CN205986518U - Aerogenerator pivot earthing device - Google Patents
Aerogenerator pivot earthing device Download PDFInfo
- Publication number
- CN205986518U CN205986518U CN201621002765.XU CN201621002765U CN205986518U CN 205986518 U CN205986518 U CN 205986518U CN 201621002765 U CN201621002765 U CN 201621002765U CN 205986518 U CN205986518 U CN 205986518U
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- China
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- carbon brush
- grounding
- rotating shaft
- grounding carbon
- ground connection
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Abstract
The utility model discloses aerogenerator pivot earthing device belongs to the power generator shaft grounding technology field, the technical problem that will solve provides a neotype aerogenerator pivot earthing device scheme, avoids aerogenerator to vibrate the electric corrosion who leads to the earthing device inefficacy and cause, the technical scheme who adopts is: which comprises a rotating shaft, the bearing enclosing cover, the ground loop, first ground connection carbon brush and second ground connection carbon brush, the bearing cap is fixed at bearing room and suit in the pivot, the outer terminal surface at the bearing enclosing cover is fixed to the ground loop, fixed mounting has first ground connection carbon brush and second ground connection carbon brush on the ground loop, the ground loop fastening is in the pivot, first ground connection carbon brush and second ground connection carbon brush reliably contact with the pivot, the ground loop is passed through to the shaft current, first ground connection carbon brush and second ground connection carbon brush connect through the line and flow in the earth at the frame and through the frame, the utility model discloses can the reliability of eliminating the shaft current have not been improved simultaneously again because of the oscillation generation intermittent contact causes ground connection malfunctioning during the use.
Description
Technical field
This utility model rotating shaft of wind generator grounding device, belongs to alternator shaft grounding technology field.
Background technology
Bearing is one of most important part of wind-driven generator, and current bearing failure is still the major failure of wind-driven generator
One of.Bearing failure is probably to be caused by several factors, such as：Improper when exceeding expected load, faulty lubrication, transport and shutting down
Disposal, galvano-cautery, installing/dismounting cause damage, the pollution of Bearing inner, seal failure, axle and bearing chamber tolerance fit improper
Deng.Each factor can cause different infringements.
In double-feedback aerogenerator group, bearing failure form also becomes multiformity.But substantially three kinds factors are shaken
Dynamic, galvano-cautery and insufficient lubrication.
Electric current flows through bearing and can produce so-called galvano-cautery.Bearing galvano-cautery usually occurs in electric current via rolling element from one
When individual raceway flows to another raceway.Galvano-cautery depends on discharge energy and persistent period to the destructiveness of bearing, but
Execution basic simlarity, including：Small electrical pitting on rolling element and raceway, lubrication are rapid to degenerate, and produces washboard stricture of vagina etc..
The generation of washboard stricture of vagina is because that the heat producing when discharging can make bearing material surface melt and dissolved, produces pit.Simultaneously
Melting bits and shifting of metal, departs from original position.The metal on electrical pitting surface can be rehardened, and becomes than before
Bearing material is more crisp.The layer that rehardens is presented herein below one layer of annealed layer, and the material of this part is softer than surrounding.The bearing surface of damaged is seen
Get up to shade, it is characterized in that there is much melt and dissolved pitting.These small pits are dispersed throughout on rolling element surface and raceway, recessed
That cheats is small-sized, no matter on inner ring, outer ring or rolling element, its diameter generally has only 5～8 μm.Over time
Passage, the final inefficacy performance of galvano-cautery is exactly that bearing internal external circle assumes obvious washboard stricture of vagina.
Current discharge again results in the degeneration of Bearing inner lubrication, and degenerates rapidly.High temperature makes the interpolation in lubricant
Agent and base oil react, and lead to base oil burning and carbonization, and additive will be used up quickly.Therefore lubricant will become more
Hard even blackening is it is impossible to meet the requirement of lubrication.The rapid inefficacy of lubricant is also that overcurrent leads to lose efficacy.
In double-feedback aerogenerator group due to being powered to rotor windings using converter, inevitable generation axle electricity in rotating shaft
Pressure, if do not take any measure can produce shaft current by bearing；In order that galvanic corrosion phenomenon will not occur, double-fed wind generator machine
Group all arranges a grounding device on rotating shaft top.After being provided with grounding device, increased again and pass through grounding device from rotating shaft
And the electric current producing, and electric current is far longer than the electric current by bearing；Pass through the shaft current of bearing very after end cap is insulated
Little；Be possible to the high frequency electric of shape matched bearings infringement when relatively strong and shaft voltage that frequency is higher occurs, but still
It is unlikely to greater than by the electric current of ground brush device.Therefore the setting of grounding device and brush are to keep away with the reliable contacts of rotating shaft
Exempt to produce the key factor of shaft current.
In double-feedback aerogenerator group is run, vibration is to lead to grounding device loose contact or scaling loss so that there is axle
The principal element of the galvanic corrosion phenomenon held, existing setting at present is all it cannot be guaranteed that the reliability of grounding device.
Utility model content
This utility model is to start with from raising grounding device reliability, overcomes the shortcomings of that prior art exists, solve
Technical problem be provide a kind of new rotating shaft of wind generator grounding device scheme, it is to avoid wind-power electricity generation machine vibration leads to connect
Ground failure of apparatus and the galvano-cautery phenomenon that causes.
In order to solve above-mentioned technical problem, this utility model be employed technical scheme comprise that：Rotating shaft of wind generator is grounded
Device, including rotating shaft, bearing end cover, ground loop, the first grounding carbon brush and the second grounding carbon brush, described bearing cap is fixed on bearing
Room is simultaneously sleeved in rotating shaft, and described ground loop is fixed on the outer face of bearing end cover, and described ground loop is installed with first
Grounding carbon brush and the second grounding carbon brush, described ground loop is fastened in rotating shaft, described first grounding carbon brush and the second grounding carbon brush
With rotating shaft reliable contacts, shaft current is connected on support simultaneously by ground loop, the first grounding carbon brush and the second grounding carbon brush by line
The earth is flowed into by support.
Described first grounding carbon brush and the second grounding carbon brush are located at the both sides of the vertical centrage of rotating shaft respectively, and described first
Angle between the centrage of grounding carbon brush and the vertical centrage of rotating shaft is 30-60 °, and described second grounding carbon brush and first is grounded
Carbon brush structure is identical and is symmetrically installed.
Angle between the centrage of described first grounding carbon brush and the second grounding carbon brush and the vertical centrage of rotating shaft is
45°.
Described first grounding carbon brush and the second grounding carbon brush are fixedly mounted on bearing end cover by carbon brush supports；
The structure of described carbon brush supports fixes a carbon brush groove respectively for arc shape board two ends, the lower edge of described arc shape board with connect
Ground ring outer circumference surface laminating, the first grounding carbon brush and the second grounding carbon brush are separately fixed in two carbon brush grooves, and described first connects
Ground carbon brush and the second grounding carbon brush wire all fixed by snap on arc shape board.
Position on arc shape board for the described carbon brush groove is adjustable.
This utility model is compared with the existing technology had an advantageous effect in that：Rotating shaft left and right above offset 45 ° of left sides
The right side is respectively provided with a grounding carbon brush, and such structure is suitable for each orientation in upper and lower, left and right of wind power generating set rotating shaft
Vibration, will not produce makes discontinuous contact and cause to be grounded failure, improve the reliability eliminating shaft current simultaneously again.
Brief description
The utility model is described in further detail below in conjunction with the accompanying drawings.
Fig. 1 is structural representation of the present utility model.
In figure：1 is rotating shaft, and 2 is bearing end cover, and 3 is ground loop, and 4 is the first grounding carbon brush, and 5 is the second grounding carbon brush, 6
For carbon brush supports.
Specific embodiment
As shown in figure 1, this utility model rotating shaft of wind generator grounding device, including rotating shaft 1, bearing end cover 2, ground loop
3rd, the first grounding carbon brush 4 and the second grounding carbon brush 5, described bearing cap 2 is fixed on bearing chamber and is sleeved in rotating shaft 1, described connects
Ground ring 3 is fixed on the outer face of bearing end cover 2, and described ground loop 3 is installed with the first grounding carbon brush 4 and the second ground connection carbon
Brush 5, described ground loop 3 is fastened in rotating shaft 1, described first grounding carbon brush 4 and the second grounding carbon brush 5 and rotating shaft 1 reliable contacts,
Shaft current is connected on support by ground loop 3, the first grounding carbon brush 4 and the second grounding carbon brush 5 by line and is flowed into by support
Greatly.
Described first grounding carbon brush 4 and the second grounding carbon brush 5 are located at the both sides of the vertical centrage of rotating shaft respectively, and described the
Angle between the centrage of one grounding carbon brush 4 and the vertical centrage of rotating shaft 1 is 30-60 °, described second grounding carbon brush 5 and
One grounding carbon brush 4 structure is identical and is symmetrically installed.
Angle between the centrage of described first grounding carbon brush 4 and the second grounding carbon brush 5 and the vertical centrage of rotating shaft 1 is equal
For 45 °.
Described first grounding carbon brush 4 and the second grounding carbon brush 5 are fixedly mounted on bearing end cover 2 by carbon brush supports 6；
The structure of described carbon brush supports 6 fixes a carbon brush groove respectively for arc shape board two ends, the lower edge of described arc shape board with
Ground loop 3 outer circumference surface is fitted, and the first grounding carbon brush 4 and the second grounding carbon brush 5 are separately fixed in two carbon brush grooves, and described the
The wire of one grounding carbon brush 4 and the second grounding carbon brush 5 all fixed by snap on arc shape board.
Position on arc shape board for the described carbon brush groove is adjustable.
This utility model rotating shaft left and right above skew 45 ° about be respectively provided with a grounding carbon brush, such structure
It is suitable for the vibration in each orientation in upper and lower, left and right of wind power generating set rotating shaft, so that vibration effect is minimized, will not be because interrupted
Contact and cause to be grounded failure, and the reliability that two grounding carbon brushs improve shaft current derivation again is set, thus improving wind-force
The reliability and safety of generator operation, improves the service life of bearing.
Above in conjunction with accompanying drawing, embodiment of the present utility model is explained in detail, but this utility model is not limited to
State embodiment, in the ken that those of ordinary skill in the art possess, can also be without departing from this utility model objective
On the premise of various changes can be made.
Claims (5)
1. rotating shaft of wind generator grounding device it is characterised in that：Including rotating shaft（1）, bearing end cover（2）, ground loop（3）,
One grounding carbon brush（4）With the second grounding carbon brush（5）, described bearing cap（2）It is fixed on bearing chamber and be sleeved on rotating shaft（1）On, institute
State ground loop（3）It is fixed on bearing end cover（2）Outer face, described ground loop（3）On be installed with the first grounding carbon brush（4）
With the second grounding carbon brush（5）, described ground loop（3）It is fastened on rotating shaft（1）On, described first grounding carbon brush（4）With the second ground connection
Carbon brush（5）With rotating shaft（1）Reliable contacts, shaft current passes through ground loop（3）, the first grounding carbon brush（4）With the second grounding carbon brush（5）
Support is connected on and by support inflow the earth by line.
2. rotating shaft of wind generator grounding device according to claim 1 it is characterised in that：Described first grounding carbon brush
（4）With the second grounding carbon brush（5）It is located at the both sides of the vertical centrage of rotating shaft, described the first grounding carbon brush respectively（4）Center
Line and rotating shaft（1）Angle between vertical centrage is 30-60 °, described second grounding carbon brush（5）With the first grounding carbon brush（4）
Structure is identical and is symmetrically installed.
3. rotating shaft of wind generator grounding device according to claim 2 it is characterised in that：Described first grounding carbon brush
（4）With the second grounding carbon brush（5）Centrage and rotating shaft（1）Angle between vertical centrage is 45 °.
4. the rotating shaft of wind generator grounding device according to claim 1-3 any one it is characterised in that：Described first
Grounding carbon brush（4）With the second grounding carbon brush（5）By carbon brush supports（6）It is fixedly mounted on bearing end cover（2）On；
Described carbon brush supports（6）Structure fix a carbon brush groove respectively for arc shape board two ends, the lower edge of described arc shape board with connect
Ground ring（3）Outer circumference surface is fitted, the first grounding carbon brush（4）With the second grounding carbon brush（5）It is separately fixed in two carbon brush grooves, institute
State the first grounding carbon brush（4）With the second grounding carbon brush（5）Wire all fixed by snap on arc shape board.
5. rotating shaft of wind generator grounding device according to claim 4 it is characterised in that：Described carbon brush groove is in arc shape board
On position adjustable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621002765.XU CN205986518U (en) | 2016-08-31 | 2016-08-31 | Aerogenerator pivot earthing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621002765.XU CN205986518U (en) | 2016-08-31 | 2016-08-31 | Aerogenerator pivot earthing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205986518U true CN205986518U (en) | 2017-02-22 |
Family
ID=58038642
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621002765.XU Active CN205986518U (en) | 2016-08-31 | 2016-08-31 | Aerogenerator pivot earthing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205986518U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111712997A (en) * | 2018-04-30 | 2020-09-25 | 纽摩泰科有限公司 | Brushless DC motor with improved grounding structure |
-
2016
- 2016-08-31 CN CN201621002765.XU patent/CN205986518U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111712997A (en) * | 2018-04-30 | 2020-09-25 | 纽摩泰科有限公司 | Brushless DC motor with improved grounding structure |
| CN111712997B (en) * | 2018-04-30 | 2022-11-11 | 纽摩泰科有限公司 | Brushless DC motor with improved grounding structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | "change of name, title or address" | ||
| CP03 | "change of name, title or address" |
Address after: 044500 Zhongshan West Street, Yongji City, Yuncheng City, Shanxi Province (north of distillery) Patentee after: Yongji Zhongxin Electric Machinery Technology Co.,Ltd. Address before: 044500 Jiuchang Road, Zhongshan West Street, Yongji, Yuncheng City, Shanxi Province Patentee before: YONGJI ZHONGXIN MOTOR FITTING MANUFACTURING Co.,Ltd. |