CN115411871A - Magnetic suspension motor - Google Patents
Magnetic suspension motor Download PDFInfo
- Publication number
- CN115411871A CN115411871A CN202211043566.3A CN202211043566A CN115411871A CN 115411871 A CN115411871 A CN 115411871A CN 202211043566 A CN202211043566 A CN 202211043566A CN 115411871 A CN115411871 A CN 115411871A
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- Prior art keywords
- rotor
- bearing
- radial
- axial
- magnetic bearing
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/161—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields radially supporting the rotary shaft at both ends of the rotor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C32/00—Bearings not otherwise provided for
- F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
- F16C32/0406—Magnetic bearings
- F16C32/044—Active magnetic bearings
- F16C32/0474—Active magnetic bearings for rotary movement
- F16C32/0493—Active magnetic bearings for rotary movement integrated in an electrodynamic machine, e.g. self-bearing motor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/24—Casings; Enclosures; Supports specially adapted for suppression or reduction of noise or vibrations
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
The invention relates to a magnetic suspension motor. The magnetic suspension motor comprises a rotor assembly, a stator and a protective bearing group, wherein the rotor assembly comprises a first rotor, a second rotor and a third rotor which are sequentially arranged together, the first rotor, the second rotor and the third rotor are detachably arranged together, and the first rotor, the third rotor and the protective bearing group are combined to provide a buffer force when the rotor assembly falls; the protection bearing group is at least provided with a first radial damping ring and a second radial damping ring, and provides buffer force for the falling of the rotor assembly. According to the magnetic suspension motor provided by the invention, the rotor assembly is arranged into a three-section structure, and the buffer effect of the protective bearing group is utilized, so that the damage frequency of the rotor assembly can be reduced, the replacement is convenient, the maintenance cost is reduced, in addition, the structure is also convenient for the part heat sleeve on the rotor assembly, and the processing is convenient.
Description
Technical Field
The invention relates to the field of magnetic suspension motors, in particular to a magnetic suspension motor.
Background
Traditional mechanical bearing motor, because there is friction loss in the bearing, it is serious that the motor accomplishes to generate heat when high-power high-speed, has the noise big, and motor efficiency is low, the short-lived problem of bearing. The magnetic suspension motor is a permanent magnet motor which suspends a motor rotor to rotate by means of electromagnetic force, adopts a non-contact magnetic suspension bearing, has no friction loss, has high motor efficiency and long service life, and can achieve higher rotating speed and higher power.
When the magnetic suspension motor works, the radial magnetic bearing rotor acted on the rotor by electrifying the radial magnetic bearing stator suspends the rotor radially, the thrust disc acted on the rotor by electrifying the bearing magnetic bearing is pulled between the two axial magnetic bearing stators, and friction-free rotation of the motor is realized. When the motor rotor is severely interfered or the magnetic bearings are electrified abnormally, the magnetic suspension of the rotor is out of control and falls onto the protective bearing groups at the two ends, and when the rotor falls abnormally, the protective bearings at the two ends are severely impacted at a very high rotating speed, and the impact of high temperature and high load is very easy to cause the damage of the protective bearings or the deformation and the fracture of the rotor.
Disclosure of Invention
Based on the above description, the invention provides a magnetic suspension motor, which adopts a protective bearing group structure with a damping ring innovatively, when a rotor falls off abnormally, the damage of impact force to a protective bearing and a rotor assembly can be reduced, meanwhile, the rotor assembly is set to be a three-section pull rod type structure, when in maintenance, only a damaged part needs to be replaced, the whole rotor assembly does not need to be replaced, the maintenance cost is greatly saved, and in addition, the structure can also solve the problem that a part on the existing rotor assembly is inconvenient to heat.
