CN103470631A - Attraction type combined-magnet axial passive magnetic bearing - Google Patents
Attraction type combined-magnet axial passive magnetic bearing Download PDFInfo
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- CN103470631A CN103470631A CN2013104298068A CN201310429806A CN103470631A CN 103470631 A CN103470631 A CN 103470631A CN 2013104298068 A CN2013104298068 A CN 2013104298068A CN 201310429806 A CN201310429806 A CN 201310429806A CN 103470631 A CN103470631 A CN 103470631A
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- permanent magnet
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- magnet
- magnetic
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- 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
- F16C32/041—Passive magnetic bearings with permanent magnets on one part attracting the other part
- F16C32/0417—Passive magnetic bearings with permanent magnets on one part attracting the other part for axial load mainly
- F16C32/0419—Passive magnetic bearings with permanent magnets on one part attracting the other part for axial load mainly with facing radial projections
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
- Physical Vapour Deposition (AREA)
Abstract
The invention relates to a non-contact magnetic suspension bearing and particularly relates to an attraction type combined-magnet axial passive magnetic bearing which can serve as a non-contact support of a rotating component in mechanical equipment, such as a large-size magnetic suspension flywheel, a machine tool and the like. The passive magnetic bearing disclosed by the invention is provided with a stator portion and a rotor portion, wherein a magnetic air gap is formed by the stator portion and the rotor portion, the stator portion consists of three stator permanent magnets which are all sintered permanent magnets, the rotor portion consists of five rotor permanent magnets including three sintered permanent magnets and two layered permanent magnets, and a combined magnet is formed by the stator permanent magnets and the rotor permanent magnets. The passive magnetic bearing has the advantages that an axial sensor, a control coil and a power amplifying circuit required by the control coil are omitted; particularly, a combined magnet structure is adopted, so that magnetic field fluctuation in the air gap can be smoothed effectively, and the loss of high-speed eddy caused by the adoption of sub-blocks due to the large size of a magnet is reduced greatly.
Description
Technical field
The present invention relates to a kind of non-contact magnetically suspension bearing, particularly the axial passive type external rotor of a kind of attractive combination magnet magnetic bearing structure, can be used as the contactless support of rotary component in the machinery such as large volume magnetically levitated flywheel, lathe.
Background technique
Magnetic suspension bearing is divided into active and passive type, active magnetic suspension bearing is the magnetic suspension bearing that the superposing control coil produces on the basis of bias magnetic field magnetic field forms, the passive type magnetic suspension bearing is the magnetic suspension bearing that only has permanent magnetic field to form, existing passive magnetic bearing is divided into attractive and repulsion type passive magnetic bearing, all to utilize the interaction in air gap of stator permanent magnet and rotor permanent magnet to produce the active force needed while stablizing mostly, due to when being applied to large-sized occasion, stator permanent magnet and rotor permanent magnet must be spliced by piecemeal, this can cause stator permanent magnet and rotor permanent magnet can produce magnetic fluctuation in piecemeal splicing place, thereby cause the magnetic field in air gap also to have fluctuation, there is the at a high speed lower very large defect of eddy current loss.
Summary of the invention
Technology of the present invention is dealt with problems and is: overcome the deficiencies in the prior art, provide attractive combination magnet axial passive type magnetic bearing structure, this bearing rotary is low in energy consumption, convenient processing and manufacture, has improved the reliability of system.
Technical solution of the present invention is: the axial passive magnetic bearing of a kind of attractive combination magnet, by stationary part and rotor portion, formed, stationary part is comprised of the first stator permanent magnet, the second stator permanent magnet and the 3rd stator permanent magnet, in axial direction go up and be placed as successively the first stator permanent magnet, the second stator permanent magnet and the 3rd stator permanent magnet, the first stator permanent magnet radially-the y direction magnetizes, the second stator permanent magnet vertically+the z direction magnetizes, the 3rd stator permanent magnet radially+the y direction magnetizes, the outside of stationary part is rotor portion, rotor portion is by the first rotor permanent magnet, the second rotor permanent magnet, the third trochanter permanent magnet, fourth trochanter permanent magnet and the 5th rotor permanent magnet form, the first rotor permanent magnet and the second rotor permanent magnet radially-the y direction magnetizes, fourth trochanter permanent magnet and the 5th rotor permanent magnet radially+the y direction magnetizes, the third trochanter permanent magnet vertically-the z direction magnetizes, form magnetic air gap between the first stator permanent magnet and the first rotor permanent magnet, form magnetic air gap between the 3rd stator permanent magnet and the 5th rotor permanent magnet, wherein the first rotor permanent magnet and the 5th rotor permanent magnet are laminated permanent magnet, all the other permanent magnets are sintered permanent magnet,
Described the first rotor permanent magnet and the 5th rotor permanent magnet are laminated aluminum nickel cobalt AlNiCo permanent magnet or lamination siderochrome cobalt FeCrCo permanent magnet.
