CN110829713A

CN110829713A - Magnetic suspension motor and air conditioner

Info

Publication number: CN110829713A
Application number: CN201911120486.1A
Authority: CN
Inventors: 伍尚权; 王周叶; 龚敏; 林学明
Original assignee: Gree Electric Appliances Inc of Zhuhai; Zhuhai Kaibang Motor Manufacture Co Ltd
Current assignee: Gree Electric Appliances Inc of Zhuhai; Zhuhai Kaibang Motor Manufacture Co Ltd
Priority date: 2019-11-15
Filing date: 2019-11-15
Publication date: 2020-02-21

Abstract

The application provides a magnetic suspension motor and an air conditioner. This magnetic suspension motor includes the casing, rotor subassembly (1), stator module (2), main shaft (3), mounting bracket (4), radial magnetic suspension bearing (5) and axial bearing, mounting bracket (4) are fixed to be set up on the casing, radial magnetic suspension bearing (5) fixed mounting is on mounting bracket (4), rotor subassembly (1) cover is established in radial magnetic suspension bearing (5) periphery, stator module (2) cover is established in rotor subassembly (1) periphery, main shaft (3) set up the axial outside in rotor subassembly (1), and with rotor subassembly (1) fixed connection, axial bearing is used for adjusting the axial position of main shaft (3), radial magnetic suspension bearing (5) are used for adjusting the radial position of rotor subassembly (1). According to the magnetic suspension motor, the size of the whole motor in the axial direction can be reduced, so that the magnetic suspension motor can be applied to special occasions such as narrow space and the like, and the application range of the motor is widened.

Description

Magnetic suspension motor and air conditioner

Technical Field

The application relates to the technical field of motor equipment, in particular to a magnetic suspension motor and an air conditioner.

Background

The magnetic suspension motor is a bearing with low loss and high performance, which utilizes the electromagnetic force action of a magnetic suspension bearing to suspend a motor rotor in the air, so that the motor rotor is not in mechanical contact with a motor stator and has no mechanical friction. The high-speed rotation of the motor rotor is realized, and the magnetic suspension motor rotor has the advantages of no mechanical abrasion, low energy consumption, low noise, long service life, no lubrication and sealing, no oil pollution and the like, and the rotation speed of the magnetic suspension motor rotor is only limited by the tensile strength of a rotor material, so that the peripheral speed of the magnetic suspension motor rotor can be very high, and the magnetic suspension motor rotor is more and more widely applied to high-speed equipment.

The magnetic suspension motor is generally provided with 2 radial magnetic bearings and 1 pair of axial magnetic bearings, and a motor stator and a rotor are added, so that the size of the whole machine in the axial direction is large, the magnetic suspension motor cannot be applied to special occasions with narrow space, and the application range is limited.

Disclosure of Invention

Therefore, the technical problem that this application will be solved lies in providing a magnetic suspension motor and air conditioner, can reduce the ascending size of motor complete machine in the axial direction, makes it can be applied to special occasions such as narrow and small space, improves the application scope of motor.

In order to solve the above problem, the application provides a magnetic suspension motor, which comprises a housin, the rotor subassembly, stator module, the main shaft, the mounting bracket, radial magnetic suspension bearing and axial bearing, the mounting bracket is fixed to be set up on the casing, radial magnetic suspension bearing fixed mounting is on the mounting bracket, the rotor subassembly cover is established in radial magnetic suspension bearing periphery, stator module cover is established in the rotor subassembly periphery, the main shaft sets up the axial outside at the rotor subassembly, and with rotor subassembly fixed connection, axial bearing is used for adjusting the axial position of main shaft, radial magnetic suspension bearing is used for adjusting the radial position of rotor subassembly.

Preferably, the radial magnetic suspension bearing comprises a radial iron core and radial windings, the radial iron core is mounted on the mounting frame, two axial end faces of the radial iron core are flush with two axial end faces of the rotor assembly, the radial windings are wound on the radial iron core along the axial direction, and the radial windings are uniformly distributed along the circumferential direction of the radial iron core.

Preferably, a first stop projection is provided on the mounting bracket, and the first stop projection is used for limiting the axial mounting position of the radial magnetic bearing on the mounting bracket.

Preferably, the mounting bracket comprises a mounting shaft, the mounting shaft penetrates through the inner peripheral side of the radial magnetic suspension bearing, and one end of the mounting shaft is fixedly arranged on the shell.

Preferably, the housing is provided with a projection projecting axially in a direction away from the radial magnetic suspension bearing, a mounting groove is formed in the back side of the projection, and the mounting shaft is mounted in the mounting groove.

Preferably, one end of the main shaft close to the rotor assembly is fixedly provided with a thrust disc, the outer peripheral side of the thrust disc far away from the main shaft is fixedly provided with an axial connecting piece extending towards the rotor assembly, the tail end of the axial connecting piece is provided with an end face connecting piece, and the end face connecting piece is fixedly connected to the end face of the rotor assembly.

Preferably, the end face connector is an annular disc-shaped structure with a shape matched with that of the end face of the rotor assembly, and the end face connector and the rotor assembly are welded or fixed in a threaded mode.

Preferably, the axial connector is a cylindrical or rod-like structure.

Preferably, the axial bearing includes a first bearing portion and a second bearing portion, the first bearing portion is fixedly disposed on the mounting bracket, the second bearing portion is fixedly disposed on the housing, and the thrust disk is located between the first bearing portion and the second bearing portion.

Preferably, the thrust disk is provided at an end face position of the main shaft and forms an integral structure with the main shaft.

Preferably, the casing includes a front casing and a rear casing, the front casing and the rear casing are of a split structure and are fixedly connected together, the mounting frame is arranged on the rear casing, and the stator assembly is mounted on the front casing.

Preferably, the front casing includes a stepped end cover extending from the outer peripheral side to the inner peripheral side along the axial direction toward the direction away from the rotor core, the end cover includes a first end wall, a second end wall, a third end wall and a fourth end wall sequentially arranged along the axial direction away from the rotor core, and adjacent end walls are fixedly connected through an axial connecting section.

Preferably, a first step is formed between the first end wall and the second end wall, the first end wall is attached to the end wall of the stator assembly, a first step groove is formed between the second end wall and the end wall of the stator assembly, the stator assembly comprises a stator winding, and the stator winding is arranged in the first step groove.

Preferably, a second stepped groove is formed between the second end wall and the third end wall, and when the magnetic levitation motor includes a thrust disk and an axial connector, the thrust disk and the axial connector are disposed axially inside the second stepped groove, and the axial connector is located radially inside an axial connection section between the second end wall and the third end wall.

Preferably, when the motor includes the second bearing portion, a radially outer wall of the second bearing portion is fitted to a radially inner wall of the axial connecting section between the third end wall and the fourth end wall, and an axially outer wall of the second bearing portion is fitted to an axially inner wall of the fourth end wall.

According to another aspect of the present application, there is provided an air conditioner including a magnetic levitation motor as described above.

The application provides a magnetic suspension motor, which comprises a housin, the rotor subassembly, stator module, the main shaft, the mounting bracket, radial magnetic suspension bearing and axial bearing, the mounting bracket is fixed to be set up on the casing, radial magnetic suspension bearing fixed mounting is on the mounting bracket, the rotor subassembly cover is established in radial magnetic suspension bearing periphery, the stator module cover is established in the rotor subassembly periphery, the main shaft sets up the axial outside at the rotor subassembly, and with rotor subassembly fixed connection, the axial bearing is used for adjusting the axial position of main shaft, radial magnetic suspension bearing is used for adjusting the radial position of rotor subassembly. In this magnetic suspension motor, set up the main shaft in the axial outside of rotor subassembly, then set up radial magnetic suspension bearing in the week side of rotor subassembly, thereby make the position that sets up of radial magnetic suspension and the position that sets up of rotor subassembly coincide in the axial, thereby can not influence the torque output of rotor subassembly, reduce the axial length of main shaft simultaneously, and then reduce whole magnetic suspension motor's axial dimensions, optimize overall structure, reduce the whole axial dimensions of complete machine, make magnetic suspension motor can conveniently be applied to the narrow and small application scenario that needs big inertia again in space, improve the application scope of motor.

Drawings

Fig. 1 is a schematic longitudinal sectional structure of a magnetic levitation motor according to an embodiment of the present application;

fig. 2 is a schematic cross-sectional structure diagram of a magnetic levitation motor according to an embodiment of the present application.

The reference numerals are represented as:

1. a rotor assembly; 2. a stator assembly; 3. a main shaft; 4. a mounting frame; 5. a radial magnetic suspension bearing; 6. a first stopper projection; 7. a bump; 8. mounting grooves; 9. a thrust plate; 10. an axial connector; 11. an end face connector; 12. a first bearing portion; 13. a second bearing portion; 14. a front housing; 15. a rear housing; 16. a first end wall; 17. a second end wall; 18. a third end wall; 19. a fourth end wall; 20. a second stopping projection.

Detailed Description

Referring to fig. 1 to 2 in combination, according to an embodiment of the present application, the magnetic levitation motor includes a housing, a rotor assembly 1, a stator assembly 2, a spindle 3, a mounting bracket 4, a radial magnetic levitation bearing 5, and an axial bearing, the mounting bracket 4 is fixedly disposed on the housing, the radial magnetic levitation bearing 5 is fixedly disposed on the mounting bracket 4, the rotor assembly 1 is sleeved on the periphery of the radial magnetic levitation bearing 5, the stator assembly 2 is sleeved on the periphery of the rotor assembly 1, the spindle 3 is disposed on an axial outer side of the rotor assembly 1 and is fixedly connected to the rotor assembly 1, the axial bearing is used for adjusting an axial position of the spindle 3, and the radial magnetic levitation bearing 5 is used for.

In this magnetic suspension motor, set up main shaft 3 in the axial outside of rotor subassembly 1, then set up radial magnetic suspension bearing 5 in rotor subassembly 1's week side, thereby make the position that sets up of radial magnetic suspension and rotor subassembly 1's the position that sets up coincide in the axial, thereby can not influence rotor subassembly 1's torque output, reduce main shaft 3's axial length simultaneously, and then reduce whole magnetic suspension motor's axial dimensions, optimize overall structure, reduce the whole axial dimensions of complete machine, make magnetic suspension motor can conveniently be applied to the narrow and small application scenario that needs big inertia again in space, the application scope of motor is improved.

In the application, because the main shaft 3 is not necessarily located at the inner peripheral side of the rotor assembly 1, as long as the torque of the rotor assembly 1 can be smoothly output to the main shaft 3, the main shaft can be reformed by using the characteristics, on the basis of not increasing the length of the main shaft 3, the connecting position of the rotor assembly 1 and the main shaft 3 is changed, so as to make the position located at the inner peripheral side of the rotor assembly 1, because the radial magnetic suspension bearing 5 is arranged along the axial direction of the main shaft 3, and the axial part of the rotor assembly 1 is inevitably present, the space generated at the inner periphery of the rotor assembly 1 by the structural change of the main shaft 3 can be used for arranging the radial magnetic suspension bearing 5, thereby ensuring the radial support of the radial magnetic suspension bearing 5 on the rotor assembly 1, not occupying extra axial space, and making the total axial length of the magnetic suspension motor mainly determined by the rotor assembly 1 and the main shaft 3, the axial section required by the radial magnetic suspension bearing 5 is omitted, so that the overall axial size of the magnetic suspension motor can be greatly reduced, the overall size of the motor is reduced under the condition of not changing the output torque of the motor, and the motor can meet the use requirement under the complex environment. In addition, since the axial length of the spindle 3 is greatly reduced, the cost of the motor can be greatly reduced.

In this application, radial magnetic suspension bearing 5 includes radial iron core and radial winding, and radial iron core installs on mounting bracket 4, and two axial terminal surfaces of radial iron core flush with two axial terminal surfaces of rotor subassembly 1, and radial winding is along the axial coiling on radial iron core, and radial winding is along the circumference evenly distributed of radial iron core to can form even radial effort in rotor subassembly 1's circumference, make rotor subassembly 1 conveniently form radial balance more, improve the stability of magnetic suspension motor during operation. Current is passed through the radial windings to provide electromagnetic force for the radial magnetic suspension bearing 5, and a radial bearing electromagnetic circuit is formed between the radial iron core and the radial air gap and the rotor assembly 1, so that the rotor assembly 1 is suspended in the radial direction.

The radial iron core is composed of silicon steel sheet laminations with strong magnetic conductivity, and the adoption of the lamination mode is favorable for reducing eddy current loss and improving efficiency; and a groove is formed in the lamination, and a radial winding wound by an enameled wire is arranged in the groove and used for providing an electromagnetic field to form a radial bearing stator.

