CN104154119A - Permanent magnet biased axial-radial magnetic bearing - Google Patents
Permanent magnet biased axial-radial magnetic bearing Download PDFInfo
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- CN104154119A CN104154119A CN201410335595.6A CN201410335595A CN104154119A CN 104154119 A CN104154119 A CN 104154119A CN 201410335595 A CN201410335595 A CN 201410335595A CN 104154119 A CN104154119 A CN 104154119A
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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
- F16C2360/00—Engines or pumps
- F16C2360/44—Centrifugal pumps
- F16C2360/45—Turbo-molecular pumps
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- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
The invention discloses a permanent magnet biased axial-radial magnetic bearing. The permanent magnet biased axial-radial magnetic bearing comprises a stator assembly and a rotor assembly, wherein the stator assembly comprises a radial stator, a flake permanent magnet and a radial control winding; the rotor assembly comprises a rotor and a rotor core; the rotor is sleeved with the rotor core; the stator assembly is arranged at the periphery of the rotor assembly; the stator assembly also comprises an axial stator which is arranged at the bottom end of a permanent magnet pole and arranged on two sides of the rotor core. The permanent magnet biased axial-radial magnetic bearing has the advantages of short magnetic flux path and small leakage flux; the axial stator arranged at the bottom end of the permanent magnet pole is used for generating biased magnetic flux with an axial component, so that the structure of the magnetic bearing is greatly simplified and conveniently assembled; meanwhile, the permanent magnet is used for generating the biased magnetic flux, so that the magnetic bearing has the advantages of low power consumption and short axial length and has wide application prospects in high-speed application places of flywheel energy storage, air condition compressors, turbo molecular pumps and the like; the magnetic bearing is of relatively great significance when being applied to the national defense field of aerospace and ships and the like.
Description
Technical field
Permanent-magnetic biased axial radial magnetic bearing of the present invention belongs to the technical field of the hybrid magnetic bearing in magnetic bearing.
Background technique
Magnetic suspension bearing is again referred to as magnetic bearing, be utilize magnetic force between stator and rotor by rotor suspension in space, make not have between stator and rotor a kind of novel high-performance bearing of Mechanical Contact.Owing to there not being contact mechanically between stator and rotor, so the rotor of magnetic suspension bearing can reach very high running rotating speed, and there is the advantages such as mechanical wear is little, energy consumption is low, the life-span is long, unlubricated, pollution-free, be particularly suitable at a high speed, vacuum and the super special application such as clean.
At present, the mode that magnetic bearing provides according to magnetic force is divided into following several: the first is active magnetic bearings, in this magnetic bearing coil, there is bias current, so that bias magnetic field to be provided, by control electric current flow through control winding produce control magnetic flux with biasing magnetic flux superpose, thereby produce controlled suspending power, volume, weight and power consumption are all larger.The second is passive magnetic bearing, the suspending power of this magnetic bearing is provided by permanent magnet completely, and its required controller is simple, and suspension power consumption is little, but rigidity and damping are all less, only generally apply in one direction supporting object or alleviate the load acting on traditional bearing.The third is hybrid magnetic bearing, the electromagnet that this magnetic bearing adopts permanent-magnet material to substitute in active magnetic bearings produces bias magnetic field, the just balanced load that electromagnet provides or the controlling magnetic field of interference, greatly reduce the power loss producing because of bias current, the required Number of ampere turns of electromagnet is the half of active magnetic bearings, dwindle the volume of magnetic bearing, alleviated its weight, and improved bearing capacity.
The permanent-magnetic biased axial radial magnetic bearing structural type of research is mainly divided into two kinds in the world at present, one 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 axially and radially to integrate, compact structure, and rotor dynamic performance is improved.But the same polarity structural type that adopts, utilizes axial stator to form biasing magnetic circuit more, makes radial stator magnetic pole form same polarity and arranges, and the hysteresis loss of magnetic bearing is reduced.
Patent ZL200910030100.8 discloses a kind of axial-radial magnetic bearing of permanent magnet bias, comprise radial stator, flaky permanent magnet, radially control winding, simplex winding axial control winding, be sleeved on epitrochanterian rotor core.Radial stator is six field structures that are arranged symmetrically with, and is respectively three and is set with the control magnetic pole of radially controlling winding, three permanent magnetism magnetic poles that embed flaky permanent magnet of arranging with control pole piece spacing.But the complex structure of this patent, installs inconvenience.
