CN108825667B - Cooling device for magnetic axial bearing - Google Patents
Cooling device for magnetic axial bearing Download PDFInfo
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- CN108825667B CN108825667B CN201810887358.9A CN201810887358A CN108825667B CN 108825667 B CN108825667 B CN 108825667B CN 201810887358 A CN201810887358 A CN 201810887358A CN 108825667 B CN108825667 B CN 108825667B
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- power supply
- cooling
- transmission
- control box
- cooling device
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- 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
- F16C37/00—Cooling of bearings
- F16C37/005—Cooling of bearings of magnetic bearings
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- 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
Abstract
The invention discloses a cooling device for a magnetic axial bearing, which structurally comprises a device protective shell, a rotating shaft main body, a bottom fixed seat and a cooling control box, wherein the device protective shell is provided with a top hanging ring, a bearing main body and a fixing bolt, the bottom fixed seat is provided with a transmission motor, a power supply connecting plate and a motor controller, and the cooling control box is provided with a lead screw transmission device, a first power supply device, a second power supply device and a cooling device, and the cooling device has the beneficial effects that: can drive the connection of inner circuit through the rotation of pivot self to make cooling device work, the cooling effect is quick effective, avoids the bearing inner race to become flexible with the axle because of the thermal energy, and the outer lane influences the axial of bearing because of the thermal energy and moves about, practices thrift the processing cost.
Description
Technical Field
The invention relates to the field of cooling devices, in particular to a cooling device for a magnetic axial bearing.
Background
The bearing industrial manufacturing process and process equipment in China are slow in technical development, the turning numerical control rate is low, the grinding automation level is low, only 200 automatic production lines exist in China, advanced heat treatment processes and equipment which are critical to the service life and reliability of bearings are low in coverage rate such as controlled atmosphere protection heating, double refining, bainite quenching and the like, many technical problems cannot be overcome, research and development of new bearing steel grades, improvement of steel quality, research and development of related technologies such as lubrication, cooling, cleaning, grinding materials and grinding tools cannot meet the requirements of bearing product level and quality improvement.
At present, in the pump industry, two main lubrication modes of a bearing are grease lubrication and oil bath lubrication, wherein the grease lubrication is mainly used for conveying a medium with a low medium temperature, and the temperature of the conveying medium is higher than 85 ℃, so that the equipment can stably run only by adopting the oil bath lubrication.
At present, because the working condition of a pump is severe and the pump continuously operates for 24 hours, conveying media are high-temperature, corrosive and abrasive media, heat is often transmitted to a bearing through a shaft, particularly the pump with a large bearing diameter, the temperature of the bearing part is high, the temperature of lubricating oil is also increased, the temperature of the bearing is increased, the inner ring of the bearing is loosened from the shaft due to thermal expansion, the axial movement of the bearing is influenced by the thermal expansion of the outer ring, and the bearing operates in a high-temperature state for a long time, so that the service life of the whole machine is influenced, and the maintenance cost is increased.
Disclosure of Invention
The main object of the present invention is to overcome the drawbacks of the prior art and to provide a cooling device for magnetic axial bearings.
The invention is realized by adopting the following technical scheme: a cooling device for a magnetic axial bearing structurally comprises a device protective shell, a rotating shaft main body, a bottom fixed seat and a cooling control box, wherein the device protective shell is connected above the bottom fixed seat in a riveting mode through bolts; the bottom fixing seat is provided with a transmission motor, a power supply connecting plate and a motor controller, the transmission motor is connected to the inner bottom surface of the bottom fixing seat in a riveting mode through bolts, the power supply connecting plate is connected to the same horizontal plane through bolts and the transmission motor in a riveting mode, and the motor controller is connected to the side face of the power supply connecting plate through bolts in a riveting mode; the cooling control box is provided with a lead screw transmission device, a first power supply device, a second power supply device and a cooling device, the lead screw transmission device is connected between the first power supply device and the second power supply device through threaded engagement, the lead screw transmission device is connected below the cooling device through threaded engagement, the first power supply device is connected to the inner wall of the cooling control box through bolt riveting, the second power supply device is connected to the inner wall of the other side of the cooling control box through bolt riveting, and the cooling device is connected to the upper portions of the first power supply device and the second power supply device through bolt riveting.
Preferably, the power supply connecting plate is provided with a first electrifying groove and a second electrifying groove, the first electrifying groove is embedded in the upper surface of the power supply connecting plate, and the second electrifying groove and the first electrifying groove are embedded in the same horizontal plane.
As an optimization, the screw transmission device is provided with a connecting rotating rod, a triggering rotating plate, a transmission screw shaft sleeve, a transmission screw, a ball connecting rod, a first electrified small ball and a second electrified small ball, the connecting rotating rod is connected between the cooling device and the transmission screw shaft sleeve through threaded engagement, and the triggering rotating plate is vertically welded on the outer surface of the connecting rotating rod.
As optimization, the driving screw shaft sleeve is connected between the connecting rotating rod and the driving screw through thread engagement, the driving screw is connected between the driving screw shaft sleeve and the ball connecting rod through thread engagement, the ball connecting rod is perpendicularly welded between the first electrified small ball and the second electrified small ball, the first electrified small ball is perpendicularly welded at one end of the ball connecting rod, and the second electrified small ball is perpendicularly welded at the other end of the ball connecting rod.
Preferably, the first power supply device is provided with a first connecting rod, a first connecting lead, a first lead screw shaft sleeve, a first transmission lead screw, a first power contact block, a first sliding guide rail and a first power supply block, the first connecting rod is vertically welded to the side face of the first power contact block, and the first connecting lead is electrically connected between the first power contact block and the cooling device.
Preferably, the first screw shaft sleeve is vertically welded on the inner wall of the cooling control box, the first transmission screw rod is connected onto the first screw shaft sleeve through threaded engagement, the first electrifying contact block is vertically welded at one end of the first transmission screw rod, the first sliding guide rail is connected onto the inner wall of the cooling control box through bolts in a riveting mode, and the first power supply block is connected onto the inner wall of the cooling control box through bolts in a riveting mode.
Preferably, the second power supply device is provided with a second connecting rod, a second connecting wire, a second screw rod shaft sleeve, a second transmission screw rod, a second power contact block, a second sliding guide rail and a second power supply block, the second connecting rod is vertically welded on the side face of the second power contact block, and the second connecting wire is electrically connected between the second power contact block and the cooling device.
Preferably, the second screw shaft sleeve is vertically welded on the inner wall of the cooling control box, the second transmission screw is connected to the second screw shaft sleeve through threaded engagement, the second electrifying contact block is vertically welded at one end of the second transmission screw, the second sliding guide rail is connected to the inner wall of the cooling control box through bolts in a riveting mode, and the second power supply block is connected to the inner wall of the cooling control box through bolts in a riveting mode.
As optimization, cooling device is equipped with condenser pipe controller, rotatory universal seat, first condenser pipe, second condenser pipe, the condenser pipe controller is connected in rotatory universal seat bottom with magnetic adsorption's mode, rotatory universal seat inlays to be located between pivot main part and the condenser pipe controller, the even equidistance of first condenser pipe inlays to be located condenser pipe controller one side, the even equidistance of second condenser pipe inlays to be located condenser pipe controller opposite side.
Advantageous effects
When the cooling device for the magnetic axial bearing works, the screw transmission device is arranged, and the screw transmission device is provided with the connecting rotating rod, the triggering rotating plate, the transmission screw shaft sleeve, the transmission screw, the ball connecting rod, the first electrified small ball and the second electrified small ball; when the rotating plate is triggered to rotate, the first driving screw rod is pushed to horizontally move on the first sliding guide rail, so that the first electrified contact block is driven to horizontally move and is connected with the first power supply block to be communicated with a circuit of the cooling device, and the cooling device works; when the rotating plate is triggered to rotate, the second transmission lead screw is pushed to horizontally move on the second sliding guide rail, so that the second electrifying contact block is driven to horizontally move and is connected with the second power supply block to be communicated with a circuit of the cooling device, and the cooling device works; through being equipped with a cooling device, cooling device is equipped with condenser pipe controller, rotatory universal seat, first condenser pipe, second condenser pipe, and when the circuit intercommunication, the condenser pipe controller refrigerates fast to make first condenser pipe and second condenser pipe carry out work, carry out the rapid cooling.
