CN105673317A - Hinging mechanism for blades of large wind generating set - Google Patents
Hinging mechanism for blades of large wind generating set Download PDFInfo
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- CN105673317A CN105673317A CN201610162743.8A CN201610162743A CN105673317A CN 105673317 A CN105673317 A CN 105673317A CN 201610162743 A CN201610162743 A CN 201610162743A CN 105673317 A CN105673317 A CN 105673317A
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- wind
- blade
- wheel hub
- support arm
- hub
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- 238000010408 sweeping Methods 0.000 claims abstract description 20
- 238000006243 chemical reaction Methods 0.000 claims description 30
- 238000005452 bending Methods 0.000 claims description 14
- 230000001105 regulatory effect Effects 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 101100244014 Neurospora crassa (strain ATCC 24698 / 74-OR23-1A / CBS 708.71 / DSM 1257 / FGSC 987) ppi-5 gene Proteins 0.000 description 2
- 101150023294 PIN4 gene Proteins 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000004083 survival effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 210000003746 feather Anatomy 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 230000007306 turnover 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
- F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor
- F03D1/06—Rotors
- F03D1/065—Rotors characterised by their construction elements
- F03D1/0658—Arrangements for fixing wind-engaging parts to a hub
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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
-
- 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)
- 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)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Wind Motors (AREA)
Abstract
The invention discloses a hinging mechanism for blades of a large wind generating set. The hinging mechanism comprises a hub, wherein more than three hub cantilevers are uniformly arranged along the periphery of the hub; the root parts of the hub cantilevers are in rigid connection with the hub; the top end of each hub cantilever is hinged to a hinging hole at the top end of the support arm of a paddle blade through a second hinge pin; a hinging hole at the lower end of each support arm is hinged to the top end of a hydraulic cylinder through a third hinge pin; the bottom end of each hydraulic cylinder is hinged to a hinging hole at the root part of the corresponding hub cantilever through a first hinge pin; the hydraulic cylinders, the hub cantilevers and the support arms form rectangular connection; each paddle blade consists of the corresponding blade and the corresponding support arm which are rigidly connected; the blades can be rotated for a certain angle around hinge points at the top ends of the hub cantilevers through telescopic adjustment of the hydraulic cylinders; and through the rotation of the certain angle, the air-sweeping area of the wind wheel of a wind generator can be changed, and the pneumatic performance of the wind generator is changed, so that the stress of the wind generator and wind power captured by the wind generator are accordingly adjusted.
Description
Technical field
The present invention relates to technical field of wind power generation, particularly a kind of Large-scale Wind TurbinesBlade linkwork.
Background technology
Adopting Large-scale Wind Turbines and wind-powered electricity generation is delivered to electrical network is on a large scale that wind-powered electricity generation is openedThe most important mode of sending out. Wind energy size is subject to the variable effect of wind speed very large, and the variation tool of wind speedHave very strong randomness, therefore wind energy is the very unsettled energy of one. And wind-driven generatorThe electric energy that group is sent will be delivered to electrical network, just requires wind power generating set to have comparatively stablePower stage, and power output also will be subject to the restriction of dispatching of power netwoks. The randomness of wind energy and electricityNet receives the desired power stability of wind-powered electricity generation conflicting, and for this contradiction of balance, this justThe power adjusting ability of wind power generating set has been proposed to very high requirement. On the one hand, work as wind speedHour, wind energy conversion system is wanted to catch more wind energy as far as possible, obtains higher generated output to carryHigh yield, on the other hand, when wind speed reach full send out and above wind speed after, require wind-force functionEnough by self-regulation, guaranteed output nonoverload, maintains and completely sends out power or according to electrical network requirementReduce generated output.
Wind energy conversion system power adjusting mode mainly comprises the blade of fixed pitch wind power generating set at presentThe feather angle of stall-adjusted and pitch-controlled wind-driven generator group regulates. The master of fixed pitch wind turbineWant design feature to be, Wind wheel paddle and wheel hub are to be fixedly rigidly connected, stiff, adopt and loseSpeed Principles of Regulation, depend on the airfoil structure design of blade uniqueness, airfoil structure complexity, designWith manufacture difficulty, a little less than power adjusting ability. Blade and the wheel of pitch-controlled wind-driven generator group wind wheelHub connects by bearing, and when required power regulates, blade rotates an angle relative to wheel hub, changesBecome the propeller pitch angle of blade, thereby changed the ability of blade capturing wind energy, thereby played adjustingThe object of wind power generating set power output, this regulative mode has larger power adjusting modelEnclose, but this wind energy conversion system wheel hub structure complexity is manufactured maintenance cost high, poor reliability.
Summary of the invention
For overcoming above-mentioned technical disadvantages, the present invention proposes a kind of Large-scale Wind Turbines bladeLinkwork, can be in the power adjusting that realizes in a big way wind power generating set.
In order to achieve the above object, technical scheme of the present invention is:
A kind of Large-scale Wind Turbines blade linkwork, comprises wheel hub 1, and wheel hub 1 is along weekTo the wheel hub cantilever 3 being evenly equipped with more than three, each wheel hub cantilever 3 tops and root respectively have oneIndividual hinge hole, wheel hub cantilever 3 roots and wheel hub 1 are rigidly connected, wheel hub cantilever 3Top is hinged by the top hinge hole of the support arm 6 of the second bearing pin 4 and blade 9, support arm6 bottom hinge holes and hydraulic cylinder 8 tops by the 3rd bearing pin 7 hinged, hydraulic cylinder 8 bottoms withWheel hub cantilever 3 root hinge holes are hinged by the first bearing pin 2, hydraulic cylinder 8, wheel hub cantilever 3Forming a triangle with support arm 6 is connected.
Described blade 9 is made up of blade 10 and support arm 6, and blade 10 and support arm 6 are firmLinking together of property, is provided with hinge hole at the two ends of support arm 6.
Described hydraulic cylinder 8 adopts telescoping hydraulic cylinder.
The power regulating method of described a kind of Large-scale Wind Turbines blade linkwork is:In the time that hydraulic cylinder 8 is flexible, by support arm 6 jack-up or retract, drive blade 9 around the second bearing pin4 turn an angle, and realize the control of blade 10 around wheel hub cantilever 3 top different rotation angleSystem, forms the bending of blade 9 around root intuitively, is called blade bending, all hydraulic cylinder 8Action simultaneously, can realize pneumatic equipment blades made along the same angle of wheel hub cantilever 3 summit rotating photos,Form blade bending and control, wind wheel wind sweeping area is stretched or shrink, wind wheel wind sweeping area changesAfter, the ability of wind energy conversion system capturing wind energy changes thereupon, regulates wind energy conversion system power thereby reachObject.
The effect that the present invention is useful is:
1, be beneficial under the low wind speed of wind energy conversion system and start. Due to the wheel hub 1 having adopted with wheel hub cantilever 3,Constant in the situation that, be equivalent to increase rotor diameter, wind wheel wind sweeping area in blade 9 lengthIncreased, due to radially outer moving of blade 9 centre of lifts, wind wheel has been had larger simultaneouslyStaring torque, thereby make wind energy conversion system under low wind speed more easily start.
2, make the wind energy conversion system can be in the operation of high wind speed district more. Reach wind energy conversion system at wind speed and completely send out windAfter speed, if wind speed continues to raise, extend and regulate by hydraulic cylinder 8, make blade 9 around wheelThe pin joint on hub cantilever 3 tops rotates to an angle, and forms blade bending, has reduced wind wheel and has sweptWind area acts on the pneumatic effect on blade 9 because blade bending has weakened wind simultaneously, makesThe ability of wind wheel capturing wind energy declines, thereby ensures that wind energy conversion system can be steady at power under high wind speed moreDetermine and nonoverload. Common large scale wind power machine cut-out wind speed is generally 25m/s at present, and adoptsThis linkwork and regulative mode, more than wind energy conversion system cut-out wind speed is expected to reach 30m/s.
3, expanded wind energy conversion system high wind speed district power regulating range. By regulating blade bending angleSpend, can in a big way, change the wind sweeping area of wind mill wind wheel, reduce moment simultaneously,Therefore,, in high wind speed district, can adjust in the larger context the power of wind energy conversion system, especiallyWhen wind speed is smaller compared with large and network load demand, can realize the low merit of wind-driven generatorRate running, at this moment wind power generating set is with larger spinning reserve capacity running, for electrical networkScheduling and stable operation are highly beneficial.
4, improve survival ability under wind energy conversion system extreme wind speeds. Under the extreme wind regime such as typhoon, logicalCross wind machine oar leaf bending and make wind wheel sweep wind face to be contracted to minimum, and driftage is to sweeping wind face and wind directionParallel angle, stoppage protection. The comparable general wind energy conversion system wind sheltering mode at present of the present invention is dwindledBlade wind area approximately 10%～20%, thereby wind energy conversion system is reduced at extreme wind regime lower stress,Wind resistance strengthens to some extent, has improved the survival ability of wind power generating set under extreme wind regime.
Brief description of the drawings
Fig. 1 is the structural representation of the embodiment of the present invention.
Fig. 2 is the structural representation of blade 9 in Fig. 1.
Fig. 3 is wheel hub 1 structural representation with wheel hub cantilever 3 in Fig. 1.
Fig. 4 be in the time that linkwork action makes blade turn over δ angle wind wheel wind sweeping area by halfFootpath is R1Be changed to R2Schematic diagram.
Fig. 5 is power curves of wind-driven generator sets figure.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention will be described.
As shown in Figure 1, a kind of Large-scale Wind Turbines blade linkwork, comprises wheel hub 1,Wheel hub 1 is along being circumferentially evenly equipped with three wheel hub cantilevers 3, and each wheel hub cantilever 3 tops and root are eachHave a hinge hole, wheel hub cantilever 3 roots and wheel hub 1 are rigidly connected, wheel hub cantilever3 top is hinged by the top hinge hole of the support arm 6 of the second bearing pin 4 and blade 9,Brace 6 bottom hinge holes and hydraulic cylinder 8 tops are hinged by the 3rd bearing pin 7,8 ends of hydraulic cylinderEnd is hinged by the first bearing pin 2 with wheel hub cantilever 3 root hinge holes, and hydraulic cylinder 8, wheel hub hangArm 3 forms a triangle with support arm 6 and is connected.
As shown in Figure 2, described blade 9 is made up of blade 10 and support arm 6, blade 10With linking together of support arm 6 rigidity, in the axis 11 of blade 10 and support arm 6The angle of axis 12 is β, and β=120 ° are provided with hinge hole at the two ends of support arm 6.
As shown in Figure 3, three described wheel hub cantilever 3 length are 2m, three wheel hub cantilevers3 are equally distributed on 1 three directions of wheel hub by α=hexagonal angle degree.
Described hydraulic cylinder 8 adopts telescoping hydraulic cylinder.
The power regulating method of described a kind of Large-scale Wind Turbines blade linkwork is:In the time that hydraulic cylinder 8 is flexible, by support arm 6 jack-up or retract, drive blade 9 around the second bearing pin4 turn an angle, and realize the control of blade 10 around wheel hub cantilever 3 top different rotation angleSystem, forms the bending of blade 9 around root intuitively, is called blade bending, three cover hydraulic cylinders 8Action simultaneously, can realize pneumatic equipment blades made along the same angle of wheel hub cantilever 3 summit rotating photos,Form blade bending and control, wind wheel wind sweeping area is stretched or shrink, wind wheel wind sweeping area changesAfter, the ability of wind energy conversion system capturing wind energy changes thereupon, regulates wind energy conversion system power thereby reach.
In the present embodiment, with reference to Fig. 3, wheel hub cantilever 3 is apart from the height H=2.5m of pivot,Blade 9 blade tips to the length of blade 9 root pin joints is 28m, in the time that blade 9 launches completely,The axis 11 of blade 10 overlaps with the axis 5 of place wheel hub cantilever 3, now wind wheel revolution halfFootpath R1=30.5m, wind sweeping area reaches maximum 2921m2, wherein, due to wheel hub 1 revolution halfIn footpath, not absorbing wind energy, is invalid wind sweeping area, invalid wind sweeping area 19.6m2, account for and always sweep wind0.67% of area, illustrates the increasing of the invalid wind sweeping area causing due to the increase of wheel hub 1 diameterAdd very little, little on the impact of wind energy conversion system capturing wind energy.
As shown in Figure 4, when linkwork action, drive blade 9 along wheel hub cantilever 3 topsPin joint rotation δ angle, in the time of δ=90 °, wind mill wind wheel is swept wind diameter and is contracted toR2=28.1m, wind sweeping area is 2481.4m2, wind sweeping area subtracts while expansion completely than blade 9Little by 15%, the ability of this wind generator set blade linkwork to wind wheel capturing wind energy is describedThere is good regulating action.
As shown in Figure 5, Fig. 5 is the power of the present embodiment wind power generating set, whereinBlock curve is made up of two sections of a, b, is the peak power of wind power generating set under each wind speedCurve, dashed curve c is minimum power curve, the region d between two lines is wind-power electricity generationUnit can, for the power bracket regulating, be realized the merit of Large-scale Wind Turbines under corresponding wind speedRate regulates, and in the time that wind energy conversion system starts, controls by hydraulic cylinder 8, adjusts blade 10 axis 11Overlap with the axis 5 of blade 10 place wheel hub cantilevers 3, so that wind energy conversion system staring torque maximum,The starting point of wind power generating set operating point a section in Fig. 5; Less and need to increase wind at wind speedWhen power acc power, hydraulic cylinder 8 shrinks, and pulls blade 9 bottom support arms 6, makes blade10 reduce with respect to the anglec of rotation δ of wheel hub cantilever 3, reduce blade bending angle, whenWhen blade 10 axis 11 overlap with the axis 5 of wheel hub cantilever 3, wind energy conversion system reaches EIAJ,The a section of wind power generating set operating point in Fig. 5; After wind speed reaches and completely sends out wind speed, logicalCross elongation hydraulic cylinder 8, jack-up blade 9 bottom support arms 6, make blade 10 outstanding with respect to wheel hubThe anglec of rotation δ of arm 3 increases, and at this moment wind wheel wind sweeping area reduces thereupon, can ensure at windSpeed reaches wind energy conversion system when completely sending out more than wind speed, makes the wind energy that wind energy conversion system is caught be stabilized in full sending outPower and nonoverload, the b section of wind power generating set operating point in Fig. 5; When electrical network demand subtractsHour, by extending hydraulic cylinder 8, jack-up blade 9 bottom support arms 6, make blade 9 relativeAnglec of rotation δ in wheel hub cantilever 3 increases, and at this moment wind wheel wind sweeping area reduces thereupon, reducesThe wind energy that wind energy conversion system is caught, thus wind power generating set generated output is reduced, wind-driven generatorThe d region of group operating point in Fig. 5; After wind speed exceedes cut-out wind speed, wind energy conversion system is shut down,Hydraulic cylinder 8 is stretched to stroke limit, promotes support arm 6 and moves, and blade 9 is around wheel hub cantilever 3Top the second bearing pin 4 rotates, and makes axis 5 angles of blade 10 axis 11 and wheel hub cantilever 3δ reaches maximum, and wind wheel wind sweeping area is contracted to minimum, and wind energy conversion system is gone off course to making wind energy conversion system windWheel place plane and wind direction parallel direction.
Claims (4)
1. a Large-scale Wind Turbines blade linkwork, comprises wheel hub (1), its spyLevy and be: wheel hub (1) is along being circumferentially evenly equipped with three above wheel hub cantilevers (3), each wheelHub cantilever (3) top and root respectively have a hinge hole, wheel hub cantilever (3) root and wheel hub(1) be rigidly connected, the top of wheel hub cantilever (3) by the second bearing pin (4) andThe top hinge hole of the support arm (6) of blade (9) is hinged, and support arm (6) bottom is hingedHole and hydraulic cylinder (8) top by the 3rd bearing pin (7) hinged, hydraulic cylinder (8) bottom withWheel hub cantilever (3) root hinge hole is hinged by the first bearing pin (2), hydraulic cylinder (8), wheelHub cantilever (3) forms a triangle with support arm (6) and is connected.
2. a kind of Large-scale Wind Turbines blade linkwork according to claim 1,It is characterized in that: described blade (9) is made up of blade (10) and support arm (6), leafLinking together of sheet (10) and support arm (6) rigidity, establishes at the two ends of support arm (6)There is hinge hole.
3. a kind of Large-scale Wind Turbines blade linkwork according to claim 1,It is characterized in that: described hydraulic cylinder (8) adopts telescoping hydraulic cylinder.
4. a kind of Large-scale Wind Turbines blade linkwork according to claim 1Power regulating method be it is characterized in that: in the time that hydraulic cylinder (8) is flexible, by support arm(6) jack-up or retract, drives blade (9) to turn an angle around the second bearing pin (4),Realize the control of blade (10) around wheel hub cantilever (3) top different rotation angle, intuitivelyForm the bending of blade (9) around root, be called blade bending, all hydraulic cylinder (8) simultaneouslyAction, can realize pneumatic equipment blades made along the same angle of wheel hub cantilever (3) summit rotating photo,Form blade bending and control, wind wheel wind sweeping area is stretched or shrink, wind wheel wind sweeping area changesAfter, the ability of wind energy conversion system capturing wind energy changes thereupon, regulates wind energy conversion system power thereby reach.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610162743.8A CN105673317B (en) | 2016-03-21 | 2016-03-21 | A kind of Large-scale Wind Turbines vane hinge mechanism |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610162743.8A CN105673317B (en) | 2016-03-21 | 2016-03-21 | A kind of Large-scale Wind Turbines vane hinge mechanism |
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| CN105673317A true CN105673317A (en) | 2016-06-15 |
| CN105673317B CN105673317B (en) | 2018-11-09 |
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| CN201610162743.8A Active CN105673317B (en) | 2016-03-21 | 2016-03-21 | A kind of Large-scale Wind Turbines vane hinge mechanism |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110374793A (en) * | 2019-07-02 | 2019-10-25 | 中国大唐集团新能源科学技术研究院有限公司 | Variable-length pneumatic equipment bladess device |
| CN111089032A (en) * | 2020-01-13 | 2020-05-01 | 李大伟 | High-power adjustable vertical axis wind generating set and control method |
| CN112513455A (en) * | 2018-08-01 | 2021-03-16 | 维斯塔斯风力系统有限公司 | Method for controlling the blade tip height of a wind turbine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006133715A1 (en) * | 2005-06-17 | 2006-12-21 | Lm Glasfiber A/S | A blade with hinged blade tip |
| EP2336556A1 (en) * | 2008-09-25 | 2011-06-22 | Sonkyo, S.L. | Device for adjusting the blade pitch of a wind generator |
| CN103047084A (en) * | 2012-12-22 | 2013-04-17 | 广州红鹰能源科技有限公司 | Umbrella-type wind power generating set and working method |
| CN204003282U (en) * | 2014-05-30 | 2014-12-10 | 西安交通大学 | A kind of Novel wind power generator blade of variable area |
| CN205578179U (en) * | 2016-03-21 | 2016-09-14 | 中国华能集团清洁能源技术研究院有限公司 | Wind generating set blade hinge mechanisms |
-
2016
- 2016-03-21 CN CN201610162743.8A patent/CN105673317B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006133715A1 (en) * | 2005-06-17 | 2006-12-21 | Lm Glasfiber A/S | A blade with hinged blade tip |
| EP2336556A1 (en) * | 2008-09-25 | 2011-06-22 | Sonkyo, S.L. | Device for adjusting the blade pitch of a wind generator |
| CN103047084A (en) * | 2012-12-22 | 2013-04-17 | 广州红鹰能源科技有限公司 | Umbrella-type wind power generating set and working method |
| CN204003282U (en) * | 2014-05-30 | 2014-12-10 | 西安交通大学 | A kind of Novel wind power generator blade of variable area |
| CN205578179U (en) * | 2016-03-21 | 2016-09-14 | 中国华能集团清洁能源技术研究院有限公司 | Wind generating set blade hinge mechanisms |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112513455A (en) * | 2018-08-01 | 2021-03-16 | 维斯塔斯风力系统有限公司 | Method for controlling the blade tip height of a wind turbine |
| CN112513455B (en) * | 2018-08-01 | 2023-08-22 | 维斯塔斯风力系统有限公司 | Method for operating a wind turbine and wind turbine |
| CN110374793A (en) * | 2019-07-02 | 2019-10-25 | 中国大唐集团新能源科学技术研究院有限公司 | Variable-length pneumatic equipment bladess device |
| CN111089032A (en) * | 2020-01-13 | 2020-05-01 | 李大伟 | High-power adjustable vertical axis wind generating set and control method |
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| Publication number | Publication date |
|---|---|
| CN105673317B (en) | 2018-11-09 |
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