CN101581271A - Blade pitch control mechanism for wind generating set - Google Patents
Blade pitch control mechanism for wind generating set Download PDFInfo
- Publication number
- CN101581271A CN101581271A CNA2008100247390A CN200810024739A CN101581271A CN 101581271 A CN101581271 A CN 101581271A CN A2008100247390 A CNA2008100247390 A CN A2008100247390A CN 200810024739 A CN200810024739 A CN 200810024739A CN 101581271 A CN101581271 A CN 101581271A
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- Prior art keywords
- levers
- ball bearing
- spindle nose
- shaft
- control mechanism
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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
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Abstract
The invention discloses blade pitch control mechanism for a wind generating set. A shifting groove is arranged at the lower part of one end of three racks of the blade pitch control mechanism, a lever mechanism is provided with a connecting rod shaft, three levers and three supports, wherein the three supports are all evenly distributed on a wheel hub, the middle parts of the three levers are respectively connected with the three supports through hinges, the outer ends of the three levers are respectively positioned in the shifting grooves at the lower parts of the three racks, the outer end of the connecting rod shaft is connected with a piston rod of a hydraulic oil cylinder, a thread is arranged on a shaft head at the inner end of the connecting rod shaft, a shaft shoulder is arranged on the shaft body far from the shaft head, an inner radial-thrust ball bearing and an outer radial-thrust ball bearing are sleeved between the shaft shoulder and the shaft head, the inner ends of the spherical structures of the three levers are positioned between the inner radial-thrust ball bearing and the outer radial-thrust ball bearing, and the axial clearance among the inner ends of the three levers, the inner radial-thrust ball bearing and the outer radial-thrust ball bearing is eliminated by screwing a locking nut on the shaft head at the inner end of the connecting rod shaft. The invention has the advantages of long service life and simple structure.
Description
Technical field
The present invention relates to a kind of blade pitch control mechanism for wind generating set.
Background technique
Wind power generating set contains three blades that receive wind energy usually, and for reaching the ability that blade receives wind energy that changes, the angle that facings the wind of these three blades is regulated by blade pitch control mechanism usually.Blade pitch control mechanism for wind generating set mainly contains three blade bearings, three gearwheels, tooth bar, tooth bar bearing, leverage, hydraulic jack.Three blades of wind power generating set are respectively by on the uniform wheel hub that is arranged on wind power generating set of three blade bearings.Three gearwheels are separately positioned on the root of three blades.Three uniform inwalls that are arranged on wheel hub of tooth bar bearing, three tooth bars are installed in respectively in the chute of three tooth bar bearings, and the bottom of each tooth bar one end is provided with allocating slot.Leverage is made up of central gear, link rod axle, three levers and support, three uniform being arranged on the wheel hub of support, the middle part of three levers connects with three stand hinge respectively, the outer end of three levers lays respectively in the allocating slot of three tooth bar bottoms, one end of link rod axle and the piston rod of hydraulic jack link, the other end and the central gear of link rod axle link, and the inner that three levers are sphere structure is positioned at the groove that the central gear periphery is provided with.Because when rotated in groove the inners of three levers, the inner of lever and groove were sliding friction, so the inner of lever and groove wear and tear easily, thereby influence the working life of blade pitch control mechanism for wind generating set.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of blade pitch control mechanism for wind generating set, and it is long service life not only, and simple in structure.
For solving the problems of the technologies described above, a kind of blade pitch control mechanism for wind generating set provided by the invention, it contains wheel hub, leverage, three gearwheels, tooth bar, three tooth bars are installed in respectively in the chute of three tooth bar bearings, the bottom of each tooth bar one end is provided with allocating slot, described leverage contains the link rod axle, three levers and three supports, three uniform being arranged on the described wheel hub of support, the middle part of three levers connects with three stand hinge respectively, the outer end of three levers lays respectively in the allocating slot of three tooth bar bottoms, the inner of three levers is a sphere structure, the outer end of link rod axle and the piston rod of hydraulic jack link, the spindle nose of link rod axle the inner is provided with screw thread, on axle body, establish the shaft shoulder away from this spindle nose, in between this shaft shoulder and spindle nose, being set with, outer two angular contact ball bearings, the inner that described three levers are sphere structure is positioned at, between outer two angular contact ball bearings, and by the locking nut on the spindle nose that is tightened in link rod axle the inner eliminate three levers inner and in, axial clearance between outer two angular contact ball bearings.
Axle body between the described shaft shoulder and the spindle nose is the step axle, and the angular contact ball bearing internal diameter ratio of close spindle nose one side is little 5 millimeters to trying hard to recommend power ball bearing internal diameter the shaft shoulder one side.
Owing on the axle body of link rod axle the inner, install inside and outside two angular contact ball bearings, and the inner of three levers is between these two angular contact ball bearings, the inner that makes three levers like this is when the link rod axle rotates, only rotate by these two angular contact ball bearings, therefore can not wear and tear because of rotating around the link rod axle in the inner of three levers, and this has improved the working life of blade pitch control mechanism for wind generating set greatly.Compared with prior art, saved non-tender central gear, adopted standard piece to trying hard to recommend the power ball bearing, therefore not only cost of production is low, and simple in structure.
Description of drawings
Fig. 1 is the structural representation of a kind of blade pitch control mechanism for wind generating set of the present invention.
Fig. 2 is the partial enlarged view of figure.
1. wheel hubs among the figure, 2. gearwheel, 3. locking nut, 4. in angular contact ball bearing, the 5. shaft shoulder, 6. link rod axle, 7. outer entad thrust ball bearing, 8. lever, 9. support, 10. allocating slot, 11. tooth bar bearings, 12. tooth bars, 13. spindle noses.
Embodiment
Among Fig. 1, blade pitch control mechanism for wind generating set contains wheel hub 1, leverage, three gearwheels 2,12, three tooth bars 12 of tooth bar and is installed in respectively in the chute of three tooth bar bearings 11, and the bottom of each tooth bar 12 1 end is equipped with allocating slot 10.Leverage contains link rod axle 6, three levers 8 and three supports 9.Three support 9 uniform being arranged on the wheel hub 1, the middle part of three levers 8 respectively with three support 9 hinge-coupled.The outer end of three levers 8 lays respectively in the allocating slot 10 of three tooth bar 12 bottoms, and for reducing surface friction drag, outer end and the inner of three levers 8 can be sphere structure.The outer end of link rod axle 6 and the piston rod of hydraulic jack link, and be not shown in the figures.The spindle nose 13 of link rod axle the inner is provided with screw thread, establishes the shaft shoulder 5 on the axle body away from this spindle nose 13, is set with inside and outside two angular contact ball bearings 4,7 between this shaft shoulder 5 and spindle nose 13.The inner that three levers 8 are sphere structure is between inside and outside two angular contact ball bearings 4,7, and, eliminate the inner of three levers 8 and the axial clearance between inside and outside two angular contact ball bearings 4,7 by the locking nut 3 on the spindle nose 13 that is tightened in link rod axle 6 the inners.For the ease of installing and maintenance, the axle body between the shaft shoulder 5 and the spindle nose 13 is the step axle, and the internal diameter ratio of the outer entad thrust ball bearing 7 of close spindle nose 13 1 sides is little 5 millimeters at the internal diameter of the internal-direction-force thrust ball bearing 4 of the shaft shoulder 5 one sides.Because the present invention is on the basis of existing technology, by on the axle body of the inner of link rod axle 6, installing inside and outside two angular contact ball bearings 4,7, and the inner that makes three levers 8 is between inside and outside two angular contact ball bearings 4,7, like this when the inners of three levers 8 when link rod axle 6 rotates, only rotate by inside and outside two angular contact ball bearings 4,7, therefore the inner of three levers 8 can be because of not wearing and tearing around the rotation of link rod axle 6, thus the working life of having improved blade pitch control mechanism for wind generating set.Because adopt standard piece to trying hard to recommend the power ball bearing, therefore not only cost of production is low, and simple in structure.
Claims (2)
1. blade pitch control mechanism for wind generating set, it contains wheel hub, leverage, three gearwheels, tooth bar, three tooth bars are installed in respectively in the chute of three tooth bar bearings, the bottom of each tooth bar one end is provided with allocating slot, described leverage contains the link rod axle, three levers and three supports, three uniform being arranged on the described wheel hub of support, the middle part of three levers connects with three stand hinge respectively, the outer end of three levers lays respectively in the allocating slot of three tooth bar bottoms, the inner of three levers is a sphere structure, the outer end of link rod axle and the piston rod of hydraulic jack link, it is characterized in that: the spindle nose of described link rod axle the inner is provided with screw thread, on axle body, establish the shaft shoulder away from this spindle nose, in between this shaft shoulder and spindle nose, being set with, outer two angular contact ball bearings, the inner that described three levers are sphere structure is positioned at, between outer two angular contact ball bearings, and by the locking nut on the spindle nose that is tightened in link rod axle the inner eliminate three levers inner and in, axial clearance between outer two angular contact ball bearings.
2. a kind of blade pitch control mechanism for wind generating set according to claim 1, it is characterized in that: the axle body between the described shaft shoulder and the spindle nose is the step axle, and the angular contact ball bearing internal diameter ratio of close spindle nose one side is little 5 millimeters to trying hard to recommend power ball bearing internal diameter the shaft shoulder one side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100247390A CN101581271A (en) | 2008-05-12 | 2008-05-12 | Blade pitch control mechanism for wind generating set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100247390A CN101581271A (en) | 2008-05-12 | 2008-05-12 | Blade pitch control mechanism for wind generating set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101581271A true CN101581271A (en) | 2009-11-18 |
Family
ID=41363559
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100247390A Pending CN101581271A (en) | 2008-05-12 | 2008-05-12 | Blade pitch control mechanism for wind generating set |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101581271A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110192027A (en) * | 2017-01-05 | 2019-08-30 | 维斯塔斯风力系统有限公司 | Pitch for adjusting the propeller pitch angle of the blade of wind turbine adjusts cylinder |
-
2008
- 2008-05-12 CN CNA2008100247390A patent/CN101581271A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110192027A (en) * | 2017-01-05 | 2019-08-30 | 维斯塔斯风力系统有限公司 | Pitch for adjusting the propeller pitch angle of the blade of wind turbine adjusts cylinder |
| CN110192027B (en) * | 2017-01-05 | 2020-08-21 | 维斯塔斯风力系统有限公司 | Pitch adjustment cylinder for adjusting the pitch angle of a blade of a wind turbine |
| US10895245B2 (en) | 2017-01-05 | 2021-01-19 | Vestas Wind Systems A/S | Pitch adjustment cylinder for adjustment of a pitch angle of a blade of a wind turbine |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20091118 |