CN107387560A - A kind of not uniform thickness thrust magnetic axis bearing structure - Google Patents
A kind of not uniform thickness thrust magnetic axis bearing structure Download PDFInfo
- Publication number
- CN107387560A CN107387560A CN201710755350.2A CN201710755350A CN107387560A CN 107387560 A CN107387560 A CN 107387560A CN 201710755350 A CN201710755350 A CN 201710755350A CN 107387560 A CN107387560 A CN 107387560A
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- CN
- China
- Prior art keywords
- iron core
- thrust
- spacer ring
- thrust magnetic
- uniform thickness
- 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.)
- Pending
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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
- F16C32/047—Details of housings; Mounting of active 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
- 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
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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 discloses a kind of not uniform thickness thrust magnetic axis bearing structure, including thrust magnetic bearing iron core and coil, the coil is located on thrust magnetic bearing iron core and forms electromagnet unit, also include thrust disc and spacer ring body, the two coaxial hearts of electromagnet unit are sheathed on rotor, and formed with running clearance between electromagnet unit and rotor, spacer ring body is located between two electromagnet units and separates two electromagnet to form thrust disc installation gap, thrust disc is fixed on rotor, and the circumferential wall of thrust disc is stretched in thrust disc installation gap；The thickness of spacer ring body is less than the thickness of thrust disc installation gap axial direction.The lamination of thrust magnetic bearing is made into not uniform thickness structure, the thickness of spacer ring is reduced, makes full use of space.
Description
Technical field：
The present invention relates to a kind of not uniform thickness thrust magnetic axis bearing structure.
Background technology：
Magnetic bearing is rotor is in the bearing of suspended state using controlled magnetic field.Because the rotor in magnetic bearing is in outstanding
Floating state, is not physically contacted with retaining element, thus conventional scroll bearing can be applied to can not be high-revolving turn of load
Son.
But the magnetic bearing in high-speed rotation mechanically is applied also to have some defects and problem：
1st, the volume ratio rolling bearing of magnetic bearing is big；Because magnetic bearing is to make rotor suspension by the magnetic attraction of electromagnet
, and the intensity of electromagnetic attraction is far below the yield strength of steel, therefore radial direction carrying of the magnetic bearing on identical axle journal area
Power is more much lower than rolling bearing.Simultaneously because magnetic bearing itself is complicated, it is necessary to cored, coil and some detectors
Part, so the external diameter of magnetic bearing and (axial direction) width dimensions are more much greater than the rolling bearing of same size.
2nd, the vibration problem of high speed rotor than more serious, it is necessary to compression rotor length；The working speed of high speed rotor is often
All close to even more than first critical speed, therefore vibration problem is generally all than more serious.For stiff shaft, on axle
Under the premise of part quality is unalterable, increase diameter, to shorten axial length be to improve the rigidity of axle, so as to improving first critical speed
Usual way.But because the axial dimension of magnetic bearing is bigger than the rolling bearing of same size, thus the length of axle can be caused
Degree increase, so as to have a strong impact on the highest working speed of rotor.
Existing uniform thickness thrust magnetic bearing is as shown in figure 1, including thrust magnetic bearing iron core 1, the coil in iron core
2nd, spacer ring body 4 made of the thrust disc 3 and NULL on rotor forms.It is now assumed that the coil of the thrust magnetic bearing
It is entwined by 5 × 20=100 circle wires.Fig. 1 this it appears that：Because thrust disc needs certain thickness, and spacer ring
Inevitable specific thrust disk is thick, therefore spacer ring occupies very big one piece of axial length.
The content of the invention：
The present invention is to provide a kind of not uniform thickness thrust magnetic bearing knot to solve the above-mentioned problems of the prior art
Structure.
The technical solution adopted in the present invention has：A kind of not uniform thickness thrust magnetic axis bearing structure, including thrust magnetic bearing iron core
And coil, the coil are located on thrust magnetic bearing iron core and form electromagnet unit, in addition to thrust disc and spacer ring body, two
The coaxial heart of electromagnet unit is sheathed on rotor, and formed with running clearance, spacer ring between electromagnet unit and rotor
Body is located between two electromagnet units and separates two electromagnet to form thrust disc installation gap, and thrust disc is fixed on rotor,
And the circumferential wall of thrust disc is stretched in thrust disc installation gap；The thickness of spacer ring body is less than thrust disc installation gap axial direction
Thickness.
Further, the thrust magnetic bearing iron core includes iron core backboard and iron core web, the center of circle of the iron core backboard
Place is provided with axis hole, circular mounting groove is provided with iron core backboard, circular mounting groove is coaxially disposed with axis hole, the circular mounting groove
Outer wall be provided with positioning table terrace, the copper cash of coil is set around in circular mounting groove, and iron core web is fixed on iron by screw
On core backboard, and the outer circle wall of iron core web is positioned on positioning table terrace.
Further, the circle centre position of the iron core web upper surface is provided with stepped hole, on the lower surface of iron core web
Circumferencial direction is provided with limiting stand terrace；Formed and pushed away between the step surface of the stepped hole on iron core web in two electromagnet units
Power disk installs gap.
Further, the spacer ring body is made of stainless steel or aluminum.
The present invention has the advantages that：
1) lamination of thrust magnetic bearing is made into not uniform thickness structure, reduces the thickness of spacer ring, make full use of space；
2) rotor axial length can be shortened by the thrust magnetic axis bearing structure according to the design needs, improve the allowable of rotor
Working speed, magnetic bearing external diameter can also be reduced, or shorten length simultaneously and reduce external diameter.
3) while magnetic bearing assembly volume is reduced, the area of coil turn and thrust disc does not change, and does not interfere with
Magnetic bearing performance.
Brief description of the drawings：
Fig. 1 is this uniform thickness thrust magnetic bearing structure chart in the prior art.
Fig. 2 to Fig. 4 is structure chart of the present invention.
Fig. 5 is the structure chart of thrust magnetic bearing iron core in the present invention.
Fig. 6 is the sectional view of thrust magnetic bearing iron core in the present invention.
Fig. 7 is the structure chart of iron core backboard in the present invention.
Fig. 8 is structure chart of the coil of the present invention in iron core backboard.
Fig. 9 is another structure chart of the present invention.
Embodiment：
The present invention is further illustrated below in conjunction with the accompanying drawings.
As shown in Figure 2 and Figure 9, the present invention discloses a kind of not uniform thickness thrust magnetic axis bearing structure, including thrust magnetic bearing iron core 1
With coil 2, coil 2 is located on thrust magnetic bearing iron core 1 and forms electromagnet unit, in addition to thrust disc 3 and spacer ring body 4, and two
The coaxial heart of electromagnet unit is sheathed on rotor 400, and formed with running clearance 800 between electromagnet unit and rotor, every
Circle body 4 is located between two electromagnet units and separates two electromagnet to form thrust disc installation gap 110, and thrust disc 3 is fixed on
On rotor 400, and the circumferential wall of thrust disc 3 is stretched in thrust disc installation gap 110.
The thickness of spacer ring body 4 is less than the thickness of the thrust disc installation axial direction of gap 110.
Thrust magnetic bearing iron core 1 in the present invention includes iron core backboard 11 and iron core web 12, in the circle of iron core backboard 11
Axis hole 110 is provided with the heart, circular mounting groove 111 is provided with iron core backboard 11, circular mounting groove 111 is coaxially set with axis hole 110
Put.The outer wall of circular mounting groove 111 is provided with positioning table terrace 112, and the copper cash of coil 2 is set around in circular mounting groove 111, iron
Core web 12 is fixed on iron core backboard 11 by screw, and the outer circle wall of iron core web 12 is positioned at positioning table terrace 112
On.
The circle centre position of the upper surface of iron core web 12 is provided with stepped hole 120, on the iron core web 12 in two electromagnet units
Thrust disc installation gap 110 is formed between the step surface of stepped hole 120.On circumferencial direction on the lower surface of iron core web 12
Provided with limiting stand terrace 121, after iron core web 12 is fixedly connected with iron core backboard 11, the limiting stand terrace 121 of iron core web 12
Coil 2 is fixed jointly with the outside wall surface of circular mounting groove 111.
Spacer ring body 4 in the present invention is made of non-magnet material, such as stainless steel or aluminium.
Thrust magnetic bearing iron core 1 in the present invention makes the shape of not uniform thickness, i.e. the thickness of spacer ring body 4 is pacified less than thrust disc
The thickness of the axial direction of gap 110 is filled, while 5 × 20=100 circle wires are kept, greatly reduces the thickness of spacer ring.Cause
This is not on the premise of thrust magnetic bearing performance is influenceed, the not axial length (solid outline in figure) of uniform thickness thrust magnetic axis bearing assembly
Than uniform thickness magnetic axis bearing assembly (dotted outline in figure) want it is short a lot, so as to shorten the axial length of rotor, improve rotor
Single order rotating speed.
If Fig. 9 is another structure chart of the present invention, it can be seen that in the case where keeping magnetic axis bearing assembly axial length,
While keeping 9 × 11=99 circle wires almost unchanged, uniform thickness magnetic axis bearing assembly can also not be substantially reduced thrust magnetic bearing
Component external diameter.
In addition to above two not uniform thickness thrust magnetic bearing modular construction, can also design after the same method between
Between the two and meanwhile the not uniform thickness thrust magnetic axis bearing assembly that reduces axial length and external diameter.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, some improvement can also be made under the premise without departing from the principles of the invention, and these improvement also should be regarded as the present invention's
Protection domain.
Claims (4)
1. a kind of not uniform thickness thrust magnetic axis bearing structure, including thrust magnetic bearing iron core (1) and coil (2), the coil (2) are located at
On thrust magnetic bearing iron core (1) and form electromagnet unit, it is characterised in that：Also include thrust disc (3) and spacer ring body (4),
The two coaxial hearts of electromagnet unit are sheathed on rotor, and formed with running clearance between electromagnet unit and rotor
(800), spacer ring body (4) is located between two electromagnet units and separates to form thrust disc installation gap (110) by two electromagnet, pushes away
Power disk (3) is fixed on rotor, and the circumferential wall of thrust disc (3) is stretched in thrust disc installation gap (110), the spacer ring body
(4) thickness is less than the thickness of thrust disc installation gap (110) axial direction.
2. not uniform thickness thrust magnetic axis bearing structure as claimed in claim 1, it is characterised in that：The thrust magnetic bearing iron core (1)
Including iron core backboard (11) and iron core web (12), the circle centre position of the iron core backboard (11) is provided with axis hole (110), is carried on the back in iron core
Plate (11) is provided with circular mounting groove (111), and circular mounting groove (111) is coaxially disposed with axis hole (110), the circular mounting groove
(111) outer wall is provided with positioning table terrace (112), and the copper cash of coil (2) is set around in circular mounting groove (111), iron core abdomen
Plate (12) is fixed on iron core backboard (11) by screw, and the outer circle wall of iron core web (12) is positioned at positioning table terrace
(112) on.
3. not uniform thickness thrust magnetic axis bearing structure as claimed in claim 2, it is characterised in that：Iron core web (12) upper surface
Circle centre position be provided with stepped hole (120), be provided with limiting stand terrace on the circumferencial direction on the lower surface of iron core web (12)
(121)；Thrust disc clipping room is formed between the step surface of the stepped hole (120) on iron core web (12) in two electromagnet units
Gap (110).
4. not uniform thickness thrust magnetic axis bearing structure as claimed in claim 2, it is characterised in that：The spacer ring body (4) is using stainless
Steel or aluminum are made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710755350.2A CN107387560A (en) | 2017-08-29 | 2017-08-29 | A kind of not uniform thickness thrust magnetic axis bearing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710755350.2A CN107387560A (en) | 2017-08-29 | 2017-08-29 | A kind of not uniform thickness thrust magnetic axis bearing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107387560A true CN107387560A (en) | 2017-11-24 |
Family
ID=60346395
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710755350.2A Pending CN107387560A (en) | 2017-08-29 | 2017-08-29 | A kind of not uniform thickness thrust magnetic axis bearing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107387560A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0632739U (en) * | 1992-09-29 | 1994-04-28 | 光洋精工株式会社 | Bearing device |
| JPH06147185A (en) * | 1992-11-10 | 1994-05-27 | Seiko Seiki Co Ltd | Magnetic levitation type vacuum pump |
| EP0768467A1 (en) * | 1995-10-11 | 1997-04-16 | Ebara Corporation | Bearing unit |
| JPH116774A (en) * | 1997-04-25 | 1999-01-12 | Daikin Ind Ltd | Device and method for detecting temperature of rotor |
| JP2000257586A (en) * | 1999-03-08 | 2000-09-19 | Koyo Seiko Co Ltd | Turbo molecular pump |
| JP2000283088A (en) * | 1999-03-30 | 2000-10-10 | Shimadzu Corp | Turbo-molecule pump |
| US6184640B1 (en) * | 1998-04-28 | 2001-02-06 | Seiko Seiki Kabushiki Kaisha | DC brushless motor, magnetic bearing device and turbomolecular pump device |
| JP2001099154A (en) * | 1999-09-30 | 2001-04-10 | Shimadzu Corp | Control device for magnetic levitation device |
| US20020155013A1 (en) * | 1999-03-29 | 2002-10-24 | Seiko Instruments Inc. | Magnetic bearing protective device and turbomolecular pump |
| CN207470616U (en) * | 2017-08-29 | 2018-06-08 | 南京磁谷科技有限公司 | A kind of not uniform thickness thrust magnetic axis bearing structure |
-
2017
- 2017-08-29 CN CN201710755350.2A patent/CN107387560A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0632739U (en) * | 1992-09-29 | 1994-04-28 | 光洋精工株式会社 | Bearing device |
| JPH06147185A (en) * | 1992-11-10 | 1994-05-27 | Seiko Seiki Co Ltd | Magnetic levitation type vacuum pump |
| EP0768467A1 (en) * | 1995-10-11 | 1997-04-16 | Ebara Corporation | Bearing unit |
| JPH116774A (en) * | 1997-04-25 | 1999-01-12 | Daikin Ind Ltd | Device and method for detecting temperature of rotor |
| US6184640B1 (en) * | 1998-04-28 | 2001-02-06 | Seiko Seiki Kabushiki Kaisha | DC brushless motor, magnetic bearing device and turbomolecular pump device |
| JP2000257586A (en) * | 1999-03-08 | 2000-09-19 | Koyo Seiko Co Ltd | Turbo molecular pump |
| US20020155013A1 (en) * | 1999-03-29 | 2002-10-24 | Seiko Instruments Inc. | Magnetic bearing protective device and turbomolecular pump |
| JP2000283088A (en) * | 1999-03-30 | 2000-10-10 | Shimadzu Corp | Turbo-molecule pump |
| JP2001099154A (en) * | 1999-09-30 | 2001-04-10 | Shimadzu Corp | Control device for magnetic levitation device |
| CN207470616U (en) * | 2017-08-29 | 2018-06-08 | 南京磁谷科技有限公司 | A kind of not uniform thickness thrust magnetic axis bearing structure |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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| PB01 | Publication | ||
| PB01 | Publication | ||
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| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20171124 |