The technical scheme for solving the technical problems is as follows: a magnetic suspension motor comprises a rotor assembly, a stator and a protection bearing group, wherein the protection bearing group comprises a first protection bearing group and a second protection bearing group which are respectively arranged on two axial sides of the stator; the rotor assembly comprises a first rotor, a second rotor and a third rotor which are sequentially arranged together, and the first rotor, the second rotor and the third rotor are detachably arranged together; the first protection bearing group and the second protection bearing group respectively penetrate through the first rotor and the third rotor and are separated from the first rotor and the third rotor to form a radial air gap, and the thicknesses of the air gaps are h1 and h2 respectively; the first protection bearing group at least comprises a first radial damping ring, and the thickness of the first radial damping ring is S1; the second protection bearing group at least comprises a second radial damping ring, and the thickness of the second radial damping ring is S2; the first radial damping ring and the second radial damping ring provide damping force for the falling of the rotor assembly.
On the basis of the technical scheme, the invention can be further improved as follows.
Preferably, the rotor assembly further comprises a first pull rod and a second pull rod, the first pull rod penetrates through the first rotor and is mounted on the second rotor, and the second pull rod penetrates through the third rotor and is mounted on the other side of the second rotor.
Preferably, the first rotor and the third rotor are matched with a spigot of the second rotor and/or the first pull rod and the second pull rod are matched with a thread of the second rotor.
Preferably, one side of the first pull rod and one side of the second pull rod, which are far away from the second rotor, are respectively provided with a locking nut, and the locking nuts and the pull rods are used for installing the first rotor and the third rotor on two sides of the second rotor respectively.
Preferably, the impact resistance of the material of the first rotor and the third rotor is greater than the impact resistance of the second rotor.
Preferably, the first protective bearing set and/or the second protective bearing set further include an axial damping ring, and the axial damping ring provides a damping force for axial displacement of the rotor assembly.
Preferably, the axial damping ring comprises a first axial damping ring and a second axial damping ring, and the first axial damping ring and the second axial damping ring are respectively arranged at two axial sides of the first protection bearing group or the second protection bearing group.
Preferably, the first radial damping ring and/or the second radial damping ring and/or the first bearing damping ring and/or the second axial damping ring are in a spring wave-shaped structure.
Preferably, at least two mechanical bearings in the first protective bearing group and/or the second protective bearing group are angular contact bearings.
Preferably, the magnetic bearing assembly further comprises a radial magnetic bearing, an axial magnetic bearing and a thrust disc, wherein the radial magnetic bearing is used for controlling the radial freedom degree of the rotor assembly; the thrust disc is mounted on the rotor assembly and is used to control the axial degree of freedom of the rotor assembly together with the axial magnetic bearing.
Preferably, the radial magnetic bearings comprise a first radial magnetic bearing and a second radial magnetic bearing, the first radial magnetic bearing at least comprises a first radial magnetic bearing stator and a first radial magnetic bearing rotor matched with the first radial magnetic bearing stator; the second radial magnetic bearing at least comprises a second radial magnetic bearing stator and a second radial magnetic bearing rotor matched with the second radial magnetic bearing stator; the first radial magnetic bearing rotor is arranged on the first rotor and axially aligns with and radially forms an air gap with the first radial magnetic bearing stator, the thickness L1 of the air gap is more than h1+ S1, the second radial magnetic bearing rotor is arranged on the third rotor and axially aligns with and radially forms an air gap with the second radial magnetic bearing stator, and the thickness L2 of the air gap is more than h2+ S2; the axial magnetic bearings at least comprise a first axial magnetic bearing and a second axial magnetic bearing, the thrust disc is arranged on the third rotor, and the axial freedom degree of the rotor assembly is controlled by the thrust disc between the first axial magnetic bearing and the second axial magnetic bearing through electromagnetic force.
Compared with the prior art, the technical scheme of the application has the following beneficial technical effects:
(1) According to the magnetic suspension motor provided by the invention, the protection bearing group with a buffering effect and the rotor assembly are arranged into a three-section structure, so that on one hand, the damage frequency of the rotor assembly can be reduced, on the other hand, the replacement is convenient, the maintenance cost is reduced, in addition, the structure is also convenient for the hot sleeve of parts on the rotor assembly, a small machine tool can process the parts, and the processing is simpler;
(2) The rotor assembly is installed by adopting spigot fit and a pull rod, so that on one hand, the consistency of synchronous rotation can be ensured, and on the other hand, the installation and the disassembly are convenient;
(3) The three sections are made of different materials, so that the production cost, the weight of the rotor assembly and the like can be reduced, and the damage frequency is better reduced;
(4) According to the magnetic suspension motor provided by the invention, the rotor component is suspended in the stator through magnetic acting force, the limit rotation speed of the motor is higher than that of a motor with a mechanical bearing, meanwhile, the bearing lubrication is not needed, the noise is low, the requirements of high rotation speed and high power are met, the production difficulty and the maintenance cost are reduced, and the magnetic suspension motor is not easy to damage and has long service life.
