CN103758865B - Permanent magnet bias one side axial magnetic suspension bearing - Google Patents
Permanent magnet bias one side axial magnetic suspension bearing Download PDFInfo
- Publication number
- CN103758865B CN103758865B CN201410010004.8A CN201410010004A CN103758865B CN 103758865 B CN103758865 B CN 103758865B CN 201410010004 A CN201410010004 A CN 201410010004A CN 103758865 B CN103758865 B CN 103758865B
- Authority
- CN
- China
- Prior art keywords
- magnetic pole
- stator
- magnetic
- suspension bearing
- end thrust
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
- F16C32/044—Active magnetic bearings
- F16C32/0459—Details of the magnetic circuit
- F16C32/0461—Details of the magnetic circuit of stationary parts of the magnetic circuit
- F16C32/0465—Details of the magnetic circuit of stationary parts of the magnetic circuit with permanent magnets provided in the magnetic circuit of the electromagnets
-
- 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
- F16C32/044—Active magnetic bearings
- F16C32/0474—Active magnetic bearings for rotary movement
- F16C32/0476—Active magnetic bearings for rotary movement with active support of one degree of freedom, e.g. axial magnetic bearings
Landscapes
- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
The present invention relates to a kind of permanent magnet bias one side axial magnetic suspension bearing, be generally employed in pairs, belong to hybrid magnetic suspension bearing.Stator internal magnetic pole and stator outer magnetic pole are placed in end thrust dish side by it；Utilize end thrust dish step surface as magnetic pole strength；Utilize axial charging annular permanent magnnet and control winding set up bias magnetic field at the inside and outside magnetic pole of stator and end thrust dish air gap respectively and control magnetic field, after using in pairs, realize axial Bit andits control；And open Cooling Holes on the inside and outside magnetic pole of stator.This permanent magnetism off-set magnetic suspension bearing is installed, convenient disassembly, its thrust disc radius is less, power consumption is little, volume is little, the quiescent biasing power on rotor can be overcome, there is preferable cooling capacity, all kinds of magnetic suspension systems have bright prospects, and is particularly well-suited to the occasion that the windage loss such as high-speed compressor, decompressor is magnetic suspension bearing dominant loss.
Description
Technical field
The present invention relates to a kind of magnetic suspension bearing, be specifically related to a kind of permanent magnet bias one side axial magnetic suspension axle
Hold.
Background technology
The ultimate principle of magnetic suspension bearing is to utilize the magnetic force between stator core and rotor core to realize
The contactless supporting of rotor.Owing to magneticaction is without medium so that mechanical contact between stator and rotor.
Magnetic suspension bearing has following major advantage: (1) rotor can operate under ultrahigh rotating speed, theoretical
Upper rotating speed is limited solely by rotor material；(2) contactless, without lubricating and without the characteristic worn and torn, making magnetcisuspension
Floating axle is promised and is used cleaning sterile space, the occasion such as vacuum system, low temperature environment, even hot environment
In；(3) bearing loss is the lowest, is only tradition ball bearing or the 1/20 to 1/5 of sliding bearing；(4)
Owing to mechanical is worn and torn, its maintenance cost in severe rugged environment is lower, and the life-span is longer.
Magnetic suspension bearing is divided into permanent-magnet type, electromagnetism eccentrically arranged type and permanent magnet bias by the mode that magnetic field is set up
Type.
Permanent-magnet type magnetic suspension bearing utilizes the suction of magnetic material or repulsion to realize the suspension of rotor, structure
Simply, but its damping is typically small.
Electromagnetism eccentrically arranged type magnetic suspension bearing produces bias magnetic field, alternating current by current offset in air gap
Winding produces control magnetic field in air gap, and bias magnetic field and the magnetic force controlling magnetic field superposition generation can be according to instead
Feedback signal precision controls magnetic force, thus realizes the control of the degree of freedom of rotor certain or some, this type
Magnetic suspension bearing rigidity, damp adjustable.But owing to the bias current under stable case is much larger than controlling electric current,
Cause winding to produce more power attenuation, and volume, the weight needed for producing case unit capacity is bigger.
Comparing magnetic bias type magnetic suspension bearing, permanent magnet bias type magnetic suspension bearing is then substituted by permanent magnetic iron
Bias coil produces required bias magnetic field in air gap, can not only largely reduce energy consumption, also
The temperature rise of magnetic suspension bearing can be reduced, moreover it is possible to reduce volume and the weight of magnetic suspension bearing.This is right at some
The aspects such as magnetic suspension power consumption, volume, performance have the field of requirements at the higher level to have irreplaceable advantage, forever
Magnetic bias type magnetic suspension bearing technology has become an important directions in magnetic suspension bearing technology.
Windage loss, is a kind of gas friction losses.Owing to hyperbar makes windage loss in compressor and decompressor
It is main loss (higher at gas pressure in compressor and decompressor), especially cod thrust
Dish, it has relatively large diameter and superficial velocity.It is generally believed that windage loss is substantially proportional to circumference
The cube of speed.Therefore, the magnetic suspension bearing with small diameter thrust disc can largely reduce
Windage loss.
In most compressors and decompressor, often occur that aerodynamic force produces bigger biasing on rotor
The situation of axial force.So, have and can produce quiescent biasing axial force and produce the magnetic suspension of less power consumption
Bearing more can meet use requirement.
Summary of the invention
Present invention is primarily targeted at a kind of simple installation of proposition, power consumption is little, volume is little, it is simple to produce
The permanent magnet bias one side axial magnetic suspension bearing of biasing magnetic force.
For reaching above-mentioned purpose, the technical solution used in the present invention is: include step-like main shaft and set
The stepped end thrust disc being contained on fast headstock terrace, and end thrust dish large end face is against main shaft step
Install；Pacify respectively on position corresponding with the inside and outside step surface of stepped end thrust disc on main shaft
Equipped with stator internal magnetic pole and stator outer magnetic pole, described stator internal magnetic pole is step-like structure, the outer magnetic of stator
Extremely circular ring, and the equal diameters of stator internal magnetic pole and stator outer magnetic pole, stator outer magnetic pole and fixed
Form a step-like cavity between sub-internal magnetic pole, the end face in stator internal magnetic pole small stair face is installed
There is annular permanent magnnet, control winding is installed in stator outer magnetic pole, outside annular permanent magnnet also
Permanent magnet guard shield is installed, the face that stator outer magnetic pole contacts with stator internal magnetic pole is also equipped with annular
Non-magnetic pad.
Described stator outer magnetic pole all offers several weeks at the outside same radius of stator internal magnetic pole
To uniform stator outer magnetic pole louvre and stator internal magnetic pole louvre.
Described stator internal magnetic pole and the interior step surface of end thrust dish, stator outer magnetic pole and end thrust dish
The outer step anchor ring of interior step surface leave gap, its gap width is between 0.3～1.5mm；Stator
Internal magnetic pole radially has gap with main shaft, and its gap width is more than or equal to 0.5mm；Stator outer magnetic pole and end
Portion's thrust disc has gap compared with the radial direction of small cylindrical surface, and its gap is more than or equal to 1.0mm.
Described end thrust dish, stator internal magnetic pole louvre, stator internal magnetic pole are soft magnetic materials；Main shaft,
Permanent magnet guard shield is non-magnet material；Annular permanent magnnet is rare earth permanent-magnetic material or ferrite permanent-magnet material
Material.
The permanent magnet bias one side axial magnetic suspension bearing of the present invention can use in pairs, and the annular of axial charging is forever
For a long time Magnet is by stator internal magnetic pole, end thrust dish, stator outer magnetic pole, gap between outer magnetic pole in stator
And permanent magnet guard shield air gap between step surface and fixed in stator internal magnetic pole and end thrust dish respectively
Air gap between step surface is formed in sub-outer magnetic pole and end thrust dish bias magnetic field；Control winding logical
After entering electric current, by stator internal magnetic pole, annular non-magnetic pad, stator outer magnetic pole and end thrust
Dish air gap between step surface and stator outer magnetic pole and end in stator internal magnetic pole and end thrust dish respectively
In portion's thrust disc, air gap between step surface is formed and control magnetic field.Above-mentioned magnetic suspension bearing makes the most in pairs
With, it is respectively arranged in two ends of main shaft.
Permanent magnet bias one side of the present invention axial magnetic suspension bearing mainly has the advantage that (1) is originally
The stationary part of invention can be easy for installation and removal from the unilateral installation of main shaft；(2) present invention utilizes forever
Magnet produces biasing magnetic flux for a long time, especially, when using in pairs, if there being quiescent biasing power to act on rotor
Time upper, the different biasing magnetic flux that both sides produce can be offset or this quiescent biasing power of partial offset, decreases
Power consumption and volume；(3) the end thrust dish diameter of axial magnetic suspension bearing of the present invention is less, can
It is equal or slightly larger than maximum principal axis diameter, not only makes axial magnetic suspension bearing rotor portion requirement of strength drop
Low, and its windage loss is the least；(4) permanent magnet is used to produce biasing magnetic flux, with full electromagnetic bearing phase
Ratio eliminates the biasing exciting current accounting for fundamental component in coil current, reduces winding copper loss and control
Power amplifier is lost, and therefore power consumption is the lowest；(5) magnetic field that axial magnetic suspension bearing of the present invention produces is only
Size variation, and nonpolarity change, iron loss is the least；(6) in the present invention, permanent magnetic circuit and control
Magnetic circuit separates, and this makes magnetic circuit magnetic resistance the least, and smaller current can produce bigger magnetic flux；(7) forever
Magnetic bias one side axial magnetic suspension bearing, with louvre, improves the cooling capacity of bearing, it is allowed to higher
Winding temperature rise.
The present invention installs, convenient disassembly, and thrust disc radius is less, and power consumption is little, and volume is little, can overcome and turn
Quiescent biasing power on son, has preferable cooling capacity, has bright prospects in all kinds of magnetic suspension systems,
And it is particularly well-suited to the applied field that the windage loss such as high-speed compressor, decompressor is magnetic suspension bearing dominant loss
Close.
Accompanying drawing explanation
Fig. 1 is the structural representation of permanent magnet bias one side of the present invention axial magnetic suspension bearing.
Label title in Fig. 1: 1, main shaft.2, end thrust dish.3, permanent magnet guard shield.4, ring
Shape permanent magnet.5, stator outer magnetic pole louvre.6, stator outer magnetic pole.7, annular non-magnetic pad.
8, winding is controlled.9, stator internal magnetic pole louvre.10, stator internal magnetic pole.Dotted line with hollow arrow
Representing permanent magnet bias magnetic field, the solid line of band filled arrows represents the magnetic field controlling winding generation.
Detailed description of the invention
Below in conjunction with the accompanying drawings the present invention is described in further detail.
See Fig. 1, the end thrust dish 2 in figure, stator internal magnetic pole louvre 9, stator internal magnetic pole 10
It is made up of soft magnetic materials；Main shaft 1, permanent magnet guard shield 3, annular non-magnetic pad 7 is non-magnetic material
Material；Annular permanent magnnet 4 is rare earth permanent-magnetic material or ferrite permanent-magnet materials.End thrust dish 2 big
End face is installed against main shaft 1 step；Annular permanent magnnet 4 is arranged on stator internal magnetic pole 10 cylinder end face
On, permanent magnet guard shield 3 is arranged on stator internal magnetic pole 10 cylinder end face and side, and annular is forever
Long Magnet 4 contacts between stator internal magnetic pole 10 and permanent magnet guard shield 3 and with both；Control around
Group 8 is arranged in stator outer magnetic pole 6 cylinder, and leaves space with permanent magnet guard shield 3；The outer magnetic of stator
Pole 6 is installed on stator internal magnetic pole 10 by annular non-magnetic pad 7,7 liang of annular non-magnetic pad
Side contacts with stator outer magnetic pole 6 and stator internal magnetic pole 10 respectively；Permanent magnet guard shield 3, annular is forever
Magnet 4 and control winding 8 are all at stator outer magnetic pole 6, annular non-magnetic pad 7 and stator internal magnetic pole for a long time
In 10 cavitys formed；Stator outer magnetic pole 6 and stator internal magnetic pole 10 at the same radius of outside all with
The louvre structure that several circumferences are uniform, respectively stator outer magnetic pole louvre 5 and stator internal magnetic pole dissipate
Hot hole 9；Main shaft 1 is positioned at the centre bore of stator internal magnetic pole 10 and stator outer magnetic pole 6, and in stator
Magnetic pole 10 and stator outer magnetic pole 6 are placed in end thrust dish 2 side, and they are respectively in the face of end thrust dish
The inside and outside step surface of 2.
