CN212784994U - Ground-bearing device for driving end shaft of wind driven generator - Google Patents
Ground-bearing device for driving end shaft of wind driven generator Download PDFInfo
- Publication number
- CN212784994U CN212784994U CN202021659732.9U CN202021659732U CN212784994U CN 212784994 U CN212784994 U CN 212784994U CN 202021659732 U CN202021659732 U CN 202021659732U CN 212784994 U CN212784994 U CN 212784994U
- Authority
- CN
- China
- Prior art keywords
- brush holder
- carbon brush
- supporting plate
- bearing
- driven generator
- 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.)
- Active
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
Abstract
A grounding device for a bearing at the drive end of a wind driven generator comprises a carbon brush arranged at the bearing at the drive end of the wind driven generator, wherein the carbon brush is arranged in a carbon brush holder and is connected with the carbon brush holder through a constant-pressure spring; the carbon brush holder is connected with a brush holder system supporting plate, and the brush holder system supporting plate is detachably connected with the insulating support. Two carbon brush holders are symmetrically arranged on two sides of the brush holder system support plate, and carbon brush holder connectors are arranged on the carbon brush holders; two strip-shaped mounting grooves are formed in the brush holder system supporting plate, and the carbon brush holder connector is mounted in the strip-shaped mounting grooves through bolts. The device adopts the mode that the grounding device is additionally arranged at the driving end, a low-impedance path is created between the inner raceway and the outer raceway of the bearing, the bearing is bypassed, and the electric corrosion of the bearing can be avoided without conducting the shaft voltage through the bearing.
Description
Technical Field
The utility model belongs to wind generating set earthing device field, in particular to aerogenerator drive end bearing earthing device.
Background
The total installed capacity of wind power generation in a certain area is 3 multiplied by 49.5MW, and 99 wind power generator sets with the single machine capacity of 1.5MW are installed in total. The combined power UP1.5MW unit generator in the first-stage project adopts SKYFKK1500 series air cooling double-fed generator, rated output power 1551kW, rated rotation speed 1750r/min, stator rated voltage 690V, stator rated current 1120A, rotor open-circuit voltage 1870V, rotor rated current 426A, stator and rotor wiring mode Y-Y, the front and rear bearings of the generator are common bearings, and the model is as follows: 6330M/C3H, and the shaft extension end and the non-shaft extension end both adopt insulated end covers.
Because the drive end bearing is not designed with a grounding carbon brush, the front bearing and the rear bearing adopt common bearings (non-insulating bearings), the fan converter adopts PWM (pulse width modulation) modulation, the converter generates high-frequency shaft voltage on a transmission system of the wind turbine generator, the shaft voltage is transmitted to the generator, a loop is formed by a rotating shaft, a bearing inner ring, a bearing outer ring and a bearing chamber, and small and deep circular corrosion points or strip-shaped electric arc scars are generated on the surfaces of the rotating shaft bearing position and the bearing inner ring due to electric arc discharge, so that the unit vibration is overlarge and the bearing gradually fails.
Disclosure of Invention
In view of the technical problem that the background art exists, the utility model provides a aerogenerator drive end bearing earthing device, this device adopt to increase earthing device at the drive end, create a low impedance route between the interior raceway of bearing and outer raceway, carry out the bypass to the bearing, and axle voltage does not just can avoid the bearing to take place the galvanic corrosion through the bearing conduction.
In order to solve the technical problem, the utility model discloses following technical scheme has been taken and has been realized:
a grounding device for a bearing at the drive end of a wind driven generator comprises a carbon brush arranged at the bearing at the drive end of the wind driven generator, wherein the carbon brush is arranged in a carbon brush holder and is connected with the carbon brush holder through a constant-pressure spring; the carbon brush holder is connected with a brush holder system supporting plate, and the brush holder system supporting plate is detachably connected with the insulating support.
In the preferred scheme, two carbon brush holders are symmetrically arranged on two sides of the brush holder system support plate, and carbon brush holder connectors are arranged on the carbon brush holders; two strip-shaped mounting grooves are formed in the brush holder system supporting plate, and the carbon brush holder connector is mounted in the strip-shaped mounting grooves through bolts.
In a preferred scheme, the brush holder system supporting plate comprises a first supporting plate and a second supporting plate, and the first supporting plate is connected with the second supporting plate through a bolt; all be equipped with the arc wall in first backup pad and the second backup pad, two arc walls set up relatively and have formed the fixed slot, and the fixed slot is used for fixed insulation support.
In a preferable scheme, the insulating support comprises an insulating support tube arranged in a fixing groove, a connecting thread head is arranged at one end of the insulating support tube, and the connecting thread head is used for being connected with a generator end cover.
