CN213575192U

CN213575192U - Radial hybrid magnetic suspension bearing assembly and compressor with same

Info

Publication number: CN213575192U
Application number: CN202022438065.8U
Authority: CN
Inventors: 张芳; 龚高; 张超; 李欣; 吴瑞; 董如昊
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2020-10-27
Filing date: 2020-10-27
Publication date: 2021-06-29
Anticipated expiration: 2030-10-27

Abstract

The utility model provides a radial hybrid magnetic suspension bearing assembly and have its compressor. And the outer stator core is internally provided with a permanent magnet, a first radial vertical stator component, a first radial horizontal stator component and a rotor component. Through set up the permanent magnet in outer stator core, and set up first radial vertical stator module, the horizontal stator module of first radial in outer stator core's both ends respectively. The radial hybrid magnetic suspension bearing assembly is compact in interior, the axial length of the radial hybrid magnetic suspension bearing assembly is reduced, and the stability and reliability of the radial hybrid magnetic suspension bearing assembly are effectively improved.

Description

Radial hybrid magnetic suspension bearing assembly and compressor with same

Technical Field

The utility model relates to a magnetic suspension bearing technical field particularly, relates to a radial hybrid magnetic suspension bearing assembly and have its compressor.

Background

The magnetic suspension bearing has a series of excellent qualities of no contact, no abrasion, high rotating speed, high precision, no need of lubrication and sealing and the like, and is a high and new technical product integrating electromagnetism, electronic technology, control engineering, signal processing and mechanics.

The magnetic bearing is divided into three types of active type, passive type and hybrid type, the active type magnetic bearing has high rigidity and can be precisely controlled, but the volume and the power consumption required by generating unit bearing capacity are larger. The passive magnetic bearing realizes the suspension of the rotor by utilizing the attractive force or the repulsive force between magnetic materials, and has lower rigidity and damping. The hybrid magnetic bearing uses the permanent magnet to provide a bias magnetic field to replace a static bias magnetic field generated by an electromagnet in an active magnetic bearing, reduces the ampere-turns of a control winding, reduces the volume of the bearing, improves the bearing capacity of the bearing and the like. The hybrid magnetic bearing has irreplaceable advantages in the field with strict requirements on volume and power consumption, and is mainly applied to high-speed and ultra-high-speed occasions. Therefore, the integration and miniaturization of the magnetic levitation system and the improvement of the stability and reliability of the control system will be the key research directions.

In order to realize contactless support of the rotor, the magnetic suspension bearing system needs to control five degrees of freedom of the space of the rotor. The traditional magnetic suspension structure adopts a permanent magnet biased front radial bearing and a permanent magnet biased rear radial bearing to control the radial four-degree-of-freedom suspension control of a rotating shaft, the permanent magnet biased axial bearing controls the axial degree-of-freedom suspension control of the rotating shaft, two groups of permanent magnet biased radial electromagnetic bearings and one group of permanent magnet biased axial bearing realize the five-degree-of-freedom suspension of a rotor space, a bias magnetic field is generated through a permanent magnet, a closed loop is formed through an auxiliary stator magnetic pole, the rotating shaft and a radial stator magnetic pole to form a permanent magnet bias magnetic field, bias magnetic fluxes are formed in a radial stator magnetic pole and a main air gap of the rotating shaft, control currents are introduced into radial horizontal and vertical control windings to generate a control magnetic field, the control magnetic field is formed through the inside of a stator iron core and the rotating shaft. The permanent magnet generates a bias magnetic field, a closed loop is formed by the stator cores at the left end and the right end and the thrust disc to form the bias magnetic field, bias magnetic fluxes are formed in air gaps between the left stator core and the thrust disc and between the left stator core and the thrust disc, the control winding is connected with control current to form a control magnetic field, the closed loop is formed by the stator cores and the thrust disc to form a control magnetic circuit, and the bias magnetic fluxes in the stator cores at the left end and the right end and the thrust disc are adjusted to realize the axial suspension control of the rotating shaft. Each group of radial magnetic suspension bearings controls two radial degrees of freedom of the rotor, and the axial magnetic suspension bearings control the axial translational degree of freedom of the rotor. The magnetic suspension system structure has two disadvantages:

the two radial bearings and the axial bearing are arranged side by side, so that the axial length of the rotor is increased, the axial volume of the suspension system is increased, and the flexibility of the rotor is enhanced. When the radial magnetic suspension bearing simultaneously controls the radial horizontal and vertical directions, the radial two-degree-of-freedom control magnetic fields are mutually coupled, the control logic is complex, the radial two-degree-of-freedom control winding is single, when a single winding breaks down, the control corresponding to the radial degree of freedom is invalid, a rotating shaft rotating at a high speed causes serious safety hazard, and the stability and the reliability of a suspension system are low.

SUMMERY OF THE UTILITY MODEL

The main object of the utility model is to provide a radial hybrid magnetic suspension bearing assembly and have its compressor to solve the big problem of magnetic suspension bearing assembly axial length among the prior art.

To achieve the above object, according to one aspect of the present invention, there is provided a radial hybrid magnetic levitation bearing assembly comprising: the permanent magnet is arranged in the outer stator core; a first radial vertical stator assembly disposed within the second end of the outer stator core and located on a first side of the permanent magnet; a first radial horizontal stator assembly disposed within a first end of the outer stator core and located on a second side of the permanent magnet opposite the first side, the first radial vertical stator assembly disposed opposite the first radial horizontal stator assembly; the rotor assembly is arranged in the outer stator iron core and comprises a rotating shaft; the first radial vertical stator assembly is used for generating an independent radial vertical control magnetic field, the first radial horizontal stator assembly is used for generating an independent radial horizontal control magnetic field, and the permanent magnet generates a bias magnetic field.

Further, the first radial vertical stator assembly comprises: the first radial vertical stator is of an annular structure, the first radial vertical stator is arranged in the second end of the outer stator core and is positioned on the first side of the permanent magnet, and first stator teeth are arranged on the inner circle of the first radial vertical stator; and the radial vertical winding is wound on the first stator teeth.

Further, the number of the first stator teeth is two, radial vertical windings are arranged on each first stator tooth, and the two first stator teeth are arranged oppositely.

Further, the first radial horizontal stator assembly comprises: the first radial horizontal stator is of an annular structure, is arranged in the first end of the outer stator core and is arranged opposite to the first radial vertical stator, is coaxially arranged with the first radial vertical stator, and is provided with third stator teeth on the inner circle; and the first radial horizontal winding is wound on the third stator tooth.

Furthermore, the number of the third stator teeth is two, each third stator tooth is provided with a first radial horizontal winding, and the two third stator teeth are oppositely arranged.

Further, be provided with first annular arch on the inner peripheral surface of the first end of outer stator core to the second end of outer stator core, the permanent magnet is the loop configuration, and the excircle of permanent magnet sets up with first annular arch's interior circle is laminated mutually.

Furthermore, a first installation step surface and a second installation step surface are respectively arranged on two sides of the first annular bulge, the first radial horizontal stator is installed on the first installation step surface, the first radial vertical stator is installed on the second installation step surface, a part of the first radial horizontal stator and the surface of the first annular bulge are arranged at a distance, and a part of the first radial vertical stator and the surface of the first annular bulge are arranged at a distance.

Further, the number of the first stator teeth is multiple, the radial vertical windings on each first stator tooth independently generate a control magnetic field, and when one of the radial vertical windings fails, the access current of at least one of the remaining radial vertical windings can be increased to generate a magnetic field with a preset intensity.

