CN107093939B - A magnetic levitation motor and vacuum cleaner - Google Patents
A magnetic levitation motor and vacuum cleaner Download PDFInfo
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- CN107093939B CN107093939B CN201710471809.6A CN201710471809A CN107093939B CN 107093939 B CN107093939 B CN 107093939B CN 201710471809 A CN201710471809 A CN 201710471809A CN 107093939 B CN107093939 B CN 107093939B
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- 238000005339 levitation Methods 0.000 title claims description 27
- 238000006073 displacement reaction Methods 0.000 claims abstract description 17
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 4
- 239000004917 carbon fiber Substances 0.000 claims description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 4
- 239000000725 suspension Substances 0.000 abstract 4
- 239000000428 dust Substances 0.000 abstract 1
- BGPVFRJUHWVFKM-UHFFFAOYSA-N N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] Chemical compound N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] BGPVFRJUHWVFKM-UHFFFAOYSA-N 0.000 description 6
- 239000004020 conductor Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/08—Structural association with bearings
- H02K7/09—Structural association with bearings with magnetic bearings
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
- A47L9/28—Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N15/00—Holding or levitation devices using magnetic attraction or repulsion, not otherwise provided for
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
Description
技术领域Technical field
本发明涉及磁悬浮技术领域，尤其涉及一种磁悬浮电机及吸尘器。The present invention relates to the field of magnetic levitation technology, and in particular to a magnetic levitation motor and a vacuum cleaner.
背景技术Background technique
小型电动机是最常见的将电能转化为机械能的形式，在家用电器和工业领域具有广泛的应用。传统的电动机主要包括电机定子部分、电机转子部分、转子支撑轴承以及机壳部分，电机定子部分与电机转子部分之间通过机械轴承联接或存在机械接触，因此电机转子运动过程中存在机械摩擦。Small electric motors are the most common form of converting electrical energy into mechanical energy and have a wide range of applications in household appliances and industry. The traditional motor mainly includes the motor stator part, the motor rotor part, the rotor support bearing and the casing part. The motor stator part and the motor rotor part are connected through mechanical bearings or have mechanical contact, so there is mechanical friction during the movement of the motor rotor.
机械摩擦不仅增加转子的摩擦阻力，使运动部件磨损，产生机械振动和噪声，而且会造成部件发热，使润滑剂性能变差，严重的会使电机气隙不均匀，绕组发热，温升增大，从而降低电机效能，最终缩短电机使用寿命。而且机械轴承需要润滑油来维持，这样既影响电机寿命又不利于设备的清洁，因此，为了实现超高转速运行和设备的长寿命、清洁无油必须在电动机中采用非接触式支撑方式，即磁悬浮支撑方式。Mechanical friction not only increases the friction resistance of the rotor, causes the moving parts to wear out, generates mechanical vibration and noise, but also causes the parts to heat up, worsening the performance of the lubricant. In severe cases, the air gap of the motor will be uneven, the windings will heat up, and the temperature rise will increase. , thereby reducing motor performance and ultimately shortening motor service life. Moreover, mechanical bearings require lubricating oil to maintain, which affects the life of the motor and is not conducive to the cleaning of the equipment. Therefore, in order to achieve ultra-high speed operation and long life of the equipment, clean and oil-free, a non-contact support method must be used in the motor, that is, Magnetic levitation support method.
发明内容Contents of the invention
(一)要解决的技术问题(1) Technical problems to be solved
本发明的目的是提供一种磁悬浮电机，解决现有技术中磁悬浮电机无法实现小型化，家用电器和工业领域的小型电动机无法实现高速运转、寿命低的问题。The purpose of the present invention is to provide a magnetic levitation motor, which solves the problems in the prior art that the magnetic levitation motor cannot be miniaturized, and the small motors in household appliances and industrial fields cannot achieve high-speed operation and have a low lifespan.
