CN105811638A - Method for suppressing shaft currents for motor bearings - Google Patents
Method for suppressing shaft currents for motor bearings Download PDFInfo
- Publication number
- CN105811638A CN105811638A CN201610370917.XA CN201610370917A CN105811638A CN 105811638 A CN105811638 A CN 105811638A CN 201610370917 A CN201610370917 A CN 201610370917A CN 105811638 A CN105811638 A CN 105811638A
- Authority
- CN
- China
- Prior art keywords
- motor
- motor bearings
- bearings
- shaft currents
- shaft
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/163—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields radially supporting the rotary shaft at only one end of the rotor
Abstract
The invention discloses a method for suppressing shaft currents for motor bearings.The method includes steps of manufacturing bearing housings on end covers of motors by means of machining and plating Teflon coatings on the inner surfaces of the bearing housings; assembling to-be-mounted motor shafts and the motor bearings with one another; assembling the motor shafts and the motor bearings which are assembled with one another in the bearing housings on the end covers of the motors.The method has the advantage that electric erosion of the bearings due to the shaft currents can be effectively prevented.
Description
Technical field
The present invention relates to a kind of method, in particular, relate to the suppressing method of a kind of motor bearings shaft current.
Background technology
Along with the development of ac variable speed technology, alternating-current variable frequency motor driveability significantly improves, but meanwhile, the negative effect that frequency conversion speed-adjusting system brings also manifests gradually.Under the effect of powder inverter common-mode voltage, through the coupling of motor internal electric capacity, motor shaft creates shaft voltage.When shaft voltage is more than bearing grease insulation voltage marginal value, bearing will produce destructive shaft current.Owing to shaft current is taken turns and during the contact portion flowing of rolling element at the raceway of cycle rotation, sending spark by very thin lubricating oil film, there is the melted of local and concavo-convex waits galvano-cautery phenomenon in its surface.Motor long-play, can produce bigger vibrations and noise, affects the normal operation of motor.The insulation bearing cost existed on market is high, expensive.
Summary of the invention
The invention aims to overcome deficiency of the prior art, it is provided that the suppressing method of a kind of motor bearings shaft current, it is possible to be prevented effectively from the shaft current galvano-cautery to bearing.
It is an object of the invention to be achieved through the following technical solutions.
The suppressing method of a kind of motor bearings shaft current of the present invention, comprises the following steps:
(1) on electric motor end cap, bearing chamber is processed；
(2) plating of the bearing chamber inner surface in above-mentioned steps (1) teflon coatings；
(3) motor shaft to be installed and motor bearings are fitted together；
(4) by the motor shaft fitted together in step (3) and motor bearings, it is assemblied in the bearing chamber of electric motor end cap.
The thickness of the teflon coatings in described step (2) is set to 0.4mm-0.6mm.
The thickness of the teflon coatings in described step (2) is set to 0.5mm.
Compared with prior art, technical scheme is had the benefit that
In the present invention, the bearing chamber inner surface at electric motor end cap plates teflon coatings, can be prevented effectively from the shaft current galvano-cautery to bearing, it is achieved the function of electric insulation bearing；It addition, the present invention is simple to operate, with low cost.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of electric motor end cap provided by the invention and bearing chamber.
Accompanying drawing labelling: 1 electric motor end cap；2 bearing chambers.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described.
A kind of suppressing method of the motor bearings shaft current of the present invention, first, according to designing requirement, electric motor end cap 1 is processed, as shown in Figure 1, processing bearing chamber 2 on described electric motor end cap 1, the size of described bearing chamber 2 can be processed according to motor bearings to be installed and motor shaft.Then, at the bearing chamber 2 inner surface plating teflon coatings processed, the thickness of described teflon coatings is set to 0.4mm-0.6mm, it is desirable to be set to 0.5mm.Secondly, motor shaft to be installed and motor bearings are fitted together.Finally, by the motor shaft fitted together and motor bearings, it is assemblied in the bearing chamber 2 of electric motor end cap 1.
Although being described above in conjunction with the accompanying drawing function to the present invention and work process; but the invention is not limited in above-mentioned concrete function and work process; above-mentioned detailed description of the invention is merely schematic; rather than it is restrictive; those of ordinary skill in the art is under the enlightenment of the present invention; without departing under present inventive concept and scope of the claimed protection situation, it is also possible to making a lot of form, these belong within the protection of the present invention.
Claims (3)
1. the suppressing method of a motor bearings shaft current, it is characterised in that comprise the following steps:
(1) on electric motor end cap, bearing chamber is processed；
(2) plating of the bearing chamber inner surface in above-mentioned steps (1) teflon coatings；
(3) motor shaft to be installed and motor bearings are fitted together；
(4) by the motor shaft fitted together in step (3) and motor bearings, it is assemblied in the bearing chamber of electric motor end cap.
2. the suppressing method of a kind of motor bearings shaft current according to claim 1, it is characterised in that the thickness of the teflon coatings in described step (2) is set to 0.4mm-0.6mm.
3. the suppressing method of a kind of motor bearings shaft current according to claim 1, it is characterised in that the thickness of the teflon coatings in described step (2) is set to 0.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610370917.XA CN105811638A (en) | 2016-05-27 | 2016-05-27 | Method for suppressing shaft currents for motor bearings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610370917.XA CN105811638A (en) | 2016-05-27 | 2016-05-27 | Method for suppressing shaft currents for motor bearings |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105811638A true CN105811638A (en) | 2016-07-27 |
Family
ID=56452146
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610370917.XA Pending CN105811638A (en) | 2016-05-27 | 2016-05-27 | Method for suppressing shaft currents for motor bearings |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105811638A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201584845U (en) * | 2010-01-15 | 2010-09-15 | 湖南崇德工业科技有限公司 | Insulating end cap for motors and generators |
| CN202127314U (en) * | 2011-06-29 | 2012-01-25 | 湘潭市兴盛液压机械制造有限公司 | Insulation end cover of wind driven generators |
| CN202586595U (en) * | 2012-05-29 | 2012-12-05 | 湖南崇德工业科技有限公司 | Shaft current preventing structure used for large or medium-sized motor sliding bearing |
| CN202616916U (en) * | 2012-06-26 | 2012-12-19 | 东方电气（乐山）新能源设备有限公司 | Novel end cover insulation structure for wind driven generator |
| CN205207435U (en) * | 2015-11-27 | 2016-05-04 | 湖南崇德工业科技有限公司 | Insulating tilting pad babbit slide bearing |
-
2016
- 2016-05-27 CN CN201610370917.XA patent/CN105811638A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201584845U (en) * | 2010-01-15 | 2010-09-15 | 湖南崇德工业科技有限公司 | Insulating end cap for motors and generators |
| CN202127314U (en) * | 2011-06-29 | 2012-01-25 | 湘潭市兴盛液压机械制造有限公司 | Insulation end cover of wind driven generators |
| CN202586595U (en) * | 2012-05-29 | 2012-12-05 | 湖南崇德工业科技有限公司 | Shaft current preventing structure used for large or medium-sized motor sliding bearing |
| CN202616916U (en) * | 2012-06-26 | 2012-12-19 | 东方电气（乐山）新能源设备有限公司 | Novel end cover insulation structure for wind driven generator |
| CN205207435U (en) * | 2015-11-27 | 2016-05-04 | 湖南崇德工业科技有限公司 | Insulating tilting pad babbit slide bearing |
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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 | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160727 |