CN106594072B - One kind is without thrust disc footpath axial direction integrated permanent-magnet biased magnetic bearing - Google Patents
One kind is without thrust disc footpath axial direction integrated permanent-magnet biased magnetic bearing Download PDFInfo
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- CN106594072B CN106594072B CN201611069235.1A CN201611069235A CN106594072B CN 106594072 B CN106594072 B CN 106594072B CN 201611069235 A CN201611069235 A CN 201611069235A CN 106594072 B CN106594072 B CN 106594072B
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- magnetic
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- thrust disc
- magnetic bearing
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Classifications
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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
- F16C32/044—Active magnetic bearings
- F16C32/0459—Details of the magnetic circuit
Abstract
Without thrust disc footpath axial direction integrated permanent-magnet biased magnetic bearing, by permanent magnet, magnetic guiding loop, radial stator iron core, radial coil, rotor core, annular magnetic pole, axial stator be unshakable in one's determination, axial coil, threaded collar, rotating shaft form.Permanent magnet provides bias magnetic field, and biasing magnetic flux and axial direction control magnetic flux are conducted by annular magnetic pole, and annular magnetic pole and screw thread interannular form annulus gap, and annulus gap length is more than radial air gap length.Magnetic bearing is contributed by 4 magnetic poles of radial stator with differential fashion.Magnetic bearing axial is contributed using threaded collar end face without thrust disc, and threaded collar is compressing rotor core.The existing axially integral magnetic bearing in footpath is axially being contributed using thrust disc, is increased rotor diameter, linear velocity and wind moussing loss, is reduced rotor dynamics margin of safety and critical speed.The present invention is solved the axially integral magnetic bearing in existing footpath and axially contributed the shortcomings that existing using thrust disc, and having reduces loss, improves rotor dynamics margin of safety and the advantages of critical speed.
Description
Technical field
It is particularly a kind of to be biased without thrust disc footpath axial direction integrated permanent-magnet the present invention relates to a kind of non-contact magnetically suspension bearing
Magnetic bearing, can be as the contactless support of rotary part in the plant equipment such as motor, lathe.
Background technology
Applied to the magnetic levitation technology of high-speed rotating machine, often require that magnetic bearing dynamic property is good, reliability is high, especially
During applied to rigid rotator high-speed rotating machine, rotor fundamental frequency height is also required, wind moussing loss is small, as magnetic levitaion motor drives
Turbogenerator of dynamic air blower, compressor and electricity generation system etc..Traditional magnetic suspension system needs to configure two radial directions
Magnetic bearing and an axial magnetic bearing, to constrain the five of rotor frees degree.In order to improve the dynamic of magnetic suspension turbine machinery
Can, efficiency is improved, reduces volume, hoisting power density is, it is necessary to which a radial direction magnetic bearing and an axial magnetic bearing are collected
Into and using permanent magnet as radial and axial offer bias magnetic field, here it is footpath axial direction integrated permanent-magnet biased magnetic bearing, such as
Shown in Fig. 1.The structure to a certain extent, reduces volume, reduces loss, improves rotor fundamental frequency, improves dynamic
State property energy.But it axially contributes by thrust disc, and the external diameter of thrust disc increase rotor, increase wind moussing loss, increase rotor table
Upper thread speed, rotor dynamics margin of safety is reduced, influences rotor dynamic property.
The content of the invention
The technology of the present invention solves problem：Thrust disc be present for existing footpath axial direction integrated permanent-magnet biased magnetic bearing
Deficiency, one kind is proposed without thrust disc footpath axial direction integrated permanent-magnet biased magnetic bearing, the structure can reduce loss, improve rotor forces
Learn margin of safety and rotor dynamic property.
