CN106594065A - Bearing and variable pitch bearing of wind generating set - Google Patents
Bearing and variable pitch bearing of wind generating set Download PDFInfo
- Publication number
- CN106594065A CN106594065A CN201611223325.1A CN201611223325A CN106594065A CN 106594065 A CN106594065 A CN 106594065A CN 201611223325 A CN201611223325 A CN 201611223325A CN 106594065 A CN106594065 A CN 106594065A
- Authority
- CN
- China
- Prior art keywords
- bearing
- outer ring
- inner ring
- hole
- mounting disc
- 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.)
- Granted
Links
- 238000007789 sealing Methods 0.000 claims abstract description 33
- 239000004519 grease Substances 0.000 abstract description 9
- 238000005260 corrosion Methods 0.000 abstract description 8
- 230000007797 corrosion Effects 0.000 abstract description 8
- 238000000034 method Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
Classifications
-
- 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
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
- F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
- F16C19/18—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls
-
- 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
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
- F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
- F16C33/7803—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members suited for particular types of rolling bearings
- F16C33/7806—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members suited for particular types of rolling bearings for spherical roller bearings
-
- 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
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
- F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
- F16C33/7816—Details of the sealing or parts thereof, e.g. geometry, material
-
- 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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
-
- 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
- F16C2360/00—Engines or pumps
- F16C2360/31—Wind motors
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolling Contact Bearings (AREA)
Abstract
The invention provides a bearing. The bearing comprises an outer ring (1), an inner ring (2) and a plurality of mounting holes (3) which are respectively located in the outer ring (1) and the inner ring (2), wherein a through hole (4) is formed in at least one of the plurality of mounting holes (3) which are located in the outer ring (1) and/or the inner ring (2), and the through hole (4) is communicated with the mounting holes (3) and the inside of the bearing. The bearing according to the exemplary embodiment of the present invention may have improved rigidity and sealing, may prevent corrosion of the inner and outer ring mounting holes, and may alleviate a problem of grease leakage.
Description
Technical field
The invention belongs to field of bearings, specifically, is related to the pitch variable bearings for becoming oar for wind generator set blade.
Background technology
The power of wind-driven generator comes from blade.When wind speed is larger, to make impeller rotation velocity and input power permanent
The fixed safe and stable operation to ensure unit, needs to adjust blade angle.Blade is connected with pitch variable bearings, and by pitch axis
Hold rotation and realize that blade angle is adjusted.Therefore, pitch variable bearings are the critical components of wind power generating set, and its reliability is unit energy
The key factor of no safe and stable operation.
There is poor rigidity, Internal and external cycle installing hole in the pitch variable bearings of the wind power generating set of prior art,
Therefore pitch variable bearings are caused to be easily broken off.
Fig. 1 is the schematic cross sectional views in installment state of the pitch variable bearings of the wind power generating set of prior art.
With reference to Fig. 1, the pitch variable bearings of the wind power generating set of prior art can include outer ring 1 and inner ring 2.Outer ring 1 can
To be connected with blade flange 7 by bolt 9, inner ring 2 can be connected by bolt 9 with wheelboss flange 8.Fig. 1 is merely illustrative,
The outer ring 1 of pitch variable bearings and inner ring 2 can be connected with blade flange 7 or wheelboss flange 8.As shown in figure 1, being placed in it in bolt 9
In installing hole 3 at be susceptible to corrosion, and cause stress concentration because of the formation of hot spot so that pitch variable bearings easily break
Split.Generally, the corrosion of pitch variable bearings is prevented using the method for the anticorrosion with painting corrosion material at installing hole 3, but this method
Poor reliability, it is impossible to meet use requirement of the wind power generating set up to 20 years.
The content of the invention
An aspect of of the present present invention provides a kind of bearing with high reliability.
Another aspect provides a kind of pitch variable bearings of the wind power generating set with high reliability.
The bearing of exemplary embodiment of the invention includes outer ring, inner ring and is located at respectively in outer ring and inner ring
Multiple installing holes, at least one of the plurality of installing hole in outer ring and/or inner ring place through hole is provided with, described
Through hole connects installing hole and Bearing inner.
Exemplary embodiment of the invention, can be provided with outer ring sealing mounting disc on a surface of outer ring.
Exemplary embodiment of the invention, can be provided with inner ring sealing mounting disc on a surface of inner ring.
Alternatively, the inner ring sealing mounting disc can be arranged on the surface relative with the surface for arranging outer ring sealing mounting disc of inner ring
On.
Exemplary embodiment of the invention, can set on a surface of outer ring and/or a surface of inner ring
Stopping-off piece is equipped with, through hole may be located in stopping-off piece.
Exemplary embodiment of the invention, can be provided with outer ring close in the side relative with the stopping-off piece on outer ring
Envelope mounting disc.
Exemplary embodiment of the invention, can be provided with inner ring close in the side relative with the stopping-off piece on inner ring
Envelope mounting disc.
Exemplary embodiment of the invention, can be provided with the logical of two or more at each installing hole
Hole.
The pitch variable bearings of the wind power generating set of exemplary embodiment of the invention are the bearing.
The bearing of exemplary embodiment of the invention, it is possible to achieve at least one of following technique effect：Can
The corrosion of inside and outside circle installing hole is prevented, so as to avoid the caused stress concentration because of corrosion, the reliability of bearing thus can be improved
Property；Improve the rigidity and sealing of bearing；Promote the discharge of the waste oil of Bearing inner, alleviate the problem of grease leakage.
Description of the drawings
Fig. 1 is the schematic cross sectional views in installment state of the pitch variable bearings of the wind power generating set of prior art.
Fig. 2 is the schematic illustration of the bearing of exemplary embodiment of the invention.
Fig. 3 is the schematic cross sectional views in installment state of the bearing of exemplary embodiment of the invention.
Fig. 4 is the schematic cross sectional views in installment state of bearing in accordance with an alternative illustrative embodiment of the present invention.
Specific embodiment
Hereinafter, the exemplary embodiment of the present invention is described in detail with reference to the accompanying drawings.
Fig. 2 is the schematic illustration of the bearing of exemplary embodiment of the invention.Fig. 3 is example of the invention
The schematic cross sectional views in installment state of the bearing of property embodiment.Fig. 4 is in accordance with an alternative illustrative embodiment of the present invention
Bearing the schematic cross sectional views in installment state.
With reference to Fig. 2 and Fig. 3, the bearing of exemplary embodiment of the invention includes outer ring 1, inner ring 2 and difference position
Multiple installing holes 3 in outer ring 1 and inner ring 2, in the plurality of installing hole 3 in positioned at outer ring 1 and/or inner ring 2 extremely
Through hole 4, the connection installing hole 3 of through hole 4 and Bearing inner are provided with few one so that the grease of Bearing inner can pass through through hole 4
Flow into installing hole 3.
The position of through hole 4, quantity, shape and bearing of trend are not limited to the situation shown in figure, and can be according to actual needs
It is determined that, for example, can be determined according to the mobility status of the grease of Bearing inner, as long as the grease that can make Bearing inner successfully leads to
Cross through hole 4 and flow into installing hole 3.
Exemplary embodiment of the invention, because outer ring 1 is generally easily broken off than inner ring 2, therefore through hole 4 can only set
Put at least one installing hole 3 of outer ring 1, but not limited to this.Alternatively, through hole 4 can be provided only at least the one of inner ring 2
At individual installing hole 3.Alternately, through hole 4 both may be provided at at least one installing hole 3 of outer ring 1, and inner ring 2 is may be provided at again
At least one installing hole 3 at.Additionally, through hole 4 can be provided only on damaging at the larger installing hole 3 of risk, and need not be arranged on
At all of installing hole 3, so as to can reduces cost.
Only arrange at each installing hole 3 through hole 4 although showing in Fig. 3, the invention is not restricted to this.According to this
The exemplary embodiment of invention, can be provided with the through hole 4 of two or more, so as to can ensure that axle at each installing hole 3
The grease for holding inside successfully flows into installing hole 3.Alternatively, described two or more than two through hole 4 can be arranged on installation
Various location on the length direction in hole 3.
In addition, showing that through hole 4 can have approximate cylindrical shape and can essentially perpendicularly prolong with installing hole 3 in Fig. 3
Stretch, but not limited to this, through hole 4 there can be any appropriate shape and can prolong on any suitably direction in Bearing inner
Stretch, for example, can be extended with curved shape.
According to exemplary embodiment, outer ring sealing mounting disc 5 can be provided with a surface of outer ring 1, outer ring is close
Envelope mounting disc 5 can include and the corresponding hole of installing hole 3.When the angle from section view is observed, outer ring seals the width of mounting disc 5
The width of outer ring 1 can be more than.
According to exemplary embodiment, inner ring sealing mounting disc 6 can be provided with a surface of inner ring 2, inner ring is close
Envelope mounting disc 6 can include and the corresponding hole of installing hole 3.As shown in figure 3, inner ring sealing mounting disc 6 may be provided at inner ring 2 with
Arrange on the relative surface in surface of outer ring sealing mounting disc 5.Alternatively, when the angle from section view is observed, inner ring sealing peace
The width of sabot 6 can be more than the width of inner ring 2.
Although Fig. 3 is shown while being provided with outer ring sealing mounting disc 5 and inner ring sealing mounting disc 6, the present invention is not
It is limited to this.For example, the bearing of exemplary embodiment of the invention can only include that outer ring seals mounting disc 5 and inner ring sealing
One in mounting disc 6.
As shown in figure 3, during the bearing in installation and using exemplary embodiment of the invention, can be by spiral shell
Bolt 9 penetrates outer ring 1 from the side for being provided with outer ring sealing mounting disc 5, and can install bolt 9 from inner ring sealing is provided with
The side of disk 6 penetrates inner ring 2 so that outer ring 1 can be connected by bolt 9 with blade flange 7, and inner ring 2 can pass through spiral shell
Bolt 9 is connected with wheelboss flange 8.Fig. 3 is merely illustrative, and outer ring 1 can be connected with wheelboss flange 8 by bolt 9 and inner ring 2 can
To be connected with blade flange 7 by bolt 9, or outer ring 1 and inner ring 2 can be connected with blade flange 7 or wheelboss flange 8.Axle
Hold in the installing hole 3 that the grease of inside can pass through during through hole 4 enters into outer ring 1 and/or inner ring 2, so as to be capable of achieving in installing hole 3
Permanent anticorrosion, and the caused stress concentration by corrosion can be prevented, therefore the reliability of bearing can be improved.In addition,
The discharge of the waste oil of Bearing inner can be promoted by through hole 4, can to a certain extent alleviate the problem of grease leakage.Additionally,
Due to being provided with outer ring sealing mounting disc 5 and/or inner ring sealing mounting disc 6, the sealing of bearing can be improved and increase bearing
Rigidity.
Fig. 4 is the schematic cross sectional views in installment state of bearing in accordance with an alternative illustrative embodiment of the present invention.
For sake of simplicity, the redundancy description with identical content in Fig. 3 will be omitted, and concentrate on their difference.
Bearing in accordance with an alternative illustrative embodiment of the present invention includes outer ring 1, inner ring 2 and is located at the and of outer ring 1 respectively
Multiple installing holes 3 in inner ring 2, set at least one of the plurality of installing hole 3 in outer ring 1 and/or inner ring 2 place
Through hole 4, the connection installing hole 3 of through hole 4 and Bearing inner are equipped with, on a surface of outer ring 1 and/or a surface of inner ring 2
Stopping-off piece 10 is provided with, through hole 4 is located in stopping-off piece 10.Due to being provided with stopping-off piece 10, can prevent what installing hole 3 from corroding
Further increase the rigidity of bearing simultaneously.
Although showing in Fig. 4 and being provided with stopping-off piece 10 on outer ring 1 and inner ring 2, the invention is not restricted to this.Example
Such as, only stopping-off piece 10 can be provided with outer ring 1 or inner ring 2, and in the outer ring 1 or inner ring 2 for being not provided with stopping-off piece 10
Through hole 4 can also be provided with installing hole 3.
According to exemplary embodiment, outer ring sealing peace can be provided with the side relative with the stopping-off piece 10 on outer ring 1
Sabot 5.Additionally, inner ring sealing mounting disc 6 can be provided with the side relative with the stopping-off piece 10 on inner ring 2.Alternatively, it is interior
Circle sealing mounting disc 6 can be arranged on the surface relative with the surface for arranging outer ring sealing mounting disc 5 of inner ring 2.
Additionally, as shown in figure 4, when the angle from section view is observed, the width of stopping-off piece 10 can be more than outer ring 1 or inner ring 2
Width.In addition, stopping-off piece 10 may include and the corresponding hole of installing hole 3.
As shown in figure 4, install and using bearing in accordance with an alternative illustrative embodiment of the present invention during, can be with
Bolt 9 is penetrated into outer ring 1 and the stopping-off piece 10 on outer ring 1 from the side for being provided with outer ring sealing mounting disc 5, and can be by spiral shell
Bolt 9 penetrates inner ring 2 and the stopping-off piece 10 on inner ring 2 from the side for being provided with inner ring sealing mounting disc 6 so that outer ring 1 can lead to
Cross bolt 9 to be connected with blade flange 7, and inner ring 2 can be connected by bolt 9 with wheelboss flange 8.Although Fig. 4 shows setting
The side for being equipped with stopping-off piece 10 is connected with blade flange 7 or wheelboss flange 8, but is installing exemplary enforcement of the invention
During the bearing of example, it is also possible to by be provided with outer ring sealing mounting disc 5 or inner ring sealing mounting disc 6 side and blade flange 7 or
Wheelboss flange 8 connects.
The bearing of exemplary embodiment of the invention can have the rigidity and sealing for improving, and can prevent inside and outside circle
The corrosion of installing hole, and/or the problem of grease leakage can be alleviated.
Additionally, the pitch variable bearings of the wind power generating set of exemplary embodiment of the invention can be the bearing.
Although the present invention, those of ordinary skill in the art are specifically illustrated in and described with reference to exemplary embodiment
It will be appreciated that in the case of without departing from the spirit and scope of the present invention for such as being limited by claim and its equivalent, can
Here makes the various change in form and in details.
Claims (9)
1. a kind of bearing, it is characterised in that be located at including outer ring (1), inner ring (2) and respectively the outer ring (1) and described interior
Multiple installing holes (3) in circle (2), in the plurality of installing hole (3) in the outer ring (1) and/or the inner ring (2)
At least one of place be provided with through hole (4), the through hole (4) connects the installing hole (3) and the Bearing inner.
2. bearing according to claim 1, it is characterised in that be provided with outer ring on a surface of the outer ring (1)
Sealing mounting disc (5).
3. bearing according to claim 1, it is characterised in that be provided with inner ring on a surface of the inner ring (2)
Sealing mounting disc (6).
4. bearing according to claim 2, it is characterised in that in the relative with one surface of the inner ring (2)
Inner ring sealing mounting disc (6) is provided with surface.
5. bearing according to claim 1, it is characterised in that the surface and/or the inner ring in the outer ring (1)
(2) stopping-off piece (10) is provided with a surface, the through hole (4) is in the stopping-off piece (10).
6. bearing according to claim 5, it is characterised in that with the outer ring (1) on the stopping-off piece (10) phase
To side be provided with outer ring sealing mounting disc (5).
7. bearing according to claim 5, it is characterised in that with the inner ring (2) on the stopping-off piece (10) phase
To side be provided with inner ring sealing mounting disc (6).
8. bearing according to claim 1, it is characterised in that each described installing hole (3) place is provided with two or many
In the through hole (4) of two.
9. a kind of pitch variable bearings of wind power generating set, the pitch variable bearings are the axle any one of claim 1 to 8
Hold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611223325.1A CN106594065B (en) | 2016-12-27 | 2016-12-27 | Bearing and variable pitch bearing of wind generating set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611223325.1A CN106594065B (en) | 2016-12-27 | 2016-12-27 | Bearing and variable pitch bearing of wind generating set |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106594065A true CN106594065A (en) | 2017-04-26 |
| CN106594065B CN106594065B (en) | 2019-07-05 |
Family
ID=58602644
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611223325.1A Active CN106594065B (en) | 2016-12-27 | 2016-12-27 | Bearing and variable pitch bearing of wind generating set |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106594065B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2017391882B2 (en) * | 2017-07-28 | 2019-11-14 | Beijing Goldwind Science & Creation Windpower Equipment Co., Ltd. | Pitch apparatus and wind turbine having pitch apparatus |
| CN114072591A (en) * | 2019-07-10 | 2022-02-18 | Nok株式会社 | Sealing device and sealing structure |
| US11454219B2 (en) | 2019-05-10 | 2022-09-27 | General Electric Company | Rotor assembly having a pitch bearing with a stiffener ring |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2005315313A (en) * | 2004-04-28 | 2005-11-10 | Ntn Corp | Sealing structure of bearing |
| CN101363472A (en) * | 2008-09-27 | 2009-02-11 | 包头市汇全稀土实业（集团）有限公司 | Main bearing for wind power generation |
| CN101825064A (en) * | 2010-05-11 | 2010-09-08 | 无锡风电设计研究院有限公司 | Wind generating set capable of fine adjusting attack angle of blade |
| CN101858313A (en) * | 2010-06-10 | 2010-10-13 | 北京京冶轧机轴承制造有限公司 | Wind generating set and variable blade bearing thereof |
| CN201902291U (en) * | 2010-12-10 | 2011-07-20 | 江苏瑞特回转支承有限公司 | Variable-propeller bearing for wind power generation |
| CN202031976U (en) * | 2011-04-10 | 2011-11-09 | 马鞍山方圆回转支承股份有限公司 | Three-row ball type pivoting support |
| CN104169575A (en) * | 2012-02-07 | 2014-11-26 | Imo控股有限责任公司 | Roller bearing arrangement for mounting parts of a wind power plant and a wind power plant having a blade bearing designed in such a manner |
| CN205225591U (en) * | 2015-12-24 | 2016-05-11 | 东方电气风电有限公司 | Aerogenerator becomes reinforcing structure of oar bearing |
-
2016
- 2016-12-27 CN CN201611223325.1A patent/CN106594065B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005315313A (en) * | 2004-04-28 | 2005-11-10 | Ntn Corp | Sealing structure of bearing |
| CN101363472A (en) * | 2008-09-27 | 2009-02-11 | 包头市汇全稀土实业（集团）有限公司 | Main bearing for wind power generation |
| CN101825064A (en) * | 2010-05-11 | 2010-09-08 | 无锡风电设计研究院有限公司 | Wind generating set capable of fine adjusting attack angle of blade |
| CN101858313A (en) * | 2010-06-10 | 2010-10-13 | 北京京冶轧机轴承制造有限公司 | Wind generating set and variable blade bearing thereof |
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| CN202031976U (en) * | 2011-04-10 | 2011-11-09 | 马鞍山方圆回转支承股份有限公司 | Three-row ball type pivoting support |
| CN104169575A (en) * | 2012-02-07 | 2014-11-26 | Imo控股有限责任公司 | Roller bearing arrangement for mounting parts of a wind power plant and a wind power plant having a blade bearing designed in such a manner |
| CN205225591U (en) * | 2015-12-24 | 2016-05-11 | 东方电气风电有限公司 | Aerogenerator becomes reinforcing structure of oar bearing |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2017391882B2 (en) * | 2017-07-28 | 2019-11-14 | Beijing Goldwind Science & Creation Windpower Equipment Co., Ltd. | Pitch apparatus and wind turbine having pitch apparatus |
| US11306698B2 (en) | 2017-07-28 | 2022-04-19 | Beijing Goldwind Science & Creation Windpower Equipment Co., Ltd. | Pitch apparatus and wind turbine having pitch apparatus |
| US11454219B2 (en) | 2019-05-10 | 2022-09-27 | General Electric Company | Rotor assembly having a pitch bearing with a stiffener ring |
| CN114072591A (en) * | 2019-07-10 | 2022-02-18 | Nok株式会社 | Sealing device and sealing structure |
| CN114072591B (en) * | 2019-07-10 | 2024-03-08 | Nok株式会社 | Sealing device and sealing structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106594065B (en) | 2019-07-05 |
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