CN110894855B - Magnetic suspension bearing assembly - Google Patents
Magnetic suspension bearing assembly Download PDFInfo
- Publication number
- CN110894855B CN110894855B CN201911370787.XA CN201911370787A CN110894855B CN 110894855 B CN110894855 B CN 110894855B CN 201911370787 A CN201911370787 A CN 201911370787A CN 110894855 B CN110894855 B CN 110894855B
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- China
- Prior art keywords
- magnetic bearing
- axial
- axial magnetic
- bearing
- rotor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 239000000725 suspension Substances 0.000 title claims abstract description 11
- 238000006073 displacement reaction Methods 0.000 claims abstract description 12
- 125000006850 spacer group Chemical group 0.000 claims abstract description 12
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 7
- 239000010949 copper Substances 0.000 claims description 6
- 229910052802 copper Inorganic materials 0.000 claims description 6
- 229910001369 Brass Inorganic materials 0.000 claims description 2
- 239000010951 brass Substances 0.000 claims description 2
- 230000006978 adaptation Effects 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
Classifications
-
- 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
- F16C32/0476—Active magnetic bearings for rotary movement with active support of one degree of freedom, e.g. axial magnetic bearings
-
- 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
- F16C2380/00—Electrical apparatus
- F16C2380/26—Dynamo-electric machines or combinations therewith, e.g. electro-motors and generators
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
The invention discloses a novel magnetic suspension bearing assembly, which relates to the technical field of magnetic suspension bearings and is characterized in that: the axial magnetic bearing rotor comprises an axial magnetic bearing I, an axial magnetic bearing II and an axial magnetic bearing rotor, wherein the axial magnetic bearing I is aligned with two ends of the axial magnetic bearing II which are arranged in parallel, the axial magnetic bearing rotor and an axial magnetic bearing spacer ring are arranged between the axial magnetic bearing I and the axial magnetic bearing II, a rotor component is arranged on the left side of the axial magnetic bearing rotor, the right end face of the axial magnetic bearing spacer ring is aligned with the right end face of the axial magnetic bearing I, an auxiliary bearing is arranged in an inner ring of the axial magnetic bearing II, and an axial displacement sensor is arranged on a thrust face of the axial magnetic bearing II. The auxiliary bearing and the axial displacement sensor are integrated in the axial magnetic bearing, so that the number of parts is reduced, the structure of the device is simplified, and a means for adjusting the working gap is simplified.
Description
Technical Field
The invention relates to the technical field of magnetic suspension bearings, in particular to a magnetic suspension bearing assembly.
Background
The motor supported by the magnetic suspension bearing is usually composed of a pair of axial magnetic bearings and a magnetic bearing rotor fixedly connected with the rotor, and meanwhile, a sensor for checking axial displacement and an auxiliary bearing structure as a safety guarantee are also arranged for realizing active control. The auxiliary bearing has the necessary role, and when being arranged in the main machine, the auxiliary bearing seat and the pressing ring have matched structures. Also, axial displacement sensors, because of their indispensable characteristics, require an outer structure such as a sensor holder to be disposed within the host machine. Because the matched structures are all required to be installed in the host, the problems of complicated assembly and disassembly, large occupied space, easy increase of fault points and the like are caused. In addition, since the assembly position of the auxiliary bearing is related to the working position of the rotor between the magnetic bearings, the additional structure may cause a difference in the assembly position of the auxiliary bearing, which is derived from the assembly error and the machining error of the auxiliary bearing housing.
Disclosure of Invention
The invention aims to: the invention aims to provide a magnetic suspension bearing assembly, which integrates an auxiliary bearing, an axial displacement sensor and an axial magnetic bearing, thereby effectively reducing the number of parts and simplifying the adjustment means of the working clearance of the magnetic bearing.
The invention adopts the scheme that: in order to achieve the above purpose, the present invention adopts the following technical scheme:
A magnetic suspension bearing assembly, characterized in that: the axial magnetic bearing rotor comprises an axial magnetic bearing I, an axial magnetic bearing II and an axial magnetic bearing rotor, wherein the axial magnetic bearing I is aligned with two ends of the axial magnetic bearing II which are arranged in parallel, the axial magnetic bearing rotor and an axial magnetic bearing spacer ring are arranged between the axial magnetic bearing I and the axial magnetic bearing II, a rotor component is arranged on the left side of the axial magnetic bearing rotor, the right end face of the axial magnetic bearing spacer ring is aligned with the right end face of the axial magnetic bearing I, an auxiliary bearing is arranged in an inner ring of the axial magnetic bearing II, and an axial displacement sensor is arranged on a thrust face of the axial magnetic bearing II.
