CN102434587A - Permanent-magnetic passive axial magnetic suspension bearing with passive damping effect - Google Patents
Permanent-magnetic passive axial magnetic suspension bearing with passive damping effect Download PDFInfo
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- CN102434587A CN102434587A CN2011102767724A CN201110276772A CN102434587A CN 102434587 A CN102434587 A CN 102434587A CN 2011102767724 A CN2011102767724 A CN 2011102767724A CN 201110276772 A CN201110276772 A CN 201110276772A CN 102434587 A CN102434587 A CN 102434587A
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- 238000013016 damping Methods 0.000 title claims abstract description 72
- 239000000725 suspension Substances 0.000 title claims abstract description 30
- 230000000694 effects Effects 0.000 title claims abstract description 16
- 238000009434 installation Methods 0.000 claims description 27
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 19
- 229910052802 copper Inorganic materials 0.000 claims description 19
- 239000010949 copper Substances 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 18
- 230000005389 magnetism Effects 0.000 claims description 16
- 230000008569 process Effects 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 230000004323 axial length Effects 0.000 claims description 6
- 239000000696 magnetic material Substances 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 238000002161 passivation Methods 0.000 claims description 3
- 230000035699 permeability Effects 0.000 claims description 3
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 3
- 150000002910 rare earth metals Chemical class 0.000 claims description 3
- 229910000859 α-Fe Inorganic materials 0.000 claims description 3
- 230000003068 static effect Effects 0.000 abstract 3
- 241000227287 Elliottia pyroliflora Species 0.000 abstract 1
- 230000002238 attenuated effect Effects 0.000 abstract 1
- 230000010355 oscillation Effects 0.000 abstract 1
- 210000000515 tooth Anatomy 0.000 description 13
- 230000009514 concussion Effects 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000033001 locomotion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
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Abstract
The invention discloses a permanent-magnetic passive axial magnetic suspension bearing with passive damping effect. The magnetic bearing is split, and consists of a static part and a movable part. The static part comprises a stator bearing mounting sleeve, a stator damping mounting sleeve, stator magnetic rings, stator permanent magnets and a stator damping permanent magnet; and the movable part has hollow cup structure, and comprises a rotor shaft, a hollow cup rotor, rotor teeth and a damping copper bush. In the static part, three stator permanent magnets and four stator magnetic rings are sequentially arranged across in the axial direction, arranged on the stator bearing mounting sleeve together and used for providing rigidity for a system. The stator damping permanent magnet consists of three permanent magnets in a Halbach magnetizing mode, arranged on the stator damping mounting sleeve and used for providing damping for the system. According to the magnetic suspension bearing, an axial sensor and a control system are saved, the volume is reduced, the weight is lightened, and the loss is eliminated. Through the passive damping structure of the magnetic suspension bearing, the oscillation of a rotor can be quickly attenuated, and the reliability of the system is improved.
Description
Technical field
The present invention relates to a kind of non-contact magnetically suspension bearing, particularly a kind of permanent magnetism passive type axial magnetic suspension bearing with passive damping effect can be used as the contactless support of rotary component in the machinery such as motor, lathe.
Background technique
Magnetic suspension bearing is divided into active and passive type, and active magnetic suspension bearing is the magnetic suspension bearing that the superposing control coil is produced on the permanent magnet bias basis magnetic field forms, and the passive type magnetic suspension bearing is the magnetic suspension bearing that has only permanent magnetic field to form.Active magnetic suspension bearing can provide the suspension support of stiffness variable and damping, therefore can bear bigger dynamic load, and stronger stability of motions is arranged.But it also has the deficiency of several aspects, and the first must be installed a plurality of sensors higher to required precision, in case a sensor timeliness just can not normally support, thereby reduced the reliability of system; Need high-quality controller and high performance power amplifier at its 2 o'clock, and increased the complexity of system and the possibility of thrashing, also cause the supporting system volume bigger simultaneously.The passive type magnetic bearing does not then need exciting curent, does not need sensor and controller, and is simple and compact for structure.But the passive type magnetic suspension bearing is easy to generate the displacement concussion when supported axial displacement taking place; Influenced the reliability of system; The method that adopts at present is on the basis of passive type magnetic suspension bearing, axially or is radially locating to add an ACTIVE CONTROL coil, and this method can be eliminated the displacement concussion; But this will increase the control controller that initiatively coil current increased, and axially axial sensor will be set in system simultaneously.Halbach magnetic field has the characteristics of field weakening on one side, magnetic field reinforcement on one side.So the passive damping device of employing Halbach magnetic field structure can obtain maximum damping under the identical situation of the permanent-magnet material volume that uses.
