CN101881303B - Permanent magnet offsetting outer rotor radial magnetic bearing with fault-tolerant function - Google Patents
Permanent magnet offsetting outer rotor radial magnetic bearing with fault-tolerant function Download PDFInfo
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- CN101881303B CN101881303B CN2010102263338A CN201010226333A CN101881303B CN 101881303 B CN101881303 B CN 101881303B CN 2010102263338 A CN2010102263338 A CN 2010102263338A CN 201010226333 A CN201010226333 A CN 201010226333A CN 101881303 B CN101881303 B CN 101881303B
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- iron core
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- magnetic pole
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- stator iron
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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
- 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
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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
- F16C2300/00—Application independent of particular apparatuses
- F16C2300/20—Application independent of particular apparatuses related to type of movement
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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
- F16C32/0474—Active magnetic bearings for rotary movement
- F16C32/0487—Active magnetic bearings for rotary movement with active support of four degrees of freedom
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Mechanical Engineering (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
The invention provides a permanent magnet offsetting outer rotor radial magnetic bearing with fault-tolerant function, comprising an outer magnetic conductive ring, a left rotor iron core, a right rotor iron core, a left stator iron core, a right stator iron core, excitation coils, a left inner magnetic conductive ring, a right inner magnetic conductive ring and a permanent magnet, wherein the left rotor iron core and the right rotor iron core are connected with the outer magnetic conductive ring; the interiors of the left stator iron core and the right stator iron core are respectively connected with the left inner magnetic conductive ring and the right inner magnetic conductive ring; the permanent magnet is positioned between the left inner magnetic conductive ring and the right inner magnetic conductive ring; the outside of the left stator iron core and the right stator iron core are respectively provided with the left rotor iron core and the right rotor iron core; an air gap is formed by the outer surface of a stator and the inner surface of a rotor; sixteen magnetic poles are formed by the left stator iron core and the right stator iron core, a pole shoe form is adopted by the stator magnetic poles, and each magnetic pole is wound with one excitation coil; and when one radial magnetic bearing is in normal work, the excitation coils of the other radial magnetic bearing are not electrified, and the other radial magnetic bearing is taken as standby magnetic bearing, so that the whole system can be guaranteed to run safely and reliably.
Description
Technical field
The present invention relates to the hybrid magnetic suspension bearing of a kind of non-contact, particularly relate to a kind of permanent magnet offset external rotor radial magnetic bearing with fault tolerance.
Background technique
Current magnetic suspension bearing is divided into the hybrid magnetic suspension bearing that pure electromagnetic type and permanent magnet bias power up magnetic control system; The former uses, and electric current is big, power consumption is big; Permanent magnet bias powers up the hybrid magnetic suspension bearing of magnetic control system, and electromagnetism magnetic field provides auxiliary adjusting bearing capacity, and main bearing capacity is born in the magnetic field that permanent magnet produces; Has the loss of the power amplifier of reduction; Reduce the electromagnet Number of ampere turns, the advantages such as volume and weight of dwindling magnetic bearing are so the hybrid magnetic suspension bearing of permanent magnet bias has obtained using widely.Require the field of high reliability in aviation etc.; In order to improve the reliability of magnetic levitation bearing system, require to have fault tolerance, and mostly the magnetic suspension bearing that has fault tolerance at present is pure electromagnetic type; Its structural representation is as shown in Figure 1; Used 6 coils on the radial direction magnetic bearing of redundancy feature having, wherein per 3 non-conterminous magnetic poles and coil are formed a radial magnetic bearing, and the radial magnetic bearing of this structure is equivalent to two radial magnetic bearings and works simultaneously; When one of them broke down, another bearing still can proper functioning.Shortcomings such as the radial direction magnetic bearing of this structure produces quiescent biasing magnetic field through electric current, and power consumption is many, volume and weight is big.A kind of permanent magnet offset external rotor radial magnetic bearing (patent No.: 200710063271.1) of patent with redundancy structure; Though said structure can realize redundancy feature; But because there is the fluctuation of the close size of magnetic in a circumferential direction in its air-gap field; Therefore can cause rotor when high speed rotating, to produce bigger eddy current loss, be difficult to satisfy the requirement of space flight power consumption.
Summary of the invention
Technology of the present invention is dealt with problems and is: the deficiency that overcomes existing technology; A kind of permanent magnet offset external rotor radial magnetic bearing with fault tolerance is provided; Compare with the radial direction magnetic bearing of existing fault tolerance, its volume is little, in light weight and low in energy consumption, is easy to control and unfailing performance advantages of higher.
Summary of the invention:
A kind of permanent magnet offset external rotor radial magnetic bearing with fault tolerance; Comprise outer magnetic guiding loop, left rotor iron core, magnetic guiding loop in the sub-iron core of turning right, left stator iron core, right stator iron core, field coil, the left side, right in magnetic guiding loop and permanent magnet; The left rotor iron core links to each other with outer magnetic guiding loop with the sub-iron core of turning right; Left side stator iron core links to each other with right interior magnetic guiding loop with the interior magnetic guiding loop in a left side respectively with right stator iron core radially inner side; Permanent magnet in a left side magnetic guiding loop and right between the magnetic guiding loop, the radial outside of left stator iron core and right stator iron core is respectively left rotor iron core and the sub-iron core of right-hand rotation, forms air gap between the internal surface of the outer surface of left stator iron core and right stator iron core and left rotor iron core and the sub-iron core of turning right; Left side stator iron core and right stator iron core are formed 16 magnetic poles altogether; 8 magnetic poles of left side stator iron core and 8 magnetic poles of right stator iron core evenly distribute along circumference, and all have the pole shoe form, are wound with field coil on each magnetic pole; Mutual non-conterminous 4 magnetic poles of mutual non-conterminous 4 magnetic poles of left side stator iron core and right stator iron core and the coil that is wound with above them have been formed two groups of magnetic pole of the stator jointly; Two groups of magnetic pole of the stator are redundant each other, and when one group of magnetic pole of the stator broke down, another group magnetic pole of the stator can proper functioning.
Distance between the said adjacent stators core magnetic pole pole shoe on the circumferencial direction is 5 times～10 times of said air gap between the stator-rotor iron core, and the pole tip angle of stator pole shoes is 10～30 degree; Described permanent magnet adopts rare earth permanent-magnetic material or ferrite permanent-magnet materials or Nd-Fe-Bo permanent magnet material to process.
A kind of permanent magnet offset external rotor radial magnetic bearing provided by the invention with fault tolerance; The permanent magnet bias magnetic field that permanent magnet provides to magnetic bearing; Bear the suffered radial force of magnetic bearing; Its regulating action of the magnetic field that electromagnetic coil produced is used for changing the power in magnetic field on relative two stator iron core pole orientation, and makes rotor obtain contactless support.Left side stator iron core and right stator iron core are formed 16 magnetic poles altogether; 8 magnetic poles of left side stator iron core and 8 magnetic poles of right stator iron core evenly distribute along circumference; Be wound with field coil on each magnetic pole; Mutual non-conterminous 4 magnetic poles of mutual non-conterminous 4 magnetic poles of left side stator iron core and right stator iron core and the coil that is wound with above them have been formed two groups of magnetic pole of the stator jointly, and whole like this device has been formed two groups of permanent magnet offset external rotor radial magnetic bearings altogether, can realize fault tolerance.When one of them radial direction magnetic bearing proper functioning, the obstructed electric current of the field coil of another radial direction magnetic bearing is as subsequent use magnetic bearing.Set forth the permanent magnetic circuit and the electromagnetic circuit of radial direction magnetic bearing below.
