CN110645269B - Self-suspension axial magnetic suspension bearing - Google Patents
Self-suspension axial magnetic suspension bearing Download PDFInfo
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- CN110645269B CN110645269B CN201910768979.XA CN201910768979A CN110645269B CN 110645269 B CN110645269 B CN 110645269B CN 201910768979 A CN201910768979 A CN 201910768979A CN 110645269 B CN110645269 B CN 110645269B
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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
- F16C32/0459—Details of the magnetic circuit
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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
- F16C32/0485—Active magnetic bearings for rotary movement with active support of three degrees of freedom
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
The invention relates to a magnetic suspension bearing system, in particular to a self-suspension axial magnetic suspension bearing. A self-levitating axial magnetic levitation bearing comprising: the sleeve component comprises two magnetic conduction sleeves, the two magnetic conduction sleeves are sleeved on the rotor at intervals, and two sides of the two magnetic conduction sleeves are respectively provided with a magnetic isolation sleeve in a connecting manner; the electromagnetic assembly is assembled in the periphery of the sleeve assembly in a clearance mode and comprises a coil and a coil sleeve, the coil sleeve is provided with an opening, the opening faces the sleeve assembly, two ends of the coil sleeve correspond to the two magnetic conduction sleeves, the coil is arranged in the coil sleeve, and an electromagnetic wire generated after the coil is electrified passes through the coil sleeve, the two magnetic conduction sleeves and the rotor to form a complete magnetic loop. The technical problem that the rotor is easy to axially deviate and normal work is influenced in the prior art is solved.
Description
Technical Field
The invention relates to a magnetic suspension bearing system, in particular to a self-suspension axial magnetic suspension bearing.
Background
The magnetic suspension bearing is a novel high-performance bearing which utilizes electromagnetic force to suspend a rotor in a space so as to realize non-contact supporting between a motor stator and the rotor, has the advantages that the traditional bearing is high in allowable rotating speed, small in friction power consumption, free of lubrication, long in service life and the like, and is an ideal choice for high-speed occasion application. Due to the obvious superiority of the magnetic suspension technology, the magnetic suspension bearing technology becomes a hot spot of controversy research of researchers in various countries around the world. In order to enable the magnetic bearing technology to be widely applied to the mechanical industry, relevant preferential policies are issued in various countries around the world, and researchers and scholars in the country are encouraged to support the research and application of the magnetic bearing technology.
At present, the magnetic suspension technology is in the initial stage of application research, and the current axial magnetic bearing is complex in structure and needs a complex control system. During the working process, the rotor is easy to deviate from the original axial position during the high-speed running process, and the normal work of the whole system is influenced. Therefore, in order to expand the application prospect of the magnetic suspension bearing, the invention provides the self-suspension axial magnetic suspension bearing, which limits the axial displacement of the rotor, improves the reliability of a magnetic suspension system and plays an important role in the development of the magnetic suspension bearing.
Disclosure of Invention
In order to solve the technical problem that the rotor is easy to axially deviate and further normal work is influenced in the prior art, the invention provides a self-suspension axial magnetic suspension bearing, and the technical problem is solved. The technical scheme of the invention is as follows:
a self-levitating axial magnetic levitation bearing comprising: the sleeve component comprises two magnetic conduction sleeves, the two magnetic conduction sleeves are sleeved on the rotor at intervals, and two sides of the two magnetic conduction sleeves are respectively provided with a magnetic isolation sleeve in a connecting manner; the electromagnetic assembly is assembled on the periphery of the sleeve assembly in a clearance mode and comprises a coil and a coil sleeve, the coil sleeve is provided with an opening, the opening faces the sleeve assembly, two ends of the coil sleeve are arranged corresponding to the two magnetic conduction sleeves, the coil is arranged in the coil sleeve, and an electromagnetic wire generated after the coil is electrified forms a complete magnetic loop through the coil sleeve, the two magnetic conduction sleeves and the rotor; the electromagnetic component is arranged on the rack, the rack is in a step shape with the inner peripheral surface where the electromagnetic component is connected, the outer peripheral surface of the electromagnetic component is connected with the inner peripheral surface of the rack, one end of the electromagnetic component is abutted against the step surface of the rack, an end cover is fixedly connected to the rack, and the end cover is abutted against the other end of the electromagnetic component.
