CN208935161U - Axial magnetic suspension bearing - Google Patents
Axial magnetic suspension bearing Download PDFInfo
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- CN208935161U CN208935161U CN201821632015.XU CN201821632015U CN208935161U CN 208935161 U CN208935161 U CN 208935161U CN 201821632015 U CN201821632015 U CN 201821632015U CN 208935161 U CN208935161 U CN 208935161U
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- iron core
- suspension bearing
- magnetic suspension
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- 239000000725 suspension Substances 0.000 title claims abstract description 51
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 112
- 238000004804 winding Methods 0.000 claims description 14
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- BGPVFRJUHWVFKM-UHFFFAOYSA-N N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] Chemical compound N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] BGPVFRJUHWVFKM-UHFFFAOYSA-N 0.000 description 50
- 230000000694 effects Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 238000005188 flotation Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 2
- 230000005389 magnetism Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000004513 sizing Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
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- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
The utility model provides an axial magnetic suspension bearing. The axial magnetic suspension bearing comprises an axial iron core (1), a control coil (2) and a thrust disc (3), wherein the axial iron core (1) and the thrust disc (3) are arranged oppositely, the control coil (2) is arranged in the axial iron core (1), and the axial magnetic suspension bearing further comprises a repulsive force generation assembly for providing repulsive force for the axial iron core (1) and the thrust disc (3). According to the utility model discloses an axial magnetic suspension bearing can reduce the bearing space and occupy, reduction in production cost.
Description
Technical field
The utility model belongs to technical field of bearings, and in particular to a kind of axial magnetic suspension bearing.
Background technique
Magnetic suspension bearing is to make to connect between rotor and stator without machinery in aerial by rotor suspension using magneticaction
Touching.Its principle is the line of magnetic induction with magnetic flotation line at vertical, and central spindle is parallel with magnetic flotation line, so the weight of rotor is secured to
On the track of operating, is shored using almost non-loaded central spindle toward anti-magnetic flotation line direction, form entire rotor vacantly in fixation
On running rails.
Compared with traditional rolling bearing, sliding bearing and filmatic bearing, Mechanical Contact is not present in magnetic bearing, and rotor can
To run to very high revolving speed, with mechanical wear is small, low energy consumption, noise is small, the service life is long, is not necessarily to lubrication, excellent without oily pollution etc.
Point, especially suitable in the particular surroundings such as high speed, vacuum, ultra-clean.
In general, existing active axial magnetic suspension bearing structure type is as shown in Figure 1, include front axle to iron core 1, preceding
Axial bearing control coil 2, thrust button 3, rear axial bearing control coil 4, rear axial bearing iron core 5, axis 6, wherein front axle to
Iron core 1, thrust button 3, rear axial bearing iron core 5 are all made of permeability magnetic material, and thrust button 3 is fixedly mounted on axis 6.When coil is powered
Afterwards, it according to Ampere's law, will form magnetic field in axial iron core, provide electromagnetic attraction to thrust button 3, and electromagnetic attraction is with electricity
Stream increases and increases
Magnetic line of force distribution is as shown in Fig. 2, the direction of the winding current is citing signal, when magnetic line of force analogous diagram is that unicoil is powered
Emulate obtained magnetic line of force distribution situation.When the offset of 5 side of bearing iron core axially rearward occurs for axis, in front axle to bearing control
It is passed through any direction electric current in coil 2, magnetic field can be formed between iron core 1 and thrust button 3 in front axle, provide electricity to thrust button 3
Magnetic attraction, alloing axis, axially forwardly 1 side of iron core is mobile.
Similarly, it when the axially forwardly offset of 1 side of iron core occurs for axis, is passed through in rear axial bearing control coil 4 any
Directional current can form magnetic field with thrust button 3 in rear axial bearing iron core 5, provide electromagnetic attraction to thrust button 3, make axis can
It is mobile with 5 side of bearing iron core axially rearward.Existing active axial magnetic suspension bearing structure type is by two axial iron core difference
Unidirectional electromagnetic attraction is provided to thrust button, the size for being passed through electric current by controlling bearing control coil guarantees thrust button
Center in two bearing iron cores guarantees the axial position of entire axis, realizes axial suspension.
However existing active axial magnetic suspension bearing structure has to two axial bearing iron cores of installation and thrust button
It is able to achieve axial suspension, occupied space is larger, higher cost.
Utility model content
Therefore, the technical problem to be solved by the present invention is to provide a kind of axial magnetic suspension bearings, can reduce axis
Space hold is held, production cost is reduced.
To solve the above-mentioned problems, the utility model provides a kind of axial magnetic suspension bearing, including axial iron core, control line
Circle and thrust button, axial iron core and thrust button are oppositely arranged, and control coil is arranged in axial iron core, and axial magnetic suspension bearing is also
Including for providing the repulsion generating assembly of repulsive force for axial iron core and thrust button.
Preferably, repulsion generating assembly includes magnet pair, and to including the first magnet and the second magnet, the first magnet is set magnet
Set on axial iron core, the second magnet corresponds to the first magnet and is arranged on thrust button, the first magnet and the second magnet it is opposite
Face magnetic pole is identical.
Preferably, the first magnet and the second magnet are magnet ring.
Preferably, meet a1≤x1 between the wall thickness a1 of the first magnet and the wall thickness x1 of the second magnet.
Preferably, the first magnet is embedded in axial iron core towards one end of thrust button, and the diameter for being located at axial iron core is outside
Week, the second magnet are oppositely arranged with the first magnet, and are located at thrust button towards one end of axial iron core.
Preferably, magnet is to further including third magnet and the 4th magnet, and the setting of third magnet is on axial iron core, the 4th magnetic
Body corresponds to third magnet and is arranged on thrust button, and the opposite face magnetic pole of third magnet and the 4th magnet is identical.
Preferably, third magnet and the 4th magnet are magnet ring.
Preferably, meet a2≤x2 between the wall thickness a2 of third magnet and the wall thickness x2 of the 4th magnet.
Preferably, axial iron core includes the winding slot for installing control coil, and the first magnet is located at the radial direction of winding slot
Outside, third magnet are located at the radially inner side of winding slot.
Preferably, the outer magnetic pole overall width of axial iron core is l1, and the internal magnetic pole overall width of axial iron core is l2, axial iron core
Outer magnetic pole power output width be b1, the internal magnetic pole power output width of axial iron core is b2, and the radial thickness of the first magnet is a1, second
The radial thickness of magnet is x1, and the radial thickness of third magnet is a2, and the radial thickness of the 4th magnet is x2, wherein l1≤a1+
B1, l2≤a2+b2.
Preferably, the same side magnetic pole of the first magnet and third magnet towards thrust button is opposite.
Axial magnetic suspension bearing provided by the utility model, including axial iron core, control coil and thrust button, axial iron core
It is oppositely arranged with thrust button, control coil is arranged in axial iron core, and axial magnetic suspension bearing further includes for being axial iron core
The repulsion generating assembly of repulsive force is provided with thrust button.The axial magnetic suspension bearing by repulsion generating assembly in axial iron core and
Repulsion is generated between thrust button, attraction is generated between axial iron core and thrust button by control coil, therefore needing to adjust
When bearing is to spacing between iron core and thrust button, under the collective effect of control coil and repulsion generating assembly, it is only necessary to change
The conversion of repulsive force and attraction between axial iron core and thrust button can be realized in the size that electric current is passed through in change control coil, real
Now by single iron core to the axial suspension of axis.Since magnetic circuit and electromagnetic circuit path share, there is no need in radial side
To additional arrangement magnetic structure, iron core radial dimension can be reduced.Compared with original active axial magnetic suspension bearing, the axial direction
Magnetic suspension shaft reduces an axial iron core, saves assembly space, improve in the case where not increasing radial direction space
Structure design margin reduces bearing space occupancy, reduces production cost.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of axial magnetic suspension bearing in the prior art；
Fig. 2 is the magnetic structure figure of axial magnetic suspension bearing in the prior art；
Fig. 3 is the structural schematic diagram of the axial magnetic suspension bearing of the utility model embodiment；
Fig. 4 is the up-sizing relational graph at the L of Fig. 3；
Fig. 5 is the up-sizing relational graph at the M of Fig. 3；
Fig. 6 is the magnetic structure figure in control coil power-off of the axial magnetic suspension bearing of the utility model embodiment；
Fig. 7 is the magnetic structure figure when control coil is powered of the axial magnetic suspension bearing of the utility model embodiment；
Fig. 8 is stress and electric current between the axial iron core and thrust button of the axial magnetic suspension bearing of the utility model embodiment
Graph of relation.
Appended drawing reference indicates are as follows:
1, axial iron core；2, control coil；3, thrust button；4, the first magnet；5, the second magnet；6, third magnet；7,
Four magnets；8, winding slot；9, shaft.
Specific embodiment
In conjunction with referring to shown in Fig. 3 to Fig. 8, embodiment according to the present utility model, axial magnetic suspension bearing includes axial iron
Core 1, control coil 2 and thrust button 3, axial iron core 1 and thrust button 3 are oppositely arranged, and control coil 2 is arranged in axial iron core 1,
Axial magnetic suspension bearing further includes for providing the repulsion generating assembly of repulsive force for axial iron core 1 and thrust button 3.
The axial magnetic suspension bearing generates repulsion between axial iron core 1 and thrust button 3 by repulsion generating assembly, passes through
Control coil 2 generates attraction between axial iron core 1 and thrust button 3, therefore is needing to adjust axial iron core 1 and thrust button 3
Between spacing when, under the collective effect of control coil 2 and repulsion generating assembly, it is only necessary to change and be passed through in control coil 2
The conversion of repulsive force and attraction between axial iron core 1 and thrust button 3 can be realized in the size of electric current, realizes by single iron core pair
The axial suspension of axis.Since magnetic circuit and electromagnetic circuit path share, there is no need to additionally arrange magnetic circuit in radial direction
Structure can reduce iron core radial dimension.Compared with original active axial magnetic suspension bearing, which is not increasing
In the case where adding radial direction space, reduces an axial iron core, saves assembly space, improve structure design margin,
Bearing space occupancy is reduced, production cost is reduced.
Thrust button 3 and axial iron core 1 are set in shaft 9, and wherein thrust button 3 and shaft 9 are fixedly installed, axial iron core
Clearance fit between 1 and shaft 9.By adjusting the active force between thrust button 3 and axial iron core 1, shaft 9 can be effectively realized
Axial suspension.
In the present embodiment, repulsion generating assembly includes magnet pair, and magnet is to including the first magnet 4 and the second magnet 5, and the
One magnet 4 is arranged on axial iron core 1, and the second magnet 5 corresponds to the first magnet 4 and is arranged on thrust button 3,4 He of the first magnet
The opposite face magnetic pole of second magnet 5 is identical.First magnet 4 and the second magnet 5 are that axial direction magnetizes, and 4 He of the first magnet
The opposite face magnetic pole of second magnet 5 is identical, and since there is a natural attraction between the sexes, identical charges repel each other, therefore between the first magnet 4 and the second magnet 5
Repulsion is generated, so that being located remotely from each other between axial iron core 1 and thrust button 3.
In 2 no power of control coil, axial magnetic suspension bearing magnetic circuit is as shown in Figure 6.Because of the first magnet 4, the second magnet 5
Relative direction magnetism is identical, generates repulsive force.At this time due to leakage field, the first magnet 4 being set on axial iron core 1 can be to thrust
Disk 3 generates sub-fraction attraction, but the repulsive force being less than between the first magnet 4 and the second magnet 5, generally axially iron core
Repulsive force is shown as between 1 and thrust button 3.
When control coil 2 is passed through electric current, the electromagnetic circuit that axial magnetic suspension bearing is generated by electric current is as shown in fig. 7, electricity
Magnetic magnetic circuit passes through b1, b2 section and the formation electromagnetic circuit of thrust button 3 on axial iron core 1, and axial iron core 1 is to the generation suction of thrust button 3
Gravitation.As electric current increases, axial iron core 1 generates attraction to thrust button 3 and increases, and when electric current is sufficiently large, axial iron core 1 is right
Thrust button 3, which generates attraction, can be greater than the repulsive force generated between the magnet being set on axial iron core 1 and thrust button 3, axial iron
Attraction is shown as between core 1 and thrust button 3.
Therefore, by changing the size of electric current, axial iron core 1 may be implemented to the repulsive force of thrust button 3 and attraction
Conversion is attraction between axial iron core 1 and thrust button 3 when thrust button 3 is far from axial iron core 1, when thrust button 3 is by paraxial
It is repulsive force between axial iron core 1 and thrust button 3, and then realize the axial suspension to axis when to iron core 1.
Preferably, the first magnet 4 and the second magnet 5 are magnet ring.First magnet 4 and the second magnet 5 can also show as it
Its structure type, such as multiple block-like first magnetic are set towards circumferentially spaced on the end face of thrust button 3 in axial iron core 1
Body 4, the corresponding position on 3 end face of thrust button are provided with multiple block-like second magnets 5, the second magnet 5 and the first magnet
It can be arranged in a one-to-one correspondence between 4, the first magnet 4 is embedded on axial iron core 1, and the second magnet 5 is embedded in thrust button 3.
Preferably, meet a1≤x1 between the wall thickness a1 of the first magnet 4 and the wall thickness x1 of the second magnet 5.In general,
Winding slot 8 can be set on axial iron core 1 for installing control coil 2, therefore be located at the magnetic of the axial iron core 1 of 8 two sides of winding slot
Degree of having a lot of social connections is smaller, and the magnetic path width of the thrust button 3 opposite with axial iron core 1 is larger, therefore when the wall thickness a1 of the first magnet 4 is greater than
When the wall thickness x1 of the second magnet 5, the length of magnetic path of first magnet 4 on thrust button 3 is also longer, by 4 leakage field institute of the first magnet
The attraction of generation is also relatively large.And if the wall thickness x1 of the second magnet 5 be greater than the first magnet 4 wall thickness a1 when, due to around
The limitation of wire casing 8, therefore the magnetic path width of affected axial iron core 1 is also limited under the effect of the leakage field of the second magnet 5,
It is limited that leakage field i.e. by the second magnet 5 is influenced generated attraction, and when being not powered on, it should it reduces leakage field to the greatest extent and is produced
Influence of the raw attraction to the repulsive force between the first magnet 4 and the second magnet 5, therefore so that a1≤x1, can more added with
Effect ground reduces the first magnet 4 to the attraction of thrust button 3.Preferably, a1=x1.
In the present embodiment, the first magnet 4 is embedded in axial iron core 1 towards one end of thrust button 3, and is located at axial iron core
1 outer radial periphery, the second magnet 5 are oppositely arranged with the first magnet 4, and are located at thrust button 3 towards one end of axial iron core 1.It is logical
Aforesaid way is crossed, can make to generate repulsion between the first magnet 4 and the second magnet 5 in the radial outside of axial iron core 1, due to
First magnet 4 and the second magnet 5 are magnet ring, therefore enable to repulsion distribution more uniform, and axially loaded more balances, knot
Structure is more stable.
In the present embodiment, magnet is to further including third magnet 6 and the 4th magnet 7, and the setting of third magnet 6 is in axial iron core
On 1, the 4th magnet 7 corresponds to third magnet 6 and is arranged on thrust button 3, the opposite face magnetic pole of third magnet 6 and the 4th magnet 7
It is identical.Third magnet 6 and the 4th magnet 7 are also capable of forming magnet pair, due to the opposite face magnetic of third magnet 6 and the 4th magnet 7
It is extremely identical, therefore repulsive force can be generated between third magnet 6 and the 4th magnet 7, so that between axial iron core 1 and thrust button 3
It is located remotely from each other.
The action principle and process of third magnet 6 and the 4th magnet 7 are identical as the first magnet 4 and the second magnet 5, herein not
It is described in detail again.
Preferably, the first magnet 4 and third magnet 6 are towards the same side magnetic pole of thrust button 3 on the contrary, for example, the first magnet 4
It is the pole S towards one end of thrust button 3, third magnet 6 is the pole N towards one end of thrust button 3, and such structure is to make the first magnetic
While generating repulsion between body 4 and the second magnet 5 and third magnet 6 and the 4th magnet 7, it is capable of forming the permanent magnetism of closure
Body magnetic structure, so that magnetic circuit and original electromagnetic circuit path share, without additionally arranging magnetic in radial direction
Line structure reduces iron core radial dimension.
Preferably, third magnet 6 and the 4th magnet 7 are magnet ring.Third magnet 6 and the 4th magnet 7 can also show as it
Its structure type, such as the circumferentially-spaced spaced block shaped magnet etc. along thrust button 3.
Meet a2≤x2 between the wall thickness a2 of third magnet 6 and the wall thickness x2 of the 4th magnet 7.Preferably, a2=x2.
Axial iron core 1 includes the winding slot 8 for installing control coil 2, and the diameter that the first magnet 4 is located at winding slot 8 is outside
Side, third magnet 6 are located at the radially inner side of winding slot 8.
Two magnets to can repulsive force be formed to axial iron core 1 and thrust button 3 in the radially opposite sides of winding slot 8 respectively,
So that being more uniformly stressed between axial iron core 1 and thrust button 3, structure is more stable.
Preferably, the outer magnetic pole overall width of axial iron core 1 is l1, and the internal magnetic pole overall width of axial iron core 1 is l2, axial iron
The outer magnetic pole power output width of core 1 is b1, and the internal magnetic pole power output width of axial iron core 1 is b2, and the radial thickness of the first magnet 4 is
A1, the radial thickness of the second magnet 5 are x1, and the radial thickness of third magnet 6 is a2, and the radial thickness of the 4th magnet 7 is x2,
Middle l1≤a1+b1, l2≤a2+b2.By using the structure, the magnetic saturation of axial iron core 1 can be effectively improved, is improved axial
The magnetic property of magnetic suspension bearing.
Fig. 8 is stress and current relationship curve graph between axial iron core 1 and thrust button 3 under certain structural parameters, wherein power
Positive and negative expression Impact direction.It can be seen from the figure that electric current is bigger, repulsion is smaller, and attraction is bigger.
Those skilled in the art will readily recognize that above-mentioned each advantageous manner can be free under the premise of not conflicting
Ground combination, superposition.
The above is only the preferred embodiments of the present utility model only, is not intended to limit the utility model, all practical at this
Made any modifications, equivalent replacements, and improvements etc., should be included in the guarantor of the utility model within novel spirit and principle
Within the scope of shield.Above are merely preferred embodiments of the utility model, it is noted that for the ordinary skill of the art
For personnel, without deviating from the technical principle of the utility model, several improvements and modifications can also be made, these improvement
It also should be regarded as the protection scope of the utility model with modification.
Claims (11)
1. a kind of axial magnetic suspension bearing, which is characterized in that including axial iron core (1), control coil (2) and thrust button (3), institute
It states axial iron core (1) and the thrust button (3) is oppositely arranged, control coil (2) setting is interior in the axial iron core (1),
The axial magnetic suspension bearing further includes for providing the repulsion of repulsive force for the axial iron core (1) and the thrust button (3)
Generating assembly.
2. axial magnetic suspension bearing according to claim 1, which is characterized in that the repulsion generating assembly includes magnet
Right, the magnet is to including the first magnet (4) and the second magnet (5), and the first magnet (4) setting is in the axial iron core
(1) on, second magnet (5) corresponds to first magnet (4) and is arranged on the thrust button (3), first magnet
(4) identical with the opposite face magnetic pole of second magnet (5).
3. axial magnetic suspension bearing according to claim 2, which is characterized in that first magnet (4) and described second
Magnet (5) is magnet ring.
4. axial magnetic suspension bearing according to claim 3, which is characterized in that the wall thickness a1 of first magnet (4) with
Meet a1≤x1 between the wall thickness x1 of second magnet (5).
5. axial magnetic suspension bearing according to any one of claim 2 to 4, which is characterized in that first magnet (4)
It is embedded one end in the axial iron core (1) towards the thrust button (3), and is located at the outer radial periphery of the axial iron core (1),
Second magnet (5) is oppositely arranged with first magnet (4), and is located at the thrust button (3) towards the axial iron core
(1) one end.
6. axial magnetic suspension bearing according to claim 5, which is characterized in that the magnet is to further including third magnet
(6) it is arranged on the axial iron core (1) with the 4th magnet (7), the third magnet (6), the 4th magnet (7) corresponds to
The third magnet (6) is arranged on the thrust button (3), the opposite face of the third magnet (6) and the 4th magnet (7)
Magnetic pole is identical.
7. axial magnetic suspension bearing according to claim 6, which is characterized in that the third magnet (6) and the described 4th
Magnet (7) is magnet ring.
8. axial magnetic suspension bearing according to claim 7, which is characterized in that the wall thickness a2 of the third magnet (6) with
Meet a2≤x2 between the wall thickness x2 of 4th magnet (7).
9. axial magnetic suspension bearing according to claim 6, which is characterized in that the axial direction iron core (1) includes for pacifying
The winding slot (8) of the control coil (2) is filled, first magnet (4) is located at the radial outside of the winding slot (8), described
Third magnet (6) is located at the radially inner side of the winding slot (8).
10. axial magnetic suspension bearing according to any one of claims 6 to 9, which is characterized in that the axial direction iron core
(1) outer magnetic pole overall width is l1, and the internal magnetic pole overall width of the axial direction iron core (1) is l2, the outer magnetic of the axial direction iron core (1)
Width is contributed as b1 in pole, and the internal magnetic pole power output width of the axial direction iron core (1) is b2, the radial thickness of first magnet (4)
For a1, the radial thickness of second magnet (5) is x1, and the radial thickness of the third magnet (6) is a2, the 4th magnet
(7) radial thickness is x2, wherein l1≤a1+b1, l2≤a2+b2.
11. axial magnetic suspension bearing according to any one of claims 6 to 9, which is characterized in that first magnet
(4) and the same side magnetic pole of the third magnet (6) towards the thrust button (3) is opposite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821632015.XU CN208935161U (en) | 2018-10-08 | 2018-10-08 | Axial magnetic suspension bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821632015.XU CN208935161U (en) | 2018-10-08 | 2018-10-08 | Axial magnetic suspension bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208935161U true CN208935161U (en) | 2019-06-04 |
Family
ID=66723860
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821632015.XU Active CN208935161U (en) | 2018-10-08 | 2018-10-08 | Axial magnetic suspension bearing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208935161U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109026999A (en) * | 2018-10-08 | 2018-12-18 | 珠海格力电器股份有限公司 | Axial magnetic suspension bearing |
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2018
- 2018-10-08 CN CN201821632015.XU patent/CN208935161U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109026999A (en) * | 2018-10-08 | 2018-12-18 | 珠海格力电器股份有限公司 | Axial magnetic suspension bearing |
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