CN115102428B - Flat magnetic suspension device - Google Patents
Flat magnetic suspension device Download PDFInfo
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- CN115102428B CN115102428B CN202210929781.7A CN202210929781A CN115102428B CN 115102428 B CN115102428 B CN 115102428B CN 202210929781 A CN202210929781 A CN 202210929781A CN 115102428 B CN115102428 B CN 115102428B
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- rotor
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- stators
- rotors
- flat magnetic
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N15/00—Holding or levitation devices using magnetic attraction or repulsion, not otherwise provided for
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K55/00—Dynamo-electric machines having windings operating at cryogenic temperatures
- H02K55/02—Dynamo-electric machines having windings operating at cryogenic temperatures of the synchronous type
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/60—Superconducting electric elements or equipment; Power systems integrating superconducting elements or equipment
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Superconductive Dynamoelectric Machines (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
The existing full-superconducting magnetic suspension bearing only adopts a pair of stator and rotor, if large magnetic suspension force is required, the axial dimension or the radius of a rotating shaft is required to be enlarged, so that the bearing is huge in structure and narrow in application range. Therefore, the applicant improves the device and designs a flat magnetic suspension device, a plurality of rotor rings and stator rings matched with the rotor rings are arranged in an array manner on the radial direction of a rotating shaft, the axial size of the magnetic suspension device is effectively reduced, and meanwhile, larger magnetic suspension force is improved.
Description
Technical Field
The invention relates to a flat magnetic suspension device.
Background
The magnetic suspension device has small friction loss due to no contact. The magnetic suspension device uses the magnetic field generated by the electrified coil or the magnet to counteract the gravity born by the rotor and the force generated in the motion of the rotor, so that the rotor is in a suspended state. The full-superconducting magnetic suspension device uses superconducting materials to replace copper coils or magnets of the common magnetic suspension device, and the magnetic field generated by the full-superconducting magnetic suspension device is stronger due to the large superconducting current density, so that the full-superconducting magnetic suspension device has larger bearing capacity under the same volume.
Some existing magnetic levitation devices operate in a vacuum environment, and the superconducting material must be cooled in a sealed manner during use. The common full-superconducting magnetic suspension device has the advantages that the superconducting parts are respectively arranged on the stator and the rotor, and the rotor is in a moving state in the actual use process, so that the sealing and cooling of the rotor are very difficult to be higher than that of the stator, and particularly, under the condition that the rotor is a rotating shaft rotating at a high speed. The applicant has thus invented a fully superconducting magnetic bearing. However, if a large magnetic levitation force is to be obtained, the axial dimension of the bearing or the radius of the rotating shaft must be enlarged, which results in a large structure of the bearing and a narrow application range. The applicant has therefore made improvements in this device, and devised a flat magnetic levitation device which reduces the volume of the device, and in particular allows for small volumes and large levitation forces in devices where there is a requirement for axial dimensions.
Disclosure of Invention
The invention aims to provide a flat magnetic levitation device which has large bearing capacity, small volume, strong stability and easy realization of sealing and cooling in use, so as to solve the technical problem of huge structure of the traditional full-superconducting magnetic levitation device. The technical scheme adopted is as follows:
a flat magnetic levitation device, characterized in that: the high-temperature superconducting device comprises a plurality of stators, a plurality of rotors, superconducting coils, high-temperature superconductors, rotor connecting pieces and stator connecting pieces; the stators and the rotors have the same axle center; the stators are respectively arranged one-to-one with the rotors; the rotor is axially provided with two convex rings protruding along the same radial direction; a spacing space exists between two convex rings protruding along the same radial direction on the same rotor; the high-temperature superconductor is fixedly connected to the position corresponding to the convex ring on the stator; a superconducting coil is arranged between the middle parts of each stator and each rotor, and the superconducting coils are fixedly connected with the stators; the stators are connected by stator connecting pieces, and the rotors are connected by rotor connecting pieces; a gap exists between the convex ring and the opposite high temperature superconductor.
Further, the rotor positioned in the middle is a rotating shaft, the other rotors are circular rings, and the stator is of a circular ring structure. The shaft is axially distributed with two radially outwardly projecting collars. Two stators are arranged outside the rotating shaft, two rotors are arranged outside the two stators, the two stators and the two rotors are alternately arranged outwards along the radial direction, and the outermost structure is a stator ring. The two stators are closely attached, and the two rotors are closely attached; or the two stators are of an integral structure, and the two rotors are of an integral structure. Two convex rings are positioned on the surface of the stator opposite to the rotor.
Further, the rotor positioned at the middle is a circular ring, so that the external device can penetrate into the center of the circular ring to be fixed.
Further, the outermost structure may be a rotor ring.
Further, a positioning device is arranged between the outermost stator and the rotor, and the convex ring and the high-temperature superconductor are staggered by 0-10mm when the positioning device works.
Further, after the superconducting coil is brought into a superconducting state, direct current is supplied to the superconducting coil, and then the high-temperature superconductor is cooled to bring the superconducting coil into a superconducting state. The positioning device is then closed and the rotor forms a stable suspension inside the stator.