Preferably, an end cover is arranged below the rotor component, and the rotor component is in threaded connection with the end cover; the axial magnetic bearing is characterized in that a left end face is arranged below the axial magnetic bearing rotor, the lower end face of the axial gap adjusting sleeve is connected with the upper end face of the end cover and is axially pressed through the end cover, one side, close to the auxiliary bearing, of the axial gap adjusting sleeve is provided with a step face, and the upper end face of the end cover and the step face of the axial gap adjusting sleeve are limited by the auxiliary bearing.
Preferably, the first axial magnetic bearing and the second axial magnetic bearing are internally provided with copper wires, a radial magnetic bearing is arranged above the first axial magnetic bearing, the left side of the radial magnetic bearing is connected with a rotor component, copper wires are arranged at the upper end and the lower end of the radial magnetic bearing, a magnetic bearing pressing plate is arranged above the radial magnetic bearing, a bearing seat is arranged below the magnetic bearing pressing plate, the magnetic bearing pressing plate is in threaded connection with the bearing seat, one side of the bearing seat is connected with the radial magnetic bearing, an axial magnetic bearing pressing plate is arranged below the bearing seat, the bearing seat is in threaded connection with the axial magnetic bearing pressing plate, and the lower end face of the second axial magnetic bearing is connected with the axial magnetic bearing pressing plate and axially compresses through the axial magnetic bearing pressing plate.
Preferably, the fit between the rotor component and the axial gap adjustment sleeve is a small interference fit.
Preferably, the axial gap adjusting sleeve is made of brass.
The beneficial effects are that: according to the invention, the axial displacement sensor is arranged on the thrust surface of the bearing magnetic bearing, so that the probability of faults is reduced, and the axial displacement sensor is well protected; the rotor component and the axial clearance adjusting sleeve are in small interference fit, so that the structure is stable, and the centering performance is good; by integrating the auxiliary bearing and the axial displacement sensor into the axial magnetic bearing, the number of parts is reduced, the structure of the device is simplified, and the means for adjusting the working gap is simplified.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.
Fig. 1 is a diagram of a magnetic bearing assembly.
Wherein: 1. a rotor component; 2. axial magnetic bearing I; 3. an axial magnetic bearing rotor; 4. an axial displacement sensor; 5. an axial gap adjusting sleeve; 6. an end cap; 7. an axial magnetic bearing spacer; 8. axial magnetic bearing II; 9. an auxiliary bearing; 10. an axial magnetic bearing platen; 11. a radial magnetic bearing; 12. a magnetic bearing platen; 13. a motor housing; 14. a bearing seat; 15. copper wire.
Detailed Description
In the description of the present invention, it should be noted that, if terms such as "left end", "right end", "upper end face" and the like are presented, the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, only for convenience of describing the present invention and simplifying the description, and does not indicate or imply that the indicated apparatus or element must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "connected," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The following describes specific embodiments of the present invention in detail with reference to the drawings.
As shown in fig. 1, the magnetic suspension bearing assembly comprises an axial magnetic bearing I2, an axial magnetic bearing II 8 and an axial magnetic bearing rotor 3, wherein the axial magnetic bearing I2 and the axial magnetic bearing II 8 are arranged in parallel, two ends of the axial magnetic bearing I2 are aligned, the axial magnetic bearing rotor 3 and an axial magnetic bearing spacer 7 are arranged between the axial magnetic bearing I2 and the axial magnetic bearing II 8, a rotor component 1 is arranged on the left side of the axial magnetic bearing rotor 3, the right end face of the axial magnetic bearing spacer 7 is aligned with the right end face of the axial magnetic bearing I2, an auxiliary bearing 9 is arranged in the inner ring of the axial magnetic bearing II 8, an axial displacement sensor 4 is arranged on the thrust face of the axial magnetic bearing II 8, and the axial magnetic bearing II plays a role of a sensor support at the moment to play a supporting role.
The lower end face of the axial magnetic bearing rotor 3 is connected with the upper end face of the end cover 6 and is axially pressed through the end cover 6, one side of the axial gap adjusting sleeve 5, close to the auxiliary bearing 9, is provided with a step face, the upper end face of the end cover 6 and the step face of the axial gap adjusting sleeve 5 are limited by the auxiliary bearing 9, and the lower end face of the axial magnetic bearing II 8 is connected with the axial magnetic bearing pressing plate 10 and is axially pressed through the axial magnetic bearing pressing plate 10.
Copper wires 15 are arranged in the first axial magnetic bearing 2 and the second axial magnetic bearing 8, a radial magnetic bearing 11 is arranged above the first axial magnetic bearing 2, the left side of the radial magnetic bearing 11 is connected with the rotor part 1, an end cover 6 is arranged below the rotor part 1, the rotor part 1 is in threaded connection with the end cover 6, and the rotor part 1 is in small interference fit with the axial gap adjusting sleeve 5; copper wires 15 are arranged at the upper end and the lower end of the radial magnetic bearing 11, a magnetic bearing pressing plate 12 is arranged above the radial magnetic bearing 11, a bearing seat 14 is arranged below the magnetic bearing pressing plate 12, the magnetic bearing pressing plate 12 is in threaded connection with the bearing seat 14, one side of the bearing seat 14 is connected with the radial magnetic bearing 11, an axial magnetic bearing pressure bearing 10 is arranged below the bearing seat 14, and the bearing seat 14 is in threaded connection with the axial magnetic bearing pressing plate 10.
The working process of the invention is as follows: after the coils in the first axial magnetic bearing 2 and the second axial magnetic bearing 8 are electrified, the two axial magnetic bearings generate electromagnetic attraction force, the rotor 3 of the attraction axial magnetic bearing is suspended between the two axial magnetic bearings, and the distance between the two axial magnetic bearings is limited by virtue of the spacer 7 of the axial magnetic bearings. During normal operation, during shutdown, even in the event of a failure, the axial magnetic bearings 2, 8 should not be in contact with the axial magnetic bearing rotor 3, so that a further limitation of the range of motion of the axial magnetic bearing rotor 3 is required. The range of motion of the axial magnetic bearing rotor 3 is further limited by the axial gap adjustment sleeve 5, the end cap 6 and the auxiliary bearing 9, ensuring that the auxiliary bearing 9 contacts the rotor component 1 first when shut down and failure occurs. By adjusting the distance between the two stepped surfaces of the axial gap adjusting sleeve 5 and the end cover 6, the movement range of the axial magnetic bearing rotor 3 can be limited to a region smaller than the thickness of the axial magnetic bearing spacer 7. The axial gap adjustment sleeve 5 is kept with a certain machining allowance, and after being assembled to the rotor component 1, the axial gap adjustment sleeve 5 is subjected to a size fine adjustment through actual measurement so as to ensure that the movement range of the axial magnetic bearing rotor 3 is in a proper range.
For ease of understanding, a specific example is set forth below for further explanation.
The axial magnetic bearing spacer 7 has a thickness of 32mm and the axial magnetic bearing rotor 3 has a thickness of 30mm, so that the range of motion of the axial magnetic bearing rotor 3 between the two axial magnetic bearings is 32-30=2mm. The initial value of the distance between the two step surfaces of the axial gap adjusting sleeve 5 and the end cover 6 is 1.8mm, and if the initial value is slightly larger and the axial gap adjusting sleeve 5 is removed by 0.3mm, the distance between the two step surfaces of the axial gap adjusting sleeve 5 and the end cover 6 becomes 1.8-0.3=1.5 mm. The side of the axial gap adjusting sleeve 5, which contacts the axial magnetic bearing rotor 3, is adjusted according to the interval position within 1.5mm to 2mm. In the whole adjustment process, only the axial gap adjustment sleeve 5 needs to be adjusted.
The foregoing is only a preferred embodiment of the invention, it being noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the invention.
Claims (3)
1. A magnetic suspension bearing assembly, characterized in that: the axial magnetic bearing rotor (3) is suspended between the axial magnetic bearing I (2) and the axial magnetic bearing II (8) under the action of electromagnetic attraction, the distance between the two axial magnetic bearings is limited by the axial magnetic bearing spacer ring (7), a rotor component (1) is arranged on the left side of the axial magnetic bearing rotor (3), the right end face of the axial magnetic bearing spacer ring (7) is aligned with the right end face of the axial magnetic bearing I (2), an auxiliary bearing (9) is arranged in the inner ring of the axial magnetic bearing II (8), and an axial displacement sensor (4) is arranged on the thrust face of the axial magnetic bearing II (8); an end cover (6) is arranged below the rotor component (1), and the rotor component (1) is in threaded connection with the end cover (6); an axial gap adjusting sleeve (5) with a left end face aligned is arranged below the axial magnetic bearing rotor (3), the lower end face of the axial gap adjusting sleeve (5) is connected with the upper end face of the end cover (6) and is axially pressed by the end cover (6), one side, close to the auxiliary bearing (9), of the axial gap adjusting sleeve (5) is provided with a step face, and the upper end face of the end cover (6) and the step face of the axial gap adjusting sleeve (5) limit the auxiliary bearing (9); the axial magnetic bearing I (2) with axial magnetic bearing II (8) internally mounted has copper line (15), the top of axial magnetic bearing I (2) is equipped with radial magnetic bearing (11), the left side of radial magnetic bearing (11) links to each other with rotor member (1), the upper and lower both ends of radial magnetic bearing (11) are equipped with copper line (15), radial magnetic bearing (11) top is equipped with magnetic bearing clamp plate (12), magnetic bearing clamp plate (12) below is equipped with bearing frame (14), magnetic bearing clamp plate (12) with bearing frame (14) threaded connection, one side of bearing frame (14) with radial magnetic bearing (11) link to each other, bearing frame (14) below is equipped with axial magnetic bearing clamp plate (10), bearing frame (14) with axial magnetic bearing clamp plate (10) threaded connection, axial magnetic bearing II (8) lower terminal surface links to each other and compresses tightly axially through axial magnetic bearing clamp plate (10).
2.A magnetic bearing assembly according to claim 1, wherein: the rotor part (1) and the axial clearance adjusting sleeve (5) are matched by adopting small interference fit.
3. A magnetic bearing assembly according to claim 1, wherein: the axial gap adjusting sleeve (5) is made of brass.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911370787.XA CN110894855B (en) | 2019-12-26 | 2019-12-26 | Magnetic suspension bearing assembly |
| PCT/CN2020/076887 WO2021128573A1 (en) | 2019-12-26 | 2020-02-27 | Novel magnetic suspension bearing assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911370787.XA CN110894855B (en) | 2019-12-26 | 2019-12-26 | Magnetic suspension bearing assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110894855A CN110894855A (en) | 2020-03-20 |
| CN110894855B true CN110894855B (en) | 2024-05-28 |
Family
ID=69788029
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911370787.XA Active CN110894855B (en) | 2019-12-26 | 2019-12-26 | Magnetic suspension bearing assembly |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN110894855B (en) |
| WO (1) | WO2021128573A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113794342B (en) * | 2021-08-11 | 2022-07-15 | 鑫磊压缩机股份有限公司 | Axial clearance adjusting method for magnetic suspension motor |
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| SU1631514A1 (en) * | 1988-03-21 | 1991-02-28 | Специальное Конструкторское Бюро Экспериментального Аэрокосмического Приборостроения | Electromagnetic suspension control system |
| JPH07238897A (en) * | 1994-02-25 | 1995-09-12 | Shimadzu Corp | Turbo-molecular pump |
| JP2001190045A (en) * | 2000-01-05 | 2001-07-10 | Sankyo Seiki Mfg Co Ltd | Magnetically levitated motor |
| JP2006014528A (en) * | 2004-06-28 | 2006-01-12 | Iwaki Co Ltd | Magnetic levitation motor and turbo-pump |
| CN105650117A (en) * | 2016-03-31 | 2016-06-08 | 珠海格力节能环保制冷技术研究中心有限公司 | Magnetic bearing component and compressor |
| CN107959378A (en) * | 2017-12-28 | 2018-04-24 | 南京磁谷科技有限公司 | Separate type thrust magnetic axis bearing structure in a kind of magnetic suspension motor rotor |
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| CN208764133U (en) * | 2018-07-24 | 2019-04-19 | 上海洛克磁业有限公司 | A kind of vertical shaft maglev device |
| CN110594294A (en) * | 2019-08-28 | 2019-12-20 | 中国人民解放军海军工程大学 | Magnetic suspension bearing system with detachable thrust disc |
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| FR2892780B1 (en) * | 2005-10-27 | 2009-07-03 | Mecanique Magnetique Sa Soc D | MAGNETIC SUSPENSION DEVICE WITH SURFACE PROTECTED WINDINGS AND METHOD FOR CONTROLLING THE TEMPERATURE OF THESE WINDINGS |
| CN100559143C (en) * | 2008-03-21 | 2009-11-11 | 北京航空航天大学 | Five-freedom active control magnetic suspension free rolling system |
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| JP6695541B2 (en) * | 2017-02-01 | 2020-05-20 | 株式会社島津製作所 | Magnetic bearing controller and vacuum pump |
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-
2019
- 2019-12-26 CN CN201911370787.XA patent/CN110894855B/en active Active
-
2020
- 2020-02-27 WO PCT/CN2020/076887 patent/WO2021128573A1/en active Application Filing
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| JPH07238897A (en) * | 1994-02-25 | 1995-09-12 | Shimadzu Corp | Turbo-molecular pump |
| JP2001190045A (en) * | 2000-01-05 | 2001-07-10 | Sankyo Seiki Mfg Co Ltd | Magnetically levitated motor |
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| CN208764133U (en) * | 2018-07-24 | 2019-04-19 | 上海洛克磁业有限公司 | A kind of vertical shaft maglev device |
| CN110594294A (en) * | 2019-08-28 | 2019-12-20 | 中国人民解放军海军工程大学 | Magnetic suspension bearing system with detachable thrust disc |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN110894855A (en) | 2020-03-20 |
| WO2021128573A1 (en) | 2021-07-01 |
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