Temperature deformation compensation support device and superconducting magnet

Abstract

The invention relates to the technical field of force transmission structures in a cryogenic environment and discloses a temperature deformation compensation support device and a superconducting magnet. Among them, the device includes a cold end joint, a back plate hot end joint, a top plate hot end joint, a side plate hot end joint, a back plate spherical hinge rod, a side plate spherical hinge rod and a top plate spherical hinge rod. The cold end joint is connected to the outer wall of the inner dewar, the back plate hot end joint is connected to the back plate of the outer dewar, the top plate hot end joint is connected to the top plate of the outer dewar, the side plate hot end joint is connected to the side plate of the outer dewar, the ball at one end of the back plate spherical hinge rod is embedded in the first spherical groove of the cold end joint, and the ball at the other end is embedded in the spherical groove of the back plate hot end joint, the ball at one end of the side plate spherical hinge rod is embedded in the second spherical groove of the cold end joint, and the ball at the other end is embedded in the spherical groove of the side plate hot end joint, the ball at one end of the top plate spherical hinge rod is embedded in the third spherical groove of the cold end joint, and the ball at the other end is embedded in the spherical groove of the top plate hot end joint.

Description

Technical Field

[0001] The invention relates to the technical field of force transmission structures in a cryogenic environment, and in particular to a temperature deformation compensation support device and a superconducting magnet. Background Art

[0002] Superconducting magnet technology mainly utilizes the zero resistance characteristics of superconducting wire in a deep cold (ultra-low temperature) environment and the principle of generating a closed-loop stable magnetic field after power is applied. Superconducting coils can be converted to a superconducting state near the liquid helium temperature zone (4.2K), while the superconducting maglev train system operates at room temperature (300K). Superconducting coils are usually loaded in a double-layer Dewar structure with a vacuum layer, and the temperature difference between the inner and outer Dewars is extremely large. In addition, the superconducting magnets carried by superconducting maglev trains are in a dynamic environment. Unlike traditional static superconducting magnets, the load environment is complex and harsh. Effectively using the adiabatic support structure to transfer the electromagnetic force generated by the superconducting coils in a deep cold environment to the vehicle body structure at room temperature has become one of the key technologies of superconducting maglev trains.

[0003] At present, the research on thermal insulation support structure mainly includes the low-temperature, lightweight and low thermal conductivity composite thermal insulation structure developed by China Academy of Launch Vehicle Technology, which is mainly used for thermal insulation of aircraft cryogenic tanks. Its rigidity is not high and its bearing capacity is poor. The Chinese Academy of Sciences designed a multi-layer epoxy cylindrical support device for the "steady-state strong magnetic field experimental device", which comprehensively considered the thermal insulation design and structural rigidity design. However, due to its cylindrical main structure, its axial mechanical properties are good, but the radial properties are poor, and it is difficult to withstand complex loads in the shear direction. Summary of the invention

[0004] The invention provides a temperature deformation compensation support device and a superconducting magnet, which can solve the technical problems in the prior art.

[0005] The present invention provides a temperature deformation compensation support device, wherein the device comprises a cold end joint, a back plate hot end joint, a top plate hot end joint, a side plate hot end joint, a back plate spherical hinge connecting rod, a side plate spherical hinge connecting rod and a top plate spherical hinge connecting rod, the cold end joint is provided with a first spherical groove, a second spherical groove and a third spherical groove, the back plate hot end joint, the top plate hot end joint and the side plate hot end joint are respectively provided with spherical grooves, the cold end joint is connected to the outer wall of the inner Dewar, the back plate hot end joint is connected to the back plate of the outer Dewar, the top plate hot end joint is connected to the The top plate of the outer dewar is connected, the hot end joint of the side plate is connected to the side plate of the outer dewar, the ball at one end of the back plate spherical hinge rod is embedded in the first spherical groove of the cold end joint, and the ball at the other end is embedded in the spherical groove of the hot end joint of the back plate, the ball at one end of the side plate spherical hinge rod is embedded in the second spherical groove of the cold end joint, and the ball at the other end is embedded in the spherical groove of the hot end joint of the side plate, the ball at one end of the top plate spherical hinge rod is embedded in the third spherical groove of the cold end joint, and the ball at the other end is embedded in the spherical groove of the hot end joint of the top plate.

[0006] Preferably, the cold end joint, the back plate hot end joint, the top plate hot end joint and the side plate hot end joint are made of stainless steel.

[0007] Preferably, the back plate spherical hinge rod, the side plate spherical hinge rod and the top plate spherical hinge rod are composite material structures.

[0008] Preferably, the composite material structure comprises an epoxy resin matrix and a glass fiber reinforcement.

[0009] Preferably, the cold end joint is connected to the outer wall of the inner Dewar by welding, the back plate hot end joint is connected to the back plate of the outer Dewar by welding, the top plate hot end joint is connected to the top plate of the outer Dewar by welding, and the side plate hot end joint is connected to the side plate of the outer Dewar by welding.

[0010] The present invention also provides a superconducting magnet, wherein the superconducting magnet comprises the above-mentioned temperature deformation compensation support device.

[0011] Through the above technical solution, the inner dewar is connected to the outer dewar top plate, back plate and side plate respectively through the spherical hinge connecting rods, and the three-way load can be borne by the axial force of the three-way spherical hinge connecting rods in the corresponding directions; and the parts where the spherical hinge connecting rods are connected to the inner dewar and the outer dewar all form a ball hinge structure through a spherical groove, and a single connecting rod only limits the translational freedom of the inner and outer dewars along the connecting rod direction, but does not limit the rotational freedom centered on the spherical head. Therefore, the spherical hinge connecting rod itself is a two-force rod and is not subject to shear force. Therefore, the present invention can compensate for the temperature deformation caused by the contraction of the cold end (inner dewar) while transmitting electromagnetic and mechanical loads in all directions, and avoid the support member from being subjected to excessive shear force due to being fixed to the inner dewar. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] 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.

[0013] Figure 1 A schematic structural diagram of a temperature deformation compensation support device according to an embodiment of the present invention is shown;

[0014] Figure 2 A schematic plan view showing a temperature deformation compensation support device according to an embodiment of the present invention after being connected to inner and outer Dewars of inner and outer cryogenic containers;

[0015] Figure 3 A three-dimensional schematic diagram of a temperature deformation compensation support device according to an embodiment of the present invention after being connected to inner and outer Dewars of inner and outer low-temperature containers is shown.

[0016] Description of Reference Numerals

[0017] 1 Cold end connector; 2 Back plate hot end connector; 3 Top plate hot end connector;

[0018] 4 Side panel hot end joint; 5 Back panel spherical hinge connecting rod; 6 Side panel spherical hinge connecting rod;

[0019] 7 top plate spherical hinge connecting rod 8 outer dewar; 9 inner dewar. DETAILED DESCRIPTION

[0020] 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.

[0021] 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.

[0022] 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.

[0023] Figure 1 A schematic structural diagram of a temperature deformation compensation support device according to an embodiment of the present invention is shown.

[0024] Figure 2 A schematic plan view of a temperature deformation compensation support device according to an embodiment of the present invention after being connected to inner and outer Dewars of inner and outer cryogenic containers is shown.

[0025] Figure 3 A three-dimensional schematic diagram of a temperature deformation compensation support device according to an embodiment of the present invention after being connected to inner and outer Dewars of inner and outer low-temperature containers is shown.

