Outward rotation type magnetic suspension bearing and generator

Abstract

The invention relates to an outer rotating type magnetic suspension bearing and a generator. The outer rotating type magnetic suspension bearing comprises an inner stator assembly and an outer rotor assembly. The inner stator assembly comprises a fixed inner ring, a suspension magnet and a traction magnet; the suspension magnets are arranged on the edge of the outer side of the fixed inner ring and are symmetrically arranged at intervals in the circumferential direction of the fixed inner ring, the top of each suspension magnet is concaved inwards to form a first groove, and the two side edges of each first groove are oppositely and obliquely arranged; the traction magnet is arranged in the first groove; the outer rotor assembly comprises a rotating body, a first magnet and a second magnet; the rotating body is arranged on the outer side of the fixed inner ring in a surrounding mode, and the rotating body and the fixed inner ring are coaxially and rotatably arranged. The first magnets are arranged on the suspension magnets in a one-to-one correspondence manner, are of wedge-shaped structures, extend into the corresponding first grooves, and form same-stage magnetic pole pairs with the inclined surfaces of the first grooves; the second magnet is arranged on the top of the first magnet and forms a same-pole magnetic pole pair with the traction magnet.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of bearings, and particularly relates to an outer-rotation type magnetic suspension bearing and a Fenton outer-rotation type magnetic suspension bearing. BACKGROUND

[0002] With the increasing demand for efficient and low-friction operation, magnetic suspension technology has been widely concerned in the fields of precision motors, flywheel energy storage, fans and aerospace, etc. Traditional magnetic suspension bearings mostly adopt an inner-rotor structure, that is, the rotor is located inside the bearing assembly, and the stator is wrapped outside. Although this structure is mostly used in low-inertia systems, its structural limitations gradually appear in devices that require large rotational inertia, high power output or high space utilization. On the other hand, most existing magnetic suspension bearings achieve multi-degree-of-freedom suspension and positioning through independently arranged axial magnetic suspension units and radial magnetic suspension units, resulting in a complex overall system structure, large size and high difficulty in control coordination, which is particularly unsuitable for outer-rotation application scenarios with limited size or high speed rotation. Meanwhile, a linear magnetic suspension bearing is disclosed in Chinese Patent CN202597466U, in which the suspension magnets are arranged vertically in a linear arrangement or in a plane-to-plane arrangement, which cannot simultaneously consider the stable suspension control in the axial and radial directions in a limited space, and is prone to disturbance, wear or demagnetization risk.

[0003] Therefore, how to provide a bearing with compact structure, high reliability, outer-rotation layout characteristics and the ability to simultaneously realize axial and radial suspension to meet the use needs of high-inertia systems is a technical problem to be solved in the field. SUMMARY

[0004] To solve at least one of the above technical problems, the application provides an outer-rotation type magnetic suspension bearing, comprising: an inner stator assembly and an outer rotor assembly.

[0005] The inner stator assembly comprises: a fixed inner ring, a suspension magnet and a traction magnet.

[0006] The suspension magnet is arranged on the outer side edge of the fixed inner ring, is symmetrically arranged along the circumferential direction of the fixed inner ring, and the top of each suspension magnet is concave to form a first groove, and the two side edges of the first groove are oppositely inclined.

[0007] The traction magnet is arranged in the first groove and is used to realize the radial suspension and rotational traction of the outer rotor assembly.

[0008] The outer rotor assembly comprises: a rotating body, a first magnet and a second magnet.

[0009] The rotating body is arranged outside the fixed inner ring, is coaxial with the fixed inner ring and is rotatable.

[0010] The first magnet is correspondingly arranged in the suspension magnet, and has a wedge structure, which extends into the corresponding first groove and forms a same level magnetic pole pair with the inclined surface of the first groove, so as to realize axial and radial suspension;

[0011] The second magnet is arranged on the top of the first magnet, and forms a same level magnetic pole pair with the traction magnet, so as to provide radial suspension and traction of the outer rotor assembly.

[0012] Further, the suspension magnet is a fixedly installed electromagnet winding;

[0013] The second magnet is a permanent magnet;

[0014] The electromagnet winding is arranged opposite to the second magnet arranged on the rotor assembly, and constitutes a stator-rotor magnetic field system of the permanent magnet synchronous motor.

