CN1651780A - Magnetic suspension bearing system - Google Patents
Magnetic suspension bearing system Download PDFInfo
- Publication number
- CN1651780A CN1651780A CNA200410003262XA CN200410003262A CN1651780A CN 1651780 A CN1651780 A CN 1651780A CN A200410003262X A CNA200410003262X A CN A200410003262XA CN 200410003262 A CN200410003262 A CN 200410003262A CN 1651780 A CN1651780 A CN 1651780A
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- CN
- China
- Prior art keywords
- rotating shaft
- magnet
- magnet assembly
- magnetic bearing
- ringshaped
- 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.)
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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
- F16C32/0408—Passive magnetic bearings
- F16C32/0423—Passive magnetic bearings with permanent magnets on both parts repelling each other
- F16C32/0425—Passive magnetic bearings with permanent magnets on both parts repelling each other for radial load mainly
Abstract
The present invention provides a magnetic bearing system for rotate machine. It utilizes the magnetic repulsive force between the spindle positioned on the rotor of rotate machine and the magnet assembly which is formed by stacking ring magnets and positioned on the spindle-contained spindle hole on the stator seat of rotate machine to provide radial non-contact rigid support for spindle.
Description
Technical field
The invention relates to a kind of bearing arrangement of rotary machine, especially about a kind of magnetic bearing system.
Background technique
In rotary machine now, be commonly used to provide rotating shaft radially the mechanical bearing of upper support and rotating shaft rotary freedom mainly be oil-impregnated bearing (sleeve bearing) and ball bearing (ball bearing).With regard to oil-impregnated bearing, because oil-impregnated bearing institute oil content meeting loss to some extent because the growth of service time or sealing are not good, make the frictional force that contains between oil keeper axle and the rotating shaft increase and then generation high temperature and noise, therefore do not meet the requirement of high-performance rotary machine gradually.As for ball bearing, then because the abrasion situation difference of ball every ball when rolling makes motor have the vibration that can not expect and produce bigger noise when rotation.
Figure 1 shows that the part sectioned view of a conventional fan motor (fan motor) 1, the rotating shaft 111 on its rotor 11 is held by the arbor hole on the stator seat 12 121.As shown in the figure, fan electromotor 1 utilize two ball bearings 13 and 14 retrain rotating shaft 111 in order to restriction rotating shaft 111 at contingent beat (run out) in the radial direction, and then provide rotating shaft 111 support diametrically; And adopt a spring (spring) 15 that rotating shaft 111 support in the axial direction is provided; And utilize a C type clasp (C retaining ring) 16 that rotating shaft 111 is fixed.Yet, because ball bearing 13 and 14 has above-mentioned noise problem, and fan electromotor rotating shaft 111 and ball bearing 13 and 14, spring 15 and C type clasp 16 threes all have and contact and cause in area of contact in the radial direction excessive, therefore fan electromotor will produce great noise and high temperature because of large-area contact friction in the running, and then causes the fan electromotor shortening in 1 life-span easily.
In order to provide rotary machine axially reaching the support that directly makes progress and can reduce mechanical wear and the noise that is produced when it turns round simultaneously such as fan electromotor, and then the life-span of increase rotary machine, the present invention proposes a kind of magnetic bearing system that is used for rotary machine then.
Summary of the invention
The present invention proposes a kind of magnetic bearing system that is used for rotary machine, the magnetic repulsion that its utilization lays respectively between the magnet assembly on the arbor hole that holds rotating shaft on the rotary machine rotor in the rotating shaft and rotary machine stator seat provides rotating shaft contactless rigid support diametrically, and effectively reduce mechanical wear, noise and vibration that is produced when rotary machine turns round and then the working life of improving rotating speed and prolonging rotary machine and bearing arrangement.
Magnetic bearing system proposed by the invention comprises arbor hole, one first magnet assembly, one second magnet assembly and the supporting component of a rotating shaft, in order to hold this rotating shaft.First magnet assembly is installed on the sidewall (side wall) of this rotating shaft, and it comprises a plurality of opposite ringshaped magnets of two ends polarity (polarity) that are accumulation, and the homopolarity of these ringshaped magnets joins.Second magnet assembly is installed on the sidewall of this arbor hole, comprises a plurality of opposite polarity ringshaped magnets in two ends that are accumulation, and the homopolarity of these ringshaped magnets joins.Supporting component is fixedly arranged on this stator seat, in order to this rotating shaft of axially support.
Among one embodiment, a heteropole separating surface of each ringshaped magnet of this first magnet assembly align with a heteropole separating surface of each ringshaped magnet of this second magnet assembly respectively (aligned).
Among another embodiment, this second magnet assembly is offset (shift) distance in the axial direction with respect to this first magnet assembly.
The invention has the advantages that convenient bearing assembling, eliminate rotating shaft and bearing large size friction and caused noise, and working life of prolongation rotary machine and bearing diametrically.
Description of drawings
Fig. 1 is the part sectioned view of a conventional fan motor, shows its bearing arrangement.
Fig. 2 is the part sectioned view of a fan electromotor, shows the embodiment's of first embodiment of the invention magnetic bearing system.
Fig. 3 is the part sectioned view of a fan electromotor, shows the embodiment's of second embodiment of the invention magnetic bearing system.
Fig. 4 is the part sectioned view of a fan electromotor, shows another embodiment's of first embodiment of the invention magnetic bearing system.
Fig. 5 A is the part sectioned view of a fan electromotor, shows third embodiment of the invention one embodiment's magnetic bearing system.
Fig. 5 B is the part sectioned view of a fan electromotor, shows another embodiment's of third embodiment of the invention magnetic bearing system.
Fig. 5 C is the part sectioned view of a fan electromotor, shows the another embodiment's of third embodiment of the invention magnetic bearing system.
Fig. 5 D is the part sectioned view of a fan electromotor, shows the another embodiment's of third embodiment of the invention magnetic bearing system.
Fig. 5 E is the part sectioned view of a fan electromotor, shows the another embodiment's of third embodiment of the invention magnetic bearing system.
Symbol description:
1 fan electromotor
11 rotors
111 rotating shafts
12 stator seats
121 arbor holes
13,14 ball bearings
15 springs
16 C type clasps
2,3,4,4a, 4b magnetic bearing system
21,31,41 rotors
211,311,411,411a, 411b rotating shaft
22,32,42 stator seats
221,321,421 arbor holes
23,24,33,34,43,44 magnet assemblies
231,232,233,241,242,243,331,332,333,334,341,342,343,344,431,432,433,434,441,442,443,444 ringshaped magnets
2311,2321,2331,2411,2421,2431,3311,3321,3331,3341,3411,3421,3431,3441,4311,4321,4331,4341,4411,4421,4431,4441 heteropole separating surfaces
25 axle bushes
26,27,35 zanjon thrust bearings
28,36 C type clasps
29,37 pads
100,200,300,400 ringshaped magnet mating faces
45,45a, 45b, 45c, 45d wear-resistant pad
451 planes
451a, 451b, 451c, 451d curved surface
412 convex surfaces
The 412a plane
The 412b concave curved surface
Embodiment
See also Fig. 2, magnetic bearing system 2 according to an embodiment of first embodiment of the invention is an accumulation type passive type magnetic bearing system, system is made of two magnet assemblies 23 and 24, in order to the radial support power of bearing to be provided, wherein magnet assembly 23,24 is made up of more than one magnetic rings respectively, and magnet assembly 23,24 is divided in the rotating shaft 211 and stator seat 22 of magnetic bearing system 2 in the relative mode of homopolarity.Magnetic rings for example is ringshaped magnet, annular permanent magnnet, is that example describes in the present embodiment with the ringshaped magnet.