[0026] like Figure 1-3As shown, an embodiment of the present invention provides a temperature deformation compensation support device, wherein the device includes a cold end joint 1, a back plate hot end joint 2, a top plate hot end joint 3, a side plate hot end joint 4, a back plate spherical hinge connecting rod 5, a side plate spherical hinge connecting rod 6 and a top plate spherical hinge connecting rod 7, the cold end joint 1 is provided with a first spherical groove, a second spherical groove and a third spherical groove, the back plate hot end joint 2, the top plate hot end joint 3 and the side plate hot end joint 4 are respectively provided with spherical grooves, the cold end joint (side) 1 is connected to the outer wall of the inner Dewar 9, the back plate hot end joint 2 is connected to the back plate of the outer Dewar 8, and the top plate hot end joint 4 is connected to the back plate of the outer Dewar 8. The end joint 3 is connected to the top plate of the outer dewar 8, the side panel hot end joint 4 is connected to the side plate of the outer dewar 8, the ball at one end of the back panel spherical hinge rod 5 is embedded in the first spherical groove of the cold end joint 1, and the ball at the other end is embedded in the spherical groove of the back panel hot end joint 2, the ball at one end of the side panel spherical hinge rod 6 is embedded in the second spherical groove of the cold end joint 1, and the ball at the other end is embedded in the spherical groove of the side panel hot end joint 4, the ball at one end of the top panel spherical hinge rod 7 is embedded in the third spherical groove of the cold end joint 1, and the ball at the other end is embedded in the spherical groove of the top panel hot end joint 3.

[0027] That is, the spheres at both ends of each spherical hinge rod cooperate with the spherical grooves in the cold end joint and the hot end joint to form a spherical hinge structure, and the spherical hinge rod only bears axial force.

[0028] The supporting device of the present invention can be applied to temperature deformation compensation of low-temperature containers.

[0029] Through the above technical solution, the inner dewar is connected to the outer dewar top plate, back plate and side plate respectively through the spherical hinge connecting rods, and the three-way load can be borne by the axial force of the three-way spherical hinge connecting rods in the corresponding directions; and the parts where the spherical hinge connecting rods are connected to the inner dewar and the outer dewar all form a ball hinge structure through a spherical groove, and a single connecting rod only limits the translational freedom of the inner and outer dewars along the connecting rod direction, but does not limit the rotational freedom centered on the spherical head. Therefore, the spherical hinge connecting rod itself is a two-force rod and is not subject to shear force. Therefore, the present invention can compensate for the temperature deformation caused by the contraction of the cold end (inner dewar) while transmitting electromagnetic and mechanical loads in all directions, and avoid the support member from being subjected to excessive shear force due to being fixed to the inner dewar.

[0030] According to one embodiment of the present invention, the cold end joint 1, the back plate hot end joint 2, the top plate hot end joint 3 and the side plate hot end joint 4 can be a cube or a cuboid, and the first spherical groove, the second spherical groove and the third spherical groove of the cold end joint 1 are respectively arranged on three surfaces of the cold end joint 1 corresponding to the back plate, top plate and side plate of the external Dewar.

[0031] According to an embodiment of the present invention, the cold end joint 1, the back plate hot end joint 2, the top plate hot end joint 3 and the side plate hot end joint 4 are made of stainless steel.

[0032] According to an embodiment of the present invention, the back plate spherical hinge rod 5, the side plate spherical hinge rod 6 and the top plate spherical hinge rod 7 are composite material structures.

[0033] According to an embodiment of the present invention, the composite material structure includes an epoxy resin matrix and a glass fiber reinforcement.

[0034] That is, each spherical hinge connecting rod can be a composite material structure with epoxy resin as a matrix and glass fiber as a reinforcement.

[0035] Wherein, the glass fiber reinforcement may be a high-strength glass fiber reinforcement.

[0036] According to one embodiment of the present invention, the cold end joint 1 is connected to the outer wall of the inner dewar 9 by welding, the back plate hot end joint 2 is connected to the back plate of the outer dewar 8 by welding, the top plate hot end joint 3 is connected to the top plate of the outer dewar 8 by welding, and the side plate hot end joint 4 is connected to the side plate of the outer dewar 8 by welding.

[0037] Those skilled in the art should understand that the above descriptions on materials and connection methods are merely exemplary and are not intended to limit the present invention.

[0038] An embodiment of the present invention further provides a superconducting magnet, wherein the superconducting magnet includes the temperature deformation compensation support device described in the embodiment.

[0039] That is, the temperature deformation compensation support device described in the above embodiment can be used to compensate for the temperature deformation of the low-temperature container in the superconducting magnet, so as to compensate for the temperature deformation caused by the contraction of the cold end (inner Dewar) while transmitting the electromagnetic and mechanical loads in all directions, thereby preventing the support from being subjected to excessive shear force due to being fixed to the inner Dewar.

[0040] By using the support device described in the above embodiment of the present invention for the force transmission component of a cryogenic container including a superconducting magnet of a maglev train, the spherical hinge structure can be used to make the support rod not subject to shear force to meet the design requirements. The inner dewar of the superconducting magnet is in an extremely low temperature state, and will undergo large cold shrinkage deformation. The two ends of the spherical hinge connecting rod are respectively connected to the inner dewar and the outer dewar by spherical hinges. The spherical hinge does not limit the rotational freedom of the connecting rod. When the inner dewar is cold-shrunk and deformed, the whole shrinks toward the center, and there is a three-dimensional displacement at the edge of the inner dewar. The load caused by the displacement is all borne by the axial force of the three-way connecting rod. In this way, the temperature deformation caused by the contraction of the cold end (inner dewar) can be compensated while transmitting electromagnetic and mechanical loads in all directions.

[0041] It can be seen from the above embodiments that the present invention solves the problem of poor radial mechanical properties of the support rigidly connected to the inner and outer dewars in the prior art, reduces the shear stress form of the support structure, and improves the reliability of the superconducting magnet structure.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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 temperature deformation compensation support device, characterized in that: The device comprises a cold end joint (1), a back plate hot end joint (2), a top plate hot end joint (3), a side plate hot end joint (4), a back plate spherical hinge connecting rod (5), a side plate spherical hinge connecting rod (6) and a top plate spherical hinge connecting rod (7), wherein the cold end joint (1) is provided with a first spherical groove, a second spherical groove and a third spherical groove, and the back plate hot end joint (2), the top plate hot end joint (3) and the side plate hot end joint (4) are respectively provided with spherical grooves. The cold end joint (1) is connected to the outer wall of the inner dewar (9), the back plate hot end joint (2) is connected to the back plate of the outer dewar (8), the top plate hot end joint (3) is connected to the top plate of the outer dewar (8), the side plate hot end joint (4) is connected to the side plate of the outer dewar (8), and the ball at one end of the back plate spherical hinge connecting rod (5) is embedded in the first spherical groove of the cold end joint (1), and the ball at the other end is embedded in the back plate hot end joint (2). The ball at one end of the side plate spherical hinge connecting rod (6) is embedded in the second spherical groove of the cold end joint (1), and the ball at the other end is embedded in the spherical groove of the hot end joint (4) of the side plate; the ball at one end of the top plate spherical hinge connecting rod (7) is embedded in the third spherical groove of the cold end joint (1), and the ball at the other end is embedded in the spherical groove of the hot end joint (3) of the top plate; the cold end joint (1), the back plate hot end joint (2), and the The material of the top plate hot end joint (3) and the side plate hot end joint (4) is stainless steel, the cold end joint (1) is connected to the outer wall of the inner dewar (9) by welding, the back plate hot end joint (2) is connected to the back plate of the outer dewar (8) by welding, the top plate hot end joint (3) is connected to the top plate of the outer dewar (8) by welding, and the side plate hot end joint (4) is connected to the side plate of the outer dewar (8) by welding.

2. The device according to claim 1, characterized in that The back plate spherical hinge connecting rod (5), the side plate spherical hinge connecting rod (6) and the top plate spherical hinge connecting rod (7) are composite material structures.

3. A superconducting magnet, characterized in that: The superconducting magnet comprises the temperature deformation compensation support device according to claim 1 or 2.

Images