[0015] Further, the traction magnet is a fixedly installed three-phase electromagnet winding;

[0016] Each phase electromagnet winding of the three-phase electromagnet winding is uniformly distributed in the inner circle of the fixed circle, and each phase electromagnet winding is arranged opposite to the second magnet, and constitutes a stator-rotor magnetic field system of the permanent magnet synchronous motor.

[0017] Further, the first groove of the suspension magnet is inwardly recessed to form a second groove; the electromagnet winding is arranged in the second groove.

[0018] Further, the top of the first magnet is inwardly recessed to form a third groove corresponding to the second groove; the second magnet is arranged in the third groove.

[0019] Further, the inner stator assembly further comprises a transverse stop arranged up and down along the circumferential direction of the fixed inner circle;

[0020] The transverse stop partially covers the rotating body, and is used for limiting the radial displacement of the outer rotor assembly.

[0021] Further, the outer rotor magnetic suspension bearing further comprises a brake clamp arranged between the transverse stop and the outer rotor assembly;

[0022] One end of the brake clamp is fixed on the transverse stop, and the other end is telescopically abutted on the side surface of the outer rotor assembly.

[0023] Further, a plurality of first installation grooves are symmetrically arranged in the circumferential direction of the fixed inner circle; the suspension magnet is completely embedded in the first installation groove.

[0024] Further, the rotating body comprises a rotor seat and an outer rotor connecting piece;

[0025] The rotor seat has a ring shape, and a second installation groove is arranged on the top of the rotor seat, which is used for installing the outer rotor connecting piece; the bottom of the rotor seat is connected with the first magnet;

[0026] The bottom part of the outer rotor connector is embedded in the second installation groove, and the top part is used for installing the outer rotor load structure or as the output end of the rotating shaft.

[0027] A generator comprising the outer-rotor magnetic suspension bearing; wherein the second magnet of the outer-rotor magnetic suspension bearing is a permanent magnet, and the traction magnet is an electromagnet winding; through the rotation of the outer-rotor assembly, the traction magnet (electromagnet winding) cuts the magnetic induction lines of the second magnet, realizing the efficient conversion of mechanical energy into electrical energy.

[0028] In this embodiment, an outer-rotor magnetic suspension bearing is given, the inner-stator assembly is fixed in the equipment shell or shafting structure as a stationary part; the outer-rotor assembly is sleeved outside the fixed inner ring as a rotating part to realize efficient and low-friction rotation. When running, the repulsion force between the suspension magnet and the first magnet of the same level of magnetic poles forms a suspension force field in the radial and axial directions under the guidance of the first groove inclined structure, so that the outer-rotor assembly is in a non-contact suspension state; the first magnet is in a wedge-shaped structure and is deeply arranged in the first groove, and a stable magnetic repulsion angle is formed between the first magnet and the inclined surface of the groove, effectively improving the distribution stability of the suspension force. At the same time, the traction magnet and the second magnet above it form a same-level magnetic pole pair, which exerts an additional traction force in the radial direction, provides a radial centering restraint, and at the same time realizes an auxiliary rotating traction effect, ensuring the dynamic stability during rotation. Since the entire bearing does not need traditional mechanical contact, it realizes non-friction support and rotation through a magnetic field, and the outer-rotor assembly rotates around the inner-stator, so that the rotating radius is larger under the same mass, effectively improving the overall rotational inertia of the system, and it is suitable for scenes such as fans, flywheel energy storage, outer-rotor motors and other scenes with high requirements for rotational inertia. At the top of the suspension magnet, a first groove with a relative inclination is designed, and a wedge-shaped first magnet is inserted into the groove, and the resultant force of the same-level magnetic pole pair is decomposed into an axial force and a radial force in the inclined direction, thereby realizing that a group of magnet structures simultaneously complete bidirectional suspension positioning on the structure. Compared with the traditional design of independently arranging axial magnets and radial magnets, the present application greatly simplifies the structure, reduces the number of components and control complexity. The second magnet is arranged at the top of the first magnet and forms a same-level magnetic pole pair with the traction magnet arranged inside the groove, effectively exerting an additional stable traction and resetting force in the radial direction, preventing eccentric displacement or vortex vibration of the outer rotor during rotation, and realizing the functions of suspension and rotation without the need for external large sensors or active controllers. In summary, the outer-rotor magnetic suspension bearing provided by the present application has a compact structure, high reliability, and an outer-rotor layout characteristic, can realize axial and radial suspension at the same time, and meets the use needs of high-inertia systems. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to describe the technical solutions of the embodiments of the present application or the prior art more clearly, the accompanying drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the accompanying drawings in the following description only represent some of the embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort based on the drawings shown in the following description. The same components are denoted by the same reference numerals in the drawings. The drawings are not drawn according to the actual proportions.