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 magnetism passive type axial magnetic suspension bearing with passive damping effect is provided, and this bearing does not have that power consumption, volume are little, in light weight, convenient processing and manufacture, the reliability of system of having improved.
Technical solution of the present invention is: the permanent magnetism passive type axial magnetic suspension bearing with passive damping effect; It is characterized in that: this magnetic bearing is a separate loading; Form by stationary part and moving element; Stationary part links to each other with the standing part of equipment, and moving element links to each other with the rotating part of equipment.Stationary part comprises stator bearing installation sleeve, stator damping installation sleeve, stator magnetic guiding loop, stator permanent magnet, stator damping permanent magnetism; Moving element comprises rotor shaft, drag cup rotor, rotor tooth, damping copper sheathing, and in stationary part, stator permanent magnet intersects vertically with the stator magnetic guiding loop and is arranged in order, and is installed in jointly on the stator bearing installation sleeve; Stator permanent magnet is an axial charging, arranges with the form that homopolarity is relative, and it is inboard that stator damping permanent magnet is positioned at the Bearing Installation cover, forms by the Halbach mode of magnetizing; Be installed on the stator damping installation sleeve, stator damping installation sleeve at one end links to each other with stator bearing installation sleeve, and is installed on the stator jointly; In rotating part, the drag cup rotor is inboard to be the damping copper sheathing, and the drag cup rotor outside is a rotor tooth; The quantity of rotor tooth is consistent with the quantity of stator magnetic guiding loop, and the axial length of each rotor tooth is consistent with the axial length of its corresponding stator magnetic guiding loop, and both align on axial position; The rotor tooth outside is the stator magnetic guiding loop, and both leave certain clearance, forms air gap; Damping copper sheathing inboard is a stator damping permanent magnet, and both also leave certain clearance, forms the damping air gap.It is characterized in that: every thickness difference of stator magnetic guiding loop; Stator magnetic guiding loop thickness between the adjacent stators permanent magnet is 2～6mm, and is the half the of stator magnetic guiding loop thickness between the adjacent stators permanent magnet at the thickness of the stator magnetic guiding loop that links to each other with stator bearing installation sleeve.The thickness of damping copper sheathing is 1～2mm, adopts common fine copper to process through passivation.Stator permanent magnet and stator damping permanent magnet are circle structure, adopt rare earth permanent-magnetic material or ferrite permanent-magnet materials to process.The stator magnetic guiding loop adopts the good material of magnetic property, processes like electrical pure iron.Stator damping installation sleeve, stator bearing installation sleeve adopt the higher non-magnet_conductible material of intensity, process like 1Cr18Ni9Ti.Rotor shaft, drag cup rotor and rotor tooth adopt the higher permeability magnetic material of intensity, process like 40Cr.
Principle of the present invention is: have the permanent magnetism passive type axial magnetic suspension bearing of passive damping effect, utilize the permanent magnet magnetic resistance that axial rigidity is provided, utilize to place the eddy current of magnetic field copper sheet that damping force is provided.Every stator permanent magnet 3 is through the rotor tooth 10 formation closed-loop paths of stator magnetic guiding loop 2, air gap 4 and stator magnetic guiding loop 2 correspondences of its both sides, and is as shown in Figure 2.When rotor receives external disturbance and when producing axial dipole field, thereby axial dipole field appears in every ring stator magnetic guiding loop 2 rotor tooths 10 corresponding with it produces the axial restoring force opposite with the external disturbance force direction in air gap 4, make the rotor retainer shaft to stable.Stator damping permanent magnet 6 is arranged for Halbach, and is through overdamping air gap 7, damping copper sheathing 8 and drag cup rotor 9 formation closed-loop paths, as shown in Figure 2.When concussion appears in rotor axial, stator damping permanent magnet 6 will produce flux change on damping copper sheathing 8, and produce damping current, stop the concussion of rotor, make rotor return to steady state.
The present invention's advantage compared with prior art is: compare with existing active axial magnetic suspension bearing; Save axial sensor, control coil and the needed controller of control coil, dwindled volume, alleviated weight, eliminated loss, improved the reliability of system; Compare with existing passive type axial magnetic suspension bearing, rotor of the present invention adopts cup-shaped structure, makes the damping copper sheathing can be installed on the inwall of cup-shaped rotor; Can bigger damping be provided for system; Save the ACTIVE CONTROL coil, simplified the structure, kept the reliability of system.
Description of drawings
Fig. 1 is the permanent magnetism passive type axial magnetic suspension bearing structural drawing with passive damping effect of the present invention.
Fig. 2 is the permanent magnetism passive type axial magnetic suspension bearing magnetic circuit figure with passive damping effect of the present invention.
Embodiment
Fig. 1 is a citation form of the present invention, and this magnetic bearing is a separate loading, is made up of stationary part and moving element, and stationary part links to each other with the standing part of equipment, and moving element links to each other with the rotating part of equipment.Stationary part comprises 3,3 stator damping permanent magnets 6 of 2,3 stator permanent magnets of 5,4 stator magnetic guiding loops of 1,1 stator damping installation sleeve of 1 stator bearing installation sleeve; Moving element comprises 4,1 damping copper sheathing 8 of 9,4 rotor tooths of 11,1 drag cup rotor of 1 rotor shaft.In stationary part, 3 stator permanent magnets 3 intersect with 4 stator magnetic guiding loops and are arranged in order, and are installed in jointly on the stator bearing installation sleeve 1, and 3 stator permanent magnets 3 all are axial charging, arrange with the form that homopolarity is relative.Stator damping permanent magnet 6 is made up of by the Halbach mode of magnetizing 3 permanent magnets; First permanent magnet is radial magnetizing, and direction is outside the radiation direction, and second permanent magnet is axial charging; Direction upwards; The 3rd permanent magnet is radial magnetizing, and direction is in the radiation direction, and three permanent magnets are installed on the stator damping installation sleeve 5 jointly.Drag cup rotor 9 outsides are 4 rotor tooths 10, and the axial length of each rotor tooth 10 is consistent with the axial length of its corresponding stator magnetic guiding loop 2, and both align on axial position.Stator magnetic guiding loop 2 every thickness differences; Stator magnetic guiding loop 2 thickness between adjacent stators permanent magnet 3 are 2～6mm, and are the half the of stator magnetic guiding loop 2 thickness between the adjacent stators permanent magnet 3 at the thickness of the stator magnetic guiding loop 2 that links to each other with stator bearing installation sleeve 1.Drag cup rotor 9 inboards are damping copper sheathing 8, and thickness is 1～2mm.Rotor tooth 10 outer surfaces that stator magnetic guiding loop 2 internal surfaces are corresponding with it leave certain clearance, form air gap 4, and stator damping permanent magnet 6 outer surfaces and damping copper sheathing 8 internal surfaces also leave certain clearance, form damping air gap 7.
Stator permanent magnet 3 of the present invention is a circle structure with stator damping permanent magnet 6, adopts rare earth permanent-magnetic material or ferrite permanent-magnet materials to process.Stator magnetic guiding loop 2 adopts the good material of magnetic property, processes like electrical pure iron.Stator damping installation sleeve 6, stator bearing installation sleeve 1 adopt the higher non-magnet_conductible material of intensity, process like 1Cr18Ni9Ti.Described rotor shaft 11, drag cup rotor 9 and rotor tooth 10 adopt the higher permeability magnetic material of intensity, process like 40Cr.Damping copper sheathing 8 adopts common fine copper to process through passivation.
Claims (7)
1. have the permanent magnetism passive type axial magnetic suspension bearing of passive damping effect, it is characterized in that: this magnetic bearing is a separate loading, is made up of stationary part and moving element, and stationary part links to each other with the standing part of equipment, and moving element links to each other with the rotating part of equipment; Stationary part comprises stator bearing installation sleeve (1), stator damping installation sleeve (5), stator magnetic guiding loop (2), stator permanent magnet (3), stator damping permanent magnetism (6); Moving element comprises rotor shaft (11), drag cup rotor (9), rotor tooth (10), damping copper sheathing (8), and in stationary part, stator permanent magnet (3) intersects vertically with stator magnetic guiding loop (2) and is arranged in order; Be installed in jointly on the stator bearing installation sleeve (1), stator permanent magnet (3) is an axial charging, arranges with the form that homopolarity is relative; Stator damping permanent magnet (6) is positioned at Bearing Installation cover (1) inboard, forms by the Halbach mode of magnetizing, and is installed on the stator damping installation sleeve (5); Stator damping installation sleeve (5) at one end links to each other with stator bearing installation sleeve (1), and is installed in jointly on the stator, in rotating part; Drag cup rotor (9) is inboard to be damping copper sheathing (8), and drag cup rotor (9) outside is rotor tooth (10), and the quantity of rotor tooth (10) is consistent with the quantity of stator magnetic guiding loop (2); And the axial length of each rotor tooth (10) is consistent with the axial length of its corresponding stator magnetic guiding loop (2), and both align on axial position, and rotor tooth (10) outside is stator magnetic guiding loop (2); Both leave certain clearance, form air gap (4), and damping copper sheathing (8) inboard is a stator damping permanent magnet (6); Both also leave certain clearance, form damping air gap (7).
2. the permanent magnetism passive type axial magnetic suspension bearing with passive damping effect according to claim 1; It is characterized in that: every thickness difference of stator magnetic guiding loop (2); Stator magnetic guiding loop (2) thickness that is positioned between the adjacent stators permanent magnet (3) is 2～6mm, and the thickness that is positioned at the stator magnetic guiding loop (2) that links to each other with stator bearing installation sleeve (1) is the half the of stator magnetic guiding loop (2) thickness between the adjacent stators permanent magnet (3).
3. the permanent magnetism passive type axial magnetic suspension bearing with passive damping effect according to claim 1 is characterized in that: the thickness of damping copper sheathing (8) is 1～2mm, adopts common fine copper to process through passivation.
4. the permanent magnetism passive type axial magnetic suspension bearing with passive damping effect according to claim 1 is characterized in that: stator permanent magnet (3) is a circle structure with stator damping permanent magnet (6), adopts rare earth permanent-magnetic material or ferrite permanent-magnet materials to process.
5. the permanent magnetism passive type axial magnetic suspension bearing with passive damping effect according to claim 1 is characterized in that: stator magnetic guiding loop (2) adopts the good material of magnetic property, processes like electrical pure iron.
6. the permanent magnetism passive type axial magnetic suspension bearing with passive damping effect according to claim 1 is characterized in that: stator damping installation sleeve (5), stator bearing installation sleeve (1) adopt the higher non-magnet_conductible material of intensity, process like 1Cr18Ni9Ti.
7. the permanent magnetism passive type axial magnetic suspension bearing with passive damping effect according to claim 1 is characterized in that: rotor shaft (11), drag cup rotor (9) and rotor tooth (10) adopt the higher permeability magnetic material of intensity, process like 40Cr.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110276772 CN102434587B (en) | 2011-09-19 | 2011-09-19 | Permanent-magnetic passive axial magnetic suspension bearing with passive damping effect |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110276772 CN102434587B (en) | 2011-09-19 | 2011-09-19 | Permanent-magnetic passive axial magnetic suspension bearing with passive damping effect |
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| CN102434587A true CN102434587A (en) | 2012-05-02 |
| CN102434587B CN102434587B (en) | 2013-08-21 |
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| CN 201110276772 Expired - Fee Related CN102434587B (en) | 2011-09-19 | 2011-09-19 | Permanent-magnetic passive axial magnetic suspension bearing with passive damping effect |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103291749A (en) * | 2013-06-14 | 2013-09-11 | 合肥神马科技集团有限公司 | Magnetic bearing pre-magnetizing structure and control system thereof |
| CN103291748A (en) * | 2013-06-14 | 2013-09-11 | 合肥神马科技集团有限公司 | Magnetic bearing structure |
| CN104006079A (en) * | 2014-05-07 | 2014-08-27 | 西安理工大学 | Halbach tapered permanent magnetic bearing comprising permanent magnetic rings having triangular cross sections |
| CN104006078A (en) * | 2014-05-07 | 2014-08-27 | 西安理工大学 | Halbach permanent magnetic bearing obtained by lap piling of permanent magnetic rings having triangular sections |
| CN105048879A (en) * | 2015-05-25 | 2015-11-11 | 哈尔滨工业大学 | Magnetic-circuit-decoupling magnetic-bias active and passive integration radial magnetic suspension bearing |
| CN106438690A (en) * | 2016-07-18 | 2017-02-22 | 中铁二院工程集团有限责任公司 | Coiled axial permanent-magnetic electric magnetic levitation bearing |
| CN106958589A (en) * | 2017-04-20 | 2017-07-18 | 北京航空航天大学 | Halbach permanent magnetism passive type axial magnetic suspension bearings with damping action |
| CN108006069A (en) * | 2017-12-28 | 2018-05-08 | 苏州麦格奈迪磁悬浮技术有限公司 | A kind of magnetic suspension bearing rotor and magnetic suspension rotor system |
| CN108425945A (en) * | 2018-02-12 | 2018-08-21 | 北京航空航天大学 | One kind is based on double level power amplifier permanent magnet biased hybrid magnetic bearing control systems and without gap sensors detection method |
| CN108506343A (en) * | 2018-04-12 | 2018-09-07 | 南京邮电大学 | A kind of mixed type axial magnetic bearing of the axial charging of semi-freedom |
| CN108591256A (en) * | 2018-04-02 | 2018-09-28 | 江苏理工学院 | Permanent-magnet bearing with damping function |
| CN108612752A (en) * | 2018-06-25 | 2018-10-02 | 南京航空航天大学 | Electromagnetic suspension hub-bearing unit |
| CN109281938A (en) * | 2018-12-02 | 2019-01-29 | 迈格钠磁动力股份有限公司 | A kind of permanent-magnet suspension bearing that magnet safeguard structure is set |
| WO2020164371A1 (en) * | 2019-02-14 | 2020-08-20 | 苏州心擎医疗技术有限公司 | Stiffness gain mechanism for magnetic suspension bearing, magnetic suspension bearing, and blood pump |
| CN113530971A (en) * | 2021-07-29 | 2021-10-22 | 哈尔滨工业大学 | Moving coil type self-driven magnetic suspension guide rail device and control method thereof |
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| CN101619746A (en) * | 2008-07-02 | 2010-01-06 | 刘新广 | Nonequilibrium magnetic sliding bearing |
| CN201386741Y (en) * | 2009-05-08 | 2010-01-20 | 刘新广 | Nonequilibrium magnetic levitation bearing |
| CN101807869A (en) * | 2009-02-12 | 2010-08-18 | 卓向东 | Magnetic suspension bearing motor |
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2011
- 2011-09-19 CN CN 201110276772 patent/CN102434587B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1472874A (en) * | 2003-07-15 | 2004-02-04 | 沈阳工业大学 | Passive magnetic suspension brushless D.C. motor |
| WO2008032430A1 (en) * | 2006-09-13 | 2008-03-20 | Ntn Corporation | Motor-integrated magnetic bearing device |
| CN101619746A (en) * | 2008-07-02 | 2010-01-06 | 刘新广 | Nonequilibrium magnetic sliding bearing |
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Cited By (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103291749A (en) * | 2013-06-14 | 2013-09-11 | 合肥神马科技集团有限公司 | Magnetic bearing pre-magnetizing structure and control system thereof |
| CN103291748A (en) * | 2013-06-14 | 2013-09-11 | 合肥神马科技集团有限公司 | Magnetic bearing structure |
| CN103291749B (en) * | 2013-06-14 | 2016-03-30 | 合肥神马科技集团有限公司 | A kind of magnetic suspension bearing pre-magnetizing structure and control system thereof |
| CN103291748B (en) * | 2013-06-14 | 2016-05-11 | 合肥神马科技集团有限公司 | A kind of magnetic bearing structure |
| CN104006079A (en) * | 2014-05-07 | 2014-08-27 | 西安理工大学 | Halbach tapered permanent magnetic bearing comprising permanent magnetic rings having triangular cross sections |
| CN104006078A (en) * | 2014-05-07 | 2014-08-27 | 西安理工大学 | Halbach permanent magnetic bearing obtained by lap piling of permanent magnetic rings having triangular sections |
| CN104006078B (en) * | 2014-05-07 | 2016-04-06 | 西安理工大学 | Adopt the Halbach Permanent-magnet bearing that triangular-section permanent-magnetic clamp stacks |
| CN104006079B (en) * | 2014-05-07 | 2016-04-20 | 西安理工大学 | The Halbach taper Permanent-magnet bearing that triangular-section permanent-magnetic clamp is formed |
| CN105048879A (en) * | 2015-05-25 | 2015-11-11 | 哈尔滨工业大学 | Magnetic-circuit-decoupling magnetic-bias active and passive integration radial magnetic suspension bearing |
| CN106438690B (en) * | 2016-07-18 | 2018-08-14 | 中铁二院工程集团有限责任公司 | A kind of electronic magnetic bearing of coil type axial permanent magnetic |
| CN106438690A (en) * | 2016-07-18 | 2017-02-22 | 中铁二院工程集团有限责任公司 | Coiled axial permanent-magnetic electric magnetic levitation bearing |
| CN106958589A (en) * | 2017-04-20 | 2017-07-18 | 北京航空航天大学 | Halbach permanent magnetism passive type axial magnetic suspension bearings with damping action |
| CN108006069A (en) * | 2017-12-28 | 2018-05-08 | 苏州麦格奈迪磁悬浮技术有限公司 | A kind of magnetic suspension bearing rotor and magnetic suspension rotor system |
| CN108425945B (en) * | 2018-02-12 | 2019-10-25 | 北京航空航天大学 | One kind is based on double level power amplifier permanent magnet biased hybrid magnetic bearing control systems and without gap sensors detection method |
| CN108425945A (en) * | 2018-02-12 | 2018-08-21 | 北京航空航天大学 | One kind is based on double level power amplifier permanent magnet biased hybrid magnetic bearing control systems and without gap sensors detection method |
| CN108591256A (en) * | 2018-04-02 | 2018-09-28 | 江苏理工学院 | Permanent-magnet bearing with damping function |
| CN108591256B (en) * | 2018-04-02 | 2019-08-27 | 江苏理工学院 | Permanent-magnet bearing with damping function |
| CN108506343A (en) * | 2018-04-12 | 2018-09-07 | 南京邮电大学 | A kind of mixed type axial magnetic bearing of the axial charging of semi-freedom |
| CN108612752A (en) * | 2018-06-25 | 2018-10-02 | 南京航空航天大学 | Electromagnetic suspension hub-bearing unit |
| CN109281938A (en) * | 2018-12-02 | 2019-01-29 | 迈格钠磁动力股份有限公司 | A kind of permanent-magnet suspension bearing that magnet safeguard structure is set |
| CN109281938B (en) * | 2018-12-02 | 2023-10-24 | 迈格钠磁动力股份有限公司 | Permanent magnet suspension bearing with magnet protection structure |
| WO2020164371A1 (en) * | 2019-02-14 | 2020-08-20 | 苏州心擎医疗技术有限公司 | Stiffness gain mechanism for magnetic suspension bearing, magnetic suspension bearing, and blood pump |
| US12044271B2 (en) | 2019-02-14 | 2024-07-23 | Magassist, Inc. | Stiffness gain mechanism for magnetic suspension bearing, magnetic suspension bearing, and blood pump |
| CN113530971A (en) * | 2021-07-29 | 2021-10-22 | 哈尔滨工业大学 | Moving coil type self-driven magnetic suspension guide rail device and control method thereof |
| CN113530971B (en) * | 2021-07-29 | 2022-02-08 | 哈尔滨工业大学 | Moving coil type self-driven magnetic suspension guide rail device and control method thereof |
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