The present invention technical solution be：Without thrust disc footpath axial direction integrated permanent-magnet biased magnetic bearing, by permanent magnet, lead
Magnet ring, radial stator iron core, radial coil, rotor core, annular magnetic pole, axial stator be unshakable in one's determination, axial coil, threaded collar, turns
Axle forms, and permanent magnet is an axial annulus, is magnetized vertically, and permanent magnet is clipped between magnetic guiding loop and annular magnetic pole, is magnetic bearing
Bias magnetic field is provided, and isolates radial and axial control magnetic field, realizes radial and axial control decoupling.Radial stator is unshakable in one's determination with turning
Form radial air gap between sub unshakable in one's determination, permanent magnet bias magnetic flux and axially control magnetic flux is conducted by annular magnetic pole, annular magnetic pole and
Annulus gap is formed between magnetic conduction threaded collar, annulus gap length is more than radial air gap length.Magnetic bearing radial stator bag unshakable in one's determination
Containing 4 magnetic poles, connected between magnetic pole by yoke portion, be wound with radial coil outside magnetic pole, contributed with differential fashion.Magnetic bearing axial
Remove thrust disc, contributed using threaded collar end face, threaded collar is compressing rotor core.Axial stator is unshakable in one's determination and annular magnetic pole it
Between be axial coil, axial stator is unshakable in one's determination to leave certain interval between threaded collar end face, forms axial air-gap.Without thrust disc footpath
Axially integral permanent magnet biased magnetic bearing, it is characterised in that：Axially remove thrust disc, contributed using threaded collar end face.Annular gas
Gap length is 1.5~2.0 times of radial air gap length.Described permanent magnet is an axial annulus, is magnetized vertically.Described footpath
It is that the good electric thin steel sheet magnetic material punching press system of changing of magnetic property forms to stator core and rotor core；Magnetic guiding loop, ring
Shape magnetic pole, axial stator are unshakable in one's determination and threaded collar is using the good material of magnetic property, such as appointing for electrical pure iron, 1J50 or silicon steel
Meaning one kind is made.Axial air-gap length is 1~1.5 times of radial air gap length.
The principle of such scheme is：The present invention removes axial thrust disk, is axially being contributed using threaded collar end face, is introducing ring
Shape magnetic pole, to close permanent magnetic circuit and axial magnetic circuit, the length for designing annulus gap is more than radial air gap.Permanent magnet is magnetic
The radial and axial offer bias magnetic field of bearing, permanent magnetic field pass through magnetic guiding loop, radial stator iron core, radial air gap, radial rotor
Unshakable in one's determination, threaded collar, it is divided into two-way and passes through annulus gap and axial air-gap, then it is unshakable in one's determination by annular magnetic pole and axial stator respectively,
Then convergence is all the way, to form closed-loop path.Electromagnetism magnetic field radial through radial stator is unshakable in one's determination and magnetic guiding loop, radial air gap,
Radial rotor is unshakable in one's determination to form closed-loop path；Electromagnetism magnetic field is axially through axial stator iron core, annular magnetic pole, annulus gap, spiral shell
Line ring, axial air-gap form closed-loop path.In radial air gap, electromagnetism magnetic field caused by permanent magnet bias magnetic field and radial coil is carried out
Superposition produces radial electromagnetic force.In axial air-gap, electromagnetism magnetic field caused by permanent magnet bias magnetic field and axial coil is overlapped production
Raw axial electromagnetic force.Compared to existing footpath axial direction integrated permanent-magnet biased magnetic bearing, the structure eliminates axial thrust disk, carried
Systematic function is risen.The present invention permanent magnetic circuit be：Magnetic flux from permanent magnet N poles, by magnetic guiding loop, radial stator it is unshakable in one's determination,
Radial air gap, rotor core, threaded collar, be divided into two-way and pass through annulus gap and axial air-gap, then respectively by annular magnetic pole and
Axial stator is unshakable in one's determination, and then convergence forms permanent magnet circuit, as shown in Figure 2 all the way, to return to permanent magnet S pole.Electromagnetic circuit is in footpath
To by taking caused magnetic flux after the energization of X positive directions pole coil as an example：Electromagnetism magnetic field by X positive directions magnetic pole of the stator and magnetic guiding loop,
It is divided into three tunnels respectively by X negative directions, Y positive directions and Y negative direction stator core magnetic poles, by three corresponding air gaps of magnetic pole,
Radial rotor iron core is converged to, returning to X positive directions magnetic pole by X positive direction air gaps forms closed-loop path, as shown in Figure 3；Electromagnetism
Magnetic field is in axial magnetic circuit：Electromagnetism magnetic field passes through axial stator iron core, annular magnetic pole, annulus gap, threaded collar, axial air-gap
It is as shown in Figure 4 to return to axial stator iron core magnetic poles composition closed-loop path.