[0030] Figure 1 A sectional view of an embodiment of an outer-rotor magnetic bearing of the present application;

[0031] Figure 2 A sectional view of an embodiment of an inner-stator assembly of an outer-rotor magnetic bearing of the present application;

[0032] Figure 3 A partial sectional view of an embodiment of an outer-rotor assembly of an outer-rotor magnetic bearing of the present application;

[0033] Figure 4 A partial structural sectional view of an outer-rotor magnetic bearing of the present application;

[0034] Figure 5 Another sectional view of an embodiment of an outer-rotor magnetic bearing of the present application. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments only represent some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without any creative effort fall within the scope of the present application.

[0036] It should be noted that when an element is referred to as being "fixed" or "set" on another element, it can be directly on the other element or can have a middle element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or can have a middle element.

[0037] It should be further noted that if the present application embodiments involve directionality indications, such as up, down, left, right, front, back, etc., the directionality indications are only used to explain the relative position relationship between the components, the movement, etc. in a certain posture, and if the posture changes, the directionality indications will also change accordingly. In addition, if the present application embodiments involve descriptions such as "first, second", "S1, S2", "step one, step two" and the like, such descriptions are only for description purposes, and cannot be understood as indicating or implying the relative importance of the technical features indicated or the number of technical features indicated or the execution order of the method, etc. Those skilled in the art can understand that any change within the technical concept of the application without deviating from the technical concept of the application should be included in the protection scope of the application.

[0038] The application provides an outer rotating magnetic suspension bearing, referring to Figures 1-4 , comprising: an inner stator assembly 1 and an outer rotor assembly 2.

[0039] The inner stator assembly comprises: a fixed inner ring 11, a suspension magnet 12 and a traction magnet 13.

[0040] The suspension magnet 12 is arranged on the outer side edge of the fixed inner ring 11, is symmetrically arranged along the circumferential direction of the fixed inner ring 11, and the top of each suspension magnet 12 is concave to form a first groove 14, and the two side edges of the first groove 14 are oppositely inclined.

[0041] The traction magnet 13 is arranged in the first groove 14, and is used for realizing the radial suspension and rotation traction of the outer rotor assembly 2.

[0042] The outer rotor assembly 2 comprises: a rotating body 21, a first magnet 22 and a second magnet 23.

[0043] The rotating body 21 is arranged around the outside of the fixed inner ring 11, is coaxial with the fixed inner ring 11 and is rotatably arranged.

[0044] The first magnet 22 is correspondingly arranged on the suspension magnet 12, and is in a wedge-shaped structure, extends into the corresponding first groove 14, and forms a same-level magnetic pole pair with the inclined surface of the first groove 14, and is used for realizing the axial and radial suspension.

[0045] The second magnet 23 is arranged on the top of the first magnet 22, forms a same-level magnetic pole pair with the traction magnet 13, and is used for providing the radial suspension and traction of the outer rotor assembly 2.