Described the first stator permanent magnet, the second stator permanent magnet, the 3rd stator permanent magnet, the second rotor permanent magnet, third trochanter permanent magnet and fourth trochanter permanent magnet are sintered samarium cobalt SmCo permanent magnet.
The first rotor magnetic guiding loop can also be placed between described the first rotor permanent magnet and the second rotor permanent magnet, between fourth trochanter permanent magnet and the 5th rotor permanent magnet, the second rotor magnetic guiding loop can also be placed.
The radial outside of described the first stator permanent magnet and the 3rd stator permanent magnet can also be placed the 4th stator permanent magnet and the 5th stator permanent magnet, and the 4th stator permanent magnet and the 5th stator permanent magnet are laminated permanent magnet.
The first rotor magnetic guiding loop can also be placed between described the first rotor permanent magnet and the second rotor permanent magnet, between fourth trochanter permanent magnet and the 5th rotor permanent magnet, the second rotor magnetic guiding loop can also be placed; Place the first stator magnetic guiding loop between the first stator permanent magnet and the 4th stator permanent magnet, place the second stator magnetic guiding loop between the 3rd stator permanent magnet and the 5th stator permanent magnet.
Principle of the present invention is: permanent magnet can be divided into low-coercivity permanent magnet and High-coercivity Permanent Magnets according to coercitive difference, and low-coercivity permanent magnetism comprises the alloyed steels such as carbon steel, wolfram steel, AlNiCo and FeCrCo etc.; High-coercive force permanent magnetism comprises PtCo, MnAlC, ferrite permanent-magnet and rare earth permanent magnet etc.Since the high performance rare earth permanent magnet appearance seventies, rare earth permanent magnet becomes the synonym of permanent magnetism passive magnetic bearing, does not almost have the scholar to study low-coercivity permanent magnetic material for passive magnetic bearing again.Rare earth permanent magnet has bonding and two kinds of techniques of sintering, and the former magnetic property is low, and contains a large amount of binders, is difficult to stand the harsh and unforgiving environments such as Space Thermal vacuum; The crisp large scale that is difficult to of latter's matter is shaped or processes, and for the large scale magnet ring, can only the magnetic patch splicing be shaped, and piece permanent magnet seam crossing magnetic condensation wave moves under high-speed applications, can bring remarkable rotational loss.
FeCrCo mechanical property and the workability of low-coercivity are more excellent, even can be to the band punching, in the industrial manufacture that is widely used in the special-shaped permanent magnetism part of labyrinth.Because FeCrCo can be rolled into the band of the thinnest 0.1mm, thereby utilizing the soft magnetism band to make the technique of lamination, the FeCrCo band is made " permanent magnetism lamination ", is to obtain through rolling due to the FeCrCo band on the one hand, compares bar and is easier to obtain large-sized band; On the other hand, the FeCrCo lamination laminates vertically, and between sheet, glue-line can effectively suppress the axial component of piece SmCo magnet non-uniform magnetic field, and the rotational loss that significantly weakening non-uniform magnetic field radial component, circumferential component produce in lamination simultaneously, achieve many things at one stroke.But because the actual recovery curve of low-coercivity permanent magnetism does not overlap with demagnetization curve, so the magnetic property of its operation point is lower.
Combined magnet of the present invention is to adopt high-coercive force sintered rare-earth permanent magnetic (as SmCo) as steady magnetic magnet, at first along the direction of magnetization and the high-coercive force permanent magnetic ring constituent components of low-coercivity lamination permanent magnetic ring (as FeCrCo), now, be equivalent to utilize the low-coercivity permanent magnet of the magnetic field open-circuit of High-coercivity Permanent Magnets to be magnetized, the operation point of low-coercivity permanent magnetic ring is (remanent magnetism is lower) on its recovery curve, and then assembly integral body is magnetized, the operation point of low-coercivity permanent magnetic ring will become on its demagnetization curve (but not on recovery curve like this, it is large that remanent magnetism becomes), given full play to the magnetic property of material.In addition, moving for the magnetic condensation wave that further reduces the generation of piecemeal High-coercivity Permanent Magnets, can between piecemeal High-coercivity Permanent Magnets and low-coercivity permanent magnetism lamination, place magnetic guiding loop, play and further reduce the effect that passive magnetic bearing descends at a high speed eddy current loss.