Drawings
Fig. 1 is a schematic structural diagram of a magnetic levitation motor with an impeller provided by an embodiment of the invention;
fig. 2 is a schematic structural diagram of a magnetic levitation motor without an impeller according to an embodiment of the present invention;
FIG. 3 is a schematic structural view of a three-segment tie rod rotor;
FIG. 4 is a schematic view of a protective bearing mounting structure with a damping ring;
FIG. 5 is a schematic view of a radial shock ring;
FIG. 6 is a schematic view of another radial shock ring;
fig. 7 is a structural schematic diagram of the axial damper ring.
In the drawings, the reference numbers indicate the following list of parts:
the structure comprises a stator 1, a rotor assembly 2, a protective bearing group 3, a radial magnetic bearing 4, an axial magnetic bearing 5, a thrust disc 6, a machine shell 7, a first bearing seat 8, a second bearing seat 9, a third bearing seat 10, an impeller 11, a first rotor 21, a second rotor 22, a third rotor 23, a first pull rod 24, a second pull rod 25, a locking nut 26, a first radial magnetic bearing 31, a second radial magnetic bearing 32, a first radial damping ring 311, a first mechanical bearing 312, a second radial damping ring 321, a second mechanical bearing 322 and an axial damping ring 323.
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Embodiments of the present application are given in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or be connected to the other element through intervening elements. As used herein, the singular forms "a", "an" and "the" may include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises/comprising," "includes" or "including," etc., specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.
As shown in fig. 1 and 2, a magnetic suspension motor comprises a rotor assembly 2 and a stator 1, wherein the stator 1 is fixedly installed on the inner peripheral wall of a casing 7, the rotor assembly 2 penetrates through the stator and is suspended by electromagnetic force to form an air gap with the stator 1 during working, and when the magnetic suspension motor works, friction loss is reduced, the motor efficiency is high, the service life is long, higher rotating speed and higher power can be achieved. However, when the motor rotor is severely interfered or the magnetic bearing is abnormally electrified, the rotor falls off due to out-of-control magnetic suspension, and when the rotor falls off abnormally, the rotor is severely impacted at a high rotating speed, and the impact of high temperature and high load is easy to cause the deformation and the fracture of the rotor. In the prior art, the rotor assembly is generally a whole, when the rotor assembly is damaged and needs to be maintained, the whole rotor assembly needs to be replaced, and the maintenance cost is extremely high.
Based on this, the magnetic suspension motor provided by the application is further provided with a protection bearing group, the protection bearing group further comprises a first protection bearing group 31 and a second protection bearing group 32, and the first protection bearing group 31 and the second protection bearing group 32 are respectively installed on two axial sides of the stator 1; meanwhile, the rotor assembly 2 is arranged into a three-section structure, specifically, referring to fig. 3, the rotor assembly 2 includes a first rotor 21, a second rotor 22 and a third rotor 23 which are sequentially installed together, the first rotor 21, the second rotor 22 and the third rotor 23 are detachably installed together, and the first rotor 21 and the third rotor 23 are combined with a protective bearing assembly to provide a buffering force when the rotor assembly falls;
the first protective bearing group 31 and the second protective bearing group 32 respectively penetrate through the first rotor 21 and the third rotor 23 and are separated from the first rotor 21 and the third rotor 23 to form a radial air gap, and the thicknesses of the air gaps are h1 and h2 respectively; first protection bearing group 31 includes first radial damping ring 311 at least, and the thickness of first radial damping ring 311 is S1, and the second protection bearing group includes second radial damping ring 321 at least, and the thickness of second radial damping ring 321 is S2, and first radial damping ring 311 and second radial damping ring 321 all are used for providing the cushion capacity when falling for rotor assembly 2.
