WO2020082615A1 - 混合式磁悬浮止推轴承 - Google Patents

混合式磁悬浮止推轴承 Download PDF

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Publication number
WO2020082615A1
WO2020082615A1 PCT/CN2019/070666 CN2019070666W WO2020082615A1 WO 2020082615 A1 WO2020082615 A1 WO 2020082615A1 CN 2019070666 W CN2019070666 W CN 2019070666W WO 2020082615 A1 WO2020082615 A1 WO 2020082615A1
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iron core
thrust bearing
magnetic levitation
hybrid magnetic
bearing according
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PCT/CN2019/070666
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English (en)
French (fr)
Inventor
苏久展
张小波
张芳
龚高
张超
李欣
董如昊
刘鹏辉
邓明星
王飞
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珠海格力电器股份有限公司
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Publication of WO2020082615A1 publication Critical patent/WO2020082615A1/zh

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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

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  • the present application belongs to the technical field of bearings, and specifically relates to a hybrid magnetic levitation thrust bearing.
  • Magnetic suspension bearings use magnetic force to suspend the rotor in the air, so that there is no mechanical contact between the rotor and the stator.
  • the principle is that the magnetic induction line is perpendicular to the magnetic suspension line, and the shaft core is parallel to the magnetic suspension line, so the weight of the rotor is fixed on the running track, and the almost unloaded shaft core is propped in the direction of the anti-magnetic suspension line to form the entire
  • the rotor is suspended on a fixed running track.
  • the rotor can run to a high speed, with low mechanical wear, low energy consumption, low noise, long life, no lubrication, and no oil pollution And other advantages, especially suitable for high-speed, vacuum, ultra-clean and other special environments.
  • an energy-saving permanent magnet bias magnetic bearing is disclosed.
  • This energy-saving permanent magnet bias magnetic bearing is respectively provided with a radial control coil and an axial control coil to perform an electromagnetic magnetic circuit.
  • the permanent magnet magnetic circuit is provided with an axial stator, a radial stator, an outer ring, and a positioning aluminum ring is used for the axial positioning of the radial stator and the permanent magnet.
  • the technical problem to be solved by the present application is to provide a hybrid magnetic levitation thrust bearing, which can reduce the bearing size and reduce the production cost.
  • the present application provides a hybrid magnetic levitation thrust bearing, which includes a ring-shaped middle iron core and outer iron cores provided at both ends of the middle iron core. An end of the outer iron core facing the middle iron core is provided with an annular groove. Excitation windings are respectively arranged in each annular groove, and a permanent magnet is embedded in the middle iron core.
  • the outer iron core is symmetrically arranged at both ends of the middle iron core; and / or the excitation winding is symmetrically arranged at both ends of the middle iron core.
  • the excitation winding is fixedly arranged on the outer core; or, the excitation winding is fixedly arranged on the middle core.
  • the longitudinal section of the outer core is C-shaped.
  • the excitation winding includes a winding skeleton and an excitation coil, and the excitation coil is wound on the winding skeleton.
  • the winding skeleton is fixedly arranged on the outer iron core; or, the winding skeleton is fixedly arranged on the middle iron core.
  • a filling layer is provided between the winding skeleton and the outer iron core.
  • the filling layer is epoxy resin or thermal grease.
  • a filling layer is provided between the permanent magnet and the middle iron core.
  • the filling layer is epoxy resin.
  • the hybrid magnetic suspension thrust bearing further includes a thrust structure, the thrust structure is sleeved in the middle iron core, the outer iron cores are located on both sides of the thrust structure, and the thrust structure is formed by the outer iron core to form a shaft Toward stop.
  • the permanent magnet is fan-shaped or rectangular.
  • the hybrid magnetic levitation thrust bearing provided by the present application includes a ring-shaped middle iron core and outer iron cores arranged at both ends of the middle iron core.
  • An end groove of the outer iron core facing the middle iron core is provided with an annular groove.
  • An excitation winding is provided, and a permanent magnet is embedded in the middle iron core.
  • the hybrid magnetic levitation thrust bearing forms an annular groove on the outer iron core, and the excitation winding is arranged in the annular groove, and at the same time, the permanent magnet is embedded in the middle iron core, the structure is simpler, and the implementation method is also easier. Making full use of the available space of the outer iron core and the middle iron core, the overall structure of the bearing is more compact, which can greatly reduce the bearing size in the axial and radial directions and reduce the production cost.
  • FIG. 1 is a schematic structural diagram of a hybrid magnetic suspension thrust bearing according to an embodiment of the present application.
  • FIG. 2 is a structural diagram of a magnetic circuit of a hybrid magnetic suspension thrust bearing according to an embodiment of the present application
  • FIG. 3 is an exploded schematic view of the structure of the outer core of the hybrid magnetic levitation thrust bearing and the excitation winding of the embodiment of the present application;
  • FIG. 4 is a first cooperation structure diagram of the middle iron core and the thrust structure of the hybrid magnetic levitation thrust bearing according to an embodiment of the present application;
  • FIG. 5 is a second cooperation structure diagram of the middle iron core and the thrust structure of the hybrid magnetic levitation thrust bearing according to an embodiment of the present application;
  • FIG. 6 is an exploded structural view of a hybrid magnetic levitation thrust bearing according to an embodiment of the present application.
  • the hybrid magnetic levitation thrust bearing includes a ring-shaped middle iron core 1 and outer iron cores 2 disposed at both ends of the middle iron core 1, the outer iron core 2 facing toward An annular groove 3 is provided at one end of the iron core 1, and an excitation winding is respectively provided in each annular groove 3, and a permanent magnet 4 is embedded in the middle iron core 1.
  • the hybrid magnetic levitation thrust bearing forms an annular groove 3 on the outer iron core 2, and the excitation winding is arranged in the annular groove 3, and at the same time, the permanent magnet 4 is embedded in the middle iron core 1, the structure is simpler and the implementation method It is also easier, making full use of the available space of the outer iron core 2 and the middle iron core 1, making the overall structure of the bearing more compact, which can greatly reduce the bearing size in the axial and radial directions and reduce the production cost.
  • the outer iron core 2 is symmetrically arranged at both ends of the middle iron core 1.
  • the excitation winding is symmetrically arranged at both ends of the middle iron core 1.
  • the outer iron core 2 and the excitation winding are symmetrically disposed at both ends of the middle iron core 1, specifically, the outer iron core 2 and the excitation winding are both two, and are both about the middle of the middle iron core 1
  • the split plane is symmetrical, wherein the center split plane of the center core 1 is perpendicular to the center axis of the center core 1 and bisects the center core 1 in the axial direction.
  • the symmetrical outer core 2 and the excitation winding are formed at both ends of the middle iron core 1, which can form a more balanced magnetic circuit, effectively improve the magnetic circuit stability of the hybrid magnetic suspension thrust bearing, and improve the hybrid magnetic suspension thrust bearing Working performance.
  • the excitation winding may be fixedly arranged on the outer iron core 2 or may be fixedly arranged on the middle iron core 1, which may be specifically set according to needs.
  • the longitudinal cross-section of the outer iron core 2 is C-shaped, which makes it easier to arrange the excitation winding in the outer iron core 2, and is more conducive to forming a complete magnetic circuit and has better magnetic performance.
  • the winding frame 5 can be fixedly arranged on the outer core 2.
  • the excitation winding includes a winding bobbin 5 and an excitation coil 6, and the excitation coil 6 is wound on the winding bobbin 5.
  • first wrap the excitation coil 6 on the winding frame 5 soak the entire winding winding of the wound winding with insulating paint and dry it to improve the insulation of the winding, and tighten the excitation coil 6