[0046] In this embodiment, an outer rotating magnetic suspension bearing is given, the inner stator assembly is fixed in the equipment shell or shafting structure as a stationary part; the outer rotor assembly is sleeved outside the fixed inner ring to realize high efficiency and low friction rotation as a rotating part. When running, the repulsion force between the suspension magnets and the first magnets forms a suspension force field in the radial and axial directions under the guidance of the first groove inclined structure, so that the outer rotor assembly is in a non-contact suspension state; the first magnet is in a wedge-shaped structure and is deeply arranged in the first groove, and a stable magnetic repulsion angle is formed between the first magnet and the groove inclined surface, which effectively improves the distribution stability of the suspension force. At the same time, the traction magnet and the second magnet above it form a same-stage magnetic pole pair, which exerts an additional traction force in the radial direction, provides a radial centering restraint effect, and at the same time realizes an auxiliary rotating traction effect, ensuring the dynamic stability in the rotating process. Since the entire bearing does not need traditional mechanical contact, non-friction support and rotation are realized through a magnetic field, and the outer rotor assembly rotates around the inner stator, so that the rotating radius is larger under the same mass, effectively improving the overall rotational inertia of the system, and it is suitable for scenes such as fans, flywheel energy storage, outer rotating motors and other scenes with high requirements for rotational inertia. At the top of the suspension magnet, a first groove with a relative inclination is designed, and a wedge-shaped first magnet is inserted into the groove, and the same-stage magnetic pole pair produces a resultant force along the inclined direction, which is decomposed into an axial force and a radial force, thereby realizing a group of magnet structures that complete bidirectional suspension positioning on the structure. Compared with the traditional design of independently setting axial magnets and radial magnets, the present application greatly simplifies the structure, reduces the number of components and control complexity. The second magnet is arranged on the top of the first magnet and forms a same-stage magnetic pole pair with the traction magnet arranged inside the groove, effectively exerting an additional stable traction and reset force in the radial direction to prevent eccentric displacement or vortex vibration of the outer rotor during rotation. Without the need for external large sensors or active controllers, the suspension and rotation functions can be realized. In summary, the outer rotating magnetic suspension bearing provided by the present application has compact structure, high reliability, and has the characteristics of outer rotating layout, can realize axial and radial suspension at the same time, and meets the use needs of high inertia systems.

[0047] Preferably, the traction magnet is a fixedly installed electromagnet winding;

[0048] The second magnet is a permanent magnet;

[0049] The electromagnet winding and the second magnet arranged on the rotor assembly are oppositely arranged to constitute a stator-rotor magnetic field system of a permanent magnet synchronous motor.

[0050] In this embodiment, the traction magnet is designed as a stator electromagnetic winding, and the second magnet is a permanent magnet, which is not only used for radial suspension control, but also has the function of synchronous motor excitation. Under the condition of energization, through precise current control, not only can the second magnet provide radial traction, but also can generate a rotating magnetic field to drive the rotor to rotate, realizing that a set of electromagnetic structure completes two functions. The traction magnet and the motor stator are combined into one, which not only has support and drive in the same structure, but also significantly reduces the number of components and assembly difficulty, especially suitable for lightweight and high integration occasions (such as flywheel energy storage, electric fan, magnetic shaft pump, etc.). In addition, the bearing can also be used for power generation. When the outer rotor assembly is driven to rotate by the outside, the electromagnetic winding cuts the magnetic induction lines of the second magnet to realize the function of power generation.

[0051] More preferably, the outer rotor assembly is connected to a flywheel or an energy storage turntable with rotational inertia, and the rotating body is integrally formed with the first magnet and the second magnet for storing kinetic energy; the electromagnetic winding (traction magnet) provided in the inner stator assembly forms a rotating magnetic field under the condition of energization, which not only drives the outer rotor to rotate at high speed, but also cuts the magnetic lines in the opposite direction to realize power generation during flywheel deceleration or power failure, outputting electric energy and constituting a bidirectional energy conversion device.

[0052] Preferably, the traction magnet is a fixedly installed three-phase electromagnetic winding.

[0053] Each phase of the three-phase electromagnetic winding is uniformly distributed in the inner circle of the fixed ring, and each phase of the electromagnetic winding is arranged opposite to the second magnet to constitute the stator and rotor magnetic field system of the permanent magnet synchronous motor.

[0054] In this embodiment, the traction magnet is a three-phase electromagnetic winding fixedly installed in the inner circle of the fixed ring. Compared with the two-phase winding, the magnetic field is more uniform and stable, making the traction rotation of the outer rotor assembly more stable, which can effectively reduce the operation vibration, and is suitable for three-phase power supply in industrial production, further improving the application range of the bearing. For example, referring to Figure 4 , the second magnets 23 are uniformly distributed on the inner side of the rotating body 21, and the number is 12. The traction magnet includes four groups of three-phase electromagnetic windings, and the electromagnetic windings correspond to the second magnets one by one to achieve better traction effect.

[0055] Preferably, referring to Figure 4 , the bottom of the first groove 14 of the suspension magnet is inwardly recessed to form a second groove 15; the electromagnetic winding is arranged in the second groove 15. In this structure, the electromagnetic winding is embedded in the second groove, which improves the fixing effect of the electromagnetic winding and makes the electromagnetic structure more integrated, occupying less space, which helps to reduce the outer diameter of the bearing.

[0056] Preferably, referring to Figure 3 and Figure 4, the first magnet 22 is concave on top, forming a third groove 24 corresponding to the second groove 15; the second magnet 23 is arranged inside the third groove 24.

[0057] In this embodiment, the second magnet is arranged in a nested manner with the first magnet, which can avoid the second magnet from protruding and further improve the firmness of installation, especially avoiding falling off during high-speed rotation. Moreover, the nested arrangement of the second magnet in the third groove saves the stacking height of the magnets, which is conducive to realizing a more compact bearing structure. In addition, the second groove corresponds to the third groove, so that the second magnet is closer to the traction magnet, and the magnetic circuit is shortened, so that the magnetic coupling between the second magnet and the traction magnet is more compact, further improving the traction effect. More preferably, referring to Figure 3 and Figure 4 , the second magnet 23 partially protrudes from the third groove 24, achieving a more compact structure with the electromagnet winding, and further improving the magnetic coupling effect between the second magnet and the traction magnet.

[0058] Preferably, referring to Figure 1 and Figure 2 , the inner stator assembly 1 further comprises a transverse stop 16 arranged up and down along the circumferential direction of the fixed inner ring 11;

[0059] The transverse stop 16 partially covers the rotating body 21, which is used to limit the radial displacement of the outer rotor assembly 2.

[0060] In this embodiment, in the circumferential direction of the fixed inner ring, the transverse stop is additionally arranged, which can play a physical limiting protection role in the case of electromagnetic suspension instability or external disturbance, preventing the outer rotor from occurring large deflection; even if the suspension magnetic force fluctuates temporarily, the transverse stop can also serve as a mechanical safety structure to ensure the safe operation of the overall device.

[0061] More preferably, referring to Figure 1 , the outer-rotor magnetic suspension bearing further comprises a brake clamp 3 arranged between the transverse stop 16 and the outer rotor assembly 2;

[0062] One end of the brake clamp 3 is fixed on the transverse stop 16, and the other end is telescopically abutted against the side surface of the outer rotor assembly 2.

[0063] In this embodiment, one end of the brake clamp is fixed on the transverse stop, when the outer rotor assembly needs to rotate, the brake clamp is automatically or controlled to retract, and the contact with the side surface of the outer rotor assembly is released, so that the outer rotor assembly is in a free suspension state and can rotate normally; when it is necessary to stop rotation or perform position locking, the brake clamp is extended and contacts the side surface of the outer rotor assembly, thereby realizing mechanical braking and position keeping of the rotor. The addition of the brake clamp not only can lock and limit the rotor in the non-working state, avoiding misrotation or inertial sliding, but also can provide emergency braking protection in special working conditions.

[0064] Preferably, referring to Figure 4 , a plurality of first mounting grooves 17 are symmetrically arranged at the circumferential direction of the fixed inner ring 11; the levitation magnet 12 is completely embedded in the first mounting groove 17. Further, for the traction magnet and the levitation magnet, a stable assembly space is provided to realize the stable suspension of the outer rotor assembly.

[0065] More preferably, referring to Figure 3 , the rotating body 21 comprises a rotor base 21a and an outer rotor connecting piece 21b;

[0066] The rotor base 21a is annular, and a second mounting groove is arranged at the top for mounting the outer rotor connecting piece 21b, and the bottom of the rotor base 21b is connected with the first magnet 22;

[0067] The bottom part of the outer rotor connecting piece 21b is embedded in the second mounting groove, and the top is used for mounting the outer rotor load structure or as the output end of the rotating shaft.

[0068] In this embodiment, by connecting the rotor base annular body with the first magnet, and embedding the outer rotor connecting piece in the second mounting groove arranged at the top, the overall rigid connection of the rotor assembly is realized, the structural stability and assembly convenience are improved, and the outer rotor connecting piece can directly bear the load or serve as the output shaft, thereby improving the system integration and operation reliability. More preferably, the rotor base is made of aluminum alloy, which has the advantages of light weight, high strength and good heat dissipation performance, which helps to reduce the overall weight of the rotor, improve the rotation efficiency, and effectively improve the heat management capability and operation stability of the system.

