CN103470631B - A kind of axial passive magnetic bearing of attractive combination magnet - Google Patents
A kind of axial passive magnetic bearing of attractive combination magnet Download PDFInfo
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- CN103470631B CN103470631B CN201310429806.8A CN201310429806A CN103470631B CN 103470631 B CN103470631 B CN 103470631B CN 201310429806 A CN201310429806 A CN 201310429806A CN 103470631 B CN103470631 B CN 103470631B
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- permanent magnet
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- magnet
- magnetic
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Classifications
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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
Abstract
The present invention relates to a kind of non-contact magnetically suspension bearing, particularly a kind of axial passive magnetic bearing of attractive combination magnet, can as the contactless support of rotary part in the plant equipment such as the magnetically levitated flywheel of large volume, lathe。The passive magnetic bearing of the present invention has stationary part and rotor portion, stationary part and rotor portion form magnetic air gap, wherein stationary part is made up of three stator permanent magnets, it is sintered permanent magnet, rotor portion is made up of five rotor permanent magnets, wherein it is divided into three sintered permanent magnets and two laminated permanent magnets, between them, forms combination magnet。Present invention saves the power amplifier required for axial sensor, control coil and control coil, especially, present invention employs combination magnet structure, can effectively smooth the magnetic fluctuation in air gap, and substantially reduce the high-speed eddy loss adopting piecemeal to bring owing to magnet size is big。
Description
Technical field
The present invention relates to a kind of axial passive type outer rotor magnetic bearing structure of non-contact magnetically suspension bearing, particularly a kind of attractive combination magnet, can as the contactless support of rotary part in the plant equipment such as large volume magnetically levitated flywheel, lathe。
Background technology
Magnetic suspension bearing is divided into active and passive type, active magnetic suspension bearing is the magnetic suspension bearing in magnetic field produced by superposing control coil on the basis of bias magnetic field, passive type magnetic suspension bearing is the magnetic suspension bearing of only permanent magnetic field, existing passive magnetic bearing is divided into attractive and repulsion type passive magnetic bearing, it is all the active force producing to need when stablizing that interacts utilizing stator permanent magnet and rotor permanent magnet in air gap mostly, due to when being applied to large-sized occasion, stator permanent magnet and rotor permanent magnet must splice by piecemeal, this can cause that stator permanent magnet and rotor permanent magnet can produce magnetic fluctuation in piecemeal stitching portion, thus causing that the magnetic field in air gap there is also fluctuation, deposit the defect that eddy-current loss is very big at high speeds。
Summary of the invention
The technology of the present invention solves problem: overcome the deficiencies in the prior art, it is provided that the axial passive type magnetic bearing structure of attractive combination magnet, this bearing rotary is low in energy consumption, convenient processing and manufacture, improves the reliability of system。
The technical solution of the present invention is: a kind of axial passive magnetic bearing of attractive combination magnet, it is made up of stationary part and rotor portion, stationary part is made up of the first stator permanent magnet, the second stator permanent magnet and the 3rd stator permanent magnet, be sequentially placed in axial direction is the first stator permanent magnet, the second stator permanent magnet and the 3rd stator permanent magnet, first stator permanent magnet radially magnetizes in-y direction, second stator permanent magnet magnetizes in+z direction vertically, and the 3rd stator permanent magnet radially magnetizes in+y direction；The outside of stationary part is rotor portion, rotor portion is by the first rotor permanent magnet, second rotor permanent magnet, third trochanter permanent magnet, fourth trochanter permanent magnet and the 5th rotor permanent magnet composition, the first rotor permanent magnet and the second rotor permanent magnet radially magnetize in-y direction, fourth trochanter permanent magnet and the 5th rotor permanent magnet radially magnetize in+y direction, third trochanter permanent magnet magnetizes in-z direction vertically, magnetic air gap is formed between first stator permanent magnet and the first rotor permanent magnet, magnetic air gap is formed between 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, the second rotor magnetic guiding loop between fourth trochanter permanent magnet and the 5th rotor permanent magnet, can also be placed。
The first described stator permanent magnet and the radial outside of the 3rd stator permanent magnet can also place 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, the second rotor magnetic guiding loop between fourth trochanter permanent magnet and the 5th rotor permanent magnet, can also be placed；Place the first stator magnetic guiding loop between first stator permanent magnet and the 4th stator permanent magnet, between the 3rd stator permanent magnet and the 5th stator permanent magnet, place the second stator magnetic guiding loop。
Principles of the 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 includes the steel alloy such as carbon steel, wolfram steel, AlNiCo and FeCrCo etc.；High-coercive force permanent magnetism includes 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, studies low-coercivity permanent magnetic material again almost without scholar for passive magnetic bearing。Rare earth permanent magnet has two kinds of techniques of bonding and sintering, and the former magnetic property is low, and containing a large amount of bonding agents, it is difficult to stand the harsh and unforgiving environments such as Space Thermal vacuum；The crisp large scale that is difficult to of the latter's matter shapes or processing, for large scale magnet ring, magnetic piece splicing can only shape, and piece permanent magnet seam crossing magnetic condensation wave moves under high-speed applications, can bring notable rotational loss。
The FeCrCo mechanical property of low-coercivity and machinability are more excellent, it might even be possible to band punching, be industrially widely used in the manufacture of the special-shaped permanent magnetism part of labyrinth。Owing to FeCrCo can be rolled into the band of the thinnest 0.1mm, thus utilize soft magnetism band to make the technique of lamination, FeCrCo band is made " permanent magnetism lamination ", be owing to FeCrCo band obtains through rolling on the one hand, compare bar and be easier to obtain large-sized band；On the other hand, FeCrCo lamination laminates vertically, and between sheet, glue-line can effectively suppress the axial component of piece SmCo magnet non-uniform magnetic field, significantly attenuates non-uniform magnetic field radial component, rotational loss that circumferential component produces in stacked simultaneously, achieves many things at one stroke。But owing to the actual return curve of low-coercivity permanent magnetism is misaligned with demagnetizing curve, therefore the magnetic property of its operating point is relatively low。
Combined magnet of the present invention is to adopt high-coercive force sintered rare-earth permanent magnetic (such as SmCo) as steady magnetic magnet, first along the direction of magnetization of low-coercivity lamination permanent magnetic ring (such as FeCrCo) and high-coercive force permanent magnetic ring constituent components, now, be equivalent to utilize the low-coercivity permanent magnet of the magnetic field open-circuit of High-coercivity Permanent Magnets to magnetize, the operating point of low-coercivity permanent magnetic ring is (remanent magnetism is relatively low) on its return curve, then again assembly entirety is magnetized, the operating point of such low-coercivity permanent magnetic ring is changing on its demagnetizing curve (but not on return curve, remanent magnetism becomes big), give full play to the magnetic property of material。It addition, the magnetic condensation wave produced to reduce piecemeal High-coercivity Permanent Magnets further moves, it is possible to place magnetic guiding loop between piecemeal High-coercivity Permanent Magnets and low-coercivity permanent magnetism lamination, play the effect reducing passive magnetic bearing lower eddy-current loss at a high speed further。
Present invention advantage compared with prior art is in that: compared with existing active axial magnetic suspension bearing, save the controller required for axial sensor, control coil and control coil, reduce volume, alleviate weight, eliminate loss, improve the reliability of system;Compared with existing passive type axial magnetic suspension bearing, present invention employs the combination magnet structure that laminated permanent magnet is connected with sintered permanent magnet, substantially reduce the passive magnetic bearing being made up of piecemeal permanent magnet magnetic fluctuation in magnetic air gap, and then eddy-current loss when reducing high speed。
Accompanying drawing explanation
Fig. 1 is the basic block diagram of the axial passive magnetic bearing of attractive combination magnet of the present invention。
Fig. 2 is the structure chart that the 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 structure chart that the stationary part of the present invention also has the axial passive magnetic bearing of attractive combination magnet of combination magnet。
Fig. 4 is the stator of the present invention and rotor portion is respectively provided with the structure chart of the axial passive magnetic bearing of attractive combination magnet of combination magnet and magnetic guiding loop。
Detailed description of the invention
Fig. 1 is the primitive form of the present invention, it is made up of stationary part and rotor portion, stationary part is made up of first stator permanent magnet the 11, second stator permanent magnet 12 and the 3rd stator permanent magnet 13, being sequentially placed in axial direction is the first stator permanent magnet the 11, second stator permanent magnet 12 and the 3rd stator permanent magnet 13, first stator permanent magnet 11 radially magnetizes in-y direction, second stator permanent magnet 12 magnetizes in+z direction vertically, and the 3rd stator permanent magnet 13 radially magnetizes in+y direction；The outside of stationary part is rotor portion, rotor portion is by the first rotor permanent magnet 21, 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 magnetize in-y direction, fourth trochanter permanent magnet 24 and the 5th rotor permanent magnet 25 radially magnetize in+y direction, third trochanter permanent magnet 23 magnetizes in-z direction vertically, magnetic air gap is formed between first stator permanent magnet 11 and the first rotor permanent magnet 21, magnetic air gap is formed between 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 first stator permanent magnet the 11, second stator permanent magnet the 12, the 3rd stator permanent magnet the 13, 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 primitive form basis shown in Fig. 1, the first rotor magnetic guiding loop 26 can be placed 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, place the second rotor magnetic guiding loop 27, so can reduce the second rotor permanent magnet 22 and the fourth trochanter permanent magnet 24 magnetic fluctuation between each piece of piece under large scale。
As shown in Figure 3, radial outside at the first described stator permanent magnet 11 and the 3rd stator permanent magnet 13 can also place the 4th stator permanent magnet 14 and the 5th stator permanent magnet 15, and both are laminated permanent magnet, the purpose of this way is smooth first stator permanent magnet 11 and the 3rd stator permanent magnet 13 magnetic fluctuation in piece seam。
As shown in Figure 4, it is kept to minimum to make piece permanent magnet magnetic fluctuation in air gap be kept to minimum and between each piece permanent magnet magnetic fluctuation, on the basis of structure shown in Fig. 3, magnetic guiding loop it is placed with between laminated permanent magnet and between sintered permanent magnet, specifically, the first rotor magnetic guiding loop 26 can be placed between 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, place the second rotor magnetic guiding loop 27；Between the first stator permanent magnet 11 and the 4th stator permanent magnet 14, place the first stator magnetic guiding loop 16, between the 3rd stator permanent magnet 13 and the 5th stator permanent magnet 15, place the second stator magnetic guiding loop 17。
Claims (4)
1. the axial passive magnetic bearing of attractive combination magnet, it is made up of stationary part and rotor portion, stationary part is by the first stator permanent magnet (11), second stator permanent magnet (12) and the 3rd stator permanent magnet (13) composition, being sequentially placed in axial direction is the first stator permanent magnet (11), second stator permanent magnet (12) and the 3rd stator permanent magnet (13), first stator permanent magnet (11) radially magnetizes in-y direction, second stator permanent magnet (12) magnetizes in+z direction vertically, 3rd stator permanent magnet (13) radially magnetizes in+y direction；The outside of stationary part is rotor portion, magnetic air gap is formed between first stator permanent magnet (11) and the first rotor permanent magnet (21), magnetic air gap is formed between 3rd stator permanent magnet (13) and the 5th rotor permanent magnet (25), it is characterized in that: rotor portion is by the first rotor permanent magnet (21), second rotor permanent magnet (22), third trochanter permanent magnet (23), fourth trochanter permanent magnet (24) and the 5th rotor permanent magnet (25) composition, the first rotor permanent magnet (21) and the second rotor permanent magnet (22) radially magnetize in-y direction, fourth trochanter permanent magnet (24) and the 5th rotor permanent magnet (25) radially magnetize in+y direction, third trochanter permanent magnet (23) magnetizes in-z direction vertically, 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。
2. the axial passive magnetic bearing of attractive combination magnet according to claim 1, it is characterized in that: 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), place the second rotor magnetic guiding loop (27)。
3. 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) places 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。
4. the axial passive magnetic bearing of attractive combination magnet according to claim 3, it is characterized in that: 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), place the second rotor magnetic guiding loop (27)；Place the first stator magnetic guiding loop (16) between first stator permanent magnet (11) and the 4th stator permanent magnet (14), between the 3rd stator permanent magnet (13) and the 5th stator permanent magnet (15), place the second stator magnetic guiding loop (17)。
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 |
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| CN103470631A CN103470631A (en) | 2013-12-25 |
| CN103470631B true CN103470631B (en) | 2016-06-22 |
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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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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3135933B1 (en) * | 2015-08-25 | 2019-05-01 | ReinHeart GmbH | Active magnetic bearing |
| JP6893116B2 (en) * | 2017-04-28 | 2021-06-23 | 日本電産コパル電子株式会社 | Magnetic 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 |
| CN110153971B (en) * | 2019-04-30 | 2024-01-30 | 上海隐冠半导体技术有限公司 | Workbench and magnetic levitation gravity compensation device thereof |
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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 |
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009097524A (en) * | 2007-10-12 | 2009-05-07 | Seiko Epson Corp | Magnetic bearing unit |
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Patent Citations (4)
| 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 |
| 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 |
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| CN103470631A (en) | 2013-12-25 |
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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 |