermal stabilization sheath 2 is disposed outside the HTS bulk 1 and serves as a friction pair together with the connecting sheath 5, the damping element 4 is disposed at the center of the thermal stabilization sheath 2, the elastic element 3 is disposed on the thermal stabilization sheath 2 in a concentric manner with the damping element 4, the connecting support element 6 is disposed on the upper part of the connecting sheath 5, and the module interface 7 is disposed on the connecting support element 6 to provide a connecting interface.

[0030] The thermal stabilization sheath 2 and the connecting sheath 5 form a friction pair, which consumes energy through frictional resistance during vibration to quickly attenuate the vibration.

[0031] By the technical scheme, the single superconductor can be packaged in the high-temperature superconducting magnetic suspension damping device to obtain a small unit module with elastic buffering and damping energy consumption. When the high-temperature superconducting bulk material vibrates in the background magnetic field, the high-temperature superconducting bulk material has the ability to buffer vibration and consume energy, so that the vibration can be inhibited, and the insufficient damping of the electromagnetic force can be compensated.

[0032] Specifically, in the case of vibration excitation (such as track irregularity, magnetic field unevenness or jumping, external load change, etc. causing system vibration), the thermal stability sheath 2 moves up and down with the high-temperature superconducting bulk material 1, the elastic element 3 provides a buffering force during the up and down vibration of the high-temperature superconducting bulk material 1, and the damping element 4 consumes vibration energy during the up and down vibration of the high-temperature superconducting bulk material 1, thereby achieving vibration improvement effect from the source.

[0033] According to an embodiment of the present application, the high-temperature superconducting bulk material can be cylindrical, rectangular or other customized shape. The high-temperature superconducting bulk material can be a high-temperature superconducting block formed by stacking high-temperature superconducting tapes, or a high-temperature superconducting coil formed by winding high-temperature superconducting tapes.

[0034] According to an embodiment of the present application, the material of the thermal stability sheath 2 is a high-thermal-conductivity material.

[0035] According to an embodiment of the present application, the high-thermal-conductivity material is an aluminum alloy, a copper alloy or a composite material (for example, carbon fiber).

[0036] The use of the above-mentioned material can increase the mechanical strength of the superconducting bulk material while improving the thermal stability of the superconductor.

[0037] Those skilled in the art should understand that the description of the above-mentioned material is only exemplary and is not intended to limit the present application. Other high-strength, wear-resistant, high-thermal-conductivity materials can also be applied to the present application.

[0038] According to an embodiment of the present application, the inner surface of the thermal stability sheath 2 and the outer surface of the high-temperature superconducting bulk material 1 are coated with a low-temperature structural adhesive.

[0039] For example, the low-temperature structural adhesive is stykast 2850.

[0040] The use of the low-temperature structural adhesive can firmly bond the thermal stability sheath to the surface of the superconducting bulk material.

[0041] Alternatively, the high-temperature superconducting bulk material 1 is packaged and fixed in the thermal stability sheath 2 by welding.

[0042] According to an embodiment of the present application, the elastic element 3 is a non-magnetic stainless steel butterfly spring, a non-magnetic stainless steel cylindrical spiral spring, a rubber spring (for example, a low-temperature resistant rubber spring) or an elastic composite material spring.

[0043] According to an embodiment of the present application, the damping element can adopt small-hole throttling damping or low-temperature-resistant hydraulic damping.

[0044] According to an embodiment of the present application, the thermal stability sheath 2 and the damping element 4 adopt non-magnetic stainless steel or composite material.

[0045] In addition, the connecting sheath can also be made of non-magnetic stainless steel or composite material, and the mating surface of the connecting sheath and the thermal stability sheath can control the friction damping dissipation ratio through roughness design, so as to achieve the balance effect of friction energy dissipation and temperature rise control.

[0046] According to an embodiment of the present application, the thermal stability sheath 2 and the connecting sheath 5 are both provided with heat dissipation holes.

[0047] In this way, the contact area of the superconducting bulk material and the low-temperature refrigeration medium can be increased, and the cooling effect of the superconductor can be improved.

[0048] According to an embodiment of the present application, the connecting support element 6 can be fixed with the connecting sheath 5 and the module interface 7 through welding.

[0049] The embodiment of the present application also provides a distributed superconducting suspension unit body, which comprises a low-temperature container and a plurality of the above-mentioned distributed high-temperature superconducting magnetic suspension damping devices, and the devices are installed in the low-temperature container through the module interface 7.

[0050] That is, by installing a plurality of distributed high-temperature superconducting magnetic suspension damping devices provided with high-temperature superconducting bulk materials inside the low-temperature container, a distributed superconducting suspension unit body can be obtained.

[0051] The distributed superconducting suspension unit body is field-cooled in a background magnetic field provided by a permanent magnet or a superconducting coil, the surface of the superconducting bulk material induces current which interacts with the magnetic field to generate suspension support force, and the superconducting pinning effect is used to stabilize the suspension.

[0052] For example, bolt holes can be arranged on the module interface, and a single small module unit is firmly installed at the bottom of the low-temperature container through bolts, and meanwhile, the arrangement gap can be conveniently adjusted.

[0053] According to an embodiment of the present application, the plurality of devices are distributed in a tiled manner (as shown in Figure 2 ) or a circular array manner (as shown in Figure 3 ).

[0054] Those skilled in the art should understand that the circular array manner distribution shown in Figure 3 is only exemplary, and is not used to limit the present application.

[0055] From the above embodiments, the distributed high-temperature superconducting magnetic levitation damping device has at least the following advantages compared with the prior art:

[0056] 1) By encapsulating the superconducting bulk material, spring and damping to form a small module unit, the single superconducting bulk material has the ability of vibration buffering and energy dissipation, which makes up for the lack of under-damping of superconducting magnetic levitation, and further improves the vibration characteristics;

[0057] 2) The small unit module is distributedly installed in the low-temperature container, which can finely suppress the fluctuation of the suspension force, thereby reducing the total suspension force fluctuation of the superconducting suspension unit and improving the stability and comfort of the suspension system;

[0058] 3) The damping device starts from the superconducting body, and the number of superconductors used in the magnetic levitation system is controllable and is not affected by the environment temperature. Compared with improving the track irregularity, the performance consistency of the single permanent magnet, and the installation precision of the track, the damping device has strong feasibility, obvious effect and low cost;

[0059] 4) The damping device can be designed by customizing the elastic support stiffness and damping ratio of the single module, thereby adapting to the disturbance of different background magnetic fields, having strong adaptability and large expansion space;

[0060] 5) The damping device has simple and compact structure, and is flexible and convenient to install.

[0061] In the description of the present application, it should be understood that the orientation words such as "front, rear, upper, lower, left, right", "transverse, vertical, perpendicular, horizontal" and "top, bottom" and the like indicate the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, without making the opposite statement, these orientation words do not indicate and imply that the indicated device or element must have a specific orientation or be constructed and operated in a specific orientation, therefore it cannot be understood as a limitation on the protection scope of the present application; the orientation words "inner, outer" refer to the inner and outer of the contour of each component.

[0062] For purposes of the description hereinafter, spatial or directional terms, for example, "above", "below", "upper", "lower", and the like, can be used, and relate to the device as illustrated in the figures. However, it is to be understood that no absolute or relative orientation of the device is intended or implied, unless specifically described as such. Terms concerning attachments, coupling and the like, such as "connected" and "coupled" and the like, are to be construed in accordance with their normal meanings, that is, as referring to an indirect or direct connection or coupling. Any reference to "comprising" or "containing" is to be construed as meaning "comprising or containing, but not limited to". Any reference to "comprising" or "containing" is to be construed as meaning "comprising or containing, but not limited to".

[0063] In addition, it should be pointed out that the use of the terms "first", "second" and the like, to describe various elements in the claims, is merely intended to distinguish between two steps or entities of the application, and is not intended to limit the scope of the present application, unless specifically stated otherwise. Thus, the terms "first", "second", and the like, are not intended to limit the scope of the present application, unless specifically stated otherwise.

[0064] The preferred embodiments of the application are described above in detail. The application is not limited to the embodiments described above, but can be modified and changed by any person skilled in the art without departing from the spirit and principles of the application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the application shall be included in the scope of the protection of the application.

Claims

1. A distributed high-temperature superconducting magnetic levitation vibration reduction device, characterized in that: The device comprises a thermally stable jacket (2), an elastic element (3), a damping element (4), a connecting jacket (5), a connecting support element (6) and a module interface (7); the thermally stable jacket (2), the elastic element (3) and the damping element (4) are arranged in the connecting jacket (5); the thermally stable jacket (2) is arranged outside the high-temperature superconducting block (1) and serves as a friction pair together with the connecting jacket (5); the damping element (4) is arranged at the center of the thermally stable jacket (2); the elastic element (3) is arranged on the thermally stable jacket (2) in a manner concentric with the damping element (4); the connecting support element (6) is arranged on the upper part of the connecting jacket (5); the module interface (7) is arranged on the connecting support element (6) for providing a connecting interface; the material of the thermally stable jacket (2) is aluminum alloy, copper alloy or composite material; the high-temperature superconducting block (1) is encapsulated and fixed in the thermally stable jacket (2) by welding.

2. The device according to claim 1, characterized in that The elastic element (3) is a non-magnetic stainless steel butterfly spring, a non-magnetic stainless steel cylindrical helical spring, a rubber spring or an elastic composite material spring.

3. The device according to claim 1, characterized in that The thermally stable sheath (2) and the damping element (4) are made of non-magnetic stainless steel or composite materials.

4. The device according to claim 1, characterized in that The heat-stable sheath (2) and the connecting sheath (5) are both provided with heat dissipation holes.

5. A distributed superconducting suspension unit, characterized in that: It comprises a cryogenic container and a plurality of distributed high-temperature superconducting magnetic levitation vibration reduction devices according to any one of claims 1 to 4, wherein the devices are installed in the cryogenic container through the module interface (7).

6. The distributed superconducting suspension unit according to claim 5, characterized in that: A plurality of the devices are distributed in a flat manner within the low-temperature container.

7. The distributed superconducting suspension unit according to claim 5, characterized in that: A plurality of the devices are distributed in a circular array within the cryogenic container.

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