Summary of the invention
For addressing the above problem, the present invention aims to provide a kind of permanent-magnetic biased axial radial magnetic bearing, and adopts following scheme:
A kind of permanent-magnetic biased axial radial magnetic bearing, comprise stator module and rotor assembly, described stator module comprises radial stator 1, flaky permanent magnet 2 and radially controls winding 3, described rotor assembly comprises rotor 5 and rotor core 6, rotor core (6) is sleeved on rotor 5, and described stator module is arranged on the periphery of rotor assembly, it is characterized in that: described stator module also comprises axial stator 4, described axial stator 4 is arranged at the bottom of permanent magnetism magnetic pole, and is placed in rotor core both sides.
Eight field structures of radial stator 1 for being arranged symmetrically with, described magnetic pole is to be set with the control magnetic pole of controlling winding 3; Flaky permanent magnet 2 is 4 permanent magnetism magnetic poles; Radially controlling winding 3 is that two radially control windings in series are in opposite directions joined; Rotor core 6 adopts silicon steel sheet stack to be pressed into.
Advantage of the present invention is: permanent-magnetic biased axial radial magnetic bearing of the present invention, radial offset magnetic flux, control magnetic flux are completely closed in same plane, so have advantages of that magnetic flux path is short and leakage field is less.Utilization is placed in the axial stator of permanent magnetism magnetic pole bottom, produces the biasing magnetic flux with axial component, has greatly simplified the structure of magnetic bearing, and it is convenient to install.Simultaneously, this magnetic bearing utilizes permanent magnet to produce biasing magnetic flux, also there is power consumption little, the advantage that axial length is short, have broad application prospects in high-speed applications such as flywheel energy storage, air condition compressor, turbomolecular pumps, be used in the national defence such as Aero-Space and naval vessels field and have more significance.
Brief description of the drawings
Fig. 1 is a kind of structural representation of permanent-magnetic biased axial radial magnetic bearing.
Fig. 2 is the plan view of Fig. 1.
Fig. 3 is a kind of permanent-magnetic biased axial radial magnetic bearing fundamental diagram.
Fig. 4 is the plan view of Fig. 3.
In figure: 1, radial stator; 2, flaky permanent magnet; 3, radially control winding; 4, axial stator; 5, rotor; 6, rotor core.
Embodiment
Below in conjunction with accompanying drawing, technological scheme of the present invention is elaborated:
As shown in Figure 1, Heteropolarity permanent magnetism bias axial and radial magnetic bearings of the present invention, comprise stator module and rotor assembly, described stator module comprises radial stator 1, eight field structures that wherein radial stator 1 is arranged for space symmetr, on radial stator 1 magnetic pole, spacer sleeve is equipped with four and radially controls winding 3, two radially control windings in series are in opposite directions joined, 4 embed flaky permanent magnet 2 for permanent magnetism magnetic pole, axial stator is equipped with in its bottom, be placed in and control between magnetic pole, in order to produce biasing magnetic flux.Described rotor assembly comprises rotor 5 and rotor core 6, and rotor core 6 is sleeved on rotor 5, is placed in radial stator 1, and because this magnetic bearing magnetic pole is that different pole is arranged, for reducing magnetic hysteresis and eddy current loss, the suspended rotor silicon steel sheet stack that adopts unshakable in one's determination is pressed into.Its axial basic functional principle is: because axial stator is equipped with in permanent magnetism magnetic pole bottom, the permanent magnet bias magnetic flux of four flaky permanent magnet generations is in the time arriving rotor core through radial permanent magnet magnetic pole, axial air-gap, produce the biasing magnetic flux with axial component, realized the driven suspension of rotor core.The working principle of radial direction magnetic bearing is: because the magnetic resistance of permanent magnet is larger, control magnetic flux without permanent magnetism magnetic pole, the degaussing to permanent magnet can avoid controlling magnetic flux with biasing magnetic flux opposite direction time.When rotor is in equilibrium position, flaky permanent magnet produces equal biasing magnetic flux at control magnetic pole air gap place, and making like this rotor be subject to resultant radial force is zero, is stabilized in equilibrium position.Due to the symmetry properties of structure, the magnetic flux that permanent magnet produces equates at the place of air gap up and down of rotor, and now upper and lower suction equates.If rotor is subject to the downward outer power of disturbing in the time of this equilibrium position, rotor will depart from reference position and move downward, cause the flux change of the air gap up and down of permanent magnet generation, air gap above increases, the magnetic flux that permanent magnet produces is reduced, air gap below reduces, and the magnetic flux that permanent magnet produces is increased.Due to square being directly proportional of magnetic force and magnetic flux, therefore suction is below less than suction above, and before access control magnetic flux, rotor cannot be got back to equilibrium position.Control winding and produce control magnetic flux, control magnetic flux superimposed with biasing magnetic flux at upper air gap place, and offset with the magnetic flux of setovering at lower air gap place.Magnetic flux in air gap is greater than the magnetic flux of another side air gap on one side, and the difference of both sides radial air gap magnetic flux has produced controlled restoring force to rotor, makes rotor stability in radial equilibrium position.If rotor is subject to the outer power of disturbing upwards, can analyze by similar method, obtain contrary conclusion.In like manner, no matter rotor is subject to outer disturbance,, up or down left to the right, by the electric current in controller control exciting winding, regulate the size of each air-gap flux with the degenerative permanent-magnetic biased axial radial magnetic bearing in position, can keep all the time rotor in equilibrium position.