Further, the number of the third stator teeth is multiple, the first radial horizontal windings on each third stator tooth independently generate a control magnetic field, and when one of the first radial horizontal windings fails, the access current of the remaining at least one first radial horizontal winding can be increased to generate a magnetic field with a preset intensity.

Further, the plurality of first stator teeth are symmetrically arranged along the radial direction of the first radial vertical stator, the plurality of third stator teeth are symmetrically arranged along the radial direction of the first radial horizontal stator, and a geometric center line of the oppositely arranged first stator teeth in the plurality of first stator teeth along the radial direction of the first radial vertical stator is perpendicular to a geometric center line of the oppositely arranged third stator teeth in the plurality of third stator teeth along the radial direction of the first radial horizontal stator.

According to another aspect of the present invention, there is provided a compressor comprising a radial hybrid magnetic levitation bearing assembly, the radial hybrid magnetic levitation bearing assembly being the above-mentioned radial hybrid magnetic levitation bearing assembly.

Use the technical scheme of the utility model, through set up the permanent magnet in outer stator core, and set up first radial vertical stator module, first radial horizontal stator module in outer stator core's both ends respectively. The radial hybrid magnetic suspension bearing assembly is compact in interior, the axial length of the radial hybrid magnetic suspension bearing assembly is reduced, and the stability and reliability of the radial hybrid magnetic suspension bearing assembly are effectively improved.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

figure 1 shows a schematic structural view of a first embodiment of a radial hybrid magnetic levitation bearing assembly according to the present invention;

figure 2 shows a schematic view of the radial vertical control magnetic field of the radial hybrid magnetic levitation bearing assembly according to the present invention;

figure 3 shows a schematic structural view of a second embodiment of a radial hybrid magnetic levitation bearing assembly according to the present invention;

figure 4 shows a schematic view of the radial horizontal control magnetic field of the radial hybrid magnetic levitation bearing assembly according to the present invention;

figure 5 shows a schematic structural view of a third embodiment of a radial hybrid magnetic levitation bearing assembly according to the present invention;

figure 6 shows an exploded structural schematic of an embodiment of a radial hybrid magnetic levitation bearing assembly according to the present invention;

figure 7 shows a schematic structural view of an embodiment of a rotor assembly of a radial hybrid magnetic levitation bearing assembly according to the present invention;

FIG. 8 shows a cross-sectional structural schematic of an embodiment of a radial hybrid magnetic levitation bearing assembly in accordance with the present invention;

figure 9 shows a schematic structural view of an embodiment of a rotating shaft of a radial hybrid magnetic levitation bearing assembly according to the present invention;

figure 10 shows a force analysis diagram of a rotating shaft of a radial hybrid magnetic levitation bearing assembly according to the present invention in a first state;

figure 11 shows a force analysis diagram of a rotating shaft of a radial hybrid magnetic levitation bearing assembly according to the present invention in a second state;

figure 12 shows a force analysis diagram of a rotating shaft of a radial hybrid magnetic levitation bearing assembly according to the present invention in a third state;

figure 13 shows a force analysis diagram of a fourth state of the shaft of the radial hybrid magnetic levitation bearing assembly according to the present invention;

figure 14 shows a schematic structural view of a fourth embodiment of a radial hybrid magnetic levitation bearing assembly according to the present invention;

FIG. 15 is a schematic cross-sectional view taken along line A-A of FIG. 14;

figure 16 shows a schematic structural view of a fifth embodiment of a radial hybrid magnetic levitation bearing assembly according to the present invention;

figure 17 shows a schematic structural view of a sixth embodiment of a radial hybrid magnetic levitation bearing assembly according to the present invention;

figure 18 shows a schematic structural view of a seventh embodiment of a radial hybrid magnetic levitation bearing assembly according to the present invention;

figure 19 shows a schematic view of a radial vertical control magnetic field in a seventh embodiment of a radial hybrid magnetic levitation bearing assembly according to the present invention;

figure 20 shows a schematic structural view of an eighth embodiment of a radial hybrid magnetic levitation bearing assembly according to the present invention;

figure 21 shows a schematic view of a radial horizontal control magnetic field in an eighth embodiment of a radial hybrid magnetic levitation bearing assembly according to the present invention.

Wherein the figures include the following reference numerals:

10. an outer stator core;

11. a permanent magnet; 12. an annular boss; 13. a first annular step; 14. a second annular step; 15. a first annular projection;

151. a first mounting step surface; 152. a second mounting step surface; 16. a second annular projection;

20. a first radial vertical stator assembly;

21. a first radial vertical stator; 211. a first stator tooth;

22. radial vertical windings; 23. a first magnetism isolating ring;

30. a second radial vertical stator assembly;

31. a second radial vertical stator; 311. a second stator tooth;

32. a second radial vertical winding; 33. a second magnetism isolating ring;

40. a rotor assembly;

41. a rotating shaft; 42. a radial vertical rotor; 43. a first radial horizontal rotor; 44. a second radial horizontal rotor;

50. a first radial horizontal stator assembly;

51. a first radial horizontal stator; 511. a third stator tooth; 52. a first radial horizontal winding;

60. a second radial horizontal stator assembly;

61. a second radial horizontal stator; 611. a fourth stator tooth; 62. a second radial horizontal winding;

70. precision screw caps;

80. a first magnetically conductive ring;

90. and a second magnetic conductive ring.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Exemplary embodiments according to the present application will now be described in more detail with reference to the accompanying drawings. These exemplary embodiments may, however, be embodied in many different forms and should not be construed as limited to only the embodiments set forth herein. It is to be understood that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art, in the drawings, it is possible to enlarge the thicknesses of layers and regions for clarity, and the same devices are denoted by the same reference numerals, and thus the description thereof will be omitted.

Referring to fig. 1-21, according to an embodiment of the present application, a radial hybrid magnetic levitation bearing assembly is provided.

Specifically, as shown in fig. 18-21, the radial hybrid magnetic levitation bearing assembly includes an outer stator core 10, a first radial vertical stator assembly 20, and a first radial horizontal stator assembly 50. Permanent magnets 11 are provided in the outer stator core 10. A first radial vertical stator assembly 20 is disposed within the second end of the outer stator core 10 and on a first side of the permanent magnets 11. A first radial horizontal stator assembly 50 is disposed within a first end of the outer stator core 10 and on a second side of the permanent magnets 11 opposite the first side, and a first radial vertical stator assembly 20 is disposed opposite the first radial horizontal stator assembly 50. A rotor assembly 40, the rotor assembly 40 being disposed in the outer stator core 10, the rotor assembly 40 including a rotating shaft 41; wherein the first radial vertical stator assembly 20 is configured to generate an independent radial vertical control magnetic field, the first radial horizontal stator assembly 50 is configured to generate an independent radial horizontal control magnetic field, and the permanent magnet 11 generates a bias magnetic field.

In this embodiment, a permanent magnet is disposed in the outer stator core, and a first radial vertical stator assembly and a first radial horizontal stator assembly are disposed in both ends of the outer stator core, respectively. The radial hybrid magnetic suspension bearing assembly is compact in interior, the axial length of the radial hybrid magnetic suspension bearing assembly is reduced, and the stability and reliability of the radial hybrid magnetic suspension bearing assembly are effectively improved.

Therein, the first radial vertical stator assembly 20 includes a first radial vertical stator 21 and radial vertical windings 22. The first radial vertical stator 21 is of annular configuration. The first radial vertical stator 21 is disposed in the second end of the outer stator core 10 and located on the first side of the permanent magnet 11, and the inner circle of the first radial vertical stator 21 is provided with first stator teeth 211. The radial vertical winding 22 is wound on the first stator tooth 211.