The present invention compared with prior art the advantages of be：The existing axially integral magnetic bearing in footpath is axially using thrust disc
Contribute, thrust disc increases the external diameter of rotor, increases wind moussing loss, increases rotor surface linear velocity, and it is abundant safely to reduce rotor dynamics
Degree, critical speed is reduced, influences rotor dynamic property.The present invention removes the axial thrust disk of the axially integral magnetic bearing in footpath, adopts
Contributed with magnetic conduction threaded collar end face, there is the advantages of reduction loss, raising rotor dynamics margin of safety and rotor dynamic property.
Brief description of the drawings
Fig. 1 is existing in the footpath axial direction integrated permanent-magnet biased magnetic bearing axially contributed using thrust disc；
Fig. 2 is being cut without thrust disc footpath axial direction integrated permanent-magnet biased magnetic bearing permanent magnetic circuit for the technology of the present invention solution
Face figure；
Fig. 3 is the technology of the present invention solution without thrust disc footpath axial direction integrated permanent-magnet biased magnetic bearing radial direction electromagnetism magnetic
Road sectional view；
Fig. 4 is the technology of the present invention solution without thrust disc footpath axial direction integrated permanent-magnet biased magnetic bearing axial magnetic magnetic
Road sectional view；
Embodiment
As shown in Fig. 2 it is the technology of the present invention solution without thrust disc footpath axial direction integrated permanent-magnet biased magnetic bearing, i.e.,
The present invention citation form, it by 1 radial stator iron core of magnetic guiding loop 2,1 of permanent magnet 1,1,3,1 radial direction magnetizing coils 4,
1 axial 9,1 magnetic conduction threaded collar of magnetizing coil of the axial stator iron core 8,1 of annular magnetic pole 7,1 of radial rotor iron core 6,1
11st, 1 armature spindle 13 forms.Annular permanent magnet 1 is clipped between magnetic guiding loop 2 and annular magnetic pole 7, and biasing magnetic is provided for magnetic bearing
, and isolate radial and axial control magnetic field, realize radial and axial control decoupling.Radial stator iron core 3 with rotor core 6 it
Between formed radial air gap 5, permanent magnet bias magnetic flux and axially control magnetic flux conducted by annular magnetic pole 7, annular magnetic pole 7 and magnetic conduction spiral shell
Annulus gap 10 is formed between line ring 11, the length of annulus gap 10 is more than the length of radial air gap 5, and the length of annulus gap 10 is
1.5~2.0 times of the length of radial air gap 5, radial air gap typically between 0.2~0.6 millimeter, annulus gap typically 0.3~
Between 1.2 millimeters.When rotor radial displacement very little, annular magnetic pole 7 is contributed minimum.Magnetic bearing radial stator iron core 3 includes 4
Magnetic pole, connected by yoke portion between magnetic pole, be wound with radial direction magnetizing coil 4 outside magnetic pole, at radial air gap permanent magnet bias magnetic field and
Radially control magnetic field superposition, is contributed with differential fashion.Magnetic bearing axial removes thrust disc, is gone out using the end face of magnetic conduction threaded collar 11
Power, magnetic conduction threaded collar 11 is compressing radial rotor 3 laminations unshakable in one's determination.It is axially to swash between axial stator iron core 8 and annular magnetic pole 7
Magnetic coil 9, certain interval is left between axial stator iron core 8 and the end face of magnetic conduction threaded collar 11, forms axial air-gap 12, permanent magnetism is inclined
Put magnetic field and axially control magnetic field is superimposed at air gap, produce axial electromagnetic force.