In the preferred scheme, the second supporting plate is an inverted T-shaped plate, two side bolt holes are formed in two ends of the inverted T-shaped plate, the side bolt holes are fixed with the first supporting plate through side connecting bolts, a middle fastening bolt is arranged in the middle of the inverted T-shaped plate, and the middle fastening bolt is used for fastening the insulating supporting tube.
This patent can reach following beneficial effect:
the device adopts the mode that the grounding device is additionally arranged at the driving end, a low-impedance path is created between the inner raceway and the outer raceway of the bearing, the bearing is bypassed, and the electric corrosion of the bearing can be avoided without conducting the shaft voltage through the bearing.
After the insulating support tube hooping columns are connected by the two side connecting bolts, the insulating support tube is slightly rotated by the angle so as to adjust the installation angles of the two carbon brushes, and after the angle adjustment of the two carbon brushes is completed, the middle fastening bolt is fastened so that the insulating support tube is fixed. Two limit connecting bolt can play the effect of preliminary fixed insulation support pipe, then strike brush yoke system backup pad through the object, make brush yoke system backup pad angle fine adjustment, fastening bolt carries out ultimate fastening in the middle of the fastening at last.
Drawings
The invention will be further explained with reference to the following figures and examples:
FIG. 1 is a three-dimensional structure diagram of the present invention;
FIG. 2 is a front view of the present invention;
fig. 3 is a side view of the present invention.
In the figure: the carbon brush comprises a carbon brush 1, a carbon brush holder 2, a constant pressure spring 3, a brush holder system supporting plate 4, a first supporting plate 41, a second supporting plate 42, a strip-shaped mounting groove 43, an insulating support 5, an insulating supporting tube 51, a connecting threaded head 52, an edge connecting bolt 61 and a middle fastening bolt 62.
Detailed Description
As shown in fig. 1 to 3, a grounding device for a bearing at a driving end of a wind driven generator includes a carbon brush 1 disposed at the bearing at the driving end of the wind driven generator, the carbon brush 1 is disposed in a carbon brush holder 2, and the carbon brush 1 is connected with the carbon brush holder 2 through a constant pressure spring 3; the carbon brush holder 2 is connected with a brush holder system support plate 4, and the brush holder system support plate 4 is detachably connected with an insulating support 5.
The material of the brush holder system supporting plate 4 is 1Cr17Mn6Ni5N, the hardness grade is HRC56-62, and the surface of the brush holder system supporting plate 4 is electroplated.
The carbon brush holder 2 is made of brass alloy, and the processing technology and the mechanical property meet the requirements of brush holder size for JBT 5779-.
The insulating support 5 is made of an epoxy resin insulating pipe, and is qualified in a ground withstand voltage test by using a 2500V megger test for one minute.
The constant pressure spring 3 is made of 0Cr18Ni9 and is produced and manufactured according to JB2361-2007 constant pressure brush holder and spring.
Furthermore, two carbon brush holders 2 are symmetrically arranged on two sides of the brush holder system support plate 4, and carbon brush holder connectors are arranged on the carbon brush holders 2; two strip-shaped mounting grooves 43 are formed in the brush holder system supporting plate 4, and the carbon brush holder connector is mounted in the strip-shaped mounting grooves 43 through bolts. The included angle of the two carbon brush holders 2 can be set to be about 22 degrees by taking the main shaft of the motor as a reference.
The material of the connector of the carbon brush holder is H59, and the surface of the connector is electroplated with nickel 9 μm.
Further, the brush holder system support plate 4 includes a first support plate 41 and a second support plate 42, the first support plate 41 and the second support plate 42 are connected by bolts; arc-shaped grooves are formed in the first supporting plate 41 and the second supporting plate 42, fixing grooves are formed in the two arc-shaped grooves in a relative mode, and the fixing grooves are used for fixing the insulating supports 5. The lower edge of the first support plate 41 has a gap of 2.0-3.0mm from the main axis.
Further, the insulating support 5 comprises an insulating support pipe 51 arranged in the fixing groove, one end of the insulating support pipe is provided with a connecting threaded head 52, and the connecting threaded head 52 is used for being connected with the end cover of the generator.
Further, the second supporting plate 42 is an inverted T-shaped plate, two side bolt holes are formed in two ends of the inverted T-shaped plate, the side bolt holes are fixed to the first supporting plate 41 through side connecting bolts 61, a middle fastening bolt 62 is arranged in the middle of the inverted T-shaped plate, and the middle fastening bolt 62 is used for fastening the insulating supporting tube 51. After the insulating support tube 51 is hooped by the two side connecting bolts 61, the insulating support tube 51 is slightly rotated by an angle so as to adjust the installation angles of the two carbon brushes 1, and after the angle adjustment of the two carbon brushes 1 is completed, the middle fastening bolt 62 is fastened so as to fix the insulating support tube 51.
The whole performance requirement of the whole device is as follows:
insulation resistance: more than or equal to 1000 MOmega/500 VDC;
strength of the insulator: 500VAC @60Hz, 60S;
compressive strength: 2500V;
the heat resistance grade is F grade;
working and using temperatures: -30-150 ℃.
Claims (5)
1. A wind-driven generator drive end shaft ground receiving device is characterized in that: the carbon brush (1) is arranged at a bearing of a driving end of the wind driven generator, the carbon brush (1) is arranged in a carbon brush holder (2), and the carbon brush (1) is connected with the carbon brush holder (2) through a constant-pressure spring (3); the carbon brush holder (2) is connected with a brush holder system supporting plate (4), and the brush holder system supporting plate (4) is detachably connected with an insulating support (5).
2. The wind driven generator drive end bearing grounding device of claim 1, wherein: two carbon brush holders (2) are symmetrically arranged on two sides of the brush holder system supporting plate (4), and carbon brush holder connectors are arranged on the carbon brush holders (2); two strip-shaped mounting grooves (43) are formed in the brush holder system supporting plate (4), and the carbon brush holder connector is mounted in the strip-shaped mounting grooves (43) through bolts.
3. The wind driven generator drive end bearing grounding device of claim 2, wherein: the brush holder system support plate (4) comprises a first support plate (41) and a second support plate (42), and the first support plate (41) is connected with the second support plate (42) through bolts; arc-shaped grooves are formed in the first supporting plate (41) and the second supporting plate (42) and are oppositely arranged to form fixing grooves, and the fixing grooves are used for fixing the insulating supports (5).
4. The wind driven generator drive end shaft grounding device according to claim 3, wherein: the insulating support (5) comprises an insulating support pipe (51) arranged in the fixing groove, a connecting thread head (52) is arranged at one end of the insulating support pipe, and the connecting thread head (52) is used for being connected with the end cover of the generator.
5. The wind driven generator drive end shaft grounding device according to claim 4, wherein: the second supporting plate (42) is an inverted T-shaped plate, two side bolt holes are formed in two ends of the inverted T-shaped plate, the side bolt holes are fixed with the first supporting plate (41) through side connecting bolts (61), middle fastening bolts (62) are arranged in the middle of the inverted T-shaped plate, and the middle fastening bolts (62) are used for fastening the insulating supporting tube (51).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021659732.9U CN212784994U (en) | 2020-08-11 | 2020-08-11 | Ground-bearing device for driving end shaft of wind driven generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021659732.9U CN212784994U (en) | 2020-08-11 | 2020-08-11 | Ground-bearing device for driving end shaft of wind driven generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212784994U true CN212784994U (en) | 2021-03-23 |
Family
ID=75051364
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021659732.9U Active CN212784994U (en) | 2020-08-11 | 2020-08-11 | Ground-bearing device for driving end shaft of wind driven generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212784994U (en) |
-
2020
- 2020-08-11 CN CN202021659732.9U patent/CN212784994U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2009111355A3 (en) | Distributed wind turbine electric generation system | |
| CN107425753B (en) | Speed-increasing type wind power piezoelectric generation device | |
| CN102817783A (en) | Vertical axis tube type wind generator | |
| CN212784994U (en) | Ground-bearing device for driving end shaft of wind driven generator | |
| CN203813610U (en) | Variable-pitch electrical slip ring device of wind turbine | |
| CN110345000B (en) | Double-impeller contra-rotating horizontal shaft wind turbine | |
| CN101483371A (en) | Speed regulating electricity generator with constant frequency | |
| CN110021990A (en) | Composite marine electricity generation system based on battery energy storage | |
| CN210106072U (en) | Efficient vertical axis wind turbine | |
| CN209709867U (en) | A kind of umbrella shape wind energy conversion system permanent-magnet synchronous generator | |
| KR20110003990A (en) | Multi generater | |
| CN102882335B (en) | Axial magnetic flux permanent magnet induction wind-driven generator | |
| CN201138776Y (en) | Speed regulating electricity generator with constant frequency | |
| CN107435615B (en) | One kind catching wind and the integrated wind-driven generator of rotor | |
| CN202250622U (en) | Wind power generation device | |
| CN220353978U (en) | Hydroelectric power generation device | |
| JP2010514980A (en) | Wind power generator | |
| CN212695823U (en) | Hydraulic generator rotor lead wire fixed knot constructs | |
| CN116191776B (en) | Power generation system and wind generating set | |
| CN111412109B (en) | Wind-driven generator | |
| CN216477662U (en) | Fan structure of generator | |
| CN103321842A (en) | Efficient wind-driven generator | |
| CN215672552U (en) | Fixing device for wind driven generator shell | |
| CN220395892U (en) | Wind energy conversion device | |
| CN220522684U (en) | Ocean tide power generation equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |