CN106594072B - A non-thrust disc radial and axial integrated permanent magnet bias magnetic bearing - Google Patents
A non-thrust disc radial and axial integrated permanent magnet bias magnetic bearing Download PDFInfo
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 16
- 230000004907 flux Effects 0.000 claims abstract description 10
- 239000000696 magnetic material Substances 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 5
- 229910000976 Electrical steel Inorganic materials 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 238000003475 lamination Methods 0.000 claims description 2
- 238000004080 punching Methods 0.000 claims 1
- 230000005672 electromagnetic field Effects 0.000 description 7
- 230000005284 excitation Effects 0.000 description 6
- 238000005339 levitation Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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- 239000003973 paint Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
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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
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Abstract
Description
技术领域technical field
本发明涉及一种非接触磁悬浮轴承，特别是一种无推力盘径轴向一体化永磁偏置磁轴承，可作为电机、机床等机械设备中旋转部件的无接触支撑。The invention relates to a non-contact magnetic suspension bearing, in particular to a non-thrust disk radial and axial integrated permanent magnet bias magnetic bearing, which can be used as non-contact support for rotating parts in mechanical equipment such as motors and machine tools.
背景技术Background technique
应用于高速旋转机械的磁悬浮技术，往往要求磁轴承动态性能好、可靠性高，特别应用于刚性转子高速旋转机械时，还要求转子一阶频率高，风摩损耗小，如磁悬浮电动机驱动的鼓风机、压缩机以及发电系统的涡轮发电机等。传统的磁悬浮系统需要配置两个径向磁轴承和一个轴向磁轴承，来约束转子的五个自由度。为了提高磁悬浮涡轮机械的动态性能，提高效率，缩小体积，提升功率密度，需要将一个径向磁轴承和一个轴向磁轴承进行集成，并且采用永磁体为径向和轴向提供偏置磁场，这就是径轴向一体化永磁偏置磁轴承，如图1所示。该结构在一定程度上，缩小了体积，减小了损耗，提高了转子一阶频率，提升了动态性能。但其轴向依靠推力盘出力，而推力盘增大转子的外径，增大风摩损耗，增大转子表面线速度，降低转子力学安全裕度，影响转子动态性能。The magnetic levitation technology applied to high-speed rotating machinery often requires good dynamic performance and high reliability of magnetic bearings. Especially when it is applied to rigid rotor high-speed rotating machinery, it also requires high first-order frequency of the rotor and low wind friction loss, such as blowers driven by magnetic levitation motors , compressors, and turbine generators for power generation systems. The traditional magnetic levitation system needs to configure two radial magnetic bearings and one axial magnetic bearing to constrain the five degrees of freedom of the rotor. In order to improve the dynamic performance of magnetic levitation turbomachinery, increase efficiency, reduce volume, and increase power density, it is necessary to integrate a radial magnetic bearing and an axial magnetic bearing, and use permanent magnets to provide bias magnetic fields for the radial and axial directions. This is the radial and axial integrated permanent magnet bias magnetic bearing, as shown in Fig. 1 . To a certain extent, this structure reduces the size and loss, increases the first-order frequency of the rotor, and improves the dynamic performance. However, its axial force depends on the thrust plate, and the thrust plate increases the outer diameter of the rotor, increases the wind friction loss, increases the surface linear velocity of the rotor, reduces the mechanical safety margin of the rotor, and affects the dynamic performance of the rotor.
发明内容Contents of the invention
本发明的技术解决问题是：针对现有径轴向一体化永磁偏置磁轴承存在推力盘的不足，提出一种无推力盘径轴向一体化永磁偏置磁轴承，该结构可以降低损耗，提高转子力学安全裕度和转子动态性能。The technical solution problem of the present invention is: in view of the deficiencies of the thrust disk in the existing radial and axial integrated permanent magnet bias magnetic bearing, a kind of radial and axial integrated permanent magnet bias magnetic bearing without thrust disk is proposed, and this structure can reduce the Loss, improve rotor mechanical safety margin and rotor dynamic performance.
本发明的技术解决方案为：无推力盘径轴向一体化永磁偏置磁轴承，由永磁体、导磁环、径向定子铁心、径向线圈、转子铁心、环形磁极、轴向定子铁心、轴向线圈、螺纹环、转轴组成，永磁体为一轴向圆环，沿轴向充磁，永磁体夹在导磁环和环形磁极之间，为磁轴承提供偏置磁场，并隔离径向和轴向控制磁场，实现径向和轴向控制解耦。径向定子铁心与转子铁心之间形成径向气隙，永磁偏置磁通和轴向控制磁通通过环形磁极传导，环形磁极和导磁螺纹环之间形成环形气隙，环形气隙长度大于径向气隙长度。磁轴承径向定子铁心包含4个磁极，磁极之间通过轭部连接，磁极外绕制有径向线圈，以差动方式出力。磁轴承轴向去掉推力盘，采用螺纹环端面出力，螺纹环用以压紧转子铁心。轴向定子铁心和环形磁极之间为轴向线圈，轴向定子铁心和螺纹环端面之间留有一定间隙，形成轴向气隙。无推力盘径轴向一体化永磁偏置磁轴承，其特征在于：轴向去掉推力盘，采用螺纹环端面出力。环形气隙长度为径向气隙长度的1.5～2.0倍。所述的永磁体为一轴向圆环，沿轴向充磁。所述的径向定子铁心和转子铁心为导磁性能良好的电工薄钢板磁性材料冲压迭制而成；导磁环、环形磁极、轴向定子铁心和螺纹环均采用导磁性能良好的材料，如电工纯铁、1J50或硅钢的任意一种制成。轴向气隙长度为径向气隙长度的1～1.5倍。The technical solution of the present invention is: the radial and axial integrated permanent magnet bias magnetic bearing without thrust disc, which is composed of permanent magnet, magnetic permeable ring, radial stator core, radial coil, rotor core, annular magnetic pole, axial stator core , an axial coil, a threaded ring, and a rotating shaft. The permanent magnet is an axial ring that is magnetized along the axial direction. The permanent magnet is sandwiched between the magnetic conducting ring and the annular magnetic pole to provide a bias magnetic field for the magnetic bearing and isolate the diameter. The magnetic field can be controlled in both direction and axial direction to realize the decoupling of radial and axial control. A radial air gap is formed between the radial stator core and the rotor core, the permanent magnet bias flux and the axial control flux are conducted through the annular magnetic pole, and an annular air gap is formed between the annular magnetic pole and the magnetic thread ring, the length of the annular air gap greater than the radial air gap length. The magnetic bearing radial stator core includes 4 magnetic poles, the magnetic poles are connected through the yoke, the magnetic poles are wound with radial coils, and the force is output in a differential manner. The magnetic bearing removes the thrust plate in the axial direction, and adopts the end face of the threaded ring to output force, and the threaded ring is used to compress the rotor core. There is an axial coil between the axial stator core and the annular magnetic pole, and there is a certain gap between the axial stator core and the end face of the threaded ring to form an axial air gap. The radial and axial integrated permanent magnet bias magnetic bearing without thrust disc is characterized in that the thrust disc is removed in the axial direction, and the end surface of the threaded ring is used to output force. The length of the annular air gap is 1.5 to 2.0 times the length of the radial air gap. The permanent magnet is an axial ring, which is magnetized along the axial direction. The radial stator core and the rotor core are stamped and stacked from electrical thin steel plate magnetic materials with good magnetic properties; the magnetic rings, annular magnetic poles, axial stator cores and threaded rings are all made of materials with good magnetic properties. Such as electrical pure iron, 1J50 or any one made of silicon steel. The axial air gap length is 1 to 1.5 times the radial air gap length.