Compared with the prior art, the invention has the beneficial effects that: can drive the connection of inner circuit through the rotation of pivot self to make cooling device work, the cooling effect is quick effective, avoids the bearing inner race to become flexible with the axle because of the thermal energy, and the outer lane influences the axial of bearing because of the thermal energy and moves about, practices thrift the processing cost.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
fig. 1 is a schematic structural diagram of a cooling device for a magnetic axial bearing according to the present invention.
Fig. 2 is a schematic structural diagram of a cooling device for a magnetic axial bearing according to the present invention in an operating state.
Fig. 3 is a schematic structural view of the lead screw transmission device in a static state.
Fig. 4 is a schematic structural view of the screw drive device in a working state.
Fig. 5 is a schematic structural diagram of the cooling control box in a static state.
Fig. 6 is a schematic structural diagram of the cooling control box in an operating state according to the present invention.
Fig. 7 is a schematic side view of a first power supply device according to the present invention.
Fig. 8 is a schematic side view of a second power supply device according to the present invention.
In the figure: the device comprises a device protection shell 1, a rotating shaft main body 2, a bottom fixed seat 3, a cooling control box 4, a top hanging ring 10, a bearing main body 11, a fixing bolt 12, a transmission motor 30, a power supply connecting plate 31, a first electrifying groove 310, a second electrifying groove 311, a motor controller 32, a screw rod transmission device 40, a connecting rotating rod 400, a trigger rotating plate 401, a transmission screw shaft sleeve 402, a transmission screw 403, a ball connecting rod 404, a first electrified small ball 405, a second electrified small ball 406, a first power supply device 41, a first connecting rod 410, a first connecting lead wire 411, a first screw shaft sleeve 412, a first transmission screw 413, a first electrifying contact block 414, a first sliding guide rail 415, a first power supply block 416, a second power supply device 42, a second connecting rod 420, a second connecting lead wire 421, a second screw shaft sleeve 422, a second transmission screw rod 423, a second electrifying contact block 424, a second sliding guide rail 425, a second power supply block 426, The cooling device 43, the condenser tube controller 430, the rotary universal base 431, the first condenser tube 432 and the second condenser tube 433.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-8, the present invention provides a cooling device for a magnetic axial bearing, comprising: the cooling device structurally comprises a device protective shell 1, a rotating shaft main body 2, a bottom fixed seat 3 and a cooling control box 4, wherein the device protective shell 1 is connected above the bottom fixed seat 3 in a riveting mode through bolts, the rotating shaft main body 2 is embedded in the device protective shell 1, the bottom fixed seat 3 is connected below the rotating shaft main body 2 in a riveting mode through bolts, the cooling control box 4 is embedded in the bottom fixed seat 3, the device protective shell 1 is provided with a top hanging ring 10, a bearing main body 11 and a fixing bolt 12, the top hanging ring 10 is connected to the top of the device protective shell 1 in a riveting mode through bolts, the bearing main body 11 is embedded between the rotating shaft main body 2 and the device protective shell 1, and the fixing bolt 12 is connected to the side surface of the bottom fixed seat 3 in a threaded engagement; the bottom fixed seat 3 is provided with a transmission motor 30, a power supply connecting plate 31 and a motor controller 32, the transmission motor 30 is connected to the bottom surface inside the bottom fixed seat 3 in a riveting mode through bolts, the power supply connecting plate 31 is connected to the transmission motor 30 in a riveting mode through bolts on the same horizontal plane, and the motor controller 32 is connected to the side surface of the power supply connecting plate 31 in a riveting mode through bolts; the cooling control box 4 is provided with a screw rod transmission device 40, a first power supply device 41, a second power supply device 42 and a cooling device 43, the screw rod transmission device 40 is connected between the first power supply device 41 and the second power supply device 42 through threaded engagement, the screw rod transmission device 40 is connected below the cooling device 43 through threaded engagement, the first power supply device 41 is connected to the inner wall of the cooling control box 4 through bolt riveting, the second power supply device 42 is connected to the inner wall of the other side of the cooling control box 4 through bolt riveting, the cooling device 43 is connected above the first power supply device 41 and the second power supply device 42 through bolt riveting, the power supply connecting plate 31 is provided with a first electrifying groove 310 and a second electrifying groove 311, the first electrifying groove 310 is embedded on the upper surface of the power supply connecting plate 31, the second electrifying groove 311 and the first electrifying groove 310 are embedded on the same horizontal plane, the screw transmission device 40 is provided with a connecting rotating rod 400, a triggering rotating plate 401, a transmission screw shaft sleeve 402, a transmission screw 403, a round ball connecting rod 404, a first electrified small round ball 405 and a second electrified small round ball 406, the connecting rotating rod 400 is connected between the cooling device 43 and the transmission screw shaft sleeve 402 through threaded engagement, the triggering rotating plate 401 is vertically welded on the outer surface of the connecting rotating rod 400, the transmission screw shaft sleeve 402 is connected between the connecting rotating rod 400 and the transmission screw 403 through threaded engagement, the transmission screw 403 is connected between the transmission screw shaft sleeve 402 and the round ball connecting rod 404 through threaded engagement, the round ball connecting rod 404 is vertically welded between the first electrified small round ball 405 and the second electrified small round ball 406, the first electrified small round ball 405 is vertically welded at one end of the round ball connecting rod 404, the second electrified small round ball is vertically welded at the other end of the round ball connecting rod 404, the first power supply device 41 is provided with a first connecting rod 410, a first connecting lead 411, a first lead screw shaft sleeve 412, a first transmission lead screw 413, a first electrifying contact block 414, a first sliding guide rail 415 and a first power supply block 416, wherein the first connecting rod 410 is vertically welded on the side surface of the first electrifying contact block 414, the first connecting lead 411 is electrically connected between the first electrifying contact block 414 and the cooling device 43, the first lead screw shaft sleeve 412 is vertically welded on the inner wall of the cooling control box 4, the first transmission lead screw 413 is connected on the first lead screw shaft sleeve 412 in a threaded engagement manner, the first electrifying contact block 414 is vertically welded at one end of the first transmission lead screw 413, the first sliding guide rail 415 is riveted on the inner wall of the cooling control box 4 through a bolt, the first power supply block 416 is riveted on the inner wall of the cooling control box 4 through a bolt, the second power supply device 42 is provided with a second connecting rod 420, a first connecting lead screw rod 416, a first transmission lead screw and a second, The second connecting wire 421, the second screw shaft sleeve 422, the second transmission screw 423, the second current contact block 424, the second sliding guide rail 425 and the second power supply block 426, the second connecting rod 420 is vertically welded on the side surface of the second current contact block 424, the second connecting wire 421 is electrically connected between the second current contact block 424 and the cooling device 43, the second screw shaft sleeve 422 is vertically welded on the inner wall of the cooling control box 4, the second transmission screw 423 is connected on the second screw shaft sleeve 422 through threaded engagement, the second current contact block 424 is vertically welded at one end of the second transmission screw 423, the second sliding guide rail 425 is connected on the inner wall of the cooling control box 4 through bolt riveting, the second power supply block 426 is connected on the inner wall of the cooling control box 4 through bolt riveting, the cooling device 43 is provided with a condensation pipe controller 430, a rotary universal seat 431, a first condensation pipe 432, and a rotary universal seat 431 are arranged on the inner wall of the cooling control box 4, The second condenser pipe 433, the condenser pipe controller 430 is connected in rotatory universal seat 431 bottom with magnetic adsorption's mode, rotatory universal seat 431 inlays to be located between pivot main part 2 and the condenser pipe controller 430, the even equidistance of first condenser pipe 432 inlays to be located condenser pipe controller 430 one side, the even equidistance of second condenser pipe 433 inlays to be located condenser pipe controller 430 opposite side.
When the cooling device is used, the rotating shaft main body 2 drives the screw rod transmission device 40 to rotate in the rotating process, the screw rod transmission device 40 pushes the first power supply device 41 and the second power supply device 42 to move when rotating, so that the cooling device 43 is connected with a power supply, the cooling device 43 is enabled to carry out cooling work, meanwhile, when the screw rod transmission device 40 rotates, the transmission screw rod 403 is pushed to extend downwards, so that the first electrified small ball 405 and the second electrified small ball 406 are respectively embedded into the first electrified groove 310 and the second electrified groove 311, a circuit is connected, and the motor is enabled to carry out auxiliary work under the control of the motor controller 32.
Compared with the prior art, the invention has the technical progress that: can drive the connection of inner circuit through the rotation of pivot self to make cooling device work, the cooling effect is quick effective, avoids the bearing inner race to become flexible with the axle because of the thermal energy, and the outer lane influences the axial of bearing because of the thermal energy and moves about, practices thrift the processing cost.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.
Claims (9)
1. The utility model provides a cooling device for magnetic force axial bearing, its structure includes device protecting sheathing, pivot main part, bottom fixing base, cooling control box, the device protecting sheathing passes through the bolt riveting and connects in bottom fixing base top, the pivot main part inlays to be located inside the device protecting sheathing, the bottom fixing base passes through the bolt riveting and connects in pivot main part below, inside the cooling control box inlays to be located bottom fixing base, its characterized in that: the device protection shell is provided with a top hanging ring, a bearing main body and a fixing bolt, the top hanging ring is connected to the top of the device protection shell in a riveting mode through the bolt, the bearing main body is embedded between the rotating shaft main body and the device protection shell, and the fixing bolt is connected to the side surface of the bottom fixed seat in a threaded engagement mode; the bottom fixing seat is provided with a transmission motor, a power supply connecting plate and a motor controller, the transmission motor is connected to the inner bottom surface of the bottom fixing seat in a riveting mode through bolts, the power supply connecting plate is connected to the same horizontal plane through bolts and the transmission motor in a riveting mode, and the motor controller is connected to the side face of the power supply connecting plate through bolts in a riveting mode; the cooling control box is provided with a lead screw transmission device, a first power supply device, a second power supply device and a cooling device, the lead screw transmission device is connected between the first power supply device and the second power supply device through threaded engagement, the lead screw transmission device is connected below the cooling device through threaded engagement, the first power supply device is connected to the inner wall of the cooling control box through bolt riveting, the second power supply device is connected to the inner wall of the other side of the cooling control box through bolt riveting, and the cooling device is connected to the upper portions of the first power supply device and the second power supply device through bolt riveting.
2. A cooling device for a magnetic axial bearing according to claim 1, characterized in that: the power supply connecting plate is provided with a first electrifying groove and a second electrifying groove, the first electrifying groove is embedded in the upper surface of the power supply connecting plate, and the second electrifying groove and the first electrifying groove are embedded in the same horizontal plane.
3. A cooling device for a magnetic axial bearing according to claim 1, characterized in that: the screw transmission device is provided with a connecting rotating rod, a triggering rotating plate, a transmission screw shaft sleeve, a transmission screw, a ball connecting rod, a first electrified small ball and a second electrified small ball, the connecting rotating rod is connected between the cooling device and the transmission screw shaft sleeve through threaded engagement, and the triggering rotating plate is vertically welded on the outer surface of the connecting rotating rod.
4. A cooling device for a magnetic axial bearing according to claim 3, characterized in that: the ball connecting rod is perpendicularly welded between a first electrified small ball and a second electrified small ball, the first electrified small ball is perpendicularly welded at one end of the ball connecting rod, and the second electrified small ball is perpendicularly welded at the other end of the ball connecting rod.
5. A cooling device for a magnetic axial bearing according to claim 1, characterized in that: the first power supply device is provided with a first connecting rod, a first connecting lead, a first lead screw shaft sleeve, a first transmission lead screw, a first electrified contact block, a first sliding guide rail and a first power supply block, wherein the first connecting rod is vertically welded on the side surface of the first electrified contact block, and the first connecting lead is electrically connected between the first electrified contact block and the cooling device.
6. A cooling arrangement for a magnetic axial bearing according to claim 5, characterized in that: the first screw shaft sleeve is vertically welded on the inner wall of the cooling control box, the first transmission screw rod is connected onto the first screw shaft sleeve in a threaded engagement mode, the first electrifying contact block is vertically welded at one end of the first transmission screw rod, the first sliding guide rail is connected onto the inner wall of the cooling control box in a riveting mode through a bolt, and the first power supply block is connected onto the inner wall of the cooling control box in a riveting mode through a bolt.
7. A cooling device for a magnetic axial bearing according to claim 1, characterized in that: the second power supply device is provided with a second connecting rod, a second connecting wire, a second screw rod shaft sleeve, a second transmission screw rod, a second power contact block, a second sliding guide rail and a second power supply block, the second connecting rod is vertically welded on the side face of the second power contact block, and the second connecting wire is electrically connected between the second power contact block and the cooling device.
8. A cooling arrangement for a magnetic axial bearing according to claim 7, characterized in that: the second screw shaft sleeve is vertically welded on the inner wall of the cooling control box, the second transmission screw is connected to the second screw shaft sleeve through threaded engagement, the second electrifying contact block is vertically welded at one end of the second transmission screw, the second sliding guide rail is connected to the inner wall of the cooling control box through bolts in a riveting mode, and the second power supply block is connected to the inner wall of the cooling control box through bolts in a riveting mode.
9. A cooling device for a magnetic axial bearing according to claim 1, characterized in that: the cooling device is provided with a condenser pipe controller, a rotary universal seat, a first condenser pipe and a second condenser pipe, wherein the condenser pipe controller is connected to the bottom of the rotary universal seat in a magnetic adsorption mode, the rotary universal seat is embedded between the rotary shaft body and the condenser pipe controller, the first condenser pipe is embedded to one side of the condenser pipe controller at an even equal distance, and the second condenser pipe is embedded to the other side of the condenser pipe controller at an even equal distance.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810887358.9A CN108825667B (en) | 2018-08-06 | 2018-08-06 | Cooling device for magnetic axial bearing |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810887358.9A CN108825667B (en) | 2018-08-06 | 2018-08-06 | Cooling device for magnetic axial bearing |
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| CN108825667A CN108825667A (en) | 2018-11-16 |
| CN108825667B true CN108825667B (en) | 2020-05-08 |
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| US4322030A (en) * | 1979-03-14 | 1982-03-30 | Beckman Instruments, Inc. | Lubrication and cooling system for a high speed ultracentrifuge drive assembly |
| KR101464705B1 (en) * | 2013-11-21 | 2014-12-12 | 차진호 | Blower motor having bearing air cooling structure |
| CN108291649B (en) * | 2015-11-11 | 2020-08-11 | 日本伊格尔博格曼有限公司 | Magnetic fluid seal |
| CN207218506U (en) * | 2017-08-17 | 2018-04-10 | 宁夏天地奔牛实业集团有限公司 | Drag conveyor water-cooled overload protection soft start permanent magnetic device |
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Effective date of registration: 20200414 Address after: 314200 floor 1, inner North building, No.111 Jiulong Road, Caoqiao street, Pinghu City, Jiaxing City, Zhejiang Province Applicant after: Zhejiang Fuku Industrial Technology Co., Ltd Address before: 454450 28 southeast street, Jinliang village, Jincheng Township, Boai County, Jiaozuo, Henan Applicant before: Chen Weiwei |
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