It can be understood that the first protective bearing set 31 and the second protective bearing set 32 can be respectively installed through the first bearing seat 8 and the second bearing seat 9, and both the first bearing seat 8 and the second bearing seat 9 can be fixedly installed on the machine shell 7, so as to form a shell structure of the magnetic levitation motor. The first radial damping ring 311 and the second radial damping ring 321 may both adopt a wave-shaped spring structure, and may deform when subjected to a force, for example, the structure of the radial damping ring is as shown in fig. 5 and 6, the radial damping ring is sleeved on a mechanical bearing of the protection bearing set, and the corrugations may be disposed along the radial direction of the rotor assembly or may be disposed along the axial direction.
According to the invention, the rotor assembly 2 is set to be of a three-section structure, an air gap is formed between the second rotor 22 and the stator 1 when the second rotor works, the first rotor 21, the third rotor 23 and the protection bearing assembly are combined to provide a buffering force when the rotor assembly falls, and the rotor assembly is not easy to damage.
Furthermore, the first rotor 21 and the third rotor 23 can be made of materials with higher price, higher hardness and better shock resistance due to impact with the protective bearing group, and the second rotor is not impacted and can be made of materials with lower price, so that the shock resistance of the materials of the first rotor 21 and the third rotor 23 is larger than that of the second rotor 22, on one hand, the cost is saved, on the other hand, only the damaged part needs to be replaced during maintenance, the maintenance cost is low, after the large-sized rotor is divided into three sections, the hot sleeve installation of parts on a shaft is more convenient, a small machine tool can complete the processing, and the processing is convenient.
Illustratively, as shown in fig. 3, the rotor assembly 3 further includes a first pull rod 24 and a second pull rod 25, the first pull rod 24 is installed on the second rotor 22 through the first rotor 21, and the second pull rod 25 is installed on the other side of the second rotor 22 through the third rotor 23. Further, the first rotor 21 and the third rotor 23 are matched with a spigot of the second rotor 22, so that the rotation synchronism of the rotors is ensured.
Furthermore, the first pull rod 24 and the second pull rod 25 can be in threaded fit with the second rotor 22, and the mounting and dismounting are convenient. The sides of the first pull rod 24 and the second pull rod 25 away from the second rotor 22 are fastened by a lock nut 26.
When the rotor is installed, the first pull rod 24 is screwed to the second rotor 22 through threads, the first rotor 21 is sleeved, the first pull rod 24 is stretched through a hydraulic device, then the locking nut 26 is screwed, the first rotor 21 and the second rotor 22 are pressed into a whole through the pulling force of the first pull rod 24 after the hydraulic device is loosened, and the second rotor 22 and the third rotor 23 can be installed in the same way. It will be appreciated that the impeller 11 may be mounted by sleeving it around the tie-rod when the first rotor 21 or the third rotor 23 is mounted, the impeller 11 also being a spigot fit.
Further, the first protection bearing set 31 and/or the second protection bearing set 32 further include an axial damping ring 323, and the axial damping ring 323 provides a damping force for the axial displacement of the rotor assembly 2. Specifically, the axial damping rings 323 may include a first axial damping ring and a second axial damping ring, which are disposed at both axial sides of the first protective bearing set or the second protective bearing set, respectively. That is, the axial damping rings may be disposed on both sides of the first protection bearing group 31, or on both sides of the second protection bearing group 32, or on both sides of the first protection bearing group 31 and the second protection bearing group 32. The first axial shock absorption ring and the second axial shock absorption ring can also adopt a wave-shaped structure of a spring, the first axial shock absorption ring and the second axial shock absorption ring can be deformed under stress to play a role in buffering, and for example, the axial shock absorption rings can adopt the structure shown in fig. 7.
Further, at least two mechanical bearings in the first protective bearing set 31 and/or the second protective bearing set 32 are angular contact bearings. That is, the first mechanical bearing 312 and/or the second mechanical bearing 322 have two angular contact bearings. Exemplarily, the number of the first mechanical bearings is 1, the number of the second mechanical bearings is 2, the second mechanical bearings are angular contact bearings, axial damping rings are arranged on both sides, the second mechanical bearings 322 are arranged between the third rotor 23 and the lock nut 26 for fastening the third rotor 23, and an air gap is axially formed.