The stator internal magnetic pole 10 of the present invention is step-like structure, and stator outer magnetic pole 6 is circular ring,
And the equal diameters of stator internal magnetic pole 10 and stator outer magnetic pole 6, stator outer magnetic pole 6 and stator internal magnetic pole
Form a step-like cavity between 10, the end face in stator internal magnetic pole 10 small stair face is provided with
Annular permanent magnnet 4, is provided with control winding 8 in stator outer magnetic pole 6.Stator internal magnetic pole 10 and end
The outer step of the interior step surface of the interior step surface of portion's thrust disc 2, stator outer magnetic pole 6 and end thrust dish 2
Anchor ring leaves gap, and its gap width is between 0.3～1.5mm；Stator internal magnetic pole 10 and main shaft 1
Radially having gap, its gap width is more than or equal to 0.5mm；Stator outer magnetic pole 6 and end thrust dish 2
The radial direction of relatively small cylindrical surface has gap, and its gap is more than or equal to 1.0mm.
The annular permanent magnnet 4 of the axial charging in Fig. 1 by stator internal magnetic pole 10, end thrust dish 2,
Stator outer magnetic pole 6, gap between outer magnetic pole in stator, permanent magnet guard shield 3 and stator internal magnetic pole 6
And air gap between step surface and stator outer magnetic pole 6 and step in end thrust dish 2 in end thrust dish 2
Air gap between face forms permanent magnet bias field circuit, as shown in arrow single in Fig. 1；Control winding 8
After being passed through electric current, by stator internal magnetic pole 10, annular non-magnetic pad 7, stator outer magnetic pole 6,
Air gap between step surface in end thrust dish 2 and stator internal magnetic pole 6 and end thrust dish 2, stator
In outer magnetic pole and end thrust dish 3, the air gap between step surface forms control field circuit, as double in Fig. 1
Shown in arrow.Above-mentioned magnetic suspension bearing is generally employed in pairs in pairs, is respectively arranged in two of main shaft
End (right-hand axis suspension bearing structure is identical, is not drawn into).
If without the quiescent biasing masterpiece used time on rotor main shaft 1, the above-mentioned magnetic suspension bearing used in pairs can set
Count into identical parameter.Its basic functional principle is: when main shaft 1 is in equilbrium position, two ends air gap
Equal, left and right stator produces identical suction to rotor.If now main shaft 1 is due to by outside to the right
During perturbed force, main shaft can deviate from equilbrium position and moves right, and so makes left side axial magnetic suspension bearing
Biasing magnetic flux reduces, and axial magnetic suspension bearing biasing magnetic flux in right side increases；Magnetic suspension shaft on the left of Tong Shi
Hold in stator air gap between outer magnetic pole 1 and end thrust dish 2 to increase, magnetic inside and outside the magnetic suspension bearing stator of right side
Between pole and end thrust dish, air gap reduces.Due to when magnetic pole area is certain, the size of magnetic attraction and magnetic flux
Square being directly proportional of amount, right side axial magnetic suspension bearing to rotor main shaft 1 captivation more than left side, if control
During winding no current processed, main shaft 1 does not returns to equilbrium position.Now, if displacement transducer or other class
Type sensor detects this change, and is transferred in controller, then controller through calculating after by this
One signal changeover control signal, power amplifier amplifies control signal and obtains correspondence in controlling winding
Control electric current.This electric current is setting up control after controlling winding in magnetic pole of the stator with end thrust dish air gap
Magnetic field processed.The control magnetic field set up superposes with bias magnetic field, makes left side air-gap flux amount increase, right side
Air-gap flux amount reduces, and makes main shaft 1 be withdrawn into equilbrium position producing a power to the left；In like manner, when
When main shaft is subject to external disturbance to the left, carry degenerative permanent magnet biased axial magnetic suspension bearing by controlling
In winding, electric current regulates the magnetic flux of both sides air gap, makes main shaft remain at equilbrium position.
When there being the quiescent biasing masterpiece used time on rotor main shaft 1, then can make left and right side axial magnetic suspension axle
Hold air gap biasing magnetic flux and have a difference, partly or entirely to offset this quiescent biasing power.If this is quiet
To the right, then left side air gap biasing magnetic flux is more than right side for state bias force；Otherwise, then right side air gap biasing magnetic
Flux is more than left side.Have, identical without the magnetic suspension bearing basic functional principle of quiescent biasing power, all adopt
In being wound by control with carrying degenerative permanent magnet biased axial magnetic suspension bearing, electric current regulates both sides gas
The magnetic flux of gap, makes main shaft 1 remain at equilbrium position.
Claims (4)
1. permanent magnet bias one side axial magnetic suspension bearing, it is characterized in that: include step-like main shaft (1) and the stepped end thrust disc (2) being sleeved on main shaft (1) step surface, and end thrust dish (2) large end face is installed against main shaft (1) step；nullAt upper interior with stepped end thrust disc (2) of main shaft (1)、Stator internal magnetic pole (10) and stator outer magnetic pole (6) it is separately installed with on the position that between outer land terrace is corresponding，Described stator internal magnetic pole (10) is step-like structure，Stator outer magnetic pole (6) is circular ring，And the equal diameters of stator internal magnetic pole (10) and stator outer magnetic pole (6)，A step-like cavity is formed between stator outer magnetic pole (6) and stator internal magnetic pole (10)，Stator internal magnetic pole step-like structure includes a stator internal magnetic pole small stair face，On the end face in described stator internal magnetic pole small stair face, annular permanent magnnet (4) is installed，Control winding (8) is installed in stator outer magnetic pole (6)，It is also equipped with permanent magnet guard shield (3) in annular permanent magnnet (4) outside，Annular non-magnetic pad (7) it is also equipped with stator internal magnetic pole (10) on the face that stator outer magnetic pole (6) contacts.
Permanent magnet bias one side the most according to claim 1 axial magnetic suspension bearing, it is characterised in that: all offer uniform stator outer magnetic pole louvre (5) of several circumferences and stator internal magnetic pole louvre (9) at described stator outer magnetic pole (6) and the outside same radius of stator internal magnetic pole (10).
Permanent magnet bias one side the most according to claim 1 axial magnetic suspension bearing, it is characterized in that: described stator internal magnetic pole (10) leaves gap with the interior step surface of end thrust dish (2), stator outer magnetic pole (6) with the outer step anchor ring of end thrust dish (2), and its gap width is between 0.3～1.5mm；Stator internal magnetic pole (10) radially has gap with main shaft (1), and its gap width is more than or equal to 0.5mm；Stator outer magnetic pole (6) has gap with the radial direction of end thrust dish (2) relatively small cylindrical surface, and its gap is more than or equal to 1.0mm.
