CN110829713A - Maglev motors and air conditioners - Google Patents

Abstract

The present application provides a magnetic levitation motor and an air conditioner. The magnetic suspension motor comprises a casing, a rotor assembly (1), a stator assembly (2), a main shaft (3), a mounting frame (4), a radial magnetic suspension bearing (5) and an axial bearing, and the mounting frame (4) is fixedly arranged on the On the housing, the radial magnetic suspension bearing (5) is fixedly mounted on the mounting frame (4), the rotor assembly (1) is sleeved on the outer periphery of the radial magnetic suspension bearing (5), and the stator assembly (2) is sleeved on the rotor assembly (1) ) outer circumference, the main shaft (3) is arranged on the axial outer side of the rotor assembly (1), and is fixedly connected with the rotor assembly (1), the axial bearing is used to adjust the axial position of the main shaft (3), and the radial magnetic suspension bearing (5 ) is used to adjust the radial position of the rotor assembly (1). According to the magnetic levitation motor of the present application, the size of the entire motor in the axial direction can be reduced, so that it can be applied to special occasions such as narrow spaces, and the applicable range of the motor can be improved.

Description

Maglev motors and air conditioners

technical field

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

Background technique

The magnetic suspension motor uses the electromagnetic force of the magnetic suspension bearing to suspend the motor rotor in the air, so that there is no mechanical contact between the motor rotor and the motor stator, and there is no mechanical friction. It is a low-loss, high-performance bearing. While realizing the high speed of the motor rotor, it also has the advantages of no mechanical wear, low energy consumption, low noise, long life, no need for lubrication and sealing, and no oil pollution. The rotor speed of the magnetic levitation motor is only limited by the tensile strength of the rotor material. Therefore, the circumferential speed of the rotor of the magnetic levitation motor can be very high, and it is more and more widely used in high-speed equipment.

Magnetic levitation motors are generally equipped with 2 radial magnetic bearings and 1 pair of axial magnetic bearings, plus the stator and rotor of the motor, resulting in a larger size of the whole machine in the axial direction, which cannot be applied to special occasions with small space. The scope of application is limited.

SUMMARY OF THE INVENTION

Therefore, the technical problem to be solved by the present application is to provide a magnetic levitation motor and an air conditioner, which can reduce the size of the entire motor in the axial direction, so that it can be applied to special occasions such as narrow spaces and improve the application range of the motor.

In order to solve the above problems, the present application provides a magnetic levitation motor, including a casing, a rotor assembly, a stator assembly, a main shaft, a mounting frame, a radial magnetic suspension bearing and an axial bearing, the mounting frame is fixedly arranged on the casing, and the radial magnetic suspension bearing It is fixedly installed on the mounting frame, the rotor assembly is sleeved on the outer periphery of the radial magnetic suspension bearing, the stator assembly is sleeved on the outer periphery of the rotor assembly, the main shaft is arranged on the axial outer side of the rotor assembly, and is fixedly connected with the rotor assembly, and the axial bearing is used for adjustment The axial position of the main shaft, and the radial magnetic bearing is used to adjust the radial position of the rotor assembly.

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

Preferably, the mounting frame is provided with a first stop protrusion, and the first stop protrusion is used to define an axial installation position of the radial magnetic suspension bearing on the mounting frame.

Preferably, the installation frame includes an installation shaft, the installation shaft penetrates through the inner peripheral side of the radial magnetic suspension bearing, and one end of the installation shaft is fixed on the housing.

Preferably, the housing is provided with a projection that protrudes axially in a direction away from the radial magnetic suspension bearing, the back side of the projection is provided with an installation groove, and the installation shaft is installed in the installation groove.

Preferably, a thrust plate is fixedly arranged at one end of the main shaft close to the rotor assembly, an axial connecting member extending toward the rotor assembly is fixedly disposed on the outer peripheral side of the thrust plate away from the main shaft, and an end surface connecting member is disposed at the end of the axial connecting member. The connecting piece is fixedly connected to the end face of the rotor assembly.

Preferably, the end face connecting piece is an annular disk-shaped structure whose shape matches the shape of the end face of the rotor assembly, and the end face connecting piece and the rotor assembly are fixed by welding or screwing.

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

Preferably, the axial bearing includes a first bearing part and a second bearing part, the first bearing part is fixedly arranged on the mounting frame, the second bearing part is fixedly arranged on the housing, and the thrust plate is located on the first bearing part and the second bearing part between the bearing parts.

Preferably, the thrust plate is arranged at the position of the end face 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 separate structures and are fixedly connected together, the mounting frame is arranged on the rear casing, and the stator assembly is installed on the front casing.

Preferably, the front casing includes a stepped end cover extending in an axial direction away from the rotor iron core from the outer peripheral side to the inner peripheral side, and the end cover includes first and second end covers arranged in sequence along the axial direction away from the rotor iron core The end wall, the second end wall, the third end wall and the fourth end wall, and the adjacent end walls are fixedly connected by 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 abutted with the end wall of the stator assembly, and a first stepped groove is formed between the second end wall and the end wall of the stator assembly, The stator assembly includes stator windings arranged in the first stepped slots.

Preferably, a second stepped groove is formed between the second end wall and the third end wall. When the magnetic levitation motor includes a thrust plate and an axial connecting piece, the thrust plate and the axial connecting piece are arranged in the axial direction of the second stepped groove. On the inner side, the axial connector is located radially inward of the axial connecting section between the second end wall and the third end wall.

Preferably, when the motor includes the second bearing portion, the radially outer wall of the second bearing portion is in contact with the radially inner wall of the axial connecting section between the third end wall and the fourth end wall, and the axial direction of the second bearing portion The outer wall fits with the axial inner wall of the fourth end wall.

According to another aspect of the present application, an air conditioner is provided, comprising a magnetic levitation motor, and the magnetic levitation motor is the above-mentioned magnetic levitation motor.

The magnetic levitation motor provided by this application includes a casing, a rotor assembly, a stator assembly, a main shaft, a mounting frame, a radial magnetic suspension bearing and an axial bearing. The installation frame is fixedly arranged on the casing, and the radial magnetic suspension bearing is fixedly installed on the installation frame. , the rotor assembly is sleeved on the outer periphery of the radial magnetic suspension bearing, the stator assembly is sleeved on the outer periphery of the rotor assembly, the main shaft is arranged on the axial outer side of the rotor assembly, and is fixedly connected with the rotor assembly, and the axial bearing is used to adjust the axial position of the main shaft, Radial magnetic bearings are used to adjust the radial position of the rotor assembly. In the magnetic suspension motor, the main shaft is arranged on the axial outer side of the rotor assembly, and then the radial magnetic suspension bearing is arranged on the inner peripheral side of the rotor assembly, so that the setting position of the radial magnetic suspension is axially aligned with that of the rotor assembly. Coincidence, so as not to affect the torque output of the rotor assembly, while reducing the axial length of the main shaft, thereby reducing the axial size of the entire magnetic levitation motor, optimizing the overall structure, reducing the overall axial size of the whole machine, making the magnetic levitation motor convenient It is used in applications where the space is small and large inertia is required, and the scope of application of the motor is improved.

Description of drawings

1 is a schematic diagram of a longitudinal cross-sectional structure of a magnetic levitation motor according to an embodiment of the application;

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

Reference numerals are indicated as:

1. Rotor assembly; 2. Stator assembly; 3. Main shaft; 4. Mounting frame; 5. Radial magnetic bearing; 6. First stop protrusion; 7. Bump; 8. Installation slot; 9. Thrust plate ; 10, axial connector; 11, end face connector; 12, the first bearing part; 13, the second bearing part; 14, the front casing; 15, the rear casing; 16, the first end wall; 17, the first Two end walls; 18, the third end wall; 19, the fourth end wall; 20, the second stopper protrusion.

