CN113495236A - Superconducting magnet vibration test system with background magnetic field - Google Patents
Superconducting magnet vibration test system with background magnetic field Download PDFInfo
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- CN113495236A CN113495236A CN202010264882.8A CN202010264882A CN113495236A CN 113495236 A CN113495236 A CN 113495236A CN 202010264882 A CN202010264882 A CN 202010264882A CN 113495236 A CN113495236 A CN 113495236A
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- 238000012360 testing method Methods 0.000 title claims abstract description 108
- 239000000463 material Substances 0.000 claims description 8
- 229910000861 Mg alloy Inorganic materials 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 4
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 229910001256 stainless steel alloy Inorganic materials 0.000 claims description 3
- 230000005284 excitation Effects 0.000 abstract description 8
- 238000005516 engineering process Methods 0.000 abstract description 2
- BGPVFRJUHWVFKM-UHFFFAOYSA-N N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] Chemical compound N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] BGPVFRJUHWVFKM-UHFFFAOYSA-N 0.000 description 5
- 238000005057 refrigeration Methods 0.000 description 4
- 230000001133 acceleration Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009863 impact test Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/12—Measuring magnetic properties of articles or specimens of solids or fluids
- G01R33/1238—Measuring superconductive properties
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
- G01M7/027—Specimen mounting arrangements, e.g. table head adapters
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- General Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
Abstract
The invention relates to the technical field of superconduction technology and dynamics, and discloses a superconducting magnet vibration test system with a background magnetic field. Wherein, this system includes: the vibration testing device comprises a vibration testing table, a vibration testing tool, a connecting piece, a superconducting magnet, a supporting rod, a background magnet and a supporting frame, wherein the vibration testing tool is arranged on the vibration testing table, the superconducting magnet and the vibration testing tool are connected through the connecting piece, one end of the supporting rod is connected with the superconducting magnet, the other end of the supporting rod is connected with a sliding groove formed in the surface of the background magnet in a matched mode, and the background magnet is fixed on the ground through the supporting frame. Therefore, the electromagnetic and dynamic related performances of the superconducting magnet with the background magnetic field under low temperature and excitation conditions and the volatilization condition of the superconducting magnet refrigerating medium under vibration and impact conditions can be examined.
Description
Technical Field
The invention relates to the technical field of superconduction technology and dynamics, in particular to a superconducting magnet vibration test system with a background magnetic field.
Background
The superconducting magnet has the advantages of large generated magnetic field, small volume, light weight, low loss and the like, and is often applied to the fields of ultrahigh-speed environments, such as ultrahigh-speed maglev trains, ultrahigh-speed electromagnetic ejection, high-speed three-dimensional reservoirs and the like. Taking a superconducting linear motor in an ultra-high-speed maglev train as an example, a superconducting magnet is a rotor part of the superconducting linear motor, and a magnetic field generated by the superconducting magnet interacts with a magnetic field generated by a stator part of the linear motor to generate huge thrust in the superconducting magnet so that the superconducting magnet is rapidly pushed forward. In the process of rapid motion of the superconducting magnet, the superconducting magnet can be influenced by electromagnetic force fluctuation or track irregularity, the superconducting magnet can be subjected to electromagnetic or mechanical vibration of different degrees, the vibrating superconducting coil is simultaneously positioned in a background magnetic field of a stator coil of the linear motor, and the vibration of the superconducting coil is equivalent to cutting the magnetic field of the stator coil of the linear motor.
For the cooling superconducting magnet immersed in the refrigerating medium, the vibration of the superconducting coil in the background magnetic field can bring the following influences: (1) according to the magnetic flux pinning effect of the superconducting material, the superconducting coil cuts magnetic lines of force to generate alternating current loss, the volatilization of the refrigeration medium is accelerated, the larger the vibration excitation is, the faster the refrigeration medium volatilizes, and the higher the quench possibility is; (2) because the refrigerating medium has a natural liquid level, the volatilization of the refrigerating medium can be accelerated by the vibration of the superconducting magnet; (3) when the superconducting magnet is subjected to large vibration, the structural frequency response of the superconducting magnet is abnormal, even the structure is irreversibly damaged, and finally the magnet is quenched. Items (1) and (2) are the thermal load performance of the dynamic superconducting magnet, and item (3) is the structural performance of the superconducting magnet. In order to examine the thermal load performance of the superconducting magnet under vibration and a background magnetic field, verify the rationality and correctness of the heat transfer design and the structural design of the superconducting magnet and examine the volatilization condition of a refrigerating medium under vibration, a vibration test on the superconducting magnet with the background magnetic field is necessary.
However, the existing vibration test system is directed to the vibration test of the conventional superconducting magnet without the background magnetic field, and cannot be used for the vibration test of the superconducting magnet with the background magnetic field.
Disclosure of Invention
The invention provides a superconducting magnet vibration test system with a background magnetic field, which can solve the technical problems in the prior art.
The invention provides a superconducting magnet vibration test system with a background magnetic field, wherein the system comprises: the vibration testing device comprises a vibration testing table, a vibration testing tool, a connecting piece, a superconducting magnet, a supporting rod, a background magnet and a supporting frame, wherein the vibration testing tool is arranged on the vibration testing table, the superconducting magnet and the vibration testing tool are connected through the connecting piece, one end of the supporting rod is connected with the superconducting magnet, the other end of the supporting rod is connected with a sliding groove formed in the surface of the background magnet in a matched mode, and the background magnet is fixed on the ground through the supporting frame.
Preferably, the test tool is in a square or rectangular parallelepiped shape.
Preferably, the cross section of the test tool is trapezoidal or triangular.
Preferably, one end of the support rod matched with the sliding groove is hemispherical, and the sliding groove is a semicircular sliding groove.
Preferably, the vibration test stand comprises a horizontal vibration test stand and a vertical vibration test stand.
Preferably, the sliding grooves include a vertical sliding groove and a horizontal sliding groove.
Preferably, the superconducting magnet and the vibration test tool are connected with the connecting piece in a threaded fit mode or in a welding mode.
Preferably, the support rod is a telescopic support rod.
Preferably, the vibration test bed is made of aluminum alloy, the test tool is made of aluminum magnesium alloy or hard aluminum, and the support rod is made of stainless steel or titanium alloy.
Preferably, the first order natural frequency of the test tool is at least 3 times or more of the first order natural frequency of the superconducting magnet.
Through the technical scheme, the vibration test tool can be arranged on the vibration test table, the superconducting magnet is connected with the vibration test tool through the connecting piece, one end of the supporting rod can be connected with the superconducting magnet, the other end of the supporting rod is connected with the sliding groove formed in the surface of the background magnet in a matched mode, and the background magnet is fixed on the ground through the supporting frame. Therefore, the electromagnetic and dynamic related performances of the superconducting magnet with the background magnetic field under low temperature and excitation conditions and the volatilization condition of the superconducting magnet refrigerating medium under vibration and impact conditions can be examined.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
Fig. 1 shows a schematic diagram of a superconducting magnet vibration testing system with a background magnetic field according to an embodiment of the invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Fig. 1 shows a schematic diagram of a superconducting magnet vibration testing system with a background magnetic field according to an embodiment of the invention.
As shown in fig. 1, an embodiment of the present invention provides a superconducting magnet vibration testing system with a background magnetic field, wherein the system includes: the superconducting magnet testing device comprises a vibration testing table 1, a vibration testing tool 2, a connecting piece 3, a superconducting magnet 4, a supporting rod 5, a background magnet 6 and a supporting frame 7, wherein the vibration testing tool 2 is arranged on the vibration testing table 1, the superconducting magnet 4 and the vibration testing tool 2 are connected through the connecting piece 3, one end of the supporting rod 5 is connected with the superconducting magnet 4, the other end of the supporting rod is connected with a sliding groove formed in the surface of the background magnet 6 in a matched mode, and the background magnet 6 is fixed on the ground 8 through the supporting frame 7.
The vibration test bed vibrates the vibration table board back and forth according to a preset direction by means of electromagnetic force, and vibration excitation can be transmitted to the superconducting magnet through the test tool, so that the superconducting magnet does vibration motion. In addition, the test tool can attenuate the magnetic field of the superconducting magnet to a range which can be borne by the vibration table under the condition of ensuring that the structural strength and the vibration load transmission are not distorted. For the superconducting magnet, special equipment can be used for refrigerating and exciting the superconducting magnet, the superconducting magnet is disconnected with the special equipment after the refrigerating and exciting are completed, and the superconducting magnet vibrates along with the test tool after the vibration excitation of the vibration test table is transmitted to the superconducting magnet.
In addition, in the present invention, the acting force between the superconducting magnet and the background magnet can be expressed as an attractive force by adjusting the current direction of the superconducting magnet or the background magnet. By arranging the supporting rod between the superconducting magnet and the background magnet, the superconducting magnet and the background magnet can be prevented from being attracted together due to overlarge attraction force. For example, the supporting rod and the superconducting magnet may be connected by a thread or welding, and the other end of the supporting rod is connected with a sliding groove on the background magnet in a matching manner. Through the supporting rod, the superconducting magnet can release risks possibly caused by attraction between the superconducting magnet and a background magnet while vibrating.
Through the technical scheme, the vibration test tool can be arranged on the vibration test table, the superconducting magnet is connected with the vibration test tool through the connecting piece, one end of the supporting rod can be connected with the superconducting magnet, the other end of the supporting rod is connected with the sliding groove formed in the surface of the background magnet in a matched mode, and the background magnet is fixed on the ground through the supporting frame. Therefore, the electromagnetic and dynamic related performances of the superconducting magnet with the background magnetic field under low temperature and excitation conditions and the volatilization condition of the superconducting magnet refrigerating medium under vibration and impact conditions can be examined.
According to an embodiment of the present invention, the background magnet may be formed by winding a copper wire and fixed to the ground through a support bracket. Wherein, the background magnet can generate a direct current magnetic field after being electrified with direct current, and the vibrating superconducting magnet cuts the direct current magnetic field.
Because the superconducting magnet and the background magnet have large attraction force after flowing through, the background magnet is fixed on the ground through the support frame, and the superconducting magnet is matched with the background magnet through the support rod, so that the two magnets can be prevented from being stuck together due to overlarge attraction force. The support frame can be a movable support frame, namely the connection part with the ground is movable, so that vibration tests of the superconducting magnet and the background magnet at different distances can be carried out.
According to an embodiment of the invention, the test fixture 2 is in a cube or cuboid shape.
Alternatively, according to an embodiment of the present invention, the cross section of the test fixture 2 is trapezoidal or triangular.
That is, can change aforementioned square or cuboid into the structure that the cross section is trapezoidal or triangle-shaped form, can reduce experimental frock quality to half original at least from this, need not to change experimental frock lower surface area simultaneously, still can guarantee joint strength.
In the case where the cross section of the test fixture 4 is triangular, the test fixture 4 may have a wedge shape, for example.
According to an embodiment of the present invention, the end of the support rod 5 that is engaged with the sliding groove is hemispherical, and the sliding groove is a semicircular sliding groove.
Therefore, the support rod can be better matched with the sliding groove while the support rod slides.
According to an embodiment of the present invention, the vibration test stand 1 includes a horizontal vibration test stand and a vertical vibration test stand.
The vibration test bed vibrates the vibration test bed surface back and forth according to the vertical and horizontal directions by means of electromagnetic force, and can be divided into a vertical vibration test bed and a horizontal vibration test bed according to different vibration directions. The index for measuring the measuring range of the vibration test bed is thrust, the thrust is commonly used in 10t and 35t vibration test beds, and according to the F ═ ma, the thrust is related to the mass and acceleration index of the superconducting magnet (including the test tool). Under the condition that the thrust of the vibration test bed is constant, the acceleration of the test object is smaller when the mass is larger. Conversely, the mass of the test object is ensured to be small as much as possible to meet the requirement of large acceleration input.
According to one embodiment of the invention, the chute comprises a vertical chute and a transverse chute.
When the vibration test bed carries out horizontal vibration test for horizontal vibration test bed, the bracing piece cooperates with horizontal spout, and when the vibration test bed carries out vertical vibration test for vertical vibration test bed, bracing piece and vertical spout cooperation.
According to an embodiment of the invention, the superconducting magnet 4 and the vibration test tool 2 are connected with the connecting piece 3 in a threaded fit manner or in a welding manner.
Therefore, the connection rigidity strength of the test tool and the superconducting magnet can be ensured.
According to an embodiment of the present invention, the support rod 5 is a retractable support rod. The superconducting magnet can also play a supporting role under different distances between the superconducting magnet and a background magnet.
For example, under the same current of the background magnet, the closer the background magnet is to the superconducting magnet, the higher the magnetic field at the surface of the superconducting magnet will be, and therefore by adjusting the distance between the background magnet and the superconducting magnet, the related performance of the superconducting magnet in cutting different magnetic field amplitudes can be examined. Therefore, the telescopic supporting rod can be used for adjusting different distances, so that the relevant performance of the superconducting magnets under different magnetic field conditions can be checked.
According to one embodiment of the invention, the vibration test bed 1 is made of aluminum alloy, the test tool 2 is made of aluminum-magnesium alloy or hard aluminum, and the support rod is made of stainless steel or titanium alloy.
The weight of the test tool can be reduced by adopting aluminum magnesium alloy or hard aluminum for the test tool.
It will be appreciated by persons skilled in the art that the above description of materials is merely exemplary and not intended to limit the present invention. For example, the vibration test bed can be made of other nonmagnetic materials, the test tool can be made of other nonmagnetic materials with lower density and higher strength, and the support rod can be made of other high-strength nonmagnetic materials.
According to an embodiment of the invention, the first order natural frequency of the test tool 2 is at least 3 times or more the first order natural frequency of the superconducting magnet 4.
Therefore, resonance between the test tool and the superconducting magnet can be prevented.
It should be understood by those skilled in the art that the description of the shape configuration of the test fixture in the above embodiments is merely exemplary, and the present invention is not limited thereto. Any other shape configuration that meets the natural frequency requirements may be applied to the present invention.
It should be understood by those skilled in the art that although the above description is directed to a superconducting magnet as a test piece for performing a vibration impact test, the present invention is not limited thereto, and for example, any magnetic test object may use the test tool to perform a vibration impact test with a background magnetic field, such as a permanent magnet, a charged conventional coil, etc.
Further, although the above-described vibration test system of the present invention is described in the above-described embodiment as being used for the vibration test of the superconducting magnet under the condition of excitation refrigeration, the present invention is not limited thereto. For example, the vibration test system can also be applied to a vibration test of a non-refrigeration non-excitation structure, the test does not need to refrigerate and excite the superconducting magnet, only needs to turn on the gain of the vibration table to carry out the structural vibration of the superconducting magnet, and only examines the structural performance of the superconducting magnet at normal temperature.
In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A superconducting magnet vibration testing system with a background magnetic field, the system comprising: the device comprises a vibration test table (1), a vibration test tool (2), a connecting piece (3), a superconducting magnet (4), a supporting rod (5), a background magnet (6) and a supporting frame (7), wherein the vibration test tool (2) is arranged on the vibration test table (1), the superconducting magnet (4) and the vibration test tool (2) are connected through the connecting piece (3), one end of the supporting rod (5) is connected with the superconducting magnet (4), the other end of the supporting rod is connected with a sliding groove formed in the surface of the background magnet (6) in a matched mode, and the background magnet (6) is fixed on the ground (8) through the supporting frame (7).
2. The system according to claim 1, characterized in that the test fixture (2) is in the shape of a cube or cuboid.
3. The system according to claim 1, characterized in that the cross section of the test tool (2) is trapezoidal or triangular.
4. A system according to any one of claims 1-3, characterized in that the end of the support bar (5) engaging the slide groove is hemispherical, and the slide groove is a semicircular slide groove.
5. A system according to any one of claims 1-3, characterized in that the vibration test stand (1) comprises a horizontal vibration test stand and a vertical vibration test stand.
6. The system of any one of claims 1-3, wherein the chute comprises a vertical chute and a lateral chute.
7. The system according to any one of claims 1-3, wherein the superconducting magnet (4) and the vibration testing tool (2) are connected with the connecting piece (3) in a threaded fit manner or in a welding manner.
8. A system according to any one of claims 1-3, characterized in that the support bar (5) is a telescopic support bar.
9. The system according to any one of claims 1 to 3, characterized in that the material of the vibration test stand (1) is aluminum alloy, the material of the test tool (2) is aluminum-magnesium alloy or hard aluminum, and the material of the support rod is stainless steel or titanium alloy.
10. A system according to any of claims 1-3, wherein the first order natural frequency of the trial tooling (2) is at least 3 times or more the first order natural frequency of the superconducting magnet (4).
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114114104A (en) * | 2021-11-19 | 2022-03-01 | 中车长春轨道客车股份有限公司 | Method and device for determining functional integrity of superconducting magnet |
| CN115688441A (en) * | 2022-11-04 | 2023-02-03 | 中车长春轨道客车股份有限公司 | Impact-resistant design method and device for high-temperature superconducting magnet of electric levitation train |
| CN117368812A (en) * | 2023-12-08 | 2024-01-09 | 西南交通大学 | Method and device for measuring magnetic field intensity of high-temperature superconductive magnetic levitation transportation system |
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