Specifically, magnet assembly 23 is fixedly arranged on the sidewall of rotating shaft 211 of rotor 21 of a fan electromotor, is piled up in the homopolarity mode of (the N utmost point and the N utmost point join and/or the S utmost point and the S utmost point join) of joining by the opposite polarity ringshaped magnet 231,232,233 in two ends and forms.An other magnet assembly 24 is fixedly arranged on the sidewall of the arbor hole that holds rotating shaft 211 221 of stator seat 22 of fan electromotor, and also the mode of being joined with homopolarity by ringshaped magnet 241,242,243 is piled up and formed.In addition, magnet assembly 23 and 24 ringshaped magnet are man-to-man correspondence, and magnet assembly 23 and 24 does not contact mutually.
In the present embodiment, the heteropole separating surface of each ringshaped magnet 231,232,233 (being the N utmost point and the separating surface of the S utmost point) 2311,2321,2331 alignd with the heteropole separating surface 2411,2421,2431 of corresponding ringshaped magnet 241,242,243, and also aligns with corresponding ringshaped magnet mating face 300,400 in ringshaped magnet mating face 100,200.In other words, the N utmost point (or S utmost point) that constituted of ringshaped magnet 231,232,233 is positive each other relative with the N utmost point (or S utmost point) that corresponding ringshaped magnet 241,242,243 is constituted.
In addition, the thickness of each ringshaped magnet 231,232,233 of the magnet assembly 23 of present embodiment can be identical as shown in Figure 2, the (not shown) that perhaps differs from one another, the heteropole separating surface 2411,2421,2431 that only need satisfy each ringshaped magnet 241,242,243 of above-mentioned magnet assembly 24 gets final product with the condition that the heteropole separating surface 2311,2321,2331 of the corresponding ringshaped magnet 231,232,233 of magnet assembly 23 aligns.For example the thickness of each ringshaped magnet of magnet assembly 24 is identical with the thickness of the ringshaped magnet of corresponding magnet assembly 23, and particularly, ringshaped magnet 231 and 241, ringshaped magnet 232 and 242, ringshaped magnet 233 and 243 have same thickness respectively.
On the other hand, see also Fig. 4, also can will be positioned at that two ringshaped magnets 241 of outermost of the magnet assembly 24 on arbor hole 221 sidewalls and 243 thickness slightly increase and the 241a and the 243a that become Fig. 4, and separately greater than corresponding ringshaped magnet 231 that is positioned at the magnet assembly 23 on rotating shaft 211 sidewalls and 233 thickness, with the load of the assembly (thrust bearing as described later) that alleviates the power that provides support on the axial direction and compensation because course of working and the issuable error of assembling process.In the case, still align with corresponding ringshaped magnet mating face 300,400 in ringshaped magnet mating face 100,200.
Therefore, with regard to Fig. 2 and embodiment shown in Figure 4, as long as each ringshaped magnet heteropole separating surface that is positioned at the magnet assembly on the rotating shaft sidewall can align with the corresponding ringshaped magnet heteropole separating surface of magnet assembly on being positioned at the arbor hole sidewall, perhaps can align with corresponding ringshaped magnet mating face and get final product in the ringshaped magnet mating face, and be positioned on the rotating shaft sidewall magnet assembly be positioned at the total thickness of the magnet assembly on the arbor hole sidewall and the thickness of each ringshaped magnet can be the same or different.
In addition, magnetic bearing system 2 according to first embodiment of the invention also comprises an axle bush (bush) 25, two zanjon thrust bearings (thrust bearing), 26 and 27, one C type clasp 28 and a pad (shim) 29, as the axially support assembly of magnetic bearing system 2.
The lower surface of zanjon thrust bearing 26 is positioned on the stator seat 22 and upper surface and axle bush 25 adjacency, axle bush 25 is installed in the rotating shaft 211 and between magnet assembly 23 and zanjon thrust bearing 26, zanjon thrust bearing 26 provides an axial force to come diamagnetic rotating shaft 211 towards the moving of stator seat 22 in magnetic bearing system 2, and the gravity of support rotor 21, rotating shaft 211, magnet assembly 23 and axle bush 25.Zanjon thrust bearing 27 is installed on the stator seat 22, and it provides an axial force to resist rotating shaft 211 moving away from stator seat 22 in magnetic bearing system 2.Zanjon thrust bearing 26 and 27 herein all can replace by having other bearing of only piling effect, for example is roller thrust bearing (roller thrust bearing).
Other it is noted that, the upper and lower surface of axle bush 25 separately with magnet assembly 23 and zanjon thrust bearing 26 adjacency, its role is to block the magnetic attraction between magnet assembly 23 and the zanjon thrust bearing 26 and support magnet assembly 23.Just because of this, the axle bush 25 of present embodiment can be by the material that adopts low leading magnetism modulus and suitable supporting component (support element) tool certain rigidity made as gold, copper, silver, carbon, lead or non-magnet material replace.
See also Fig. 3, be the schematic representation of second embodiment of the invention one embodiment's magnetic bearing system 3.Present embodiment is that with the difference of first preferred embodiment configuration relation and axially support assembly between magnet assembly 33 and 34 are different.Below only describe, do not repeat them here about resemblance with regard to the present embodiment and first embodiment's embodiment's different place.
In the present embodiment, magnet assembly 33 upwards is offset a distance L in the axial direction with respect to magnet assembly 34.That is, be positioned at the ringshaped magnet 331 of the magnet assembly 33 on rotating shaft 311 sidewalls, 332,333,334 heteropole separating surface 3311,3321,3331,3341 ringshaped magnets 341 with respect to the magnet assembly 34 on arbor hole 321 sidewalls, 342,343,344 heteropole separating surface 3411,3421,3431,3441 upwards are offset a distance L, in order to do the magnetic force of magnet assembly 33 and 34 in magnetic bearing system 3 for providing an axial force that makes progress to stop move (move down) of rotating shaft 311 towards stator seat 32, and the magnetic attraction between antagonism magnet assembly 33 and the zanjon thrust bearing 35 and the gravity of magnet assembly 33.
In addition, the zanjon thrust bearing 35 of present embodiment is installed on the stator seat 32, resists rotating shaft 311 moving away from stator seat 32 in order to an axial force to be provided in magnetic bearing system 3.Zanjon thrust bearing 35 herein can replace by having other bearing of only piling effect, for example is the roller thrust bearing.Other it is noted that, the employing of only piling bearing of present embodiment with lay respectively at rotating shaft and arbor hole on magnet assembly between configuration relevant.In the present embodiment, because magnet assembly 33 makes magnet assembly 33 relatively last with respect to the skew of magnet assembly 34, so present embodiment just must arrange in pairs or groups, and to adopt a thrust direction be axial downward thrust bearing 35 moving up in the axial direction when preventing rotating shaft 311 rotations.Yet, we can also allow magnet assembly 34 make magnet assembly 33 relatively following with respect to the skew of magnet assembly 33, and moving up in the axial direction when making formed magnetic repulsion contribution one axial downward active force prevent rotating shaft 311 rotations between the two, and further according to the magnetic repulsion effect situation between magnet assembly 33 and 34 adopt can provide auxiliary only pile power only pile bearing, for example thrust bearing of a thrust direction for axially making progress.
It should be noted that with regard to the embodiment of Fig. 3, as long as the heteropole separating surface of magnet assembly 33 and 34 has enough dislocation on same direction.With this understanding, the thickness of the total thickness of magnet assembly 33,34 or each ringshaped magnet can be identical, part is identical or complete difference.In addition, magnet assembly 33,34 also can be made of at least one ringshaped magnet.
