CN108757731A - A kind of radial-axial Three Degree Of Freedom magnetic bearing of permanent magnet axial magnetized - Google Patents
A kind of radial-axial Three Degree Of Freedom magnetic bearing of permanent magnet axial magnetized Download PDFInfo
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- CN108757731A CN108757731A CN201810702176.XA CN201810702176A CN108757731A CN 108757731 A CN108757731 A CN 108757731A CN 201810702176 A CN201810702176 A CN 201810702176A CN 108757731 A CN108757731 A CN 108757731A
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- radial
- axial
- permanent magnet
- iron core
- rotor
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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
- F16C32/00—Bearings not otherwise provided for
- F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
- F16C32/0406—Magnetic bearings
- F16C32/0408—Passive magnetic bearings
- F16C32/041—Passive magnetic bearings with permanent magnets on one part attracting the other part
- F16C32/0421—Passive magnetic bearings with permanent magnets on one part attracting the other part for both radial and axial load
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
A kind of radial-axial Three Degree Of Freedom magnetic bearing of permanent magnet axial magnetized, including stator and rotor, the rotor is made of shaft, rotor core radial component and rotor core axial component, the stator includes the radial control iron core for being arranged at intervals at rotor core radial part radial outside, and it is symmetrically disposed on two axial control iron cores of radial control iron core both sides, it is provided with radial working gas gap between the radial control iron core and rotor core radial component, radial suspension winding is wound on the radial control iron core；It is connected separately with permanent magnet between the outer and radial control iron core of described two axial control iron cores, edge has been arranged concentrically twice suction disk respectively in inner wall, it has been arranged concentrically control disk between the twice suction disk, axial suspension winding is respectively wound on the twice suction disk.
Description
Technical field
The present invention relates to Three Degree Of Freedom magnetic bearing fields, and in particular to a kind of radial-axial three of permanent magnet axial magnetized from
By degree magnetic bearing.
Background technology
Compared to the mechanical bearing used in conventional motors, magnetic bearing is utilized due to not being in direct contact between rotor
Magnetic suspension force makes rotor suspension to replace the supporting role of conventional mechanical bearings, therefore effectively can solve to go out in mechanical bearing
Existing vibration abrasion, rubs, needs the problems such as lubrication.Its unique design principle of magnetic bearing so that high speed, it is high-precision and true
The career fields such as sky have very high application value and are widely applied foreground.
Patent publication No. CN201410156526, the entitled a kind of patent document and patent disclosure of Three Degree Of Freedom magnetic bearing
Number CN201410461449, three proposed in a kind of entitled patent document of novel shaft-radial three freedom degree mixed magnetic bearing
Degree of freedom hybrid magnetic bearing, stator are made of axial, radial iron core two parts, and rotor is in freely always in the axial direction
Motion state, when rotor generate axial displacement when, permanent magnet provide axialy offset magnetic flux will according to magnetic circuit reluctance minimum principle,
By the side stator shaft orientation iron circuit that all selection axial air-gap reduces, and it is no longer pass through the increased side magnetic of axial air-gap
Road, it is well known that for same size of gaps, due to the use of high performance permanent magnetic materials, the air gap for causing permanent magnet to generate
Magnetic field intensity is very big, and up to 0.8T or higher, and the air-gap field intensity that winding energization generates is smaller, about 0.2T ~ 0.3T,
When suspension control magnetic flux adjusts biasing magnetic flux, side is reduced to 0.5T from 0.8T, and the other side increases to 0.3T from 0T, rotor by
Force direction does not change, can not start so as to cause axial.
Patent publication No. CN201110232913, a kind of entitled radial-axial three-degree-of-freedom,
The structure that axial-radial biases magnetic flux, although solving the problems, such as axial difficulty in starting, its structure are provided using dual permanent-magnet
In two permanent magnets occupy bearing interior space so that winding occupies little space, axially and radially magnetic pole area reduce, production
Raw axially and radially suspending power reduces；Additionally due to the thickness of magnetic separator must be determined according to air gap thickness, it is multiple
The use of magnetism-isolating loop causes complicated, manufacturing process requirement height, price high.
Invention content
The purpose of the present invention is the deficiency for existing Three Degree Of Freedom magnetic bearing, provide it is a kind of it is small, manufacturing process is simple
Single, compact-sized, without coupling, rotor radial part both sides axialy offset magnetic flux is equal always for axial suspension power and radial suspension force
Permanent magnet axial magnetized radial-axial Three Degree Of Freedom magnetic bearing.
The invention is realized by the following technical scheme：
A kind of radial-axial Three Degree Of Freedom magnetic bearing of permanent magnet axial magnetized, including stator and rotor, the rotor by shaft,
Rotor core radial component and rotor core axial component composition, the stator include being arranged at intervals at rotor core radial component
The radial control iron core of radial outside, and two axial control iron cores of radial control iron core both sides are symmetrically disposed on, it is described
It is provided with radial working gas gap between radial control iron core and rotor core radial component, is wound on the radial control iron core
Radial suspension winding；It is connected separately with permanent magnet between the outer and radial control iron core of described two axial control iron cores, it is interior
Along twice suction disk has been arranged concentrically respectively in wall, control disk has been arranged concentrically between the twice suction disk, it is described
It is respectively wound with axial suspension winding on twice suction disk.
The further scheme of the present invention is that the gas length between the control disk and rotor core radial component is more than
Gas length between suction disk and rotor core radial component.
The further scheme of the present invention is that the permanent magnet is the annular permanent magnet of axial charging.
The further scheme of the present invention is that the permanent magnet is made of rare earth permanent-magnetic material or iron oxygen permanent-magnet material.
The advantages of the present invention over the prior art are that：
One, it is provided respectively by the permanent magnet of two axial magnetizeds and axially and radially biases magnetic flux, wherein axialy offset magnetic flux is turning
When son axially shifts, it still can guarantee that rotor radial part arranged on left and right sides axialy offset magnetomotive force is equal always, solve
The problem of magnetic bearing axial difficulty in starting；The interior edge of axial control iron core face rotor core radial part is used is justified by twice suction
" E " shape structure of disk and control disk composition ensures that axial control suspension magnetic flux path is unimpeded, passes through axial suspension winding and axis
Interaction to biasing magnetic flux, realizes the stable suspersion of rotor axial；
Two, coupled problem is not present in radial suspension force and axial suspension power, reduces the difficulty of control, is conducive in high speed situation
Application, be easy to industrial realization；
Three, the middle permanent magnet using two pieces of axial chargings provides static magnetic bias magnetic flux compared with the prior art, what the present invention used
The permanent magnet of two pieces of axial chargings is embedded among radial control iron core, is not take up bearing interior space, increases radial direction and axis
To the space of control winding, axially and radially suspending power can be increased；
Four, " E " shape structure that axial control iron core uses, provides closed path to axial suspension control magnetic flux, is rotor axial
The arranged on left and right sides axialy offset magnetomotive force condition that must satisfy equal always.
Description of the drawings
Fig. 1 is the structure sectional view of the present invention.
Specific implementation mode
A kind of radial-axial Three Degree Of Freedom magnetic bearing of permanent magnet axial magnetized as shown in Figure 1, including stator and rotor,
The rotor is made of shaft 16, rotor core radial component 14 and rotor core axial component 15.
The stator includes the diameter for being arranged at intervals at 14 radial outside of rotor core radial component and forming radial working gas gap
To control iron core 3, and it is symmetrically disposed on the left side axial direction control iron core 1 of 3 both sides of radial control iron core, right side axially control iron
The heart 5；It is wound with radial suspension winding 26 on the radial control iron core 3.
Axially control iron core 1, right side axially control between the outer of iron core 5 and radial control iron core 3 respectively in the left side
It is connected with left side permanent magnet 2, the right side permanent magnet 4 of annular, the left side permanent magnet 2, right side permanent magnet 4 are rare earth permanent-magnetic material
Or the annular permanent magnet of axial charging made of iron oxygen permanent-magnet material, give radial and axial Three Degree Of Freedom to provide biasing magnetic respectively
It is logical；The left side axial direction control iron core 1, right side axially control edge in the inner wall of iron core 5 and have been arranged concentrically the left suction of twice respectively
Disk 6, twice right suction disk 7 are set between the right suction disk of twice 7 with one heart respectively between the left suction disk of the twice 6
Be equipped with left control disk 8, right control disk 9, the left control disk 8, right control disk 9 and rotor core radial component 14 it
Between gas length be more than gas length between left suction disk 6, right suction disk 7 and rotor core radial component 14, institute
It states and is respectively wound with left axle on the left suction disk 6 of twice and the right suction disk of twice 7 to suspending windings 10, right axle to suspending windings
12；The left suction disk 6 of twice, left control disk 8 and left side axial direction iron core 1 and the right suction disk 7 of twice, right control disk 9
" E " shape structure is respectively constituted with right side axial direction iron core 5.