4. according to the permanent magnet bias one side axial magnetic suspension bearing described in claim 1,2 or 3, it is characterised in that: described end thrust dish (2), stator internal magnetic pole louvre (9), stator internal magnetic pole (10) they are soft magnetic materials；Main shaft (1), permanent magnet guard shield (3) are non-magnet material；Annular permanent magnnet (4) is rare earth permanent-magnetic material or ferrite permanent-magnet materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410010004.8A CN103758865B (en) | 2014-01-09 | 2014-01-09 | Permanent magnet bias one side axial magnetic suspension bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410010004.8A CN103758865B (en) | 2014-01-09 | 2014-01-09 | Permanent magnet bias one side axial magnetic suspension bearing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103758865A CN103758865A (en) | 2014-04-30 |
| CN103758865B true CN103758865B (en) | 2016-08-17 |
Family
ID=50526156
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410010004.8A Active CN103758865B (en) | 2014-01-09 | 2014-01-09 | Permanent magnet bias one side axial magnetic suspension bearing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103758865B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109058291B (en) * | 2018-08-06 | 2024-06-14 | 珠海格力电器股份有限公司 | Magnetic suspension bearing structure and magnetic suspension motor |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2269862B (en) * | 1992-08-22 | 1996-05-08 | Glacier Metal Co Ltd | Electromagnetic bearing arrangement |
| JPH08128445A (en) * | 1994-11-02 | 1996-05-21 | Hitachi Ltd | Thrust magnetic bearing and centrifugal compressor |
| FR2759434B1 (en) * | 1997-02-10 | 1999-05-07 | Aerospatiale | ROTARY MAGNETIC BEARING WITH ACTIVE CENTERING ALONG THE ROTATION AXIS AND AT LOW COST |
| US6703735B1 (en) * | 2001-11-02 | 2004-03-09 | Indigo Energy, Inc. | Active magnetic thrust bearing |
| CN100406760C (en) * | 2006-11-03 | 2008-07-30 | 北京航空航天大学 | Design method for permanent magnet bias axial magnetic bearing |
| CN100487257C (en) * | 2007-04-26 | 2009-05-13 | 北京航空航天大学 | Permanent-magnetic biased axial magnetic bearing |
-
2014
- 2014-01-09 CN CN201410010004.8A patent/CN103758865B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN103758865A (en) | 2014-04-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100458199C (en) | Permanent magnet biased axial magnetic suspension bearing | |
| CN104201935B (en) | A kind of four-degree-of-freedom magnetically levitated flywheel | |
| CN204186801U (en) | A kind of low power consumption axial hybrid magnetic bearing | |
| CN101581336B (en) | Permanent magnetic offset axial magnetic suspension bearing | |
| CN108591257A (en) | Permanent magnet biased axial magnetic suspension bearing with radial passive suspension force | |
| CN109474090B (en) | Doubly salient permanent magnet motor | |
| CN105864292A (en) | Permanent magnet polarization three-degree-of-freedom magnetic bearing | |
| CN102072249B (en) | Large-bearing-capacity radial magnetic bearing | |
| CN111102234B (en) | Permanent magnet biased magnetic suspension bearing | |
| CN106015331B (en) | A kind of low power consumption permanent magnet biased five degree of freedom integrated magnetic bearing | |
| CN101893038A (en) | Permanent magnet biased axial magnetic bearing | |
| CN106286590B (en) | Permanent magnet biased axial magnetic suspension bearing and centrifugal compressor | |
| CN101526107B (en) | Mixed type axial magnetic bearing with permanent magnet positioned on rotor | |
| CN102562800A (en) | Permanent-magnet-biased axial magnetic bearing | |
| CN104214216A (en) | Four-degree-of-freedom inner rotor magnetic bearing | |
| CN108757731A (en) | A kind of radial-axial Three Degree Of Freedom magnetic bearing of permanent magnet axial magnetized | |
| CN103925291A (en) | Permanent magnet polarization hybrid axial magnetic bearing | |
| CN103939465B (en) | A kind of Simple Freedom Magnetic Bearing | |
| CN105840654B (en) | A kind of permanent magnet bias single-degree-of-freedom axial magnetic bearing | |
| CN101158376B (en) | Magnetic levitation motor bearings structure | |
| CN103296934B (en) | A kind of magnetic suspension motor and rotor magnetic bias weight losing method | |
| CN104154119A (en) | Permanent magnet biased axial-radial magnetic bearing | |
| CN103758865B (en) | Permanent magnet bias one side axial magnetic suspension bearing | |
| CN102647123A (en) | Magnetic-suspension fly wheel and complete-permanent-magnet repellent type magnetic suspension bearing and position detection and air gap control | |
| CN108547868B (en) | Semi-freedom degree radial magnetizing hybrid axial magnetic bearing |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |