CN204344798U - Squeeze film damper with floating magnetic ring - Google Patents
Squeeze film damper with floating magnetic ring Download PDFInfo
- Publication number
- CN204344798U CN204344798U CN201420822713.1U CN201420822713U CN204344798U CN 204344798 U CN204344798 U CN 204344798U CN 201420822713 U CN201420822713 U CN 201420822713U CN 204344798 U CN204344798 U CN 204344798U
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- CN
- China
- Prior art keywords
- magnet ring
- magnetic ring
- ring
- floats
- floating
- 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.)
- Withdrawn - After Issue
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- 238000007667 floating Methods 0.000 title claims abstract description 35
- 238000013016 damping Methods 0.000 claims abstract description 17
- 239000000463 material Substances 0.000 claims description 9
- 229910000838 Al alloy Inorganic materials 0.000 claims description 6
- 239000010935 stainless steel Substances 0.000 claims description 6
- 239000000956 alloy Substances 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 238000004663 powder metallurgy Methods 0.000 claims description 3
- 229910001256 stainless steel alloy Inorganic materials 0.000 claims description 2
- 230000008859 change Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910001172 neodymium magnet Inorganic materials 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 210000002700 urine Anatomy 0.000 description 1
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- Support Of The Bearing (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The utility model discloses a squeeze film damper of magnetic ring floats in area, it includes: a housing; the oil film journal comprises a fixed magnetic ring and a fixed support capable of swinging in the radial direction, the fixed magnetic ring is fixedly arranged on the outer wall of the fixed support, the fixed support is internally used for rotatably supporting the rotating shaft, and one end of the fixed support is fixed through an elastic shaft arranged on the fixed support; the floating magnetic ring is arranged on the periphery of the fixed magnetic ring, the floating magnetic ring and the fixed magnetic ring are both magnetized in the radial direction, the opposite surfaces of the floating magnetic ring and the fixed magnetic ring are of same-polarity magnetic poles, the floating magnetic ring is positioned in the shell, and squeeze oil films are respectively arranged between the outer ring of the floating magnetic ring and the shell and between the inner ring of the floating magnetic ring and the fixed magnetic ring. The utility model discloses can effectively improve the phenomenon of the strong nonlinear characteristic that rigidity and damping demonstrate along with the increase of rotor eccentricity, make it work under more being fit for the high-speed operating mode.
Description
Technical field
The utility model relates to a kind of squeeze film damper with floating magnet ring, be a kind of device carrying out radial support and vibration damping for key components and parts rotor in high-speed rotating machine (as centrifuge, turbo machine, accumulated energy flywheel etc.), belong to equipment manufacturing technology field.
Background technique
At present, can stablize in order to ensure axle system, operate efficiently, in the various high-speed rotating machines such as centrifuge, turbo machine, accumulated energy flywheel, normal needs introduces damper device in axle system.
The rigidity that common squeeze film damper can provide and damping can be expressed as (holding approximation theory for minor axis): stiffness coefficient, damping constant, from formula, the rigidity of damper and the size of damping constant, along with the increase of rotor eccentricity rate ε (throw of eccentric), and presenting very strong nonlinear characteristics, this strong nonlinearity characteristic can cause bistable state response and the problem such as low frequency precession of rotor-support-foundation system, thus rotor-damper system is damaged.
Therefore, a kind of damper that can improve the strong nonlinearity spy that damping and stiffness coefficient change with rotor eccentricity rate will have important industrial application value.
Summary of the invention
Technical problem to be solved in the utility model is the defect overcoming prior art, a kind of squeeze film damper with floating magnet ring is provided, it effectively can improve the phenomenon of the strong nonlinearity characteristic that rigidity and damping present along with the increase of rotor eccentricity rate, works under making it to be more suitable for high-speed working condition.
The utility model solves the problems of the technologies described above the technological scheme taked: a kind of squeeze film damper with floating magnet ring, and it comprises:
Housing;
Oil film axle journal, described oil film axle journal comprises fixing magnet ring and the swingable fixed support of radial direction, fixing magnet ring is fixedly mounted on support bracket fastened outer wall, and for rotatably supporting rotor axle system in described fixed support, and support bracket fastened one end is fixed by the elastic axis that it is equipped with;
Float magnet ring, described floating magnet ring is arranged on the periphery of fixing magnet ring, and float magnet ring and the equal radial magnetizing of fixing magnet ring, the one side that the magnet ring that floats is relative with fixing magnet ring is like pole, described floating magnet ring is positioned at housing, and is respectively arranged with squeeze film between the outer ring of the magnet ring that floats and housing and between the inner ring of floating magnet ring and fixing magnet ring.