Detailed ways

1 to 2 , according to an embodiment of the present application, a magnetic levitation motor includes a housing, a rotor assembly 1 , a stator assembly 2 , a main shaft 3 , a mounting frame 4 , a radial magnetic suspension bearing 5 and an axial bearing, and the mounting frame 4 is fixedly arranged on the housing, the radial magnetic suspension bearing 5 is fixedly installed on the mounting frame 4, the rotor assembly 1 is sleeved on the outer circumference of the radial magnetic suspension bearing 5, the stator assembly 2 is sleeved on the outer circumference of the rotor assembly 1, and the main shaft 3 is arranged on the rotor. The axial outer side of the assembly 1 is fixedly connected with the rotor assembly 1 . The axial bearing is used to adjust the axial position of the main shaft 3 , and the radial magnetic suspension bearing 5 is used to adjust the radial position of the rotor assembly 1 .

In the magnetic suspension motor, the main shaft 3 is arranged on the axial outer side of the rotor assembly 1, and then the radial magnetic suspension bearing 5 is arranged on the inner peripheral side of the rotor assembly 1, so that the setting position of the radial magnetic suspension is the same as that of the rotor assembly 1. They overlap in the axial direction, so that the torque output of the rotor assembly 1 is not affected, and the axial length of the main shaft 3 is reduced, thereby reducing the axial size of the entire magnetic levitation motor, optimizing the overall structure, and reducing the overall axial direction of the whole machine. The size of the magnetic levitation motor can be easily applied to applications where the space is small and large inertia is required, and the scope of application of the motor is improved.

In the present application, since the main shaft 3 does not have to be located on 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 modified by using this feature. On the basis of increasing the length of the main shaft 3, change the connection position of the rotor assembly 1 and the main shaft 3, so as to make way for the position on 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 rotor assembly The axial part where 1 is located is bound to exist. Therefore, the space generated by the structural change of the main shaft 3 on the inner circumference of the rotor assembly 1 can be used to set the radial magnetic suspension bearing 5, so as to ensure that the radial magnetic suspension bearing 5 has no effect on the rotor assembly 1. At the same time, it does not occupy additional axial space, so that the overall axial length of the magnetic suspension motor is mainly determined by the rotor assembly 1 and the main shaft 3, and the axial section required for setting the radial magnetic suspension bearing 5 is omitted. Therefore, the overall axial size of the magnetic levitation motor can be greatly reduced, and the overall size of the motor can be reduced without changing the output torque of the motor, so that the motor can meet the use requirements in complex environments. In addition, since the axial length of the main shaft 3 is greatly reduced, the cost of the motor can be greatly reduced.

In this application, the radial magnetic suspension bearing 5 includes a radial iron core and radial windings. The radial iron core is mounted on the mounting frame 4 . The two axial end faces of the radial iron core are connected to the two axial The end faces are flush, the radial windings are wound on the radial iron core in the axial direction, and the radial windings are evenly distributed in the circumferential direction of the radial iron core, so that a uniform radial force can be formed in the circumferential direction of the rotor assembly 1. This makes it more convenient for the rotor assembly 1 to form radial balance, and improves the stability of the magnetic suspension motor during operation. A current is passed through the radial winding to provide electromagnetic force for the radial magnetic suspension bearing 5, and a radial bearing electromagnetic circuit is formed between the radial iron core, the radial air gap and the rotor assembly 1, so that the rotor assembly 1 is suspended in the radial direction. .

The radial core is composed of silicon steel sheet laminations with strong magnetic conductivity. The lamination method is beneficial to reduce eddy current loss and improve efficiency; there are slots in the laminations, and radial windings wound with enameled wires are used in the slots to provide electromagnetic fields. , forming a radial bearing stator.

In the present application, the two axial end faces of the radial iron core are flush with the two axial end faces of the rotor assembly 1 , so it can be ensured that the magnetic field formed by the radial windings forms a radial direction in the entire axial direction of the rotor assembly 1 . The acting force is more conducive to realizing the radial balance of the rotor assembly 1. At the same time, the radial magnetic suspension bearing 5 of the present application is arranged at the center of the inner circle of the rotor assembly 1, and a single radial magnetic suspension bearing 5 can be used to realize the radial direction of the rotor assembly 1. The suspension can effectively reduce the axial size of the whole machine, improve the assembly accuracy, and save the cost of a radial magnetic suspension bearing 5 at the same time.