(二)技术方案(2) Technical solutions
为了解决上述技术问题，本发明提供了一种磁悬浮电机，包括电机定子铁芯、转子轴、用于检测所述转子轴轴向位移的轴向位移传感器以及用于轴向支承所述转子轴的轴向磁轴承；所述电机定子铁芯与轴向磁轴承同轴设置，且所述电机定子铁芯以及所述轴向磁轴承均套设在所述转子轴的外侧；还包括径向支承系统，所述径向支承系统包括两组永磁体组，每组所述永磁体组均包括径向转子永磁体和径向定子永磁体，所述径向转子永磁体固定在所述转子轴的外侧，所述径向定子永磁体套设在所述径向转子永磁体的外侧，且所述径向转子永磁体的外表面与所述径向定子永磁体的内表面留有间隙；两组所述永磁体组分别设置在所述电机定子铁芯的两侧；且所述径向转子永磁体与其相对应的所述径向定子永磁体之间为排斥力。In order to solve the above technical problems, the present invention provides a magnetic levitation motor, which includes a motor stator core, a rotor shaft, an axial displacement sensor for detecting the axial displacement of the rotor shaft, and an axial displacement sensor for axially supporting the rotor shaft. Axial magnetic bearing; the motor stator core and the axial magnetic bearing are coaxially arranged, and the motor stator core and the axial magnetic bearing are sleeved on the outside of the rotor shaft; it also includes a radial support System, the radial support system includes two sets of permanent magnet sets, each set of permanent magnet sets includes a radial rotor permanent magnet and a radial stator permanent magnet, and the radial rotor permanent magnet is fixed on the rotor shaft. On the outside, the radial stator permanent magnet is sleeved on the outside of the radial rotor permanent magnet, and there is a gap between the outer surface of the radial rotor permanent magnet and the inner surface of the radial stator permanent magnet; two groups The permanent magnet groups are respectively arranged on both sides of the motor stator core; and there is a repulsive force between the radial rotor permanent magnets and their corresponding radial stator permanent magnets.
根据本发明，所述轴向位移传感器设置在所述转子轴的非输出端，且位于所述转子轴的轴向延长线上。According to the present invention, the axial displacement sensor is provided at the non-output end of the rotor shaft and is located on the axial extension line of the rotor shaft.
根据本发明，所述轴向磁轴承设有两个，两个所述轴向磁轴承分别设置在所述电机定子铁芯的两侧，且所述转子轴的两端均设有与所述轴向磁轴承两侧的导磁体分别配合的台阶面，所述轴向磁轴承的靠近所述电机定子铁芯一侧的导磁体内径大于远离所述电机定子铁芯一侧导磁体的内径。According to the present invention, there are two axial magnetic bearings, the two axial magnetic bearings are respectively provided on both sides of the stator core of the motor, and both ends of the rotor shaft are provided with the The magnetic conductive bodies on both sides of the axial magnetic bearing are matched with step surfaces respectively. The inner diameter of the magnetic conductive body on the side of the axial magnetic bearing close to the stator core of the motor is larger than the inner diameter of the magnetic conductive body on the side away from the stator core of the motor.
根据本发明，还包括壳体，所述电机定子铁芯、径向定子永磁体以及轴向磁轴承均固定于所述壳体内，所述转子轴的输出端由所述壳体的一侧伸出。According to the present invention, it also includes a housing. The motor stator core, radial stator permanent magnets and axial magnetic bearings are all fixed in the housing. The output end of the rotor shaft extends from one side of the housing. out.
根据本发明，所述壳体包括两个一端开口的分壳体，两个所述分壳体的开口端可拆卸连接，每个所述分壳体内分别固定有一个所述径向定子永磁体和一个所述轴向磁轴承，所述分壳体与开口端相对的一端设有用于所述转子轴伸出的轴孔。According to the present invention, the housing includes two sub-casings with one end open, the open ends of the two sub-casings are detachably connected, and one of the radial stator permanent magnets is fixed in each of the sub-casings. and an axial magnetic bearing, and an end of the sub-casing opposite to the open end is provided with a shaft hole for the rotor shaft to extend.
根据本发明，所述分壳体的内腔呈阶梯状设置，由所述分壳体的开口处至所述轴孔处各级台阶面的直径逐渐缩小，所述分壳体的开口处的首级台阶面用于固定电机定子铁芯，所述径向定子永磁体和轴向磁轴承分别固定于所述首级台阶面与轴孔之间的不同台阶面上。According to the present invention, the inner cavity of the sub-casing is arranged in a stepped shape, and the diameter of each step surface gradually decreases from the opening of the sub-casing to the shaft hole. The first step surface is used to fix the motor stator core, and the radial stator permanent magnets and axial magnetic bearings are respectively fixed on different step surfaces between the first step surface and the shaft hole.
