CN101368595A - Permanent-magnet bearing structure with high axial bearing capacity - Google Patents
Permanent-magnet bearing structure with high axial bearing capacity Download PDFInfo
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- CN101368595A CN101368595A CNA2008101561578A CN200810156157A CN101368595A CN 101368595 A CN101368595 A CN 101368595A CN A2008101561578 A CNA2008101561578 A CN A2008101561578A CN 200810156157 A CN200810156157 A CN 200810156157A CN 101368595 A CN101368595 A CN 101368595A
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Abstract
Disclosed is a permanent magnetic bearing structure with large bearing capacity, which comprises a bearing stator and a bearing rotor (5); the bearing stator is composed of a flexible magnetic ring (1), a positioning ring (2), an external permanent magnetic ring (3) and an internal permanent magnetic ring (4); in the bearing stator, the external permanent magnetic ring (3) is arranged on the external circumference of the positioning ring (2); the internal permanent magnetic ring (4) is arranged on the internal circumference of the positioning ring (2); the flexible magnetic ring (1) is arranged on the upper part of the positioning ring (2); the external circle of the flexible magnetic ring (1) is equal to the external circle of the external permanent magnetic ring (3); the internal circle of the flexible magnetic ring (1) is equal to the internal circle of the internal permanent magnetic ring (4); an axial gap is formed between the bearing stator and the bearing rotor (5) which are in the same axial line; both the internal permanent magnetic ring and the external permanent magnetic ring are magnetized in the axial direction; the magnetic poles of the internal permanent magnetic ring and the external permanent magnetic ring are arranged oppositely to form a closed magnetic path. Based on the novel permanent magnetic bearing structure, the magnetic leakage of the magnetic path and the magnetic resistance of the magnetic path are reduced. Compared with the traditional permanent magnetic structure with the same material and volume, the axial suction between the bearing stator and the rotor is greater.
Description
Technical field
The present invention relates to a kind of axial carrying Permanent-magnet bearing that is used for accumulated energy flywheel, this type of Permanent-magnet bearing also can be used for mechanisms such as machinery instrument.The technical field that belongs to magnetic suspension bearing.
Background technique
Magnetic bearing is a class bearing that utilizes magnetic force that rotating shaft is suspended.Suspended patterns such as super-conductive magnetic suspension, electromagnetic suspension, permanent magnet suspension are arranged at present, also have plenty of two kinds combination.Because advantages such as high rotating speed, nothing machinery wearing and tearing, reliability height, dynamic characteristic are adjustable, magnetic suspension bearing is highly suitable in the mechanisms such as flywheel energy storage system and machinery instrument.The efficient of super-conductive magnetic suspension bearing is very high, but technical requirements and cost height; Electromagnetic suspension needs exciting curent, consumes electric power, and efficient is compared low, and the active magnetic bearing system volume more also limits its application; With respect to super-conductive magnetic suspension and electromagnetic suspension, Permanent-magnet bearing has advantages such as compact structure is simple, volume is little, no power consumption, obtains more and more using in accumulated energy flywheel, for flywheel provides axial unloading, Permanent-magnet bearing also has certain radial rigidity, guarantees stability radially.
The development trend of accumulated energy flywheel is a big energy storage capacity, high-power at present, it is big that the volume of flywheel and quality become thereupon, think that flywheel provides the Permanent-magnet bearing of axial unloading to require big bearing capacity, and the fly wheel system inner volume is limited, then improves the axial carrying capacity of Permanent-magnet bearing in limited bulk highly significant.
Summary of the invention
Technical problem:, the invention provides a kind of big axially Permanent-magnet bearing of bearing capacity at the axial carrying capacity deficiency of traditional dicyclo Permanent-magnet bearing.Most magnetic lines of force reduce magnetic circuit magnetic leakage and magnetic resistance effectively through the axial air-gap between bearing stator and bearing rotor in this Permanent-magnet bearing structure magnetic circuit, have strengthened axial air-gap magnetic induction intensity.Make bearing stator be able to bigger raising to the axial attraction force of rotor.
Technological scheme: the Permanent-magnet bearing structure that the present invention has big bearing capacity comprises bearing stator and bearing rotor, and bearing stator is made up of soft magnetism ring, positioning ring, outer permanent-magnetic clamp and interior permanent-magnetic clamp; In bearing stator, outer permanent-magnetic clamp is set on the excircle of positioning ring, interior permanent-magnetic clamp is set on the inner circumference of positioning ring, on the top of positioning ring the soft magnetism ring is set, the cylindrical of soft magnetism ring equates with the cylindrical of outer permanent-magnetic clamp, the interior circle of soft magnetism ring equates with the interior circle of interior permanent-magnetic clamp, between bearing stator and the bearing rotor axial air-gap is arranged, the two is positioned on same the axis, and inside and outside permanent-magnetic clamp all adopts axial charging, for forming closed magnetic path, inside and outside permanent-magnetic clamp magnetic pole is oppositely placed.
Axial air gap can regulate between bearing stator and bearing rotor.
Beneficial effect:, reduced the magnetic circuit magnetic leakage effectively and reduced the magnetic circuit magnetic resistance by this kind novel permanent magnetic bearing structure.Bigger with the axial suction of comparing between bearing stator and rotor with traditional Permanent-magnet bearing structure of volume with material.Can be used for the axial unloading of big energy storage, powerful accumulated energy flywheel, also can promote the microminiaturization of machinery instrument.Novel permanent magnetic bearing with φ 30 * φ 84 * 12 is an example, and axial air-gap is within 8mm, and axially suction is with respect on average having improved 45.8% with volume with traditional Permanent-magnet bearing of material.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 be the Permanent-magnet bearing (abbreviation new structure) of big axially bearing capacity of the present invention with volume monocycle Permanent-magnet bearing (abbreviation conventional construction) bearing capacity comparison diagram.
Comprise among the figure: bearing stator, bearing rotor, bearing stator is combined by soft magnetism ring 1, positioning ring 2, outer permanent-magnetic clamp 3 and interior permanent-magnetic clamp 4.Arrow is represented the direction of magnetization among the figure.
Embodiment
This Permanent-magnet bearing is made up of bearing stator, bearing rotor, and bearing stator is by a soft magnetism ring, a positioning ring and two permanent-magnetic clamp combinations, and permanent-magnetic clamp is axial magnetized, and the inside and outside permanent-magnetic clamp direction of magnetization is opposite.The permanent-magnetic clamp material is the Nd-Fe-B series permanent magnetic material, and this material has bigger coercivity and remanence strength; The soft magnetism ring material adopts magnetic property 40Cr (quenching with Subsequent tempering) preferably; Positioning ring is selected non-magnetic duralumin material for use.
Bearing stator and bearing rotor form closed magnetic circuit, and the active force between the two is axial suction.By the suction between bearing stator and bearing rotor flywheel rotor is suspended, thereby realize axially unloading.The axial force of Permanent-magnet bearing and the size of radial rigidity can be regulated by adjusting axial air-gap.When axially displacement reduced between two magnet rings, axially suction and radial rigidity all increased; Otherwise axial force and radial rigidity all reduce.
As shown in drawings, among the present invention there be the critical piece of composition bearing stator:
The material of soft magnetism ring 1 adopts quenching with Subsequent tempering 40Cr;
The material of positioning ring 2 adopts non-magnet_conductible material duralumin (trade mark is 2A13);
Outer permanent-magnetic clamp 3 all is that Nd-Fe-B is a sintered permanent magnet with the material of interior permanent-magnetic clamp 4, and material trademark is N40, and this permanent-magnetic clamp can be customized in the magnetic product producer of specialty;
Bearing rotor 5 and flywheel rotor one, material is quenching with Subsequent tempering 40Cr;
The direction of magnetization of inside and outside permanent-magnetic clamp is opposite in the bearing stator structure, between bearing stator and bearing rotor axial air-gap is arranged, and the axial suction of Permanent-magnet bearing and the big I of radial rigidity are regulated by changing axial air-gap.
In bearing stator, outer permanent-magnetic clamp 3 is set on the excircle of positioning ring 2, permanent-magnetic clamp 4 in being provided with on the inner circumference of positioning ring 2 is provided with soft magnetism ring 1 on the top of positioning ring 2, and the cylindrical of soft magnetism ring 1 equates with the cylindrical of outer permanent-magnetic clamp 3, the interior circle of soft magnetism ring 1 equates with the interior circle of interior permanent-magnetic clamp 4, between bearing stator and the bearing rotor 5 axial air-gap is arranged, the two is positioned on same the axis, and inside and outside permanent-magnetic clamp all adopts axial charging, for forming closed magnetic path, inside and outside permanent-magnetic clamp magnetic pole is oppositely placed.5 axial air gap can regulate of bearing stator and bearing rotor.
Claims (2)
1. the Permanent-magnet bearing structure with big bearing capacity is characterized in that this structure comprises bearing stator and bearing rotor (5), and bearing stator is made up of soft magnetism ring (1), positioning ring (2), outer permanent-magnetic clamp (3) and interior permanent-magnetic clamp (4); In bearing stator, outer permanent-magnetic clamp (3) is set on the excircle of positioning ring (2), interior permanent-magnetic clamp (4) is set on the inner circumference of positioning ring (2), on the top of positioning ring (2) soft magnetism ring (1) is set, the cylindrical of soft magnetism ring (1) equates with the cylindrical of outer permanent-magnetic clamp (3), the interior circle of soft magnetism ring (1) equates with the interior circle of interior permanent-magnetic clamp (4), bearing stator and bearing rotor have axial air-gap between (5), the two is positioned on same the axis, inside and outside permanent-magnetic clamp all adopts axial charging, for forming closed magnetic path, inside and outside permanent-magnetic clamp magnetic pole is oppositely placed.
2. the Permanent-magnet bearing structure with big bearing capacity according to claim 1 is characterized in that axial air gap can regulate between bearing stator and bearing rotor (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101561578A CN101368595A (en) | 2008-09-24 | 2008-09-24 | Permanent-magnet bearing structure with high axial bearing capacity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101561578A CN101368595A (en) | 2008-09-24 | 2008-09-24 | Permanent-magnet bearing structure with high axial bearing capacity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101368595A true CN101368595A (en) | 2009-02-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008101561578A Pending CN101368595A (en) | 2008-09-24 | 2008-09-24 | Permanent-magnet bearing structure with high axial bearing capacity |
Country Status (1)
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| CN (1) | CN101368595A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102003462A (en) * | 2010-12-09 | 2011-04-06 | 东南大学 | Permanent magnet bearing with large bearing capacity and damping performance |
| CN102042326A (en) * | 2010-11-10 | 2011-05-04 | 中国科学院电工研究所 | Passive magnetic bearing for low-speed flywheel energy storage system |
| CN102684365A (en) * | 2012-05-08 | 2012-09-19 | 江苏大学 | Flywheel energy storage device adopting bearingless switched reluctance motor |
| CN102723804A (en) * | 2012-06-18 | 2012-10-10 | 江苏大学 | Flywheel battery supported and driven by split magnetic levitation switch reluctance motor |
| CN104534018A (en) * | 2014-12-18 | 2015-04-22 | 东南大学 | Suspension type multilayer oil film damper with rolling spherical hinge connection |
| CN106153337A (en) * | 2016-06-22 | 2016-11-23 | 东南大学 | A kind of Permanent-magnet bearing axial carrying capacity test device |
| CN106838003A (en) * | 2017-01-18 | 2017-06-13 | 东南大学 | A kind of Permanent-magnet bearing with pendulum-type film damper |
-
2008
- 2008-09-24 CN CNA2008101561578A patent/CN101368595A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102042326A (en) * | 2010-11-10 | 2011-05-04 | 中国科学院电工研究所 | Passive magnetic bearing for low-speed flywheel energy storage system |
| CN102042326B (en) * | 2010-11-10 | 2012-07-25 | 中国科学院电工研究所 | Passive magnetic bearing for low-speed flywheel energy storage system |
| CN102003462A (en) * | 2010-12-09 | 2011-04-06 | 东南大学 | Permanent magnet bearing with large bearing capacity and damping performance |
| CN102684365A (en) * | 2012-05-08 | 2012-09-19 | 江苏大学 | Flywheel energy storage device adopting bearingless switched reluctance motor |
| CN102723804A (en) * | 2012-06-18 | 2012-10-10 | 江苏大学 | Flywheel battery supported and driven by split magnetic levitation switch reluctance motor |
| CN102723804B (en) * | 2012-06-18 | 2014-04-09 | 江苏大学 | Flywheel battery supported and driven by split magnetic levitation switch reluctance motor |
| CN104534018A (en) * | 2014-12-18 | 2015-04-22 | 东南大学 | Suspension type multilayer oil film damper with rolling spherical hinge connection |
| CN106153337A (en) * | 2016-06-22 | 2016-11-23 | 东南大学 | A kind of Permanent-magnet bearing axial carrying capacity test device |
| CN106153337B (en) * | 2016-06-22 | 2018-07-20 | 东南大学 | A kind of Permanent-magnet bearing axial carrying capacity test device |
| CN106838003A (en) * | 2017-01-18 | 2017-06-13 | 东南大学 | A kind of Permanent-magnet bearing with pendulum-type film damper |
| CN106838003B (en) * | 2017-01-18 | 2018-12-28 | 东南大学 | A kind of Permanent-magnet bearing with pendulum-type film damper |
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Open date: 20090218 |