In other embodiments, at least two radial magnetic suspension bearings 5 can also be arranged in the inner hole of the rotor assembly 1 at intervals along the axial direction, and also do not occupy additional axial length, so it can also provide the rotor assembly 1 with At the same time of radial suspension force, the axial dimension of the whole machine is reduced.

The radial magnetic suspension bearing 5 is integrally fixed in the housing through the mounting frame 4, which provides basic support for the whole machine structure.

The stator iron core of the stator assembly 2 is formed by stacking electrical silicon chips, and is installed and fixed on the front casing. The motor windings are wound in the stator iron core to provide rotational driving force for the rotor assembly 1; The gap and rotor assembly 1 form the electromagnetic circuit of the motor, which makes the rotor perform rotational movement in the circumferential direction.

The mounting frame 4 is provided with a first stop protrusion 6 , and the first stop protrusion 6 is used to define the axial installation position of the radial magnetic suspension bearing 5 on the mounting frame 4 . The first stop protrusion 6 is an annular protrusion, which can effectively axially position the radial magnetic suspension bearing 5 on the mounting frame 4 and ensure the installation accuracy and installation efficiency of the radial magnetic suspension bearing 5 .

The mounting frame 4 includes a mounting shaft, the mounting shaft is penetrated on the inner peripheral side of the radial magnetic suspension bearing 5, and one end of the mounting shaft is fixedly arranged on the housing. In the present application, the mounting frame 4 adopts the structure of the mounting shaft, which can facilitate the processing of the mounting shaft, improve the processing efficiency, and also facilitate the installation of the radial magnetic suspension bearing 5 on the mounting frame 4 . Preferably, in order to ensure the stability and reliability of the mounting structure of the mounting bracket 4 on the housing, the mounting shaft may include an anti-rotation section and a cylindrical section, wherein the anti-rotation section has anti-rotation cut edges, or a polygonal structure, and the cylindrical section It is integral with the anti-rotation section and is located on the inner peripheral side of the rotor assembly 1. The anti-rotation section is fixedly installed on the casing, and the radial magnetic suspension bearing 5 is installed on the cylindrical section.

The housing is provided with a convex block 7 that protrudes axially in the direction away from the radial magnetic suspension bearing 5 . By arranging the projections 7 on the housing and setting the mounting grooves 8 extending in the axial direction in the projections 7, the axial fitting length between the installation shaft and the housing can be increased, and the support strength of the housing to the installation shaft can be improved , thereby ensuring the support strength and structural stability of the installation shaft for the radial magnetic suspension bearing 5 .

In this embodiment, a thrust plate 9 is fixedly arranged at one end of the main shaft 3 close to the rotor assembly 1 , and an axial connecting member 10 extending toward the rotor assembly 1 is fixedly disposed on the outer peripheral side of the thrust plate 9 away from the main shaft 3 . The end of the member 10 is provided with an end face connecting member 11 , and the end face connecting member 11 is fixedly connected to the end face of the rotor assembly 1 . As a part of connecting the main shaft 3 and the rotor assembly 1, the thrust plate 9 can realize the fixed connection between the main shaft 3 and the rotor assembly 1, and can also be used as the object of the axial bearing to realize the adjustment of the axial position of the main shaft 3 Therefore, the axial size of the magnetic levitation motor can be further shortened, which is beneficial to the flattening of the magnetic levitation motor, saves copper wires, and provides better heat dissipation.

The end face connecting member 11 is an annular disk-shaped structure whose shape matches the shape of the end face of the rotor assembly 1 , and the end face connecting member 11 and the rotor assembly 1 are fixed by welding or screwing. The end face connector 11 is used to realize a fixed connection with the end face of the rotor assembly 1 , so as to facilitate the rotor assembly 1 to transmit torque to the main shaft 3 , and then output torque through the main shaft 3 . The end face connecting piece 11 can be an annular disk-shaped structure, which forms a good fixed connection with the end face of the rotor assembly 1, or can be a plurality of plate-shaped structures arranged at intervals along the circumferential direction, and each plate-shaped structure is located at its setting position. The rotor assembly 1 is fixedly connected, thereby realizing the fixed connection between the rotor assembly 1 and the main shaft 3 as a whole.

