CN105485165B - A kind of magnetic bearing auxiliary air appliance - Google Patents
A kind of magnetic bearing auxiliary air appliance Download PDFInfo
- Publication number
- CN105485165B CN105485165B CN201511000833.9A CN201511000833A CN105485165B CN 105485165 B CN105485165 B CN 105485165B CN 201511000833 A CN201511000833 A CN 201511000833A CN 105485165 B CN105485165 B CN 105485165B
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- China
- Prior art keywords
- air
- main body
- bearing
- magnetic
- engaged
- 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.)
- Expired - Fee Related
Links
- 238000007789 sealing Methods 0.000 claims description 15
- 239000002184 metal Substances 0.000 claims description 9
- 229910052751 metal Inorganic materials 0.000 claims description 9
- 238000005096 rolling process Methods 0.000 claims description 2
- 238000002347 injection Methods 0.000 abstract description 3
- 239000007924 injection Substances 0.000 abstract description 3
- 230000017525 heat dissipation Effects 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 230000005611 electricity Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000002826 coolant Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000009969 flowable effect Effects 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
- 238000001514 detection method 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
- 230000005389 magnetism Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization 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
- 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
-
- 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
- F16C32/0444—Details of devices to control the actuation of the electromagnets
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
- Support Of The Bearing (AREA)
- Wind Motors (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
A kind of magnetic bearing auxiliary air appliance, it is related to a kind of bearing, the collection windband being engaged with the airfoil fan is additionally provided with axle, collection windband includes air intake and outlet air end, air intake wraps described airfoil fan, outlet air end is extended to by described bearing main body outside described bearing main body, air outlet is provided with outlet air end, collection windband is provided with air-out point in the bearing main body, also slided in collection windband and be provided with slip cap, air-out passage is provided with slip cap, the placement groove being engaged with the fixed groove is provided with collection windband, place in groove and be provided with back-moving spring, the magnetic patch being engaged with the fixed groove is provided with back-moving spring, the small ball being engaged with bearing main body is provided with collection windband.Compared with prior art, the present apparatus has airflow injection device on axle, can produce air-flow when axle rotates, and the air-flow suspended state of jet-stream wind holding shaft in magnetic bearing into magnetic bearing can be allowed when magnetic bearing is lost when point loses magnetic.
Description
Technical field
The present invention relates to a kind of bearing, especially a kind of magnetic bearing.
Background technology
Magnetic bearing, it is a kind of novel high-performance bearing.Compared with conventional ball bearings, sliding bearing and filmatic bearing,
Mechanical Contact is not present in magnetic bearing, and rotor can reach very high running speed, have mechanical wear is small, energy consumption is low, noise is small,
Long lifespan, without lubrication, without oily pollution the advantages that, the particular surroundings such as particularly suitable high speed, vacuum, ultra-clean.It can be widely used for machine
The fields such as tool processing, turbomachinery, Aero-Space, vacuum technique, rotor dynamics identification and test, being acknowledged as pole has
The novel bearing of future.Magnetic bearing is divided into can be divided into following three major types according to the presentation mode of magnetic force:Active magnetic bearing, also referred to as
Active magnetic bearings, magnetic field are controllable, and the position of rotor is suspended by detection, and carrying out active control realization by control system turns
Son suspends；Passive magnetic bearing, also referred to as passive magnetic bearing, the branch to the rotor portion free degree is realized with permanent magnet or superconductor
Hold；Magnetic axis is mixed, electromagnet and permanent magnet or superconductor are contained in its mechanical structure.
Active magnetic bearings have the advantages that rotating speed is high, contactless, unlubricated, are whether there is in some special occasions alternative excellent
Gesture.But a kind of active magnetic bearing needs to be powered, once power failure will allow magnetic to disappear, at this moment rotate at a high speed
Axle can not be just suspended in magnetic bearing, moment friction increase, be so very easy to that axle is caused to damage, more serious meeting allows axle to break
Split or directly allow motor to be protected and scrap.
The content of the invention
The present invention is directed to deficiency of the prior art, there is provided a kind of magnetic bearing auxiliary air appliance, the present apparatus is on axle
With airflow injection device, air-flow can be produced when axle rotates, air-flow can be allowed to magnetic bearing when magnetic bearing is lost when point loses magnetic
Suspended state of the interior jet-stream wind holding shaft in magnetic bearing, after solving conventional magnetic bearing dead electricity, magnetic bearing increases with axle friction,
The problem of damaging axle and motor.
In order to solve the above-mentioned technical problem, the present invention is addressed by following technical proposals：A kind of magnetic bearing air is auxiliary
Help device, including bearing main body, described bearing main body is set on axle, described bearing main body at work can with it is described
Gap is produced between axle, uniform circular is provided with several airfoil fans on described axle, is additionally provided with described axle and institute
The collection windband that airfoil fan is engaged is stated, described collection windband includes air intake and outlet air end, described air intake parcel residence
The airfoil fan stated, described outlet air end are extended to outside described bearing main body by described bearing main body, gone out in described
Air outlet is provided with wind end, collect windband in the bearing main body one section is uniformly intensive to be provided with several air-out
Point, also slide in described collection windband and be provided with slip cap, be provided with described slip cap and go out with what the air-out point matched
Wind passage, several fan-shaped diaphragm seals is movably set with described air outlet, described fan-shaped diaphragm seal is connected by connecting rod
Slip cap, annular groove is provided with described collection windband, is provided with described slip cap and is engaged with the annular groove
Plectrum, be additionally provided with back-up ring in described collection windband, some bullets be provided between described back-up ring and described slip cap
Spring, go back uniform circular on described slip cap and be provided with several fixed grooves, described fixed groove on the slip cap,
The placement groove being engaged with the fixed groove is provided with described collection windband, reset is provided with described placement groove
Spring, is provided with the magnetic patch being engaged with the fixed groove on described back-moving spring, after the magnetic of the magnetic patch and energization
Bearing main body repel each other, be evenly arranged with several ball grooves in described collection windband, roll and set in described ball groove
It is equipped with the small ball being engaged with the bearing main body.
In above-mentioned technical proposal, it is preferred that several slideways, described slip cap are evenly arranged with described collection windband
It is arranged on described slideway.
In above-mentioned technical proposal, it is preferred that the sealing being engaged with the air-out point is provided with described air-out passage
Back-up ring.
In above-mentioned technical proposal, it is preferred that endless metal circle is provided with described Sealing shield ring, described states air-out point
On be provided with the sealing chute being engaged with the endless metal circle.
In above-mentioned technical proposal, it is preferred that be enclosed with sealing rubber cover on described fan-shaped diaphragm seal.
The present invention is a kind of magnetic bearing servicing unit, and magnetic bearing forfeiture magnetic causes after mainly solving the unexpected dead electricity of magnetic bearing
The problem of axle can not suspend.The present invention collects high velocity air when axle rotates at a high speed by airfoil fan, when the normal work of magnetic bearing
When making, high velocity air projects from axle afterbody does not influence magnetic bearing work, and after magnetic bearing dead electricity, the magnetic patch collected in windband can be quick
Sense, then automatic switching on air-out point and air-out passage are spouting from air-out point by high velocity air, by air-flow in magnetic axis
Interior picking-up axle is held, prevents axle from colliding the damage for causing axle with magnetic bearing.Small ball is also set up in collection windband, avoids axle and bearing
Damage caused by when directly contacting.
Compared with prior art, the beneficial effects of the invention are as follows：The present apparatus has airflow injection device on axle, can be in axle
Air-flow is produced during rotation, when magnetic bearing lose point lose magnetic when can allow air-flow into magnetic bearing jet-stream wind holding shaft in magnetic bearing
Interior suspended state, after solving conventional magnetic bearing dead electricity, the friction of magnetic bearing and axle increases, the problem of damaging axle and motor.
Brief description of the drawings
Fig. 1 is front schematic view of the present invention.
Fig. 2 is present invention collection windband schematic diagram.
Fig. 3 is present invention collection windband interior profile schematic diagram.
Fig. 4 is Fig. 3-A places of the present invention schematic diagram.
Fig. 5 is Fig. 3-B places of the present invention schematic diagram.
Fig. 6 is airfoil fan front schematic view of the present invention.
Fig. 7 is bearing main body diagrammatic cross-section of the present invention.
Embodiment
The present invention is described in further detail with embodiment below in conjunction with the accompanying drawings.
As shown in Figures 1 to 7, a kind of magnetic bearing servicing unit, including bearing main body 1, in described bearing main body 1
It is provided with several iron cores 11 nicely rounded week, magnet coil 12 is wound with described iron core 11, is set between described iron core 11
There is sphero-cylindrical lens 81, rolled in described sphero-cylindrical lens 81 and be provided with steel ball ball 82, the described bottom of sphero-cylindrical lens 81 is provided with oil-out
83.Described bearing main body 1 is set on axle 2, and described bearing main body 1 can produce seam between described axle 2 at work
Gap, uniform circular is provided with several airfoil fans 21 on described axle 2.It is additionally provided with described axle 2 and the aerofoil profile leaf
The collection windband 3 that piece 21 is engaged, described collection windband 3 include air intake 31 and outlet air end 32, and described air intake 31 wraps
Described airfoil fan, described air intake 31 is in inverted cone-shaped to small to the transition of outlet air end 32.Described outlet air end 32 passes through
Described bearing main body 1 is extended to outside described bearing main body 1, and air outlet is provided with described outlet air end 32.The collection
Windband 3 one section in the bearing main body 1 is uniformly intensive to be provided with several air-out points 34, in described collection windband 3 uniformly
Be provided with several slideways 37, described slip cap 4 is arranged on described slideway 37, be provided with described slip cap 4 with
The air-out passage that the air-out point 34 matches, the sealing gear being engaged with the air-out point 34 is provided with described air-out passage
42 to be enclosed, endless metal circle 43 is provided with described Sealing shield ring 42, described stating is provided with sealing chute 44 on air-out point 34,
The spacing slideway 45 being engaged with the endless metal circle 43 is provided with sealing chute 44.Activity is set on described air outlet
There are several fan-shaped diaphragm seals 46, sealing rubber cover, described fan-shaped diaphragm seal 46 are enclosed with described fan-shaped diaphragm seal 46
Slip cap 4 is connected by connecting rod 47.Annular groove 33 is provided with described collection windband 3, be provided with described slip cap 4 with
The plectrum 41 that the annular groove 33 is engaged, is additionally provided with back-up ring 35 in described collection windband 3, described back-up ring 35 with it is described
Slip cap 4 between be provided with some springs 36.Uniform circular, which is gone back, on described slip cap 4 is provided with several fixed grooves
63, it is provided with described collection windband 3 and places groove 61, back-moving spring 62 is provided with described placement groove 61, it is described
It is provided with the magnetic patch 64 being engaged with the fixed groove 63 on back-moving spring 62, the axle after the magnetic of the magnetic patch 64 and energization
Main body 1 is held to repel each other.Several ball grooves 38 are evenly arranged with described collection windband 3, are rolled in described ball groove 38
It is provided with the small ball 39 being engaged with the bearing main body 1.Heat dissipation channel 91, institute are additionally provided with described bearing main body 1
The radiating groove 92 being engaged with the heat dissipation channel 91 is provided with the iron core 11 stated, described heat dissipation channel 91 is circumscribed with radiating
Device 9, described heat dissipation channel 91 is interior to have flowable coolant.
The present invention is a kind of magnetic bearing servicing unit, mainly solves magnetic bearing and is lost magnetism in unexpected power-off so that axle 2
The problem of can not stablizing among bearing main body 1.Be provided with to solve this problem present invention on axle 2 airfoil fan 21 with
And it is fixedly installed on the collection windband 3 on axle 2.When axle 2 is run, collect windband 3 and be arranged on collection windband 3 in slip cap 4 all
With high-speed rotation together with axle 2, this is to collect in the presence of the airfoil fan 21 to have high velocity air in windband 3 and pass through, in normal work
When making, high velocity air can enter from air intake 31, be left from outlet air end 32, have no effect on the work of bearing main body 1.As bearing master
When body 1 powers off suddenly, magnetic disappears in bearing main body 1, and the magnetic patch 64 to repel each other with the bearing main body 1 after energization is in back-moving spring 62
In the presence of bounce back, allow magnetic patch 64 depart from fixed groove 63, now whole slip cap 4 slided in the presence of spring 36, pass through
Connecting rod 47 retracts fan-shaped diaphragm seal 46, allows several fan-shaped diaphragm seals 46 to live outlet air end 32 in fan-shaped closure, then by close
Envelope chute 44 allows the movement of block circle 42 to agree with air-out point 34, is not leaked to ensure that block circle 42 agrees with completely with air-out point 34
Gas, then limited location slideway 45 is set in sealing chute 44, endless metal circle 43 is set on block circle 42, endless metal circle 43 exists
In spacing slideway 45, endless metal circle 43 will move in spacing slideway 45 when mobile, and band dynamic sealing chute 44 steadily agrees with
Air-out point 34.Now because fan-shaped diaphragm seal 46 has closed outlet air end 32, the air-flow in collection windband 3 can only be led to by air-out
Road sprays with air-out point 34, and these air-flows ejected are got on bearing main body 1 in the case where axle 2 rotates at a high speed and axle 2 is suspended again
Lift, now can is closed motor and slowed down by axle 2 until stopping, as long as axle 2 there will be jet-impingement always in rotation, making
Will not directly be contacted between axle 2 and bearing main body 1 and larger friction occurs cause damage to axle 2.While in order to ensure
Frictional force is minimum during existing accident, is also evenly arranged with several ball grooves 38 in collection windband 3, is provided with ball groove 38
Small ball 39, sphero-cylindrical lens 81 is provided between described iron core 11, is rolled in described sphero-cylindrical lens 81 and is provided with steel ball ball 82,
Also it is rolling friction rather than the big sliding friction of frictional force after so when going wrong, axle 2 contacts with bearing main body 1.For
The stabilization of bearing main body 1 is kept, heat dissipation channel 91 is also additionally provided with bearing main body 1, is provided with described iron core 11
The radiating groove 92 being engaged with the heat dissipation channel 91, described heat dissipation channel 91 are circumscribed with radiator 9, described heat dissipation channel
There is flowable coolant in 91.Bearing main body 1 is cooled by ceaselessly flowing coolant, absorbed because coil leads to
Heat caused by electricity, keep the working stability of bearing main body 1 not go out and be stopped because of overheat.
Claims (5)
1. a kind of magnetic bearing auxiliary air appliance, including bearing main body, described bearing main body are set on axle, described bearing
Main body can produce gap between described axle at work, it is characterized in that, described axle（2）Upper uniform circular is provided with some
Individual airfoil fan（21）, described axle（2）On be additionally provided with and the airfoil fan（21）The collection windband being engaged（3）, it is described
Collection windband（3）Including air intake（31）And outlet air end（32）, described air intake（31）Wrap described airfoil fan
（21）, described outlet air end（32）Pass through described bearing main body（1）Extend to described bearing main body（1）Outside, described
Outlet air end（32）On be provided with air outlet, the collection windband（3）In the bearing main body（1）Interior one section is uniformly intensive to be provided with
Several air-out points（34）, described collection windband（3）Inside also slide and be provided with slip cap（4）, described slip cap（4）Upper setting
Have and the air-out point（34）The air-out passage of matching, several fan-shaped diaphragm seals are movably set with described air outlet
（46）, described fan-shaped diaphragm seal（46）Pass through connecting rod（47）Connect slip cap（4）, described collection windband（3）On be provided with ring
Connected in star（33）, described slip cap（4）On be provided with and the annular groove（33）The plectrum being engaged（41）, described collection
Windband（3）Inside it is additionally provided with back-up ring（35）, described back-up ring（35）With described slip cap（4）Between be provided with some springs
（36）, described slip cap（4）On go back uniform circular and be provided with several fixed grooves（63）, described collection windband（3）Inside set
It is equipped with placement groove（61）, described placement groove（61）Inside it is provided with back-moving spring（62）, described back-moving spring（62）On
It is provided with and the fixed groove（63）The magnetic patch being engaged（64）, the magnetic patch（64）Magnetic and energization after bearing main body
（1）Repel each other, described collection windband（3）On be evenly arranged with several ball grooves（38）, described ball groove（38）Interior rolling
It is dynamic to be provided with and the bearing main body（1）The small ball being engaged（39）.
2. a kind of magnetic bearing auxiliary air appliance according to claim 1, it is characterized in that, described collection windband（3）It is interior equal
It is even to be provided with several slideways（37）, described slip cap（4）It is arranged on described slideway（37）On.
3. a kind of magnetic bearing auxiliary air appliance according to claim 1, it is characterized in that, set on described air-out passage
Have and the air-out point（34）The Sealing shield ring being engaged（42）.
4. a kind of magnetic bearing auxiliary air appliance according to claim 3, it is characterized in that, described Sealing shield ring（42）On
It is provided with endless metal circle（43）, described air-out point（34）On be provided with and the endless metal circle（43）The sealing being engaged
Chute（45）.
5. a kind of magnetic bearing auxiliary air appliance according to claim 1, it is characterized in that, described fan-shaped diaphragm seal（46）
On be enclosed with sealing rubber cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511000833.9A CN105485165B (en) | 2015-12-28 | 2015-12-28 | A kind of magnetic bearing auxiliary air appliance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511000833.9A CN105485165B (en) | 2015-12-28 | 2015-12-28 | A kind of magnetic bearing auxiliary air appliance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105485165A CN105485165A (en) | 2016-04-13 |
| CN105485165B true CN105485165B (en) | 2018-03-09 |
Family
ID=55672366
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201511000833.9A Expired - Fee Related CN105485165B (en) | 2015-12-28 | 2015-12-28 | A kind of magnetic bearing auxiliary air appliance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105485165B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109707734B (en) * | 2019-01-02 | 2020-05-26 | 江苏理工学院 | An electromagnetic adsorption type bearing protection device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0287440A1 (en) * | 1987-04-09 | 1988-10-19 | Societe Europeenne De Propulsion | Active magnetic bearing with a supplementary supporting bearing |
| EP0341137A1 (en) * | 1988-04-29 | 1989-11-08 | Societe De Mecanique Magnetique S.A. | Arrangement comprising an emergency bearing and a magnetic bearing for a rotary axle |
| US5216308A (en) * | 1989-05-25 | 1993-06-01 | Avcon-Advanced Controls Technology, Inc. | Magnetic bearing structure providing radial, axial and moment load bearing support for a rotatable shaft |
| GB2268984A (en) * | 1992-07-23 | 1994-01-26 | Glacier Metal Co Ltd | Magnetic bearing back-up |
| US6310414B1 (en) * | 1994-06-21 | 2001-10-30 | Rotoflow Corporation | Shaft bearing 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 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004324895A (en) * | 1997-04-28 | 2004-11-18 | Ntn Corp | Static pressure magnetic combined bearing |
| US7736062B2 (en) * | 2007-09-14 | 2010-06-15 | Hamilton Sundstrand Corporation | Auxiliary rotary bearing system |
| US8994237B2 (en) * | 2010-12-30 | 2015-03-31 | Dresser-Rand Company | Method for on-line detection of liquid and potential for the occurrence of resistance to ground faults in active magnetic bearing systems |
-
2015
- 2015-12-28 CN CN201511000833.9A patent/CN105485165B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0287440A1 (en) * | 1987-04-09 | 1988-10-19 | Societe Europeenne De Propulsion | Active magnetic bearing with a supplementary supporting bearing |
| EP0341137A1 (en) * | 1988-04-29 | 1989-11-08 | Societe De Mecanique Magnetique S.A. | Arrangement comprising an emergency bearing and a magnetic bearing for a rotary axle |
| US5216308A (en) * | 1989-05-25 | 1993-06-01 | Avcon-Advanced Controls Technology, Inc. | Magnetic bearing structure providing radial, axial and moment load bearing support for a rotatable shaft |
| GB2268984A (en) * | 1992-07-23 | 1994-01-26 | Glacier Metal Co Ltd | Magnetic bearing back-up |
| US6310414B1 (en) * | 1994-06-21 | 2001-10-30 | Rotoflow Corporation | Shaft bearing 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 |
|---|---|
| CN105485165A (en) | 2016-04-13 |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200414 Address after: 423, floor 4, block a, Xinhua future city building, No. 175, Litang Road, Changping District, Beijing 102200 Patentee after: Li Qiannan Address before: Creek Town Fengming road Zhenhai District 315200 Zhejiang city of Ningbo province No. 666 Patentee before: NINGBO DAFEN SEIKO BEARING Co.,Ltd. |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200428 Address after: Wei Seng Zhai Zhen Qian Fu Du Cun, Guantao County, Handan City, Hebei Province Patentee after: Guantao three power bearing manufacturing Co.,Ltd. Address before: 423, floor 4, block a, Xinhua future city building, No. 175, Litang Road, Changping District, Beijing 102200 Patentee before: Li Qiannan |
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| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180309 Termination date: 20211228 |
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| CF01 | Termination of patent right due to non-payment of annual fee |