上述方案的原理是：本发明去掉轴向推力盘，在轴向采用螺纹环端面出力，引入环形磁极，以闭合永磁磁路和轴向控制磁路，设计环形气隙的长度大于径向气隙。永磁体为磁轴承径向和轴向提供偏置磁场，永磁磁场通过导磁环、径向定子铁心、径向气隙、径向转子铁心、螺纹环，分为两路经过环形气隙和轴向气隙，再分别经过环形磁极和轴向定子铁心，然后汇聚为一路，形成闭合回路。电磁磁场在径向通过径向定子铁心和导磁环、径向气隙、径向转子铁心构成闭合回路；电磁磁场在轴向通过轴向定子铁心、环形磁极、环形气隙、螺纹环、轴向气隙构成闭合回路。在径向气隙，永磁偏置磁场和径向线圈产生的电磁磁场进行叠加产生径向电磁力。在轴向气隙，永磁偏置磁场和轴向线圈产生的电磁磁场进行叠加产生轴向电磁力。相比于现有的径轴向一体化永磁偏置磁轴承，该结构去掉了轴向推力盘，提升了系统性能。本发明的永磁磁路为：磁通从永磁体N极出发，通过导磁环、径向定子铁心、径向气隙、转子铁心、螺纹环，分为两路经过环形气隙和轴向气隙，再分别经过环形磁极和轴向定子铁心，然后汇聚为一路，回到永磁体S极，形成永磁回路，如图2所示。电磁磁路在径向以X正方向磁极线圈通电后产生的磁通为例：电磁磁场通过X正方向定子磁极和导磁环、分为三路分别通过X负方向、Y正方向和Y负方向定子铁心磁极，经过三个磁极相应的气隙，汇聚到径向转子铁心，经过X正方向气隙回到X正方向磁极构成闭合回路，如图3所示；电磁磁场在轴向的磁路为：电磁磁场通过轴向定子铁心、环形磁极、环形气隙、螺纹环、轴向气隙回到轴向定子铁心磁极构成闭合回路如图4所示。The principle of the above scheme is: the present invention removes the axial thrust disk, adopts the end face of the threaded ring to output force in the axial direction, and introduces the annular magnetic pole to close the permanent magnet magnetic circuit and the axial control magnetic circuit. The length of the designed annular air gap is greater than that of the radial air gap. Gap. The permanent magnet provides a bias magnetic field for the magnetic bearing in the radial and axial directions. The permanent magnetic field passes through the magnetic ring, the radial stator core, the radial air gap, the radial rotor core, and the threaded ring, and is divided into two paths through the annular air gap and the The axial air gap passes through the annular magnetic pole and the axial stator core respectively, and then converges into one path to form a closed loop. The electromagnetic field passes through the radial stator core, magnetic ring, radial air gap, and radial rotor core in the radial direction to form a closed loop; the electromagnetic field passes through the axial stator core, annular poles, annular air gap, threaded ring, and shaft in the axial direction. A closed loop is formed towards the air gap. In the radial air gap, the permanent magnetic bias magnetic field and the electromagnetic field generated by the radial coil are superimposed to generate radial electromagnetic force. In the axial air gap, the permanent magnetic bias magnetic field and the electromagnetic field generated by the axial coil are superimposed to generate axial electromagnetic force. Compared with the existing radial and axial integrated permanent magnet bias magnetic bearings, this structure removes the axial thrust disc and improves the system performance. The permanent magnetic circuit of the present invention is as follows: the magnetic flux starts from the N pole of the permanent magnet, passes through the magnetic permeable ring, the radial stator core, the radial air gap, the rotor core, and the threaded ring, and is divided into two paths through the annular air gap and the axial direction. The air gap passes through the annular magnetic pole and the axial stator core respectively, and then converges into one path, returning to the S pole of the permanent magnet to form a permanent magnet circuit, as shown in Figure 2. In the radial direction, the electromagnetic magnetic circuit takes the magnetic flux generated by the magnetic pole coil in the positive X direction as an example: the electromagnetic field passes through the stator pole in the positive direction of X and the magnetic conduction ring, and is divided into three paths through the negative direction of X, the positive direction of Y and the negative direction of Y. The magnetic poles of the directional stator core converge to the radial rotor core through the corresponding air gaps of the three magnetic poles, and return to the positive X magnetic poles through the X positive direction air gap to form a closed loop, as shown in Figure 3; the electromagnetic field in the axial direction The way is: the electromagnetic field returns to the axial stator core pole through the axial stator core, annular magnetic pole, annular air gap, threaded ring, and axial air gap to form a closed loop, as shown in Figure 4.
本发明与现有技术相比的优点在于：现有径轴向一体化磁轴承在轴向采用推力盘出力，推力盘增大转子的外径，增大风摩损耗，增大转子表面线速度，降低转子力学安全裕度，降低临界转速，影响转子动态性能。本发明去掉径轴向一体化磁轴承的轴向推力盘，采用导磁螺纹环端面出力，具有降低损耗，提高转子力学安全裕度和转子动态性能的优点。Compared with the prior art, the present invention has the advantages that: the existing radial and axial integrated magnetic bearing adopts a thrust plate to output force in the axial direction, the thrust plate increases the outer diameter of the rotor, increases the wind friction loss, increases the linear velocity of the rotor surface, Reduce the mechanical safety margin of the rotor, reduce the critical speed, and affect the dynamic performance of the rotor. The invention removes the axial thrust plate of the radial and axial integrated magnetic bearing, and adopts the force output of the end face of the magnetically conductive threaded ring, which has the advantages of reducing loss, improving the mechanical safety margin of the rotor and the dynamic performance of the rotor.
附图说明Description of drawings
图1为现有的在轴向采用推力盘出力的径轴向一体化永磁偏置磁轴承；Fig. 1 is an existing radial and axial integrated permanent magnet bias magnetic bearing that uses a thrust disc to output force in the axial direction;
图2为本发明技术解决方案的无推力盘径轴向一体化永磁偏置磁轴承永磁磁路截面图；Fig. 2 is the sectional view of the permanent magnet magnetic circuit of the thrustless disk diameter axially integrated permanent magnet bias magnetic bearing of the technical solution of the present invention;
图3为本发明技术解决方案的无推力盘径轴向一体化永磁偏置磁轴承径向电磁磁路截面图；Fig. 3 is a cross-sectional view of the radial electromagnetic magnetic circuit of the non-thrust disc axially integrated permanent magnet bias magnetic bearing of the technical solution of the present invention;
图4为本发明技术解决方案的无推力盘径轴向一体化永磁偏置磁轴承轴向电磁磁路截面图；Fig. 4 is a sectional view of an axial electromagnetic magnetic circuit of an axially integrated permanent magnet bias magnetic bearing without a thrust disc diameter of the technical solution of the present invention;
具体实施方式detailed description
如图2所示，为本发明技术解决方案的无推力盘径轴向一体化永磁偏置磁轴承，即本发明的基本形式，它由1个永磁体1、1个导磁环2、1个径向定子铁心3、1个径向激磁线圈4、1个径向转子铁心6、1个环形磁极7、1个轴向定子铁心8、1个轴向激磁线圈9、1个导磁螺纹环11、1个转子轴13组成。环形永磁体1夹在导磁环2和环形磁极7之间，为磁轴承提供偏置磁场，并隔离径向和轴向控制磁场，实现径向和轴向控制解耦。径向定子铁心3与转子铁心6之间形成径向气隙5，永磁偏置磁通和轴向控制磁通通过环形磁极7传导，环形磁极7和导磁螺纹环11之间形成环形气隙10，环形气隙10长度大于径向气隙5长度，并且环形气隙10长度为径向气隙5长度的1.5～2.0倍，径向气隙一般在0.2～0.6毫米之间，环形气隙一般在0.3～1.2毫米之间。当转子径向位移很小时，环形磁极7出力极小。磁轴承径向定子铁心3包含4个磁极，磁极之间通过轭部连接，磁极外绕制有径向激磁线圈4，径向气隙处永磁偏置磁场和径向控制磁场叠加，以差动方式出力。磁轴承轴向去掉推力盘，采用导磁螺纹环11端面出力，导磁螺纹环11用以压紧径向转子铁心3叠片。轴向定子铁心8和环形磁极7之间为轴向激磁线圈9，轴向定子铁心8和导磁螺纹环11端面之间留有一定间隙，形成轴向气隙12，永磁偏置磁场和轴向控制磁场在气隙处叠加，产生轴向电磁力。As shown in Figure 2, it is the non-thrust disc axially integrated permanent magnet bias magnetic bearing of the technical solution of the present invention, that is, the basic form of the present invention, which consists of 1 permanent magnet 1, 1 magnetic conducting ring 2, 1 radial stator core 3, 1 radial excitation coil 4, 1 radial rotor core 6, 1 ring pole 7, 1 axial stator core 8, 1 axial excitation coil 9, 1 magnetic conduction Threaded ring 11, 1 rotor shaft 13 forms. The annular permanent magnet 1 is sandwiched between the magnetically permeable ring 2 and the annular magnetic pole 7 to provide a bias magnetic field for the magnetic bearing and isolate the radial and axial control magnetic fields to realize decoupling of the radial and axial control. A radial air gap 5 is formed between the radial stator core 3 and the rotor core 6, the permanent magnet bias flux and the axial control flux are conducted through the annular magnetic pole 7, and an annular air gap is formed between the annular magnetic pole 7 and the magnetic thread ring 11. Gap 10, the length of the annular air gap 10 is greater than the length of the radial air gap 5, and the length of the annular air gap 10 is 1.5 to 2.0 times the length of the radial air gap 5, the radial air gap is generally between 0.2 and 0.6 mm, and the annular air gap The gap is generally between 0.3 and 1.2 mm. When the radial displacement of the rotor is very small, the output force of the annular magnetic pole 7 is extremely small. The radial stator core 3 of the magnetic bearing includes 4 magnetic poles, the magnetic poles are connected by a yoke, and the magnetic poles are wound with a radial excitation coil 4, and the permanent magnetic bias magnetic field and the radial control magnetic field are superimposed at the radial air gap, and the difference is The way to move is to exert effort. The thrust disc is removed in the axial direction of the magnetic bearing, and the end surface of the magnetically conductive threaded ring 11 is used to output force. The magnetically conductive threaded ring 11 is used to compress the radial rotor core 3 laminations. Between the axial stator core 8 and the annular magnetic pole 7 is the axial excitation coil 9, and there is a certain gap between the axial stator core 8 and the end face of the magnetic thread ring 11, forming an axial air gap 12, and the permanent magnetic bias magnetic field and The axial control magnetic field is superimposed at the air gap to generate an axial electromagnetic force.