In this application, two axial terminal surfaces of radial iron core flush with two axial terminal surfaces of rotor subassembly 1, consequently can guarantee that the magnetic field that radial winding formed forms radial effort in rotor subassembly 1's whole axial, be favorable to realizing rotor subassembly 1's radial balance more, simultaneously, radial magnetic suspension bearing 5 of this application arranges in rotor subassembly 1's interior circle center, can adopt single radial magnetic suspension bearing 5 to realize rotor subassembly 1's radial suspension, effectively reduce the axial dimension of complete machine, improve the assembly precision, practice thrift a radial magnetic suspension bearing 5's cost simultaneously.

In other embodiments, at least two radial magnetic bearings 5 may be axially spaced in the inner bore of the rotor assembly 1, and also no extra axial length is occupied, so that the axial size of the whole machine can be reduced while providing radial suspension force for the rotor assembly 1.

The whole radial magnetic suspension bearing 5 is fixed in the shell through the mounting frame 4, and provides a basic supporting effect for the whole structure.

The stator core of the stator component 2 is formed by stacking electrical silicon wafers and is fixedly arranged on the front shell, and the motor winding is wound in the stator core to provide a rotary driving force for the rotor component 1; an electromagnetic circuit of the motor is formed by the stator core, the motor air gap and the rotor assembly 1, so that the rotor rotates in the circumferential direction.

A first stop projection 6 is provided on the mounting frame 4, the first stop projection 6 being used to define the axial mounting position of the radial magnetic bearing 5 on the mounting frame 4. The first stop bulge 6 is an annular bulge, and can be used for effectively positioning the radial magnetic suspension bearing 5 on the mounting frame 4 in the axial direction, so that the mounting accuracy and the mounting efficiency of the radial magnetic suspension bearing 5 are ensured.

The mounting bracket 4 comprises a mounting shaft, the mounting shaft penetrates through the inner peripheral side of the radial magnetic suspension bearing 5, and one end of the mounting shaft is fixedly arranged on the shell. In this application, mounting bracket 4 adopts the structural style of installation axle, can facilitate the processing of installation axle, improves machining efficiency, also conveniently carries out the installation of radial magnetic suspension bearing 5 on mounting bracket 4 simultaneously. Preferably, in order to ensure the stability and reliability of the mounting structure of the mounting bracket 4 on the casing, the mounting shaft may include a rotation-preventing section having a rotation-preventing cut edge and a cylindrical section, or a polygonal structure, the cylindrical section is integrated with the rotation-preventing section and located on the inner peripheral side of the rotor assembly 1, the rotation-preventing section is fixedly mounted on the casing, and the radial magnetic suspension bearing 5 is mounted on the cylindrical section.

The shell is provided with a convex block 7 which axially protrudes in the direction away from the radial magnetic suspension bearing 5, the back side of the convex block 7 is provided with a mounting groove 8, and the mounting shaft is mounted in the mounting groove 8. Through set up lug 7 on the casing to set up in lug 7 along axially extended mounting groove 8, can improve the axial fit length between installation axle and the casing, improve the casing to the support intensity of installation axle, and then guarantee that the installation axle is to radial magnetic suspension bearing 5's support intensity and structural stability.

In this embodiment, a thrust disk 9 is fixedly disposed at one end of the main shaft 3 close to the rotor assembly 1, an axial connecting member 10 extending toward the rotor assembly 1 is fixedly disposed at an outer peripheral side of the thrust disk 9 away from the main shaft 3, an end face connecting member 11 is disposed at a terminal end of the axial connecting member 10, and the end face connecting member 11 is fixedly connected to an end face of the rotor assembly 1. The thrust disc 9 is as connecting the partly of main shaft 3 and rotor subassembly 1, can realize the fixed connection between main shaft 3 and the rotor subassembly 1, can also regard as axial bearing's effect object simultaneously, realizes the regulation to the axial position of main shaft 3, consequently can further shorten magnetic levitation motor's axial dimension, is favorable to magnetic levitation motor's flattening, saves the copper line, and the heat dissipation is better.

The end face connecting piece 11 is an annular disc-shaped structure with the shape matched with that of the end face of the rotor assembly 1, and the end face connecting piece 11 and the rotor assembly 1 are welded or screwed and fixed. The end face connecting piece 11 is used for realizing fixed connection between the end face of the rotor assembly 1, so that the rotor assembly 1 can transmit torque to the main shaft 3 conveniently, and further the torque is output through the main shaft 3. The end face connecting piece 11 can be an annular disc-shaped structure and is fixedly connected with the end face of the rotor assembly 1 well, and also can be a plurality of plate-shaped structures arranged at intervals along the circumferential direction, each plate-shaped structure is fixedly connected with the rotor assembly 1 at the arrangement position of the plate-shaped structure, and then the fixed connection between the rotor assembly 1 and the main shaft 3 is realized on the whole.

The axial connector 10 is of a cylindrical or rod-like configuration. When the end face connection member 11 is an annular disk-shaped structure, the axial connection member 10 may be a cylindrical structure, and when the end face connection member 11 is a plate-shaped structure circumferentially spaced, the axial connection member 10 may be a rod-shaped structure, one rod for each plate, or a plurality of rods for each plate.

The axial bearing comprises a first bearing part 12 and a second bearing part 13, the first bearing part 12 is fixedly arranged on the mounting frame 4, the second bearing part 13 is fixedly arranged on the shell, and the thrust disc 9 is positioned between the first bearing part 12 and the second bearing part 13. The first bearing portion 12 and the second bearing portion 13 each include an iron core and a winding, wherein the first bearing portion 12, the axial air gap, and the thrust disk 9 form a first electromagnetic circuit for applying an axial force to the spindle 3 to move in a first direction, and the second bearing portion 13, the axial air gap, and the thrust disk 9 form a second electromagnetic circuit for applying an axial force to the spindle 3 to move in a second direction, the first direction being opposite to the second direction. By adjusting the magnitude of the winding currents of the first bearing portion 12 and the second bearing portion 13, it is possible to adjust the magnitude of the electromagnetic force output by the first bearing portion 12 and the second bearing portion 13, and thus to adjust the position of the thrust disk 9 in the axial direction, so that the thrust disk 9 is suspended at the preset position in the axial direction.

Preferably, the thrust disk 9 is disposed at an end face of the spindle 3 and forms an integrated structure with the spindle 3, so that on one hand, a molding process can be reduced, molding difficulty can be reduced, on the other hand, strength of a connection structure between the thrust disk 9 and the spindle 3 can be effectively ensured, and consistency of structures of the spindle 3 and the thrust disk 9 can be improved.

The casing includes preceding casing 14 and back casing 15, and preceding casing 14 and back casing 15 are the components of a whole that can function independently structure, and fixed connection is in the same place, and mounting bracket 4 sets up on back casing 15, and stator module 2 installs on preceding casing 14. Through dividing into preceding casing 14 and back casing 15 with the casing, can make the casing form split type structure to can enough reduce the processing degree of difficulty of casing, also can conveniently carry out the installation of each inside part of casing simultaneously and fix.

The front casing 14 includes a stepped end cover extending from an outer peripheral side to an inner peripheral side along an axial direction toward a direction away from the rotor core, the end cover includes a first end wall 16, a second end wall 17, a third end wall 18, and a fourth end wall 19 arranged in sequence along the axial direction away from the rotor core, and adjacent end walls are fixedly connected by an axial connecting section.

A first step is formed between the first end wall 16 and the second end wall 17, the first end wall 16 is attached to the end wall of the stator assembly 2, a first step groove is formed between the second end wall 17 and the end wall of the stator assembly 2, the stator assembly 2 comprises a stator winding, and the stator winding is arranged in the first step groove. The first end wall 16 is attached to the end wall of the stator assembly 2, so that the front casing 14 and the stator assembly 2 can be matched more tightly, and the stability and reliability of the installation structure of the stator assembly 2 on the front casing 14 are ensured. Set up stator winding in first step inslot, can enough guarantee the closely cooperation between stator module 2 and the casing, the structure of rational in infrastructure design casing of make full use of stator module 2 again for the structure of casing can obtain make full use of, conveniently carries out stator winding's installation setting.