Through setting up sleeve subassembly and electromagnetic component, make the electromagnetic wire that coil produced in the electromagnetic component form complete magnetic circuit through coil cover, two magnetic conduction sleeves and rotor. When the rotor works normally, the magnetic loop can not generate axial acting force on the rotor; if the rotor is axially deviated, the relative axial positions of the two ends of the coil sleeve and the magnetic conduction sleeve are changed, the relative area between the magnetic conduction sleeve and the two ends of the coil sleeve is reduced, the electromagnetic attraction force generated between the coil sleeve and the magnetic conduction sleeve generates an axial component force, the axial component force is opposite to the direction of the axial deviation of the rotor, and therefore the rotor can be pulled back to a normal working position.
Further, the two ends of the coil sleeve are aligned with the two magnetic conduction sleeves in the middle respectively, and gaps exist between the two ends of the coil sleeve and the corresponding magnetic conduction sleeves.
Further, the axial thickness of the magnetic conductive sleeve is equal to the axial thickness of the two ends of the corresponding coil sleeve.
Furthermore, the coil sleeve is U-shaped, the coil sleeve is composed of a coil sleeve body and a coil cover plate, the cross section of the coil sleeve body is L-shaped, the coil cover plate is in a straight line shape, and one end of the coil sleeve body is fixedly connected with one end of the coil cover plate.
Further, the inner periphery of the coil is provided with a magnetism isolating ring.
Based on the technical scheme, the invention can realize the following technical effects:
1. according to the self-suspension axial magnetic suspension bearing, the sleeve component and the electromagnetic component are arranged, so that an electromagnetic wire generated by a coil in the electromagnetic component forms a complete magnetic loop through the coil sleeve, the two magnetic conduction sleeves and the rotor. When the rotor works normally, the magnetic loop can not generate axial acting force on the rotor; if the rotor is axially deviated, the relative axial positions of the two ends of the coil sleeve and the magnetic conduction sleeve can be changed, the relative area between the magnetic conduction sleeve and the two ends of the coil sleeve is reduced, and the electromagnetic attraction force generated between the coil sleeve and the magnetic conduction sleeve can generate axial component force which is opposite to the direction of the axial deviation of the rotor, so that the rotor can be pulled back to a normal working position, and the technical problem that the rotor is easily axially deviated and further normal working is influenced in the prior art is solved;
2. according to the self-suspension axial magnetic suspension bearing, the outer peripheral surface of the electromagnetic assembly is connected with the inner peripheral surface of the rack, and the two ends of the electromagnetic assembly are limited by the rack and the end cover respectively, so that the electromagnetic assembly can be detachably mounted; in the arrangement of the electromagnetic assembly, the coil sleeve is composed of two parts, so that the coil can be conveniently arranged in the coil sleeve, and the coil cover plate is arranged on the coil sleeve body by using screws, thereby not only supporting the coil, but also axially positioning the coil and simultaneously axially positioning the magnetism isolating ring; the magnetism isolating ring is arranged on the inner ring of the coil, so that the magnetism isolating ring plays a role in supporting the coil on one hand and prevents the coil and the coil sleeve from forming a complete magnetic loop on the other hand;
3. the self-suspension axial magnetic suspension bearing provided by the invention generates the adsorption force through the electromagnetic assembly, so that the purposes of axial suspension and limiting of the rotor can be achieved only by electrifying the electromagnetic assembly, the operation is simple and convenient, and the structure is simplified.
Drawings
FIG. 1 is a schematic structural diagram of a self-levitating axial magnetic suspension bearing of the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
in the figure: 1-a sleeve assembly; 11-a magnetically conductive sleeve; 12-a magnetic isolation sleeve; 2-an electromagnetic assembly; 21-a coil; 22-a coil housing; 221-a coil housing; 222-a coil cover plate; 23-a magnetism isolating ring; 3-a rotor; 4-a frame; 5-end cap.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
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.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
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.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.
The embodiment provides a self-suspension axial magnetic suspension bearing, which comprises a sleeve component 1 and an electromagnetic component 2, wherein the sleeve component 1 is sleeved on a rotor 3, the electromagnetic component 2 generates a magnetic field after being electrified, an electromagnetic wire passes through the rotor 3 through a magnetic conduction sleeve 11 in the sleeve component 1 to form a specific magnetic loop, if the rotor 3 generates axial deviation, the sleeve component 1 on the sleeve component 1 is driven to generate axial deviation, the relative area between the magnetic conduction sleeve 11 in the sleeve component 1 and the electromagnetic component 2 is reduced, an electromagnetic suction force generated between the electromagnetic component 2 and the magnetic conduction sleeve 11 can generate an axial component force, the axial component force is opposite to the direction of the axial deviation of the rotor 3, and thus the rotor 3 can be pulled back to a normal working position.
The sleeve component 1 comprises two magnetic conduction sleeves 11, the two magnetic conduction sleeves 11 are arranged at intervals, two sides of the two magnetic conduction sleeves 11 are connected with magnetic isolation sleeves 12, specifically, the magnetic isolation sleeves 12 can be 3, and the 3 magnetic isolation sleeves 12 are respectively positioned between the two magnetic conduction sleeves 11 and outside the two magnetic conduction sleeves 11 and are connected with the adjacent magnetic conduction sleeves 11. The magnetism isolating sleeve 12 and the magnetism conducting sleeve 11 can be fixedly connected into a whole; or, the connection is not needed, when the rotor 3 is sleeved, the magnetic isolation sleeve 12 and the magnetic conduction sleeve 11 are tightly sleeved on the rotor 3, and the boundaries of the adjacent magnetic isolation sleeve 12 and the magnetic conduction sleeve 11 are connected.
Specifically, the coil sleeve 22 has an opening facing the sleeve assembly 1, two ends of the opening of the coil sleeve 22 are disposed corresponding to the two magnetic conductive sleeves 11 of the sleeve assembly 1, and the electromagnetic wire generated by the coil 21 is conducted to the corresponding magnetic conductive sleeve 11 through one end of the coil sleeve 22, and then reaches the other end of the coil sleeve 22 through the rotor 3 and the other magnetic conductive sleeve 11, so as to form a completed magnetic loop. Preferably, in order to facilitate installation, the coil sleeve 22 is separately disposed, the coil sleeve 22 is U-shaped, the coil sleeve 22 is composed of a coil sleeve body 221 and a coil cover plate 222, wherein the cross section of the coil sleeve body 221 is L-shaped, the cross section of the coil cover plate 222 is in a straight line shape, one end of the coil sleeve body 221 is fixedly connected with one end of the coil cover plate 222, and the other end of the coil sleeve body 221 and the other end of the coil cover plate 222 are disposed corresponding to the two magnetic conductive sleeves 11, respectively. Preferably, the other end of the coil sleeve body 221 is aligned with and spaced from the corresponding magnetic conductive sleeve 11; the other end of the coil cover plate 222 is aligned with the corresponding magnetic conductive sleeve 11 in the center and is disposed with a proper gap, which both ensures that the coil cover 22 does not affect the normal rotation of the rotor 3 and enables the coil cover 22 to conduct the electromagnetic wire to the magnetic conductive sleeve 11. Preferably, the axial thickness of both ends of the coil housing 22 is equal to the axial thickness of the magnetically conductive sleeve 11.
The coil 21 is fitted into the coil housing 22, and the coil housing body 221 and the coil cover plate 222 cooperate to axially restrain the coil 21. Preferably, in order to ensure that the magnet wires circulate according to a predetermined route and also to radially limit the coil 21, the electromagnetic assembly 2 further includes a magnetic isolation ring 23, and the magnetic isolation ring 23 is disposed at the opening of the coil sleeve 22 and is located on the inner periphery of the coil 21, so as to support the coil 21 and prevent the coil 21 and the coil sleeve 22 from forming a complete magnetic loop.
The electromagnetic assembly 2 is arranged on the rack 4, the inner peripheral surface of the rack 4 is in a step shape, the outer peripheral surface of a coil sleeve 22 of the electromagnetic assembly 2 is connected with the inner peripheral surface of the rack 4, one end of the coil sleeve 22 abuts against the step surface of the inner peripheral surface of the rack 4, an end cover 5 is fixedly connected onto the rack 4, and the end cover 5 abuts against the other end of the coil sleeve 22, so that the limiting installation of the electromagnetic assembly 2 is realized. Specifically, the coil sleeve body 221 of the coil sleeve 22 abuts against the stepped surface, and the end cap 5 abuts against the coil cover plate 222, so that the installation is convenient.
Based on the structure, the working principle of the self-suspension axial magnetic suspension bearing of the embodiment is as follows: when the rotor 3 does not generate axial deviation and normally works, an electromagnetic wire generated by electrifying the electromagnetic assembly 2 forms a complete magnetic loop through the coil sleeve 22, the two magnetic conduction sleeves 11 and the rotor 3, two ends of the coil sleeve 22 are opposite to the two magnetic conduction sleeves 11, the electromagnetic wire is conducted to the magnetic conduction sleeve 11 from the end part of the coil sleeve 22 or the magnetic conduction sleeve 11 to the end part of the coil sleeve 22 along the direction vertical to the axial direction, only radial electromagnetic attraction force can be generated between the coil sleeve 22 and the magnetic conduction sleeve 11, axial component force cannot be generated, and the plurality of generated radial electromagnetic attraction forces are balanced and normal rotation of the rotor 3 cannot be influenced because the coil sleeve 22 is circumferentially distributed;
when the rotor 3 is axially deviated, the relative axial positions of the two ends of the magnetic conductive sleeve 11 and the coil sleeve 22 are changed, the relative area between the magnetic conductive sleeve 11 and the two ends of the coil sleeve 22 is reduced, and the electromagnetic attraction force generated between the coil sleeve 22 and the magnetic conductive sleeve 11 generates an axial component force, which is opposite to the direction of the axial deviation of the rotor 3, so that the rotor 3 can be pulled back to a normal working position.
The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Claims (5)
1. A self-levitating axial magnetic levitation bearing, comprising:
the magnetic-isolation rotor comprises a sleeve component (1), wherein the sleeve component (1) comprises two magnetic-conduction sleeves (11), the two magnetic-conduction sleeves (11) are sleeved on a rotor (3) at intervals, and two sides of the two magnetic-conduction sleeves (11) are respectively provided with a magnetic-isolation sleeve (12) in a connecting mode;
the electromagnetic assembly (2) is assembled on the periphery of the sleeve assembly (1) in a clearance mode, the electromagnetic assembly (2) comprises a coil (21) and a coil sleeve (22), the coil sleeve (22) is provided with an opening, the opening faces the sleeve assembly (1), two ends of the coil sleeve (22) are arranged corresponding to the two magnetic conduction sleeves (11), the coil (21) is arranged in the coil sleeve (22), and an electromagnetic wire generated after the coil (21) is electrified forms a complete magnetic loop through the coil sleeve (22), the two magnetic conduction sleeves (11) and the rotor (3);
electromagnetic component (2) set up in frame (4), frame (4) with the interior periphery that electromagnetic component (2) meet is the echelonment, the outer peripheral face of electromagnetic component (2) with the interior periphery of frame (4) meets, the one end of electromagnetic component (2) supports and leans on the ladder face of frame (4), fixedly connected with end cover (5) is gone up in frame (4), end cover (5) support and lean on the other end of electromagnetic component (2).
2. A self-levitating axial magnetic suspension bearing according to claim 1, wherein the coil sleeve (22) has two ends aligned centrally with the two magnetically conductive sleeves (11), respectively, and a gap exists between the two ends of the coil sleeve (22) and the corresponding magnetically conductive sleeve (11).
3. A self-levitating axial magnetic suspension bearing according to claim 2, characterized in that the axial thickness of said magnetically conductive sleeve (11) is equal to the axial thickness of the two ends of the corresponding coil sheath (22).
4. The self-suspension axial magnetic suspension bearing as claimed in claim 1, wherein the coil sleeve (22) is U-shaped, the coil sleeve (22) is composed of a coil sleeve body (221) and a coil cover plate (222), the cross-section of the coil sleeve body (221) is L-shaped, the coil cover plate (222) is in a straight line shape, and one end of the coil sleeve body (221) is fixedly connected with one end of the coil cover plate (222).
5. A self-levitating axial magnetic suspension bearing according to any one of claims 1 to 4, characterized in that the inner circumference of the coil (21) is provided with a magnetic shield (23).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910768979.XA CN110645269B (en) | 2019-08-20 | 2019-08-20 | Self-suspension axial magnetic suspension bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910768979.XA CN110645269B (en) | 2019-08-20 | 2019-08-20 | Self-suspension axial magnetic suspension bearing |
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| CN110645269A CN110645269A (en) | 2020-01-03 |
| CN110645269B true CN110645269B (en) | 2020-09-15 |
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| CN201910768979.XA Active CN110645269B (en) | 2019-08-20 | 2019-08-20 | Self-suspension axial magnetic suspension bearing |
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| CN201730962U (en) * | 2010-04-29 | 2011-02-02 | 苏州同心医疗器械有限公司 | Five-degree-of-freedom permanent magnet biased magnetic bearing |
| CN201747782U (en) * | 2010-05-24 | 2011-02-16 | 山东科技大学 | Low power consumption single-steady-state zero-gravity action radial magnetic bearing |
| CN204371941U (en) * | 2015-01-05 | 2015-06-03 | 山东大学 | One realizes rotor five-degree magnetic suspension structure by axial magnetic bearing |
| CN106438696A (en) * | 2016-11-21 | 2017-02-22 | 南京磁谷科技有限公司 | Magnetic bearing structure |
| CN108374837A (en) * | 2018-02-06 | 2018-08-07 | 中国人民解放军战略支援部队航天工程大学 | A kind of three magnetic circuit Lorentz force magnetic bearings |
| CN108644228A (en) * | 2018-05-22 | 2018-10-12 | 北京航空航天大学 | A kind of small volume low watt consumption axial magnetic suspension bearing |
| CN110056574A (en) * | 2019-04-17 | 2019-07-26 | 山东天瑞重工有限公司 | A kind of magnetic bearing of high speed magnetic suspension motor |
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2019
- 2019-08-20 CN CN201910768979.XA patent/CN110645269B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH05172140A (en) * | 1991-12-26 | 1993-07-09 | Nippon Seiko Kk | Bearing device |
| JPH06235420A (en) * | 1993-02-05 | 1994-08-23 | Koyo Seiko Co Ltd | Spindle motor |
| US5987871A (en) * | 1997-07-09 | 1999-11-23 | W. Schlafhorst Ag & Co. | Open-end spinning device with a spinning rotor |
| US6121704A (en) * | 1997-07-30 | 2000-09-19 | Nsk Ltd. | Magnetic bearing |
| JP2004232738A (en) * | 2003-01-30 | 2004-08-19 | Koyo Seiko Co Ltd | Flywheel electric power storage device |
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| CN201747782U (en) * | 2010-05-24 | 2011-02-16 | 山东科技大学 | Low power consumption single-steady-state zero-gravity action radial magnetic bearing |
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| CN110645269A (en) | 2020-01-03 |
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