The first radial horizontal stator assembly 50 includes a first radial horizontal stator 51 and first radial horizontal windings 52. The first radial horizontal stator 51 is an annular structure, and the first radial horizontal stator 51 is disposed in the first end of the outer stator core 10 and is disposed opposite to the first radial vertical stator 21. The first radial horizontal stator 51 is disposed coaxially with the first radial vertical stator 21, and the inner circle of the first radial horizontal stator 51 is provided with third stator teeth 511. The first radial horizontal winding 52 is wound around the third stator tooth 511.

As shown in fig. 20, a first annular protrusion 15 is disposed on an inner circumferential surface from the first end of the outer stator core 10 to the second end of the outer stator core 10, the permanent magnet 11 is in an annular structure, and an outer circle of the permanent magnet 11 is attached to an inner circle of the first annular protrusion 15. A first mounting step surface 151 and a second mounting step surface 152 are respectively provided on both sides of the first annular protrusion 15, the first radial horizontal stator 51 is mounted on the first mounting step surface 151, the first radial vertical stator 21 is mounted on the second mounting step surface 152, a portion of the first radial horizontal stator 51 is disposed with a distance from a surface of the first annular protrusion 15, and a portion of the first radial vertical stator 21 is disposed with a distance from a surface of the first annular protrusion 15.

In this embodiment, the number of the first stator teeth 211 is multiple, the radial vertical windings 22 on each first stator tooth 211 independently generate the control magnetic field, and when one of the radial vertical windings 22 fails, the current applied to at least one of the remaining radial vertical windings 22 may be increased to generate a magnetic field of a predetermined strength. The number of the third stator teeth 511 is plural, the first radial horizontal winding 52 on each third stator tooth 511 independently generates a control magnetic field, and when one of the first radial horizontal windings 52 fails, the current applied to at least one of the remaining first radial horizontal windings 52 may be increased to generate a magnetic field of a predetermined strength. This arrangement can improve the utility of the radial hybrid magnetic levitation bearing assembly.

The plurality of first stator teeth 211 are symmetrically arranged along the radial direction of the first radial vertical stator 21, the plurality of third stator teeth 511 are symmetrically arranged along the radial direction of the first radial horizontal stator 51, and a geometric center line of the oppositely arranged first stator teeth 211 of the plurality of first stator teeth 211 along the radial direction of the first radial vertical stator 21 is perpendicular to a geometric center line of the oppositely arranged third stator teeth 511 of the plurality of third stator teeth 511 along the radial direction of the first radial horizontal stator 51. Preferably, the first stator teeth 211 may be provided in two, each of the first stator teeth 211 is provided with the radial vertical winding 22, and the two first stator teeth 211 are oppositely arranged. The third stator teeth 511 may be provided in two, each third stator tooth 511 is provided with the first radial horizontal winding 52, and the two third stator teeth 511 are oppositely provided.

The radial hybrid magnetic levitation bearing assembly includes an outer stator core 10, a first radial vertical stator assembly 20, a first radial horizontal stator assembly 50, and a magnetic shield. A permanent magnet 11 is arranged in a first end of the outer stator core 10. a first radial vertical stator assembly 20 is arranged in a second end of the outer stator core 10; a first radial horizontal stator assembly 50 is disposed within the outer stator core 10 between the permanent magnets 11 and the first radial vertical stator assembly 20. The magnetism isolating part is arranged between the first radial horizontal stator assembly 50 and the outer stator core 10; a rotor assembly 40, the rotor assembly 40 being disposed in the outer stator core 10, the rotor assembly 40 including a rotating shaft 41; wherein the first radial vertical stator assembly 20 is configured to generate an independent radial vertical control magnetic field, the first radial horizontal stator assembly 50 is configured to generate an independent radial horizontal control magnetic field, and the permanent magnet 11 generates a bias magnetic field. Wherein, the magnetism isolating part can be a magnetism isolating ring 53.

In the embodiment, the permanent magnet, the first radial vertical stator assembly, the first radial horizontal stator assembly, the magnetism isolating part and the rotor assembly are arranged in the outer stator core, and the first radial vertical stator assembly and the first radial horizontal stator assembly are arranged in a mode of generating independent control magnetic fields, so that the arrangement can avoid the coupling inside the radial hybrid magnetic suspension bearing assembly, the radial hybrid magnetic suspension bearing assembly adopting the structure is compact inside, the axial height of the radial hybrid magnetic suspension bearing assembly is reduced, and the stability and the reliability of the radial hybrid magnetic suspension bearing assembly are effectively improved. As shown in fig. 18, fig. 11a is a schematic diagram of the bias magnetic field generated by the permanent magnet 11 at the second end of the outer stator core 10, fig. 19 20a is a schematic diagram of the radial vertical control magnetic field generated by the first radial vertical stator assembly 20, fig. 20 b is a schematic diagram of the bias magnetic field generated by the permanent magnet 11 at the first end of the outer stator core 10, and fig. 21 a is a schematic diagram of the radial horizontal control magnetic field generated by the first radial horizontal stator assembly 50.

According to another embodiment of the present application, the radial hybrid magnetic levitation bearing assembly includes an outer stator core 10, a first radial vertical stator assembly 20, a second radial vertical stator assembly 30, and a rotor assembly 40. Permanent magnets 11 are provided in the outer stator core 10. A first radial vertical stator assembly 20 is disposed within the outer stator core 10 and on a first side of the permanent magnet 11; the second radial vertical stator assembly 30 is arranged in the outer stator core 10 and located on the second side of the permanent magnet 11, and the first radial vertical stator assembly 20 is arranged opposite to the second radial vertical stator assembly 30; the rotor assembly 40 is disposed in the outer stator core 10, and the rotor assembly 40 includes a rotating shaft 41. Wherein the first radial vertical stator assembly 20 and the second radial vertical stator assembly 30 are used to generate independent control magnetic fields and the permanent magnet 11 generates a bias magnetic field.

In this embodiment, the permanent magnet 11 is disposed in the outer stator core 10, and the first radial vertical stator assembly 20 and the second radial vertical stator assembly 30 are disposed on two sides of the permanent magnet 11, respectively, and the control magnetic fields generated by the first radial vertical stator assembly 20 and the second radial vertical stator assembly 30 are independent, so that the magnetic circuits generated by the first radial vertical stator assembly 20 and the second radial vertical stator assembly 30 are complementarily coupled, which simplifies the radial degree of freedom control logic and improves the stability and reliability of the radial control of the radial hybrid magnetic levitation bearing assembly. By the arrangement, the radial and axial freedom degree multi-winding control of the rotating shaft 41 can be realized by the radial mixed type magnetic suspension bearing assembly, the magnetic suspension system is in a non-control state when a single-winding control fault occurs, and the stability and reliability of the magnetic suspension system are further improved.

As shown in fig. 1 and 6, the first radial vertical stator assembly 20 includes a first radial vertical stator 21 and radial vertical windings 22. The first radial vertical stator 21 is of an annular structure, the first radial vertical stator 21 is arranged in the outer stator core 10 and located on a first side of the permanent magnet 11, and the inner circle of the first radial vertical stator 21 is provided with first stator teeth 211. The radial vertical winding 22 is wound on the first stator tooth 211. Wherein, first stator tooth 211 is two, all is provided with radial vertical winding 22 on each first stator tooth 211, and two first stator teeth 211 set up relatively. This arrangement effectively improves the performance of the first radial vertical stator assembly 20. Of course, the number of the first stator teeth 211 may be set to other numbers as needed.

As shown in FIG. 1, the first radial vertical stator assembly 20 also includes a first flux ring 23. The first magnetism isolating ring 23 is disposed in the outer stator core 10, and the first magnetism isolating ring 23 is sleeved on the outer peripheral surface of the first radial vertical stator 21. This arrangement can prevent the occurrence of leakage flux between the first radial vertical stator 21 and the outer stator core 10 from affecting the strength of the radial bias magnetic field C1.

Further, the second radial vertical stator assembly 30 includes a second radial vertical stator 31, second radial vertical windings 32. The second radial vertical stator 31 is an annular structure, and the second radial vertical stator 31 is disposed in the outer stator core 10 and located on the second side of the permanent magnet 11. The second radial vertical stator 31 is disposed coaxially with the first radial vertical stator 21, and the inner circle of the second radial vertical stator 31 is provided with second stator teeth 311. The second radial vertical winding 32 is wound on the second stator teeth 311. The number of the second stator teeth 311 is two, each second stator tooth 311 is provided with a second radial vertical winding 32, and the two second stator teeth 311 are arranged oppositely. This arrangement effectively improves the performance of the second radial vertical stator assembly 30. The number of second stator teeth 311 is not limited to two.

To further increase the strength of the radial bias magnetic field C1, the second radial vertical stator assembly 30 also includes a second flux ring 33. The second magnetism isolating ring 33 is disposed in the outer stator core 10, and the second magnetism isolating ring 33 is sleeved on the outer peripheral surface of the second radial vertical stator 31.

As shown in fig. 3, the radial hybrid magnetic levitation bearing assembly further includes a first radial horizontal stator assembly 50, a second radial horizontal stator assembly 60. A first radial horizontal stator assembly 50 is disposed within the first end of the outer stator core 10 and outside of the first radial vertical stator assembly 20. A second radial horizontal stator assembly 60 is disposed within the second end of the outer stator core 10 and outside of the second radial vertical stator assembly 30. Wherein the first radial horizontal stator assembly 50 and the second radial horizontal stator assembly 60 are used to generate independent radial horizontal control magnetic fields, the bias magnetic field being generated by the permanent magnets 11. That is, in this embodiment, the outer stator core 10, the permanent magnet 11, the first radial vertical stator assembly 20, the second radial vertical stator assembly 30, and the rotor assembly 40 are combined, so that five-degree-of-freedom control of the rotating shaft 41 can be realized, and the stability and reliability of the rotating shaft 41 are effectively improved.

Specifically, the first radial horizontal stator assembly 50 includes a first radial horizontal stator 51, a first radial horizontal winding 52. The first radial horizontal stator 51 is an annular structure, the first radial horizontal stator 51 is disposed in the first end of the outer stator core 10 and located outside the axial direction of the first radial vertical stator assembly 20, and the inner circle of the first radial horizontal stator 51 is provided with third stator teeth 511. The first radial horizontal winding 52 is wound around the third stator tooth 511. Two third stator teeth 511 are provided, and the two third stator teeth 511 are disposed oppositely. Of course, the number of third stator teeth 511 may be set to not only two.

Preferably, the geometric centerline of the third stator tooth 511 along the first radial horizontal stator 51 is disposed perpendicular to the geometric centerline of the first stator tooth 211 along the first radial vertical stator 21. The arrangement enables the first stator teeth 211 and the third stator teeth 511 to be arranged in a staggered manner in the axial direction of the rotating shaft 41, and the arrangement enables the suspension state of the rotating shaft 41 to be corrected in time by adjusting the magnetic flux intensity of the magnetic circuit formed by the first stator teeth 211 and the third stator teeth 511, thereby further improving the stability of the rotating shaft 41 during rotation.

Second radial horizontal stator assembly 60 includes a second radial horizontal stator 61, second radial horizontal windings 62. The second radial horizontal stator 61 is an annular structure, and the second radial horizontal stator 61 is disposed in the second end of the outer stator core 10 and located outside of the axial direction of the second radial vertical stator assembly 30. The second radial horizontal stator 61 is provided with fourth stator teeth 611 on its inner circle. The second radial horizontal winding 62 is wound around the fourth stator tooth 611. Two fourth stator teeth 611 are provided, and the two fourth stator teeth 611 are disposed oppositely. In this embodiment, the fourth stator teeth 611 may be provided in other numbers.

Preferably, the geometric centerline of the fourth stator tooth 611 along the second radial horizontal stator 61 is disposed perpendicular to the geometric centerline of the second stator tooth 311 along the second radial vertical stator 31. The arrangement enables the second stator teeth 311 and the fourth stator teeth 611 to be arranged in a staggered manner in the axial direction of the rotating shaft 41, and the arrangement enables the suspension state of the rotating shaft 41 to be corrected in time by adjusting the magnetic flux intensity of the magnetic circuit formed on the second stator teeth 311 and the fourth stator teeth 611, thereby further improving the stability of the rotating shaft 41 during rotation.

As shown in fig. 7, the rotor assembly 40 includes a radial vertical rotor 42. The inner circles of the first radial vertical stator 21, the outer stator core 10 and the second radial vertical stator 31 form a radial vertical rotor 42 for installation, the radial vertical rotor 42 is arranged in a matched manner with the first radial vertical stator 21, the outer stator core 10 and the second radial vertical stator 31, and the rotating shaft 41 penetrates through the radial vertical rotor 42. The radial hybrid magnetic suspension bearing assembly can be arranged in such a way that the stability and the reliability of the radial hybrid magnetic suspension bearing assembly can be improved.

Further, the rotor assembly 40 further includes a first radial horizontal rotor 43 and a second radial horizontal rotor 44. The first radial horizontal rotor 43 is disposed in the first end of the outer stator core 10 and is located outside in the axial direction of the first radial horizontal stator 51. The first radial horizontal rotor 43 is disposed in cooperation with the first radial horizontal stator 51. The second radial horizontal rotor 44 is disposed in the second end of the outer stator core 10, and is located outside in the axial direction of the second radial horizontal stator 61. The second radial horizontal rotor 44 is disposed in cooperation with the second radial horizontal stator 61, and the rotating shaft 41 is disposed through the first radial horizontal rotor 43 and the second radial horizontal rotor 44. Wherein the end of the rotating shaft 41 is locked by a precision nut.

The diameter of the cross section of at least one of the first radial horizontal rotor 43 and the second radial horizontal rotor 44 is gradually increased outward in the direction of the rotation shaft 41. As shown in fig. 7, the first radial horizontal rotor 43 and the second radial horizontal rotor 44 are both of a frustum structure, and the arrangement is such that an air gap structure having an inclination angle with the axial direction of the rotating shaft is formed between the first radial horizontal rotor 43 and the second radial horizontal rotor 44 and between the first radial horizontal stator 51 and the second radial horizontal stator 61, so that the arrangement can control the axial direction of the rotating shaft 41 by controlling the magnitude of the current passed through the first radial horizontal winding 52 and the second radial horizontal winding 62, and effectively improves the practicability of the magnetic suspension bearing.

In another embodiment of the present application, as shown in fig. 5, the first radial horizontal rotor 43 and the second radial horizontal rotor 44 are in an equal-diameter structure, and an air gap structure with equal distance in the axial direction is formed between the first radial horizontal rotor 43 and the second radial horizontal rotor 44 and the first radial horizontal stator 51 and the second radial horizontal stator 61.

Preferably, the first radial horizontal stator 51 and the second radial horizontal stator 61 are integrally formed with the outer stator core 10. This arrangement can further improve the stability of the radial hybrid magnetic levitation bearing assembly.

Further, the middle of the outer stator core 10 is provided with an annular boss 12. The outer peripheral surface of the permanent magnet 11 is attached to the inner circle of the annular boss 12, one side of the outer surface of the permanent magnet 11 facing the outer stator core 10 is an N pole, and one side of the permanent magnet 11 facing the rotating shaft 41 is an S pole. The arrangement is such that the permanent magnets 11 cooperate with the first radial horizontal winding 52 and the second radial horizontal winding 62 to form a radial horizontal bias magnetic field C5 for controlling the rotating shaft 41.

Wherein the height of the annular boss 12 in the axial direction is the same as the height of the permanent magnet 11 in the axial direction. This arrangement can improve the mounting stability of the permanent magnet 11.

As shown in fig. 6 and 8, the first end of the outer stator core 10 is provided with a first annular step 13 therein. A mounting space for accommodating the first radial horizontal stator assembly 50 is formed between the step surface of the first annular step 13 to the end of the outer stator core 10. The step face of the first annular step 13 to one side of the annular boss 12 forms a mounting space for receiving the first radial vertical stator assembly 20. A second annular step 14 is provided in the second end of the outer stator core 10. A mounting space for accommodating the second radial horizontal stator assembly 60 is formed between the step surface of the second annular step 14 to the end of the outer stator core 10. The step face of the second annular step 14 to one side of the annular boss 12 forms a mounting space for receiving a second radial vertical stator assembly 30. The radial hybrid magnetic suspension bearing assembly is compact in structure and the axial height of the radial hybrid magnetic suspension bearing assembly can be effectively shortened.

Further, the first radial vertical stator 21 has a plurality of first stator teeth 211. Each first stator tooth 211 is provided with a radial vertical winding 22, and each radial vertical winding 22 is independently controlled so that each radial vertical winding 22 generates an independent control magnetic field. The second radial vertical stator 31 has a plurality of second stator teeth 311, each second stator tooth 311 is provided with a second radial vertical winding 32, and each second radial vertical winding 32 is independently controlled so that each second radial vertical winding 32 generates an independent control magnetic field. The first radial horizontal stator 51 has a plurality of third stator teeth 511, each of the third stator teeth 511 is provided with a first radial horizontal winding 52, and each of the first radial horizontal windings 52 is independently controlled such that each of the first radial horizontal windings 52 generates an independent control magnetic field. The second radial horizontal stator 61 has a plurality of fourth stator teeth 611, each fourth stator tooth 611 is provided with a second radial horizontal winding 62, and each second radial horizontal winding 62 is independently controlled such that each second radial horizontal winding 62 generates an independent control magnetic field. The windings on the stator teeth are independently controlled, so that when the winding on one stator tooth fails, a control magnetic field with enough strength can be generated by increasing the access current of the other stator tooth or simultaneously increasing the access current of the other stator teeth, and the effect of stably controlling the rotating shaft is also achieved.

The radial hybrid magnetic levitation bearing assembly in the above embodiments may also be used in the technical field of compressor equipment, i.e. according to another aspect of the present invention, a compressor is provided, comprising the radial hybrid magnetic levitation bearing assembly, which is the radial hybrid magnetic levitation bearing assembly in the above embodiments.

In particular, in order to solve the problems that in the five-degree-of-freedom suspension system in the prior art, two radial bearings and an axial bearing are arranged in parallel, so that the axial space of the five-degree-of-freedom suspension system is increased, the axial length of a rotor is extended, the flexibility is increased, the mutual coupling of the radial horizontal control magnetic field and the radial vertical control magnetic field of a radial permanent magnet offset bearing is abnormal, the control logic of the magnetic suspension system is simplified, and the stability and the reliability of the magnetic suspension bearing control system are poor, the application provides a novel magnetic circuit decoupling five-degree-of-freedom radial mixed magnetic suspension bearing assembly,

as shown in fig. 9, the rotating shaft realizes five-degree-of-freedom suspension, that is, five-degree-of-freedom direction control of the rotating shaft, i.e., rotation around the Y axis, translation along the Y axis (radial vertical direction), rotation around the X axis, translation along the X axis (radial horizontal direction), and translation along the Z axis (axial direction).

As shown in fig. 1 and 3, the permanent magnet 11, the outer stator core 10, the first radial vertical stator 21, the second radial vertical stator 31, the radial vertical winding 22, the second radial vertical winding 32, and the radial vertical rotor 42 form a radial vertical two-degree-of-freedom control system, so that the rotating shaft 41 translates along the Y axis direction and rotates around the X axis. The permanent magnet 11, the outer stator core 10, the first radial horizontal stator 51, the second radial horizontal stator 61, the first radial horizontal winding 52, the second radial horizontal winding 62, the first radial horizontal rotor 43, the second radial horizontal rotor 44 and the radial vertical rotor 42 form an axial-radial horizontal direction three-degree-of-freedom control system, and the rotating shaft 41 translates along the X, Z axis direction and rotates around the Y axis. The five-freedom-degree magnetic suspension bearing double-radial-axial integrated structure reduces the axial occupied space of a magnetic suspension system, shortens the length of a rotating shaft, realizes the independent control of the radial direction and the horizontal direction of the rotating shaft because the radial vertical magnetic control field and the horizontal control magnetic field are mutually independent and are not coupled, thereby simplifying the control logic of the magnetic suspension system and improving the stability and the reliability of the system.

The rotating shaft realizes radial vertical two-degree-of-freedom suspension control, namely translation along the Y axis, and the working principle of rotation around the X axis is shown in fig. 1, a permanent magnet 11 (the outer side is an N pole, and the inner side is an S pole) generates a radial vertical bias magnetic field C1 which passes through a first radial vertical stator 21 and a second radial vertical stator 31 at the left end and the right end of the permanent magnet 11 and forms a closed loop with a radial vertical rotor 42, bias magnetic fluxes are formed between the first radial vertical stator 21 and the second radial vertical stator 31 and main air gaps of the radial vertical rotor 42, when the rotating shaft is at a balance position, the bias magnetic fluxes between an upper main air gap and a lower main air gap in the vertical direction are the same, and the rotating shaft is in. When the rotating shaft 41 bears impact and deflects downwards along the Y axis (vertical direction), the upper side gap in the vertical direction is increased, the lower side gap is decreased, so that the bias magnetic flux in the upper main air gap is decreased, and the bias magnetic flux in the lower main air gap is increased. The radial vertical winding 22 and the second radial vertical winding 32 are fed with the same control current to generate a control magnetic field, the radial vertical rotor 42 forms a closed loop through the first radial vertical stator 21 and the second radial vertical stator 31 to form a radial vertical control magnetic field C2, the bias magnetic flux in the upper main air gap is increased, the bias magnetic flux in the lower main air gap is reduced, the upward suction force is larger than the downward suction force, the rotating shaft 41 deviates upwards, the balance position is recovered, the radial vertical control winding stops being electrified, and the translation control of the rotating shaft 41 along the Y-axis direction is realized. When the rotating shaft bears impact and rotates clockwise around the X axis to impact, main air gap magnetic flux between the first radial vertical stator 21 and the radial vertical rotor 42 changes, upper side air gap magnetic flux increases, lower side air gap magnetic flux decreases, the rotating shaft 41 bears upward suction force, main air gap between the second radial vertical stator 31 and the radial vertical rotor 42 changes, upper side air gap magnetic flux decreases, lower side air gap magnetic flux increases, the rotating shaft bears downward suction force, the suction force at the left end and the right end forms clockwise torque, the rotating shaft 41 continuously rotates clockwise, and balance cannot be recovered. Radial vertical winding 22, the radial vertical winding 32 of second let in the opposite direction's control current, realize that 41 left ends of pivot upper side magnetic flux reduces, downside magnetic flux increase, 41 left ends of pivot bear down suction, 41 right-hand members of pivot upper side magnetic flux increase, downside magnetic flux reduces, 41 right-hand members of pivot bear upwards suction, 41 of pivot bear anticlockwise torque, resume gradually to balanced position, radial vertical control winding stops the circular telegram, realize that the pivot centers on X axle rotation control.

The working principle of the axial direction movement control is as shown in prior art fig. 1 and fig. 3, the permanent magnet 11 generates a bias magnetic field, an outer stator core 10, a first radial horizontal stator 51, a second radial horizontal stator 61, a first radial horizontal rotor 43, a second radial horizontal rotor 44 and a radial vertical rotor 42 at the left end and the right end form a closed loop to form an axial radial horizontal bias magnetic field C3, as shown in fig. 10, the first radial horizontal stator 51 and the second radial horizontal stator 61 respectively have suction forces F1, F2, F3 and F4 to the first radial horizontal rotor 43 and the second radial horizontal rotor 44, when the rotating shaft 41 is in the balanced position, the sizes of the F1, the F2, the F3 and the F4 are equal, the directions are different, the total stress of the rotating shaft 41 is zero, and the balanced state is kept. When the rotating shaft 41 moves downward in the radial direction (X axis), the lower gaps at the left and right ends decrease, the magnetic flux increases, the gap at the upper end increases, and the magnetic flux decreases, so that downward attractive force is generated at both ends of the rotating shaft 41 (F1 ═ F3 ═ F2 ═ F4), and the rotating shaft continues to move downward, and the balance position cannot be restored. The same control current is supplied to the first radial horizontal winding 52 and the second radial horizontal winding 62 to generate a control magnetic circuit, the control magnetic circuit passes through the first radial horizontal stator 51 and the second radial horizontal stator 61 respectively, the first radial horizontal rotor 43 and the second radial horizontal rotor 44 form a closed loop to form an axial radial horizontal control magnetic field C4, and control magnetic fluxes at the left end and the right end are adjusted to enable the left end and the right end of the rotating shaft to bear upward suction force (F1 ═ F3> F2 ═ F4), as shown in fig. 11, the rotating shaft 41 continuously translates upward until the rotating shaft returns to a balance position, the control windings stop supplying power, and the rotating shaft 41 is controlled to translate along the X axis direction. When the rotating shaft 41 is subjected to impact and rotates counterclockwise around the Y axis, the left end rotates downward, the gap at the upper end is increased, the magnetic flux is reduced, the gap at the lower end is reduced, the magnetic flux is increased, the attraction force at the lower end is greater than that at the upper end, the left end of the rotating shaft 41 is subjected to downward attraction force, the right end is opposite to that of the rotating shaft 41, the right end of the rotating shaft 41 is subjected to upward attraction force (F1 ═ F4 ═ F2 ═ F3), the rotating shaft 41 is continuously subjected to counterclockwise torque action and cannot be restored to a balance position, the first radial horizontal winding 52 and the second radial horizontal winding 62 are controlled by the left end and the right end, control currents with equal magnitudes and opposite directions are supplied to the two ends, so that the left end of the rotating shaft is subjected to upward attraction force, and the right end is subjected to downward attraction force. As shown in fig. 12, the rotating shaft 41 is subjected to a moment of clockwise rotation until the balance position is restored, and rotation control of the rotating shaft 41 around the Y axis is realized. When the rotating shaft 41 axially moves leftwards, the gap between the stator and the rotor at the left end is increased, the magnetic flux is reduced, that is, F1 and F2 are reduced, similarly, the right ends F3 and F4 are increased, the rotating shaft 41 continuously bears the load action leftwards and cannot be restored to the balance position, currents in opposite directions are alternately introduced into the first radial horizontal winding 52, the currents in opposite directions respectively achieve that the attraction forces F1 and F1 shown in fig. 13 are equal in size and different in direction, the attraction forces F2 and F2 are equal in size and different in direction, positive currents are introduced into the control windings by the F1 and the F2, the attraction forces generated by the stator to the rotor are introduced into the control windings, negative currents are introduced into the control windings by the F1 and the F2, the attraction forces generated by the stator to the rotor are caused by the stator to intermittently bear the displacement load action rightwards until the rotating shaft 41 is restored to the balance position, the.

The radial mixed type magnetic suspension bearing assembly with the structure solves the problems that a magnetic suspension system is large in axial span, long in rotating shaft length, large in flexibility, multiple in control components and high in material cost of the magnetic suspension system due to the fact that double radial bearings and axial bearings are arranged in parallel in the prior art. By adopting the bearing structure in the prior art, the coupling of the magnetic circuit is controlled by radial horizontal and vertical degrees of freedom, so that the control logic is complex, the function of the radial and axial degree of freedom control winding is single, and the reliability of a control system is low.

By adopting the radial mixed magnetic suspension bearing assembly, the double radial bearings and the axial bearings are in an integrated structure, the axial-radial horizontal stator magnetic poles have a conical angle, and the generated force can control the axial degree of freedom and the radial horizontal degree of freedom of the rotating shaft. The radial hybrid magnetic suspension bearing assembly is small in axial space, short in rotating shaft length and small in flexibility, the whole suspension system shares one permanent magnet 11, the axial-radial horizontal freedom degree shares one set of control components, the number of the components is reduced, and the material cost of the magnetic suspension system is low. The dual-radial direction adopts an integrated structure, the dual-radial magnetic poles realize four-degree-of-freedom suspension on the rotating shaft, the rotating shaft 41 is axially controlled by utilizing the edge effect of the magnetic poles, five-degree-of-freedom suspension of the rotating shaft 41 is realized, the number of components is reduced, and the material cost and the occupied space of the axial bearing are saved. The radial horizontal degree of freedom control system and the vertical degree of freedom control system are independently arranged, so that the radial horizontal degree of freedom control magnetic circuits and the vertical degree of freedom control magnetic circuits are independent and not coupled with each other, the radial degree of freedom control logic is simplified, and the stability and the reliability of the radial control of the magnetic suspension bearing are improved. Radial and axial freedom degree multi-winding control is adopted, so that the magnetic suspension system is in a non-control state when a single-winding control fault occurs, and the stability and reliability of the magnetic suspension system are improved.

Furthermore, in the double-radial-axial magnetic suspension bearing integrated structure, the axial-radial horizontal stator is a conical magnetic pole, the generated force can control the axial movement and the radial horizontal movement of the rotating shaft, the radial horizontal degree of freedom and the axial degree of freedom share one set of control elements, the magnetic suspension axial occupied space is reduced, the length of the rotating shaft is short, the flexibility is small, the number of components is reduced, and the material cost is saved. As shown in fig. 5, the dual radial magnetic poles realize four-degree-of-freedom suspension for the rotating shaft 41, and the axial control of the rotating shaft 41 is realized by utilizing the magnetic pole edge effect, so that five-degree-of-freedom suspension of the rotating shaft is realized, the number of components is reduced, and the material cost and the occupied space of the axial bearing are saved.

As shown in fig. 14, in the embodiment of the present application, a bearing assembly structure with radial four degrees of freedom and axial arrangement of control magnetic poles is further provided, and the control magnetic fields of the magnetic suspension assembly adopting the embodiment are not coupled and are independent of each other, so that the control logic of the radial degrees of freedom is simplified, and the stability of radial control of the magnetic suspension bearing is improved.

Specifically, as shown in fig. 14-17, in another embodiment of the present application, a radial hybrid magnetic levitation bearing assembly includes an outer stator core 10, a first radial vertical stator assembly 20, a first radial horizontal stator assembly 50, a rotor assembly 40. A permanent magnet 11 is provided in a first end of the outer stator core 10. A first radial vertical stator assembly 20 is disposed within the second end of the outer stator core 10. A first radial horizontal stator assembly 50 is disposed within the outer stator core 10 between the permanent magnets 11 and the first radial vertical stator assembly 20. The rotor assembly 40 is disposed in the outer stator core 10, and the rotor assembly 40 includes a rotating shaft 41. Wherein the first radial vertical stator assembly 20 and the first radial horizontal stator assembly 50 are configured to generate independent control magnetic fields, the permanent magnet 11 generates a bias magnetic field, and the first radial vertical stator assembly 20 and the first radial horizontal stator assembly 50 generate independent radial vertical control magnetic fields.

In the embodiment, the permanent magnet 11, the first radial vertical stator assembly 20, the first radial horizontal stator assembly 50 and the rotor assembly 40 are arranged in the outer stator core 10, and the first radial vertical stator assembly 20 and the first radial horizontal stator assembly 50 are arranged in a mode of generating independent control magnetic fields, so that the arrangement can avoid the coupling inside the radial hybrid magnetic suspension bearing assembly, the radial hybrid magnetic suspension bearing assembly adopting the structure has compact inside, the axial height of the radial hybrid magnetic suspension bearing assembly is reduced, and the stability and the reliability of the radial hybrid magnetic suspension bearing assembly are effectively improved.

Specifically, the first radial vertical stator assembly 20 includes a first radial vertical stator 21, radial vertical windings 22. The first radial vertical stator 21 is of an annular structure, the first radial vertical stator 21 is arranged in the second end of the outer stator core 10 and located on one side of the permanent magnet 11, and the inner circle of the first radial vertical stator 21 is provided with first stator teeth 211. The radial vertical winding 22 is wound on the first stator tooth 211. In the present embodiment, there are two first stator teeth 211, each first stator tooth 211 is provided with a radial vertical winding 22, and the two first stator teeth 211 are oppositely disposed. The first radial horizontal stator assembly 50 includes a first radial horizontal stator 51, first radial horizontal windings 52. The first radial horizontal stator 51 is of an annular structure, the first radial horizontal stator 51 is arranged in the outer stator core 10 and located between the permanent magnet 11 and the first radial vertical stator 21, the first radial horizontal stator 51 is coaxially arranged with the first radial vertical stator 21, and third stator teeth 511 are arranged on the inner circle of the first radial horizontal stator 51. The first radial horizontal winding 52 is wound around the third stator tooth 511. The third stator teeth 511 are preferably two, each third stator tooth 511 is provided with a first radial horizontal winding 52, and the two third stator teeth 511 are oppositely arranged.

To further improve the reliability of the magnetic levitation assembly, as shown in fig. 14, the radial hybrid magnetic levitation bearing assembly further includes a magnetism isolating ring 53. The magnetism isolating ring 53 is disposed in the outer stator core 10, and the magnetism isolating ring 53 is sleeved on the outer peripheral surface of the first radial horizontal stator 51. In the present embodiment, a first annular projection 15 and a second annular projection 16 are provided on an inner circumferential surface of the first end of the outer stator core 10 to the second end of the outer stator core 10. The internal diameter of first annular bulge 15 is less than the internal diameter of second annular bulge 16, permanent magnet 11 is the loop configuration, the excircle of permanent magnet 11 sets up with the interior round of first annular bulge 15 with laminating mutually, first radial horizontal stator 51 sets up in the annular cavity that the inner peripheral surface of second annular bulge 16 formed, and first radial horizontal stator 51 has the ground setting of distance with the inboard step face of first annular bulge 15, first radial vertical stator 21 sets up in outer stator core 10 and lies in one side of the step face of second annular bulge 16, and first radial vertical stator 21 has the ground setting of distance with the step face of second annular bulge 16. This arrangement can further improve the stability of the magnetic levitation assembly.

The radial hybrid magnetic levitation bearing assembly further comprises a first magnetic conductive ring 80 and a second magnetic conductive ring 90, the first magnetic conductive ring 80 being disposed in the outer stator core 10 and being located between the first annular protrusion 15 and the first radial horizontal stator 51, the second magnetic conductive ring 90 being disposed in the outer stator core 10 and being located between the first radial vertical stator 21 and the second annular protrusion 16.

The number of the first stator teeth 211 is multiple, the radial vertical windings 22 on each first stator tooth 211 independently generate a control magnetic field, when one of the radial vertical windings 22 fails, the access current of at least one of the remaining radial vertical windings 22 can be increased to generate a magnetic field with a preset intensity, the number of the third stator teeth 511 is multiple, the first radial horizontal winding 52 on each third stator tooth 511 independently generates a control magnetic field, and when one of the first radial horizontal windings 52 fails, the access current of at least one of the remaining first radial horizontal windings 52 can be increased to generate a magnetic field with a preset intensity.

As shown in fig. 1 and 9, the radial and axial freedom degree multi-winding control is adopted, the control windings on the stator magnetic poles are mutually independent, when the winding on a certain stator fails, the other control winding on the same stator can generate the same control magnetic field only by increasing the control current, so that the corresponding control function is realized, and the reliability of the radial control of the magnetic suspension bearing is improved.

Specifically, as shown in fig. 8, the magnetic circuit decoupling five-degree-of-freedom magnetic suspension bearing is formed by a double-radial-axial integrated system for controlling five degrees of freedom of a rotating shaft, and a component for realizing the control of the five degrees of freedom of the rotating shaft is composed of a rotating shaft 41, a radial vertical rotor 42, a first radial horizontal rotor 43, a second radial horizontal rotor 44, a precision nut 70, a first radial horizontal winding 52, a second radial horizontal winding 62, a first radial horizontal stator 51, a second radial horizontal stator 61, a radial vertical winding 22, a second radial vertical winding 32, a first radial vertical stator 21, a second radial vertical stator 31, a first magnetism isolating ring 23, a second magnetism isolating ring 33, an outer stator core 10 and a permanent magnet 11. Permanent magnet 11 is embedded in outer stator core 10 through the mode of viscose or heat jacket, there is the boss outside stator core 10 inboard (this boss can be annular structure promptly annular boss 12, also can be semicircular structure) to carry out axial positioning to the permanent magnet, it installs respectively on the both sides inner wall of outer stator core 10 to separate the magnetic ring through the mode of viscose, outer stator core 10 inner wall has the annular groove to separate the magnetic ring and carry out axial and radial positioning, radial vertical winding 22, the radial vertical winding 32 of second is fixed in first radial vertical stator 21 through the technology of viscose and ligature respectively, constitute radial vertical stator module on the radial vertical stator 31 of second, the both sides in outer stator core 10 are embedded in to radial vertical stator module through the mode of heat jacket and screw-up. Preferably, four bosses are arranged on two sides of the outer stator core 10 to axially position the radial vertical stator assembly, the first radial horizontal winding 52 and the second radial horizontal winding 62 are respectively wound on the first radial horizontal stator 51 and the second radial horizontal stator 61, the windings and the outer stator core 10 are fixed through viscose glue and a binding process to form the axial-radial horizontal stator assembly, the axial-radial horizontal stator assembly is installed on two sides of the outer stator core 10 in a hot sleeve and screw fixing mode, the bosses are arranged on two sides of the outer stator core 10 to axially fix the axial-radial horizontal stator assembly, and the fixed installation of the five-freedom-degree magnetic suspension bearing stator assembly is completed through the assembling process. Radial vertical rotor 42 is installed on pivot 41 by the left end through the thermal cover mode, and the protruding type step of pivot 41 right-hand member is to radial vertical rotor 42 axial positioning, and first radial horizontal rotor thermal cover is in the pivot left end, and the right flank closely laminates with radial vertical rotor 42 left surface, realizes axial fixity installation through accurate nut. And the second radial horizontal rotor is sleeved on the rotating shaft by the right end in a hot manner after the shaft is inserted, and is tightly attached to the radial vertical rotor 42, so that the axial positioning is realized, and the second radial horizontal rotor is locked and fixed by a precision nut, so that the installation and implementation of the whole five-freedom-degree magnetic suspension bearing are completed.