根据本发明，所述分壳体内所述径向定子永磁体位于所述轴向磁轴承与所述电机定子铁芯之间。According to the present invention, the radial stator permanent magnet in the sub-casing is located between the axial magnetic bearing and the motor stator core.
根据本发明，所述转子轴与所述电机定子铁芯对应的位置设有主永磁体。According to the present invention, a main permanent magnet is provided at a position corresponding to the rotor shaft and the stator core of the motor.
根据本发明，所述主永磁体外侧套设有碳纤维材质护套。According to the present invention, the outer side of the main permanent magnet is covered with a carbon fiber sheath.
本发明还提供了一种吸尘器，包括上述的磁悬浮电机。The present invention also provides a vacuum cleaner, including the above-mentioned magnetic levitation motor.
(三)有益效果(3) Beneficial effects
本发明的上述技术方案与现有技术相比具有如下优点：本发明实施例提供的磁悬浮电机通过设置的轴向磁轴承实现转子轴的轴向支承，转子轴的径向支承采用了永磁体组，永磁体组中的径向转子永磁体与径向定子永磁体通过排斥力达到平衡，实现了对于转子轴的径向支承，省去了在磁悬浮电机工作过程中根据径向位移传感器来进行调节径向磁轴承对于转子轴的吸引力，结构简单，减小了磁悬浮电机的体积，降低了成本。Compared with the prior art, the above technical solution of the present invention has the following advantages: the magnetic levitation motor provided by the embodiment of the present invention realizes the axial support of the rotor shaft through the axial magnetic bearing, and the radial support of the rotor shaft adopts a permanent magnet group. , the radial rotor permanent magnets and the radial stator permanent magnets in the permanent magnet group achieve balance through repulsive force, achieving radial support for the rotor shaft, eliminating the need for adjustment based on the radial displacement sensor during the operation of the magnetic levitation motor. The radial magnetic bearing attracts the rotor shaft and has a simple structure, which reduces the size and cost of the magnetic levitation motor.
附图说明Description of the drawings
图1是本发明实施例提供的磁悬浮电机的结构示意图。Figure 1 is a schematic structural diagram of a magnetic levitation motor provided by an embodiment of the present invention.
图中：1：电机定子铁芯；2：转子轴；3：轴向磁轴承；4：轴向位移传感器；5：径向转子永磁体；6：径向定子永磁体；7：分壳体；8：主永磁体。In the picture: 1: Motor stator core; 2: Rotor shaft; 3: Axial magnetic bearing; 4: Axial displacement sensor; 5: Radial rotor permanent magnet; 6: Radial stator permanent magnet; 7: Sub-casing ;8: Main permanent magnet.
具体实施方式Detailed ways
为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本发明的一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动的前提下所获得的所有其他实施例，都属于本发明保护的范围。In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without any creative work fall within the scope of protection of the present invention.
如图1所示，本发明实施例提供的一种磁悬浮电机，包括电机定子铁芯1、转子轴2、用于检测转子轴2轴向位移的轴向位移传感器4以及用于轴向支承转子轴2的轴向磁轴承3；电机定子铁芯1与轴向磁轴承3同轴设置，且电机定子铁芯1以及轴向磁轴承3均套设在转子轴2的外侧，本领域技术人员可知电机定子铁芯1以及轴向磁轴承3与转子轴2之间留有间隙；还包括径向支承系统，径向支承系统包括两组永磁体组，每组永磁体组均包括径向转子永磁体5和径向定子永磁体6，径向转子永磁体5固定在转子轴2的外侧，径向定子永磁体6套设在径向转子永磁体5的外侧，且径向转子永磁体5的外表面与径向定子永磁体6的内表面留有间隙；两组永磁体组分别设置在电机定子铁芯1的两侧，且径向转子永磁体5与其相对应的所述径向定子永磁体6之间为排斥力。As shown in Figure 1, an embodiment of the present invention provides a magnetic levitation motor, which includes a motor stator core 1, a rotor shaft 2, an axial displacement sensor 4 for detecting the axial displacement of the rotor shaft 2, and an axial displacement sensor for axially supporting the rotor. The axial magnetic bearing 3 of the shaft 2; the motor stator core 1 and the axial magnetic bearing 3 are coaxially arranged, and the motor stator core 1 and the axial magnetic bearing 3 are both sleeved on the outside of the rotor shaft 2. Those skilled in the art It can be seen that there is a gap between the stator core 1 and the axial magnetic bearing 3 of the motor and the rotor shaft 2; it also includes a radial support system. The radial support system includes two sets of permanent magnets, and each set of permanent magnets includes a radial rotor. Permanent magnets 5 and radial stator permanent magnets 6, the radial rotor permanent magnet 5 is fixed on the outside of the rotor shaft 2, the radial stator permanent magnet 6 is sleeved on the outside of the radial rotor permanent magnet 5, and the radial rotor permanent magnet 5 There is a gap between the outer surface of the radial stator permanent magnet 6 and the inner surface of the radial stator permanent magnet 6; two sets of permanent magnet groups are respectively arranged on both sides of the motor stator core 1, and the radial rotor permanent magnet 5 and its corresponding radial stator There is a repulsive force between the permanent magnets 6 .
本发明实施例提供的磁悬浮电机通过设置的轴向磁轴承3实现转子轴2的轴向支承，转子轴2的径向支承采用了永磁体组，永磁体组中的径向转子永磁体5与径向定子永磁体6通过排斥力达到平衡，实现了对于转子轴2的径向支承，省去了在磁悬浮电机工作过程中根据径向位移传感器来进行调节径向磁轴承对于转子轴2的吸引力，结构简单，减小了磁悬浮电机的体积，降低了成本。The magnetic levitation motor provided by the embodiment of the present invention realizes axial support of the rotor shaft 2 through the axial magnetic bearing 3. The radial support of the rotor shaft 2 adopts a permanent magnet group. The radial rotor permanent magnet 5 in the permanent magnet group and The radial stator permanent magnets 6 achieve balance through repulsive force, achieving radial support for the rotor shaft 2, eliminating the need to adjust the attraction of the rotor shaft 2 based on the radial displacement sensor during the operation of the magnetic levitation motor. It has a simple structure, reduces the size of the magnetic levitation motor and reduces the cost.
优选地，本实施例中的轴向位移传感器4设置在转子轴2的非输出端，且位于转子轴2的轴向延长线上。轴向位移传感器4设置在转子轴2的非输出端使得磁悬浮电机的结构更加紧凑。Preferably, the axial displacement sensor 4 in this embodiment is arranged at the non-output end of the rotor shaft 2 and is located on the axial extension line of the rotor shaft 2 . The axial displacement sensor 4 is arranged at the non-output end of the rotor shaft 2 to make the structure of the magnetic levitation motor more compact.
优选地，本实施例中轴向磁轴承3设有两个，两个轴向磁轴承3分别设置在电机定子铁芯1的两侧，且转子轴2的两端均设有与轴向磁轴承3两侧的导磁体分别配合的台阶面，为了便于转子轴2穿过轴向磁轴承3进行装配，轴向磁轴承3的靠近电机定子铁芯1一侧的导磁体内径大于远离电机定子铁芯1一侧导磁体的内径。转子轴2的两端分别设置一个轴向磁轴承3，装配时转子轴2穿过轴向磁轴承3，使轴向磁轴承3的两个导磁体分别与转子轴2上的两个台阶面接触即可完成轴向磁轴承3的安装，装配简单方便。两个轴向磁轴承3分别实现转子轴2左右两端的支承限位，轴向磁轴承3的控制更加简单。本实施例中轴向磁轴承3的设置并不限于此，也可以是在转子轴2上设置推力盘，设置一个轴向磁轴承3与推力盘相配合，推力盘的两侧分别作为轴向磁轴承3支承转子轴2的支承面，安装时需要将轴向磁轴承3分块安装，装配复杂。Preferably, in this embodiment, there are two axial magnetic bearings 3. The two axial magnetic bearings 3 are respectively arranged on both sides of the motor stator core 1, and both ends of the rotor shaft 2 are provided with axial magnetic bearings. The magnetic conductors on both sides of the bearing 3 are respectively matched with stepped surfaces. In order to facilitate the assembly of the rotor shaft 2 through the axial magnetic bearing 3, the inner diameter of the magnetic conductor on the side of the axial magnetic bearing 3 close to the motor stator core 1 is larger than that of the magnet far away from the motor stator. The inner diameter of the magnetic conductor on one side of core 1. An axial magnetic bearing 3 is provided at both ends of the rotor shaft 2. During assembly, the rotor shaft 2 passes through the axial magnetic bearing 3, so that the two magnet conductive bodies of the axial magnetic bearing 3 are respectively in contact with the two step surfaces on the rotor shaft 2. The installation of the axial magnetic bearing 3 can be completed by contact, and the assembly is simple and convenient. The two axial magnetic bearings 3 realize the support limits at the left and right ends of the rotor shaft 2 respectively, making the control of the axial magnetic bearings 3 simpler. The arrangement of the axial magnetic bearing 3 in this embodiment is not limited to this. A thrust plate can also be provided on the rotor shaft 2, and an axial magnetic bearing 3 is provided to cooperate with the thrust plate. Both sides of the thrust plate serve as axial directions. The magnetic bearing 3 supports the supporting surface of the rotor shaft 2. During installation, the axial magnetic bearing 3 needs to be installed in pieces, and the assembly is complicated.
优选地，本实施例中磁悬浮电机还包括壳体，电机定子铁芯1、径向定子永磁体6以及轴向磁轴承3均固定于壳体内，转子轴2的输出端由壳体的一侧伸出。具体地，本实施例中壳体包括两个一端开口的分壳体7，两个分壳体7的开口端可拆卸连接，每个分壳体7内分别固定有一个径向定子永磁体6和一个轴向磁轴承3，分壳体7与开口端相对的一端设有用于转子轴2伸出的轴孔。将壳体设置为两部分拼接而成，每个分壳体7内均设置有定子永磁体和轴向磁轴承3，可以实现模块化生产，装配时将转子轴2套设上电机定子铁芯1，并将转子轴2的两端分别穿过两个分壳体7的径向定子永磁体6和轴向磁轴承3，将定子铁芯与分壳体7固定，两个分壳体7拼接在一起即可完成装配，提高了生产效率，降低了成本。Preferably, the magnetic levitation motor in this embodiment also includes a housing. The motor stator core 1, radial stator permanent magnets 6 and axial magnetic bearings 3 are all fixed in the housing. The output end of the rotor shaft 2 is connected by one side of the housing. Reach out. Specifically, in this embodiment, the housing includes two sub-casings 7 with one end open. The open ends of the two sub-casings 7 are detachably connected. A radial stator permanent magnet 6 is fixed in each sub-casing 7. and an axial magnetic bearing 3. The end of the sub-casing 7 opposite to the open end is provided with a shaft hole for the rotor shaft 2 to extend. The housing is made of two parts spliced together. Each sub-housing 7 is equipped with a stator permanent magnet and an axial magnetic bearing 3, which can realize modular production. During assembly, the rotor shaft 2 is set on the stator core of the motor. 1. Pass the two ends of the rotor shaft 2 through the radial stator permanent magnets 6 and axial magnetic bearings 3 of the two sub-casings 7 respectively, fix the stator core and the sub-casings 7, and fix the two sub-casings 7 Assembly can be completed by splicing together, which improves production efficiency and reduces costs.
优选地，本实施例中分壳体7的内腔呈阶梯状设置，由分壳体7的开口处至轴孔处各级台阶面的直径逐渐缩小，分壳体7的开口处的首级台阶面用于固定电机定子铁芯1，径向定子永磁体6和轴向磁轴承3分别固定于首级台阶面与轴孔之间的不同台阶面上。阶梯状设置便于壳体内各个部件的固定以及定位。优选地，本实施例中分壳体7内径向定子永磁体6位于轴向磁轴承3与电机定子铁芯1之间。由于轴向磁轴承3对应位置处转子轴2设置台阶导致直径较小，若将轴向磁轴承3设置在较为靠近电机定子铁芯1的位置，会导致转子轴2的轴径变化过大，影响转子轴2的强度以及使用寿命，并且由于永磁体组的径向转子永磁体5与径向定子永磁体6之间的斥力与面积有关，若将轴向磁轴承3设置在较为靠近电机定子铁芯1的位置，永磁体组设置在相对距离电机定子铁芯1较远的位置，在提供同样斥力大小的情况下，由于转子轴2的直径小需要设置的永磁体组宽度会增大。因此，本发明实施例中径向定子永磁体6位于轴向磁轴承3与电机定子铁芯1之间，保证了电机使用性能的同时，进一步地节约空间，使结构更加紧凑。同时，由于装配时需要将径向转子永磁体5固定在转子轴2上，导致该处直径较大，径向定子永磁体6设置在轴向磁轴承3与电机定子铁芯1之间便于装配。Preferably, in this embodiment, the inner cavity of the sub-casing 7 is arranged in a stepped shape, and the diameter of each step surface gradually decreases from the opening of the sub-casing 7 to the shaft hole. The step surface is used to fix the motor stator core 1. The radial stator permanent magnet 6 and the axial magnetic bearing 3 are respectively fixed on different step surfaces between the first step surface and the shaft hole. The stepped arrangement facilitates the fixing and positioning of various components in the housing. Preferably, in this embodiment, the radial stator permanent magnet 6 in the sub-casing 7 is located between the axial magnetic bearing 3 and the motor stator core 1 . Since the steps on the rotor shaft 2 at the corresponding position of the axial magnetic bearing 3 result in a smaller diameter, if the axial magnetic bearing 3 is placed closer to the stator core 1 of the motor, the shaft diameter of the rotor shaft 2 will change too much. Affects the strength and service life of the rotor shaft 2, and because