WO2006029593A1 - Windenergieanlage mit elastisch biegsamen rotorblättern - Google Patents
Windenergieanlage mit elastisch biegsamen rotorblättern Download PDFInfo
- Publication number
- WO2006029593A1 WO2006029593A1 PCT/DE2005/001547 DE2005001547W WO2006029593A1 WO 2006029593 A1 WO2006029593 A1 WO 2006029593A1 DE 2005001547 W DE2005001547 W DE 2005001547W WO 2006029593 A1 WO2006029593 A1 WO 2006029593A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- wind
- rotor blade
- profile
- wind turbine
- rotor
- Prior art date
Links
- 239000002131 composite material Substances 0.000 claims description 4
- 239000000835 fiber Substances 0.000 claims description 3
- 239000011152 fibreglass Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 102100040287 GTP cyclohydrolase 1 feedback regulatory protein Human genes 0.000 description 1
- 101710185324 GTP cyclohydrolase 1 feedback regulatory protein Proteins 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Classifications
-
- 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
- F03D1/0608—Rotors characterised by their aerodynamic shape
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2240/00—Components
- F05B2240/20—Rotors
- F05B2240/202—Rotors with adjustable area of intercepted fluid
- F05B2240/2022—Rotors with adjustable area of intercepted fluid by means of teetering or coning blades
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2240/00—Components
- F05B2240/20—Rotors
- F05B2240/21—Rotors for wind turbines
- F05B2240/221—Rotors for wind turbines with horizontal axis
- F05B2240/2213—Rotors for wind turbines with horizontal axis and with the rotor downwind from the yaw pivot axis
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2240/00—Components
- F05B2240/20—Rotors
- F05B2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
- F05B2240/31—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor of changeable form or shape
- F05B2240/311—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor of changeable form or shape flexible or elastic
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2280/00—Materials; Properties thereof
- F05B2280/50—Intrinsic material properties or characteristics
- F05B2280/5001—Elasticity
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2280/00—Materials; Properties thereof
- F05B2280/60—Properties or characteristics given to material by treatment or manufacturing
- F05B2280/6003—Composites; e.g. fibre-reinforced
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2251/00—Material properties
- F05C2251/02—Elasticity
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2253/00—Other material characteristics; Treatment of material
- F05C2253/04—Composite, e.g. fibre-reinforced
-
- 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
Definitions
- the invention relates to a wind energy plant with a tower, a gondola rotatably mounted on the tower about its axis and a rotatably mounted in the nacelle, leeward rotating rotor with at least one rotor blade.
- Wind energy technology has developed very dynamically in recent decades, although this only applies to medium to very large plants for grid parallel operation.
- the use of wind energy to supply the 2 billion people without access to electricity could play an important role.
- the invention has for its object to provide a wind turbine of the type ge called, in which the loads on the entire structure of the wind energy plant is limited by the wind pressure in extreme wind conditions.
- this object is achieved by the formation of at least ei ⁇ NEN rotor blade with a flexural rigidity of the blade profile in the direction of impact, which allows the elastic deflection of the rotor blade by more than half of its extended length.
- the flexural rigidity of the rotor blade allows its deflection to be more than two-thirds of its length.
- the projected wind attack surface is considerably reduced by this strong deflection, and on the other hand, the resistance coefficient is significantly reduced outwardly due to the strong curvature of the blades that accompanies the deflection. Both of these effects can reduce the wind thrust on the entire system to half in extreme wind conditions, compared to systems that use stiff blades. This saves material used for the load-transmitting Kom ⁇ components such as rotor shaft, machine housing, vertical storage, tower, bracing and foundation and thus significantly reduces the manufacturing cost of the system.
- the large deflection is made possible by the use of thin aerodynamic profiles in conjunction with the use of high-strength materials with a simultaneously low modulus of elasticity. This leads to the fact that even with the large deflections the permissible material expansions and stresses are not exceeded.
- the preferably used relative profile thickness ie the ratio of absolute profile thickness to absolute profile depth, is between 0.05 and 0.15.
- a preferred embodiment is characterized in that the profile thickness and the tread depth over the entire length of the blade are the same. This embodiment allows the at least one rotor blade to be an extruded fiber composite profile. If a fiberglass composite (GFRP) is used as the fiber composite material, the requirement for high strength and at the same time a relatively low modulus of elasticity is met.
- GFRP fiberglass composite
- FIG. 1 shows a side view of the wind power plant according to the invention with non-bent rotor blades, indicated by the arrow wind direction, and
- Fig. 2 is a representation corresponding figure 1 with braked system in bent by extreme wind rotor blades
- Fig. 3 shows the profile contour of an extruded rotor blade with (in the drawing) coming from below wind, as well as the direction of impact S, and
- FIG. 4 shows the deflection of a rotor blade at different wind speeds in relation to blade length B and deflection D.
- Fig. 1 shows the wind turbine with tower 10 and the Turmabhard 12.
- the nacelle 14 On the tower 10, the nacelle 14 is arranged rotatably about its axis.
- the rotor 16 is mounted in the nacelle 14 and rotates on the leeward side, ie on the side of the tower 10 facing away from the wind.
- the leaves are not or only slightly bent.
- the blades are attached to the hub with a cone angle, ie a tilted arrangement in the wind direction, so that the centrifugal forces and the wind thrust forces are adjusted during operation of the system in such a way that no bending elements arise approximately at the blade root.
- the system At wind speeds above the Abschalt ⁇ wind speed, the system is slowed down and brought to a standstill.
- Fig. 2 shows the system in the braked state at extreme wind speed.
- the wind boosts the leaves by more than two-thirds of their stretched length flexed. Due to this strong deflection, the wind load is significantly reduced because the wind attack surface is reduced. Furthermore, the resistance coefficient of the profile is reduced due to the strong inclination of the blade with respect to the flow direction.
- Fig. 3 shows a thin aerodynamic profile with a relative profile thickness of about 8%. This means that the measure of the largest profile thickness 20 in relation to the tread depth 22 is 0.08. As a result, the profile cross-section has a low rigidity in the direction of impact, and the wind load can greatly bend the blade in the direction of impact.
- the bending stiffness is chosen so that it allows an elastic deflection of the leaves of 70% of the stretched blade length at a wind speed of 70 m / s.
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP05791823A EP1789677A1 (de) | 2004-09-18 | 2005-09-05 | Windenergieanlage mit elastisch biegsamen rotorblättern |
US11/611,319 US20070098555A1 (en) | 2004-09-18 | 2006-12-15 | Wind turbine comprising elastically flexible rotor blades |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004045401A DE102004045401A1 (de) | 2004-09-18 | 2004-09-18 | Windenergieanlage mit elastisch biegsamen Rotorblättern |
DE102004045401.9 | 2004-09-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006029593A1 true WO2006029593A1 (de) | 2006-03-23 |
Family
ID=35431363
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2005/001547 WO2006029593A1 (de) | 2004-09-18 | 2005-09-05 | Windenergieanlage mit elastisch biegsamen rotorblättern |
Country Status (5)
Country | Link |
---|---|
US (1) | US20070098555A1 (de) |
EP (1) | EP1789677A1 (de) |
CN (1) | CN1997822A (de) |
DE (1) | DE102004045401A1 (de) |
WO (1) | WO2006029593A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2484148A (en) * | 2010-10-02 | 2012-04-04 | Duncan James Parfitt | Windmill with apertured flexible vanes |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7582977B1 (en) * | 2005-02-25 | 2009-09-01 | Clipper Windpower Technology, Inc. | Extendable rotor blades for power generating wind and ocean current turbines within a module mounted atop a main blade |
US8430636B2 (en) * | 2007-12-05 | 2013-04-30 | Thomas V. Wagner | Wind turbine rotor assembly |
GB2470589A (en) * | 2009-05-29 | 2010-12-01 | Vestas Wind Sys As | Branching spar wind turbine blade |
US8596978B2 (en) * | 2009-11-25 | 2013-12-03 | Pioneer Energy Products, Llc | Wind turbine |
US9709029B2 (en) | 2011-06-21 | 2017-07-18 | University Of Virginia Patent Foundation | Morphing segmented wind turbine and related method |
US9039367B2 (en) * | 2011-06-30 | 2015-05-26 | Educational Foundation Bunri Gakuen | Propeller windmill for small-sized power generator |
DE102014204591B3 (de) * | 2014-03-12 | 2015-04-02 | Voith Patent Gmbh | Bidirektional anströmbare Horizontalläuferturbine mit passiver Überlastsicherung |
CN104343643B (zh) * | 2014-09-24 | 2017-01-25 | 王东明 | 一种升力型弹性增效风车叶片 |
US9509036B2 (en) | 2015-03-05 | 2016-11-29 | Pioneer Energy Products, Llc | Communications units with high capacity low profile antenna arrangements |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2546884A1 (de) * | 1975-10-20 | 1977-04-21 | Goslich Hans Dietrich | Windturbinenfluegel mit ueberlastsicherung |
US4366387A (en) * | 1979-05-10 | 1982-12-28 | Carter Wind Power | Wind-driven generator apparatus and method of making blade supports _therefor |
DE19807477A1 (de) * | 1997-09-30 | 1999-04-08 | Deutsch Zentr Luft & Raumfahrt | Rotor |
WO2002073031A1 (en) * | 2001-03-14 | 2002-09-19 | Benny Klemar | A wind turbine wing |
US20040052640A1 (en) * | 2002-09-12 | 2004-03-18 | Ghazi Khan | All weather windmills |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2345600A1 (fr) * | 1975-06-09 | 1977-10-21 | Bourquardez Gaston | Eolienne a paliers fluides |
DE3126692A1 (de) * | 1980-12-17 | 1983-02-10 | Hilarius 4300 Essen Drzisga | Windturbine |
DE8122496U1 (de) * | 1981-07-31 | 1985-10-31 | Lepoix, Louis L., 7570 Baden-Baden | Vorrichtung zur Umwandlung der kinetischen Energie des Windes in eine andere Energieart, vorzugsweise in elektrische Energie |
DK100497A (da) * | 1997-09-04 | 1997-09-04 | Novo Nordisk As | Kemisk forbindelse |
-
2004
- 2004-09-18 DE DE102004045401A patent/DE102004045401A1/de not_active Withdrawn
-
2005
- 2005-09-05 EP EP05791823A patent/EP1789677A1/de not_active Withdrawn
- 2005-09-05 CN CNA2005800190005A patent/CN1997822A/zh active Pending
- 2005-09-05 WO PCT/DE2005/001547 patent/WO2006029593A1/de active Application Filing
-
2006
- 2006-12-15 US US11/611,319 patent/US20070098555A1/en not_active Abandoned
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2546884A1 (de) * | 1975-10-20 | 1977-04-21 | Goslich Hans Dietrich | Windturbinenfluegel mit ueberlastsicherung |
US4366387A (en) * | 1979-05-10 | 1982-12-28 | Carter Wind Power | Wind-driven generator apparatus and method of making blade supports _therefor |
DE19807477A1 (de) * | 1997-09-30 | 1999-04-08 | Deutsch Zentr Luft & Raumfahrt | Rotor |
WO2002073031A1 (en) * | 2001-03-14 | 2002-09-19 | Benny Klemar | A wind turbine wing |
US20040052640A1 (en) * | 2002-09-12 | 2004-03-18 | Ghazi Khan | All weather windmills |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2484148A (en) * | 2010-10-02 | 2012-04-04 | Duncan James Parfitt | Windmill with apertured flexible vanes |
Also Published As
Publication number | Publication date |
---|---|
DE102004045401A1 (de) | 2006-03-30 |
US20070098555A1 (en) | 2007-05-03 |
CN1997822A (zh) | 2007-07-11 |
EP1789677A1 (de) | 2007-05-30 |
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