CN101521426A - Shaft current prevention device for large and medium-sized motor bearing and manufacturing method thereof - Google Patents
Shaft current prevention device for large and medium-sized motor bearing and manufacturing method thereof Download PDFInfo
- Publication number
- CN101521426A CN101521426A CN200910038412A CN200910038412A CN101521426A CN 101521426 A CN101521426 A CN 101521426A CN 200910038412 A CN200910038412 A CN 200910038412A CN 200910038412 A CN200910038412 A CN 200910038412A CN 101521426 A CN101521426 A CN 101521426A
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- China
- Prior art keywords
- bearing
- medium
- shaft current
- medium motor
- current device
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 7
- 230000002265 prevention Effects 0.000 title 1
- 238000005096 rolling process Methods 0.000 claims abstract description 8
- 230000004888 barrier function Effects 0.000 claims description 13
- 238000009413 insulation Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 238000005524 ceramic coating Methods 0.000 claims description 3
- 229910010293 ceramic material Inorganic materials 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 3
- 239000011247 coating layer Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 3
- 230000003746 surface roughness Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 2
- 230000002349 favourable effect Effects 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 abstract description 2
- 238000002360 preparation method Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
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- Rolling Contact Bearings (AREA)
Abstract
The shaft current preventing device for the large and medium motor bearing comprises a rotating shaft sleeved with a bearing, and an insulating layer is arranged at a bearing stop on the rotating shaft. The thickness of the insulating layer is more than or equal to 0.6 mm. The invention thoroughly solves the problem of faults of the large and medium-sized motor caused by the damage of the bearing caused by the shaft current because the shaft current passes through the bearing to form a loop, and improves the safety performance of the large and medium-sized motor; especially, after the large and medium-sized motors adopt rolling bearings, the manufacturing cost and the operation and maintenance cost of the large and medium-sized motors are directly reduced, the volume of the whole machine is reduced, a favorable foundation is laid for the smooth development of the large and medium-sized motors, and certain economic benefits and social benefits are achieved.
Description
Technical field
The present invention relates to a kind of anti-shaft current device that is used for the large and medium motor bearing and preparation method thereof.
Background technology
In common motor structural design in the past, seat No. H500 and following middle-size and small-size motor all adopt rolling bearing, because the electromagnetic circuit symmetry of motor itself, the shaft current that can not produce shaft current or generation is very small, be not enough to rolling bearing is constituted damage, so generally needn't take insulation measures to seat No. H500 and following middle-size and small-size motor rolling bearing.
Seat No. H560 and above large and medium motor adopt sliding bearing substantially; adopt erose stator punching or adopt fan-shaped assembly sheet because large and medium motor more; perhaps because mismachining tolerance; cause electromagnetic circuit asymmetric easily; and then the bigger shaft current of generation; in order to protect sliding bearing and relevant bush seat and bearing shell thereof, on bush seat, be stained with the insulating barrier that materials such as polytetrafluoroethylene are done, be used to block shaft current.Because sliding bearing must supportingly have lubricating oil system when using, it causes volume increase, cost of manufacture increase, operation and the maintenance cost of large and medium motor to increase, and comparatively trouble is installed also.
Summary of the invention
Purpose of the present invention aim to provide a kind of simple and reasonable, volume is little, cost of manufacture is low, safe and reliable, the protection bearing is not subjected to shaft current damage, realize that rotating shaft and bearing precision cooperate be used for anti-shaft current device of large and medium motor bearing and preparation method thereof, to overcome weak point of the prior art.
A kind of anti-shaft current device that is used for the large and medium motor bearing by this purpose design comprises the rotating shaft that is socketed with bearing, it is characterized in that the bearing guard place in the rotating shaft is provided with insulating barrier.
The thickness of described insulating barrier is more than or equal to 0.6mm.Insulating barrier is Al
2O
3-TO
2Or Al
2O
3Ceramic coating.The surface roughness of insulating barrier is 0.8.
Described bearing is rolling bearing or sliding bearing.
A kind of manufacture method that is used for the anti-shaft current device of large and medium motor bearing is characterized in that the bearing guard place in rotating shaft adopts plasma thermal sprayed technology to spray, and coating layer thickness is more than or equal to 0.6mm, and coating material is Al
2O
3-TO
2Or Al
2O
3Ceramic material, to having realized insulation between whole bearing and bearing pedestal, the bearing cap, blocking-up forms the electric current in loop through bearing fully.
The present invention has thoroughly solved large and medium motor and has formed the loop because of shaft current through bearing, and bearing is subjected to the shaft current damage and the problem of the fault that occurs, has improved the security performance of large and medium motor; Particularly after large and medium motor adopts rolling bearing, exempted and adopted the necessary supporting lubricating oil system of sliding bearing, thereby large and medium motor cost of manufacture and operation expense have directly been reduced, reduced machine volume, establish favourable basis for large and medium motor shapes up, had certain economic benefits and social benefit.
Description of drawings
Fig. 1 is one embodiment of the invention broken section structural representation.
Fig. 2 is the A place structure for amplifying schematic diagram among Fig. 1.
Fig. 3 is the B place structure for amplifying schematic diagram among Fig. 1.
Embodiment
Below in conjunction with drawings and Examples the present invention is further described.
Referring to Fig. 1-Fig. 3, originally be used for the anti-shaft current device of large and medium motor bearing, comprise the rotating shaft 1 that is socketed with bearing, the bearing guard place in the rotating shaft is provided with insulating barrier 1.1.The thickness of insulating barrier is more than or equal to 0.6mm, and insulating barrier 1.1 is Al
2O
3-TO
2Or Al
2O
3Ceramic coating.The surface roughness of insulating barrier 1.1 is 0.8.Bearing is rolling bearing or sliding bearing.
During making, the bearing guard place in rotating shaft 1 adopts plasma thermal sprayed technology to spray, and coating material is Al
2O
3-TO
2Or Al
2O
3Ceramic material, coating layer thickness are worked into designated precision and size then more than or equal to 0.6mm, carry out the bearing assembling after measurement insulation resistance is qualified.To having realized insulation between whole bearing and bearing pedestal, the bearing cap, blocking-up forms the electric current in loop through bearing fully.
Though the present invention describes with reference to the above embodiments; but those of ordinary skill in the art; will be appreciated that above example only is to be used for illustrating the present invention; should understand and wherein can make variations and modifications and do not break away from the present invention in a broad sense; so be not as limitation of the invention; as long as in connotation scope of the present invention, to the variation of above-described embodiment, the protection range that distortion all will fall into claim of the present invention.
Claims (6)
1. an anti-shaft current device that is used for the large and medium motor bearing comprises the rotating shaft (1) that is socketed with bearing, it is characterized in that the bearing guard place in the rotating shaft is provided with insulating barrier (1.1).
2. the anti-shaft current device that is used for the large and medium motor bearing according to claim 1, the thickness that it is characterized in that described insulating barrier (1.1) is more than or equal to 0.6mm.
3. the anti-shaft current device that is used for the large and medium motor bearing according to claim 2 is characterized in that described insulating barrier (1.1) is Al
2O
3-T
iO
2Or Al
2O
3Ceramic coating.
4. the anti-shaft current device that is used for the large and medium motor bearing according to claim 3, the surface roughness that it is characterized in that described insulating barrier (1.1) is 0.8.
5. the anti-shaft current device that is used for the large and medium motor bearing according to claim 1 is characterized in that described bearing is rolling bearing or sliding bearing.
6. a manufacture method that is used for the anti-shaft current device of large and medium motor bearing according to claim 1 is characterized in that the bearing guard place in rotating shaft adopts plasma thermal sprayed technology to spray, and coating layer thickness is more than or equal to 0.6mm, and coating material is Al
2O
3-T
iO
2Or Al
2O
3Ceramic material, to having realized insulation between whole bearing and bearing pedestal, the bearing cap, blocking-up forms the electric current in loop through bearing fully.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910038412A CN101521426A (en) | 2009-03-30 | 2009-03-30 | Shaft current prevention device for large and medium-sized motor bearing and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910038412A CN101521426A (en) | 2009-03-30 | 2009-03-30 | Shaft current prevention device for large and medium-sized motor bearing and manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101521426A true CN101521426A (en) | 2009-09-02 |
Family
ID=41081847
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910038412A Pending CN101521426A (en) | 2009-03-30 | 2009-03-30 | Shaft current prevention device for large and medium-sized motor bearing and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101521426A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102624137A (en) * | 2010-10-01 | 2012-08-01 | 阿尔斯通运输股份有限公司 | Rolling bearing protection device |
| CN102751835A (en) * | 2011-04-19 | 2012-10-24 | 郑福民 | Brushless DC motor |
| CN102966673A (en) * | 2012-12-04 | 2013-03-13 | 普光新高（北京）技术开发有限公司 | Electric-isolation rotating shaft device |
| CN109193981A (en) * | 2018-08-24 | 2019-01-11 | 田振荣 | Axial excitation driving motor |
| EP4262063A4 (en) * | 2021-01-15 | 2024-06-12 | Huawei Digital Power Technologies Co., Ltd. | Electric motor shaft, electric motor and electric vehicle |
-
2009
- 2009-03-30 CN CN200910038412A patent/CN101521426A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102624137A (en) * | 2010-10-01 | 2012-08-01 | 阿尔斯通运输股份有限公司 | Rolling bearing protection device |
| CN102751835A (en) * | 2011-04-19 | 2012-10-24 | 郑福民 | Brushless DC motor |
| CN102966673A (en) * | 2012-12-04 | 2013-03-13 | 普光新高（北京）技术开发有限公司 | Electric-isolation rotating shaft device |
| CN109193981A (en) * | 2018-08-24 | 2019-01-11 | 田振荣 | Axial excitation driving motor |
| EP4262063A4 (en) * | 2021-01-15 | 2024-06-12 | Huawei Digital Power Technologies Co., Ltd. | Electric motor shaft, electric motor and electric vehicle |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090902 |