Compared with the prior art, the invention has the beneficial effects that:
a plurality of rotor rings and stator rings matched with the rotor rings are arranged in an array manner on the radial direction of the rotating shaft, so that the axial size of the magnetic suspension device is effectively reduced, and simultaneously, the larger magnetic suspension force is improved.
Drawings
FIG. 1: cross-sectional view of flat magnetic suspension device
Reference numerals: 1. stator, 2, backboard, 3, rotor, 4, high temperature superconductor, 5, superconducting coil, 6, rotor connector
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings in conjunction with the detailed description.
As shown in fig. 1, the flat magnetic levitation device comprises a plurality of stators, a plurality of rotors, superconducting coils, high-temperature superconductors, rotor connectors and stator connectors; the stators and the rotors have the same axle center; the stators are respectively arranged one-to-one with the rotors; the rotor is axially provided with two convex rings protruding along the same radial direction; a spacing space exists between two convex rings protruding along the same radial direction on the same rotor; the high-temperature superconductor is fixedly connected to the position corresponding to the convex ring on the stator; a superconducting coil is arranged between the middle parts of each stator and each rotor, and the superconducting coils are fixedly connected with the stators; the stators are connected by stator connecting pieces, and the rotors are connected by rotor connecting pieces; a gap exists between the convex ring and the opposite high temperature superconductor. The stator, the superconducting coil and the high-temperature superconductor are arranged in the sealed container.
Specifically, as shown in fig. 1, the rotor located in the middle is a rotating shaft, the rest of the rotors are circular rings, and the stator is of a circular ring structure. The shaft is axially distributed with two radially outwardly projecting collars. Two stators are arranged outside the rotating shaft, two rotors are arranged outside the two stators, the two stators and the two rotors are alternately arranged outwards along the radial direction, and the outermost structure is a stator ring. The two stators are closely attached, and the two rotors are closely attached; or the two stators are of an integral structure, and the two rotors are of an integral structure. Two convex rings are positioned on the surface of the stator opposite to the rotor.
The rotor positioned at the middle is a circular ring, so that an external device can penetrate into the center of the circular ring to be fixed.
The outermost structure may also be a rotor ring.
The high-temperature superconductor can be in a ring structure or a ring structure formed by combining a plurality of fan-shaped structures.
As shown in fig. 1, the stator may be provided with an annular groove in the middle, and the superconducting coil is disposed inside the annular groove.
The stator may be provided without grooves, and a portion of the superconducting coil is positioned inside the grooves formed between the collars of the rotor. And a backboard is arranged on one side of the high-temperature superconductor, which is close to the convex ring, so that the backboard improves the system strength and the magnetic field utilization rate. The stator, the back plate and the rotor are all made of magnetic conductive materials.
The superconducting coils include low-temperature superconducting coils and high-temperature superconducting coils.
The surface of the sealing container of the stator at the outermost side is provided with an annular bracket concentric with the stator, a plurality of supports are uniformly arranged on the annular bracket, the normal line of the support surface is perpendicularly intersected with the axis of the rotor, the support surface is provided with a hydraulic cylinder, a sliding rod is arranged in the hydraulic cylinder in a sliding way, and the top of the sliding rod is fixedly connected with a sphere. The bottom of the hydraulic cylinder is provided with a hydraulic oil inlet and a hydraulic oil outlet and a valve. The surface of the rotor at the outermost side is provided with a ball seat opposite to the surface of the support, and the surface of the ball seat opposite to the surface of the support is provided with a groove with the same diameter as the sphere.
The inlet and outlet of all the hydraulic cylinders are connected in parallel to the same external hydraulic device, the external hydraulic device injects hydraulic oil into the ball body of the hydraulic cylinder driving sliding rod to abut against the inside of the ball seat, after the pressure value of the external hydraulic device reaches a certain value, the valve on the hydraulic cylinder is closed, and then the connection between the external hydraulic device and the inlet and outlet of the hydraulic cylinder is disconnected. When the sphere is completely abutted against the inside of the groove, the convex ring is staggered from the high-temperature superconductor by 0-10mm.
After the superconducting coil enters a superconducting state, direct current is supplied to the superconducting coil, and then the high-temperature superconductor is cooled to enter the superconducting state. The hydraulic oil in the hydraulic cylinder is then pumped out by means of an external hydraulic device and the valve is closed. The rotor forms a stable suspension inside the stator.
The buffer device is arranged on the surface of the stator, which is opposite to the rotor connecting piece, and comprises magnets which are respectively arranged on the rotor connecting piece and the stator, wherein the magnets on the rotor connecting piece are opposite to the magnets on the stator in position, and the polarities of the opposite surfaces are opposite. The damping device further comprises balls arranged on the surface of the stator opposite to the rotor connecting piece, the balls can rotate freely on the surface of the stator, and the distance between the top of each ball and the surface of the stator is larger than the height of the stator magnet.
Further, a damping device may also be provided between the stator connection and the rotor. Correspondingly, balls are arranged on the surface of the stator connecting piece, magnets with opposite polarities are respectively arranged between the stator connecting piece and the opposite surfaces of the rotor, and the heights of the balls are larger than those of the magnets.
Further, a retractable structure, such as a passive retractable structure of a cylinder, a spring, etc., is arranged between the ball and the stator or the stator connecting piece.
Further, the passive telescoping structure is in a maximum compression state with the height of the balls being greater than the height of the magnets.
Claims (10)
1. A flat magnetic levitation device, characterized in that: the high-temperature superconducting device comprises a plurality of stators, a plurality of rotors, superconducting coils, high-temperature superconductors, rotor connecting pieces and stator connecting pieces; the stators and the rotors have the same axle center; the stators are respectively arranged one-to-one with the rotors; each rotor is axially provided with two convex rings protruding along the same radial direction; a spacing space exists between two convex rings protruding along the same radial direction on the same rotor; the high-temperature superconductor is fixedly connected to the position corresponding to the convex ring on the stator; a superconducting coil is arranged between the middle parts of each stator and each rotor, and the superconducting coils are fixedly connected with the stators; the stators are connected by stator connecting pieces, and the rotors are connected by rotor connecting pieces; a gap exists between the convex ring and the opposite high temperature superconductor.
2. A flat magnetic levitation apparatus of claim 1, wherein: the rotor positioned in the middle is a rotating shaft, the rest rotors are circular rings, and the stator is of a circular ring structure.
3. A flat magnetic levitation apparatus of claim 1, wherein: the rotor positioned in the middle is a circular ring, and the stator is of a circular ring structure.
4. A flat magnetic levitation apparatus of claim 2, wherein: the rotating shaft is axially provided with two convex rings which protrude outwards in the radial direction.
5. A flat magnetic levitation apparatus of claim 4, wherein: two stators are arranged outside the rotating shaft, two rotors are arranged outside the two stators, the two stators and the two rotors are alternately arranged outwards in the radial direction, and the outermost structure is a stator ring or a rotor ring.
6. A flat magnetic levitation apparatus of claim 5, wherein: the two stators are closely attached, and the two rotors are closely attached; or the two stators are of an integral structure, and the two rotors are of an integral structure; two convex rings are positioned on the surface of the stator opposite to the rotor.
7. A flat magnetic levitation apparatus of claim 1, wherein: a positioning device is provided between the outermost stator and the outermost rotor.
8. A flat magnetic levitation apparatus of claim 6, wherein: when the positioning device works, the convex ring and the high-temperature superconductor are staggered by 0-10mm.
9. A flat magnetic levitation apparatus of claim 7, wherein: after the superconducting coil enters a superconducting state, direct current is supplied to the superconducting coil, and then the high-temperature superconductor is cooled to enter the superconducting state; the positioning device is then closed and the rotor forms a stable suspension inside the stator.
10. A flat magnetic levitation apparatus of claim 1, wherein: a damping device is provided between the stator and the rotor connection or between the stator connection and the rotor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210929781.7A CN115102428B (en) | 2022-08-03 | 2022-08-03 | Flat magnetic suspension device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210929781.7A CN115102428B (en) | 2022-08-03 | 2022-08-03 | Flat magnetic suspension device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115102428A CN115102428A (en) | 2022-09-23 |
| CN115102428B true CN115102428B (en) | 2023-04-28 |
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ID=83300120
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210929781.7A Active CN115102428B (en) | 2022-08-03 | 2022-08-03 | Flat magnetic suspension device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115102428B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001041241A (en) * | 1999-07-30 | 2001-02-13 | Mitsubishi Heavy Ind Ltd | Superconductive magnetic levitation device, supercondutive power storing method, and superconductive magnetic bearing examinating method |
| CN101119047A (en) * | 2007-07-25 | 2008-02-06 | 上海大学 | High temperature superconducting magnetic suspension frequency conversion electric motor |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2882203B1 (en) * | 2005-02-15 | 2007-06-22 | Levisys Sarl | METHOD FOR STABILIZING A SUSPENDED OBJECT IN A MAGNETIC FIELD |
| CN101515774B (en) * | 2009-03-26 | 2012-06-27 | 上海大学 | High-temperature superconducting permanent magnetic hybrid magnetic suspension variable-frequency motor |
| CN201461737U (en) * | 2009-05-26 | 2010-05-12 | 西南交通大学 | High-temperature superconductive magnetic suspension radial bearing |
| CN112994525B (en) * | 2021-02-26 | 2022-04-08 | 河南理工大学 | Superconductive-permanent magnet mixed magnetic suspension low-temperature disc type immersed pump |
| CN214591213U (en) * | 2021-03-23 | 2021-11-02 | 中国科学院深圳先进技术研究院 | Magnetic suspension system |
-
2022
- 2022-08-03 CN CN202210929781.7A patent/CN115102428B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001041241A (en) * | 1999-07-30 | 2001-02-13 | Mitsubishi Heavy Ind Ltd | Superconductive magnetic levitation device, supercondutive power storing method, and superconductive magnetic bearing examinating method |
| CN101119047A (en) * | 2007-07-25 | 2008-02-06 | 上海大学 | High temperature superconducting magnetic suspension frequency conversion electric motor |
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| Publication number | Publication date |
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| CN115102428A (en) | 2022-09-23 |
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