  • the excitation coil 6 On the winding frame 5, it is ensured that the excitation coil 6 will not be loosened or loosened, and then the excitation winding which has been completely immersed in paint is fixed on the outer iron core 2 through the fastening screw 8 to form an outer iron core assembly.
  • the excitation winding fixed on the outer iron core 2 can also play a good magnetic isolation effect, which can reduce the magnetic leakage of the permanent magnetic circuit, thereby improving the working performance of the hybrid magnetic suspension thrust bearing.
  • the winding frame 5 can also be symmetrically fixed at both ends of the middle iron core 1 so as to form a large assembly with the middle iron core 1 and then assembled with the two outer iron cores 2.
  • a filling layer is provided between the winding frame 5 and the outer core 2.
  • the filling layer is epoxy resin or thermal grease.
  • filling different materials between the winding frame 5 and the outer core 2 can improve the performance of the bearing.
  • filling epoxy resin and other materials between the two can strengthen the strength of the outer iron core assembly and ensure that the excitation winding will not break or loose under severe vibration or shock. Its own vibration will also be improved; when operating in a higher temperature environment, it can be filled with heat dissipating silicone grease and other substances to improve its heat dissipation and cooling effect.
  • a filling layer is provided between the permanent magnet 4 and the middle iron core 1, the filling layer can fix the permanent magnet 4 more firmly in the permanent magnet groove of the middle iron core 1, thereby improving the entire hybrid magnetic levitation thrust bearing Vibration and noise.
  • the filling layer is, for example, epoxy resin.
  • the hybrid magnetic levitation thrust bearing further includes a thrust structure 7, the thrust structure 7 is sleeved in the middle iron core 1, the outer iron cores 2 are located on both sides of the thrust structure 7 respectively, and the thrust structure is opposed by the outer iron core 2 7 Form an axial stop.
  • the radially outer edge of the outer iron core 2 is flush with the middle iron core 1, and the radially inner edge of the outer iron core 2 exceeds the radially inner edge of the middle iron core 1, thereby making the outer iron core 2
  • the radial inner edge can cooperate with the thrust structure 7 to form an axial stop structure.
  • the axial length of the thrust structure 7 is slightly smaller than the axial length of the middle iron core 1, so that the thrust structure 7 is completely located in the middle iron core 1, which can effectively avoid the two ends of the thrust structure 7 and the middle iron core 1 Contact occurs between the outer iron cores 2, thereby acting as an effective magnetic levitation thrust.
  • the permanent magnet 4 provides a permanent magnetic field (bias magnetic field) for the entire bearing.
  • the permanent magnetic field can form a permanent magnetic circuit through the permanent magnet 4, the outer iron core 2, the middle iron core 1 and the thrust structure 7 on the excitation coil 6
  • the control magnetic field is generated after the current is applied, and the permanent magnetic circuit and the control magnetic field act on the thrust structure 7 to realize the stable suspension of the thrust structure 7 in the axial direction.
  • the thrust structure 7 is an annular structure.
  • the permanent magnets 4 are plural, and are arranged at regular intervals along the circumferential direction of the middle iron core 1.
  • the number, shape and size of the permanent magnet 4 and the material of the permanent magnet 4 can be designed according to the actual needs of the design, such as the use of magnetic tiles, block magnetic steel, etc.
  • the permanent magnet 4 can be thickened or thinned, the number can be 1, 2, 3 ... etc.
  • the permanent magnet 4 in a cross section perpendicular to the central axis of the middle iron core 1, is, for example, fan-shaped or rectangular.
  • the hybrid magnetic levitation thrust bearing of this embodiment forms the outer iron core 2, the thrust structure 7 and the middle iron core 1 used in the magnetic circuit.
  • the structure is simple, the processing is convenient, no precise coordination is needed, the space utilization is more sufficient, and the entire bearing is simple to implement , Without any complicated process, can effectively reduce the volume of hybrid magnetic suspension bearings and improve processing and production efficiency.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Magnetic Bearings And Hydrostatic Bearings (AREA)

Abstract

一种混合式磁悬浮止推轴承，该混合式磁悬浮止推轴承包括环形的中铁芯（1）和设置在中铁芯（1）两端的外铁芯（2），外铁芯（2）朝向中铁芯（1）的一端设置有环形凹槽（3），各环形凹槽（3）内分别设置有励磁绕组，中铁芯（1）内嵌设有永磁体（4），该混合式磁悬浮止推轴承能够缩减轴承尺寸，降低生产成本。

Description

混合式磁悬浮止推轴承
本申请要求于2018年10月23日提交中国专利局、申请号为201811237256.9、发明名称为“混合式磁悬浮止推轴承”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请属于轴承技术领域，具体涉及一种混合式磁悬浮止推轴承。
背景技术
磁悬浮轴承是利用磁力作用将转子悬浮于空中，使转子与定子之间没有机械接触。其原理是磁感应线与磁浮线成垂直，轴芯与磁浮线是平行的，所以转子的重量就固定在运转的轨道上，利用几乎是无负载的轴芯往反磁浮线方向顶撑，形成整个转子悬空在固定运转轨道上。
与传统的滚动轴承、滑动轴承以及油膜轴承相比，磁轴承不存在机械接触，转子可以运行到很高的转速，具有机械磨损小、能耗低、噪声小、寿命长、无需润滑、无油污染等优点，特别适用于高速、真空、超净等特殊环境中。
在申请号为201310469617.3的中国发明专利中公开了一种节能型永磁偏置磁轴承，这种节能型永磁偏置磁轴承分别设置了径向控制线圈、轴向控制线圈来进行电磁磁路设计，永磁磁路设置了轴向定子、径向定子、外环，并采用定位铝环进行径向定子及永磁体的轴向定位，这样的设计使得整个磁轴承的结构复杂化，不仅实现方式复杂而且成本较高，还会导致磁轴承的体积较大。
发明内容
因此，本申请要解决的技术问题在于提供一种混合式磁悬浮止推轴承，能够缩减轴承尺寸，降低生产成本。
为了解决上述问题，本申请提供一种混合式磁悬浮止推轴承，包括环形的中铁芯和设置在中铁芯两端的外铁芯，外铁芯朝向中铁芯的一端设置有环形凹 槽，各环形凹槽内分别设置有励磁绕组，中铁芯内嵌设有永磁体。
可选地，外铁芯对称设置在中铁芯的两端；和/或，励磁绕组对称设置在中铁芯的两端。
可选地，励磁绕组固定设置在外铁芯上；或，励磁绕组固定设置在中铁芯上。
可选地，外铁芯的纵截面为C形。
可选地，励磁绕组包括绕组骨架和励磁线圈，励磁线圈缠绕在绕组骨架上。
可选地，绕组骨架固定设置在外铁芯上；或，绕组骨架固定设置在中铁芯上。
可选地，绕组骨架固定设置在外铁芯上时，绕组骨架与外铁芯之间设置有填充层。
可选地，填充层为环氧树脂或散热硅脂。
可选地，永磁体与中铁芯之间设置有填充层。
可选地，填充层为环氧树脂。
可选地，混合式磁悬浮止推轴承还包括止推结构，止推结构套设在中铁芯内，外铁芯分别位于止推结构的两侧，并由外铁芯对止推结构形成轴向止挡。
可选地，永磁体为多个，并沿中铁芯的周向均匀间隔设置。
可选地，在垂直于中铁芯的中心轴线的截面内，永磁体为扇环形或矩形。
本申请提供的混合式磁悬浮止推轴承，包括环形的中铁芯和设置在中铁芯两端的外铁芯，外铁芯朝向中铁芯的一端设置有环形凹槽，各环形凹槽内分别设置有励磁绕组，中铁芯内嵌设有永磁体。该混合式磁悬浮止推轴承在外铁芯上形成环形凹槽，并将励磁绕组设置在环形凹槽内，同时将永磁体嵌设在中铁芯内，结构更加简单，实现方式也更容易，能够充分利用外铁芯和中铁芯的可使用空间，使得轴承的整体结构更加紧凑，能够在轴向和径向上可大幅缩减轴承尺寸，降低生产成本。
附图说明
图1为本申请实施例的混合式磁悬浮止推轴承的结构示意图；
图2为本申请实施例的混合式磁悬浮止推轴承的磁路结构图；
图3为本申请实施例的混合式磁悬浮止推轴承的外铁芯与励磁绕组配合的分解结构示意图；
图4为本申请实施例的混合式磁悬浮止推轴承的中铁芯与止推结构的第一 种配合结构图；
图5为本申请实施例的混合式磁悬浮止推轴承的中铁芯与止推结构的第二种配合结构图；
图6为本申请实施例的混合式磁悬浮止推轴承的分解结构图。
附图标记表示为：
1、中铁芯；2、外铁芯；3、环形凹槽；4、永磁体；5、绕组骨架；6、励磁线圈；7、止推结构；8、紧固螺钉。
具体实施方式
结合参见图1至图6所示，根据本申请的实施例，混合式磁悬浮止推轴承包括环形的中铁芯1和设置在中铁芯1两端的外铁芯2，外铁芯2朝向中铁芯1的一端设置有环形凹槽3，各环形凹槽3内分别设置有励磁绕组，中铁芯1内嵌设有永磁体4。
该混合式磁悬浮止推轴承在外铁芯2上形成环形凹槽3，并将励磁绕组设置在环形凹槽3内，同时将永磁体4嵌设在中铁芯1内，结构更加简单，实现方式也更容易，能够充分利用外铁芯2和中铁芯1的可使用空间，使得轴承的整体结构更加紧凑，能够在轴向和径向上可大幅缩减轴承尺寸，降低生产成本。
可选地，外铁芯2对称设置在中铁芯1的两端。
可选地，励磁绕组对称设置在中铁芯1的两端。
在本实施例中，外铁芯2和励磁绕组均对称设置在中铁芯1的两端，具体而言，外铁芯2和励磁绕组均为两个，且均关于中铁芯1的中分面对称，其中中铁芯1的中分面垂直于中铁芯1的中心轴线，且沿轴向方向平分中铁芯1。
在中铁芯1的两端形成对称的外铁芯2和励磁绕组，能够形成更加均衡的磁路，有效地提高混合式磁悬浮止推轴承的磁路稳定性，提高混合式磁悬浮止推轴承的工作性能。
励磁绕组可以固定设置在外铁芯2上，也可以固定设置在中铁芯1上，具体可以根据需要进行设置。
可选地，外铁芯2的纵截面为C形，可以更加方便将励磁绕组设置在外铁芯2内，且更加有利于形成完整的磁路，磁性能更佳。
绕组骨架5可以固定设置在外铁芯2上。励磁绕组包括绕组骨架5和励磁线圈6，励磁线圈6缠绕在绕组骨架5上。在制作励磁绕组时，先将励磁线圈 6绕制在绕组骨架5上，在将绕制好绕组的励磁绕组整体浸泡绝缘漆并烘干，以提高绕组的绝缘性，并将励磁线圈6紧固在绕组骨架5上，保证励磁线圈6不会松动、松脱，然后通过紧固螺钉8将已完全浸漆的励磁绕组固定于外铁芯2上，构成外铁芯组件。
固定于外铁芯2上的励磁绕组除了可以提供控制磁场外，自身也可以起到良好的隔磁效果，能够减少永磁磁路的漏磁，进而提升混合式磁悬浮止推轴承的工作性能。
绕组骨架5也可以对称固定在中铁芯1的两端，从而与中铁芯1构成一个大的组件，然后再与两个外铁芯2进行组装。
绕组骨架5固定设置在外铁芯2上时，绕组骨架5与外铁芯2之间设置有填充层。
填充层为环氧树脂或散热硅脂。
依据使用环境的不同，绕组骨架5与外铁芯2之间填充不同的物质可以提升轴承的性能。例如，在运行环境较恶劣的环境下，在二者之间填充环氧树脂等材料可以加固外铁芯组件的强度，保证励磁绕组不会在恶劣的震动或冲击下断裂或松脱，对其自身的震动也会有所改善；在温度较高的环境下运行时可以在二者之间填充散热硅脂等物质，以提高其散热冷却效果。
可选地，永磁体4与中铁芯1之间设置有填充层，填充层可以将永磁体4更加稳固地固定在中铁芯1的永磁体槽中，从而改善整个混合式磁悬浮止推轴承的震动以及噪声。
填充层例如为环氧树脂。
混合式磁悬浮止推轴承还包括止推结构7，止推结构7套设在中铁芯1内，外铁芯2分别位于止推结构7的两侧，并由外铁芯2对止推结构7形成轴向止挡。
在本实施例中，外铁芯2的径向外边缘与中铁芯1齐平，外铁芯2的径向内边缘超出中铁芯1的径向内边缘，从而使得外铁芯2的径向内边缘能够与止推结构7相配合，形成轴向止挡结构。
可选地，止推结构7的轴向长度略小于中铁芯1的轴向长度，使得止推结构7完全位于中铁芯1内，能够有效避免止推结构7与中铁芯1两端的外铁芯2之间发生接触，从而起到有效的磁悬浮止推作用。
永磁体4为整个轴承提供永磁磁场(偏置磁场)，永磁磁场通过永磁体4、外铁芯2、中铁芯1和止推结构7能够构成永磁磁路，在励磁线圈6上通入电 流后产生控制磁场，永磁磁路和控制磁场综合作用在止推结构7上，实现止推结构7沿轴向方向稳定悬浮。在本实施例中，止推结构7为环形结构。
永磁体4为多个，并沿中铁芯1的周向均匀间隔设置。永磁体4的数量、形状和尺寸以及永磁体4的材料可以根据设计的实际需求进行设计，例如采用磁瓦、块状磁钢等，永磁体4可以加厚或者减薄，数量可以为1、2、3……等。
结合参见图4和图5所示，在垂直于中铁芯1的中心轴线的截面内，永磁体4例如为扇环形或矩形。
本实施例的混合式磁悬浮止推轴承构成磁路所采用的外铁芯2、止推结构7和中铁芯1结构简单，加工方便，无需精密配合，空间利用更加充分，整个轴承实现方式简单，无需任何复杂的工艺，可以有效地缩减混合式磁悬浮轴承的体积并提升加工及生产效率。
本领域的技术人员容易理解的是，在不冲突的前提下，上述各有利方式可以自由地组合、叠加。
以上仅为本申请的较佳实施例而已，并不用以限制本申请，凡在本申请的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本申请的保护范围之内。以上仅是本申请的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本申请技术原理的前提下，还可以做出若干改进和变型，这些改进和变型也应视为本申请的保护范围。

Claims (13)

  1. 一种混合式磁悬浮止推轴承，包括环形的中铁芯(1)和设置在所述中铁芯(1)两端的外铁芯(2)，所述外铁芯(2)朝向所述中铁芯(1)的一端设置有环形凹槽(3)，各所述环形凹槽(3)内分别设置有励磁绕组，所述中铁芯(1)内嵌设有永磁体(4)。
  2. 根据权利要求1所述的混合式磁悬浮止推轴承，其中，所述外铁芯(2)对称设置在所述中铁芯(1)的两端；和/或，所述励磁绕组对称设置在所述中铁芯(1)的两端。
  3. 根据权利要求1所述的混合式磁悬浮止推轴承，其中，所述励磁绕组固定设置在所述外铁芯(2)上；或，所述励磁绕组固定设置在所述中铁芯(1)上。
  4. 根据权利要求1所述的混合式磁悬浮止推轴承，其中，所述外铁芯(2)的纵截面为C形。
  5. 根据权利要求1所述的混合式磁悬浮止推轴承，其中，所述励磁绕组包括绕组骨架(5)和励磁线圈(6)，所述励磁线圈(6)缠绕在所述绕组骨架(5)上。
  6. 根据权利要求5所述的混合式磁悬浮止推轴承，其中，所述绕组骨架(5)固定设置在所述外铁芯(2)上；或，所述绕组骨架(5)固定设置在所述中铁芯(1)上。
  7. 根据权利要求6所述的混合式磁悬浮止推轴承，其中，所述绕组骨架(5)固定设置在所述外铁芯(2)上时，所述绕组骨架(5)与所述外铁芯(2)之间设置有填充层。
  8. 根据权利要求7所述的混合式磁悬浮止推轴承，其中，所述填充层为环氧树脂或散热硅脂。
  9. 根据权利要求1所述的混合式磁悬浮止推轴承，其中，所述永磁体(4)与所述中铁芯(1)之间设置有填充层。
  10. 根据权利要求9所述的混合式磁悬浮止推轴承，其中，所述填充层为环氧树脂。
  11. 根据权利要求1至10中任一项所述的混合式磁悬浮止推轴承，其中，所述混合式磁悬浮止推轴承还包括止推结构(7)，所述止推结构(7)套设在所述中铁芯(1)内，所述外铁芯(2)分别位于所述止推结构(7)的两侧，并由所述外铁芯(2)对所述止推结构(7)形成轴向止挡。
  12. 根据权利要求1至10中任一项所述的混合式磁悬浮止推轴承，其中，所述永磁体(4)为多个，并沿所述中铁芯(1)的周向均匀间隔设置。
  13. 根据权利要求12所述的混合式磁悬浮止推轴承，其中，在垂直于所述中铁芯(1)的中心轴线的截面内，所述永磁体(4)为扇环形或矩形。
PCT/CN2019/070666 2018-10-23 2019-01-07 混合式磁悬浮止推轴承 WO2020082615A1 (zh)

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