A second stepped groove is formed between the second end wall 17 and the third end wall 18, when the magnetic suspension motor comprises the thrust disk 9 and the axial connector 10, the thrust disk 9 and the axial connector 10 are arranged at the axial inner side of the second stepped groove, and the axial connector 10 is arranged at the radial inner side of the axial connecting section between the second end wall 17 and the third end wall 18. Since the axial length of the axial connector 10 exceeds a certain distance relative to the thickness of the stator winding, if the second end wall 17 extends radially to the position of the axial connector 10, interference will occur between the second end wall 17 and the axial connector 10, and at this time, a third end wall 18 with a larger axial distance relative to the second end wall 17 is formed on the housing, so that a sufficient axial distance can be formed between the third end wall 18 and the rotor assembly 1, the mounting requirements of the axial connector 10 and the thrust plate 9 can be met, and the volume of the housing is not increased, thereby facilitating the miniaturization and compactness of the housing.

A third stepped groove is formed between the third end wall 18 and the fourth end wall 19, when the magnetic levitation motor comprises the second bearing portion 13, the radial outer wall of the second bearing portion 13 is attached to the radial inner wall of the axial connecting section between the third end wall 18 and the fourth end wall 19, and the axial outer wall of the second bearing portion 13 is attached to the axial inner wall of the fourth end wall 19. Because the second bearing part 13 is located at the axial outer side of the thrust disk 9, when the axial distance between the third end wall 18 and the thrust disk 9 is in proper time, the distance between the second bearing part 13 and the third end wall 18 is too small, so that a sufficient installation space cannot be left between the third end wall 18 and the thrust disk 9 for installing the second bearing part 13, therefore, at this time, the fourth end wall 19 is arranged at the axial outer side of the third end wall 18, so that a sufficient space is provided between the fourth end wall 19 and the thrust disk 9 for installing the second bearing part 13, and meanwhile, an installation step can be formed by the fourth end wall 19 and the axial connecting section connected with the fourth end wall 19, so that the second bearing part 13 can be fixedly installed through the fourth end wall 19 and the axial connecting section at the same time, and the stability and reliability of the installation structure of the second bearing part 13 on the housing are improved.

For the first bearing part 12, a second stopping protrusion 20 is further disposed at one end of the mounting frame 4 close to the thrust disk 9, and the second stopping protrusion 20 can form an axial location for the mounting of the first bearing part 12 on the mounting frame 4, so as to facilitate the fixed mounting of the first bearing part 12 on the mounting frame 4.

In this application, preceding casing 14 has adopted continuous stair structure as end cover structure, can utilize the ladder groove that continuous stair structure formed to form the axial installation space that increases progressively, thereby make the end cover can satisfy the installation requirement of different inner structure, thereby effectively utilize the inner space of casing under the prerequisite that does not increase the casing volume, realize the installation of each inner structure, structural configuration is more reasonable, be favorable to realizing the miniaturization of casing more, make the structure of casing compacter, satisfy the operation requirement in narrow and small space better, output torque also can effectively be guaranteed simultaneously.

According to an embodiment of the present application, the air conditioner includes a magnetic levitation motor, which is the above-mentioned magnetic levitation motor.

It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.

The present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed. The foregoing is only a preferred embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present application, and these modifications and variations should also be considered as the protection scope of the present application.

Claims

1. A magnetic suspension motor is characterized by comprising a shell, a rotor assembly (1), a stator assembly (2), a main shaft (3), a mounting rack (4), a radial magnetic suspension bearing (5) and an axial bearing, the mounting rack (4) is fixedly arranged on the shell, the radial magnetic suspension bearing (5) is fixedly arranged on the mounting rack (4), the rotor component (1) is sleeved on the periphery of the radial magnetic suspension bearing (5), the stator component (2) is sleeved on the periphery of the rotor component (1), the main shaft (3) is arranged on the axial outer side of the rotor component (1), and is fixedly connected with the rotor component (1), the axial bearing is used for adjusting the axial position of the main shaft (3), the radial magnetic bearing (5) is used for adjusting the radial position of the rotor assembly (1).

2. The magnetic levitation motor as claimed in claim 1, wherein the radial magnetic levitation bearing (5) comprises a radial iron core and radial windings, the radial iron core is mounted on the mounting frame (4), two axial end faces of the radial iron core are flush with two axial end faces of the rotor assembly (1), the radial windings are wound on the radial iron core along the axial direction, and the radial windings are uniformly distributed along the circumferential direction of the radial iron core.

3. Magnetic levitation motor according to claim 1, characterised in that a first stop projection (6) is provided on the mounting frame (4), the first stop projection (6) being used to define the axial mounting position of the radial magnetic levitation bearing (5) on the mounting frame (4).

4. Magnetic levitation motor according to claim 1, characterised in that the mounting frame (4) comprises a mounting shaft, which is arranged through the inner circumference of the radial magnetic levitation bearing (5), one end of which is fixedly arranged on the housing.

5. Magnetic levitation motor according to claim 4, characterised in that the housing is provided with a projection (7) projecting axially away from the radial magnetic levitation bearing (5), the back side of the projection (7) being provided with a mounting groove (8), the mounting shaft being mounted in the mounting groove (8).

6. The magnetic suspension motor according to any one of claims 1 to 5, characterized in that a thrust disc (9) is fixedly arranged at one end of the main shaft (3) close to the rotor assembly (1), an axial connecting piece (10) extending towards the rotor assembly (1) is fixedly arranged at the outer peripheral side of the thrust disc (9) far away from the main shaft (3), an end face connecting piece (11) is arranged at the tail end of the axial connecting piece (10), and the end face connecting piece (11) is fixedly connected to the end face of the rotor assembly (1).

7. The magnetic levitation motor as claimed in claim 6, wherein the end face connector (11) is an annular disc-shaped structure with a shape matched with the shape of the end face of the rotor assembly (1), and the end face connector (11) and the rotor assembly (1) are welded or screwed together.

8. Magnetic levitation motor according to claim 7, wherein the axial connection (10) is of cylindrical or rod-like construction.

9. The magnetic levitation motor according to claim 6, wherein the axial bearing comprises a first bearing portion (12) and a second bearing portion (13), the first bearing portion (12) being fixedly arranged on the mounting frame (4), the second bearing portion (13) being fixedly arranged on the housing, and the thrust disc (9) being located between the first bearing portion (12) and the second bearing portion (13).

10. Magnetic levitation motor according to claim 6, characterised in that the thrust disc (9) is arranged at the location of the end face of the spindle (3) and forms an integral structure with the spindle (3).

11. Magnetic levitation motor according to any one of claims 1-5 or 7-10, wherein the housing comprises a front casing (14) and a rear casing (15), the front casing (14) and the rear casing (15) are separate structures and are fixedly connected together, the mounting frame (4) is arranged on the rear casing (15), and the stator assembly (2) is mounted on the front casing (14).

12. The magnetic levitation motor as recited in claim 11, wherein the front casing (14) comprises a stepped end cover extending from an outer circumferential side to an inner circumferential side in an axial direction away from the rotor core, the end cover comprises a first end wall (16), a second end wall (17), a third end wall (18) and a fourth end wall (19) which are sequentially arranged in the axial direction away from the rotor core, and adjacent end walls are fixedly connected through an axial connecting section.

13. Magnetic levitation electric machine according to claim 12, wherein a first step is formed between the first end wall (16) and the second end wall (17), the first end wall (16) abutting an end wall of the stator assembly (2), the second end wall (17) forming a first step slot with an end wall of the stator assembly (2), the stator assembly (2) comprising stator windings, the stator windings being arranged in the first step slot.

14. Magnetic levitation motor according to claim 12, characterised in that a second step groove is formed between the second end wall (17) and the third end wall (18), and when the magnetic levitation motor comprises a thrust disc (9) and an axial connection member (10), the thrust disc (9) and the axial connection member (10) are arranged axially inside the second step groove, and the axial connection member (10) is located radially inside an axial connection section between the second end wall (17) and the third end wall (18).

15. The magnetic levitation motor as claimed in claim 12, characterised in that a third stepped groove is formed between the third end wall (18) and the fourth end wall (19), and when the magnetic levitation motor comprises the second bearing portion (13), a radially outer wall of the second bearing portion (13) abuts a radially inner wall of an axial connection section between the third end wall (18) and the fourth end wall (19), and an axially outer wall of the second bearing portion (13) abuts an axially inner wall of the fourth end wall (19).

16. An air conditioner comprising a magnetically levitated motor, characterized in that the magnetically levitated motor is a magnetically levitated motor as claimed in any one of claims 1 to 15.