The present invention's advantage compared with prior art is: with existing active axial magnetic suspension bearing, compare; save axial sensor, control coil and the needed controller of control coil, dwindled volume, alleviated weight, eliminated loss, improved the reliability of system; With existing passive type axial magnetic suspension bearing, compare, the combination magnet structure that the present invention has adopted laminated permanent magnet to be connected with sintered permanent magnet, greatly reduced the magnetic fluctuation of passive magnetic bearing in magnetic air gap formed by the piecemeal permanent magnet, and then the eddy current loss while having reduced high speed.
The accompanying drawing explanation
The basic block diagram that Fig. 1 is the axial passive magnetic bearing of attractive combination magnet of the present invention.
Fig. 2 is the structural drawing that rotor portion of the present invention is placed with the axial passive magnetic bearing of attractive combination magnet of magnetic guiding loop.
Fig. 3 is the structural drawing that stationary part of the present invention also has the axial passive magnetic bearing of attractive combination magnet of combination magnet.
Fig. 4 is the structural drawing that stator of the present invention and rotor portion all have the axial passive magnetic bearing of attractive combination magnet of combination magnet and magnetic guiding loop.
Embodiment
Fig. 1 is citation form of the present invention, by stationary part and rotor portion, formed, stationary part is comprised of the first stator permanent magnet 11, the second stator permanent magnet 12 and the 3rd stator permanent magnet 13, in axial direction go up and be placed as successively the first stator permanent magnet 11, the second stator permanent magnet 12 and the 3rd stator permanent magnet 13, the first stator permanent magnet 11 radially-the y direction magnetizes, the second stator permanent magnet 12 vertically+the z direction magnetizes, the 3rd stator permanent magnet 13 radially+the y direction magnetizes, the outside of stationary part is rotor portion, rotor portion is by the first rotor permanent magnet 21, the second rotor permanent magnet 22, third trochanter permanent magnet 23, fourth trochanter permanent magnet 24 and the 5th rotor permanent magnet 25 form, the first rotor permanent magnet 21 and the second rotor permanent magnet 22 radially-the y direction magnetizes, fourth trochanter permanent magnet 24 and the 5th rotor permanent magnet 25 radially+the y direction magnetizes, third trochanter permanent magnet 23 vertically-the z direction magnetizes, form magnetic air gap between the first stator permanent magnet 11 and the first rotor permanent magnet 21, form magnetic air gap between the 3rd stator permanent magnet 13 and the 5th rotor permanent magnet 25, wherein the first rotor permanent magnet 21 and the 5th rotor permanent magnet 25 are laminated permanent magnet, all the other permanent magnets are sintered permanent magnet,
Described the first rotor permanent magnet 21 and the 5th rotor permanent magnet 25 are laminated aluminum nickel cobalt AlNiCo permanent magnet or lamination siderochrome cobalt FeCrCo permanent magnet.
Described the first stator permanent magnet 11, the second stator permanent magnet 12, the 3rd stator permanent magnet 13, the second rotor permanent magnet 22, third trochanter permanent magnet 23 and fourth trochanter permanent magnet 24 are sintered samarium cobalt SmCo permanent magnet.
As shown in Figure 2, on the citation form basis shown in Fig. 1, can between described the first rotor permanent magnet 21 and the second rotor permanent magnet 22, place the first rotor magnetic guiding loop 26, place the second rotor magnetic guiding loop 27 between fourth trochanter permanent magnet 24 and the 5th rotor permanent magnet 25, can reduce like this second rotor permanent magnet 22 and the magnetic fluctuation of fourth trochanter permanent magnet 24 between each piece of piece under large scale.
As shown in Figure 3, can also place the 4th stator permanent magnet 14 and the 5th stator permanent magnet 15 at the radial outside of described the first stator permanent magnet 11 and the 3rd stator permanent magnet 13, and both are laminated permanent magnet, the purpose of this way is level and smooth the first stator permanent magnet 11 and the magnetic fluctuation of the 3rd stator permanent magnet 13 in the piece seam.
As shown in Figure 4, in order to make the magnetic fluctuation of piece permanent magnet in air gap be kept to minimum and the magnetic fluctuation between each piece permanent magnet is kept to minimum, on the basis of structure shown in Fig. 3, be placed with magnetic guiding loop between laminated permanent magnet and between sintered permanent magnet, specifically, can place the first rotor magnetic guiding loop 26 between the first rotor permanent magnet 21 and the second rotor permanent magnet 22, place the second rotor magnetic guiding loop 27 between fourth trochanter permanent magnet 24 and the 5th rotor permanent magnet 25; Place the first stator magnetic guiding loop 16 between the first stator permanent magnet 11 and the 4th stator permanent magnet 14, place the second stator magnetic guiding loop 17 between the 3rd stator permanent magnet 13 and the 5th stator permanent magnet 15.
Claims (6)
1. the axial passive magnetic bearing of attractive combination magnet, it is characterized in that: by stationary part and rotor portion, formed, stationary part is by the first stator permanent magnet (11), the second stator permanent magnet (12) and the 3rd stator permanent magnet (13) form, in axial direction go up and be placed as successively the first stator permanent magnet (11), the second stator permanent magnet (12) and the 3rd stator permanent magnet (13), the first stator permanent magnet (11) radially-the y direction magnetizes, the second stator permanent magnet (12) vertically+the z direction magnetizes, the 3rd stator permanent magnet (13) radially+the y direction magnetizes, the outside of stationary part is rotor portion, rotor portion is by the first rotor permanent magnet (21), the second rotor permanent magnet (22), third trochanter permanent magnet (23), fourth trochanter permanent magnet (24) and the 5th rotor permanent magnet (25) form, the first rotor permanent magnet (21) and the second rotor permanent magnet (22) radially-the y direction magnetizes, fourth trochanter permanent magnet (24) and the 5th rotor permanent magnet (25) radially+the y direction magnetizes, third trochanter permanent magnet (23) vertically-the z direction magnetizes, form magnetic air gap between the first stator permanent magnet (11) and the first rotor permanent magnet (21), form magnetic air gap between the 3rd stator permanent magnet (13) and the 5th rotor permanent magnet (25), wherein the first rotor permanent magnet (21) and the 5th rotor permanent magnet (25) are laminated permanent magnet, all the other permanent magnets are sintered permanent magnet.
2. the axial passive magnetic bearing of attractive combination magnet according to claim 1, it is characterized in that: described the first rotor permanent magnet (21) and the 5th rotor permanent magnet (25) are laminated aluminum nickel cobalt AlNiCo permanent magnet or lamination siderochrome cobalt FeCrCo permanent magnet.
3. the axial passive magnetic bearing of attractive combination magnet according to claim 1, it is characterized in that: described the first stator permanent magnet (11), the second stator permanent magnet (12), the 3rd stator permanent magnet (13), the second rotor permanent magnet (22), third trochanter permanent magnet (23) and fourth trochanter permanent magnet (24) are sintered samarium cobalt SmCo permanent magnet.
4. the axial passive magnetic bearing of attractive combination magnet according to claim 1, it is characterized in that: can also place the first rotor magnetic guiding loop (26) between described the first rotor permanent magnet (21) and the second rotor permanent magnet (22), between fourth trochanter permanent magnet (24) and the 5th rotor permanent magnet (25), can also place the second rotor magnetic guiding loop (27).
5. the axial passive magnetic bearing of attractive combination magnet according to claim 1, it is characterized in that: the radial outside of described the first stator permanent magnet (11) and the 3rd stator permanent magnet (13) can also be placed the 4th stator permanent magnet (14) and the 5th stator permanent magnet (15), and the 4th stator permanent magnet (14) and the 5th stator permanent magnet (15) are laminated permanent magnet.