Fig. 1, Fig. 2 is permanent-magnetic biased axial radial magnetic bearing structural representation of the present invention, Fig. 1, radial stator 1 in Fig. 2 is pressed into for silicon steel sheet stack, for eight field structures that are arranged symmetrically with, on four magnetic pole of the stator, overlap to have and radially control winding 3, two radially windings in series in opposite directions connect, form and control magnetic pole, four flaky permanent magnet 2 intervals are embedded in other four radial stators, form permanent magnetism magnetic pole, be placed in and control between magnetic pole, in order to produce biasing magnetic flux, but axial stator 4 is equipped with in the permanent magnetism magnetic pole bottom in radial stator, generation has the biasing magnetic flux of axial component.Magnetic circuit figure as shown in Figure 3, Figure 4.The biasing magnetic flux that flaky permanent magnet produces passes through successively radial permanent magnet magnetic pole, axial stator, axial air-gap, rotor core, radial air gap, radially controls magnetic pole formation closed-loop path, as shown in the solid line in Fig. 3, Fig. 4.The control magnetic flux of radially controlling winding generation only passes through radial air gap and radial stator, and rotor core, without axial air-gap, as shown in the single dotted line in Fig. 3, Fig. 4.Axialy offset magnetic flux and radially control magnetic flux decoupling zero each other, does not interfere with each other.
Below announced the present invention with preferred embodiment, so it is not intended to limiting the invention, and all technological schemes of taking the form that is equal to replacement or equivalent transformation to obtain, within all dropping on protection scope of the present invention.
Claims (5)
1. a permanent-magnetic biased axial radial magnetic bearing, comprise stator module and rotor assembly, described stator module comprises radial stator (1), flaky permanent magnet (2) and radially controls winding (3), described rotor assembly comprises rotor (5) and rotor core (6), rotor core (6) is sleeved on rotor (5), described stator module is arranged on the periphery of rotor assembly, it is characterized in that: described stator module also comprises axial stator (4), described axial stator (4) is arranged at the bottom of permanent magnetism magnetic pole, and is placed in rotor core both sides.
2. a kind of permanent-magnetic biased axial radial magnetic bearing according to claim 1, is characterized in that eight field structures of described radial stator (1) for being arranged symmetrically with, and described magnetic pole is for being set with the control magnetic pole of controlling winding (3).
3. a kind of permanent-magnetic biased axial radial magnetic bearing according to claim 1, is characterized in that flaky permanent magnet (2) is 4 permanent magnetism magnetic poles.
4. a kind of permanent-magnetic biased axial radial magnetic bearing according to claim 1, it is characterized in that radially controlling winding (3) is that two radially control windings in series are in opposite directions joined.
5. permanent-magnetic biased axial radial magnetic bearing according to claim 1, is characterized in that: above-mentioned rotor core (6) adopts silicon steel sheet stack to be pressed into.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410335595.6A CN104154119A (en) | 2014-07-16 | 2014-07-16 | Permanent magnet biased axial-radial magnetic bearing |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410335595.6A CN104154119A (en) | 2014-07-16 | 2014-07-16 | Permanent magnet biased axial-radial magnetic bearing |
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| CN104154119A true CN104154119A (en) | 2014-11-19 |
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| CN201410335595.6A Pending CN104154119A (en) | 2014-07-16 | 2014-07-16 | Permanent magnet biased axial-radial magnetic bearing |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106337876A (en) * | 2016-10-13 | 2017-01-18 | 中国人民解放军海军工程大学 | Heterospolar type permanent magnet bias mixed radial magnetic bearing |
| CN108547868A (en) * | 2018-04-12 | 2018-09-18 | 南京邮电大学 | A kind of mixed type axial magnetic bearing of the radial magnetizing of semi-freedom |
| CN110131314A (en) * | 2019-06-12 | 2019-08-16 | 珠海格力电器股份有限公司 | Magnetic suspension bearing, motor, compressor and air conditioner |
| CN117249163A (en) * | 2023-09-19 | 2023-12-19 | 淮阴工学院 | Three-degree-of-freedom hybrid magnetic bearing with radial auxiliary excitation |
| CN117477815A (en) * | 2023-11-07 | 2024-01-30 | 沈阳工业大学 | Permanent magnet offset type cylindrical-conical hybrid rotor bearingless switch reluctance motor |
Citations (4)
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| JP2005061578A (en) * | 2003-08-19 | 2005-03-10 | Iwaki Co Ltd | Magnetic bearing |
| CN1752471A (en) * | 2005-11-10 | 2006-03-29 | 北京航空航天大学 | Low watt consumption permanent magnet offset external rotor hybrid radial magnetic bearing |
| CN101413539A (en) * | 2008-11-19 | 2009-04-22 | 南京化工职业技术学院 | Heteropolarity permanent magnetism bias axial and radial magnetic bearings |
| CN203939869U (en) * | 2014-07-16 | 2014-11-12 | 南京化工职业技术学院 | A kind of permanent-magnetic biased axial radial magnetic bearing |
-
2014
- 2014-07-16 CN CN201410335595.6A patent/CN104154119A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005061578A (en) * | 2003-08-19 | 2005-03-10 | Iwaki Co Ltd | Magnetic bearing |
| CN1752471A (en) * | 2005-11-10 | 2006-03-29 | 北京航空航天大学 | Low watt consumption permanent magnet offset external rotor hybrid radial magnetic bearing |
| CN101413539A (en) * | 2008-11-19 | 2009-04-22 | 南京化工职业技术学院 | Heteropolarity permanent magnetism bias axial and radial magnetic bearings |
| CN203939869U (en) * | 2014-07-16 | 2014-11-12 | 南京化工职业技术学院 | A kind of permanent-magnetic biased axial radial magnetic bearing |
Non-Patent Citations (1)
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| 赵旭升: "永磁偏置磁轴承的研究现状及其发展", 《电工技术学报》 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106337876A (en) * | 2016-10-13 | 2017-01-18 | 中国人民解放军海军工程大学 | Heterospolar type permanent magnet bias mixed radial magnetic bearing |
| CN106337876B (en) * | 2016-10-13 | 2018-10-16 | 中国人民解放军海军工程大学 | Heteropolar formula permanent magnetic offset mixed radial magnetic bearing |
| CN108547868A (en) * | 2018-04-12 | 2018-09-18 | 南京邮电大学 | A kind of mixed type axial magnetic bearing of the radial magnetizing of semi-freedom |
| CN110131314A (en) * | 2019-06-12 | 2019-08-16 | 珠海格力电器股份有限公司 | Magnetic suspension bearing, motor, compressor and air conditioner |
| CN117249163A (en) * | 2023-09-19 | 2023-12-19 | 淮阴工学院 | Three-degree-of-freedom hybrid magnetic bearing with radial auxiliary excitation |
| CN117249163B (en) * | 2023-09-19 | 2024-06-11 | 淮阴工学院 | Three-degree-of-freedom hybrid magnetic bearing with radial auxiliary excitation |
| CN117477815A (en) * | 2023-11-07 | 2024-01-30 | 沈阳工业大学 | Permanent magnet offset type cylindrical-conical hybrid rotor bearingless switch reluctance motor |
| CN117477815B (en) * | 2023-11-07 | 2024-05-28 | 沈阳工业大学 | Permanent magnet offset type cylindrical-conical hybrid rotor bearingless switch reluctance motor |
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Address after: Liuhe chemical industry park of Nanjing city in Jiangsu province 210048 geguan Road No. 625 Applicant after: Nanjing Scientific Professional School Address before: Liuhe chemical industry park of Nanjing city in Jiangsu province 210048 geguan Road No. 625 Applicant before: Nanjing College of Chemical Technology |
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Application publication date: 20141119 |