See also Fig. 5 A to 5E, the schematic representation of magnetic bearing system 4,4a and the 4b of third embodiment of the invention is shown.Present embodiment different with the various embodiments described above be magnet assembly 44 with respect to magnet assembly 43 upwards be offset in the axial direction a distance L ', and the rotating shaft end is by a moulding convex surface 412, a plane 412a or the concave curved surface 412b of becoming, and utilize and to contact supporting revolving shaft 411,411a and 411b by made wear-resistant pad 45,45a, 45b, 45c and the 45d of the little material of friction factor and rotating shaft 411,411a and 411b end, wherein wear-resistant pad 45,45a and 45b supporting revolving shaft 411, and wear-resistant pad 45c and 45d other supporting revolving shaft 411a and 411b.
These surfaces with terminal wear-resistant pad 45,45a, 45b, 45c and the 45d that contact of rotating shaft 411,411a, 411b be configured to respectively a plane 451, a curvature than the curvature of convex surface 412 be little curved surface 451a and 451b, a curvature than the curvature of plane 412a be big curved surface 451c, and a curvature be big curved surface 451d than the curvature of concave curved surface 412b, it acts on and makes contacting to contacting between rotating shaft 411, rotating shaft 411a and rotating shaft 411b and wear-resistant pad 45,45a, 45b, 45c and the 45d.In addition, convex surface 412, concave curved surface 412b, curved surface 451a and 451b, curved surface 451c and curved surface 451d for example are arc surface, conical surface, parabola, ellipsoid.
Below only describe, do not repeat them here about similarity with regard to the different place of present embodiment and the various embodiments described above.
In the present embodiment, the mode that each magnet assembly 43 and 44 is joined with homopolarity by the opposite polarity ringshaped magnet 431,432,433,434,441,442,443,444 in two ends is respectively piled up and is formed, and the ringshaped magnet of magnet assembly 44 is corresponding one to one with the ringshaped magnet of magnet assembly 43, and magnet assembly 43,44 does not contact mutually.
Specifically, be positioned at the ringshaped magnet 441 of the magnet assembly 44 on arbor hole 421 sidewalls, 442,443,444 heteropole separating surface (being the separating surface of the N utmost point and the S utmost point) 4411,4421,4431,4441 corresponding ringshaped magnets 431 with respect to the magnet assembly 43 on rotating shaft 411 sidewalls, 432,433,434 heteropole separating surface 4311,4321,4331,4341 upwards be offset a distance L ', produce an axial force in order to do the magnetic force of magnet assembly 43 and 44 and resist rotating shaft 411,411a, 411b is moving away from stator seat 42 in magnetic bearing system 4, that is in Fig. 5 A to 5E, this magnetic force stops rotating shaft 411 for a downward axial force is provided, 411a, 411b moves up.
In addition, wear-resistant pad 45,45a, 45b, 45c and the 45d of present embodiment is installed in arbor hole 421 bottoms of stator seat 42, provide an axial force to resist rotating shaft 411 in order to carrying rotating shaft 411,411a, 411b, 411a, 411b move towards stator seat 42 bottoms, and the gravity of support rotor 41, rotating shaft 411,411a, 411b and magnet assembly 43.Mode whereby, can further the axially support assembly that comprises assemblies such as zanjon thrust bearing, clasp and pad in the various embodiments described above be reduced to a wear-resistant pad, and still can provide rotating shaft 411, the enough axially support of 411a, 411b, and needn't worry magnetic bearing system 4,4a, the 4b frictional loss in operation process.
With regard to the embodiment of Fig. 5 A to 5E, as long as the heteropole separating surface dislocation in the axial direction of magnet assembly 43 and 44 is enough to provide rotating shaft 411,411a, 411b support in the axial direction.With this understanding, the thickness of the total thickness of magnet assembly 43,44 or each ringshaped magnet can be identical, part is identical or complete difference.In addition, magnet assembly 43,44 also can be made of at least one ringshaped magnet.