6. the axial passive magnetic bearing of attractive combination magnet according to claim 5, it is characterized in that: can also place the first rotor magnetic guiding loop (26) between described the first rotor permanent magnet (21) and the second rotor permanent magnet (22), between fourth trochanter permanent magnet (24) and the 5th rotor permanent magnet (25), can also place the second rotor magnetic guiding loop (27); Place the first stator magnetic guiding loop (16) between the first stator permanent magnet (11) and the 4th stator permanent magnet (14), place the second stator magnetic guiding loop (17) between the 3rd stator permanent magnet (13) and the 5th stator permanent magnet (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310429806.8A CN103470631B (en) | 2013-09-18 | 2013-09-18 | A kind of axial passive magnetic bearing of attractive combination magnet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310429806.8A CN103470631B (en) | 2013-09-18 | 2013-09-18 | A kind of axial passive magnetic bearing of attractive combination magnet |
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| Publication Number | Publication Date |
|---|---|
| CN103470631A true CN103470631A (en) | 2013-12-25 |
| CN103470631B CN103470631B (en) | 2016-06-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310429806.8A Active CN103470631B (en) | 2013-09-18 | 2013-09-18 | A kind of axial passive magnetic bearing of attractive combination magnet |
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| Country | Link |
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| CN (1) | CN103470631B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108026967A (en) * | 2015-08-25 | 2018-05-11 | 兰英之心有限公司 | Active magnetic bearings |
| CN108644228A (en) * | 2018-05-22 | 2018-10-12 | 北京航空航天大学 | A kind of small volume low watt consumption axial magnetic suspension bearing |
| WO2018198481A1 (en) * | 2017-04-28 | 2018-11-01 | 日本電産コパル電子株式会社 | Magnetic bearing |
| EP3965285A4 (en) * | 2019-04-30 | 2023-05-31 | Yinguan Semiconductor Technology Co., Ltd. | Magnetic levitation gravity compensation device |
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| CN1995768A (en) * | 2007-01-05 | 2007-07-11 | 北京航空航天大学 | PM offset external rotor radial magnetic bearing with redundant structure |
| JP2009097524A (en) * | 2007-10-12 | 2009-05-07 | Seiko Epson Corp | Magnetic bearing unit |
| CN102003462A (en) * | 2010-12-09 | 2011-04-06 | 东南大学 | Permanent magnet bearing with large bearing capacity and damping performance |
| CN201818659U (en) * | 2010-09-29 | 2011-05-04 | 西南交通大学 | High-temperature superconduction magnetic suspension radial bearing |
| CN201818660U (en) * | 2010-09-29 | 2011-05-04 | 西南交通大学 | Permanent magnet radial bearing |
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2013
- 2013-09-18 CN CN201310429806.8A patent/CN103470631B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1995768A (en) * | 2007-01-05 | 2007-07-11 | 北京航空航天大学 | PM offset external rotor radial magnetic bearing with redundant structure |
| JP2009097524A (en) * | 2007-10-12 | 2009-05-07 | Seiko Epson Corp | Magnetic bearing unit |
| CN201818659U (en) * | 2010-09-29 | 2011-05-04 | 西南交通大学 | High-temperature superconduction magnetic suspension radial bearing |
| CN201818660U (en) * | 2010-09-29 | 2011-05-04 | 西南交通大学 | Permanent magnet radial bearing |
| CN102003462A (en) * | 2010-12-09 | 2011-04-06 | 东南大学 | Permanent magnet bearing with large bearing capacity and damping performance |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108026967A (en) * | 2015-08-25 | 2018-05-11 | 兰英之心有限公司 | Active magnetic bearings |
| WO2018198481A1 (en) * | 2017-04-28 | 2018-11-01 | 日本電産コパル電子株式会社 | Magnetic bearing |
| JP2018189105A (en) * | 2017-04-28 | 2018-11-29 | 日本電産コパル電子株式会社 | Magnetic bearing |
| US11118625B2 (en) | 2017-04-28 | 2021-09-14 | Nidec Copal Electronics Corporation | Magnetic bearing |
| CN108644228A (en) * | 2018-05-22 | 2018-10-12 | 北京航空航天大学 | A kind of small volume low watt consumption axial magnetic suspension bearing |
| CN108644228B (en) * | 2018-05-22 | 2019-08-16 | 北京航空航天大学 | A kind of small volume low watt consumption axial magnetic suspension bearing |
| EP3965285A4 (en) * | 2019-04-30 | 2023-05-31 | Yinguan Semiconductor Technology Co., Ltd. | Magnetic levitation gravity compensation device |
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| Publication number | Publication date |
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| CN103470631B (en) | 2016-06-22 |
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Effective date of registration: 20200924 Address after: 5-02, 5 / F, building 5, No. 10 yard, Jiachuang Road, Tongzhou District, Beijing Patentee after: Huachi kinetic energy (Beijing) Technology Co.,Ltd. Address before: 100191 Haidian District, Xueyuan Road, No. 37, Patentee before: BEIHANG University |