CN109322918A - A kind of magnetic suspension bearing radial protection structure - Google Patents
A kind of magnetic suspension bearing radial protection structure Download PDFInfo
- Publication number
- CN109322918A CN109322918A CN201811305387.6A CN201811305387A CN109322918A CN 109322918 A CN109322918 A CN 109322918A CN 201811305387 A CN201811305387 A CN 201811305387A CN 109322918 A CN109322918 A CN 109322918A
- Authority
- CN
- China
- Prior art keywords
- silicon carbide
- carbide ceramics
- magnetic suspension
- axle sleeve
- rolling bearing
- 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
Links
- 239000000725 suspension Substances 0.000 title claims abstract description 49
- 239000000919 ceramic Substances 0.000 claims abstract description 45
- 229910010271 silicon carbide Inorganic materials 0.000 claims abstract description 44
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 42
- 238000005096 rolling process Methods 0.000 claims abstract description 38
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims description 6
- 238000009694 cold isostatic pressing Methods 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 2
- 230000008093 supporting effect Effects 0.000 abstract description 10
- 230000006378 damage Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000012913 prioritisation Methods 0.000 description 3
- 238000003672 processing method Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007657 chevron notch test Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N ferric oxide Chemical compound O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- F16C32/0402—Bearings not otherwise provided for using magnetic or electric supporting means combined with other supporting means, e.g. hybrid bearings with both magnetic and fluid supporting means
-
- 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
- F16C32/048—Active magnetic bearings for rotary movement with active support of two degrees of freedom, e.g. radial magnetic bearings
Abstract
The invention discloses a kind of magnetic suspension bearing radial protection structures, include silicon carbide ceramics axle sleeve, rolling bearing and rolling bearing pedestal；The outer ring of rolling bearing and rolling bearing pedestal are connected, and rolling bearing pedestal and magnetic suspension bearing seat are connected；The inner wall of the outer wall of silicon carbide ceramics axle sleeve and rolling bearing inner ring is connected, and has towards centre by both ends that several groove widths are identical and symmetrical helicla flute one by one on the inner wall of silicon carbide ceramics axle sleeve；Silicon carbide ceramics axle sleeve covers outside main shaft and spindle eccentricity setting, and the gap on top is greater than the gap of lower part between the two；The difference of the inner ring of magnetic suspension bearing stator and the radius of its rotor outer ring is greater than the difference of the inner wall of silicon carbide ceramics axle sleeve and the radius of main shaft.The present invention can be generated when operating normally supporting force vertically upward and with the common supporting rotor of radial magnetic bearing, destruction caused by rotor is radially directly hit can effectively be mitigated by causing rotor radially to fall moment in radial magnetic bearing failure.
Description
Technical field
The present invention relates to high-speed rotating machine field more particularly to a kind of magnetic suspension bearing radial protection structures.
Background technique
Compressor, air blower, turbine drying machine, large-scale energy-saving water pump, highly effective energy-saving heat pump, accumulated energy flywheel, gas turbine,
The large high-speeds rotating machinery such as centrifugal Central air-conditioning unit, the extensive application in each department of national economy are related
The core key equipment and highly energy-consuming equipment of industry.
Magnetic suspension bearing is a kind of novel bearing that rotor is contiguously suspended without machinery using electromagnetic force.With tradition
Bearing (rolling bearing with cunning dynamic bearing) is compared, and magnetic suspension bearing and rotor are without Mechanical Contact, long service life, maintenance cost
It is low, it without lubrication and sealing, can be used for for a long time in the particular surroundings such as high/low temperature, it is considered to be the revolution of supporting technology is
The practical active supporting arrangement of currently the only investment.But magnetic suspension bearing distinct disadvantage is smaller than bearing capacity.It changes
Yan Zhi, under same bearing capacity, the volume and weight of magnetic suspension bearing is larger, and rotor weight and size increase, system is caused to move
State property can decline.
When magnetic suspension bearing failure when, rotor fall magnetic suspension bearing and rotor can be caused it is badly damaged.Therefore, in magnetic
In suspension bearing rotor system, rolling bearing usually should be also set and (note: existed between rolling bearing and rotor as protection bearing
Air gap, but the air gap is less than the air gap between magnetic suspension bearing and rotor), to undertake defencive function, avoid rotor and magnetic suspension
The collision of bearing.But when system operates normally, this protection bearing cuts little ice.
Gas bearing is using air film support loading or to reduce the mechanical component to rub.With traditional bearing (rolling bearing and
Cunning dynamic bearing) it compares, gas bearing has that speed is high, precision is high, frictional dissipation is small, high-low temperature resistant and atomic radiation, nothing
Pollution, the features such as service life is long.Gas bearing is divided into hydrodynamic gas-lubricated bearing and hydrostatic gas-lubricated bearing.Hydrodynamic gas-lubricated bearing does not need outer
Aerating source, only fluid dynamic effect under generate supporting effect, have the advantages that structure is simple, but to manufacture processing request compared with
Height, and the stage is being started and stopped, exist with rotor and directly contacts friction.
Helicla flute or chevron-notch (hereinafter referred to as helicla flute) hydrodynamic gas-lubricated bearing are to pass through helicoidal pump using helical groove structure
Effect is sent, the bearing of supporting effect is generated.Helicla flute hydrodynamic gas-lubricated bearing is with its bearing capacity big (especially at high speeds), power consumption
Low, the features such as high stability is good, it is far superior to other kinds of hydrodynamic gas-lubricated bearing, practical middle column occupy the umber one.
Gas bearing common used material has titanium alloy and bearing steel, and common processing method has chemical attack processing method, profiling
Filing, ion sputtering processing method, milling method, abrasive flow machining, high-speed milling etc..
Summary of the invention
The technical problem to be solved by the present invention is to provide a kind of magnetic suspension for defect involved in background technique
Bearing radial protection structure.
The present invention uses following technical scheme to solve above-mentioned technical problem:
A kind of magnetic suspension bearing radial protection structure, the magnetic suspension bearing include magnetic suspension bearing seat and magnetic suspension bearing seat
Connected stator, the coil being wrapped on stator and the rotor for being fixed on main shaft；The magnetic suspension bearing is radially protected
Protection structure includes silicon carbide ceramics axle sleeve, rolling bearing and rolling bearing pedestal；
The outer ring of the rolling bearing and the rolling bearing pedestal are connected, and the rolling bearing pedestal and the magnetic suspension bearing seat are solid
Even；
The outer wall of the silicon carbide ceramics axle sleeve and the inner wall of the rolling bearing inner ring are connected, the inner wall of silicon carbide ceramics axle sleeve
On have towards centre that several groove widths are identical and symmetrical helicla flute one by one by both ends；
The silicon carbide ceramics axle sleeve covers outside the main shaft and spindle eccentricity setting, and silicon carbide ceramics sleeve lining
The distance of top and spindle top is greater than the distance of silicon carbide ceramics sleeve lining bottom and main shaft bottom；
Enabling the difference of the inner radii of magnetic suspension bearing stator and the radius of its rotor outer ring is D, then silicon carbide ceramics axle sleeve is interior
The difference of the radius of wall radius and main shaft is less than D；
Radial dynamic pressure air film is generated between the silicon carbide ceramics sleeve lining and main shaft in main shaft high speed rotation.
As a kind of further prioritization scheme of magnetic suspension bearing radial protection structure of the present invention, the silicon carbide ceramics axis
Set system passes through cold isostatic pressing method straight forming.
As a kind of further prioritization scheme of magnetic suspension bearing radial protection structure of the present invention, the silicon carbide ceramics axis
The inner ring of the outer wall of set and rolling bearing interference fit, and silicon carbide ceramics axle sleeve is equipped with and limits its relative rolling bearing
The positioning shaft shoulder of axial movement.
As a kind of further prioritization scheme of magnetic suspension bearing radial protection structure of the present invention, the silicon carbide ceramics axis
The difference of the radius of the inner wall radius and main shaft of set is D/2.
The invention adopts the above technical scheme compared with prior art, has following technical effect that
First, when system operates normally, it is capable of forming between the inner periphery and main shaft of silicon carbide ceramics axle sleeve radial dynamic
It calms the anger film and the common supporting rotor of radial magnetic bearing；
Second, cause rotor radially to fall moment in radial magnetic bearing failure, which radially falls
Direction is compressed into minimum and generates much larger than the supporting force (radially falling opposite direction) when operating normally, and can effectively mitigate
Rotor destroys caused by radially directly hitting；
Third can be avoided traditional helicla flute hydrodynamic gas-lubricated bearing to manufacture due to using isostatic cool pressing straight forming technique
The higher disadvantage of processing request；
4th, the present invention has radial protection effect more stronger than rolling bearing.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of present invention cooperation magnetic suspension bearing；
Fig. 2 is the structural schematic diagram of silicon carbide ceramics axle sleeve in the present invention；
Fig. 3 is the structural schematic diagram that silicon carbide ceramics axle sleeve and main shaft match in the present invention.
In figure, 1- main shaft, 2- magnetic suspension bearing seat, the stator of 3- magnetic suspension bearing, the coil of 4- magnetic suspension bearing, 5- magnetic
The rotor of suspension bearing, 6- rolling bearing pedestal, 7- rolling bearing, 8- silicon carbide ceramics axle sleeve, 9- positioning shaft shoulder, 10- silicon carbide
The inner wall of Ceramic shaft sleeve.
Specific embodiment
Technical solution of the present invention is described in further detail with reference to the accompanying drawing:
The present invention can be embodied in many different forms, and should not be assumed that be limited to the embodiments described herein.On the contrary, providing
These embodiments are thoroughly and complete to make the disclosure, and will give full expression to the scope of the present invention to those skilled in the art.
In the accompanying drawings, for the sake of clarity it is exaggerated component.
As shown in Figure 1, the magnetic suspension bearing includes magnetic the invention discloses a kind of magnetic suspension bearing radial protection structure
The connected stator of suspension bearing seat and magnetic suspension bearing seat, the coil that is wrapped on stator and for being fixed on main shaft
Rotor；The magnetic suspension bearing radial protection structure includes silicon carbide ceramics axle sleeve, rolling bearing and rolling bearing pedestal.
The outer ring of the rolling bearing and the rolling bearing pedestal are connected, the rolling bearing pedestal and the magnetic suspension bearing
Seat is connected.
As shown in Fig. 2, the outer wall of the silicon carbide ceramics axle sleeve and the inner wall of the rolling bearing inner ring are connected, silicon carbide
Have towards centre by both ends that several groove widths are identical and symmetrical helicla flute one by one on the inner wall of Ceramic shaft sleeve.
As shown in figure 3, the silicon carbide ceramics axle sleeve covers outside the main shaft and spindle eccentricity setting, and it is carbonized
At the top of silicon Ceramic shaft sleeve inner wall and the distance of spindle top is greater than the distance of silicon carbide ceramics sleeve lining bottom and main shaft bottom.
Enabling the difference of the inner radii of magnetic suspension bearing stator and the radius of its rotor outer ring is D, then silicon carbide ceramics axle sleeve
Inner wall radius and main shaft radius difference be D/2.
Radial dynamic pressure air film is generated between the silicon carbide ceramics sleeve lining and main shaft in main shaft high speed rotation.
Silicon carbide ceramics axle sleeve system passes through cold isostatic pressing method straight forming, outer wall and the rolling bearing
Inner ring interference fit, and silicon carbide ceramics axle sleeve be equipped with limit its relative rolling bearing axial movement positioning shaft shoulder.
Since twentieth century, the ratio of combined technological achievement is significantly risen, and new technology is often already present several sections
The combination for learning principle is a kind of trend of up-to-date technology development.
The present invention forms radial dynamic pressure air film using the wide helicla flute of eccentrically mounted silicon carbide ceramics sleeve lining,
When normal operation, which can generate supporting force vertically upward and support jointly with radial magnetic bearing
Rotor；Rotor is caused to fall moment in magnetic suspension bearing failure, which radially falls direction and be compressed into pole
Small and generation is much larger than the supporting force (radially falling opposite direction) when normal operation, can effectively mitigate rotor and radially directly hit
Destruction caused by hitting, therefore this structure has radial protection effect more stronger than rolling bearing.
Those skilled in the art can understand that unless otherwise defined, all terms used herein (including skill
Art term and scientific term) there is meaning identical with the general understanding of those of ordinary skill in fields of the present invention.Also
It should be understood that those terms such as defined in the general dictionary should be understood that have in the context of the prior art
The consistent meaning of meaning will not be explained in an idealized or overly formal meaning and unless defined as here.
Above-described specific embodiment has carried out further the purpose of the present invention, technical scheme and beneficial effects
It is described in detail, it should be understood that being not limited to this hair the foregoing is merely a specific embodiment of the invention
Bright, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should be included in the present invention
Protection scope within.
Claims (4)
1. a kind of magnetic suspension bearing radial protection structure, the magnetic suspension bearing includes magnetic suspension bearing seat and magnetic suspension bearing
The connected stator of seat, the coil being wrapped on stator and the rotor for being fixed on main shaft, which is characterized in that the magnetic
Suspension bearing radial protection structure includes silicon carbide ceramics axle sleeve, rolling bearing and rolling bearing pedestal；
The outer ring of the rolling bearing and the rolling bearing pedestal are connected, and the rolling bearing pedestal and the magnetic suspension bearing seat are solid
Even；
The outer wall of the silicon carbide ceramics axle sleeve and the inner wall of the rolling bearing inner ring are connected, the inner wall of silicon carbide ceramics axle sleeve
On have towards centre that several groove widths are identical and symmetrical helicla flute one by one by both ends；
The silicon carbide ceramics axle sleeve covers outside the main shaft and spindle eccentricity setting, and silicon carbide ceramics sleeve lining
The distance of top and spindle top is greater than the distance of silicon carbide ceramics sleeve lining bottom and main shaft bottom；
Enabling the difference of the inner radii of magnetic suspension bearing stator and the radius of its rotor outer ring is D, then silicon carbide ceramics axle sleeve is interior
The difference of the radius of wall radius and main shaft is less than D；
Radial dynamic pressure air film is generated between the silicon carbide ceramics sleeve lining and main shaft in main shaft high speed rotation.
2. magnetic suspension bearing radial protection structure according to claim 1, which is characterized in that the silicon carbide ceramics axle sleeve
System passes through cold isostatic pressing method straight forming.
3. magnetic suspension bearing radial protection structure according to claim 1, which is characterized in that the silicon carbide ceramics axle sleeve
Outer wall and the rolling bearing inner ring interference fit, and silicon carbide ceramics axle sleeve be equipped with limit its relative rolling bearing axis
To mobile positioning shaft shoulder.
4. magnetic suspension bearing radial protection structure according to claim 1, which is characterized in that the silicon carbide ceramics axle sleeve
Inner wall radius and main shaft radius difference be D/2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811305387.6A CN109322918A (en) | 2018-11-05 | 2018-11-05 | A kind of magnetic suspension bearing radial protection structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811305387.6A CN109322918A (en) | 2018-11-05 | 2018-11-05 | A kind of magnetic suspension bearing radial protection structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109322918A true CN109322918A (en) | 2019-02-12 |
Family
ID=65260824
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811305387.6A Pending CN109322918A (en) | 2018-11-05 | 2018-11-05 | A kind of magnetic suspension bearing radial protection structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109322918A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111734740A (en) * | 2020-05-13 | 2020-10-02 | 山东华东风机有限公司 | Radial magnetic-gas combined bearing device |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4357555A (en) * | 1979-05-08 | 1982-11-02 | U.S. Philips Corporation | Rotary anode X-ray tube |
| US4443043A (en) * | 1981-09-09 | 1984-04-17 | Tokyo Shibaura Denki Kabushiki Kaisha | Electric motor unit |
| US4820950A (en) * | 1987-03-03 | 1989-04-11 | Copal Company Limited | Fluid Bearing |
| US5342825A (en) * | 1993-07-16 | 1994-08-30 | The United States Of America As Represented By The Secretary Of The Air Force | Passive superconducting bearing system |
| JPH08210352A (en) * | 1995-10-09 | 1996-08-20 | Koyo Seiko Co Ltd | Magnetic bearing device |
| JP2001336527A (en) * | 2000-05-26 | 2001-12-07 | Ntn Corp | Static pressure magnetic composite bearing spindle device |
| JP2004278640A (en) * | 2003-03-14 | 2004-10-07 | Shimano Inc | Rotation support structure, and spool support structure for double bearing reel |
| CN102146962A (en) * | 2011-03-30 | 2011-08-10 | 南京磁谷科技有限公司 | Radial protective bearing |
| CN105149621A (en) * | 2015-09-01 | 2015-12-16 | 上海大学 | Electric spindle supported by magnetic suspension and lambdoid-groove dynamic pressure and static pressure gas combined bearings |
| CN209262072U (en) * | 2018-11-05 | 2019-08-16 | 南京航空航天大学 | A kind of magnetic suspension bearing radial protection structure |
-
2018
- 2018-11-05 CN CN201811305387.6A patent/CN109322918A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4357555A (en) * | 1979-05-08 | 1982-11-02 | U.S. Philips Corporation | Rotary anode X-ray tube |
| US4443043A (en) * | 1981-09-09 | 1984-04-17 | Tokyo Shibaura Denki Kabushiki Kaisha | Electric motor unit |
| US4820950A (en) * | 1987-03-03 | 1989-04-11 | Copal Company Limited | Fluid Bearing |
| US5342825A (en) * | 1993-07-16 | 1994-08-30 | The United States Of America As Represented By The Secretary Of The Air Force | Passive superconducting bearing system |
| JPH08210352A (en) * | 1995-10-09 | 1996-08-20 | Koyo Seiko Co Ltd | Magnetic bearing device |
| JP2001336527A (en) * | 2000-05-26 | 2001-12-07 | Ntn Corp | Static pressure magnetic composite bearing spindle device |
| JP2004278640A (en) * | 2003-03-14 | 2004-10-07 | Shimano Inc | Rotation support structure, and spool support structure for double bearing reel |
| CN102146962A (en) * | 2011-03-30 | 2011-08-10 | 南京磁谷科技有限公司 | Radial protective bearing |
| CN105149621A (en) * | 2015-09-01 | 2015-12-16 | 上海大学 | Electric spindle supported by magnetic suspension and lambdoid-groove dynamic pressure and static pressure gas combined bearings |
| CN209262072U (en) * | 2018-11-05 | 2019-08-16 | 南京航空航天大学 | A kind of magnetic suspension bearing radial protection structure |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111734740A (en) * | 2020-05-13 | 2020-10-02 | 山东华东风机有限公司 | Radial magnetic-gas combined bearing device |
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