Distributed high-temperature superconducting magnetic suspension damping device and distributed superconducting suspension unit body

Abstract

The invention relates to the technical field of high-temperature superconducting magnetic suspension, and discloses a distributed high-temperature superconducting magnetic suspension vibration damper and a distributed superconducting suspension unit. The device comprises a thermal stability sheath, an elastic element, a damping element, a connecting sheath, a connecting supporting 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 block, and the thermal stability sheath and the connecting sheath jointly serve as a friction pair; the damping element is arranged in the center of the thermal stabilization sheath, the elastic element is arranged on the thermal stabilization sheath in a mode of being concentric with the damping element, the connection supporting element is arranged on the upper portion of the connection sheath, and the module interface is arranged on the connection supporting element and used for providing a connection interface. Therefore, when the high-temperature superconducting block vibrates in a background magnetic field, the high-temperature superconducting block has the capabilities of buffering vibration and consuming energy, so that the vibration can be inhibited, and the defect that the electromagnetic force is under-damped is overcome.

Description

Technical Field

[0001] The invention relates to the technical field of high-temperature superconducting magnetic suspension, and in particular to a distributed high-temperature superconducting magnetic suspension vibration reduction device and a distributed superconducting suspension unit. Background Art

[0002] High-temperature superconducting magnetic levitation has broad application prospects in engineering fields such as maglev trains and all-superconducting flywheel energy storage due to its passive self-stabilizing characteristics. In maglev trains, high-temperature superconducting blocks are laid flat and fixed on the bottom of a cryogenic container, which is fixedly installed under the car body. Under the background magnetic field provided by the permanent magnetic track, the high-temperature superconducting blocks field-coldly capture magnetic flux. Due to its internal pinning effect, the car body is stably suspended above the track and provides lateral guiding force for the operation of the car body. In the all-superconducting flywheel energy storage system, high-temperature superconducting blocks are embedded in the flywheel shaft. Under the strong background magnetic field provided by the high-temperature superconducting coil, the superconducting blocks field-coldly capture magnetic flux and pinning effect to maintain radial stability. The induced current on the surface of the block interacts with the magnetic field to generate a suspension force, which supports the stable suspension of the shaft.

[0003] Due to the zero resistance effect of superconducting bulk materials, the current induced by the background magnetic field can run losslessly. The magnetic levitation effect produced by the mutual coupling of current and magnetic field is an underdamped system. The aforementioned magnetic levitation trains, all-superconducting flywheel energy storage and other magnetic levitation systems inevitably have vibration excitation factors such as uneven tracks, uneven or jumping magnetic fields, and changes in external loads. In high-speed linear or rotational motion, due to the underdamped characteristics, vibrations are difficult to suppress or decay quickly, which will lead to severe structural vibrations, affecting the dynamic operation stability of the equipment, and may even cause safety accidents due to vibration divergence.

[0004] At present, the main methods to improve the under-damped characteristics and vibration of high-temperature superconducting magnetic levitation and its dynamic operation performance are to improve the track smoothness, magnetic field uniformity, rely on structural damping, etc., and try to eliminate the excitation factors that cause vibration, and provide partial damping to consume energy to improve the vibration characteristics. The existing technology has the following main disadvantages:

[0005] 1) It is difficult to eliminate vibration factors and the cost is high

[0006] There are many factors that cause vibration in high-temperature superconducting maglev trains. It is not feasible to eliminate the source of the vibration factors, the effect is not obvious, and the cost is huge. For example, for high-temperature superconducting maglev trains, the permanent magnet tracks laid along the line can reach hundreds of kilometers. In order to improve the unevenness of the track and the uniformity of the magnetic field along the line, the installation process of the permanent magnet track is extremely demanding. It is necessary to ensure that the performance of each magnet is uniform, and the installation gap and installation flatness between blocks must be highly consistent. However, it is difficult to ensure that each permanent magnet has the same performance based on the permanent magnet manufacturing process alone. The ambient temperature along the line will affect the installation gap and installation flatness, and the excitation factors are difficult to eliminate.

[0007] 2) The structural damping is extremely small, and there is almost no vibration suppression effect

[0008] Because the structure can undergo elastic-plastic deformation, it can suppress the vibration propagation inside when it vibrates, thus having a certain vibration suppression effect. However, the magnetic levitation support structure must have sufficient strength and rigidity. When the magnetic levitation causes vibration due to electromagnetic coupling, it is generally difficult to cause elastic-plastic deformation of the structure, and the structural damping is extremely small. Therefore, relying on the structure's own damping cannot suppress the vibration of the magnetic levitation system. Summary of the invention

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

[0010] The present invention provides a distributed high-temperature superconducting magnetic levitation vibration reduction device, wherein the device comprises a thermally stable sheath, an elastic element, a damping element, a connecting sheath, a connecting support element and a module interface, wherein the thermally stable sheath, the elastic element and the damping element are arranged in the connecting sheath, the thermally stable sheath is arranged outside the high-temperature superconducting block material and serves as a friction pair together with the connecting sheath, the damping element is arranged at the center of the thermally stable sheath, the elastic element is arranged on the thermally stable sheath in a manner concentric 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 for providing a connecting interface.

[0011] Preferably, the material of the thermally stable sheath is a material with high thermal conductivity.

[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 thermally stable sheath and the outer surface of the high-temperature superconducting block are coated with low-temperature structural adhesive.

[0014] Preferably, the high temperature superconducting bulk material is packaged and fixed in the thermally stable sheath by welding.

[0015] Preferably, the elastic element 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.

[0016] Preferably, the thermally stable sheath and the damping element are made of non-magnetic stainless steel or composite materials.

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

[0018] The present invention also provides a distributed superconducting suspension unit body, which includes a cryogenic container and a plurality of the above-mentioned distributed high-temperature superconducting magnetic suspension vibration reduction devices, and the devices are installed in the cryogenic container through the module interface.

[0019] Preferably, a plurality of the devices are distributed in the cryogenic container in a flat manner or in a circular array.

[0020] Through the above technical solution, a single superconductor can be encapsulated in a high-temperature superconducting magnetic levitation vibration reduction device to obtain a small unit module with elasticity and damping. When the high-temperature superconducting block vibrates in the background magnetic field, it has the ability to buffer vibration and consume energy, thereby suppressing vibration and making up for the deficiency of electromagnetic force itself in under-damping. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The included drawings are used to provide a further understanding of the embodiments of the present invention, which constitute a part of the specification, are used to illustrate the embodiments of the present invention, and together with the text description, explain the principles of the present invention. Obviously, the drawings in the following description are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

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

[0023] Figure 2 A schematic diagram showing a distributed high-temperature superconducting magnetic suspension vibration reduction device according to an embodiment of the present invention is distributed in a flat manner;

[0024] Figure 3 A schematic diagram showing a distributed high-temperature superconducting magnetic levitation vibration reduction device according to an embodiment of the present invention distributed in a circular array. DETAILED DESCRIPTION

[0025] It should be noted that, in the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0027] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0028] Figure 1 A schematic diagram of a distributed high-temperature superconducting magnetic suspension vibration reduction device according to an embodiment of the present invention is shown.

[0029] like Figure 1 As shown, an embodiment of the present invention provides a distributed high-temperature superconducting magnetic levitation vibration reduction device, wherein the device includes a thermally stable sheath 2, an elastic element 3, a damping element 4, a connecting sheath 5, a connecting support element 6 and a module interface 7, wherein the thermally stable sheath 2, the elastic element 3 and the damping element 4 are arranged in the connecting sheath 5, the thermally stable sheath 2 is arranged outside the high-temperature superconducting block 1 and serves as a friction pair together with the connecting sheath 5, the damping element 4 is arranged at the center of the thermally stable sheath 2, the elastic element 3 is arranged on the thermally stable sheath 2 in a concentric manner with the damping element 4, the connecting support element 6 is arranged on the upper part of the connecting sheath 5, and the module interface 7 is arranged on the connecting support element 6 for providing a connecting interface.

[0030] The heat-stable sheath 2 and the connecting sheath 5 form a friction pair, which consumes energy through friction resistance during the vibration process, causing the vibration to decay rapidly.

[0031] Through the above technical solution, a single superconductor can be encapsulated in a high-temperature superconducting magnetic levitation vibration reduction device to obtain a small unit module with elastic buffering and damping energy dissipation. When the high-temperature superconducting block vibrates in the background magnetic field, it has the ability to buffer vibration and consume energy, thereby suppressing vibration and making up for the deficiency of electromagnetic force itself in under-damping.

[0032] Specifically, in the event of vibration disturbance (such as uneven track, uneven or jumping magnetic field, external load changes, etc. that cause system vibration), the thermally stable sheath 2 moves up and down with the high-temperature superconducting block 1, the elastic element 3 provides a buffering force during the up and down vibration of the high-temperature superconducting block 1, and the damping element 4 consumes vibration energy during the up and down vibration of the high-temperature superconducting block 1, thereby achieving a vibration improvement effect from the source.

[0033] According to one embodiment of the present invention, the high temperature superconducting block material may be cylindrical, rectangular or other customized shapes. The high temperature superconducting block material may be a high temperature superconducting block formed by stacking high temperature superconducting tapes, or a high temperature superconducting coil wound by high temperature superconducting tapes.

[0034] According to an embodiment of the present invention, the material of the thermally stable sheath 2 is a material with high thermal conductivity.

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

[0036] By using the above materials, the mechanical strength of the superconducting bulk material can be increased while the thermal stability of the superconductor can be improved.

[0037] Those skilled in the art should understand that the description of the above materials is merely exemplary and is not intended to limit the present invention, and other high-strength, wear-resistant, and high-thermal conductivity materials may also be applied to the present invention.

[0038] According to an embodiment of the present invention, the inner surface of the thermally stable sheath 2 and the outer surface of the high-temperature superconducting block 1 are coated with low-temperature structural adhesive.

[0039] For example, the low temperature structural adhesive is stykast2850.

[0040] The thermally stable sheath can be firmly bonded to the surface of the superconducting block by using low-temperature structural adhesive.

[0041] Alternatively, the high-temperature superconducting bulk material 1 is encapsulated and fixed in the thermally stable sheath 2 by welding.

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

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

[0044] According to an embodiment of the present invention, the thermally stable sheath 2 and the damping element 4 are made of non-magnetic stainless steel or composite materials.

[0045] In addition, the connecting sleeve can also be made of non-magnetic stainless steel or composite materials. The matching surface of the connecting sleeve and the thermally stable sleeve can control the friction damping dissipation ratio through roughness design to achieve a balance between friction energy consumption and temperature rise control.

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

[0047] Thereby, the contact area between the superconducting block and the low-temperature refrigeration medium can be increased, thereby improving the cooling effect of the superconductor.

[0048] According to an embodiment of the present invention, the connection support element 6 can be fixed to the connection sheath 5 and the module interface 7 by welding.

[0049] An embodiment of the present invention further provides a distributed superconducting suspension unit body, which includes a cryogenic container and a plurality of the above-mentioned distributed high-temperature superconducting magnetic suspension vibration reduction devices, and the devices are installed in the cryogenic container through the module interface 7.

[0050] That is, by installing a plurality of distributed high-temperature superconducting magnetic suspension vibration reduction devices with high-temperature superconducting blocks inside in a low-temperature container, a distributed superconducting suspension unit body can be obtained.

