AU2558001A - Wind turbine rotor, and hub and extender therefor - Google Patents
Wind turbine rotor, and hub and extender therefor Download PDFInfo
- Publication number
- AU2558001A AU2558001A AU25580/01A AU2558001A AU2558001A AU 2558001 A AU2558001 A AU 2558001A AU 25580/01 A AU25580/01 A AU 25580/01A AU 2558001 A AU2558001 A AU 2558001A AU 2558001 A AU2558001 A AU 2558001A
- Authority
- AU
- Australia
- Prior art keywords
- rotor
- hub
- coupling
- extender
- coupling means
- 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.)
- Granted
Links
- 239000004606 Fillers/Extenders Substances 0.000 title claims description 20
- 239000002131 composite material Substances 0.000 claims description 31
- 230000008878 coupling Effects 0.000 claims description 30
- 238000010168 coupling process Methods 0.000 claims description 30
- 238000005859 coupling reaction Methods 0.000 claims description 30
- 238000010276 construction Methods 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 11
- 238000013016 damping Methods 0.000 claims description 4
- 239000011159 matrix material Substances 0.000 claims description 3
- 230000002787 reinforcement Effects 0.000 claims description 3
- 229910001018 Cast iron Inorganic materials 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- RLQJEEJISHYWON-UHFFFAOYSA-N flonicamid Chemical compound FC(F)(F)C1=CC=NC=C1C(=O)NCC#N RLQJEEJISHYWON-UHFFFAOYSA-N 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000003351 stiffener Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000003466 welding 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
- F03D1/065—Rotors characterised by their construction elements
- F03D1/0658—Arrangements for fixing wind-engaging parts to a hub
-
- 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
- F03D1/0691—Rotors characterised by their construction elements of the hub
-
- 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
- F05B2240/10—Stators
- F05B2240/14—Casings, housings, nacelles, gondels or the like, protecting or supporting assemblies there within
-
- 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
- F05B2240/90—Mounting on supporting structures or systems
- F05B2240/91—Mounting on supporting structures or systems on a stationary structure
- F05B2240/912—Mounting on supporting structures or systems on a stationary structure on a tower
-
- 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
- F05B2240/90—Mounting on supporting structures or systems
- F05B2240/91—Mounting on supporting structures or systems on a stationary structure
- F05B2240/912—Mounting on supporting structures or systems on a stationary structure on a tower
- F05B2240/9121—Mounting on supporting structures or systems on a stationary structure on a tower on a lattice tower
-
- 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
- F05B2240/90—Mounting on supporting structures or systems
- F05B2240/91—Mounting on supporting structures or systems on a stationary structure
- F05B2240/913—Mounting on supporting structures or systems on a stationary structure on a mast
-
- 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
- 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
-
- 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
- Y02E10/728—Onshore wind turbines
Description
WO 01/42647 PCT/NLOO/00872 WIND TURBINE ROTOR, AND HUB AND EXTENDER THEREFOR The invention relates to a rotor for a wind turbine, which wind turbine comprises: a support construction, for instance a post, a 5 column or a spatial tube construction; and a generator supported by this support construction and having an outward protruding horizontal shaft which is rotatably mounted and carries a generator rotor forming part of the generator; 10 which rotor comprises the following rotor parts: a hub with first coupling means for releasable rigid coupling of the hub in coaxial relation to the end of the shaft; and 15 a number of blades which are coupled rigidly and releasably to the hub by means of respective second coupling means via the ends of their respective blade roots. The hub of a known wind turbine rotor is 20 embodied in cast iron. The drawback of a cast iron hub, particularly for large rotors, is that they are very heavy due to the nature of the material and the necessary mechanical properties and safety margins. 25 It is an object of the invention to embody a rotor for a wind turbine such that, with retention and even improvement of the required mechanical properties and while retaining the required safety margins, it can be substantially lighter and can be manufactured more 30 cheaply. It is another object of the invention to embody a rotor such that it is interchangeable with existing cast iron rotors without adaptation.