上述本发明技术方案所用的导磁环2、环形磁极7、轴向定子铁心8和导磁螺纹环11均用导磁性能良好的材料制成，如电工纯铁、各种碳钢、铸铁、铸钢、合金钢、1J50和1J79等磁性材料。径向定子铁心3和径向转子铁心6可用导磁性能良好的电工薄钢板如电工纯铁、电工硅钢板DR510、DR470、DW350、1J50和1J79等磁性材料冲压迭制而成。永磁体1的材料为磁性能良好的稀土永磁体或铁氧体永磁体，永磁体1为一轴向圆环，沿轴向充磁。径向激磁线圈4和轴向激磁线圈9用导电良好的电磁线绕制后浸漆烘干而成。The used magnetic ring 2, annular magnetic pole 7, axial stator core 8 and magnetic threaded ring 11 of the above-mentioned technical scheme of the present invention are all made of materials with good magnetic properties, such as electrical pure iron, various carbon steels, cast iron, Magnetic materials such as cast steel, alloy steel, 1J50 and 1J79. The radial stator core 3 and the radial rotor core 6 can be formed by stamping and stacking magnetic materials such as electrical thin steel plates with good magnetic permeability, such as electrical pure iron, electrical silicon steel plates DR510, DR470, DW350, 1J50 and 1J79. The material of the permanent magnet 1 is a rare earth permanent magnet or a ferrite permanent magnet with good magnetic properties, and the permanent magnet 1 is an axial ring, which is magnetized along the axial direction. The radial excitation coil 4 and the axial excitation coil 9 are formed by winding an electromagnetic wire with good electrical conductivity, dipping in paint and drying.
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.
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| CN201611069235.1A CN106594072B (en) | 2016-11-29 | 2016-11-29 | A non-thrust disc radial and axial integrated permanent magnet bias magnetic bearing |
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| 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 |
| CN108869558B (en) * | 2018-01-12 | 2024-04-02 | 刘慕华 | Bearing, rotor system and control method of 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 |
| CN108386448B (en) * | 2018-02-05 | 2019-05-07 | 北京航空航天大学 | Orthogonal magnetic path-oriented magnetic suspension bearing based on symmetrical self-lubricating flexible auxiliary bearing structure |
| CN108361279B (en) * | 2018-02-05 | 2019-05-03 | 北京航空航天大学 | Orthogonal magnetic path shaft integrated magnetic suspension bearing based on symmetrical self-lubricating flexible 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 |
| CN113224900A (en) * | 2021-05-10 | 2021-08-06 | 鑫磊压缩机股份有限公司 | Magnetic suspension high-speed asynchronous motor without thrust disc |
| CN114165521A (en) * | 2021-11-22 | 2022-03-11 | 重庆高孚透平科技有限公司 | An axial magnetic suspension bearing |
| CN117847087B (en) * | 2024-02-20 | 2025-03-11 | 江苏大学 | Asymmetric thrust-free disk three-degree-of-freedom axial-radial double-piece type hybrid magnetic bearing |
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| CN1277060C (en) * | 2005-01-27 | 2006-09-27 | 北京航空航天大学 | A Low Power Consumption Permanent Magnet Bias Inner 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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