Further in order to effectively reduce the frictional force brought when floating magnet ring moves, the bottom of described housing is provided with circular groove, and is provided with multiple spherical ball in circular groove, and described floating magnet ring is placed in multiple spherical ball.
Further, described housing is made up of non-magnet material.
Further, described housing is made up of aluminum alloy material.
Further, described fixed support is made up of stainless steel or aluminum alloy material.
Further, described elastic axis is made up of stainless steel material.
Further, elastic damping part is provided with between the outer ring of housing and floating magnet ring.
Further, described elastic damping part is wire netting or powder metallurgy ring.
After have employed technique scheme, during work, when rotor axial system vibrates, rotor axial system drives and constitutes the swing of oil film axle journal by the fixing magnet ring of fixed support and upper installation thereof, according to the principle of two like magnetic poles repel each other, floating magnet ring just moves under the repulsion effect of oil film axle journal upper magnetic ring, and the oil film rigidity that such oil film axle journal squeeze film produces and damping stool and urine are the functions of the difference of oil film axle journal and floating magnet ring throw of eccentric, therefore effectively can improve the damping of damper and the strong nonlinearity feature of rigidity.
Accompanying drawing explanation
Fig. 1 is that band of the present utility model floats the structural representation of squeeze film damper of magnet ring.
Embodiment
In order to make content of the present utility model more easily be clearly understood, below according to specific embodiment also by reference to the accompanying drawings, the utility model is described in further detail.
As shown in Figure 1, a kind of squeeze film damper with floating magnet ring, it comprises:
Housing 9;
Oil film axle journal, described oil film axle journal comprises fixing magnet ring 7 and the swingable fixed support 5 of radial direction, fixing magnet ring 7 is fixedly mounted on the outer wall of fixed support 5, for by rolling bearing 3 rotatably supporting rotor axle system 4 in described fixed support 5, and one end of fixed support 5 is fixed by the elastic axis 2 that it is equipped with; Fixed support 5 can only swing and can not rotate.
Float magnet ring 6, described floating magnet ring 6 is arranged on the periphery of fixing magnet ring 7, and float magnet ring 6 and fixing magnet ring 7 all radial magnetizings, the one side that the magnet ring 6 that floats is relative with fixing magnet ring 7 is like pole, described floating magnet ring 6 is positioned at housing 9, and is respectively arranged with squeeze film 1 between the outer ring of the magnet ring 6 that floats and housing 9 and between the inner ring of floating magnet ring 6 and fixing magnet ring 7.
As shown in Figure 1, the bottom of housing 9 is provided with circular groove, and is provided with multiple spherical ball 8 in circular groove, and the magnet ring 6 that floats is placed in multiple spherical ball 8.The setting of circular groove is for material prevents spherical ball 8 from moving radially.
Housing 9 is made up of non-magnet material, such as aluminum alloy (trade mark is 2A13), but is not limited thereto.
Fixed support 5 is made up, when being not limited thereto of stainless steel (trade mark is 1Cr18Ni9Ti) or aluminum alloy (trade mark is 2A13) material.
Elastic axis 2 is made up of stainless steel material, and the trade mark is 1Cr18Ni9Ti, but is not limited thereto.
The material of fixing magnet ring 7, the parts such as magnet ring 6 that float is Nd-Fe-B, trade mark N40, and adopt radial magnetizing, this part can be customized in specialized factory; Spherical ball 8, rolling bearing 3 all can be bought in market.
Also the elastic damping part such as wire netting, powder metallurgy ring can be put between housing 9 and floating magnet ring 6.
Working principle of the present utility model is as follows:
During work, rotor axial system 4 vibrates and drives oil film axle journal to swing, the fixing magnet ring 7 that it is installed, a repulsion can be produced between the floating magnet ring 6 identical with polarity, floating magnet ring 6 is forced to move, extruding is by oil film axle journal, floating magnet ring 6 and housing 9 constitute two squeeze films 1 jointly, produce oil film rigidity thus to come supporting axle system and normally work, the oil-film damping that extruding produces carrys out the unnecessary energy of dissipative system, the oil film rigidity produced due to oil film axle journal squeeze film and damping size are the functions of the difference of oil film axle journal and floating magnet ring 6 throw of eccentric, floating magnet ring 6 in device to move, slow down the change of squeeze film gap, thus the rigidity making this device provide and damping constant change strong nonlinearity feature with rotor eccentricity rate and are improved, in addition, in device, permanent-magnetic clamp only swings and does not rotate, and avoids hoop action of pulling stress that permanent-magnetic clamp brings by centrifugal force when high speed rotating and is damaged, working under making it to be more suitable for high-speed working condition.
Above-described specific embodiment; technical problem, technological scheme and beneficial effect that the utility model solves are further described; be understood that; the foregoing is only specific embodiment of the utility model; be not limited to the utility model; all within spirit of the present utility model and principle, any amendment made, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (8)
1. a squeeze film damper for the floating magnet ring of band, it is characterized in that, it comprises:
Housing (9);
Oil film axle journal, described oil film axle journal comprises fixing magnet ring (7) and the swingable fixed support (5) of radial direction, fixing magnet ring (7) is fixedly mounted on the outer wall of fixed support (5), for rotatably supporting rotor axle system (4) in described fixed support (5), and one end of fixed support (5) is fixed by the elastic axis (2) that it is equipped with;
Float magnet ring (6), described floating magnet ring (6) is arranged on the periphery of fixing magnet ring (7), and float magnet ring (6) and fixing magnet ring (7) all radial magnetizings, the one side that the magnet ring (6) that floats is relative with fixing magnet ring (7) is like pole, described floating magnet ring (6) is positioned at housing (9), and is respectively arranged with squeeze film (1) between the outer ring of the magnet ring (6) that floats and housing (9) and between the inner ring of floating magnet ring (6) and fixing magnet ring (7).
2. band according to claim 1 floats the squeeze film damper of magnet ring, it is characterized in that: the bottom of described housing (9) is provided with circular groove, and be provided with multiple spherical ball (8) in circular groove, described floating magnet ring (6) is placed in multiple spherical ball (8).
3. band according to claim 1 and 2 floats the squeeze film damper of magnet ring, it is characterized in that: described housing (9) is made up of non-magnet material.
4. band according to claim 3 floats the squeeze film damper of magnet ring, it is characterized in that: described housing (9) is made up of aluminum alloy material.
5. band according to claim 1 and 2 floats the squeeze film damper of magnet ring, it is characterized in that: described fixed support (5) is made up of stainless steel or aluminum alloy material.
6. band according to claim 1 and 2 floats the squeeze film damper of magnet ring, it is characterized in that: described elastic axis (2) is made up of stainless steel material.
7. band according to claim 1 and 2 floats the squeeze film damper of magnet ring, it is characterized in that: be provided with elastic damping part between described housing (9) and the outer ring of floating magnet ring (6).
8. band according to claim 7 floats the squeeze film damper of magnet ring, it is characterized in that: described elastic damping part is wire netting or powder metallurgy ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420822713.1U CN204344798U (en) | 2014-12-23 | 2014-12-23 | Squeeze film damper with floating magnetic ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420822713.1U CN204344798U (en) | 2014-12-23 | 2014-12-23 | Squeeze film damper with floating magnetic ring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204344798U true CN204344798U (en) | 2015-05-20 |
Family
ID=53228069
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420822713.1U Withdrawn - After Issue CN204344798U (en) | 2014-12-23 | 2014-12-23 | Squeeze film damper with floating magnetic ring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204344798U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104455200A (en) * | 2014-12-23 | 2015-03-25 | 江苏理工学院 | Squeeze film damper with floating magnetic ring |
| CN108443325A (en) * | 2018-04-02 | 2018-08-24 | 江苏理工学院 | Impact damper for high-speed rotating machine |
| CN110131352A (en) * | 2019-05-16 | 2019-08-16 | 兰州理工大学 | A kind of active-passive integratedization vibrating controller based on piezoelectric actuating |
-
2014
- 2014-12-23 CN CN201420822713.1U patent/CN204344798U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104455200A (en) * | 2014-12-23 | 2015-03-25 | 江苏理工学院 | Squeeze film damper with floating magnetic ring |
| CN108443325A (en) * | 2018-04-02 | 2018-08-24 | 江苏理工学院 | Impact damper for high-speed rotating machine |
| CN110131352A (en) * | 2019-05-16 | 2019-08-16 | 兰州理工大学 | A kind of active-passive integratedization vibrating controller based on piezoelectric actuating |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150520 Effective date of abandoning: 20160914 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20150520 Effective date of abandoning: 20160914 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |