CN105422647A - Auxiliary device for magnetic bearing - Google Patents
Auxiliary device for magnetic bearing Download PDFInfo
- Publication number
- CN105422647A CN105422647A CN201510995180.6A CN201510995180A CN105422647A CN 105422647 A CN105422647 A CN 105422647A CN 201510995180 A CN201510995180 A CN 201510995180A CN 105422647 A CN105422647 A CN 105422647A
- Authority
- CN
- China
- Prior art keywords
- air
- main body
- bearing
- matched
- magnetic
- 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.)
- Granted
Links
- 238000007789 sealing Methods 0.000 claims description 16
- 239000002184 metal Substances 0.000 claims description 9
- 229910052751 metal Inorganic materials 0.000 claims description 9
- 239000000725 suspension Substances 0.000 abstract description 4
- 230000005389 magnetism Effects 0.000 abstract description 2
- 230000017525 heat dissipation Effects 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000005611 electricity Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000000110 cooling liquid Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000002887 superconductor Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000007704 transition Effects 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
- F16C41/00—Other accessories, e.g. devices integrated in the bearing not relating to the bearing function as such
-
- 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
-
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2127/00—Auxiliary mechanisms
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
The invention discloses an auxiliary device for a magnetic bearing and relates to a bearing. A wind collecting sleeve matched with aerofoil-shaped blades is further arranged on a shaft; the wind collecting sleeve comprises a wind inlet end and a wind outlet end; the aerofoil-shaped blades are wrapped with the wind inlet end; the wind outlet end extends out of a bearing body through the bearing body; a wind outlet is formed in the wind outlet end; the wind collecting sleeve is provided with a plurality of wind outlet points at one section inside the bearing body uniformly and densely; a sliding sleeve is further arranged inside the wind collecting sleeve slidingly; a wind outlet passage matched with the wind outlet points is formed in the sliding sleeve; accommodating grooves matched with fixed grooves are formed in the wind collecting sleeve; reset springs are arranged in the accommodating grooves; and magnet blocks matched with the fixed grooves are arranged on the reset springs. Compared with the prior art, an airflow jetting device is arranged on the shaft, so that airflow is generated when the shaft rotates; and when the magnetic bearing loses a stable point and loses magnetism, airflow can be enabled to jet into the magnetic bearing, so that the airflow can keep the shaft in a suspension state inside the magnetic bearing.
Description
Technical field
The present invention relates to a kind of bearing, especially a kind of magnetic bearing.
Background technique
Magnetic bearing is a kind of novel high-performance bearing.Compared with conventional ball bearings, sliding bearing and filmatic bearing, there is not Mechanical Contact in magnetic bearing, rotor can reach very high running speed, have that mechanical wear is little, energy consumption is low, noise is little, the life-span is long, without the need to lubrication, without advantages such as oil pollutions, particularly suitable high speed, vacuum, the particular surroundings such as ultra-clean.The fields such as machining, turbomachinery, Aero-Space, vacuum technique, rotor dynamics identification and test can be widely used in, be acknowledged as extremely promising novel bearing.Magnetic bearing is divided into can be divided into following three major types according to the presentation mode of magnetic force: active magnetic bearing, and also referred to as active magnetic bearings, magnetic field is controlled, by detecting by the position of suspended rotor, carrying out ACTIVE CONTROL realize rotor suspension by control system; Passive magnetic bearing, also referred to as passive magnetic bearing, realizes the supporting to rotor portion degrees of freedom with permanent magnet or superconductor; Mixing magnetic axis, contains electromagnet and permanent magnet or superconductor in its mechanical structure.
Active magnetic bearings has the advantages such as rotating speed is high, contactless, unlubricated, has the advantage that can not be substituted at some special occasions.But a kind of active magnetic bearing needs to power, once interruption of power supply will allow magnetic disappear, at this moment the axle of High Rotation Speed just cannot be suspended in magnetic bearing, and rub increase instantaneously, like this be very easy to damage is caused to axle, more serious meeting allow axle fracture or directly allow motor protect scrap.
Summary of the invention
The present invention is directed to deficiency of the prior art, provide magnetic bearing auxiliary device, this device has airflow injection device on axle, air-flow can be produced when axle rotates, air-flow can be allowed to the state of suspension of jet-stream wind retainer shaft in magnetic bearing in magnetic bearing when magnetic bearing loses when point loses magnetic, solve in the past after magnetic bearing dead electricity, magnetic bearing and axle rub and increase, the problem of infringement axle and motor.
In order to solve the problems of the technologies described above, the present invention is solved by following technical proposals: magnetic bearing auxiliary device, comprise bearing main body, described bearing main body is set on axle, described bearing main body operationally can and described axle between produce gap, on described axle, uniform circular is provided with several airfoil fans, described axle is also provided with the collection wind cover matched with described airfoil fan, described collection wind cover comprises air intake and outlet air end, described air intake wraps described airfoil fan, described outlet air end extends to outside described bearing main body by described bearing main body, described outlet air end is provided with exhaust outlet, described collection wind is enclosed within that in described bearing main body one section is even is intensively provided with several air-out points, also slide in described collection wind cover and be provided with flip sleeve, described flip sleeve is provided with the air-out passage matched with described air-out point, described exhaust outlet is movably set with several fan-shaped diaphragm seals, described fan-shaped diaphragm seal connects flip sleeve by connecting rod, described collection wind puts and is provided with annular groove, described flip sleeve is provided with the plectrum matched with described annular groove, also back-up ring is provided with in described collection wind cover, some springs are provided with between described back-up ring and described flip sleeve, described flip sleeve is gone back uniform circular and be provided with several fixed grooves, described fixed groove is in described bearing main body, the placement groove matched with described fixed groove is provided with in described collection wind cover, Returnning spring is provided with in described placement groove, described Returnning spring is provided with the magnetic patch matched with described fixed groove, the magnetic of described magnetic patch and the bearing main body after being energized repel each other.
In technique scheme, preferably, be evenly provided with several slideways in described collection wind cover, described flip sleeve is arranged on described slideway.
In technique scheme, preferably, described air-out passage is provided with the Sealing shield ring matched with described air-out point.
In technique scheme, preferably, described Sealing shield ring is provided with endless metal circle, described states sealing chute air-out point being provided with and matching with described endless metal circle.
In technique scheme, preferably, described fan-shaped diaphragm seal is enclosed with sealing rubber cover.
The present invention is a kind of magnetic bearing auxiliary device, and after mainly solving the unexpected dead electricity of magnetic bearing, magnetic bearing loses the problem that magnetic causes axle to suspend.The present invention collects high velocity air when axle High Rotation Speed by airfoil fan, when magnetic bearing normally works, high velocity air does not affect magnetic bearing work from the injection of axle afterbody, when after magnetic bearing dead electricity, magnetic patch in collection wind cover can sense fast, then automatic switching on air-out point and air-out passage spouting from air-out point by high velocity air, in magnetic bearing, hold up axle by air-flow, prevent axle and magnetic bearing from colliding the damage causing axle.
Compared with prior art, the invention has the beneficial effects as follows: this device has airflow injection device on axle, air-flow can be produced when axle rotates, air-flow can be allowed to the state of suspension of jet-stream wind retainer shaft in magnetic bearing in magnetic bearing when magnetic bearing loses when point loses magnetic, solve in the past after magnetic bearing dead electricity, magnetic bearing and axle rub and increase, the problem of infringement axle and motor.
Accompanying drawing explanation
Fig. 1 is front schematic view of the present invention.
Fig. 2 is that the present invention collects wind cover schematic diagram.
Fig. 3 is that the present invention collects wind cover interior profile schematic diagram.
Fig. 4 is that Fig. 3-A of the present invention locates schematic diagram.
Fig. 5 is that Fig. 3-B of the present invention locates schematic diagram.
Fig. 6 is airfoil fan front schematic view of the present invention.
Fig. 7 is bearing main body generalized section of the present invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the present invention is described in further detail.
As shown in Figures 1 to 7, a kind of magnetic bearing auxiliary device, comprise bearing main body 1, in described bearing main body 1, uniform circular is provided with several iron cores 11, described iron core 11 is wound with electromagnetic coil 12, be provided with ball bushing 83 between described iron core 11, rolling in described ball bushing 83 is provided with steel ball ball 82, is provided with oil outlet 83 bottom described ball bushing 81.Described bearing main body 1 is set on axle 2, described bearing main body 1 operationally can and described axle 2 between produce gap, on described axle 2, uniform circular is provided with several airfoil fans 21.Described axle 2 is also provided with the collection wind matched with described airfoil fan 21 and overlaps 3, described collection wind cover 3 comprises air intake 31 and outlet air end 32, described air intake 31 wraps described airfoil fan, described air intake 31 in inverted cone-shaped to little to outlet air end 32 transition.Described outlet air end 32 extends to outside described bearing main body 1 by described bearing main body 1, and described outlet air end 32 is provided with exhaust outlet.In described bearing main body 1 one section of described collection wind cover 3 is even is intensively provided with several air-out points 34, several slideways 37 are evenly provided with in described collection wind cover 3, described flip sleeve 4 is arranged on described slideway 37, described flip sleeve 4 is provided with the air-out passage matched with described air-out point 34, described air-out passage is provided with the Sealing shield ring 42 matched with described air-out point 34, described Sealing shield ring 42 is provided with endless metal circle 43, described stating on air-out point 34 is provided with sealing chute 44, sealing chute 44 is provided with the spacing slideway 45 matched with described endless metal circle 43.Described exhaust outlet is movably set with several fan-shaped diaphragm seals 46, described fan-shaped diaphragm seal 46 is enclosed with sealing rubber cover, described fan-shaped diaphragm seal 46 connects flip sleeve 4 by connecting rod 47.Described collection wind cover 3 is provided with annular groove 33, described flip sleeve 4 is provided with the plectrum 41 matched with described annular groove 33, also be provided with back-up ring 35 in described collection wind cover 3, between described back-up ring 35 and described flip sleeve 4, be provided with some springs 36.Described flip sleeve 4 is gone back uniform circular and be provided with several fixed grooves 63, be provided with in described collection wind cover 3 and place groove 61, Returnning spring 62 is provided with in described placement groove 61, described Returnning spring 62 is provided with the magnetic patch 64 matched with described fixed groove 63, the magnetic of described magnetic patch 64 and the bearing main body 1 after being energized repel each other.Described collection wind cover 3 is evenly provided with several ball grooves 38, and rolling in described ball groove 38 is provided with the little ball 39 matched with described bearing main body 1.Also be provided with heat dissipation channel 91 in described bearing main body 1, described iron core 11 is provided with the radiating groove 92 matched with described heat dissipation channel 91, described heat dissipation channel 91 is circumscribed with radiator 9, has the cooling liquid that can flow in described heat dissipation channel 91.
The present invention is a kind of magnetic bearing auxiliary device, mainly solves magnetic bearing and loses magnetism when unexpected power-off and make the problem that axle 2 cannot be stable in the middle of the bearing main body 1.On axle 2, be provided with airfoil fan 21 to address this problem the present invention and be fixedly installed on the collection wind cover 3 on axle 2.When axle 2 runs, collection wind cover 3 and the flip sleeve 4 all high speed rotating together with axle 2 be arranged in collection wind cover 3, this in the effect next part wind cover 3 of airfoil fan 21, has high velocity air pass, when normally working, high velocity air can enter from air intake 31, leave from outlet air end 32, do not affect the work of bearing main body 1.When bearing main body 1 power-off suddenly, in bearing main body 1, magnetic disappears, the magnetic patch 64 repelled each other with the bearing main body 1 after energising bounces back under the effect of Returnning spring 62, magnetic patch 64 is allowed to depart from fixed groove 63, now whole flip sleeve 4 is in the effect lower slider of spring 36, by connecting rod 47, fan-shaped diaphragm seal 46 is retracted, several fan-shaped diaphragm seals 46 are allowed to live outlet air end 32 in fan-shaped closure, then allow block circle 42 move by sealing chute 44 agree with air-out point 34, in order to ensure that block circle 42 and air-out point 34 agree with air tight completely, then in sealing chute 44, be provided with spacing slideway 45, block circle 42 is arranged endless metal circle 43, endless metal circle 43 is in spacing slideway 45, time mobile, endless metal circle 43 will move in spacing slideway 45, band motive sealing chute 44 steadily agrees with air-out point 34.Now because fan-shaped diaphragm seal 46 has closed outlet air end 32, air-flow in collection wind cover 3 can only be sprayed by air-out passage and air-out point 34, these air-flows ejected are got on bearing main body 1 and axle 2 Eddy diffusion are lifted under axle 2 High Rotation Speed, now just can slow down by axle 2 until stop by disable motor, as long as axle 2 will have jet-impingement in rotation always, make can not directly to contact between axle 2 with bearing main body 1 the larger friction of generation and cause damage to axle 2.Time simultaneously in order to ensure to occur accident, frictional force is minimum, also on collection wind cover 3, be evenly provided with several ball grooves 38, little ball 39 is provided with in ball groove 38, ball bushing 83 is provided with between described iron core 11, roll in described ball bushing 83 and be provided with steel ball ball 82, when going wrong, axle 2 is also the large sliding friction of rolling friction instead of frictional force after contacting with bearing main body 1 like this.In order to keep the stable of bearing main body 1, also in bearing main body 1, be also provided with heat dissipation channel 91, described iron core 11 is provided with the radiating groove 92 matched with described heat dissipation channel 91, described heat dissipation channel 91 is circumscribed with radiator 9, has the cooling liquid that can flow in described heat dissipation channel 91.By ceaselessly flowing, cooling liquid is lowered the temperature to bearing main body 1, absorbs the heat produced because of coil electricity, keeps bearing main body 1 working stability not go out and quits work because of overheated.
Claims (5)
1. magnetic bearing auxiliary device, comprise bearing main body (1), described bearing main body (1) is set on axle (2), described bearing main body (1) operationally can and described axle (2) between produce gap, it is characterized by, the upper uniform circular of described axle (2) is provided with several airfoil fans (21), described axle (2) is also provided with the collection wind cover (3) matched with described airfoil fan (21), described collection wind cover (3) comprises air intake (31) and outlet air end (32), described air intake (31) wraps described airfoil fan (21), described outlet air end (32) extends to described bearing main body (1) outward by described bearing main body (1), described outlet air end (32) is provided with exhaust outlet, in described bearing main body (1) one section of described collection wind cover (3) is even is intensively provided with several air-out points (34), also slide in described collection wind cover (3) and be provided with flip sleeve (4), described flip sleeve (4) is provided with the air-out passage matched with described air-out point (34), described exhaust outlet is movably set with several fan-shaped diaphragm seals (46), described fan-shaped diaphragm seal (46) connects flip sleeve (4) by connecting rod (47), described collection wind cover (3) is provided with annular groove (33), described flip sleeve (4) is provided with the plectrum (41) matched with described annular groove (33), back-up ring (35) is also provided with in described collection wind cover (3), some springs (36) are provided with between described back-up ring (35) and described flip sleeve (4), described flip sleeve (4) goes back uniform circular and is provided with several fixed grooves (63), be provided with in described collection wind cover (3) and place groove (61), Returnning spring (62) is provided with in described placement groove (61), described Returnning spring (62) is provided with the magnetic patch (64) matched with described fixed groove (63), the magnetic of described magnetic patch (64) and the bearing main body (1) after being energized repel each other.
2. magnetic bearing auxiliary device according to claim 1, is characterized by, and is evenly provided with several slideways (37) in described collection wind cover (3), and described flip sleeve (4) is arranged on described slideway (37).
3. magnetic bearing auxiliary device according to claim 1, is characterized by, and described air-out passage is provided with the Sealing shield ring (42) matched with described air-out point (34).
4. magnetic bearing auxiliary device according to claim 3, it is characterized by, described Sealing shield ring (42) is provided with endless metal circle (43), and described states the sealing chute (45) air-out point (34) being provided with and matching with described endless metal circle (43).
5. magnetic bearing auxiliary device according to claim 1, is characterized by, and described fan-shaped diaphragm seal (46) is enclosed with sealing rubber cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510995180.6A CN105422647B (en) | 2015-12-28 | 2015-12-28 | magnetic bearing auxiliary device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510995180.6A CN105422647B (en) | 2015-12-28 | 2015-12-28 | magnetic bearing auxiliary device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105422647A true CN105422647A (en) | 2016-03-23 |
| CN105422647B CN105422647B (en) | 2018-07-03 |
Family
ID=55501100
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510995180.6A Active CN105422647B (en) | 2015-12-28 | 2015-12-28 | magnetic bearing auxiliary device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105422647B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4982126A (en) * | 1988-04-29 | 1991-01-01 | Societe De Mecanique Magnetique S.A. | Auxiliary bearing having a graphite stator for a rotary shaft mounted on magnetic bearings |
| US5126612A (en) * | 1987-04-09 | 1992-06-30 | Societe Europeenne De Propulsion | Active radial magnetic bearing combined with a back-up bearing |
| US5355040A (en) * | 1992-07-23 | 1994-10-11 | The Glacier Metal Company Limited | Magnetic bearing back-up |
| CN104279236A (en) * | 2013-05-29 | 2015-01-14 | Skf磁性机械技术公司 | Auxiliary bearing for magnetically suspended rotor system |
| CN204239469U (en) * | 2014-11-20 | 2015-04-01 | 湘潭电机股份有限公司 | A kind of auxiliary bearing structure of electromagnetic bearing |
-
2015
- 2015-12-28 CN CN201510995180.6A patent/CN105422647B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5126612A (en) * | 1987-04-09 | 1992-06-30 | Societe Europeenne De Propulsion | Active radial magnetic bearing combined with a back-up bearing |
| US4982126A (en) * | 1988-04-29 | 1991-01-01 | Societe De Mecanique Magnetique S.A. | Auxiliary bearing having a graphite stator for a rotary shaft mounted on magnetic bearings |
| US5355040A (en) * | 1992-07-23 | 1994-10-11 | The Glacier Metal Company Limited | Magnetic bearing back-up |
| CN104279236A (en) * | 2013-05-29 | 2015-01-14 | Skf磁性机械技术公司 | Auxiliary bearing for magnetically suspended rotor system |
| CN204239469U (en) * | 2014-11-20 | 2015-04-01 | 湘潭电机股份有限公司 | A kind of auxiliary bearing structure of electromagnetic bearing |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105422647B (en) | 2018-07-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Wang Hongwei Inventor before: Wang Pengkao |
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| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20180514 Address after: 221700 Yuanzhao Village Industrial Zone, Zhao Zhuang Town, Fengxian County, Xuzhou, Jiangsu Applicant after: XUZHOU GEILI MAGNETIC INDUSTRY CO.,LTD. Address before: 315200 666 Feng Ming Road, Zhenpu Town, Zhenhai District, Ningbo, Zhejiang Applicant before: NINGBO DAFEN SEIKO BEARING CO.,LTD. |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Auxiliary device for magnetic bearing Effective date of registration: 20191218 Granted publication date: 20180703 Pledgee: Fengxian County science and Technology Development Service Station Pledgor: XUZHOU GEILI MAGNETIC INDUSTRY CO.,LTD. Registration number: Y2019320000375 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20220112 Granted publication date: 20180703 Pledgee: Fengxian County science and Technology Development Service Station Pledgor: XUZHOU GEILI MAGNETIC INDUSTRY CO.,LTD. Registration number: Y2019320000375 |
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| EE01 | Entry into force of recordation of patent licensing contract | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20160323 Assignee: Xuzhou Dongqi electromechanical Co.,Ltd. Assignor: XUZHOU GEILI MAGNETIC INDUSTRY CO.,LTD. Contract record no.: X2022320000015 Denomination of invention: Magnetic bearing auxiliary device Granted publication date: 20180703 License type: Exclusive License Record date: 20220118 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Magnetic bearing auxiliary device Granted publication date: 20180703 Pledgee: Bank of Jiangsu Co.,Ltd. Xuzhou Branch Pledgor: XUZHOU GEILI MAGNETIC INDUSTRY CO.,LTD. Registration number: Y2024980011527 |