Rotor core radial component 14 and rotor core axial component（15）, left side axial direction iron core 1, right side axial direction iron core 5,
Radial control iron core 3 is made of the good material of axially and radially magnetic property, and left axle is to suspending windings 10, right axial suspension
Winding 12, which is all made of after the electromagnetic coil coiling of well conducting, invades paint and dries.
The left side axial direction iron core 1, left axle control iron core 3, radial suspension winding 26, right side to suspending windings 10, radial direction
Axial iron core 5, right axle laminate in an axial direction to suspending windings 12, left side permanent magnet 2, right side permanent magnet 4.
Suspension theory is：Left side permanent magnet 2 and right side permanent magnet 4 generate left side biasing magnetic flux 20 and right side biasing magnetic respectively
Logical 25 two parts；Left side biases N pole of the magnetic flux 20 from left side permanent magnet 2, divides for left inside biasing through the left suction disk of twice 6
Then magnetic flux 19, left outside 27 two parts of biasing magnetic flux pass through between the left suction disk 6 of twice and rotor core radial part 14 respectively
Left side axial air-gap, rotor core radial component 14, radial working gas gap, radial control iron core 3, return to left side permanent magnet 2
The poles S formed left side closed magnetic circuit.
Right side biases N pole of the magnetic flux 25 from right side permanent magnet 4, divides for right interior biasing magnetic through the right suction disk of twice 7
Logical 23, right outer biasing 24 two parts of magnetic flux, then pass through between the right suction disk 7 of twice and rotor core radial component 14 respectively
Right side axial air-gap, rotor core radial component 14, radial working gas gap, radial control iron core 3, return to right side permanent magnet 4
The poles S formed right side closed magnetic circuit.
Radial suspension winding 26, which is powered, generates radial suspension magnetic flux 28, and radial suspension magnetic flux 28 is by radial control iron core 3
Upside, upside radial air gap, rotor core radial component 14, rotor core axial component 15, downside radial air gap and radial control
3 downside of iron core processed forms closed path；For changing the power of magnetic bearing rotor core radially opposite sides air-gap field, according to existing
Technology, installation radial displacement transducer establishes radial displacement closed-loop control system on stator, keeps gas between stator and rotor radial direction
Gap is uniform, realizes rotor radial stable suspersion；Two groups of left axles are powered to 10, two groups of right axles of suspending windings to suspending windings 12 to be distinguished
Four axial suspension magnetic fluxs are generated, respectively：Left inside axial suspension magnetic flux 17, left outside axial suspension magnetic flux 18, the right side in axially hang
Floating magnetic flux 21, right outer axial suspension magnetic flux 22, four axial suspension magnetic fluxs are used for changing magnetic bearing rotor core axial direction both sides gas
The power in gap magnetic field establishes axial displacement closed-loop control system by installing shaft position sensor on stator, keeps fixed, turns
Air gap is uniform between sub- axial direction, realizes rotor axial stable suspersion.
Claims (4)
1. a kind of radial-axial Three Degree Of Freedom magnetic bearing of permanent magnet axial magnetized, including stator and rotor, the rotor is by turning
Axis（16）, rotor core radial part（14）With rotor core axial part（15）Composition, it is characterised in that：The stator includes interval
It is set to rotor core radial component（14）The radial control iron core in outside（3）, and it is symmetrically disposed on radial control iron core（3）
The axial control iron core of two of both sides, the radial control iron core（3）With rotor core radial component（14）Between be provided with diameter
To working gas gap, the radial control iron core（3）On be wound with radial suspension winding（26）；Described two axial control iron cores
Outer and radial control iron core（3）Between be connected separately with permanent magnet, along being arranged concentrically twice suction disk respectively in inner wall,
Control disk has been arranged concentrically between the twice suction disk, be respectively wound on the twice suction disk axial suspension around
Group.
2. a kind of radial-axial Three Degree Of Freedom magnetic bearing of permanent magnet axial magnetized as described in claim 1, it is characterised in that：
The control disk and rotor core radial component（14）Between gas length be more than suction disk and rotor core radial part
Point（14）Between gas length.
3. a kind of radial-axial Three Degree Of Freedom magnetic bearing of permanent magnet axial magnetized as described in claim 1, it is characterised in that：
The permanent magnet is the annular permanent magnet of axial charging.
4. a kind of radial-axial Three Degree Of Freedom magnetic bearing of permanent magnet axial magnetized as described in claim 1 or 3, feature exist
In：The permanent magnet is made of rare earth permanent-magnetic material or iron oxygen permanent-magnet material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810702176.XA CN108757731A (en) | 2018-06-30 | 2018-06-30 | A kind of radial-axial Three Degree Of Freedom magnetic bearing of permanent magnet axial magnetized |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810702176.XA CN108757731A (en) | 2018-06-30 | 2018-06-30 | A kind of radial-axial Three Degree Of Freedom magnetic bearing of permanent magnet axial magnetized |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108757731A true CN108757731A (en) | 2018-11-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810702176.XA Pending CN108757731A (en) | 2018-06-30 | 2018-06-30 | A kind of radial-axial Three Degree Of Freedom magnetic bearing of permanent magnet axial magnetized |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109340259A (en) * | 2018-12-02 | 2019-02-15 | 迈格钠磁动力股份有限公司 | A kind of permanent-magnet suspension bearing bearing radial and axial load |
| CN109578435A (en) * | 2018-11-26 | 2019-04-05 | 北京航空航天大学 | A kind of precision tracking bracket axial magnetic bearing |
| CN114198403A (en) * | 2021-12-31 | 2022-03-18 | 淮阴工学院 | Five-degree-of-freedom hybrid magnetic bearing |
| CN117307606A (en) * | 2023-09-19 | 2023-12-29 | 淮阴工学院 | Three-degree-of-freedom hybrid magnetic bearing with axial auxiliary excitation and bias magnetic circuit design method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105840654A (en) * | 2016-06-08 | 2016-08-10 | 淮阴工学院 | Permanent magnet bias single-degree-of-freedom axial magnetic bearing |
| CN105864292A (en) * | 2016-06-08 | 2016-08-17 | 淮阴工学院 | Permanent magnet polarization three-degree-of-freedom magnetic bearing |
| CN105864293A (en) * | 2016-06-08 | 2016-08-17 | 淮阴工学院 | Integrated five-degree-of-freedom magnetic levitation motorized spindle |
| CN205663761U (en) * | 2016-06-08 | 2016-10-26 | 淮阴工学院 | Five degrees of freedom of low -power permanent magnet biased integrate magnetic bearing |
| CN106050918A (en) * | 2016-06-08 | 2016-10-26 | 淮阴工学院 | Permanent magnet biased five-degree-of-freedom integrated magnetic suspension supporting system |
-
2018
- 2018-06-30 CN CN201810702176.XA patent/CN108757731A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105840654A (en) * | 2016-06-08 | 2016-08-10 | 淮阴工学院 | Permanent magnet bias single-degree-of-freedom axial magnetic bearing |
| CN105864292A (en) * | 2016-06-08 | 2016-08-17 | 淮阴工学院 | Permanent magnet polarization three-degree-of-freedom magnetic bearing |
| CN105864293A (en) * | 2016-06-08 | 2016-08-17 | 淮阴工学院 | Integrated five-degree-of-freedom magnetic levitation motorized spindle |
| CN205663761U (en) * | 2016-06-08 | 2016-10-26 | 淮阴工学院 | Five degrees of freedom of low -power permanent magnet biased integrate magnetic bearing |
| CN106050918A (en) * | 2016-06-08 | 2016-10-26 | 淮阴工学院 | Permanent magnet biased five-degree-of-freedom integrated magnetic suspension supporting system |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109578435A (en) * | 2018-11-26 | 2019-04-05 | 北京航空航天大学 | A kind of precision tracking bracket axial magnetic bearing |
| CN109578435B (en) * | 2018-11-26 | 2020-11-06 | 北京航空航天大学 | Axial magnetic bearing for precision tracking support |
| CN109340259A (en) * | 2018-12-02 | 2019-02-15 | 迈格钠磁动力股份有限公司 | A kind of permanent-magnet suspension bearing bearing radial and axial load |
| CN109340259B (en) * | 2018-12-02 | 2023-10-27 | 迈格钠磁动力股份有限公司 | Permanent magnet suspension bearing capable of bearing radial and axial loads |
| CN114198403A (en) * | 2021-12-31 | 2022-03-18 | 淮阴工学院 | Five-degree-of-freedom hybrid magnetic bearing |
| CN117307606A (en) * | 2023-09-19 | 2023-12-29 | 淮阴工学院 | Three-degree-of-freedom hybrid magnetic bearing with axial auxiliary excitation and bias magnetic circuit design method |
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Application publication date: 20181106 |