CN101832335B - Permanent magnet biased axial-radial magnetic bearing - Google Patents
Permanent magnet biased axial-radial magnetic bearing Download PDFInfo
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- CN101832335B CN101832335B CN2010101822359A CN201010182235A CN101832335B CN 101832335 B CN101832335 B CN 101832335B CN 2010101822359 A CN2010101822359 A CN 2010101822359A CN 201010182235 A CN201010182235 A CN 201010182235A CN 101832335 B CN101832335 B CN 101832335B
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Abstract
The invention discloses a permanent magnet biased axial-radial magnetic bearing belonging to the technical field of magnetic bearings. A stator assembly comprises an axial stator, a radial stator, an annular permanent magnet, an axial control winding and a radial control winding, wherein the axial control winding is arranged on the pole of one end of the axial stator, the inner end face of the other end of the axial stator contacts the annular permanent magnet, the radial control wining is arranged on the pole of the radial stator, and the annular permanent magnet is attached to the external end of the radial stator; a rotor assembly comprises a first rotor core, a rotating shaft and a second rotor core, wherein the first rotor core and the second rotor core are respectively sleeved to the rotating shaft, the first rotor core is connected with the second rotor core, and the first rotor core and the second rotor core are arranged inside the axial stator and the radial stator. The invention simplifies the structure of a bearing, has convenient installation, less power consumption and small axial length.
Description
Technical field
What the present invention relates to is a kind of hybrid magnetic bearing of magnetic bearing technical field, in particular a kind of permanent-magnetic biased axial radial magnetic bearing.
Background technique
Magnetic suspension bearing abbreviates magnetic bearing again as, is to utilize the magnetic force between stator and the rotor that rotor is suspended in the space, makes a kind of novel high-performance bearing that does not have Mechanical Contact between stator and the rotor.Owing to do not have contact mechanically between the stator and rotor; So the rotor of magnetic suspension bearing can reach very high running rotating speed; And have advantages such as mechanical wear is little, energy consumption is low, the life-span is long, unlubricated, pollution-free, be particularly suitable for special applications such as high speed, vacuum and ultra cleaning.
At present; The mode that magnetic bearing provides according to magnetic force is divided into following several kinds: first kind is active magnetic bearings; There is bias current in this magnetic bearing coil, so that bias magnetic field to be provided, superposes with the biasing magnetic flux by the control electric current control magnetic flux that the control winding produces of flowing through; Thereby produce controlled suspending power, volume, weight and power consumption are all bigger.Second kind is passive magnetic bearing; The suspending power of this magnetic bearing is provided by permanent magnet fully, and its required controller is simple, and the suspension power consumption is little; But rigidity and damping are all less, only generally apply in one direction supporting object or alleviate the load that acts on the traditional bearing.The third is a hybrid magnetic bearing; The electromagnet that this magnetic bearing adopts permanent-magnet material to substitute in the active magnetic bearings produces bias magnetic field, and the just balanced load that electromagnet provides or the controlling magnetic field of interference greatly reduce the power loss that produces because of bias current; The required Number of ampere turns of electromagnet is the half the of active magnetic bearings; Dwindle the volume of magnetic bearing, alleviated its weight, and improved bearing capacity.
Literature search through to existing technology is found: Chinese invention patent application number: 200810236276.4; Title: a kind of Heteropolarity permanent magnetism bias axial and radial magnetic bearings; The radial stator of this magnetic bearing is eight field structures of symmetric arrangement; Be respectively 4 control magnetic poles that are set with the control winding, 4 permanent-magnets that embed flaky permanent magnet place between the control magnetic pole.This technological permanent-magnetic biased axial radial magnetic bearing is a kind of hybrid magnetic bearing of different pole, and promptly magnetic pole of the stator is that N, S alternately arrange, and rotor core can produce bigger magnetic hysteresis and eddy current loss when high speed operation.
The permanent-magnetic biased axial radial magnetic bearing structural type of research is divided into two kinds in the world at present; A kind of is that radial direction magnetic bearing and axial magnetic bearing are separated; Utilize same permanent magnet that radial and axial biasing magnetic flux is provided, this construction rotor axial length is long, and rotor critical speed is low; Another kind is with axially and radially integrating, compact structure, volume is little, the rotor dynamic performance improves greatly, has reduced the bearing cost, but its design, install relatively complicated, especially higher to axial installation requirement.
Summary of the invention
Goal of the invention: the objective of the invention is to overcome the deficiency of existing technology, a kind of permanent-magnetic biased axial radial magnetic bearing is provided, simple in structure, be easy to control, be convenient to processing, and solved the problem of axial installation well.
Technological scheme: the present invention realizes through following technological scheme, the present invention includes stator module and rotor assembly, and wherein: stator module is located at the periphery of rotor assembly.
Described stator module comprises axial stator, radial stator, annular permanent magnet, axially controls winding and radially control winding; Wherein: axially control winding and be located on the magnetic pole of an end of axial stator; The interior edge face and the annular permanent magnet of the other end of axial stator contact; Radially control winding and be located on the magnetic pole of radial stator, annular permanent magnet is attached at the outer end of radial stator.
Described rotor assembly comprises the first rotor iron core, rotating shaft and second rotor core; Wherein: the first rotor iron core and second rotor core are socketed in the rotating shaft respectively; The first rotor iron core is located at axial pole inside; The first rotor is unshakable in one's determination to link to each other with second rotor core, and the inside of radial stator is located in second rotor core.
For ease of axially controlling the layout of winding, the magnetic pole of described axial stator is provided with the magnetic groove.
In order to produce the biasing magnetic flux of axial component, described the first rotor iron core is provided with projection near an end of axial control winding, and the width of described projection is provided with the width of the magnetic pole of axial control winding less than axial stator.
Described radial stator is the structure of two pairs of magnetic poles of four teeth, and the radially control windings in series on two relative teeth connects.
Axial working principle of the present invention is: the magnet pole widths of axial stator is greater than the first rotor width unshakable in one's determination; When the bias magnetic that the annular permanent magnet of radial magnetizing produces was stimulated the menstrual flow axial stator, radial air gap arrival rotor core; Produced biasing magnetic flux with axial component; When rotor core was positioned at the longitudinal balance position, because the symmetry properties of structure, the right ends face magnetic circuit of rotor core equated; Equate at the right side air gap of the axial end of rotor core and the magnetic flux at left side air gap place that then this moment, left and right sides suction equated.If rotor core at this moment receives the outer power of disturbing left, will depart from the equilibrium position to left movement, the flux change about causing that the annular permanent-magnet body produces, promptly the magnetic circuit on the right side increases, and magnetic flux reduces, and promptly the axial magnetic flux component reduces; The magnetic circuit on the left side contracts, and magnetic flux increases, and promptly the axial magnetic flux component increases.Because square being directly proportional of magnetic field suction and magnetic flux, therefore the suction on the right is less than the suction on the left side, add control magnetic flux before, rotor core can't be got back to the equilibrium position.This moment, displacement transducer detected the displacement amount that rotor departs from its reference position; Controller is transformed into control signal with this displacement signal, and power amplifier is transformed into the control electric current with this control signal again, and this electric current is flowed through and axially controlled winding; Produce an electromagnetism magnetic flux at the end face air gap; The permanent magnet flux axial component stack at this electromagnetism magnetic flux and end face air gap place increases the magnetic flux at the air gap place, right side of rotor core, and the magnetic flux at left side air gap place reduces; Produce a suction to the right, rotor core is retracted the equilibrium position.In like manner, rotor core receives axial outer disturbance left, can make rotor core be returned to the equilibrium position equally.
Radially working principle of the present invention is: when rotor core was positioned at the intermediate equilibria position, because the symmetry properties of structure, the magnetic flux that annular permanent magnet produces equated that at the right side of rotor core air gap and the left side air gap place this moment, left and right sides suction equated.If rotor core at this moment receives the outer power of disturbing left, rotor core will depart from the equilibrium position to left movement, causes the flux change of the left and right sides air gap of annular permanent magnet generation, and promptly the air gap on the right side increases, and magnetic flux reduces; The air gap on the left side reduces, and magnetic flux increases.Rely on the reluctance force of annular permanent magnet can not make rotor be returned to the equilibrium position; Need to produce the permanent magnet flux stack in control magnetic flux and the air gap through radially controlling winding; Magnetic flux in the air gap of the rotor core right side is increased; Magnetic flux in the air gap of the left side reduces, and produces a suction to the right, and rotor core is retracted the equilibrium position.In like manner, no matter rotor core receives left, to the right, outer disturbance up or down, above-mentioned control can keep rotor core in the equilibrium position all the time.
Beneficial effect: the present invention is a kind of same polarity hybrid magnetic bearing, and promptly magnetic pole of the stator all is same polarity, when high speed operation, can greatly reduce the magnetic hysteresis and the eddy current loss of rotor core; The present invention utilizes the annular permanent magnet of a radial magnetizing to set up quiescent biasing magnetic field; Form closed magnetic circuit through axial stator, rotor core and radial stator, utilize the axial pole wideer, produce biasing magnetic flux with axial component than rotor core; Greatly simplified the structure of magnetic bearing, it is convenient to install.Simultaneously; This magnetic bearing utilizes permanent magnet to produce the biasing magnetic flux; It is little also to have power consumption; The advantage that axial length is short has broad application prospects in high-speed applications such as flywheel energy storage, air condition compressor, turbomolecular pumps, and national defence fields such as Aero-Space and naval vessels that it is used in then have more significance.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is a magnetic circuit schematic diagram of the present invention.
Embodiment
Elaborate in the face of embodiments of the invention down, present embodiment provided detailed mode of execution and concrete operating process, but protection scope of the present invention is not limited to following embodiment being to implement under the prerequisite with technological scheme of the present invention.
As shown in Figure 1, present embodiment comprises stator module and rotor assembly, and wherein: stator module is located at the periphery of rotor assembly.
Described stator module comprises axial stator 1, radial stator 2, annular permanent magnet 3, axially controls winding 4 and radially control winding 5; Wherein: axially control winding 4 and be located on the magnetic pole of axial stator 1; Radially controlling winding 5 is located on the magnetic pole of radial stator 2 one ends; Annular permanent magnet 3 is attached at the outer end of radial stator 2, and the interior edge face and the annular permanent magnet 3 of axial stator 1 the other end contact.
Described rotor assembly comprises the first rotor 6, second rotor core 7 unshakable in one's determination and rotating shaft 8, and wherein: the first rotor 6 and second rotor core 7 unshakable in one's determination is socketed on respectively in the rotating shaft 8; The first rotor unshakable in one's determination 6 links to each other with second rotor core 7; The first rotor unshakable in one's determination 6 is located at axial stator 1 inside, only is used for circulation biasing magnetic flux, and available solid soft magnetic material is processed; The inside of radial stator 2 is located in second rotor core 7, can pass through alternating flux when rotated, for further reducing magnetic hysteresis and eddy current loss, processes with silicon steel plate stacking, and also the solid soft magnetic material of available high resistivity is processed.
The magnetic pole of axial stator 1 is provided with the magnetic groove, and the magnetic groove is convenient to axially control the layout of winding 4.Axial stator 1 is that soft magnetic material is processed.
In order to produce the biasing magnetic flux of axial component, described the first rotor 6 ends near axial control winding 4 unshakable in one's determination are provided with projection, and the width of described projection is provided with the width of the magnetic pole of axial control winding 4 less than axial stator 1.
Shown in the solid line among Fig. 2, the biasing magnetic flux that annular permanent magnet 3 produces passes through 6, second rotor core 7 unshakable in one's determination of axial stator 1, axial air-gap A, the first rotor, radial air gap B and radial stator 2 formation loops successively.Shown in doublet, the control magnetic flux of axially controlling winding 4 generations only passes through axial stator 1 and axial air-gap A.Shown in single dotted line, the control magnetic flux of radially controlling winding 5 generations only passes through radial air gap B and radial stator 2, without axial air-gap A.Axially control magnetic flux and radially control magnetic flux decoupling zero each other, do not disturb mutually.
Claims (5)
1. permanent-magnetic biased axial radial magnetic bearing; Comprise stator module and rotor assembly; It is characterized in that: described stator module comprises axial stator (1), radial stator (2), annular permanent magnet (3), axially controls winding (4) and radially control winding (5); Wherein: axially control winding (4) and be located on the magnetic pole of axial stator (1); Radially control winding (5) and be located on the magnetic pole of radial stator (2), annular permanent magnet (3) is attached at the outer end of radial stator (2), and the interior edge face of axial stator (1) and annular permanent magnet (3) contact; Described rotor assembly comprises the first rotor (6) unshakable in one's determination, second rotor core (7) and rotating shaft (8); Wherein: the first rotor (6) unshakable in one's determination and second rotor core (7) are socketed on respectively in the rotating shaft (8), and the first rotor (6) unshakable in one's determination links to each other with second rotor core (7), and the first rotor (6) unshakable in one's determination is located at the inside of axial stator (1); The inside of radial stator (2) is located in second rotor core (7); The magnetic pole of axial stator (1) is provided with is convenient to axially control the magnetic groove that winding is arranged, described the first rotor (6) unshakable in one's determination is provided with projection near an end of axial control winding (4), and the width of described projection is provided with the width of the magnetic pole of axial control winding (4) less than axial stator (1).
2. permanent-magnetic biased axial radial magnetic bearing according to claim 1 is characterized in that: described radial stator (2) is the structure of two pairs of magnetic poles of four teeth, and the radially control winding (5) on two relative teeth is connected in series.
3. permanent-magnetic biased axial radial magnetic bearing according to claim 1 is characterized in that: described radial stator (2) is to be processed by silicon steel plate stacking.
4. permanent-magnetic biased axial radial magnetic bearing according to claim 1 is characterized in that: described the first rotor (6) unshakable in one's determination is that solid soft magnetic material is processed.
5. permanent-magnetic biased axial radial magnetic bearing according to claim 1 is characterized in that: described second rotor core (7) is that solid soft magnetic material or silicon steel plate stacking are processed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101822359A CN101832335B (en) | 2010-05-25 | 2010-05-25 | Permanent magnet biased axial-radial magnetic bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101822359A CN101832335B (en) | 2010-05-25 | 2010-05-25 | Permanent magnet biased axial-radial magnetic bearing |
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| Publication Number | Publication Date |
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| CN101832335A CN101832335A (en) | 2010-09-15 |
| CN101832335B true CN101832335B (en) | 2012-06-20 |
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| CN2010101822359A Expired - Fee Related CN101832335B (en) | 2010-05-25 | 2010-05-25 | Permanent magnet biased axial-radial magnetic bearing |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108547868B (en) * | 2018-04-12 | 2020-02-07 | 南京邮电大学 | Semi-freedom degree radial magnetizing hybrid axial magnetic bearing |
| CN110131314B (en) * | 2019-06-12 | 2020-06-30 | 珠海格力电器股份有限公司 | Magnetic suspension bearing, motor, compressor and air conditioner |
| CN110735859A (en) * | 2019-09-17 | 2020-01-31 | 南京航空航天大学 | parallel permanent magnet biased axial-radial magnetic suspension bearing |
| FI128586B (en) * | 2019-10-03 | 2020-08-14 | Spindrive Oy | A magnetic actuator for a magnetic suspension system |
| CN110714984B (en) * | 2019-11-19 | 2024-08-09 | 黑龙江省科学院智能制造研究所 | Automatic stabilization device and stabilization method for axial displacement of magnetic suspension bearing |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4301076A1 (en) * | 1993-01-16 | 1994-07-21 | Forschungszentrum Juelich Gmbh | Magnetic bearing cell with rotor and stator |
| CN101158375A (en) * | 2007-11-07 | 2008-04-09 | 南京航空航天大学 | Low loss permanent magnetism bias radial direction magnetic bearing |
| CN101169160A (en) * | 2007-11-28 | 2008-04-30 | 江苏大学 | Three freedom degree conical rotor AC-DC hybrid magnetic bearing |
| CN101235848A (en) * | 2008-02-29 | 2008-08-06 | 南京化工职业技术学院 | Low consumption permanent magnetism biased axial radial magnetic bearing |
| CN101251149A (en) * | 2008-03-17 | 2008-08-27 | 南京化工职业技术学院 | Low power consumption 5-freedom permanent magnetism off-set magnetic suspension bearing system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4729702B2 (en) * | 2005-02-28 | 2011-07-20 | 国立大学法人九州工業大学 | Non-contact bearing device using superconducting bearing |
-
2010
- 2010-05-25 CN CN2010101822359A patent/CN101832335B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4301076A1 (en) * | 1993-01-16 | 1994-07-21 | Forschungszentrum Juelich Gmbh | Magnetic bearing cell with rotor and stator |
| CN101158375A (en) * | 2007-11-07 | 2008-04-09 | 南京航空航天大学 | Low loss permanent magnetism bias radial direction magnetic bearing |
| CN101169160A (en) * | 2007-11-28 | 2008-04-30 | 江苏大学 | Three freedom degree conical rotor AC-DC hybrid magnetic bearing |
| CN101235848A (en) * | 2008-02-29 | 2008-08-06 | 南京化工职业技术学院 | Low consumption permanent magnetism biased axial radial magnetic bearing |
| CN101251149A (en) * | 2008-03-17 | 2008-08-27 | 南京化工职业技术学院 | Low power consumption 5-freedom permanent magnetism off-set magnetic suspension bearing system |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2006-234124A 2006.09.07 |
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Granted publication date: 20120620 Termination date: 20130525 |