The axial connector 10 is a cylindrical structure or a rod-like structure. When the end-face connecting member 11 is an annular disk-shaped structure, the axial connecting member 10 can adopt a cylindrical structure; when the end-face connecting member 11 is a plate-shaped structure arranged at circumferential intervals, the axial connecting member 10 can adopt a rod-shaped structure, One rod corresponds to one board, or multiple rods correspond to one board.

The axial bearing includes a first bearing portion 12 and a second bearing portion 13. The first bearing portion 12 is fixedly arranged on the mounting frame 4, the second bearing portion 13 is fixedly arranged on the housing, and the thrust plate 9 is located on the first bearing portion. 12 and the second bearing portion 13 . Both the first bearing part 12 and the second bearing part 13 include iron cores and windings, wherein the first bearing part 12 , the axial air gap and the thrust plate 9 form a first electromagnetic circuit, which is used to apply a force to the main shaft 3 toward the first electromagnetic circuit. The axial force of the directional movement, the second bearing portion 13, the axial air gap and the thrust plate 9 form a second electromagnetic circuit, which is used to apply the axial force to the main shaft 3 to move in the second direction. The second direction is opposite. By adjusting the magnitude of the winding current of the first bearing portion 12 and the second bearing portion 13 , the magnitude of the electromagnetic force output by the first bearing portion 12 and the second bearing portion 13 can be adjusted, thereby adjusting the axial direction of the thrust plate 9 . position so that the thrust plate 9 is suspended at a preset position in the axial direction.

Preferably, the thrust plate 9 is arranged at the end face of the main shaft 3 and forms an integral structure with the main shaft 3. On the one hand, it can reduce the molding process and reduce the difficulty of forming, and on the other hand, it can more effectively ensure that the thrust plate 9 and the main shaft 3 are connected to each other. The structural strength of the connection between the main shafts 3 improves the structural consistency of the main shaft 3 and the thrust plate 9 .

The casing includes 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 installed on the front on the casing 14. By dividing the casing into the front casing 14 and the rear casing 15 , the casing can be formed into a split structure, which can not only reduce the processing difficulty of the casing, but also facilitate the installation and fixing of various components inside the casing.

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

A first step is formed between the first end wall 16 and the second end wall 17 , the first end wall 16 is fitted with the end wall of the stator assembly 2 , and a first step is formed between the second end wall 17 and the end wall of the stator assembly 2 . Stepped slots, the stator assembly 2 includes stator windings, and the stator windings are arranged in the first stepped slots. The first end wall 16 is in close contact with the end wall of the stator assembly 2 , which can ensure a tighter cooperation between the front casing 14 and the stator assembly 2 , and ensure the stability and reliability of the installation structure of the stator assembly 2 on the front casing 14 . Arranging the stator winding in the first stepped slot can not only ensure the tight fit between the stator assembly 2 and the casing, but also make full use of the structure of the stator assembly 2 to reasonably design the structure of the casing, so that the structure of the casing can be fully It is convenient to install and set the stator winding.

