CN207960857U - A kind of Novel pitch bearing for making impeller that there is unloading effect - Google Patents
A kind of Novel pitch bearing for making impeller that there is unloading effect Download PDFInfo
- Publication number
- CN207960857U CN207960857U CN201721854515.3U CN201721854515U CN207960857U CN 207960857 U CN207960857 U CN 207960857U CN 201721854515 U CN201721854515 U CN 201721854515U CN 207960857 U CN207960857 U CN 207960857U
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- CN
- China
- Prior art keywords
- inner ring
- unloading effect
- pitch bearing
- impeller
- making impeller
- 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.)
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- 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
The utility model belongs to technical field of bearings, specifically a kind of Novel pitch bearing for making impeller have unloading effect.The bearing includes outer ring and inner ring, and inner ring and vertical direction angle are α, and α is（2.5~5°）；The bolt hole of inner ring is perpendicular to inner ring end face.
Description
Technical field
The utility model belongs to technical field of bearings, specifically a kind of Novel pitch axis for making impeller have unloading effect
It holds.
Background technology
In wind-powered electricity generation industry, it is generally the case that pitch variable bearings inner ring couples with blade, and outer ring couples with wheel hub, San Zhehe
Other component forms impeller.With the sustainable development of Wind Power Generation Industry, the small megawatt wind unit of small-power loses competition gradually
Advantage, domestic and international complete machine manufacturing enterprise develop the high-power big impeller diameter Wind turbines of 3.0MW and 3.0MW or more in a hurry.And it is big
Megawatt fan blade diameter is very big, and conventional impellers mounting means be easy to cause the aerodynamic load and major diameter blade of distribution
Own wt prodigious moment of flexure will produce to root of blade, and this moment of flexure with the mechanical periodicity of circumferential air velocity and
Corresponding to change, blade is easy to happen fatigue damage under big alternation Moment.Improved impeller makes the installation axle of blade
Artificially one angle of inclination is held, a centrifugal moment generated by centrifugal force can be played when blade is rotated come partial equilibrium
The torque generated by blade quality and aerodynamic force, plays the role of unloading, it is therefore desirable to Yi Zhongke to root of blade institute bending moment
So that impeller has the pitch variable bearings of offloading functions.
Invention content
The purpose of this utility model is to provide a kind of Novel pitch bearing for making impeller have unloading effect, is mainly used in
On big megawatt of wind turbine.
For achieving the above object, the utility model uses following technical scheme：
A kind of Novel pitch bearing for making impeller have unloading effect, including outer ring and inner ring, inner ring are pressed from both sides with vertical direction
Angle is α, and α is 2.5 ~ 5 °；The bolt hole of inner ring is perpendicular to inner ring end face.
Compared with prior art, beneficial effects of the present invention are：1）After the Novel pitch bearing of the present invention is connect with blade,
The centrifugal force that blade generates when rotating will produce a torque to balance by the torque of gravity and air force generation, reduce blade
The torque that root is born；2）Compared with pitch variable bearings traditional at present, which can more use big megawatt at present,
The type of big impeller diameter, there is wider application space.
Description of the drawings
Fig. 1 the utility model pitch variable bearings structural schematic diagrams；
In figure, 1. outer rings, 2. roller path structures, 3. inner rings；α is the angle of bearing face and horizontal direction；
Fig. 2 conventional impellers installations diagram；
Impeller installations diagram of the Fig. 3 with the utility model pitch variable bearings.
Specific implementation mode
The utility model is described further below in conjunction with specific implementation mode.
A kind of Novel pitch bearing for making impeller have unloading effect, including outer ring and inner ring, inner ring are pressed from both sides with vertical direction
Angle is α, and α is 2.5 ~ 5 °；The bolt hole of inner ring is perpendicular to inner ring end face.
Using ANSYS softwares, whole finite element flexibility analysis is carried out to bearing and blade, to the load of pitch variable bearings,
Stress distribution etc. is assessed, and is calculated analytically, and the safety coefficient at improved new impeller petiole is about tradition
2.3 times, so the utility model bearing its unloading effect is clearly.
Claims (1)
1. a kind of Novel pitch bearing for making impeller that there is unloading effect, including outer ring and inner ring, which is characterized in that inner ring with erect
Straight angular separation is α, and α is 2.5 ~ 5 °；The bolt hole of inner ring is perpendicular to inner ring end face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721854515.3U CN207960857U (en) | 2017-12-27 | 2017-12-27 | A kind of Novel pitch bearing for making impeller that there is unloading effect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721854515.3U CN207960857U (en) | 2017-12-27 | 2017-12-27 | A kind of Novel pitch bearing for making impeller that there is unloading effect |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207960857U true CN207960857U (en) | 2018-10-12 |
Family
ID=63729747
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721854515.3U Active CN207960857U (en) | 2017-12-27 | 2017-12-27 | A kind of Novel pitch bearing for making impeller that there is unloading effect |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207960857U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107965424A (en) * | 2017-12-27 | 2018-04-27 | 瓦房店轴承集团有限责任公司 | Make impeller that there is the Novel pitch bearing of unloading effect |
-
2017
- 2017-12-27 CN CN201721854515.3U patent/CN207960857U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107965424A (en) * | 2017-12-27 | 2018-04-27 | 瓦房店轴承集团有限责任公司 | Make impeller that there is the Novel pitch bearing of unloading effect |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200509 Address after: 116300 Wafangdian City, Liaoning, North Street, a section of the city of St., No. 1, No. Patentee after: WAFANGDIAN BEARING GROUP SPECIAL BEARING Co.,Ltd. Address before: 116300 No. 1, Section 1, North Masonic Street, Dalian, Liaoning, Wafangdian City Co-patentee before: WAFANGDIAN BEARING GROUP NATIONAL BEARING ENGINEERING TECHNOLOGY RESEARCH CENTER Co.,Ltd. Patentee before: WAFANGDIAN BEARING GROUP Co.,Ltd. |
|
| TR01 | Transfer of patent right |