In the various embodiments described above, because magnet assembly 23,24 or 33,34 or 43,44 is all piled up by at least one opposite polarity ringshaped magnet in two ends and is formed, therefore can dispose the ringshaped magnet of suitable number, can produce the large size contact friction that enough radially magnetic repulsions avoid rotating shaft 211 or 311 or 411,411a, 411b directly to make progress between rotating shaft 211 or 311 or 411,411a, 411b and arbor hole 221 or 321 or 421 and allow when rotating, and the beat that is produced diametrically when balance rotating shaft 211 or 311 or 411,411a, 411b running.Again, the present invention only piles bearing 26,27,35 or wear-resistant pad 45,45a, 45b, 45c and the 45d active force on providing axially by zanjon respectively, therefore can reduce the axial vibrations that prevents that even magnetic bearing system 2 or 3 or 4,4a, 4b from can take place in the running.
To sum up, the present invention has utilized the various embodiments described above to encyclopaedize various embodiments of the invention.Yet, have the knack of this operator when being appreciated that, each embodiment of the present invention only is exemplary at this but not is restricted, do not breaking away within connotation of the present invention and the scope, the variation example of each assembly of above-mentioned magnetic bearing system and revise example and be the present invention and contain, the present invention is defined by appending claims.
Claims (11)
1. magnetic bearing system comprises:
One rotating shaft;
One arbor hole is positioned on the stator seat, in order to hold this rotating shaft;
One first magnet assembly is fixedly arranged on the sidewall of this rotating shaft, is made up of the opposite polarity ringshaped magnet at least one two ends;
One second magnet assembly is fixedly arranged on the sidewall of this arbor hole, is made up of the opposite polarity ringshaped magnet at least one two ends; And
One supporting component is fixedly arranged on this stator seat, in order to this rotating shaft of axially support;
Wherein, the ringshaped magnet of this first magnet assembly and the ringshaped magnet of this second magnet assembly are for being corresponding one to one.
2. magnetic bearing as claimed in claim 1 system, wherein on this first magnet assembly on a heteropole separating surface of each ringshaped magnet and this second magnet assembly a heteropole separating surface of corresponding ringshaped magnet align.
3. magnetic bearing as claimed in claim 2 system, wherein this supporting component comprises one first thrust bearing, is fixedly arranged on this stator seat, it provides this rotating shaft of antagonism axial force that moves on the first direction in the axial direction; One second thrust bearing is fixedly arranged on this stator seat, and it provides this rotating shaft of antagonism axial force that moves on the second direction in the axial direction, and this second direction is opposite with this first direction; And a clasp, be installed in this rotating shaft, in order to fix the relative position between this rotating shaft and this arbor hole.
4. magnetic bearing as claimed in claim 3 system, wherein this supporting component also comprises:
One pad is between this first thrust bearing and this clasp.
5. magnetic bearing as claimed in claim 1 system, wherein a heteropole separating surface of each ringshaped magnet upwards is offset a distance with respect to a heteropole separating surface of corresponding ringshaped magnet on this second magnet assembly on this first magnet assembly.
6. magnetic bearing as claimed in claim 5 system, wherein this supporting component comprises a thrust bearing, is fixedly arranged on this stator seat the axial force that it provides this rotating shaft of antagonism to move towards this stator seat in the axial direction; And a clasp, be installed in this rotating shaft, in order to fix the relative position between this rotating shaft and this arbor hole.
7. magnetic bearing as claimed in claim 6 system, wherein this supporting component also comprises:
One pad is between this thrust bearing and this clasp.
8. magnetic bearing as claimed in claim 1 system, wherein a heteropole separating surface of each ringshaped magnet offsets downward a distance with respect to a heteropole separating surface of corresponding ringshaped magnet on this second magnet assembly on this first magnet assembly.
9. magnetic bearing as claimed in claim 8 system, wherein an end of this rotating shaft is become a surface of contact and this supporting component comprises a wear-resistant pad by moulding, and a surface of this wear-resistant pad contacts with this surface of contact, and this wear-resistant pad is to be made by the material of low coefficient of friction.
10. magnetic bearing as claimed in claim 9 system, wherein this surface of contact and this surface be selected from by plane, group that arc surface, conical surface, parabola, ellipsoid constituted one of them.
11. magnetic bearing as claimed in claim 9 system, wherein the curvature of this surface of contact is not equal to this surperficial curvature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200410003262XA CN1651780B (en) | 2004-02-03 | 2004-02-03 | Magnetic suspension bearing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200410003262XA CN1651780B (en) | 2004-02-03 | 2004-02-03 | Magnetic suspension bearing system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1651780A true CN1651780A (en) | 2005-08-10 |
| CN1651780B CN1651780B (en) | 2011-02-09 |
Family
ID=34867556
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200410003262XA Expired - Fee Related CN1651780B (en) | 2004-02-03 | 2004-02-03 | Magnetic suspension bearing system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1651780B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100458198C (en) * | 2006-11-21 | 2009-02-04 | 浙江大学 | Rotor weight self-adaptive type permanent magnet thrust bearing |
| CN101350541B (en) * | 2007-07-18 | 2011-08-31 | 富准精密工业(深圳)有限公司 | Motor bearing structure |
| CN101265946B (en) * | 2007-03-08 | 2014-07-30 | 通用电气公司 | Encapsulated stator assembly and process for making |
| US9052177B2 (en) | 2010-07-21 | 2015-06-09 | Renishaw Plc | Metrology apparatus |
| CN108708904A (en) * | 2018-06-26 | 2018-10-26 | 坎德拉（深圳）科技创新有限公司 | Permanent-magnet bearing |
| CN110185639A (en) * | 2019-05-20 | 2019-08-30 | 宁波生久散热科技有限公司 | Novel magnetically levitated radiator fan |
| WO2020018869A1 (en) * | 2018-07-19 | 2020-01-23 | Alcon Inc. | Radially repulsive magnetic bearing for self-aligning elements of coupled platforms |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04219493A (en) * | 1990-08-10 | 1992-08-10 | Ebara Corp | Turbo-molecular pump |
| CN2419413Y (en) * | 2000-04-10 | 2001-02-14 | 台达电子工业股份有限公司 | Magnetic suspension bearing |
-
2004
- 2004-02-03 CN CN200410003262XA patent/CN1651780B/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100458198C (en) * | 2006-11-21 | 2009-02-04 | 浙江大学 | Rotor weight self-adaptive type permanent magnet thrust bearing |
| CN101265946B (en) * | 2007-03-08 | 2014-07-30 | 通用电气公司 | Encapsulated stator assembly and process for making |
| CN101350541B (en) * | 2007-07-18 | 2011-08-31 | 富准精密工业(深圳)有限公司 | Motor bearing structure |
| US9052177B2 (en) | 2010-07-21 | 2015-06-09 | Renishaw Plc | Metrology apparatus |
| CN108708904A (en) * | 2018-06-26 | 2018-10-26 | 坎德拉（深圳）科技创新有限公司 | Permanent-magnet bearing |
| WO2020018869A1 (en) * | 2018-07-19 | 2020-01-23 | Alcon Inc. | Radially repulsive magnetic bearing for self-aligning elements of coupled platforms |
| US11224540B2 (en) | 2018-07-19 | 2022-01-18 | Alcon Inc. | Radially repulsive magnetic bearing for self-aligning elements of coupled platforms |
| CN110185639A (en) * | 2019-05-20 | 2019-08-30 | 宁波生久散热科技有限公司 | Novel magnetically levitated radiator fan |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1651780B (en) | 2011-02-09 |
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