As shown in Figure 2; Solid line is represented permanent magnetic circuit: magnetic flux is from the permanent magnet N utmost point; Get back to the S utmost point of permanent magnet through magnetic guiding loop in magnetic guiding loop, right stator iron core, air gap, the sub-iron core of right-hand rotation, outer magnetic guiding loop, left rotor iron core, air gap, left stator iron core and the left side in right; Constitute the permanent magnetic circuit of radial direction magnetic bearing, in air gap, produce permanent magnet bias magnetic field.Dotted line represent electromagnetic circuit (with+Y ,-the Y direction on coil to switch on simultaneously be that example is explained):
1. magnetic flux is by the magnetic pole of the stator of left stator iron core; Radially through air gap (like+Y direction air gap), left rotor iron core; The stator iron core magnetic pole and the air gap between the rotor (Y direction air gap) of warp and this stator iron core magnetic pole symmetry; Get back to the magnetic pole of the stator of left stator iron core, form closed magnetic loop, shown in dotted line in Fig. 2 and 3;
2. magnetic flux is by the magnetic pole of the stator of right stator iron core; Radially through air gap (like+Y direction air gap), the sub-iron core of turning right; The stator iron core magnetic pole and the air gap between the rotor (Y direction air gap) of warp and this stator iron core magnetic pole symmetry; Get back to the magnetic pole of the stator of right stator iron core, form closed magnetic loop, shown in dotted line in Fig. 2 and 4.Whole device is formed two magnetic bearings radially altogether, and the permanent magnetic circuit of the permanent magnetic circuit of subsequent use radial direction magnetic bearing and electromagnetic circuit and proper functioning radial direction magnetic bearing is identical, and electromagnetic circuit also is divided into two-way.According to this principle, two groups of magnetic poles are redundancy structure each other, and when one of them radial direction magnetic bearing broke down, another subsequent use radial direction magnetic bearing got into normal working state, had guaranteed the operation safely and reliably of whole system.
The advantage of the present invention and existing technology is:
A kind of permanent magnet offset external rotor radial magnetic bearing provided by the invention with fault tolerance; Utilize 16 magnetic pole of the stator and the field coil thereof of left stator iron core and right stator iron core; With magnetic guiding loop in the left side and right interior magnetic guiding loop, permanent magnet, left rotor iron core, turn right sub-iron core and outer magnetic guiding loop; Constituted two radial direction magnetic bearings, had advantages such as easy realization simple in structure with permanent magnet bias of fault tolerance, and when one of them permanent magnet offset radial magnetic bearing breaks down; Another permanent magnet offset radial magnetic bearing will get into normal working state, has guaranteed the operation of the reliable and stable of whole system.In addition, because the pole shoe form is adopted in stator core, the magnetic condensation wave that therefore can reduce air gap between the radial direction magnetic bearing rotor is moving, thereby reduces the rotation power consumption of magnetic bearing.
Description of drawings
The radial direction magnetic bearing structural representation that has fault tolerance in Fig. 1 existing technology;
Fig. 2 the present invention has the permanent magnet offset external rotor radial magnetic bearing sectional drawing of fault tolerance;
Fig. 3 the present invention has the permanent magnet offset external rotor radial magnetic bearing left end sectional view of fault tolerance;
Fig. 4 the present invention has the permanent magnet offset external rotor radial magnetic bearing right-hand member sectional view of fault tolerance;
Embodiment
Below in conjunction with accompanying drawing technological scheme of the present invention is elaborated:
A kind of permanent magnet offset external rotor radial magnetic bearing with fault tolerance; Comprise outer magnetic guiding loop 201, left rotor iron core 202, magnetic guiding loop 207 in turn right sub-iron core 203, left stator iron core 204, right stator iron core 205, field coil 206, the left side, right in magnetic guiding loop 208 and permanent magnet 209; Left rotor iron core 202 links to each other 201 with the sub-iron core 203 of turning right with outer magnetic guiding loop; Left side stator iron core 204 links to each other with right interior magnetic guiding loop 208 with the interior magnetic guiding loop 207 in a left side respectively with right stator iron core 205 radially inner sides; Permanent magnet 209 is in a left side in magnetic guiding loop 207 and the right side between the magnetic guiding loop 208; The radial outside of left side stator iron core 204 and right stator iron core 205 is respectively the left rotor iron core 202 and the sub-iron core 203 of turning right; Form air gap 210 between the internal surface of left side stator iron core 204 and the outer surface and the left rotor iron core 202 of right stator iron core 205 and the sub-iron core 203 of turning right; Left side stator iron core 204 is formed 16 magnetic poles altogether with right stator iron core 205; 8 magnetic poles of left side stator iron core 204 and 8 magnetic poles of right stator iron core 205 evenly distribute along circumference; And be the pole shoe form, be wound with field coil 206 on each magnetic pole, the mutually non-conterminous I ' magnetic pole of the mutually non-conterminous I magnetic pole of left stator iron core 204 301, III magnetic pole 303, V magnetic pole 305 and VII magnetic pole 307 and right stator iron core 205 401, III ' magnetic pole 403, V ' magnetic pole 405 and VII ' magnetic pole 407; The mutually non-conterminous II ' magnetic pole of the mutually non-conterminous II magnetic pole of perhaps left stator iron core 204 302, IV magnetic pole 304, VI magnetic pole 306 and VIII magnetic pole 308 and right stator iron core 205 402, IV ' magnetic pole 404, VI ' magnetic pole 406 and VIII ' magnetic pole 408 and the coil 206 that is wound with above them have been formed two groups of magnetic pole of the stator jointly; Two groups of magnetic pole of the stator are redundant each other, and when one group of magnetic pole of the stator broke down, another group magnetic pole of the stator can proper functioning.
Said stator iron core magnetic pole is the pole shoe form; And the distance between adjacent two stator pole shoes on the circumferencial direction be between the rotor 5 times～10 times of said air gap 210 to prevent the coupling influence between the magnetic pole; General first kind air gap is 0.3mm～0.5mm; So the distance between the stator iron core pole shoe is 1.5～5mm; And pole tip angle (θ shown in the figure) is designed to 10～30 degree to guarantee close uniformity and the unsaturation of stator iron core each several part magnetic, prevents that simultaneously the magnetic of iron core corner from causing saturated defective in intensive.
A kind of permanent magnet offset external rotor radial magnetic bearing provided by the invention with fault tolerance, in outer magnetic guiding loop 201, the left side magnetic guiding loop 207 and right in magnetic guiding loop 208 all adopt the good material of magnetic property to process, like materials such as electrical pure irons; Left rotor iron core 202, turn right sub-iron core 203, left stator iron core 204 and right stator iron core 205 adopt the good electrician's thin slice steel plate of magnetic properties, as magnetic material punching presses such as electrical pure iron, electrical steel plate or silicon steel thin belt repeatedly system form; Permanent magnet 209 can adopt the good rare-earth permanent magnet of magnetic property or ferrite permanent magnet or Nd-Fe-B permanent magnet, and permanent magnet magnetizes vertically, and paint-dipping drying forms after the good electromagnetic wire coiling of field coil 206 usefulness conductions.
The content of not doing in the specification of the present invention to describe in detail belongs to related domain professional and technical personnel's known prior art.