[0051] Among them, the distributed superconducting suspension unit is field-cooled in the background magnetic field provided by a permanent magnet or a superconducting coil, and the induced current on the surface of the superconducting block interacts with the magnetic field to generate a suspension support force, and the suspension is stabilized by the superconducting pinning effect.

[0052] For example, bolt holes can be set on the module interface, and a single small module unit can be firmly installed on the bottom of the low-temperature container by bolts, while facilitating the adjustment of the arrangement gap.

[0053] According to one embodiment of the present invention, a plurality of the devices are laid flat in the cryogenic container (eg Figure 2 as shown) or in a circular array (as Figure 3 shown).

[0054] Those skilled in the art should understand that the above Figure 3 The circular array distribution shown is merely exemplary and is not intended to limit the present invention.

[0055] It can be seen from the above embodiments that the distributed high-temperature superconducting magnetic suspension vibration reduction device described in the present invention has at least the following advantages compared with the prior art:

[0056] 1) By packaging superconducting blocks with springs and damping to form a small module unit, a single superconducting block has the ability to buffer vibration and dissipate energy, making up for the lack of damping of the superconducting magnetic levitation itself, thereby improving its vibration characteristics;

[0057] 2) The small unit modules are distributedly installed in the cryogenic 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 vibration reduction device of the present invention solves the problem from the perspective of the superconducting body. The amount of superconductors used in the magnetic suspension system is controllable and is not affected by the ambient temperature. Compared with improving track unevenness, single permanent magnet performance consistency, and track installation accuracy, it has strong feasibility, obvious effects, and low costs;

[0059] 4) The elastic support stiffness and damping ratio of a single module can be customized to adapt to disturbances of different background magnetic fields, with strong adaptability and large expansion space;

[0060] 5) The vibration reduction device described in the present invention has a simple and compact structure and is flexible and convenient to install.

[0061] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0062] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0063] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0064] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A distributed high-temperature superconducting magnetic suspension vibration reduction device, characterized in that: The device comprises a thermally stable 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 thermally stable sheath (2), the elastic element (3) and the damping element (4) are arranged in the connecting sheath (5); the thermally stable sheath (2) is arranged outside the high-temperature superconducting block (1) and serves as a friction pair together with the connecting sheath (5); the damping element (4) is arranged at the center of the thermally stable sheath (2); the elastic element (3) is arranged on the thermally stable sheath (2) in a concentric manner with the damping element (4); the connecting support element (6) is arranged on the upper part of the connecting sheath (5); and the module interface (7) is arranged on the connecting support element (6) to provide a connecting interface.

2. The device according to claim 1, characterized in that The material of the heat-stable sheath (2) is a material with high thermal conductivity.

3. The device according to claim 2, characterized in that The high thermal conductivity material is aluminum alloy, copper alloy or composite material.

4. The device according to claim 1, characterized in that The inner surface of the thermally stable sheath (2) and the outer surface of the high-temperature superconducting block (1) are coated with low-temperature structural adhesive.

5. The device according to claim 1, characterized in that The high-temperature superconducting bulk material (1) is encapsulated and fixed in the thermally stable sheath (2) by welding.

6. The device according to any one of claims 1 to 5, 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.

7. The device according to any one of claims 1 to 5, characterized in that The thermally stable sheath (2) and the damping element (4) are made of non-magnetic stainless steel or composite materials.

8. The device according to any one of claims 1 to 5, characterized in that The heat-stable sheath (2) and the connecting sheath (5) are both provided with heat dissipation holes.

9. A distributed superconducting suspension unit, characterized in that: It comprises a cryogenic container and a plurality of distributed high-temperature superconducting magnetic suspension vibration reduction devices according to any one of claims 1 to 8, wherein the devices are installed in the cryogenic container through the module interface (7).

10. The distributed superconducting suspension unit according to claim 9, characterized in that: A plurality of the devices are distributed in the low-temperature container in a flat manner or in a circular array manner.

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