Magnetic guiding loop 2, annular magnetic pole 7, axial stator iron core 8 and magnetic conduction threaded collar 11 used in the invention described above technical scheme
It is made of the good material of magnetic property, such as electrical pure iron, various carbon steels, cast iron, cast steel, steel alloy, 1J50 and 1J79
Magnetic material.Radial stator iron core 3 and radial rotor iron core 6 can with the good electric thin steel sheet of magnetic property such as electrical pure iron,
The magnetic material punching press such as electrical steel plate DR510, DR470, DW350, the 1J50 and 1J79 system of changing forms.The material of permanent magnet 1 is
Magnetic property good rare-earth permanent magnet or ferrite permanent magnet, permanent magnet 1 are an axial annulus, are magnetized vertically.It is radially excitatory
Coil 4 and axial magnetizing coil 9 are formed with paint-dipping drying after the electromagnetic wire coiling of well conducting.
Claims (5)
- It is 1. unshakable in one's determination by permanent magnet (1), magnetic guiding loop (2), radial stator without thrust disc footpath axial direction integrated permanent-magnet biased magnetic bearing (3), radial coil (4), rotor core (6), annular magnetic pole (7), axial stator (8) unshakable in one's determination, axial coil (9), threaded collar (11), rotating shaft (13) forms, it is characterised in that：Permanent magnet (1) is clipped between magnetic guiding loop (2) and annular magnetic pole (7), is magnetic bearing Bias magnetic field is provided, and isolates radial and axial control magnetic field, realizes radial and axial control decoupling, radial stator iron core (3) Radial air gap (5) is formed between rotor core (6), permanent magnet bias magnetic flux and axially control magnetic flux pass through annular magnetic pole (7) biography Lead, annulus gap (10) is formed between annular magnetic pole (7) and threaded collar (11), annulus gap (10) length is more than radial air gap (5) length；Magnetic bearing radial stator iron core (3) includes 4 magnetic poles, is connected between magnetic pole by yoke portion, and footpath is wound with outside magnetic pole To coil (4), contributed with differential fashion；Magnetic bearing axial removes thrust disc, is contributed using magnetic conduction threaded collar (11) end face, screw thread Ring (11) is compressing rotor core (3) lamination；It is axial coil (9) between axial stator iron core (8) and annular magnetic pole (7), Axial stator iron core leaves certain interval between (8) and threaded collar (11) end face, forms axial air-gap (12).
- 2. no thrust disc footpath axial direction according to claim 1 integrated permanent-magnet biased magnetic bearing, it is characterised in that：Annular gas Gap (10) length is 1.5~2.0 times of radial air gap (5) length.
- 3. no thrust disc footpath axial direction according to claim 1 integrated permanent-magnet biased magnetic bearing, it is characterised in that：Described Radial stator iron core (3) and radial rotor unshakable in one's determination (6) be the good electric thin steel sheet magnetic material punching press of magnetic property change system and Into, the good electric thin steel sheet magnetic material of described magnetic property be electrical pure iron, electrical steel plate DR510, DR470, DW350,1J50 and 1J79 magnetic material it is any；Magnetic guiding loop (2), annular magnetic pole (7), axial stator (8) unshakable in one's determination and magnetic conduction Threaded collar (11) is made of any one of electrical pure iron, 1J50 or silicon steel.
- 4. no thrust disc footpath axial direction according to claim 1 integrated permanent-magnet biased magnetic bearing, it is characterised in that：Described Permanent magnet (1) is an axial annulus, is magnetized vertically.
- 5. no thrust disc footpath axial direction according to claim 1 integrated permanent-magnet biased magnetic bearing, it is characterised in that：Axial gas Gap (12) length is 1~1.5 times of radial air gap (5) length.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611069235.1A CN106594072B (en) | 2016-11-29 | 2016-11-29 | One kind is without thrust disc footpath axial direction integrated permanent-magnet biased magnetic bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611069235.1A CN106594072B (en) | 2016-11-29 | 2016-11-29 | One kind is without thrust disc footpath axial direction integrated permanent-magnet biased magnetic bearing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106594072A CN106594072A (en) | 2017-04-26 |
| CN106594072B true CN106594072B (en) | 2017-11-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611069235.1A Active CN106594072B (en) | 2016-11-29 | 2016-11-29 | One kind is without thrust disc footpath axial direction integrated permanent-magnet biased magnetic bearing |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107181359B (en) * | 2017-06-15 | 2023-07-25 | 北京昆腾迈格技术有限公司 | Multilayer permanent magnet bias magnetic suspension unit, magnetic suspension motor and household air conditioner |
| CN108869558A (en) * | 2018-01-12 | 2018-11-23 | 至玥腾风科技投资集团有限公司 | A kind of control method of bearing, rotor-support-foundation system and bearing |
| CN108087424A (en) * | 2018-01-20 | 2018-05-29 | 营口万意达智能装备科技有限公司 | A kind of magnetic suspension swivel bearing |
| CN108361279B (en) * | 2018-02-05 | 2019-05-03 | 北京航空航天大学 | Orthogonal magnetic circuit journal axle one magnetic suspension bearing based on symmetrical self-lubricating flexibility auxiliary bearing structure |
| CN108386448B (en) * | 2018-02-05 | 2019-05-07 | 北京航空航天大学 | Orthogonal magnetic circuit radial magnetic bearing based on symmetrical self-lubricating flexibility auxiliary bearing structure |
| CN108547867B (en) * | 2018-03-16 | 2020-09-25 | 江苏大学 | Axial self-loop three-degree-of-freedom spherical hybrid magnetic bearing |
| WO2020217407A1 (en) * | 2019-04-25 | 2020-10-29 | 株式会社島津製作所 | Vacuum pump |
| CN110848253A (en) * | 2019-11-11 | 2020-02-28 | 北京航空航天大学 | Three-degree-of-freedom radial-axial integrated hybrid magnetic bearing |
| CN113048148B (en) * | 2019-12-28 | 2023-09-01 | 坎德拉(深圳)新能源科技有限公司 | Magnetic bearing and rotating mechanism using same |
| CN113285558B (en) * | 2021-04-22 | 2022-04-29 | 东南大学 | Bias magnetic field adjustable force balance type stator permanent magnet motor magnetic bearing |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1277060C (en) * | 2005-01-27 | 2006-09-27 | 北京航空航天大学 | Low power consumption permanent magnet biased internal rotor radial magnetic bearing |
| US20100109463A1 (en) * | 2008-10-31 | 2010-05-06 | University Of Virginia Patent Foundation | Hybrid Five Axis Magnetic Bearing System Using Axial Passive PM Bearing Magnet Paths and Radial Active Magnetic Bearings with Permanent Magnet Bias and Related Method |
| CN102042327B (en) * | 2010-12-29 | 2013-04-17 | 北京奇峰聚能科技有限公司 | Low-power consumption large-bearing capacity permanent-magnet bias mixed radial magnetic bearing |
| CN102072249B (en) * | 2011-01-13 | 2013-05-08 | 北京航空航天大学 | Large-bearing-capacity radial magnetic bearing |
| CN204664156U (en) * | 2015-05-27 | 2015-09-23 | 珠海格力节能环保制冷技术研究中心有限公司 | Permanent magnet biased axial magnetic suspension bearing and centrifugal compressor |
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- 2016-11-29 CN CN201611069235.1A patent/CN106594072B/en active Active
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