Claims (2)
1. permanent magnet offset external rotor radial magnetic bearing with fault tolerance; Comprise outer magnetic guiding loop (201), left rotor iron core (202), magnetic guiding loop (207) in the sub-iron core (203) of turning right, left stator iron core (204), right stator iron core (205), field coil (206), the left side, right in magnetic guiding loop (208) and permanent magnet (209); Left rotor iron core (202) and the sub-iron core (203) of turning right link to each other with outer magnetic guiding loop (201); Left side stator iron core (204) links to each other with right interior magnetic guiding loop (208) with the interior magnetic guiding loop (207) in a left side respectively with right stator iron core (205) radially inner side; Permanent magnet (209) is positioned between left side magnetic guiding loop (207) and the right magnetic guiding loop (208); The radial outside of left side stator iron core (204) and right stator iron core (205) is respectively the left rotor iron core (202) and the sub-iron core (203) of turning right; Form air gap (210) between the internal surface of the outer surface of left side stator iron core (204) and right stator iron core (205) and left rotor iron core (202) and the sub-iron core (203) of turning right; Left side stator iron core (204) and right stator iron core (205) are formed 16 magnetic poles altogether; 8 magnetic poles of left side stator iron core (204) and 8 magnetic poles of right stator iron core (205) evenly distribute along circumference; And be the pole shoe form; Distance between the adjacent stators core magnetic pole pole shoe on the circumferencial direction is 5 times～10 times of said air gap (210) between the stator-rotor iron core; The pole tip angle of stator pole shoes is 10～30 degree; Be wound with field coil (206) on each magnetic pole; The mutual non-conterminous I magnetic pole (301) of left stator iron core (204), III magnetic pole (303), V magnetic pole (305) and VII magnetic pole (307) and the mutual non-conterminous I ' magnetic pole (401) of right stator iron core (205), III ' magnetic pole (403), V ' magnetic pole (405) and VII ' magnetic pole (407), the mutual non-conterminous II magnetic pole (302) of perhaps left stator iron core (204), IV magnetic pole (304), VI magnetic pole (306) and VIII magnetic pole (308) and the mutual non-conterminous II ' magnetic pole (402) of right stator iron core (205), IV ' magnetic pole (404), VI ' magnetic pole (406) and VIII ' magnetic pole (408) and the coil (206) that is wound with above them have been formed two groups of magnetic pole of the stator jointly, and two groups of magnetic pole of the stator are redundant each other; When one group of magnetic pole of the stator broke down, another group magnetic pole of the stator can proper functioning.
2. according to right 1 described permanent magnet offset external rotor radial magnetic bearing with fault tolerance, it is characterized in that: described permanent magnet (209) adopts rare earth permanent-magnetic material or ferrite permanent-magnet materials or Nd-Fe-Bo permanent magnet material to process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102263338A CN101881303B (en) | 2010-07-09 | 2010-07-09 | Permanent magnet offsetting outer rotor radial magnetic bearing with fault-tolerant function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102263338A CN101881303B (en) | 2010-07-09 | 2010-07-09 | Permanent magnet offsetting outer rotor radial magnetic bearing with fault-tolerant function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101881303A CN101881303A (en) | 2010-11-10 |
| CN101881303B true CN101881303B (en) | 2012-05-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102263338A Expired - Fee Related CN101881303B (en) | 2010-07-09 | 2010-07-09 | Permanent magnet offsetting outer rotor radial magnetic bearing with fault-tolerant function |
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Family Cites Families (7)
| 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 |
| CN1293319C (en) * | 2005-01-27 | 2007-01-03 | 北京航空航天大学 | Low-consumption permanent-magnet offset external rotor radial magnetic bearing |
| CN1279291C (en) * | 2005-04-06 | 2006-10-11 | 北京航空航天大学 | Permanent magnet biased inner rotor radial magnetic bearing |
| CN100451362C (en) * | 2007-01-05 | 2009-01-14 | 北京航空航天大学 | PM offset external rotor radial magnetic bearing with redundant structure |
| CN100451365C (en) * | 2007-04-02 | 2009-01-14 | 北京航空航天大学 | Permanent magnet polarized internal rotor radial magnetic bearing |
| CN101696713B (en) * | 2009-10-15 | 2011-06-22 | 山东科技大学 | Radial magnetic bearing of low-power consumption inner rotor of permanent-magnetic up-attracting and down-repelling structure |
| CN101737425B (en) * | 2010-01-21 | 2011-06-22 | 山东科技大学 | Monostable radial magnetic bearing with low power consumption and zero gravity action |
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2010
- 2010-07-09 CN CN2010102263338A patent/CN101881303B/en not_active Expired - Fee Related
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| CN101881303A (en) | 2010-11-10 |
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Address after: 100075 Beijing City, Dongcheng District Shazikou Road, No. 70 hospital south building three layer Patentee after: Beijing Qifeng Energy Technology Co., Ltd. Address before: 100010 Beijing city Dongcheng District Dongsi before Hanhai Technology Building No. 33 alley six layer Stir-Fried Noodles with Vegetables Patentee before: Beijing Qifeng Energy Technology Co., Ltd. |
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Granted publication date: 20120516 Termination date: 20170709 |