CN114710004A - Composite magnetism-gathering permanent magnet-superconducting coupling transmission device for low-temperature pump - Google Patents

Composite magnetism-gathering permanent magnet-superconducting coupling transmission device for low-temperature pump Download PDF

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Publication number
CN114710004A
CN114710004A CN202210468193.8A CN202210468193A CN114710004A CN 114710004 A CN114710004 A CN 114710004A CN 202210468193 A CN202210468193 A CN 202210468193A CN 114710004 A CN114710004 A CN 114710004A
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CN
China
Prior art keywords
permanent magnet
superconducting
gathering
magnetic
shaped
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Pending
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CN202210468193.8A
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Chinese (zh)
Inventor
艾立旺
苗森
许孝卓
肖磊
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Henan University of Technology
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Henan University of Technology
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Priority to CN202210468193.8A priority Critical patent/CN114710004A/en
Publication of CN114710004A publication Critical patent/CN114710004A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K49/00—Dynamo-electric clutches; Dynamo-electric brakes
    • H02K49/10—Dynamo-electric clutches; Dynamo-electric brakes of the permanent-magnet type
    • H02K49/104—Magnetic couplings consisting of only two coaxial rotary elements, i.e. the driving element and the driven element
    • H02K49/108—Magnetic couplings consisting of only two coaxial rotary elements, i.e. the driving element and the driven element with an axial air gap
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C32/00—Bearings not otherwise provided for
    • F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
    • F16C32/0406—Magnetic bearings
    • F16C32/0408—Passive magnetic bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C32/00—Bearings not otherwise provided for
    • F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
    • F16C32/0406—Magnetic bearings
    • F16C32/0408—Passive magnetic bearings
    • F16C32/0436—Passive magnetic bearings with a conductor on one part movable with respect to a magnetic field, e.g. a body of copper on one part and a permanent magnet on the other part
    • F16C32/0438—Passive magnetic bearings with a conductor on one part movable with respect to a magnetic field, e.g. a body of copper on one part and a permanent magnet on the other part with a superconducting body, e.g. a body made of high temperature superconducting material such as YBaCuO
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2793—Rotors axially facing stators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/08—Structural association with bearings
    • H02K7/09—Structural association with bearings with magnetic bearings
    • 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

Abstract

The invention belongs to the field of magnetic coupling transmission in cryogenic engineering, and particularly relates to a composite magnetic gathering type permanent magnet-superconducting coupling transmission device for a cryogenic pump, wherein the cryogenic pump comprises a pump shell, an impeller shaft, an impeller, an input shaft and a permanent magnet rotor yoke which are arranged outside the pump shell, and a superconducting rotor yoke and an output shaft which are arranged inside the pump shell; the inner side of the permanent magnet rotor yoke is provided with a plurality of U-shaped grooves in which composite magnetism gathering type U-shaped permanent magnet poles and magnetic conductive iron sheets are arranged, a circle of fan-shaped superconducting sheets are distributed on the superconducting rotor yoke at intervals, the permanent magnet poles and the superconducting sheets are correspondingly connected in a non-contact mode at intervals of working air gaps, the middle of the superconducting rotor yoke is rotatably connected with a suspension component through a radial magnetic suspension bearing, and the outer side of the superconducting rotor yoke is fixedly connected with an output shaft. By improving the arrangement mode of the magnetic poles of the permanent magnetic disk, the magnetic leakage of the permanent magnetic rotor is reduced, and the distribution of an excitation magnetic field is improved; the superconducting sheet has the advantages that the strong capture magnetic field and the high current-carrying density of the superconducting sheet are utilized, the transmission torque is improved, and the non-contact torque transmission from the normal temperature end to the low temperature end is realized.

