CN201934504U - Permanent magnet biased axial and radial magnetic bearing - Google Patents
Permanent magnet biased axial and radial magnetic bearing Download PDFInfo
- Publication number
- CN201934504U CN201934504U CN2010202025960U CN201020202596U CN201934504U CN 201934504 U CN201934504 U CN 201934504U CN 2010202025960 U CN2010202025960 U CN 2010202025960U CN 201020202596 U CN201020202596 U CN 201020202596U CN 201934504 U CN201934504 U CN 201934504U
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- Prior art keywords
- stator
- axial
- magnetic
- radial
- rotor
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- Expired - Fee Related
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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
Abstract
The utility model discloses a permanent magnet biased axial and radial magnetic bearing in the magnetic bearing technical field. A stator member includes an axial stator, a radial stator, an annular permanent magnet, an axial control winding and a radial control winding; the axial control winding is arranged on a magnetic pole at one end of the axial stator; an inner end surface at the other end of the axial stator is in contact with the annular permanent magnet; the radial control winding is arranged on the magnetic pole of the axial stator; the annular permanent magnet is attached to the outer end of the radial stator; the rotor member includes a first rotor iron core, a rotating shaft and a second rotor iron core; the first rotor iron core and the second rotor iron core are respectively sleeved on the rotating shaft; the first rotor iron core and the second rotor iron core are linked; and the first rotor iron core and the second rotor iron core are disposed inside the axial stator and the radial stator. The utility model simplifies the structure of the magnetic bearing, is convenient in installation, and has low power consumption and short axial length.
Description
Technical field
The utility model relates to 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 there is not 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 super cleaning.
At present, the mode that magnetic bearing provides according to magnetic force is divided into following several: first kind is active magnetic bearings, there is bias current in this magnetic bearing coil, so that bias magnetic field to be provided, superpose 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, 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 half of active magnetic bearings, dwindle the volume of magnetic bearing, alleviated its weight, and improved bearing capacity.
Find through literature search: Chinese invention patent application number: 200810236276.4 prior art, 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.The permanent-magnetic biased axial radial magnetic bearing of this technology 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 axially and radially to integrate, 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.
The model utility content
The model utility purpose: the purpose of this utility model is to overcome the deficiencies in the prior art, and a kind of permanent-magnetic biased axial radial magnetic bearing is provided, and is simple in structure, is easy to control, is convenient to processing, and solved the problem of axial installation well.
Technological scheme: the utility model is achieved through the following technical solutions, and the utility model comprises 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 is unshakable in one's determination to be provided with projection near an end of axially controlling 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 utility model is: the magnet pole widths of axial stator is greater than the width of the first rotor iron core, 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 is positioned at the longitudinal balance position, because the symmetry properties of structure, the left and right sides both ends of the surface magnetic circuit of rotor core equates, 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 is subjected to 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, power amplifier is transformed into the control electric current with this control signal again, this electric current is flowed through and is 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, the magnetic flux at the air gap place, right side of rotor core is increased, the magnetic flux at air gap place, left side reduces, produce a suction to the right, rotor core is retracted the equilibrium position.In like manner, rotor core is subjected to axial outer disturbance left, can make rotor core be returned to the equilibrium position equally.
Radially working principle of the present utility model 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 is subjected to 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 of controlling in magnetic flux and the air gap by 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, produce a suction to the right, rotor core is retracted the equilibrium position.In like manner, no matter rotor core is subjected to 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 utility model is a kind of same polarity hybrid magnetic bearing, be that 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 utility model utilizes the annular permanent magnet of a radial magnetizing to set up quiescent biasing magnetic field, form closed magnetic circuit by axial stator, rotor core and radial stator, the axial pole that utilization is wideer than rotor core, generation has the biasing magnetic flux of axial component, 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, have broad application prospects in high speed applications such as flywheel energy storage, air condition compressor, turbomolecular pumps, 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 utility model;
Fig. 2 is a magnetic circuit schematic diagram of the present utility model.
Embodiment
Below embodiment of the present utility model is elaborated; present embodiment is being to implement under the prerequisite with technical solutions of the utility model; provided detailed mode of execution and concrete operating process, but protection domain of the present utility model is not limited to following embodiment.
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 iron core 6, second rotor core 7 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 iron core 6 is located at axial stator 1 inside, only is used for circulation biasing magnetic flux, and available solid soft magnetic material is made; 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, makes with silicon steel plate stacking, and also the solid soft magnetic material of available high resistivity is made.
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 made.
In order to produce the biasing magnetic flux of axial component, described the first rotor unshakable in one's determination 6 is provided with projection near an end of axially controlling 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.
Radial stator 2 is structures of two pairs of magnetic poles of four teeth, and the radially control winding 5 on two relative teeth is connected in series, and radial stator 2 is to be made by silicon steel plate stacking.
Shown in the solid line among Fig. 2, the biasing magnetic flux that annular permanent magnet 3 produces constitutes the loop through axial stator 1, axial air-gap A, the first rotor iron core 6, second rotor core 7, radial air gap B and radial stator 2 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 (4)
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 control 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), annular permanent magnet (3) is attached at the outer end of radial stator (2), the interior edge face of axial stator (1) and annular permanent magnet (3) contact, described rotor assembly comprises the first rotor iron core (6), second rotor core (7) and rotating shaft (8), wherein: the first rotor iron core (6) and second rotor core (7) are socketed on respectively in the rotating shaft (8), the first rotor iron core (6) links to each other with second rotor core (7), the first rotor iron core (6) is located at the inside of axial stator (1), and the inside of radial stator (2) is located in second rotor core (7).
2. permanent-magnetic biased axial radial magnetic bearing according to claim 1 is characterized in that: the magnetic pole of described axial stator (1) is provided with the magnetic groove.
3. permanent-magnetic biased axial radial magnetic bearing according to claim 1, it is characterized in that: described the first rotor iron core (6) is provided with projection near an end of axially controlling 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).
4. 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202025960U CN201934504U (en) | 2010-05-25 | 2010-05-25 | Permanent magnet biased axial and radial magnetic bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202025960U CN201934504U (en) | 2010-05-25 | 2010-05-25 | Permanent magnet biased axial and radial magnetic bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201934504U true CN201934504U (en) | 2011-08-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202025960U Expired - Fee Related CN201934504U (en) | 2010-05-25 | 2010-05-25 | Permanent magnet biased axial and radial magnetic bearing |
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| Country | Link |
|---|---|
| CN (1) | CN201934504U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102303709A (en) * | 2011-08-31 | 2012-01-04 | 北京航空航天大学 | Large-torque magnetic suspension flywheel |
-
2010
- 2010-05-25 CN CN2010202025960U patent/CN201934504U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102303709A (en) * | 2011-08-31 | 2012-01-04 | 北京航空航天大学 | Large-torque magnetic suspension flywheel |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110817 Termination date: 20120525 |