Illustratively, the electric machine further includes a radial magnetic bearing 4, an axial magnetic bearing 5, and a thrust disk 6, the radial magnetic bearing 4 electromagnetically controlling the radial degree of freedom of the rotor assembly 2, and the thrust disk 6 mounted on the rotor assembly 2 and electromagnetically controlling the axial degree of freedom of the rotor assembly 2 together with the axial magnetic bearing 5.
The radial magnetic bearing 4 comprises a first radial magnetic bearing and a second radial magnetic bearing, the first radial magnetic bearing at least comprises a first radial magnetic bearing stator and a first radial magnetic bearing rotor matched with the first radial magnetic bearing stator, the second radial magnetic bearing at least comprises a second radial magnetic bearing stator and a second radial magnetic bearing rotor matched with the second radial magnetic bearing stator, the first radial magnetic bearing stator and the second radial magnetic bearing stator are respectively arranged between the stator 1 and the protection bearing group, if the first radial magnetic bearing stator can be fixedly arranged on the first bearing seat 8, the first radial magnetic bearing rotor is arranged on the first rotor 21 and axially aligned with the first radial magnetic bearing stator to radially form an air gap, the thickness of the air gap L1 is more than h1+ S1, the second radial magnetic bearing rotor can be fixedly arranged on the second bearing seat 9, the second radial magnetic bearing rotor is arranged on the third rotor 23 and axially aligned with the second radial magnetic bearing stator to radially form an air gap, and the thickness of the air gap L2 is more than h2+ S2, so as to prevent the radial rotor from being collided.
The axial magnetic bearings 5 at least comprise a first axial magnetic bearing and a second axial magnetic bearing, the first axial magnetic bearing and the second axial magnetic bearing can be fixedly installed through a second bearing seat 9, a thrust disc 6 is installed on a third rotor, and the thrust disc 6 is positioned between the first axial magnetic bearing and the second axial magnetic bearing and controls the axial freedom degree of the rotor assembly 2 by electromagnetic force.
Illustratively, the end of the second bearing housing 9 is provided with a third bearing housing 10 to which a second protective bearing set 32 is fixed. The second radial damping ring 321 is disposed between the end surface of the second mechanical bearing 322 and the third bearing seat, and the two axial damping rings on the second protective bearing group 32 are disposed between the end surface of the second mechanical bearing 322 and the third bearing seat 10 and between the end surface of the second mechanical bearing 322 and the bearing pressure plate, respectively. A first radial damping ring 311 is arranged between the first mechanical bearing 312 and the first bearing seat 8.
For example, in actual installation, the first rotor 21 and the third rotor 23 may be set to be stepped, the first radial magnetic bearing rotor may be installed on a first step of the first rotor 21, the mechanical bearing in the first protective bearing set 3 may be set to correspond to a second step of the first rotor 21 and may have a certain axial limiting effect on the first rotor 21, the second radial magnetic bearing rotor and the thrust disc 6 may be installed on a first step of the third rotor 23, and the second protective bearing set may be set to correspond to a second step of the third rotor 23 and may have a certain axial limiting effect on the third rotor 23.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A magnetic suspension motor is characterized by comprising a rotor assembly, a stator and a protective bearing group,
the protective bearing group comprises a first protective bearing group and a second protective bearing group, and the first protective bearing group and the second protective bearing group are respectively arranged on two axial sides of the stator;
the rotor assembly comprises a first rotor, a second rotor and a third rotor which are sequentially arranged together, and the first rotor, the second rotor and the third rotor are detachably arranged together;
the first protection bearing group and the second protection bearing group respectively penetrate through the first rotor and the third rotor and are separated from the first rotor and the third rotor to form a radial air gap, and the thicknesses of the air gaps are h1 and h2 respectively;
the first protection bearing group at least comprises a first radial damping ring, and the thickness of the first radial damping ring is S1; the second protection bearing group at least comprises a second radial damping ring, and the thickness of the second radial damping ring is S2;
the first radial damping ring and the second radial damping ring provide damping force for the falling of the rotor assembly.