Description

Composite magnetism-gathering permanent magnet-superconducting coupling transmission device for low-temperature pump
Technical Field
The invention belongs to the field of magnetic coupling transmission in low-temperature engineering, and particularly relates to a composite magnetism-gathering permanent magnet-superconducting coupling transmission device for a low-temperature pump.
Background
The production and conveying of low-temperature liquid such as low-temperature clean energy, low-temperature propellant of aerospace vehicles and the like are mostly finished by adopting a low-temperature pumping device. At present, a long shaft coupled pump-machine separated structure is mostly adopted in small and medium-sized cryogenic liquid pumps, and due to the fact that the temperature difference between two ends of a pump machine connected by a long shaft is large, the problems of difficulty in sealing and multiple faults exist in the pumping device.
With the development of permanent magnetic materials, magnetic transmission technology is proposed and used for various mechanical devices such as fans and pumps. The magnetic coupling transmission technology is used for the long-shaft coupling type low-temperature liquid pump, and the torque of the motor at the normal temperature end can be transmitted to the impeller at the low temperature end in a non-contact mode. The magnetic coupling transmission technology can realize non-contact torque transmission, can avoid friction loss of a traditional mechanical transmission mode when applied to mechanical equipment such as pumps and the like, and can convert rotary dynamic sealing into static sealing. For example, patent publication No. CN210859251U, which uses a magnetic coupling in a magnetically driven pump, realizes contactless transmission of motor torque; the patent publication No. N112311197B discloses a 90-degree Halbach arrangement of a double-layered permanent magnet rotor and a conductor rotor, in which one permanent magnet disk and the other permanent magnet disk are separated by an aluminum housing, the double-layered composite permanent magnet rotor is driven by a motor, and the eddy current generated by the conductor rotor causes the conductor rotor to rotate in a changing magnetic field, thereby realizing contactless torque transmission.
However, under the influence of low temperature environment, the fragility of the permanent magnetic material of the conventional magnetic coupler is enhanced, the mechanical strength is reduced, and the copper material generates electromagnetic torque and also generates large eddy current loss, so that low-temperature liquid is vaporized. In addition, the driving side and the driven side of the magnetic coupler are separated from the container wall, the working air gap is large, and the lifting space for transmitting torque is limited. In view of extremely low temperature environment and large air gap working condition, the magnetic coupling transmission device is difficult to meet the technical requirements of low-temperature liquid pump application.
Disclosure of Invention
Aiming at the defects of the existing magnetic transmission technology in the low-temperature liquid pumping process, the invention provides a composite magnetism-gathering type permanent magnet-superconducting coupling transmission device which can adapt to large air gap and low-temperature working conditions and has the characteristics of stability, reliability and easiness in separation.
In order to achieve the purpose, the invention adopts the following technical scheme:
a composite magnetism gathering type permanent magnet-superconducting coupling transmission device for a cryogenic pump comprises a motor, a coupler and the cryogenic pump, wherein the cryogenic pump comprises a pump shell, an impeller shaft and an impeller which are arranged inside the pump shell, a pump inlet and a pump outlet are formed in the pump shell, the composite magnetism gathering type permanent magnet-superconducting coupling transmission device further comprises an input shaft and a permanent magnet rotor yoke which are arranged on the outer side of the pump shell of a drive end of the cryogenic pump, and a superconducting rotor yoke and an output shaft which are arranged on the inner side of the pump shell of the drive end of the cryogenic pump; the motor is connected with an input shaft of the cryogenic pump through a coupler, the input shaft is coaxially and fixedly connected with a permanent magnet rotor yoke, a plurality of U-shaped grooves are formed in the inner side of the permanent magnet rotor yoke along the circumferential direction, composite magnetism-gathering U-shaped permanent magnet poles are arranged in the U-shaped grooves in a matched mode, and magnetic conductive iron sheets are arranged in the middles of the composite magnetism-gathering U-shaped permanent magnet poles; one side of the superconducting rotor yoke, which is close to the permanent magnet rotor yoke, is provided with a circle of fan-shaped superconducting sheets at intervals, the composite magnetism-gathering U-shaped permanent magnet poles are correspondingly connected with the superconducting sheets in a non-contact mode, a working air gap is reserved between the composite magnetism-gathering U-shaped permanent magnet poles and the superconducting sheets, one end, facing the working air gap, of the output shaft is coaxially and fixedly connected with a suspension component, the middle of the superconducting rotor yoke is rotatably connected with the suspension component through a radial magnetic suspension bearing, and the outer side of the superconducting rotor yoke is fixedly connected with the output shaft.
Furthermore, the composite magnetism-gathering U-shaped permanent magnet pole is formed by sequentially and closely jointing and splicing the cross sections of a first permanent magnet, a second permanent magnet, a third permanent magnet, a fourth permanent magnet and a fifth permanent magnet according to a U shape, wherein the cross sections of the second permanent magnet and the fourth permanent magnet are fan-shaped, and the magnetizing directions of the permanent magnets point to the magnetic conductive iron sheet.
Furthermore, the composite magnetism-gathering U-shaped permanent magnet pole is formed by sequentially and closely attaching and splicing a sixth permanent magnet, a seventh permanent magnet and an eighth permanent magnet in a U-shaped manner, wherein the cross section of the seventh permanent magnet is semicircular, and the magnetizing directions of the permanent magnets point to the magnetic conductive iron sheet.
Furthermore, the composite magnetism gathering U-shaped permanent magnet pole in the U-shaped groove of the permanent magnet rotor yoke is fixedly connected with the permanent magnet rotor yoke.
Furthermore, the radial magnetic suspension bearing comprises an inner ring and an outer ring which are coaxially sleeved, the inner ring is a superconducting stator, the outer ring is a permanent magnet rotor, and a suspension gap is reserved between the inner ring and the outer ring.
Further, the superconducting sheets are fixedly arranged on the superconducting rotor yoke.
Furthermore, the composite magnetism-gathering U-shaped permanent magnet poles and the superconducting sheets are arranged at equal intervals or unequal intervals, and the superconducting sheets on the driven side are arranged at unequal intervals, so that torque fluctuation can be reduced, and output torque is more stable.
Furthermore, the superconducting sheets are made of superconducting bulk materials or stacked superconducting tapes.
The present invention also includes other components that enable its normal use, all by conventional means in the art, and further, devices or components not limited by the present invention, such as: the motor, the coupling, the pump shell, the impeller shaft, the impeller and the like are all in the prior art.
The invention has the following beneficial effects:
according to the composite magnetism-gathering type permanent magnet-superconducting coupling transmission device for the low-temperature pump, the permanent magnet disc on the driving side adopts the U-shaped magnetic pole unit, so that magnetic leakage can be greatly reduced, the utilization rate of a permanent magnet is improved, the axial magnetic density of a working air gap of the coupling device is enhanced, larger torque is transmitted, eddy current loss is obviously reduced, temperature rise is reduced, and the transmission characteristic of the permanent magnet-superconducting magnetic coupling transmission device is improved; the axial force between the driving disc and the driven disc is small, so that the axial load of the magnetic suspension bearing is reduced, and the service life of the magnetic suspension bearing is prolonged; the heat loss generated by the submerged low-temperature motor is avoided, and the heat leakage problem and the low-temperature rotary dynamic sealing problem caused by a long shaft mechanical coupling structure are eliminated; effectively utilizes the cooling environment provided by the low-temperature medium, and omits a refrigeration system required by a superconductor.
The arrangement of the permanent magnet rotor and the superconducting rotor is designed by utilizing the high current-carrying density and strong capture magnetic field characteristics of the superconductor, so that the stable non-contact transmission of the motor torque is realized; in order to improve the torque transmission performance of the permanent magnet-superconducting coupling transmission device, the U-shaped magnetic pole is used for greatly improving the axial air gap flux density of the permanent magnet-superconducting coupling transmission device by designing and combining the shapes of the magnetic poles and comparing the magnetic field distribution rules of the magnetic flux gathering type magnetic pole, the Halbach magnetic pole, the U-shaped magnetic pole and the like, so that the transmission torque of the device is improved, and the permanent magnet-superconducting coupling transmission device has the advantages of stability, reliability, large transmission torque and easiness in separation.
Drawings
Fig. 1 is a schematic structural view of a composite magnetism-gathering type permanent magnet-superconducting coupled transmission device in embodiment 1.
Fig. 2 is a three-dimensional exploded view of a combination of a driving-side permanent magnetic disk and a driven-side superconducting disk in example 1.
Fig. 3 is a three-dimensional assembly view of a combination of the driving side permanent magnet disk and the driven side superconducting disk in embodiment 1.
Fig. 4 is a schematic structural view of the radial magnetic bearing in embodiment 1.
Fig. 5 is a three-dimensional exploded view of the composite magnetism-gathering U-shaped permanent magnet pole in example 1.
Fig. 6 is a schematic structural view of the composite magnetism-gathering type permanent magnet-superconducting coupled transmission device in embodiment 2.
Fig. 7 is a three-dimensional exploded view of the composite magnetic concentrating U-shaped permanent magnet pole of example 2.
FIG. 8 is a two-dimensional simulation diagram of axial magnetic flux density of Halbach, magnetic concentration type and U-shaped magnetic poles at a position of an air gap of 1 mm.
FIG. 9 is a two-dimensional simulation diagram of torque transmission characteristics of Halbach, magnetism-gathering type and U-shaped magnetic poles under equal magnetic quantity.
In the figure: 1. an electric motor; 2. a coupling; 3. an input shaft; 4. a permanent magnet rotor yoke; 5. a magnetically conductive iron sheet; 6. a U-shaped groove; 7. a composite magnetism gathering U-shaped permanent magnet pole; 8. a first permanent magnet; 9. a second permanent magnet; 10. a third permanent magnet; 11. a fourth permanent magnet; 12. a fifth permanent magnet; 13. a working air gap; 14. a superconducting rotor yoke; 15. a superconducting sheet; 16. an output shaft; 17. a radial magnetic suspension bearing; 17-1, a radial magnetic suspension bearing superconducting stator; 17-2, radial magnetic suspension bearing permanent magnet rotor; 18. a suspension member; 19. a pump housing; 20. an impeller shaft; 21. an impeller; 22. a pump inlet; 23. an outlet of the pump; 24. a sixth permanent magnet; 25. a seventh permanent magnet; 26. and an eighth permanent magnet.
Detailed Description
The technical solutions of the present invention will be clearly and completely described below with reference to specific embodiments, and it should be understood that the described embodiments are only some embodiments, but not all embodiments, of the present invention.
Example 1
As shown in fig. 1-3, a composite magnetic-gathering type permanent magnet-superconducting coupling transmission device for a cryopump comprises a motor 1, a coupling 2 and the cryopump, wherein the cryopump comprises a pump shell 19, an impeller shaft 20 and an impeller 21 which are arranged inside the pump shell 19, the pump shell 19 is provided with a pump inlet 22 and a pump outlet 23, the cryopump further comprises an input shaft 3 and a permanent magnet rotor yoke 4 which are arranged outside the pump shell 19 at the drive end of the cryopump, and a superconducting rotor yoke 14 and an output shaft 16 which are arranged inside the pump shell 19 at the drive end of the cryopump; the motor 1 is connected with an input shaft 3 of the cryogenic pump through a coupler 2, and the input shaft 3 is coaxially and fixedly connected with a permanent magnet rotor yoke iron 4; a plurality of U-shaped grooves 6 are formed in the inner side of the permanent magnet rotor yoke 4 along the circumferential direction, composite magnetism-gathering U-shaped permanent magnet poles 7 are arranged in the U-shaped grooves 6 in a matched mode, and magnetic conductive iron sheets 5 are arranged in the middles of the composite magnetism-gathering U-shaped permanent magnet poles 7; one side of the superconducting rotor yoke 14 close to the permanent magnet rotor yoke 4 is provided with a circle of fan-shaped superconducting sheets 15 at intervals, the composite magnetic gathering U-shaped permanent magnet pole 7 is correspondingly connected with the superconducting sheets 15 in a non-contact mode, a working air gap 13 is reserved between the composite magnetic gathering U-shaped permanent magnet pole 7 and the superconducting sheets 15, one end, facing the working air gap 13, of an output shaft 16 is fixedly connected with a suspension component 18 coaxially, the middle of the superconducting rotor yoke 14 is rotatably connected with the suspension component 18 through a radial magnetic suspension bearing 17, and the outer side of the superconducting rotor yoke 14 is fixedly connected with the output shaft 16.
The permanent magnet rotor yoke iron 4 is used as a driving side permanent magnet disc and connected with the motor 1 to provide power torque, the superconducting rotor yoke iron 14 is used as a driven side superconducting disc and connected with an output shaft 16 to drive a load to rotate, a working air gap of 5-10mm is formed between the driving side permanent magnet disc and the driven side superconducting disc and is separated by a pump shell 19, and non-contact power transmission is achieved completely through magnetic force conduction.
And the composite magnetism-gathering U-shaped permanent magnet pole 7 in the U-shaped groove 6 of the permanent magnet rotor yoke iron 4 is fixedly connected with the permanent magnet rotor yoke iron 4. The superconducting sheet 15 is fixedly arranged on the superconducting rotor yoke 14. The superconducting sheet 15 is made of superconducting bulk material. The composite magnetism-gathering U-shaped permanent magnet pole 7 and the superconducting sheet 15 are arranged at equal intervals.
As shown in fig. 4, the radial magnetic suspension bearing 17 includes an inner ring and an outer ring coaxially sleeved, the inner ring is a superconducting stator 17-1, the outer ring is a permanent magnet rotor 17-2, and a suspension gap is left between the inner ring and the outer ring.
As shown in fig. 5, the composite magnetism-gathering U-shaped permanent magnet pole 7 is formed by sequentially and closely attaching and splicing a first permanent magnet 8, a second permanent magnet 9, a third permanent magnet 10, a fourth permanent magnet 11 and a fifth permanent magnet 12 in cross section according to a U shape, wherein the second permanent magnet 9 and the fourth permanent magnet 11 are fan-shaped in cross section, and the magnetizing directions of the permanent magnets point to the magnetic conductive iron sheet 5.
Example 2
As shown in fig. 6 to 7, this embodiment is different from embodiment 1 only in that: the composite magnetism-gathering U-shaped permanent magnet pole 7 is formed by sequentially and closely jointing and splicing a sixth permanent magnet 24, a seventh permanent magnet 25 and an eighth permanent magnet 26 in a U shape, wherein the cross section of the seventh permanent magnet 25 is semicircular, and the magnetizing directions of the permanent magnets point to the magnetic conductive iron sheet 5.
As shown in fig. 8, under the condition that the magnetic poles in different combination forms are made of the same amount of permanent magnet materials, the axial magnetic flux density of the two-dimensional expansion model at the air gap position of 1mm is obtained, wherein Halbach and the magnetism-gathering type respectively represent Halbach magnetic poles and magnetism-gathering type magnetic poles in the prior art, and the U-shaped magnetic pole represents the composite magnetism-gathering type U-shaped permanent magnet pole in the embodiment 1-2 of the present application, and it can be seen that the axial magnetic field is strongest in the combination mode of the U-shaped magnetic poles.
As shown in fig. 9, in the case that the magnetic poles in different combination forms are made of the same amount of permanent magnet material, the torque output result obtained by two-dimensional simulation is obtained, where Halbach and the magnetic flux concentration type respectively represent Halbach magnetic poles and magnetic flux concentration type magnetic poles in the prior art, and the U-shaped magnetic pole represents the composite magnetic flux concentration type U-shaped permanent magnet pole in embodiments 1 to 2 of the present application, and it is seen that the average torque of the U-shaped magnetic pole is larger.
The technical solution of the present invention is not limited to the above-described specific embodiments, and many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments, and any technical modifications within the spirit and principle of the present invention fall within the protection scope of the present invention.

Claims (8)

1. The utility model provides a compound magnetism gathering formula permanent magnetism-superconductive coupling transmission for cryogenic pump, includes motor (1), shaft coupling (2) and cryogenic pump, the cryogenic pump includes pump case (19) and establishes at inside impeller shaft (20) and impeller (21) of pump case (19), be equipped with pump inlet (22) and pump export (23) on pump case (19), its characterized in that: the cryogenic pump also comprises an input shaft (3) and a permanent magnet rotor yoke iron (4) which are arranged outside a pump shell (19) at the drive end of the cryogenic pump, and a superconducting rotor yoke iron (14) and an output shaft (16) which are arranged inside the pump shell (19) at the drive end of the cryogenic pump; the motor (1) is connected with an input shaft (3) of the cryogenic pump through a coupler (2), the input shaft (3) is coaxially and fixedly connected with a permanent magnet rotor yoke (4), a plurality of U-shaped grooves (6) are formed in the inner side of the permanent magnet rotor yoke (4) along the circumferential direction, composite magnetism-gathering U-shaped permanent magnet poles (7) are arranged in the U-shaped grooves (6) in a matched mode, and magnetic conductive iron sheets (5) are arranged in the middles of the composite magnetism-gathering U-shaped permanent magnet poles (7); one side of the superconducting rotor yoke (14) close to the permanent magnet rotor yoke (4) is provided with a circle of fan-shaped superconducting sheets (15) at intervals, the composite magnetic gathering U-shaped permanent magnet poles (7) are correspondingly connected with the superconducting sheets (15) in a non-contact mode, a working air gap (13) is reserved between the composite magnetic gathering U-shaped permanent magnet poles (7) and the superconducting sheets (15), one end, facing the working air gap (13), of an output shaft (16) is coaxially and fixedly connected with a suspension component (18), the middle of the superconducting rotor yoke (14) is rotatably connected with the suspension component (18) through a radial magnetic suspension bearing (17), and the outer side of the superconducting rotor yoke (14) is fixedly connected with the output shaft (16).
2. The compound magnetism-gathering permanent magnet-superconducting coupling transmission device for the cryogenic pump according to claim 1, wherein: the composite magnetism-gathering U-shaped permanent magnet pole (7) is formed by sequentially and closely laminating and splicing a first permanent magnet (8), a second permanent magnet (9), a third permanent magnet (10), a fourth permanent magnet (11) and a fifth permanent magnet (12) according to a U shape, wherein the cross sections of the second permanent magnet (9) and the fourth permanent magnet (11) are fan-shaped, and the magnetizing directions of the permanent magnets point to the magnetic conductive iron sheet (5).
3. The compound magnetism-gathering permanent magnet-superconducting coupling transmission device for the cryogenic pump according to claim 1, wherein: the composite magnetism-gathering U-shaped permanent magnet pole (7) is formed by sequentially and tightly attaching and splicing a sixth permanent magnet (24), a seventh permanent magnet (25) and an eighth permanent magnet (26) in a U-shaped manner, wherein the cross section of the seventh permanent magnet (25) is semicircular, and the magnetizing directions of the permanent magnets point to the magnetic conductive iron sheet (5).
4. The compound magnetism-gathering permanent magnet-superconducting coupling transmission device for the cryogenic pump according to claim 1, wherein: the composite magnetism-gathering U-shaped permanent magnet pole (7) and the permanent magnet rotor yoke (4) are fixedly arranged in the U-shaped groove (6).
5. The compound magnetism-gathering permanent magnet-superconducting coupling transmission device for the cryogenic pump according to claim 1, wherein: the radial magnetic suspension bearing (17) comprises an inner ring and an outer ring which are coaxially sleeved, the inner ring is a superconducting stator (17-1), the outer ring is a permanent magnet rotor (17-2), and a suspension gap is reserved between the inner ring and the outer ring.
6. The compound magnetism-gathering permanent magnet-superconducting coupling transmission device for the cryogenic pump according to claim 1, wherein: the superconducting sheet (15) is fixedly arranged on the superconducting rotor yoke (14).
7. The compound magnetism-gathering permanent magnet-superconducting coupling transmission device for the cryogenic pump according to claim 1, wherein: the composite magnetism-gathering U-shaped permanent magnet poles (7) and the superconducting sheets (15) are arranged at equal intervals or unequal intervals.
8. The compound magnetism-gathering permanent magnet-superconducting coupling transmission device for the cryogenic pump according to claim 1, wherein: the superconducting sheets (15) are made of superconducting bulk materials or stacked superconducting strips.
CN202210468193.8A 2022-04-29 2022-04-29 Composite magnetism-gathering permanent magnet-superconducting coupling transmission device for low-temperature pump Pending CN114710004A (en)

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CN202210468193.8A CN114710004A (en) 2022-04-29 2022-04-29 Composite magnetism-gathering permanent magnet-superconducting coupling transmission device for low-temperature pump

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Application Number Priority Date Filing Date Title
CN202210468193.8A CN114710004A (en) 2022-04-29 2022-04-29 Composite magnetism-gathering permanent magnet-superconducting coupling transmission device for low-temperature pump

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CN114710004A true CN114710004A (en) 2022-07-05

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115940571A (en) * 2023-02-20 2023-04-07 北京瑶光高科科技有限公司 Column type arc electromagnetic pump for pushing liquid metal

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115940571A (en) * 2023-02-20 2023-04-07 北京瑶光高科科技有限公司 Column type arc electromagnetic pump for pushing liquid metal

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