CN104455143B - Magnetic damper with floating ring - Google Patents
Magnetic damper with floating ring Download PDFInfo
- Publication number
- CN104455143B CN104455143B CN201410807372.5A CN201410807372A CN104455143B CN 104455143 B CN104455143 B CN 104455143B CN 201410807372 A CN201410807372 A CN 201410807372A CN 104455143 B CN104455143 B CN 104455143B
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- China
- Prior art keywords
- ring
- floating
- magnetic
- internal
- magnet
- Prior art date
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- 238000007667 floating Methods 0.000 title claims abstract description 95
- 238000013016 damping Methods 0.000 claims abstract description 15
- 239000000463 material Substances 0.000 claims description 12
- 229910000838 Al alloy Inorganic materials 0.000 claims description 6
- 239000000956 alloy Substances 0.000 claims description 4
- 229910001369 Brass Inorganic materials 0.000 claims description 3
- 239000010951 brass Substances 0.000 claims description 3
- 238000004663 powder metallurgy Methods 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 229910000851 Alloy steel Inorganic materials 0.000 claims description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims 1
- 229910052751 metal Inorganic materials 0.000 claims 1
- 239000002184 metal Substances 0.000 claims 1
- 238000002955 isolation Methods 0.000 abstract 2
- 230000008859 change Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000006467 substitution reaction 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
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F6/00—Magnetic springs; Fluid magnetic springs, i.e. magnetic spring combined with a fluid
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The invention discloses a magnetic damper with a floating ring, which comprises: a housing; the inner shaft neck comprises an inner ring and a fixing support capable of swinging in the radial direction, the inner ring is fixedly arranged on the outer wall of the fixing support, the fixing support is internally used for rotatably supporting a rotor shaft system, one end of the fixing support is fixed through an elastic shaft arranged on the fixing support, the inner ring is provided with a plurality of inner conductive and magnetic insulating rings and a plurality of inner magnetic rings, and the inner conductive and magnetic insulating rings and the inner magnetic rings are alternately arranged in parallel in the axial direction of the inner ring; the floating ring and the inner ring are coaxially arranged, the floating ring is arranged on the periphery of the inner ring and is provided with a plurality of floating conductive magnetic isolation rings and a plurality of floating magnetic rings, and the floating conductive magnetic isolation rings and the floating magnetic rings are also arranged in parallel and alternately in the axial direction of the floating ring. The invention can effectively improve the phenomenon of strong nonlinear characteristics of rigidity and damping presented along with the increase of the eccentricity of the rotor, so that the rotor is more suitable for working under a high-speed working condition.
Description
Technical field
The present invention relates to a kind of magnetic damper with floating ring, it is a kind of high-speed rotating machine that is directed to (as centrifuge, turbine
Machine, accumulated energy flywheel etc.) in key components and partss rotor carry out the device of radial support and vibration damping, belong to equipment manufacturing technology field.
Background technology
At present, in order to ensure shafting can stable, efficiently operate, in the various high speed such as centrifuge, turbine, accumulated energy flywheel
In rotating machinery, often need to introduce damper device in shafting.
The rigidity that common squeeze film damper can be provided by and damping are represented by that (holding approximation theory with short axle is
Example): stiffness coefficient, damped coefficient, from formula, the rigidity of antivibrator and the size of damped coefficient, with rotor eccentricity rate ε
The increase of (or eccentric throw), and present very strong nonlinear characteristic, this strong nonlinearity characteristic can cause the double of rotor-support-foundation system
The problems such as steady-state response and low frequency precession, so that rotor damper system is damaged.
Therefore, a kind of can improve damping with stiffness coefficient with rotor eccentricity rate change strong nonlinearity spy antivibrator will have
Important industrial application value.
Content of the invention
The technical problem to be solved is the defect overcoming prior art, provides a kind of magnetic damping with floating ring
Device, it can be effectively improved the phenomenon of the strong nonlinearity characteristic that rigidity is presented with the increase of rotor eccentricity rate with damping,
It is allowed to be more suitable for working under high-speed working condition.
The present invention solves above-mentioned technical problem and adopts the technical scheme that: a kind of magnetic damper with floating ring, and it includes:
Housing；
Interior axle journal, described interior axle journal includes internal ring and radially swingable fixed support, and internal ring is fixedly mounted on fixing
On the outer wall of frame, it is used for rotatably supporting rotor axial system in described fixed support, and it is passed through in support bracket fastened one end
On equipped with elastic shaft fix, described internal ring has multiple interior conductive magnet rings and multiple internal magnetic rings absolutely, and interior conductive magnet ring absolutely
It is in be alternately arranged shape side by side in the axial direction of internal ring with internal magnetic ring；
Floating ring, described floating ring and internal ring are co-axially mounted, and floating ring is arranged on the periphery of internal ring, and floating ring has
Multiple float conductive magnet ring and multiple floating magnet rings absolutely, float conductive magnet ring and floating magnet ring absolutely are also in the axial direction of floating ring
It is alternately arranged shape, floating magnet ring and the equal radial magnetizing of internal magnetic ring side by side, the floating magnet ring one side relative with internal magnetic ring is same sex magnetic
Pole, described floating ring is movably arranged in housing；In described floating ring and internal ring, at least one floating magnet ring with interior
The diametrically opposite setting of magnet ring, at least one floating magnet ring and the interior conductive diametrically opposite setting of magnet ring absolutely, and/or at least one
Conduction of floating magnet ring absolutely and the diametrically opposite setting of internal magnetic ring.
Further for can effectively reduce the frictional force brought when floating ring moves, the bottom of described housing is provided with
Multiple spherical ball are installed in cannelure, and cannelure, described floating ring is placed in multiple spherical ball.
Further, described floating ring has two float conductive magnet ring and two floating magnet rings absolutely, and described internal ring has
There is in three internal magnetic rings and two a conductive magnet ring absolutely, the height of the floating magnet ring of the top is equal to the internal magnetic ring of the top and interior leads
The height sum of electricity magnet ring absolutely.
Further for the benefit increasing current vortex to increase damping well, housing is by conductive non-magnetic material
Material is made.
Further, housing is made up of aluminum alloy materials.
Further, fixed support is made up of rustless steel or aluminum alloy materials.
Further, elastic shaft is made up of stainless steel material.
Further, it is provided with elastic damping part between the outer ring of housing and floating magnet ring.
Further, elastic damping part is wire netting or powder metallurgy ring.
Further, conduction of floating magnet ring absolutely and/or interior conductive magnet ring absolutely are made up of brass material.
After employing technique scheme, during work, by fixed support and the radial magnetizing installed thereon internal magnetic ring and
Interior conductive magnet ring absolutely constitutes the interior axle journal that can only swing and can not rotate, and when rotor axial system vibrates, in drive, axle journal swings,
The principle repelled each other according to the same sex, floating ring (being made up of the floating magnet ring and the conductive magnet ring absolutely that floats of radial magnetizing) is just in interior axle journal
The repulsion effect of upper internal magnetic ring is lower to move so that the magnetic induction loudness of floating ring arranged on left and right sides has greatly changed, and floating is led
Electricity magnet ring, interior conductive magnet ring absolutely absolutely, even conductive housing will produce the current vortex energy unnecessary to consume rotor axial system,
Thus form an eddy current retarder；On the other hand, floating magnet ring also can give interior one retroaction repulsion of axle journal, this power with all
The elastic shaft of cloth provides radial support rigidity necessary to normal operation for rotor axial system jointly, this makes it possible to be effectively improved just
The phenomenon of the strong nonlinearity characteristic that degree is presented with the increase of rotor eccentricity rate with damping, is allowed to be more suitable under high-speed working condition
Work.
Brief description
Fig. 1 is the structural representation of the magnetic damper with floating ring of the present invention.
Specific embodiment
In order that present disclosure is easier to be clearly understood, below according to specific embodiment and combine accompanying drawing, right
The present invention is described in further detail.
As shown in figure 1, a kind of magnetic damper with floating ring, it includes:
Housing 7；
Interior axle journal, interior axle journal includes internal ring and radially swingable fixed support 8, and internal ring is fixedly mounted on fixed support 8
Outer wall on, for rotor axial system 3, and the one of fixed support 8 are rotatably supported by rolling bearing 2 in fixed support 8
End by thereon equipped with elastic shaft 4 fixing, internal ring has multiple interior conductive magnet rings 10 and multiple internal magnetic rings 1 absolutely, and interior leads
Electricity magnet ring 10 absolutely and internal magnetic ring 1 are in be alternately arranged shape side by side in the axial direction of internal ring；
Floating ring, floating ring and internal ring are co-axially mounted, and floating ring is arranged on the periphery of internal ring, and floating ring has multiple
Float conductive magnet ring 6 and multiple floating magnet ring 5 absolutely, and float conductive magnet ring 6 and floating magnet ring 5 absolutely are also in the axial direction of floating ring
It is alternately arranged shape, floating magnet ring 5 and the equal radial magnetizing of internal magnetic ring 1 side by side, floating magnet ring 5 one side relative with internal magnetic ring 1 is same
Property magnetic pole, described floating ring is movably arranged in housing 7；In described floating ring and internal ring, at least one floating magnetic
Ring 5 and the diametrically opposite setting of internal magnetic ring 1, at least one floating magnet ring 5 and the interior conductive diametrically opposite setting of magnet ring 10 absolutely,
And/or at least one float conductive magnet ring 6 absolutely and the diametrically opposite setting of internal magnetic ring 1.
As shown in figure 1, the bottom of housing 7 is provided with cannelure, and multiple spherical ball 9 are installed in cannelure, float
Rotating ring is placed in multiple spherical ball 9.
Floating ring has two float conductive magnet ring 6 and two floating magnet rings 5 absolutely, and internal ring has three internal magnetic rings 1 and two
Individual interior conductive magnet ring 10 absolutely, the height of the floating magnet ring 5 of the top is equal to the internal magnetic ring 1 of the top and interior conductive magnet ring 10 absolutely
Height sum.
Housing 7 is made up of conductive non-magnet material, such as, aluminium alloy (trade mark be 2a13), but not limited to this it is also possible to
Made using non-conductive non-magnet material, to reduce magneto damped coefficient.
Fixed support 5 is made up of rustless steel (trade mark is by 1cr18ni9ti) or aluminium alloy (trade mark is by 2a13) material, when not
It is limited to this.
Elastic shaft 4 is made up of stainless steel material, and the trade mark is 1cr18ni9ti, but not limited to this.
Flexible damping piece is may also set up between the outer ring of housing 7 and floating magnet ring 5.
Elastic damping part is wire netting or powder metallurgy ring.
Conduction of floating magnet ring 6 absolutely and/or interior conductive magnet ring 10 absolutely are made up of brass material.
The material of the parts such as internal magnetic ring 1, floating magnet ring 5 is nd-fe-b, trade mark n40, using radial magnetizing, this part
Can be customized in specialized factory；Spherical ball 8, rolling bearing 3 all can be bought in market.
The present invention can also increase the quantity of magnet ring and exhausted magnet ring vertically, to improve rigidity and the damping energy of radial support
Power.
The operation principle of the present invention is as follows:
During work, constituted by the internal magnetic ring 1 and interior conductive magnet ring 10 absolutely of fixed support 8 and the radial magnetizing installed thereon
The interior axle journal that can only swing and can not rotate, when rotor axial system 3 vibrates, in drive axle journal swing, according to the same sex repel each other former
Reason, floating ring (being made up of the floating magnet ring 5 and the conductive magnet ring 6 absolutely that floats of radial magnetizing) just the scolding of internal magnetic ring 1 on interior axle journal
Power effect lower mobile so that the magnetic induction loudness of floating ring arranged on left and right sides has greatly changed, the conductive magnet ring 6 absolutely that floats, interior
Conductive magnet ring 10 absolutely, even conductive housing 7 will produce the current vortex energy unnecessary to consume rotor axial system, be consequently formed
One eddy current retarder；On the other hand, floating magnet ring 5 also can give interior one retroaction repulsion of axle journal, this power and uniform bullet
Property axle 4 is common provides radial support rigidity necessary to normal operation for rotor axial system, this makes it possible to be effectively improved rigidity with
Damp the phenomenon of the strong nonlinearity characteristic presenting with the increase of rotor eccentricity rate, be allowed to be more suitable for work under high-speed working condition
Make.
Floating ring, due to moving, slow down the gap change between interior axle journal and floating ring, so that this device
The rigidity providing is improved with rotor eccentricity rate change strong nonlinearity feature with damped coefficient.
Magnet ring only swings and does not rotate, it is to avoid the ring action of pulling stress that magnet ring is brought by centrifugal force in high-speed rotation
And be damaged, it is allowed to be more suitable for working under high-speed working condition.
Particular embodiments described above, to present invention solves the technical problem that, technical scheme and beneficial effect carry out
Further describe, be should be understood that the specific embodiment that the foregoing is only the present invention, be not limited to this
Invention, all any modification, equivalent substitution and improvement within the spirit and principles in the present invention, done etc., should be included in this
Within bright protection domain.
Claims (9)
1. a kind of magnetic damper with floating ring, it includes:
Housing (7)；
Interior axle journal, described interior axle journal includes internal ring and radially swingable fixed support (8), and internal ring is fixedly mounted on fixed support
(8), on outer wall, in described fixed support (8), it is used for rotatably supporting rotor axial system (3), and fixed support (8)
One end pass through thereon equipped with elastic shaft (4) fixing, described internal ring has multiple interior conductive magnet rings (10) and multiple internal magnetic rings absolutely
(1), and interior conductive magnet ring (10) absolutely and internal magnetic ring (1) in the axial direction of internal ring in being alternately arranged shape side by side；
Floating ring, described floating ring and internal ring are co-axially mounted, and floating ring is arranged on the periphery of internal ring, and floating ring has multiple
Conduction of floating magnet ring (6) and multiple floating magnet ring (5) absolutely, conduction of floating magnet ring (6) absolutely and floating magnet ring (5) are in the axle of floating ring
Also it is in be alternately arranged shape side by side upwards, floating magnet ring (5) and the equal radial magnetizing of internal magnetic ring (1), floating magnet ring (5) and internal magnetic ring
(1) relative one side is like pole, and described floating ring is movably arranged in housing (7)；In described floating ring and interior
In ring, at least one floating magnet ring (5) and the diametrically opposite setting of internal magnetic ring (1), at least one floating magnet ring (5) and interior conduction
The diametrically opposite setting of magnet ring (10) absolutely, and/or at least one conductive magnet ring (6) absolutely that floats is diametrically opposite with internal magnetic ring (1)
Setting；
The bottom of described housing (7) is provided with cannelure, and is provided with multiple spherical ball (9) in cannelure, described
Floating ring is placed in multiple spherical ball (9).
2. the magnetic damper with floating ring according to claim 1 it is characterised in that: described floating ring have two float
The exhausted magnet ring of moving conductive (6) and two floating magnet rings (5), described internal ring has conductive magnetic absolutely in three internal magnetic rings (1) and two
Ring (10), the height of the floating magnet ring (5) of the top is equal to the internal magnetic ring (1) of the top and the height of interior conductive magnet ring (10) absolutely
Sum.
3. the magnetic damper with floating ring according to claim 1 and 2 it is characterised in that: described housing (7) is by conductive
Non-magnet material is made.
4. the magnetic damper with floating ring according to claim 3 it is characterised in that: described housing (7) is by aluminium alloy
Material is made.
5. the magnetic damper with floating ring according to claim 1 and 2 it is characterised in that: described fixed support (8) is not by
Rust steel or aluminum alloy materials are made.
6. the magnetic damper with floating ring according to claim 1 and 2 it is characterised in that: described elastic shaft (4) is not by
Rust Steel material is made.
7. the magnetic damper with floating ring according to claim 1 and 2 it is characterised in that: described housing (7) with float
It is provided with elastic damping part between the outer ring of magnet ring (5).
8. the magnetic damper with floating ring according to claim 7 it is characterised in that: described elastic damping part be metal
Net or powder metallurgy ring.
9. the magnetic damper with floating ring according to claim 1 it is characterised in that: the conductive magnet ring absolutely of described floating
And/or interior conductive magnet ring (10) absolutely is made up of brass material (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410807372.5A CN104455143B (en) | 2014-12-23 | 2014-12-23 | Magnetic damper with floating ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410807372.5A CN104455143B (en) | 2014-12-23 | 2014-12-23 | Magnetic damper with floating ring |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104455143A CN104455143A (en) | 2015-03-25 |
| CN104455143B true CN104455143B (en) | 2017-01-25 |
Family
ID=52901699
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410807372.5A Active CN104455143B (en) | 2014-12-23 | 2014-12-23 | Magnetic damper with floating ring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104455143B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111677798A (en) * | 2020-06-29 | 2020-09-18 | 哈尔滨工业大学 | Horizontal two-degree-of-freedom electromagnetic vibration isolation device based on magnetic attraction positive and negative stiffness parallel connection |
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| CN108591256B (en) * | 2018-04-02 | 2019-08-27 | 江苏理工学院 | Permanent-magnet bearing with damping function |
| CN109668717B (en) * | 2018-12-17 | 2020-07-28 | 南京航空航天大学 | Double-layer oil film double-support squeeze oil film damper |
| CN110652955A (en) * | 2019-11-14 | 2020-01-07 | 帕尼多（徐州）信息科技有限公司 | Hand-held type is gap filler glue gun raw material mixing device for home decoration |
| CN111677800A (en) * | 2020-06-29 | 2020-09-18 | 哈尔滨工业大学 | Horizontal two-degree-of-freedom electromagnetic vibration isolation device based on positive and negative rigidity parallel connection |
| CN112178058B (en) * | 2020-10-30 | 2022-09-30 | 江苏理工学院 | Variable-rigidity radial permanent magnet bearing |
| CN112211939A (en) * | 2020-10-30 | 2021-01-12 | 江苏理工学院 | Damping device |
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Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19517630C2 (en) * | 1995-05-13 | 1997-10-09 | Metzeler Gimetall Ag | Active vibration absorber |
| CN2685649Y (en) * | 2003-04-22 | 2005-03-16 | 天津森氏精密仪器有限公司 | A new magnetic damper |
| CN101586625A (en) * | 2008-05-20 | 2009-11-25 | 卓向东 | Magnetic suspension bearing and the main shaft that is got up by suspension |
| CN101662180B (en) * | 2008-08-27 | 2011-07-20 | 何君 | Standard magnetic suspension hybrid bearing-supported rotor and high-speed induction electrical rotating machine |
| CN101696713B (en) * | 2009-10-15 | 2011-06-22 | 山东科技大学 | Radial magnetic bearing of low-power consumption inner rotor of permanent-magnetic up-attracting and down-repelling structure |
| CN102082483B (en) * | 2011-02-16 | 2012-07-25 | 东南大学 | Flywheel energy storing device with permanent magnet bearing and thrust bearing |
| CN204344778U (en) * | 2014-12-23 | 2015-05-20 | 江苏理工学院 | Magnetic damper with floating ring |
-
2014
- 2014-12-23 CN CN201410807372.5A patent/CN104455143B/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111677798A (en) * | 2020-06-29 | 2020-09-18 | 哈尔滨工业大学 | Horizontal two-degree-of-freedom electromagnetic vibration isolation device based on magnetic attraction positive and negative stiffness parallel connection |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104455143A (en) | 2015-03-25 |
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