the repulsion between the radial rotor permanent magnets 5 and the radial stator permanent magnets 6 of the permanent magnet group is related to the area, if the axial magnetic bearing 3 is set closer to the motor stator As for the position of the iron core 1, the permanent magnet group is set relatively far away from the motor stator core 1. Under the condition of providing the same repulsive force, the width of the permanent magnet group that needs to be set will increase due to the small diameter of the rotor shaft 2. Therefore, in the embodiment of the present invention, the radial stator permanent magnet 6 is located between the axial magnetic bearing 3 and the motor stator core 1, which ensures the performance of the motor while further saving space and making the structure more compact. At the same time, since the radial rotor permanent magnet 5 needs to be fixed on the rotor shaft 2 during assembly, the diameter there is larger. The radial stator permanent magnet 6 is arranged between the axial magnetic bearing 3 and the motor stator core 1 to facilitate assembly. .
优选地，本实施例中转子轴2与电机定子铁芯1对应的位置设有主永磁体8。主永磁体8与转子轴2形成转子组件共同转动，使该电机成为永磁电机，相较于普通电机，主永磁体8占用空间小，结构更加紧凑。进一步地，本实施例中主永磁体8外侧套设有碳纤维材质护套。采用高强度低密度的碳纤维材质在保护主永磁体8避免在离心力作用下破裂的同时，更大程度上保证了电机的轻量化。Preferably, in this embodiment, the main permanent magnet 8 is provided at the position corresponding to the rotor shaft 2 and the motor stator core 1 . The main permanent magnet 8 and the rotor shaft 2 form a rotor assembly that rotates together, making the motor a permanent magnet motor. Compared with ordinary motors, the main permanent magnet 8 takes up less space and has a more compact structure. Furthermore, in this embodiment, the outer side of the main permanent magnet 8 is covered with a carbon fiber sheath. The use of high-strength and low-density carbon fiber material not only protects the main permanent magnet 8 from breaking under the action of centrifugal force, but also ensures the lightweight of the motor to a greater extent.
本发明实施例还提供了一种吸尘器，包括上述的磁悬浮电机。提高了吸尘器的使用寿命，降低了噪音，提高了系统性能。An embodiment of the present invention also provides a vacuum cleaner, including the above-mentioned magnetic levitation motor. Increases the service life of the vacuum cleaner, reduces noise, and improves system performance.
最后应说明的是：以上实施例仅用以说明本发明的技术方案，而非对其限制；尽管参照前述实施例对本发明进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本发明各实施例技术方案的精神和范围。Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that it can still be used Modifications are made to the technical solutions described in the foregoing embodiments, or equivalent substitutions are made to some of the technical features; however, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (8)
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| CN108306552B (en) * | 2018-04-23 | 2024-05-31 | 温州伏尔特电子科技有限公司 | Magnetic suspension motor |
| CN108808973B (en) * | 2018-06-15 | 2020-07-03 | 苏州忻庭沢机电科技有限公司 | Double-shaft magnetic suspension bearing reluctance motor |
| CN113315301A (en) * | 2021-05-10 | 2021-08-27 | 鑫磊压缩机股份有限公司 | Magnetic suspension high-speed asynchronous motor |
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