A second stepped groove is formed between the second end wall 17 and the third end wall 18. When the magnetic levitation motor includes the thrust plate 9 and the axial connecting member 10, the thrust plate 9 and the axial connecting member 10 are arranged in the second stepped groove. The axially inner side of the axial connecting piece 10 is located on the radially 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 the thickness of the stator winding by a considerable distance, if the second end wall 17 is radially extended to the position of the axial connector 10, the second end wall 17 and the axial connector 10 interfere, and at this time, a third end wall 18 is formed on the housing which is farther axially away from the second end wall 17, so that the third end wall 18 can be connected to the rotor assembly 1 A sufficient axial distance is formed between them to meet the installation requirements of the axial connector 10 and the thrust plate 9, and at the same time, the volume of the housing will not be increased, which is convenient to realize 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 includes the second bearing part 13 , the radial outer wall of the second bearing part 13 is connected to the third end wall 18 and the fourth end wall 19 . The radial inner wall of the axial connecting section between them is in contact with each other, and the axial outer wall of the second bearing portion 13 is in contact with the axial inner wall of the fourth end wall 19 . Since the second bearing portion 13 is located at the axial outer side of the thrust plate 9 , when the axial distance between the third end wall 18 and the thrust plate 9 is appropriate, the distance between the second bearing portion 13 and the third end wall 18 is appropriate. The distance between the third end wall 18 and the thrust plate 9 will be too small, resulting in insufficient installation space to install the second bearing part 13 between the third end wall 18 and the thrust plate 9 . There is a fourth end wall 19, so that there is enough space between the fourth end wall 19 and the thrust plate 9 to install the second bearing part 13, and at the same time, the axial connecting section to which the fourth end wall 19 is connected can also be used. The installation steps are formed, 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 portion 12 , a second stop protrusion 20 is further provided on the end of the mounting bracket 4 close to the thrust plate 9 . The installation on 4 forms an axial positioning, which facilitates the fixed installation of the first bearing portion 12 on the installation frame 4 .

In the present application, the front casing 14 adopts a continuous stepped structure as the end cover structure, and the stepped grooves formed by the continuous stepped structure can be used to form an incremental axial installation space, so that the end cover can meet the requirements of different internal structures. Therefore, the internal space of the shell can be effectively used without increasing the volume of the shell, and the installation of each internal structure can be realized. The structure layout is more reasonable, which is more conducive to the miniaturization of the shell and makes the structure of the shell more compact. , to better meet the use requirements of narrow space, but also can effectively ensure the output torque.

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

It can be easily understood by those skilled in the art that, on the premise of no conflict, the above advantageous manners can be freely combined and superimposed.

The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application. Inside. The above are only the preferred embodiments of the present application. It should be pointed out that for those skilled in the art, without departing from the technical principles of the present application, several improvements and modifications can also be made, and these improvements and modifications should also be It is regarded as the protection scope of this application.

Claims (16)

1. A magnetic levitation motor, characterized in that it comprises a housing, a rotor assembly (1), a stator assembly (2), a main shaft (3), a mounting frame (4), a radial magnetic levitation bearing (5) and an axial bearing, The mounting frame (4) is fixedly arranged on the housing, the radial magnetic suspension bearing (5) is fixedly mounted on the mounting frame (4), and the rotor assembly (1) is sleeved on the radial toward the outer circumference of the magnetic suspension bearing (5), the stator assembly (2) is sleeved on the outer circumference of the rotor assembly (1), the main shaft (3) is arranged on the axial outer side of the rotor assembly (1), and is connected with the rotor assembly (1). The rotor assembly (1) is fixedly connected, the axial bearing is used to adjust the axial position of the main shaft (3), and the radial magnetic suspension bearing (5) is used to adjust the radial direction of the rotor assembly (1). Location. 2. The magnetic levitation motor according to claim 1, wherein the radial magnetic levitation bearing (5) comprises a radial iron core and a radial winding, and the radial iron core is mounted on the mounting frame (4) above, the two axial end faces of the radial iron core are flush with the two axial end faces of the rotor assembly (1), and the radial winding is wound on the radial iron core in the axial direction, The radial windings are uniformly distributed along the circumference of the radial core. 3. The magnetic levitation motor according to claim 1, wherein a first stop protrusion (6) is provided on the mounting bracket (4), and the first stop protrusion (6) is used to limit the The axial installation position of the radial magnetic suspension bearing (5) on the installation frame (4). 4 . The magnetic levitation motor according to claim 1 , wherein the mounting frame ( 4 ) comprises a mounting shaft, and the mounting shaft passes through the inner peripheral side of the radial magnetic levitation bearing ( 5 ), and the One end of the installation shaft is fixedly arranged on the housing. 5 . The magnetic levitation motor according to claim 4 , wherein the housing is provided with a convex block ( 7 ) that protrudes axially in a direction away from the radial magnetic levitation bearing ( 5 ). 5 . The back side of the block (7) is provided with an installation groove (8), and the installation shaft is installed in the installation groove (8). 6. The magnetic levitation motor according to any one of claims 1 to 5, characterized in that, a thrust plate (9) is fixedly provided at one end of the main shaft (3) close to the rotor assembly (1), and the An axial connecting piece (10) extending toward the rotor assembly (1) is fixedly provided on the outer peripheral side of the thrust plate (9) away from the main shaft (3), and the end of the axial connecting piece (10) is provided with a An end face connecting piece (11) is fixedly connected to the end face of the rotor assembly (1). 7 . The magnetic levitation motor according to claim 6 , wherein the end face connecting member ( 11 ) is an annular disk-shaped structure whose shape is adapted to the shape of the end face of the rotor assembly ( 1 ), and the end face connection The parts (11) and the rotor assembly (1) are fixed by welding or screwing. 8 . The magnetic levitation motor according to claim 7 , wherein the axial connecting member ( 10 ) is a cylindrical structure or a rod-shaped structure. 9 . 9 . The magnetic levitation motor according to claim 6 , wherein the axial bearing comprises a first bearing part ( 12 ) and a second bearing part ( 13 ), and the first bearing part ( 12 ) is fixedly arranged on the On the mounting frame (4), the second bearing portion (13) is fixedly arranged on the housing, and the thrust plate (9) is located between the first bearing portion (12) and the second bearing portion (12) between the bearing parts (13). 10 . The magnetic levitation motor according to claim 6 , wherein the thrust plate ( 9 ) is disposed at the position of the end face of the main shaft ( 3 ), and forms an integral structure with the main shaft ( 3 ). 11 . 11. The magnetic levitation motor according to any one of claims 1 to 5 or 7 to 10, wherein the casing comprises a front casing (14) and a rear casing (15), the front casing (14) and the rear casing (15) are of separate structures and are fixedly connected together, the mounting bracket (4) is arranged on the rear casing (15), and the stator assembly (2) is installed on the front casing (14). 12 . The magnetic levitation motor according to claim 11 , wherein the front casing ( 14 ) comprises a stepped end extending from an outer peripheral side to an inner peripheral side along an axial direction away from the rotor core. 13 . A cover, 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) arranged in sequence along an axial direction away from the rotor core ), and the adjacent end walls are fixedly connected by axial connecting sections. 13. The magnetic levitation motor according to claim 12, wherein a first step is formed between the first end wall (16) and the second end wall (17), and the first end wall (16) ) is attached to the end wall of the stator assembly (2), a first stepped groove is formed between the second end wall (17) and the end wall of the stator assembly (2), and the stator assembly (2) A stator winding is included, and the stator winding is arranged in the first stepped slot. 14. The magnetic levitation motor according to claim 12, wherein a second stepped groove is formed between the second end wall (17) and the third end wall (18), and the magnetic levitation motor comprises a thrust When the disc (9) and the axial connecting piece (10) are used, the thrust disc (9) and the axial connecting piece (10) are arranged on the axial inner side of the second stepped groove, and the axial connecting piece (10) is A piece (10) is located radially inward of the axial connecting section between the second end wall (17) and the third end wall (18). 15. The magnetic levitation motor according to claim 12, wherein a third stepped groove is formed between the third end wall (18) and the fourth end wall (19), and the magnetic levitation motor comprises a second When the bearing part (13) is used, the radial direction of the axial connection section between the radial outer wall of the second bearing part (13) and the third end wall (18) and the fourth end wall (19) The inner wall is fitted, and the axial outer wall of the second bearing portion (13) is fitted with the axial inner wall of the fourth end wall (19). 16 . An air conditioner comprising a magnetic levitation motor, wherein the magnetic levitation motor is the magnetic levitation motor according to any one of claims 1 to 15 .

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