WO 01/42647 PCT/NLOO/00872 2 In respect of the above the rotor according to the invention has the special feature that the hub and each blade root consists of composite material. The main function of the hub is to carry the 5 bending moments introduced at the blade flanges and to transfer the torsional moment through the shaft flange to the drive train unit. It is important to split the function of the hub for: 10 a) bending moment and b) torsion moment considering following design rules: * optimising the outer shell for the bending moments between the blade flanges and the main shaft 15 flange; * tailoring of the outer shell with adequate lay-up to the stress flow * minimizing laminate thickness so that ideally all areas have the same stress level, thus utilizing the 20 material homogeneously, and avoiding stress concentrations. An access hole is necessary for mounting and maintenance. The root section of rotor blades are usually 25 made of composite materials, thus a composite cylinder is connected to the hub flange. The metal flange connects with nearly the same geometry this cylinder to a metal part, thus resulting in a big increase of stiffness. There exist basically three design concepts: 30 . ball geometry . triangle geometry . ball with integrated extenders A composite material is defined as a material comprising at least two components with mutually 35 differing properties, particularly in respect of strength and rigidity.
WO 01/42647 PCT/NLOO/00872 3 There also exist composite materials comprising a fibre reinforcement embedded in a plastic mass or matrix. A specific embodiment of the rotor according to 5 the invention has the special feature that the second coupling means comprise an extender, both ends of which can be rigidly and releasably coupled to the hub and the end of the relevant blade root by means of third and fourth coupling means, which extender consists of 10 composite material. An extender is an element for arranging between a blade root and the root of a rotor blade whereby the effective rotor diameter will be increased while maintaining the blade lengths, thus increasing the swept 15 area and consequently the energy production. A prerequisite here is that the generator and the blades have a sufficient electrical and mechanical capacity. The use of composite material for the hub and blade roots has the further advantage compared to cast 20 iron that a composite material is not subject to corrosion. A specific embodiment has the special feature that the hub has a central hole for accommodating the end of the shaft. 25 A very light but nevertheless strong construction can be obtained with an embodiment in which the hub is hollow and the central hole is bounded by a cylindrical bush. Easy to manufacture is an embodiment wherein 30 the hub consists of mutually adhered hub parts. In order to achieve a great mechanical rigidity and strength the rotor can in accordance with a particular aspect of the invention have the special feature that the hub comprises two mutually adhered 35 shells and said bush, which bush is adhered to at least one of the shells by a number of shores, which shores consist of composite material. Likewise in order to increase mechanical strength and rigidity, the rotor can WO 01/42647 PCT/NLOO/00872 4 in accordance with an aspect of the invention have the special feature in the latter embodiment that the cylinder comprises an inner cylinder adhered to the one shell and an outer cylinder adhered to the other shell. 5 The rotor can also be designed such that the shells are mutually adhered along a plane extending substantially transversely of the axis of the hub. The above discussed rotor with the hub consisting of diverse components also has the advantage 10 compared to cast iron that the hollow form can be realized by assembling a number of components. Composite materials can be adhered to each other relatively simply and with a great strength and lifespan, for instance with glue or a welding process. Such'an adhesion has been 15 found to be very reliable in other applications. A known cast iron hub consists of a substantially homogeneous cast iron mass. The local mechanical properties cannot therefore vary from place to place. As a result the rotor must generally be 20 overdimensioned such that it complies with stringent safety margins. In contrast to this known art the invention provides in accordance with a particular aspect a rotor in which the composite material of the relevant rotor 25 part is a plastic matrix and a reinforcement of fibres embedded therein, wherein the density and direction of the fibres are chosen such that at every position the rotor part complies with requirements set on the basis of predicted mechanical loads in respect of mechanical 30 strength, rigidity and damping. With this embodiment the rotor can satisfy very stringent safety requirements and nevertheless be of very light construction. A rotor according to the invention can for instance be optimized by mechanical analyses, on the basis of which the density 35 and direction of the fibres can be locally chosen in optimal manner. In addition, using for instance casting techniques and special moulds, the wall thickness can be reduced locally in areas of lower load. Use of the above WO 01/42647 PCT/NLOO/00872 5 stated shores can make a substantial contribution to the lower weight of the rotor. In accordance with yet another aspect of the invention the rotor has the special feature that the 5 first, second, third and/or fourth coupling means comprise screw bolts and nuts co-acting therewith which engage on the respective two rotor parts for mutual coupling. In this embodiment the rotor preferably has the 10 special feature that the screw bolts are ordered in an annular configuration. The annular form can correspond in particular to a general circle shape. The variant is recommended in this respect wherein the screw bolts extend in the direction of the 15 local tensile force during operation of the wind turbine such that they are subjected only to respective tensile forces. In order to enable realization of for instance a diameter transition, the rotor can have the special 20 feature that said coupling means comprise flange means placed between the rotor parts for mutual coupling, in particular an annular flange, wherein said two rotor parts are each coupled to the flange means with an individual annular configuration of screw bolts, both of 25 which configurations are substantially placed concentrically. The invention further relates to a hub for a wind turbine rotor of the described type. This hub consists according to the invention of composite 30 material. The invention likewise relates to an extender as specified above for a wind turbine rotor according to the invention. This extender also consists of composite material. 35 The following considerations are applicable: - integration of rotor blades, blade root, extender, blade flange and hub into one system with the composite material WO 01/42647 PCT/NLOO/00872 6 - maintaining the same allowable external forces on the blade flanges, an iron hub can be easily substituted by a composite hub (exchangeability of blades) 5 - using composite material means not only a simple material substitution. The composite part is a consequence of the consideration of . design . production methods 10 . material properties. Taking into account the excellent properties in fibre direction, the lay-up direction of the composite hub can be tailoring according to the stress flow in the hub. Furthermore, the wall thickness can be minimized in 15 regions of minor loading. The design with composite also allows to introduce stiffeners, in order to achieve a high stiffness/weight ratio. Also, it is quite common to use steel extenders, which are quite expensive, to enlarge the 20 rotor diameter. Here, the innovative idea is to define a complete rotor system. This rotor system consists of: . rotor blades . blade root extenders.(in order to increase 25 the swept area using the same blades), . blade root adapters (in order to allow the installation of blades and hubs with different pitch circle diameters) . hub 30 All these components can be made of composite materials. Thus, the complete rotating system can be made of the same material. This influences especially the system dynamics (moment of inertia, mass, material damping, and material structural stiffness) and the noise 35 emission (transfer of structural born noise from the drive train unit through the hub to the rotor blades). The hub stiffness is essential for both static and dynamic behaviour of the complete rotor system. For WO 01/42647 PCT/NLOO/00872 7 example, a minimum stiffness in flapwise direction is required for maintaining a minimum distance between the blade tip and the tower in the maximum static load case (extreme load while the turbine is running). Additional, 5 the dynamic movements of one blade should not be transferred to other blades, as the hub is the foundation of the dynamic component rotor blade. Thus, from the system dynamic point of view, the stiffness/flexibility has to be optimised so that the rotor does not suffer 10 from large vibrations in resonance situations. Large movements, expressed by a high flexibility, allow the dynamic system "rotor" to react more smoothly to extreme loading, for example gusts, which is usually known by teetering hubs. For example, 15 the flange section of a standard cast iron hub is about eight times stiffer (product E x 1) than the composite blade root section, only taking into account the different Young's modulus (E = 21.000 MPa for glass fibre/epoxy composites and E = 20 170.000 Mpa for GGG 40), while the moment of inertia I is approximately the same. For the interesting phenomenon called "edgewise vibrations", the optimisation of the hub stiffness in edgewise direction can contribute, together with improved material damping, to a reduction of 25 problems in this area. The invention will now be elucidated with reference to the annexed drawings. Herein: figure 1 shows a perspective view of a wind turbine according to the invention; 30 figure 2 shows a partly cut-away perspective view of an essential part of the rotor as indicated with II in figure 1; figure 3 shows a cut-away perspective view of detail III of figure 2; 35 figure 4 is a cut-away perspective view of another embodiment of a hub according to the invention; figure 5 is a broken-away perspective view of detail V of figure 4; WO 01/42647 PCT/NLOO/00872 8 figure 6 shows in partly broken-away perspective view a hub with three blade roots coupled thereto; figure 7 is a cut-away perspective view of 5 detail VII of figure 6; figure 8 shows a schematic perspective view of a part of a rotor according to the invention, wherein the constituent parts are shown for the sake of clarity at some mutual distance; 10 figure 9 shows in perspective view two shells for manufacturing a hub; figure 10 is a perspective view of a shell with a central bush adhered thereto; figure 11 is a perspective view of the shell 15 with the bush of figure 10, wherein the construction is strengthened by shores; figure 12 is a perspective view of a finished hub. Figure 1 shows a wind turbine 1 comprising a 20 support construction 2 embodied as a post, an electrical generator 3 supported thereby and having a shaft (not shown) which carries a hub 4, to which hub three blades 5 are connected in angularly equidistant relation. Figure 2 shows hub 4. This takes a hollow form 25 and carries blades 5 via blade roots 6. On the front of hub 4 is situated a hole 7 through which the interior of the hub is accessible. On the rear of the hub is likewise situated a hole, which is designated 8 and surrounded by a ring or holes 9. Generator shaft 10 bears on its end a 30 flange 11 with a ring of holes 12 which can be placed in register with the ring or holes 9. Coupling bolts can be placed through the respective holes 9 and 12 to couple hub 4 to flange 11. Blade roots 6 are coupled to hub 4 in analogous 35 manner. Each blade root bears a T-bolt 13 (see figure 3). This is a bolt which co-acts with an associated insert 14 in root 6, which insert 14 is provided with a threaded hole for coupling to bolt 13. On the other side the bolt WO 01/42647 PCT/NLOO/00872 9 13 co-acts with a nut 15 extending in the inner cavity of hub 4. For this purpose a ring of holes 16 is arranged in the hub round the three respective holes 17. Arranging and tightening of said fixing bolts and nuts can take 5 place via hole 7. Hub 4 consists of composite material, as does blade root 6. Figure 4 shows a hub 17 which takes a completely hollow form. In order to accommodate the end 10 of a generator shaft (not shown), hub 17 has a central bush 18 comprising an outer bush 19 and an inner bush 20. Hub 17 consists of two shells 21,22 as will be described below with reference to figures 9,10,11 and 12. Shells 21,22 are mutually adhered via a plane extending 15 transversely of the rotation axis 23 of hub 17. This corresponds with the adhesion seams designated 24. A blade root 25 is connected to hub 17. The bush 18, or at least the inner bush 20 thereof is, for the present invention, regarded as a 20 separate component from the hub 17. Therefore it can be manufactured from metal, steel or the like. It can also have a different shape in cross section, for example square, triangular, etc. Figure 5 shows the manner in which the 25 respective diameters of respective holes 117' and blade roots 25 are adapted to each other. Use is made of an annular flange 26 which is coupled respectively to hub 17 and each blade root 25 by means of respective rings of T-bolts 27. The 30 specification of the T-bolt structure has already been given with reference to figures 2 and 3. Attention is drawn to a difference between the structure of figure 3 and that of figure 5. Bolts 13 according to figure 3 are in principle only under strain 35 of tension in their axial direction. In the structure according to figure 5 it is not possible as a result of the different diameters of the rings 27 and 28 to prevent WO 01/42647 PCT/NLOO/00872 10 a torque being exerted on annular flange 26 in combination with a lateral force component on bolts 13. Figure 6 shows a hub 29, of which the parts 31 directed toward blade roots 30 take a form such that they 5 connect smoothly onto these blade roots 30. Figure 7 shows the T-bolt construction with which blade roots 30 are fixed to said parts 31. said end parts 31 are provided with continuous holes in which is accommodated a support element 32 provided with a 10 continuous hole. Similarly to the rod-like elements 14, support element 32 is mechanically strong, being manufactured for instance from steel. Just as insert 14, it serves to distribute the tensile force in bolt 13 over the available surface, i.e. the surfaces directed towards 15 each other of insert 14 and support element 13. It is noted that the shown structure is very suitable due to the high mechanical strength of the applied composite materials for both hub 29 and blade root 30. Figure 8 shows schematically the structure 20 shown in figure 2, wherein the blades are effectively lengthened by applying the respective extenders 33. These latter are likewise manufactured from composite material and can be coupled rigidly and releasably in any appropriate manner to hub 4 on one side and the 25 associated blade root 6 on the other. Extenders 33 can for instance be coupled to hub 4 in the manner shown in figure 3, while the coupling to blade root 6 is for instance embodied in the manner shown in figure 7. Figure 9 shows the two shells 21 and 22 as 30 according to figure 4. Figure 10 shows that inner bush 20 is adhered to shell 22. Figure 11 shows that shores 33 are adhered between shell 22 and inner bush 20. This results in a 35 substantial stiffening and strengthening while retaining the low weight. After outer bush 19 has been adhered in similar manner to shell 21 (or is already formed thereon during WO 01/42647 PCT/NLOO/00872 11 the production process), shells 21,22 can be permanently coupled to each other along the plane defined by adhesion seams 24 as according to figure 4. After this process the hub 17 is finished. 5 It is noted that the mention of the required holes has been omitted in this description, for which aspect reference is made to for instance figure 4. It is further noted, that in the light of the present invention, the bush described above and shown in 10 figs. 4 and 10 is not necessarily considered a part of the hub, but rather as a coupling for arranging the hub on the generator shaft which is for instance shown - in a different attachment configuration - in fig. 2. Therefore the bush can, contrary to the hub according to the 15 invention, be manufactured from metal, steel, etc. The bush can also have a different cross section shape than circular, e.g. square, triangular, etc.
Claims (15)
1. Rotor for a wind turbine, which wind turbine comprises: a support construction, for instance a post, a column or a spatial tube construction; and 5 a generator supported by this support construction and having an outward protruding horizontal shaft which is rotatably mounted and carries a generator rotor forming part of the generator; which rotor comprises the following rotor 10 parts: a hub with first coupling means for releasable rigid coupling of the hub in coaxial relation to the end of the shaft; and a number of blades which are coupled rigidly 15 and releasably to the hub by means of respective second coupling means via the ends of their respective blade roots; characterized in that the hub and each blade root consist of 20 composite material.
2. Rotor as claimed in claim 1, wherein the second coupling means comprise an extender, both ends of which can be rigidly and releasably coupled to the hub and the end of the relevant blade root by means of third 25 and fourth coupling means, which extender consists of composite material.
3. Rotor as claimed in claim 1, wherein the hub has a central hole for accommodating the end of the shaft. 30
4. Rotor as claimed in claim 3, wherein the hub is hollow and the central hole is bounded by a cylindrical bush.
5. Rotor as claimed in claim 4, wherein the hub consists of mutually adhered hub parts. WO 01/42647 13 PCT/NLOO/00872
6. Rotor as claimed in claim 5, wherein the hub comprises two mutually adhered shells and said bush, which bush is adhered to at least one of the shells by a number of shores, which shores consist of composite 5 material.
7. Rotor as claimed in claim 6, wherein the cylinder comprises an inner cylinder adhered to the one shell and an outer cylinder adhered to the other shell.
8. Rotor as claimed in claim 6, wherein the 10 shells are mutually adhered along a plane extending substantially transversely of the axis of the hub.
9. Rotor as claimed in claim 1, wherein the composite material of the relevant rotor part is a plastic matrix and a reinforcement of fibres embedded 15 therein, wherein the density and direction of the fibres are chosen such that at every position the rotor part complies with requirements set on the basis of predicted mechanical loads in respect of mechanical strength, rigidity and damping. 20
10. Rotor as claimed in claim 1, wherein the first, second, third and/or fourth coupling means comprise screw bolts and nuts co-acting therewith which engage on the respective two rotor parts for mutual coupling. 25
11. Rotor as claimed in claim 10, wherein the screw bolts are ordered in an annular configuration.
12. Rotor as claimed in claim 11, wherein the screw bolts extend in the direction of the local tensile force during operation of the wind turbine such that they 30 are subjected only to respective tensile forces.
13. Rotor as claimed in claims 10 and 11, wherein said coupling means comprise flange means placed between the rotor parts for mutual coupling, in particular an annular flange, wherein said two rotor 35 parts are each coupled to the flange means with an individual annular configuration of screw bolts, both of which configurations are substantially placed concentrically. WO 01/42647 14 PCT/NL00/00872
14. Hub for a wind turbine rotor as claimed in any of the claims 1-13, which hub comprises: first coupling means for releasable rigid coupling of the hub in coaxial relation to the end of a 5 generator rotor shaft; and second coupling means for releasable rigid coupling to the hub of a number of blades via the ends of their respective blade roots; characterized in that 10 the hub consists of composite material.
15. Extender for a wind turbine rotor as claimed in any of the claims 1-13, which extender comprises: third coupling means for releasable rigid 15 coupling of the one end of the extender to a hub as claimed in claim 14; and fourth coupling means for releasable rigid coupling of the other end of the extender to a blade root; 20 characterized in that the extender consists of composite material.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL1013807A NL1013807C2 (en) | 1999-12-09 | 1999-12-09 | Wind turbine rotor, as well as hub and extender therefor. |
NL1013807 | 1999-12-09 | ||
PCT/NL2000/000872 WO2001042647A2 (en) | 1999-12-09 | 2000-11-29 | Wind turbine rotor, and hub and extender therefor |
Publications (2)
Publication Number | Publication Date |
---|---|
AU2558001A true AU2558001A (en) | 2001-06-18 |
AU773676B2 AU773676B2 (en) | 2004-06-03 |
Family
ID=19770404
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AU25580/01A Ceased AU773676B2 (en) | 1999-12-09 | 2000-11-29 | Wind turbine rotor, and hub and extender therefor |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1238196A2 (en) |
AU (1) | AU773676B2 (en) |
NL (1) | NL1013807C2 (en) |
RU (1) | RU2002118216A (en) |
WO (1) | WO2001042647A2 (en) |
Families Citing this family (71)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19733372C1 (en) * | 1997-08-01 | 1999-01-07 | Aloys Wobben | Rotor blade and rotor of a wind turbine |
NL1014719C2 (en) | 2000-03-22 | 2001-09-25 | Aerpac Holding B V | Wind turbine, has asymmetrically arranged turbine vanes to reduced stall induced vibrations |
DE10034958A1 (en) * | 2000-07-19 | 2002-02-07 | Aloys Wobben | rotor blade hub |
DE10201726B4 (en) * | 2002-01-18 | 2004-10-21 | Wobben, Aloys, Dipl.-Ing. | Wind turbine |
USRE41326E1 (en) * | 2003-04-12 | 2010-05-11 | General Electric Company | Reinforced hub for the rotor of a wind energy turbine |
DE10324166B4 (en) * | 2003-05-28 | 2005-05-04 | Aloys Wobben | Rotor blade connection |
EP1486415A1 (en) * | 2003-06-12 | 2004-12-15 | SSP Technology A/S | Wind turbine blade and method of manufacturing a blade root |
US7381029B2 (en) * | 2004-09-30 | 2008-06-03 | General Electric Company | Multi-piece wind turbine rotor blades and wind turbines incorporating same |
DK176176B1 (en) | 2004-11-24 | 2006-11-27 | Siemens Wind Power As | Method and connector for assembling a blade, preferably wind turbine blade, into sections |
DE102005026141B4 (en) | 2005-06-06 | 2019-07-25 | Imo Momentenlager Gmbh | Wind turbine with a bearing unit for an elongated rotor blade |
DE102005063678B3 (en) | 2005-06-06 | 2020-01-23 | Imo Momentenlager Gmbh | Method for operating a wind turbine with a bearing unit for an elongated rotor blade |
DE102005047959B4 (en) * | 2005-10-06 | 2008-01-31 | Nordex Energy Gmbh | Method for producing a bushing in a fiber composite material and rotor blade for a wind turbine with a bushing |
US7438533B2 (en) * | 2005-12-15 | 2008-10-21 | General Electric Company | Wind turbine rotor blade |
US7517194B2 (en) * | 2006-04-30 | 2009-04-14 | General Electric Company | Rotor blade for a wind turbine |
DE102006022272C5 (en) | 2006-05-11 | 2013-07-25 | Repower Systems Ag | Rotor blade connection |
DE102006031174B3 (en) * | 2006-07-03 | 2007-10-25 | Repower Systems Ag | Wind power plant rotor hub for rotor, has rotor blade, where hub core body and hub external body are connected by flange connection, where flange connection with pre-determined inclination is designed as rotational axis of rotor |
US7614850B2 (en) * | 2006-07-11 | 2009-11-10 | General Electric Company | Apparatus for assembling rotary machines |
KR100801301B1 (en) | 2006-08-10 | 2008-02-11 | 원인호 | Sunlight Wheel Windmill |
DE102006041383B4 (en) * | 2006-08-29 | 2008-07-03 | Euros Entwicklungsgesellschaft für Windkraftanlagen mbH | Wind energy plant with cone-shaped rotor blades |
DE602007010088D1 (en) * | 2007-02-09 | 2010-12-09 | Stx Heavy Ind Co Ltd | Rotor blade for a wind energy plant |
WO2008107738A1 (en) * | 2007-03-06 | 2008-09-12 | Tecsis Tecnologia E Sistemas Avançados Ltda | Fan blade connection |
FR2917458B1 (en) * | 2007-06-13 | 2009-09-25 | Snecma Sa | EXHAUST CASING HUB COMPRISING STRESS DISTRIBUTION RIBS |
CA2593459A1 (en) * | 2007-07-04 | 2009-01-04 | Jacques Olivier | Wind turbine |
ES2367933B1 (en) | 2008-04-09 | 2012-09-17 | Gamesa Innovation & Technology, S.L. | PALA ROOT EXTENSOR. |
DE102008021498A1 (en) * | 2008-04-29 | 2009-11-05 | Repower Systems Ag | Method for manufacturing a blade connection of a rotor blade, a blade connection and a fastening element for a blade connection |
ES2371403B1 (en) * | 2008-10-16 | 2012-11-21 | Gamesa Innovation & Technology S.L. | PALA ROOT EXTENSOR FOR A WINDER. |
WO2010070767A1 (en) | 2008-12-19 | 2010-06-24 | 三菱重工業株式会社 | Rotor head for wind power generator, and wind power generator |
WO2011050806A2 (en) * | 2009-10-27 | 2011-05-05 | Vestas Wind Systems A/S | Blade hub adaptor |
ES2359310B2 (en) * | 2009-11-10 | 2012-05-16 | Gamesa Innovation & Technology S.L. | AEROGENERATOR WITH IMPROVED INTERNAL ACCESS VESSELS. |
US8066490B2 (en) | 2009-12-21 | 2011-11-29 | General Electric Company | Wind turbine rotor blade |
US20130177444A1 (en) | 2009-12-21 | 2013-07-11 | Vestas Wind Systems A/S | Hub for a wind turbine and a method for fabricating the hub |
DE102010010283A1 (en) | 2010-03-04 | 2011-09-08 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | Rotor hub in fiber composite construction for wind turbines |
US8025485B2 (en) * | 2010-06-17 | 2011-09-27 | General Electric Company | Wind turbine blade attachment configuration with flattened bolts |
CN102338045A (en) * | 2010-07-16 | 2012-02-01 | 上海电气风电设备有限公司 | Wind wheel lengthening ring |
US8696315B2 (en) * | 2010-08-16 | 2014-04-15 | General Electric Company | Hub for a wind turbine and method of mounting a wind turbine |
DE202010013535U1 (en) | 2010-09-24 | 2010-12-02 | Repower Systems Ag | Blade connection of a rotor blade of a wind energy plant |
US9739258B2 (en) | 2011-03-30 | 2017-08-22 | Vestas Wind Systems A/S | Hub for a wind turbine |
EP2532882A1 (en) * | 2011-06-10 | 2012-12-12 | General Electric Company | System and methods for assembling a wind turbine with a pitch assembly |
DE102011051172A1 (en) | 2011-06-17 | 2012-12-20 | Lars Kästner | Laminated rotor blade for wind turbine, has several pultrusion portions that are arranged at surface of insert portion, and are coated with fiber or woven fabric tube that is longer than that of insert portion |
EP2554834B1 (en) * | 2011-08-02 | 2016-07-13 | Alstom Wind, S.L.U. | Rotor for a wind turbine |
CN102345569A (en) * | 2011-10-14 | 2012-02-08 | 内蒙古航天亿久科技发展有限责任公司 | Novel wind wheel structure of large wind generating set |
DE102011088025A1 (en) | 2011-12-08 | 2013-06-13 | Wobben Properties Gmbh | Rotor blade for horizontal axle wind turbine, has anchoring element anchored in blade outer part, counter element anchored in blade inner part, and connecting bolts reaching through counter element and fastened in anchoring element |
CN103184977B (en) * | 2011-12-31 | 2015-11-25 | 新疆金风科技股份有限公司 | Fan blade connecting means, draught fan impeller and wind power generating set |
CN102518569A (en) * | 2012-01-11 | 2012-06-27 | 保定华翼风电叶片研究开发有限公司 | Blade for wind driven generator and wind driven generator with same |
US9239040B2 (en) * | 2012-02-16 | 2016-01-19 | General Electric Company | Root end assembly configuration for a wind turbine rotor blade and associated forming methods |
BR112014019590A2 (en) | 2012-02-17 | 2018-09-11 | Gamesa Innovation & Technology, S.L. | direct drive wind generator |
NZ701921A (en) * | 2012-05-30 | 2016-10-28 | youWINenergy GmbH | Blade assembly for a wind turbine rotor |
US9074581B2 (en) | 2012-06-12 | 2015-07-07 | General Electric Company | Cone angle insert for wind turbine rotor |
US9109578B2 (en) | 2012-06-12 | 2015-08-18 | General Electric Company | Root extender for a wind turbine rotor blade |
AU2013301474A1 (en) * | 2012-08-10 | 2015-03-12 | youWINenergy GmbH | Segmented rotor hub |
GB2509082B (en) * | 2012-12-19 | 2015-06-17 | Gurit Uk Ltd | Turbine Blade |
GB2512608B (en) * | 2013-04-03 | 2015-09-16 | Aviat Entpr Ltd | Rotor blade |
GB2517935A (en) * | 2013-09-05 | 2015-03-11 | Mainstream Renewable Power Ltd | Wind turbine blade extender |
DE102014202459A1 (en) * | 2014-02-11 | 2015-08-13 | Siemens Aktiengesellschaft | Connecting element for connecting a bearing device of a rotor blade to be connected to a rotor hub of a wind turbine with a mounting flange of the rotor hub |
DE102014005452B4 (en) * | 2014-04-07 | 2015-12-24 | Windnovation Engineering Solutions Gmbh | Blade connection for rotor blades |
DE102014206670A1 (en) * | 2014-04-07 | 2015-10-08 | Wobben Properties Gmbh | Rotor blade of a wind turbine |
BR112016023218B1 (en) * | 2014-04-07 | 2022-08-30 | Wobben Properties Gmbh | ROTOR BLADES, WIND TURBINE, AND METHOD FOR PRODUCTION OF A ROTOR BLADES |
EP2937556B1 (en) * | 2014-04-25 | 2018-02-21 | Siemens Aktiengesellschaft | Flange of a wind turbine |
DE102014215966A1 (en) | 2014-08-12 | 2016-02-18 | Senvion Gmbh | Rotor blade extension body and wind turbine |
DE102014226126A1 (en) | 2014-12-16 | 2016-06-16 | Senvion Gmbh | Rotor hub for a rotor axis of a rotor of a wind turbine |
US10507902B2 (en) | 2015-04-21 | 2019-12-17 | General Electric Company | Wind turbine dome and method of assembly |
DE102016110551A1 (en) | 2016-06-08 | 2017-12-14 | Wobben Properties Gmbh | Rotor for a wind turbine, rotor blade for a wind turbine, sleeve and method for mounting a rotor |
US11022093B2 (en) | 2016-12-28 | 2021-06-01 | Vestas Wind Systems A/S | Joint for connecting a wind turbine rotor blade to a rotor hub and associated methods |
WO2018121823A1 (en) * | 2016-12-28 | 2018-07-05 | Vestas Wind Systems A/S | Hub segments and hub assemblies for connecting a wind turbine blade to a rotor shaft and associated methods |
DE102017003061B4 (en) | 2017-03-30 | 2022-11-24 | Albany Engineered Composites, Inc. | connection element |
EP3483428A1 (en) * | 2017-11-08 | 2019-05-15 | Nordex Energy GmbH | Agent for increasing the bending stiffness of load bearing components of a wind turbine |
EP3581790A1 (en) * | 2018-06-14 | 2019-12-18 | Siemens Gamesa Renewable Energy A/S | Wind turbine rotor blade |
EP3690232B1 (en) * | 2019-01-31 | 2023-01-04 | Siemens Gamesa Renewable Energy A/S | Hub for a wind turbine, wind turbine and method for up-grading a hub of a wind turbine |
US11105317B2 (en) | 2019-02-21 | 2021-08-31 | 21st Century Wind, Inc. | Wind turbine generator for low to moderate wind speeds |
EP4105478A1 (en) | 2021-06-15 | 2022-12-21 | General Electric Renovables España S.L. | Supporting structures and methods for a central frame of a direct-drive wind turbine |
EP4116574A1 (en) * | 2021-07-05 | 2023-01-11 | Siemens Gamesa Renewable Energy A/S | Root assembly of a wind turbine blade for a wind turbine, wind turbine blade and wind turbine |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4236873A (en) * | 1978-09-20 | 1980-12-02 | United Technologies Corporation | Wind turbine blade retention device |
US4260332A (en) * | 1979-03-22 | 1981-04-07 | Structural Composite Industries, Inc. | Composite spar structure having integral fitting for rotational hub mounting |
US4420354A (en) * | 1982-06-14 | 1983-12-13 | Gougeon Brothers, Inc. | Process for securing projecting studs in the ends of wood resin composite bodies and the like and the structure formed thereby |
US4915590A (en) * | 1987-08-24 | 1990-04-10 | Fayette Manufacturing Corporation | Wind turbine blade attachment methods |
DE19733372C1 (en) * | 1997-08-01 | 1999-01-07 | Aloys Wobben | Rotor blade and rotor of a wind turbine |
-
1999
- 1999-12-09 NL NL1013807A patent/NL1013807C2/en not_active IP Right Cessation
-
2000
- 2000-11-29 RU RU2002118216/06A patent/RU2002118216A/en not_active Application Discontinuation
- 2000-11-29 AU AU25580/01A patent/AU773676B2/en not_active Ceased
- 2000-11-29 EP EP00989036A patent/EP1238196A2/en not_active Withdrawn
- 2000-11-29 WO PCT/NL2000/000872 patent/WO2001042647A2/en not_active Application Discontinuation
Also Published As
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NL1013807C2 (en) | 2001-07-05 |
AU773676B2 (en) | 2004-06-03 |
WO2001042647A3 (en) | 2002-01-31 |
WO2001042647A2 (en) | 2001-06-14 |
RU2002118216A (en) | 2004-01-27 |
EP1238196A2 (en) | 2002-09-11 |
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