2. The magnetic levitation motor as recited in claim 1, wherein the rotor assembly further comprises a first tie rod and a second tie rod, the first tie rod is mounted on the second rotor through the first rotor, and the second tie rod is mounted on the other side of the second rotor through the third rotor.
3. Magnetic levitation electric machine according to claim 1 or 2, wherein the first and third rotors each engage with a second rotor spigot and/or the first and second tie rods engage with the second rotor screw thread.
4. The magnetic suspension motor as claimed in claim 3, wherein the first and second tie rods are provided with locking nuts on the sides away from the second rotor, and the locking nuts and tie rods mount the first and third rotors on the two sides of the second rotor, respectively.
5. Magnetic levitation electric machine according to claim 1, characterised in that the material of the first and third rotors has a better impact resistance than the second rotor.
6. The magnetic levitation motor as recited in claim 1, wherein the first and/or second protective bearing sets further comprise an axial damping ring that provides a damping force for rotor assembly axial displacement.
7. The maglev motor of claim 6, wherein the axial damping rings comprise first and second axial damping rings disposed on axial sides of the first or second protective bearing sets, respectively.
8. The magnetic levitation motor as recited in claim 6, wherein the first radial damping ring and/or the second radial damping ring and/or the first bearing damping ring and/or the second axial damping ring are spring wave structures.
9. The magnetic levitation motor as recited in claim 1, wherein the mechanical bearings in the first protective bearing set and/or the second protective bearing set are at least two and angular contact bearings.
10. The magnetically levitated motor of claim 1, further comprising a radial magnetic bearing, an axial magnetic bearing, and a thrust disk,
the radial magnetic bearing is used for controlling the radial degree of freedom of the rotor assembly; the thrust disc is arranged on the rotor assembly and is used for controlling the axial degree of freedom of the rotor assembly together with the axial magnetic bearing; the radial magnetic bearings include a first radial magnetic bearing and a second radial magnetic bearing,
the first radial magnetic bearing at least comprises a first radial magnetic bearing stator and a first radial magnetic bearing rotor matched with the first radial magnetic bearing stator;
the second radial magnetic bearing at least comprises a second radial magnetic bearing stator and a second radial magnetic bearing rotor matched with the second radial magnetic bearing stator;
a first radial magnetic bearing stator and a second radial magnetic bearing stator are respectively arranged between the stator and the protection bearing group, a first radial magnetic bearing rotor is arranged on a first rotor and axially aligned with the first radial magnetic bearing stator to radially form an air gap, the thickness L1 of the air gap is more than h1+ S1, a second radial magnetic bearing rotor is arranged on a third rotor and axially aligned with the second radial magnetic bearing stator to radially form an air gap, and the thickness L2 of the air gap is more than h2+ S2;
the axial magnetic bearings at least comprise a first axial magnetic bearing and a second axial magnetic bearing, the thrust disc is arranged on the third rotor, and the thrust disc is positioned between the first axial magnetic bearing and the second axial magnetic bearing and controls the axial freedom degree of the rotor assembly by electromagnetic force.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211043566.3A CN115411871A (en) | 2022-08-29 | 2022-08-29 | Magnetic suspension motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211043566.3A CN115411871A (en) | 2022-08-29 | 2022-08-29 | Magnetic suspension motor |
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| Publication Number | Publication Date |
|---|---|
| CN115411871A true CN115411871A (en) | 2022-11-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211043566.3A Pending CN115411871A (en) | 2022-08-29 | 2022-08-29 | Magnetic suspension motor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115898553A (en) * | 2022-11-11 | 2023-04-04 | 东方电气集团东方汽轮机有限公司 | Magnetic suspension turbine structure convenient to disassemble and assemble |
-
2022
- 2022-08-29 CN CN202211043566.3A patent/CN115411871A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115898553A (en) * | 2022-11-11 | 2023-04-04 | 东方电气集团东方汽轮机有限公司 | Magnetic suspension turbine structure convenient to disassemble and assemble |
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