The radial vertical two-degree-of-freedom suspension system is composed of an outer stator iron core 10, permanent magnets, a radial vertical winding 22, a second radial vertical winding 32, a first radial vertical stator 21, a second radial vertical stator 31 and a radial vertical rotor 42, the translation of a rotating shaft 41 along a Y axis and the rotation control around the X axis are realized, the working principle is as shown in figure 3, the permanent magnets generate bias magnetic fields, bias magnetic flux is generated between the radial vertical stators and the rotor at the two ends, the radial vertical control windings at the two ends generate mutually independent control magnetic fields, the displacement modes at the two ends of the rotating shaft are independently controlled, the control logic is simplified, the stability of a suspension system is improved, the control windings at the two ends are both multi-winding control, when one winding fails, the other winding can adjust high control current to generate the same control magnetic field, so that the requirement regulation and control of the rotating shaft are realized, the reliability of the suspension system is improved, and the translation of the rotating shaft 41 along the Y-axis direction and the rotation control around the X-axis are realized.

An axial-radial three-degree-of-freedom magnetic suspension system is formed by an outer stator iron core 10, permanent magnets 11 (the permanent magnets are of an annular structure), a first radial horizontal winding 52, a second radial horizontal winding 62, a first radial horizontal stator 51, a second radial horizontal stator 61, a first radial horizontal rotor 43, a second radial horizontal rotor 44 and a radial vertical rotor 42, translation of a rotating shaft 41 along an X axis and a Z axis and rotation control around the Y axis are realized, the control principle is shown in figure 3, the permanent magnets generate bias magnetic fields, bias magnetic flux is generated between the axial-radial horizontal stators at the two ends and the axial-radial horizontal rotor, the control windings at the two ends generate mutually independent control magnetic fields, the load sizes at the two ends of the rotating shaft are independently controlled, and the load modes as shown in figures 10 to 13 are respectively generated, so that the control of the rotating shaft 41 in translation along the X-axis direction, translation along the Z-axis direction and rotation around the Y-axis is realized.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition to the foregoing, it should be noted that reference throughout this specification to "one embodiment," "another embodiment," "an embodiment," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment described generally throughout this application. The appearances of the same phrase in various places in the specification are not necessarily all referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with any embodiment, it is submitted that it is within the scope of the invention to effect such feature, structure, or characteristic in connection with other embodiments.

In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A radial hybrid magnetic levitation bearing assembly, comprising:

the stator comprises an outer stator core (10), wherein a permanent magnet (11) is arranged in the outer stator core (10);

a first radial vertical stator assembly (20), the first radial vertical stator assembly (20) disposed within the second end of the outer stator core (10) and on a first side of the permanent magnet (11);

a first radial horizontal stator assembly (50), the first radial horizontal stator assembly (50) disposed within a first end of the outer stator core (10) and on a second side of the permanent magnets (11) opposite the first side, the first radial vertical stator assembly (20) disposed opposite the first radial horizontal stator assembly (50);

a rotor assembly (40), the rotor assembly (40) being disposed within the outer stator core (10), the rotor assembly (40) including a rotating shaft (41);

wherein the first radial vertical stator assembly (20) is configured to generate an independent radial vertical control magnetic field, the first radial horizontal stator assembly (50) is configured to generate an independent radial horizontal control magnetic field, and the permanent magnet (11) generates a bias magnetic field.

2. The radial hybrid magnetic levitation bearing assembly of claim 1, wherein the first radial vertical stator assembly (20) comprises:

the first radial vertical stator (21), the first radial vertical stator (21) is of an annular structure, the first radial vertical stator (21) is arranged in the second end of the outer stator core (10) and located on the first side of the permanent magnet (11), and first stator teeth (211) are arranged on the inner circle of the first radial vertical stator (21);

the radial vertical winding (22), the radial vertical winding (22) is wound on the first stator tooth (211).

3. Radial hybrid magnetic levitation bearing assembly according to claim 2, characterized in that the first stator teeth (211) are two, each first stator tooth (211) having the radial vertical winding (22) arranged thereon, the two first stator teeth (211) being oppositely arranged.

4. The radial hybrid magnetic levitation bearing assembly of claim 2, wherein the first radial horizontal stator assembly (50) comprises:

a first radial horizontal stator (51), wherein the first radial horizontal stator (51) is of an annular structure, the first radial horizontal stator (51) is arranged in the first end of the outer stator core (10) and is opposite to the first radial vertical stator (21), the first radial horizontal stator (51) is coaxially arranged with the first radial vertical stator (21), and third stator teeth (511) are arranged on the inner circle of the first radial horizontal stator (51);

a first radial horizontal winding (52), the first radial horizontal winding (52) being wound around the third stator tooth (511).

5. The radial hybrid magnetic levitation bearing assembly as recited in claim 4, characterized in that there are two third stator teeth (511), each third stator tooth (511) being provided with the first radial horizontal winding (52), the two third stator teeth (511) being oppositely arranged.

6. The radial hybrid magnetic levitation bearing assembly as recited in claim 4, characterized in that a first annular protrusion (15) is provided on the inner circumferential surface from the first end of the outer stator core (10) to the second end of the outer stator core (10), the permanent magnet (11) is of an annular structure, and the outer circle of the permanent magnet (11) is arranged in conformity with the inner circle of the first annular protrusion (15).

7. The radial hybrid magnetic levitation bearing assembly as recited in claim 6, characterized in that the first annular protrusion (15) is provided with a first mounting step surface (151) and a second mounting step surface (152) on both sides, respectively, the first radial horizontal stator (51) is mounted on the first mounting step surface (151), the first radial vertical stator (21) is mounted on the second mounting step surface (152), a part of the first radial horizontal stator (51) is arranged with a distance to the surface of the first annular protrusion (15), and a part of the first radial vertical stator (21) is arranged with a distance to the surface of the first annular protrusion (15).

8. The radial hybrid magnetic levitation bearing assembly of claim 4,

the number of the first stator teeth (211) is multiple, the radial vertical windings (22) on each first stator tooth (211) independently generate a control magnetic field, and when one radial vertical winding (22) fails, the access current of at least one other radial vertical winding (22) can be increased to generate a magnetic field with preset intensity.

9. The radial hybrid magnetic levitation bearing assembly of claim 8,

the number of the third stator teeth (511) is multiple, the first radial horizontal winding (52) on each third stator tooth (511) independently generates a control magnetic field, and when one first radial horizontal winding (52) fails, the access current of the first radial horizontal winding (52) of at least one of the rest first stator teeth can be increased to generate a magnetic field with preset intensity.

10. Radial hybrid magnetic levitation bearing assembly according to claim 9, characterized in that a plurality of the first stator teeth (211) are symmetrically arranged in radial direction of the first radial vertical stator (21), a plurality of the third stator teeth (511) are symmetrically arranged in radial direction of the first radial horizontal stator (51), and a geometrical centre line of the oppositely arranged first stator teeth (211) of the plurality of first stator teeth (211) in radial direction of the first radial vertical stator (21) is arranged perpendicular to a geometrical centre line of the oppositely arranged third stator teeth (511) of the plurality of third stator teeth (511) in radial direction of the first radial horizontal stator (51).

11. A compressor comprising a radial hybrid magnetic levitation bearing assembly, wherein the radial hybrid magnetic levitation bearing assembly is the radial hybrid magnetic levitation bearing assembly of any of claims 1 to 10.