[0069] The application also provides a generator comprising the above-mentioned outer-rotor magnetic suspension bearing; wherein the second magnet of the outer-rotor magnetic suspension bearing is a permanent magnet, and the traction magnet is an electromagnet winding; through the rotation of the outer rotor assembly, the traction magnet (electromagnet winding) cuts the magnetic induction lines of the second magnet, thereby realizing the efficient conversion of mechanical energy into electrical energy. At the same time, the magnetic suspension structure realizes the non-contact suspension of the rotor, significantly reduces the mechanical friction and energy loss, and improves the efficiency and reliability of the generator.

[0070] The above-mentioned generator is based on the above-mentioned outer-rotor magnetic suspension bearing, and the combination of technical effects and technical features is not described here. The above-mentioned embodiments only express several embodiments of the application, and the description is more specific and detailed, but it cannot be understood as a limitation on the scope of the invention. It should be pointed out that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the protection scope of the present application.

Claims

1. An externally rotating magnetic levitation bearing, characterized in that, include: Inner stator assembly and outer rotor assembly; The inner stator assembly includes: a fixed inner ring, a levitation magnet, and a traction magnet; The levitation magnets are arranged symmetrically at intervals along the circumference of the fixed inner ring on the outer edge of the fixed inner ring, and the top of each levitation magnet is concave to form a first groove, with the two sides of the first groove being relatively inclined. The traction magnet is set in the first groove to achieve radial suspension and rotational traction of the external rotor assembly; The outer rotor assembly includes: a rotating body, a first magnet, and a second magnet; The rotating body is arranged around the outside of the fixed inner ring, coaxial with the fixed inner ring and rotatable; The first magnet is disposed one-to-one with the levitation magnet and has a wedge-shaped structure. It extends into the corresponding first groove and forms a pair of magnetic poles of the same level with the inclined surface of the first groove, which is used to achieve axial and radial levitation. The second magnet is positioned on top of the first magnet, forming a pole pair with the traction magnet, and is used to provide radial suspension and traction for the outer rotor assembly.

2. The externally rotating magnetic levitation bearing according to claim 1, characterized in that, The levitation magnet is a fixedly installed electromagnet winding; The second magnet is a permanent magnet; The electromagnet windings and the second magnets mounted on the rotor assembly are arranged opposite to each other to form the stator and rotor magnetic field system of the permanent magnet synchronous motor.

3. The externally rotating magnetic levitation bearing according to claim 2, characterized in that, The traction magnet is a fixedly installed three-phase electromagnet winding; Each phase of the three-phase electromagnet winding is evenly distributed within the fixed coil, and each phase electromagnet winding is respectively positioned opposite to the second magnet, forming the stator and rotor magnetic field system of the permanent magnet synchronous motor.

4. The externally rotating magnetic levitation bearing according to claim 2, characterized in that, The bottom of the first groove of the levitation magnet is recessed inward to form a second groove; the electromagnet winding is set in the second groove.

5. The externally rotating magnetic levitation bearing according to claim 4, characterized in that, The top of the first magnet is recessed to form a third groove corresponding to the second groove; the second magnet is disposed inside the third groove.

6. The externally rotating magnetic levitation bearing according to claim 1, characterized in that, The inner stator assembly also includes transverse stops disposed vertically along the circumference of the fixed inner ring; The lateral stop covers the rotating body and is used to limit the radial displacement of the outer rotor assembly.

7. The externally rotating magnetic levitation bearing according to claim 6, characterized in that, It also includes a brake caliper positioned between the lateral stop and the outer rotor assembly; One end of the brake caliper is fixed to the lateral stop, and the other end is retractable and abuts against the side of the outer rotor assembly.

8. The externally rotating magnetic levitation bearing according to claim 1, characterized in that, Multiple first mounting slots are symmetrically arranged at intervals along the circumference of the fixed inner ring; the levitation magnet is completely embedded in the first mounting slot.

9. The externally rotating magnetic levitation bearing according to claim 1, characterized in that, The rotating body includes: a rotor base and an outer rotor connector; The rotor base is annular, with a second mounting groove at the top for mounting the outer rotor connector, and the bottom of the rotor base is connected to the first magnet; The bottom part of the outer rotor connector is embedded in the second mounting groove, and the top is used to install the outer rotor load structure or as the output end of the rotating shaft.

10. A generator, characterized in that, Including the external rotating magnetic levitation bearing as described in any one of claims 2-5.

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