CN104595107A - Blade variable-pitch mechanism of wind generating set - Google Patents
Blade variable-pitch mechanism of wind generating set Download PDFInfo
- Publication number
- CN104595107A CN104595107A CN201410735749.0A CN201410735749A CN104595107A CN 104595107 A CN104595107 A CN 104595107A CN 201410735749 A CN201410735749 A CN 201410735749A CN 104595107 A CN104595107 A CN 104595107A
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- Prior art keywords
- pitch
- blade
- variable
- plate
- inner wing
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- 238000009434 installation Methods 0.000 abstract description 8
- 238000012423 maintenance Methods 0.000 abstract description 6
- 238000010276 construction Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 2
- 241000233855 Orchidaceae Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
- F03D7/022—Adjusting aerodynamic properties of the blades
- F03D7/0224—Adjusting blade pitch
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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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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Wind Motors (AREA)
Abstract
The invention discloses a blade variable-pitch mechanism of a wind generating set. The blade variable-pitch mechanism comprises hubs, variable-pitch driving bearings, blades, inner gear rings and variable-pitch driving gears meshed with the inner gear rings. Four-point contact ball bearings are adopted as the variable-pitch bearings, the hubs are connected with the inner rings of the variable-pitch bearings through bolts, and joint flanges are clamped between the variable-pitch bearings and the blades. The joint flanges comprise outer connecting edges and inner wing ring plates which are integrated, the outer rings of the variable-pitch bearings, the outer connecting edges of the joint flanges and the blades are connected through long bolts, the inner wing ring plates are located above the end face of the inner gear rings and connected through a bolt, and the variable-pitch driving gears are located in the hubs. The blade variable-pitch mechanism has the advantages that the blades are connected with the outer rings of the variable-pitch bearings, the blade installation construction space is sufficient, construction and installation can be conducted from the outer portion of the hubs, the blade installation and maintenance efficiency are obviously improved, the maintenance cost is greatly reduced and the maintenance time is greatly shortened.
Description
Technical field
The present invention relates to a kind of wind generator set blade blade pitch device, particularly relate to a kind of blade pitch system be applied on MW wind turbine generator set.
Background technique
Wind energy resources, as a kind of clean renewable energy sources, extensively exists in the whole world, aboundresources, inexhaustible, the environmental protection of use.Therefore wind energy power has safety, clean feature, can be the energy supply that the mankind provide steady in a long-term.At present, Main Developed Countries, developing country, all will develop wind energy power technology as state basic policy and the important means tackling new century energy challenge.
Wind wheel system is the core of wind power generating set, and the pitch-controlled system of wind wheel directly determines the reliability of wind power generating set, and the structural design becoming oar drive system is the key link of wind power generating set.The change oar drive system of wind power generating set is mainly divided into electric variable pitch mode and hydraulic vane change mode both at home and abroad at present, and the present invention is mainly for electric variable pitch driving mode.Blade electric variable pitch can be divided into two kinds again according to change oar drive arrangement mode: external driving becomes oar mode and built-in driving becomes oar.External driving becomes oar can realize advantages such as exporting compared with high pulling torque, blades installation efficiency is high, hub design is compact, but the lubricant oil collection used between driving pinion and pitch variable bearings gear ring is comparatively difficult, there is the risk of leaking and polluting unit or environment, become oar driving gear-box simultaneously and also there is oil leak, have the risk polluting unit or environment, in addition, the power system driven owing to becoming oar is installed on the front end of wheel hub, once system malfunctions, change or safeguard comparatively difficulty.The built-in change oar drive system becoming oar that drives all is installed on wheel hub inside, even if having greasy dirt to leak also all be present in wheel hub inside, be closed by wheel hub, can not to environment, but due to its structural feature, the inner ring of blades installation and pitch variable bearings, the outer ring of wheel hub and pitch variable bearings is connected, so the size of wheel hub is relatively large, add size and the cost of unit.More crucially, no matter be external driving mode or built-in driving mode, the gear of drive vane is all designed to one with pitch variable bearings, according to the design standard of current wind power generating set, the Life Design of unit, all more than 20 years, once occur driving gear ring wearing and tearing or damaging in life span, all effectively cannot be repaired driving gear ring, carry out integral replacing to pitch variable bearings after wind wheel must being removed, engineering time is longer and expense is huge.
Summary of the invention
For solving above technical deficiency, the invention provides a kind of long service life, the wind generator set blade blade pitch device that maintenance cost is low.
The present invention is achieved by the following measures:
A kind of wind generator set blade blade pitch device of the present invention, comprise wheel hub, pitch variable bearings, blade, ring gear and the change oar actuation gear be meshed with ring gear, described pitch variable bearings adopts four-point contact ball, the inner ring of described wheel hub and pitch variable bearings is bolted, adapter flange is accompanied between described pitch variable bearings and blade, described adapter flange comprises outer connection edge and the inner wing ring flat-plate of one, the outer ring of pitch variable bearings, the outer connection edge of adapter flange is connected by stay bolt with blade, described inner wing ring flat-plate to be positioned at above end face of ring gear and to be connected by bolt, described change oar actuation gear is positioned at wheel hub inside.
The inner wing ring flat-plate inner round portion of above-mentioned adapter flange is connected by bolt with end face of ring gear, inner wing ring flat-plate inner round portion is lower than inner wing ring flat-plate outer perimeter section, and seamlessly transit between inner wing ring flat-plate outer perimeter section and inner wing ring flat-plate inner round portion, bottom the outer perimeter section of inner wing ring flat-plate and leave the space of wearing bolt between the inner ring top of pitch variable bearings.
The inner wing ring flat-plate inner round portion of above-mentioned adapter flange is evenly distributed in major diameter round hole.
The invention has the beneficial effects as follows: 1, blade is connected with pitch variable bearings outer ring, blades installation construction space is sufficient and can carry out construction and installation from wheel hub outside, significantly improves blades installation and maintenance efficiency;
2, wheel hub structure is more compact, not only can reduce boundary dimension, reduces weight and cost, and can promote stiffness by itself, improves mechanical property; If 3, engaging tooth damages in length of life, by rotating ring gear and changing its link position with adapter flange, thus change ring gear and adjust with the mode becoming oar actuation gear fitting surface, reduction maintenance cost and engineering time greatly.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Wherein: 1 wheel hub, 2 pitch variable bearings, 3 adapter flanges, connect edge outside 3.1,3.2 inner wing ring flat-plates, 4 blades, 5 ring gears, and 6 become oar actuation gear.
Embodiment
Below in conjunction with accompanying drawing, further detailed description is done to the present invention:
A kind of wind generator set blade 4 blade pitch device of the present invention, achieves when blade 4 is connected with pitch variable bearings 2 outer ring, carries out the function becoming oar driving from blade 4 inside.
As shown in Figure 1, its concrete structure change oar actuation gear 6 of comprising wheel hub 1, pitch variable bearings 2, blade 4, ring gear 5 and being meshed with ring gear 5.Existing structure adds adapter flange 3, and adapter flange 3 is clipped between pitch variable bearings 2 and blade 4, and adapter flange 3 comprises the outer connection of one along 3.1 and inner wing ring flat-plate 3.2.Pitch variable bearings adopts four-point contact ball, ball is inlayed in centre, single or double, namely inner ring and outer ring can be rotated relatively independently, hold wheel hub 1 to be bolted with the inner ring of pitch variable bearings 2, the outer ring of pitch variable bearings 2, the outer connection of adapter flange 3 are connected by stay bolt along 3.1 with blade 4, and inner wing ring flat-plate 3.2 to be positioned at above ring gear 5 end face and to be connected by bolt.
Conveniently assemble and improve join strength, inner wing ring flat-plate 3.2 inner round portion of adapter flange 3 is connected by bolt with ring gear 5 end face, inner wing ring flat-plate 3.2 inner round portion is lower than inner wing ring flat-plate 3.2 outer perimeter section, and seamlessly transit between inner wing ring flat-plate 3.2 outer perimeter section and inner wing ring flat-plate 3.2 inner round portion, bottom the outer perimeter section of inner wing ring flat-plate 3.2 and between pitch variable bearings 2 inner ring top, leave the space of wearing bolt.Inner wing ring flat-plate 3.2 inner round portion of adapter flange 3 is evenly equipped with some major diameter round holes.Operationally, become oar actuation gear 6 and rotate, drive ring gear 5 to rotate, ring gear 5 drives adapter flange 3 to rotate, thus band moving vane 4 rotates.Within working life, if there are wearing and tearing or damage in ring gear 5, dismountable ring gear 5 and the connecting bolt become between paddle method orchid, ring gear 5 is rotated a certain angle as requested, change ring gear 5 and become oar actuation gear 6 fitting surface, again by ring gear 5 and adapter flange 3 being carried out assembling with bolt and major diameter round hole.
During assembling, first pitch variable bearings 2 is bolted and is arranged on wheel hub 1.Then install for ensureing that ring gear 5 is convenient, first ring gear 5 is fixed on adapter flange 3 by connecting bolt, after ring gear 5 and adapter flange 3 assembly are arranged on pitch variable bearings 2 by fixing bolt, finally install at wheel hub 1 and become oar actuation gear 6, and adjust gears meshing precision.So far workshop is installed and is completed, and after unit is transported to wind field, by self pre-embedded bolt of blade 4 through adapter flange 3 and pitch variable bearings 2, is fastened by bolts.
The above is only the preferred implementation of this patent; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the art of this patent principle; can also make some improvement and replacement, these improve and replace the protection domain that also should be considered as this patent.
Claims (3)
1. a wind generator set blade blade pitch device, comprise wheel hub, pitch variable bearings, blade, ring gear and the change oar actuation gear be meshed with ring gear, it is characterized in that: described pitch variable bearings adopts four-point contact ball, the inner ring of described wheel hub and pitch variable bearings is bolted, adapter flange is accompanied between described pitch variable bearings and blade, described adapter flange comprises outer connection edge and the inner wing ring flat-plate of one, the outer ring of pitch variable bearings, the outer connection edge of adapter flange is connected by stay bolt with blade, described inner wing ring flat-plate to be positioned at above end face of ring gear and to be connected by bolt, described change oar actuation gear is positioned at wheel hub inside.
2. wind generator set blade blade pitch device according to claim 1, it is characterized in that: the inner wing ring flat-plate inner round portion of described adapter flange is connected by bolt with end face of ring gear, inner wing ring flat-plate inner round portion is lower than inner wing ring flat-plate outer perimeter section, and seamlessly transit between inner wing ring flat-plate outer perimeter section and inner wing ring flat-plate inner round portion, bottom the outer perimeter section of inner wing ring flat-plate and leave the space of wearing bolt between the inner ring top of pitch variable bearings.
3. wind generator set blade blade pitch device according to claim 1, is characterized in that: the inner wing ring flat-plate inner round portion of described adapter flange is evenly distributed in major diameter round hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410735749.0A CN104595107A (en) | 2014-12-08 | 2014-12-08 | Blade variable-pitch mechanism of wind generating set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410735749.0A CN104595107A (en) | 2014-12-08 | 2014-12-08 | Blade variable-pitch mechanism of wind generating set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104595107A true CN104595107A (en) | 2015-05-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410735749.0A Pending CN104595107A (en) | 2014-12-08 | 2014-12-08 | Blade variable-pitch mechanism of wind generating set |
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| Country | Link |
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| CN (1) | CN104595107A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108612625A (en) * | 2018-04-23 | 2018-10-02 | 太原重工股份有限公司 | A kind of vane change device with drive disk |
| CN109611273A (en) * | 2018-11-20 | 2019-04-12 | 上海致远绿色能源股份有限公司 | The synchronous vane change device of three guide rods of one kind and its assembly method |
| CN112253385A (en) * | 2020-09-15 | 2021-01-22 | 东方电气风电有限公司 | Novel variable-pitch driving structure of wind generating set |
| US11454219B2 (en) | 2019-05-10 | 2022-09-27 | General Electric Company | Rotor assembly having a pitch bearing with a stiffener ring |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008092447A1 (en) * | 2007-01-31 | 2008-08-07 | Vestas Wind Systems A/S | A wind turbine, a method for servicing a main bearing unit of a wind turbine and use thereof |
| CN101245762A (en) * | 2007-02-14 | 2008-08-20 | 诺德克斯能源有限公司 | Wind energy plant with a pitch bearing |
| CN103221685A (en) * | 2010-11-26 | 2013-07-24 | 维斯塔斯风力系统有限公司 | A pitch system for a wind turbine |
| CN204283729U (en) * | 2014-12-08 | 2015-04-22 | 北车风电有限公司 | A kind of wind generator set blade blade pitch device |
-
2014
- 2014-12-08 CN CN201410735749.0A patent/CN104595107A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008092447A1 (en) * | 2007-01-31 | 2008-08-07 | Vestas Wind Systems A/S | A wind turbine, a method for servicing a main bearing unit of a wind turbine and use thereof |
| CN101245762A (en) * | 2007-02-14 | 2008-08-20 | 诺德克斯能源有限公司 | Wind energy plant with a pitch bearing |
| CN103221685A (en) * | 2010-11-26 | 2013-07-24 | 维斯塔斯风力系统有限公司 | A pitch system for a wind turbine |
| CN204283729U (en) * | 2014-12-08 | 2015-04-22 | 北车风电有限公司 | A kind of wind generator set blade blade pitch device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108612625A (en) * | 2018-04-23 | 2018-10-02 | 太原重工股份有限公司 | A kind of vane change device with drive disk |
| CN109611273A (en) * | 2018-11-20 | 2019-04-12 | 上海致远绿色能源股份有限公司 | The synchronous vane change device of three guide rods of one kind and its assembly method |
| US11454219B2 (en) | 2019-05-10 | 2022-09-27 | General Electric Company | Rotor assembly having a pitch bearing with a stiffener ring |
| CN112253385A (en) * | 2020-09-15 | 2021-01-22 | 东方电气风电有限公司 | Novel variable-pitch driving structure of wind generating set |
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Application publication date: 20150506 |
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| WD01 | Invention patent application deemed withdrawn after publication |