[go: up one dir, main page]

WO2025027009A1 - Procédé de moulage d'une pale d'éolienne à l'aide de préformes - Google Patents

Procédé de moulage d'une pale d'éolienne à l'aide de préformes Download PDF

Info

Publication number
WO2025027009A1
WO2025027009A1 PCT/EP2024/071523 EP2024071523W WO2025027009A1 WO 2025027009 A1 WO2025027009 A1 WO 2025027009A1 EP 2024071523 W EP2024071523 W EP 2024071523W WO 2025027009 A1 WO2025027009 A1 WO 2025027009A1
Authority
WO
WIPO (PCT)
Prior art keywords
preform
blade
preforms
mold cavity
drawer
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.)
Pending
Application number
PCT/EP2024/071523
Other languages
English (en)
Inventor
Henrik BARSLEV
Bosky PATEL
Gerrit Jan De Jong
Hao Li
Oscar LOPEZ PEREZ
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LM Wind Power AS
LM Wind Power Spain SL
Ge Renewable Management
LM Wind Power Blades France SAS
LM Wind Power R&D Holland BV
Original Assignee
LM Wind Power AS
LM Wind Power Spain SL
Ge Renewable Management
LM Wind Power Blades France SAS
LM Wind Power R&D Holland BV
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by LM Wind Power AS, LM Wind Power Spain SL, Ge Renewable Management, LM Wind Power Blades France SAS, LM Wind Power R&D Holland BV filed Critical LM Wind Power AS
Publication of WO2025027009A1 publication Critical patent/WO2025027009A1/fr
Anticipated expiration legal-status Critical
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28—Shaping operations therefor
    • B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
    • B29C70/541—Positioning reinforcements in a mould, e.g. using clamping means for the reinforcement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C31/00—Handling, e.g. feeding of the material to be shaped, storage of plastics material before moulding; Automation, i.e. automated handling lines in plastics processing plants, e.g. using manipulators or robots
    • B29C31/04—Feeding of the material to be moulded, e.g. into a mould cavity
    • B29C31/08—Feeding of the material to be moulded, e.g. into a mould cavity of preforms to be moulded, e.g. tablets, fibre reinforced preforms, extruded ribbons, tubes or profiles; Manipulating means specially adapted for feeding preforms, e.g. supports conveyors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D99/00—Subject matter not provided for in other groups of this subclass
    • B29D99/0025—Producing blades or the like, e.g. blades for turbines, propellers, or wings
    • B29D99/0028—Producing blades or the like, e.g. blades for turbines, propellers, or wings hollow blades
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B11/00—Making preforms
    • B29B11/14—Making preforms characterised by structure or composition
    • B29B11/16—Making preforms characterised by structure or composition comprising fillers or reinforcement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/08—Blades for rotors, stators, fans, turbines or the like, e.g. screw propellers
    • B29L2031/082—Blades, e.g. for helicopters
    • B29L2031/085—Wind turbine blades
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

  • the present invention relates to a method of manufacturing a wind turbine blade part, such as a shell half of a wind turbined blade, and to a blade mold assembly for carrying out a method according to the present invention.
  • Wind turbines typically comprise a tower, generator, gearbox, nacelle, and one or more rotor blades, which capture kinetic energy of wind using known airfoil principles. With increasing energy demand, modern wind turbines can have power ratings of above 10 MW and may have rotor blades that exceed 100 meters in length.
  • Wind turbine rotor blades are typically made from a fiber- re info reed polymer material, comprising a pressure side shell half and a suction side shell half, also called blade halves.
  • the cross-sectional profile of a typical blade includes an airfoil for creating an air flow leading to a pressure difference between both sides. The resulting lift force generates torque for producing electricity.
  • the shell halves of rotor blades are often manufactured using blade molds.
  • a blade gel coat or primer is applied to the mold.
  • fiber reinforcement and/or fabrics are placed into the mold followed by resin infusion.
  • a vacuum is typically used to draw resin material, such as epoxy, polyester and/or vinyl ester, into the mold.
  • prepreg technology can be used in which a fiber or fabric pre-impregnated with resin forms a homogenous material which can be introduced into the mold.
  • Several other molding techniques are known for manufacturing wind turbine blades, including compression molding and resin transfer molding.
  • the shell halves are assembled by being glued or bolted together substantially along a chord plane of the blade. In blade manufacturing processes, the use of preforms has become increasingly important.
  • a preform is a shaped arrangement of fibers, such as multiple layers thereof, which has been bound and/or consolidated for later use as part of the fiber lay-up in the blade mold.
  • the rationale for using preforms for blade manufacturing is to reduce cycle time in the blade mold.
  • using preforms may reduce the number of required repairs due to the pre-consolidated structure of the preforms.
  • using preforms for blade lay-up adds efficiency and precision.
  • multiple preforms will be used in manufacturing a wind turbine blade. This usually requires a large space for manufacturing and transferring the preforms to the blade mold.
  • a shell half of a modern wind turbine blade may comprise different preforms of 20 or more slightly different geometries, which provides certain challenges in particular with regard to transferring the different preforms from their respective preform molds to the blade mold, and with respect to arrangement of multiple preforms in the blade mold.
  • Known solutions include the use of a plurality of different transfer jigs in combination with lifting devices such as cranes. However, this may be a tedious and costly process, in particular as manual labor is typically still required for the correct preform placement in the blade mold.
  • the layup process of the preforms in the blade mold can be complicated and ergonomically challenging, in particular for large blades for which multiple preforms are required.
  • the layup process and the correct positioning of the preforms can be difficult, also due to the steep geometry of the molding cavity at the root end.
  • the present invention addresses one or more of the above-discussed objects by providing a method of manufacturing a wind turbine blade part, the method comprising the steps of providing a plurality of preforms, preferably including a first, second and third preform, each preform comprising a fiber material and a binding agent, arranging the plurality of preforms in a blade mold comprising a blade mold cavity, a root end, a tip end, and opposing first and second lateral edges extending along a longitudinal direction of the blade mold between the root end and the tip end, infusing resin to the blade mold cavity, and curing and/or hardening the resin in order to form the blade part, wherein arranging the plurality of preforms in the blade mold cavity comprises placing the first preform into the blade mold cavity, preferably from the root end of the blade mold, such that the first preform extends along the longitudinal direction of the blade mold, and such that the first preform is arranged at a longitudinal central axis of the mold cavity, placing the second preform into the blade mold cavity,
  • the method of the present invention is found to be ergonomically beneficial as compared to known layup methods for manufacturing wind turbine blades.
  • the layup process is simplified in that the first preform can be used as anchoring element for subsequent preforms.
  • gravity can be efficiently used to apply three-dimensional glass fiber preforms into the blade mold.
  • the method of the present invention is found to enable a faster layup process by eliminating wrinkle defects in the resulting shell laminate.
  • the step of arranging the plurality of preforms in the blade mold cavity comprises placing a first preform into the blade mold cavity such that the first preform extends along the longitudinal direction of the blade mold, and such that the first preform is arranged at the longitudinal central axis of the mold cavity, placing a second preform into the blade mold cavity from the first lateral edge of the blade mold, such that the second preform slides within the mold cavity until the second preform abuts the first preform along a first longitudinally extending interface, and placing a third preform into the blade mold cavity from the second lateral edge of the blade mold such that the third preform slides within the mold cavity until the third preform abuts the first preform along a second longitudinally extending interface.
  • the wind turbine blade part is a root laminate, a main laminate or a part thereof.
  • the blade part is a blade half or shell half, such as a pressure side shell half or a suction side shell half.
  • the wind turbine blade part is a bulkhead.
  • the wind turbine blade part is a shear web.
  • the wind turbine blade part is a shell half, such as a pressure side shell half or a suction side shell half.
  • the blade mold cavity preferably conforms to a shape of at least a portion of a wind turbine blade.
  • the blade mold is a mold for a half shell of a wind turbined blade, preferably extending over the whole length of the blade.
  • the plurality of preforms for manufacturing the wind turbine blade part may include at least 10 preforms, preferably at least 20 preforms, such as at least 30 preforms.
  • the preforms used in the method of the present invention are a consolidated arrangement of material comprising fibers, such as glass fibers, and a binding agent.
  • the material comprising fibers may be a fabric.
  • the preform will typically be used for manufacturing a blade half of a wind turbine blade.
  • the preforms can be placed within the root region of a blade mold, thus constituting part of the root laminate of the blade.
  • the root region may correspond to a region of the blade having a substantially circular or elliptical cross-section.
  • the preforms could also be used for other parts and regions of a wind turbine blade, such as trailing edge or leading edge reinforcements or adhesive flanges.
  • the preforms could be used for a full blade layup, or the central load carrying laminates as the main laminate.
  • each of the preforms used in the method of the present invention is configured to form a blade section starting from the root end of the wind turbine blade.
  • each of the preforms is configured to be arranged at the root end of the blade mold.
  • the preform is configured to form a subsection of the root section extending from the root end of the blade together with other subsections of the root section equally extending from the root end of the blade.
  • the preforms are elongate preforms.
  • Each preform typically has a thickness, a width and a length.
  • each preform has a length-width ratio of at least 5:1.
  • each preform has a length-width ratio of at least 5:1 , such as at least 10:1.
  • each preform has a length-width ratio of at least 15:1.
  • each preform has a length-width ratio of up to 100:1. It is preferred that the preforms are substantially plate-shaped, preferably as a rectangular plate. Typically, each preform will be shaped like cuboid or rectangular prism.
  • the preform may comprise on or more trapezoid shaped surfaces, such as opposing trapezoid shaped surfaces.
  • one or more of the preforms have the shape of a trapezoidal prism.
  • Such preform shape is found to be particularly useful when forming, for example, a trailing edge, a flatback section or a shear web of a wind turbine blade.
  • the first preform can be shaped like a rectangular prism and the second and third preforms can each be shaped like a trapezoidal prism.
  • each preform has a length of at least 5 meters, preferably at least 10 meters. In a preferred embodiment, each preform has a width of 1-5 meters, preferably 1-3 meters. The thickness of each preform is typically between 1 and 20 mm, preferably between 1 and 10 mm.
  • Each preform comprises a fiber material and a binding agent.
  • the fiber material may comprise glass fibers, carbon fibers or a combination thereof. In another embodiment, the fiber material may include fiber rovings, such as glass fiber rovings.
  • Such binding agent is preferably present in an amount of 0.1-15 wt% relative to the weight of the fiber material.
  • the binding agent may also be present in an amount of 10-20 gram per square meter of glass surface. In other embodiments, the binding agent may be present in an amount of 1-100 gram per square meter of glass surface.
  • the binding agent may also be present in an amount of 5-40, preferably 10-20, gram per square meter of fiber surface. In preferred embodiments, the binding agent is present in an amount of 0.5-5 wt%, preferably 0.5-2.5 wt%, relative to the weight of the fiber material.
  • the binding agent is a thermoplastic binding agent.
  • the binding agent may comprise a polyester, preferably a bisphenolic polyester.
  • a suitable binding agent is a polyester marketed under the name NEOXI L 940.
  • NEOXIL 940 PMX NEOXIL 940 KS 1 and NEOXIL 940 HF 2B, all manufactured by DSM Composite Resins AG.
  • Another example is a polyester resin marketed under the name C.O.I.M. FILCO® 661 FPG 005, which is a bisphenolic unsaturated polyester resin in powder form.
  • the binding agent is a polyester, preferably a bisphenolic polyester.
  • the binding agent is a hotmelt adhesive or based on a prepreg resin.
  • the preform comprises an epoxy material.
  • the binding agent is a thermoplastic binding agent.
  • the fiber material comprises fiber rovings which are at least partially joined together by means of the binding agent by thermal bonding.
  • the fiber material comprises a fabric.
  • a plurality of fabrics may be joined by the binding agent, e.g., disposed in between layers of fabric.
  • the joining of the fiber material, such as a plurality of fabrics is done without stitching or kitting.
  • the binding agent is a binding powder, such as a thermoplastic binding powder.
  • the preforms of the present invention essentially consist of the fiber material and the binding agent. This means that the preforms contain no more than 10 wt%, preferably not more than 5 wt% or not more than 1 wt%, of material other than fiber material and binding agent relative to the total weight of the preform. According to another embodiment, the preform consists of fiber material and the binding agent.
  • the fiber material used for the preforms of the present invention essentially consists of glass fibers.
  • the fiber material contains not more than 10 wt%, preferably not more than 5 wt% or not more than 1 wt%, of material other than glass fibers relative to the total weight of the fiber material.
  • the fiber material consists of glass fibers.
  • the binding agent is present in an amount of 1-6 wt% relative to the weight of the fiber material in the preform.
  • the melting point of the binding agent is between 40° and 220 °C, preferably between 40 and 160 °C.
  • the binding agent comprises a polyester, preferably a bisphenolic polyester.
  • each preform essentially consists of the fiber material and the binding agent.
  • the fiber material comprises fiber rovings, preferably glass fiber rovings.
  • the fiber material may comprise carbon fibers or a hybrid material.
  • the fiber material comprises a fiber fabric, such as a fiber mat.
  • a preform may further comprise at least one fiber fabric such as a fiber mat. Fiber rovings may be arranged on top and/or below such fabric.
  • Each preform may contain a plurality of fiber layers which are bound together by the binding agent, e.g., by heating a stack of the plurality of fiber layers and interposed binding agent to form the preform.
  • the preform has an elastic modulus (Young's modulus) of between 0.01 and 250 GPa, preferably 0.01-100 GPa, such as between 0.01-45 GPa or between 0.01-10 GPa. It is most preferred that the preform has an elastic modulus (Young's modulus) of between 0.01 and 10 GPa, preferably between 0.01 and 5 GPa, such as between 0.01 and 4 GPa, between 0.01 and 3 GPa, between 0.01 and 2 GPa, between 0.01 and 1 GPa, or between 0.01 and 0.5 GPa. Preforms with such elasticity and comparatively low stiffness were found to be particularly well suited for a blade manufacturing process according to the present invention.
  • the elastic modulus also known as Young's modulus, defines the relationship between stress (force per unit area) and strain (proportional deformation) in a material.
  • the elastic modulus is a measure of the stiffness of a material.
  • the elastic modulus can be determined by the cantilever beam test, as is well known in the art.
  • the preforms are used as part of the root region of a wind turbine blade, such as the root laminate.
  • the root region may extend up to 40 meters, such as up to 25 meters, from the root end of the blade, as seen in its longitudinal direction. In other embodiments, the root region may extend to the shoulder of the blade +/- 5 meters.
  • the preforms could also be used for other parts and regions of a wind turbine blade.
  • the preforms manufactured according to the afore-mentioned method are used over a length of 10-35% of the total blade length.
  • the preforms are used in a region of the blade extending between its root end and a shoulder of the blade.
  • the plurality of preforms can be successively arranged in the blade mold, wherein the blade mold comprises a blade mold cavity, a root end, a tip end, and opposing first and second lateral edges extending along a longitudinal direction of the blade mold between the root end and the tip end.
  • the first and second lateral edges will be linearly extending edges, usually a left edge and a right edge of the blade mold, as seen in the longitudinal direction.
  • the blade mold cavity advantageously corresponds substantially to the outer aerodynamic surface of a shell half of the blade.
  • the root end and the tip end will usually correspond to the root end and the tip end of the later wind turbine blade.
  • the blade mold cavity will typically have a substantially U-shaped or semi-circular transverse cross section at the root end of the blade mold.
  • the blade mold preferably has a length of at least 30 meters, such as at least 50 meters. In a preferred embodiment, the blade mold has a length of at least 90 meters, such as at least 100 meters.
  • the mold cavity has a longitudinal central axis, which usually extends in the longitudinal direction of the mold through the midpoint of a transverse cross section at any given location along the length of the mold cavity.
  • a longitudinal central axis usually extends in the longitudinal direction of the mold through the midpoint of a transverse cross section at any given location along the length of the mold cavity.
  • the longitudinal central axis will be located at the center or at the lowest point of the U-shape or of the semi-circle.
  • the resin infusion step comprises vacuum assisted resin transfer molding.
  • the resin dissolves the binding agent of the preform.
  • the resin for infusing the blade mold cavity may be an epoxy, a polyester, a vinyl ester or a suitable thermoplastic or duroplastic material.
  • the resin may be a thermosetting resin, such as epoxy, vinyl ester or polyester, or a thermoplastic resin, such as nylon, PVC, ABS, polypropylene or polyethylene.
  • the step of arranging the plurality of preforms in the blade mold cavity comprises placing a first preform into the blade mold cavity, preferably from the root end of the blade mold, such that the first preform extends along the longitudinal direction of the blade mold, and such that the first preform is arranged at the longitudinal central axis of the mold cavity. It is particularly preferred that the first preform acts as an anchoring element for the subsequently placed second and third preforms. In a preferred embodiment, the first preform is fixed to the mold cavity, for example by using one or more fasteners or an adhesive, to form an anchoring element for placement of the second and third preforms. In other embodiments, the first preform acts as anchoring element by way of its own weight keeping the first preform in place.
  • the first preform is placed into the blade mold cavity from the root end of the blade mold, as this offers a particularly easy and effective placement method.
  • the first preform can be placed into the blade mold cavity from lateral edges or from above, for example by using a crane or a scaffold.
  • the mold cavity has a substantially U-shaped or semi-circular transverse cross section at the root end of the blade mold, wherein the first preform is arranged at the center of, or in other words at the lowest point of, said substantially U-shaped or semi-circular transverse cross section.
  • the first preform is preferably placed at a location where it is no longer prone to gravitational movement. This results in a stable configuration which helps using the first preform as anchoring element for accurately placing subsequent preforms.
  • the mold cavity may comprise respective predetermined placement regions of each preform arranged in the mold, such as a first placement region for the first preform, a second placement region for the second preform, and a third placement region for the third preform.
  • the second preform is placed into the blade mold cavity, preferably from the first lateral edge of the blade mold, such that the second preform slides within the mold cavity until the second preform abuts the first preform along a first longitudinally extending interface.
  • this will involve lifting the second preform above the first lateral edge of the blade mold and aligning its longitudinal direction with the longitudinal direction of the blade mold. Then the second preform can be lowered to the mold cavity where it slides within the mold cavity until the second preform abuts the first preform along the first longitudinally extending interface.
  • the sliding motion can take place directly on the surface of the mold or on a gelcoat or other coating material which has been applied to the mold surface.
  • the sliding motion can take place on the top surfaces of the preforms of the first layer.
  • the sliding motion is typically a transverse sliding, i.e., substantially in a direction perpendicular to the longitudinal direction of the blade mold.
  • the first preform acts as an anchoring element or as a stop to prevent further sliding motion when the second/third perform has reached its intended placement region.
  • second preform and third preform are intended to imply a location of these preforms relative to the first preform, after having been arranged in the mold, i.e., the second preform abuts the first preform along a first longitudinally extending interface, and the third preform abuts the first preform along a second longitudinally extending interface.
  • second preform and third preform do not imply a specific order or sequence of layup of the second or third preform, nor do they include the layup of additional preforms before or after placing the second preform or the third preform in the mold cavity.
  • one or more additional preforms may be placed in the mold cavity, preferably from the first lateral edge of the blade mold, preferably such that the one or more additional preforms slide within the mold cavity until the additional preform abuts the second preform, or another additional preform, along an additional longitudinally extending interface.
  • the third preform is placed into the blade mold cavity, preferably from the second lateral edge of the blade mold, such that the third preform slides within the mold cavity until the third preform abuts the first preform along a second longitudinally extending interface.
  • the first longitudinally extending interface will typically be closer to the first lateral edge of the blade mold than the second longitudinally extending interface.
  • the second longitudinally extending interface will typically be closer to the second lateral edge of the blade mold than the first longitudinally extending interface.
  • the placement of the third preform will usually involve lifting the third preform above the second lateral edge of the blade mold and aligning its longitudinal direction with the longitudinal direction of the blade mold.
  • the third preform can be lowered to the mold cavity where it slides within the mold cavity until the third preform abuts the first preform along the second longitudinally extending interface.
  • the sliding motion can take place directly on the surface of the mold or on a gelcoat or other coating material which has been applied to the mold surface.
  • the sliding motion is typically a transverse sliding, i.e., substantially in a direction perpendicular to the longitudinal direction of the blade mold.
  • the first preform acts as an anchoring element or as a stop to prevent further sliding motion when the third perform has reached its intended placement region.
  • the first preform is enclosed from both sides, i.e., by the second and the third preform.
  • the first, second and third preforms have substantially the same length.
  • the first, second and third preforms can also have substantially the same thickness, and optionally substantially the same width.
  • one or more additional preforms are placed in the mold cavity, preferably from the first lateral edge of the blade mold, such that the one or more additional preforms extend along the longitudinal direction of the blade mold, prior to placing the third preform into the blade mold cavity, preferably such that the one or more additional preforms slide within the mold cavity until the additional preform abuts the second preform along a longitudinally extending interface opposing the first longitudinally extending interface.
  • the left side of the mold cavity as seen in the transverse cross section, can be filled with preforms, prior to placing the third preform in the mold cavity on the right side of the mold cavity, as seen in the transverse cross section, or vice versa.
  • placing the second preform into the blade mold cavity is done simultaneously with placing the third preform into the blade mold cavity, optionally simultaneously with placing additional preforms into the blade mold cavity.
  • the second preform is joined to the first preform along said first longitudinally extending interface. Preferably, this is done prior to placing the third preform into the blade mold cavity.
  • the third preform can be joined to the first preform along said second longitudinally extending interface. Preferably, this is done prior to placing additional preforms into the blade mold cavity.
  • this can be done by applying heat to said first/second longitudinally extending interface.
  • the joining can be achieved by using an adhesive or mechanical fasteners.
  • said joining is carried out by passing a heated ironing device along at least part of the top surfaces of the first and second preforms over the first longitudinally extending interface, and along at least part of the top surfaces of the first and third preforms over the second longitudinally extending interface.
  • the heated ironing device is preferably passed over an area of the top surface in the longitudinal direction of the blade mold, said area comprising the first or second longitudinally extending interface.
  • the joining operation makes use of a binding agent or an adhesive, which upon heating, joins the preforms along said interface.
  • a heating blanket or another heating means can be used to join the preforms along the longitudinally extending interface.
  • the step of placing the first preform into the blade mold cavity is carried out using a drawer assembly comprising a support body and at least one drawer slidably supported on the support body, wherein the first preform is transferred from the drawer to the blade mold cavity.
  • the drawer assembly comprises two or more drawers each slidably supported on the support body, preferably at different vertical levels, e.g., a first drawer at a top level of the drawer assembly and a second drawer at a lower level of the drawer assembly.
  • Each drawer preferably has a rectangular cuboid shape and a top surface for receiving a preform, such as the first preform. It is particularly preferred that each drawer forms a tray for receiving a preform.
  • Each drawer is preferably slidably mounted on the support body, for example by corresponding rails that are disposed between the drawer and the support body, or by a sliding track assembly.
  • the two rails can be slidably fitted with each other so that the drawer can be pushed and pulled relative to the support body.
  • the support body is mounted on wheels for facilitating transfer and correct positioning of the drawer assembly and the blade mold.
  • said transfer of the first preform comprises extending the drawer relative to the support body such that the drawer is located above the blade mold cavity and gradually lowering or dropping the first preform from the drawer into the blade mold cavity.
  • the drawer is retracted while gradually lowering or dropping the first preform from the drawer into the blade mold cavity.
  • the drawer comprises a ramp or slope at its distal edge to facilitate the lowering or dropping of the preform over the distal edge of the drawer.
  • the drawer assembly can have height adjustment means to align one or more drawers to the height of the mold or to the placement location.
  • one or more of the preforms can be manufactured on a drawer of the drawer assembly.
  • a top surface of the drawer can act as a preform molding surface, wherein a fiber material and a binding agent are laid on the top surface of the drawer.
  • the fiber material and the binding agent can be covered with a vacuum bag, and negative pressure can be applied to the fiber material and binding agent on the drawer.
  • Heat can be applied to the fiber material and binding agent, for example by using a heating blanket, to form the preform. This can also apply when using one or more fabrics as fiber material.
  • the step of placing the second preform and/or the third preform into the blade mold cavity is carried out by using a ramp arranged on the first lateral edge and/or the second lateral edge of the blade mold.
  • one or more of the drawers from the drawer assembly can be used on the ramps for holding and carrying the preforms that are to be slid from the lateral edges of the mold.
  • the heights of the drawers can be adjusted to the height of the edge.
  • Multiple drawer assemblies may be used from the root end and either lateral edges simultaneously to save time.
  • the drawer assembly comprises widthwise slidable drawers with respect to the support body.
  • the step of arranging the plurality of said preforms in the blade mold cavity further comprises placing one or more additional preforms into the blade mold cavity from the first lateral edge and/or from the second lateral edge of the blade mold, such that the one or more additional preforms slide within the mold cavity until the additional preform abuts a previously placed preform along a further longitudinally extending interface.
  • a fourth preform can be placed into the blade mold cavity, preferably from the first lateral edge of the blade mold, such that the fourth preform slides within the mold cavity until the fourth preform abuts the second preform along a third longitudinally extending interface.
  • a fifth preform can be placed into the blade mold cavity, preferably from the second lateral edge of the blade mold, such that the fifth preform slides within the mold cavity until the fifth preform abuts the third preform along a fourth longitudinally extending interface.
  • a first layer of preforms is formed by said steps of placing the first, second and third preforms, and optionally additional preforms, and wherein the steps of placing the first, second and third preforms, and optionally additional preforms, are repeated once or more times to form one or more additional layers of preforms on top of the first layer of preforms.
  • a stack of preforms can be formed, for example comprising two or more layers, such as five or more layers of preforms.
  • each of the preforms has a length-width ratio of at least 5:1 , preferably at least 10:1.
  • each preform has two opposing lateral edges extending along the longitudinal direction of the preform, and two opposing transverse edges extending substantially perpendicularly to the longitudinal direction of the preform.
  • the above-discussed longitudinally extending interfaces between the preforms in the mold cavity will be formed by abutting longitudinal edges of the preforms. It is preferred that the longitudinally extending interfaces between adjacent preforms in the mold cavity have a length of at least 5 meters, preferably at least 10 meters.
  • each preform is manufactured in a process comprising the steps of providing a preform mold comprising a mold surface, laying a fiber material and a binding agent on the mold surface, covering the fiber material and the binding agent with a vacuum bag, and applying negative pressure to the fiber material and binding agent via the one or more channel members for consolidating the preform, and applying heat to the fiber material and binding agent to form the preform.
  • the mold surface of the preform mold has a length of between 15 and 30 meters.
  • the mold surface of the preform mold has a width of 2-5 meters.
  • the preform mold has a height of between 0.5 and 2 meters.
  • the mold surface of the preform mold may have a molding surface area of between 10 and 100 square meters, such as between 30 and 80 square meters, preferably between 50 and 70 square meters. In a preferred embodiment, the mold surface is substantially gas tight. In some embodiments, the preform mold has a concave, or inwardly curved, mold surface.
  • the fiber laying step in the manufacturing of the preforms will typically comprise the use of one or more fiber lay-up devices. Vacuum or negative pressure is then typically applied to the fiber material and binding agent via one or more channel members for consolidating the preform.
  • the preform manufacturing method further comprises a step of heating the fiber material and the binding agent to form a preform.
  • the fiber material and the binding agent are heated, preferably during or following the consolidation step, using one or more heating devices, such as an oven.
  • a binding agent is added to the fibers prior to the heating step.
  • the binding agent can be applied to the fiber material during layup on the preform mold. In other embodiments, the binding agent is applied to the fiber material prior to the layup of the fiber material.
  • the fiber material is placed successively onto the preform molding surface together with the binding agent.
  • a glass fiber material is placed onto the strip members, such as multiple layers of glass fiber material. The fiber material may advantageously be brought into contact with a binding agent before or during the fiber lay-up.
  • the fiber material may include fiber rovings, such as glass fiber rovings.
  • the lay-up process on the preform mold may include placing multiple single roving bundles into the mold, the roving bundles being preferably aligned unidirectionally. In a preferred embodiment, multiple layers of fiber rovings or roving bundles are successively placed onto each preform mold.
  • a heating step is carried out during or after applying negative pressure to the fiber material, such as one or more fabrics, and binding agent, wherein heating of the fiber material, such as one or more fabrics, and the binding agent takes place at a temperature of between 40 and 200 °C, preferably between 70 and 160 °C, most preferably between 70 and 80 °C.
  • the method of manufacturing a wind turbine blade part of the present invention may further comprise using a computing unit to assist in the determination and monitoring of the correct layup sequence and layup locations of the preforms in the blade mold.
  • Said computing unit may comprise a hardware computing unit or a cloud-based computing unit.
  • at least one algorithm may be used by the computing unit to determine and/or monitor the layup sequence and the correct layup locations of the preforms in the blade mold.
  • the present invention relates to a blade mold assembly for carrying out a method according to the present invention, the mold assembly comprising a blade mold comprising a blade mold cavity, a root end, a tip end, and opposing first and second lateral edges extending along a longitudinal direction of the blade mold between the root end and the tip end, and a drawer assembly, preferably installed at the root end of the blade mold, the drawer assembly comprising a support body and at least one drawer slidably supported on the support body.
  • the drawer assembly can be releasably fixed to the blade mold.
  • the drawer assembly comprises two or more drawers each slidably supported on the support body, preferably at different vertical levels, e.g., a first drawer at a top level of the drawer assembly and a second drawer at a lower level of the drawer assembly.
  • Each drawer preferably has a rectangular cuboid shape and a top surface for receiving a preform, such as the first preform. It is particularly preferred that each drawer forms a tray for receiving a preform.
  • Each drawer is preferably slidably mounted on the support body, for example by corresponding rails that are disposed between the drawer and the support body, or by a sliding track assembly. The two rails can be slidably fitted with each other so that the drawer can be pushed and pulled relative to the support body.
  • the support body is mounted on wheels for facilitating transfer and correct positioning of the drawer assembly and the blade mold.
  • the drawer assembly may also comprise height adjustment means to align one or more drawers to the height of the mold or to the placement location, wherein said height adjustment means include height-adjustable rails or sliding track assemblies.
  • the blade mold assembly further comprises a heated ironing device which is movable along the blade mold cavity.
  • the blade mold assembly comprises a first ramp arranged on the first lateral edge and/or a second ramp arranged on the second lateral edge of the blade mold.
  • the ramp may extend over at least 30%, such as at least 50%, of the length of the respective lateral edge of the blade mold.
  • the ramp may have a slope which is substantially the same or smaller than the slope of the molding cavity adjacent to the respective lateral edge of the blade mold.
  • the present invention relates to a method of manufacturing a wind turbine blade part, the method comprising the steps of providing a plurality of preforms, preferably including a first, second and third preform, each preform comprising a fiber material and a binding agent, arranging the plurality of preforms in a mold comprising a mold cavity and opposing first and second lateral edges extending along a longitudinal direction of the mold, infusing resin to the mold cavity, and curing and/or hardening the resin in order to form the blade part, wherein arranging the plurality of preforms in the mold cavity comprises placing the first preform into the mold cavity such that the first preform extends along the longitudinal direction of the mold, and such that the first preform is arranged at a longitudinal central axis of the mold cavity, placing the second preform into the mold cavity, preferably from the first
  • the present invention relates to a drawer assembly for placing a preform into a mold cavity in a method according to the present invention, the drawer assembly comprising a support body and at least one drawer slidably supported on the support body.
  • the drawer assembly comprises two or more drawers, such as three or more drawers, each slidably supported on the support body at different vertical levels, including a first drawer at a top level of the drawer assembly and a second drawer at a lower level of the drawer assembly.
  • each drawer has a rectangular cuboid shape and a top surface for receiving a preform, thus forming a tray for receiving a preform.
  • each drawer is slidably mounted on the support body by corresponding rails that are disposed between the drawer and the support body or by a sliding track assembly.
  • the support body is mounted on wheels.
  • the drawer assembly further comprises height adjustment means including height-adjustable rails or height-adjustable sliding track assemblies.
  • wt% means weight percent.
  • relative to the weight of the fiber material means a percentage that is calculated by dividing the weight of an agent, such as a binding agent, by the weight of the fiber material. As an example, a value of 1 wt% relative to the weight of the fiber material corresponds to 10 g of binding agent per kilogram of fiber material.
  • the term “longitudinal” means an axis or direction running substantially parallel to the maximum linear dimension of the element in question, for example a blade mold.
  • Fig. 1 shows a wind turbine
  • Fig. 2 shows a schematic view of a wind turbine blade
  • Fig. 3 shows a schematic view of an airfoil profile through section l-l of Fig. 4,
  • Fig. 4 shows a schematic view of the wind turbine blade, seen from above and from the side
  • Fig. 5a) and 5b) show a perspective drawing of a preform mold
  • Figs. 6-10 are schematic drawings of a blade mold, illustrating various stages of the method of the present invention.
  • FIGS. 11-13 are schematic drawings of a mold assembly according to the present invention
  • FIGs. 14-17 are perspective drawings illustrating various steps of a method according to the present invention
  • FIGS. 18 and 19 are perspective drawings illustrating various steps of a method according to another embodiment of the present invention.
  • Fig. 20 is a perspective schematic drawing illustrating the layup of multiple preforms according to the present invention.
  • Fig. 21 is a schematic representation of a blade mold assembly according to the present invention.
  • Fig. 22 is a schematic representation of a drawer assembly according to the present invention.
  • Fig. 1 illustrates a conventional modern upwind wind turbine according to the so-called "Danish concept" with a tower 4, a nacelle 6 and a rotor with a substantially horizontal rotor shaft.
  • the rotor includes a hub 8 and three blades 10 extending radially from the hub 8, each having a blade root 16 nearest the hub and a blade tip 14 furthest from the hub 8.
  • Fig. 2 shows a schematic view of an embodiment of a wind turbine blade 10 according to the invention.
  • the wind turbine blade 10 has the shape of a conventional wind turbine blade and comprises a root region 30 closest to the hub, a profiled or an airfoil region 34 furthest away from the hub and a transition region 32 between the root region 30 and the airfoil region 34.
  • the blade 10 comprises a leading edge 18 facing the direction of rotation of the blade 10, when the blade is mounted on the hub, and a trailing edge 20 facing the opposite direction of the leading edge 18.
  • the airfoil region 34 (also called the profiled region) has an ideal or almost ideal blade shape with respect to generating lift, whereas the root region 30 due to structural considerations has a substantially circular or elliptical cross-section, which for instance makes it easier and safer to mount the blade 10 to the hub.
  • the diameter (or the chord) of the root region 30 may be constant along the entire root area 30.
  • the transition region 32 has a transitional profile gradually changing from the circular or elliptical shape of the root region 30 to the airfoil profile of the airfoil region 34.
  • the chord length of the transition region 32 typically increases with increasing distance rfrom the hub.
  • the airfoil region 34 has an airfoil profile with a chord extending between the leading edge 18 and the trailing edge 20 of the blade 10. The width of the chord decreases with increasing distance rfrom the hub.
  • a shoulder 40 of the blade 10 is defined as the position, where the blade 10 has its largest chord length.
  • the shoulder 40 is typically provided at the boundary between the transition region 32 and the airfoil region 34.
  • chords of different sections of the blade normally do not lie in a common plane, since the blade may be twisted and/or curved (i.e. pre-bent), thus providing the chord plane with a correspondingly twisted and/or curved course, this being most often the case in order to compensate for the local velocity of the blade being dependent on the radius from the hub.
  • Figs. 3 and 4 depict parameters which are used to explain the geometry of the wind turbine blade according to the invention.
  • Fig. 3 shows a schematic view of an airfoil profile 50 of a typical blade of a wind turbine depicted with the various parameters, which are typically used to define the geometrical shape of an airfoil.
  • the airfoil profile 50 has a pressure side 52 and a suction side 54, which during use - i.e. during rotation of the rotor - normally face towards the windward (or upwind) side and the leeward (or downwind) side, respectively.
  • the airfoil 50 has a chord 60 with a chord length c extending between a leading edge 56 and a trailing edge 58 of the blade.
  • the airfoil 50 has a thickness t, which is defined as the distance between the pressure side 52 and the suction side 54.
  • the thickness t of the airfoil varies along the chord 60.
  • the deviation from a symmetrical profile is given by a camber line 62, which is a median line through the airfoil profile 50.
  • the median line can be found by drawing inscribed circles from the leading edge 56 to the trailing edge 58. The median line follows the centers of these inscribed circles and the deviation or distance from the chord 60 is called the camber f.
  • the asymmetry can also be defined by use of parameters called the upper camber (or suction side camber) and lower camber (or pressure side camber), which are defined as the distances from the chord 60 and the suction side 54 and pressure side 52, respectively.
  • Airfoil profiles are often characterized by the following parameters: the chord length c, the maximum camber f, the position df of the maximum camber f, the maximum airfoil thickness t, which is the largest diameter of the inscribed circles along the median camber line 62, the position dt of the maximum thickness t, and a nose radius (not shown). These parameters are typically defined as ratios to the chord length c.
  • a local relative blade thickness t/c is given as the ratio between the local maximum thickness t and the local chord length c.
  • the position d p of the maximum pressure side camber may be used as a design parameter, and of course also the position of the maximum suction side camber.
  • Fig. 4 shows other geometric parameters of the blade.
  • the blade has a total blade length L.
  • the diameter of the root is defined as D.
  • the curvature of the trailing edge of the blade in the transition region may be defined by two parameters, viz.
  • a minimum outer curvature radius r 0 and a minimum inner curvature radius n which are defined as the minimum curvature radius of the trailing edge, seen from the outside (or behind the trailing edge), and the minimum curvature radius, seen from the inside (or in front of the trailing edge), respectively.
  • the blade is provided with a prebend, which is defined as Ay, which corresponds to the out of plane deflection from a pitch axis 22 of the blade.
  • Fig. 5 illustrates a method of manufacturing a preform for a wind turbine blade using a preform mold 90 comprising a mold surface 87.
  • vacuum channels 72 can be fastened to the mold surface 87.
  • a fiber material 85 such as one or more fabrics, and a binding agent is laid on the mold surface 87.
  • the fiber material 85, the binding agent and the vacuum channels 72 are covered with a vacuum bag 91 ; see Fig. 5b).
  • Negative pressure can then be applied to the fiber material and binding agent via the channel members 72, using a vacuum source 92 and connected tubes 93. Thereby, the fiber layup is consolidated.
  • Figs. 6-10 are schematic drawings of a blade mold, illustrating various stages of the method of manufacturing a wind turbine blade part, such as a pressure side shell half or a suction side shell half, of the present invention.
  • Fig. 6 is a schematic illustration of a blade mold 96 for forming a shell half of a wind turbine blade.
  • the blade mold 96 comprises a blade mold cavity 97 which corresponds substantially to the outer aerodynamic surface of the shell half.
  • the mold cavity 97 has a substantially U-shaped or semi-circular transverse cross section at the root end 65 of the blade mold 96.
  • the blade mold 96 also comprises a root end 65, a tip end 66, and opposing first and second lateral edges 67, 68 extending along a longitudinal direction Lm of the blade mold 96 between the root end 65 and the tip end 66.
  • Fig. 6 also illustrates a first, second and third placement regions 81 , 82, 83, see hatched lines.
  • a first preform 98a is to be placed in the first placement region 81 , as illustrated in Figs. 7 and 8.
  • the preform 98a comprises a fiber material and a binding agent.
  • Arranging the plurality of preforms 98a-c in the blade mold cavity 97 comprises placing the first preform 98a into the blade mold cavity 97, preferably from the root end 65 of the blade mold 96, such that the first preform 98a extends along the longitudinal direction Lm of the blade mold 96, see Figs. 6-8.
  • the first preform 98a is arranged at the longitudinal central axis 69 of the mold cavity 97, for example such that a center line of the preform is aligned with the central axis 69 of the mold cavity, see Fig. 8.
  • the first preform 98a is arranged at the lowest point of said substantially U-shaped or semicircular transverse cross section of the mold cavity 97.
  • a second preform 98b is placed into the blade mold cavity 97 from the first lateral edge 67 of the blade mold 96 such that the second preform 98b slides within the mold cavity 97 until the second preform 98b abuts the first preform 98a along a first longitudinally extending interface 70, see Figs. 9 and 10.
  • the first preform 98a advantageously acts as an anchoring element for placement of the second and subsequent preforms.
  • the second preform 98b is joined to the first preform 98a along said first longitudinally extending interface 70 prior to placing the third preform 98c into the blade mold cavity 97.
  • a third preform 98c is placed into the blade mold cavity 97 from the second lateral edge 68 of the blade mold 96 such that the third preform 98c slides within the mold cavity 97 until the third preform 98c abuts the first preform 98a along a second longitudinally extending interface 71.
  • the third preform 98c is joined to the first preform 98a along said second longitudinally extending interface 71 prior to placing additional preforms into the blade mold cavity 97.
  • steps are preferably repeated, and/or additional material such as reinforcing sections and core material is also placed into the mold along with the preforms.
  • additional material such as reinforcing sections and core material is also placed into the mold along with the preforms.
  • FIGs. 11-13 are schematic drawings of a mold assembly 100 according to the present invention, illustrating another embodiment of a method of manufacturing a wind turbine blade part according to the present invention.
  • the blade mold assembly 100 comprises the blade mold 96 with the blade mold cavity 97, and a drawer assembly 77, preferably installed at the root end of the blade mold 96.
  • the drawer assembly 77 comprises a support body 78 and at least one drawer 79 slidably supported on the support body 78.
  • the step of placing the first preform 98a into the blade mold cavity 97 is carried out using a drawer assembly 77 comprising a support body 78 and at least one drawer 79 slidably supported on the support body 78.
  • the first preform 98a can be transferred from the drawer 79 to the blade mold 96 cavity by extending the drawer 79 relative to the support body 78 such that the drawer is located above the blade mold cavity 97. Then, the preform 98a can be gradually dropped or lowered from the drawer 79 into the blade mold cavity 97, see Fig. 13.
  • the drawer assembly 77 may also comprise height adjustment means to align one or more drawers 79 to the height of the mold or to the placement location.
  • Figs. 14-17 are perspective drawings illustrating an example of a method of joining preforms along their longitudinally extending interface.
  • a first preform 98a is placed centrally into the blade mold cavity 97, followed by placement of a second preform 98b, see Fig. 15.
  • the joining process is carried out by passing a heated ironing device 75 along at least part of the top surfaces 99a, 99b of the first and second preforms 98a, 98b over the first longitudinally extending interface 70, as illustrated in Fig. 16.
  • an additional preform 98d is placed in the mold cavity, and again the heated ironing device is passed along at least part of the top surfaces 99a, 99d of the second preform 98b and the additional preform 98d over the longitudinally extending interface between said preforms.
  • the same process can be carried out at the opposing side 68 of the blade mold, which is not illustrated here for the sake of simplicity.
  • Figs. 18 and 19 illustrate another embodiment of a method according to the present invention.
  • the step of placing the second preform 98b and/or the third preform 98c into the blade mold cavity 97 is carried out by using a ramp 80 arranged on the first lateral edge 67 and/or the second lateral edge 68 of the blade mold 96.
  • the preform 98b can be slid over the ramp to facilitate a smooth lowering and ergonomically beneficial placement method.
  • Fig. 20 is a perspective schematic drawing illustrating the layup of multiple preforms according to the present invention.
  • several additional preforms 98d- j have been placed into the blade mold cavity 97 from the first lateral edge 67 and/or from the second lateral edge 68 of the blade mold 96, such that the one or more additional preforms slide within the mold cavity 97 until the additional preform abuts a previously placed preform along a further longitudinally extending interface 72, 73.
  • a first layer of preforms 98a-e is formed by said steps, followed by a second layer of preforms 98f-j , placed by repeating the above-discussed steps.
  • a third and a fourth layer of preforms are illustrated in Fig. 20.
  • Fig. 21 is a schematic representation of a blade mold assembly according to another embodiment of the present invention.
  • the step of placing the preforms into the blade mold cavity 97 is carried out by using a first drawer assembly 77a at the root end of the blade mold 96, and a second drawer assembly 77b at a lateral edge 68 of the blade mold 96.
  • Each of the two drawer assemblies 77a, 77b comprises a support body 78 and three drawers 79, each slidably supported on the support body 78.
  • the three drawers 79 are arranged at different vertical levels, i.e.
  • each preform 98 can be transferred from its drawer to the blade mold cavity.
  • Fig. 22 is a schematic representation of a drawer assembly according to another embodiment.
  • the drawer assembly 77 comprises a support body 78 and three drawers 79, each slidably supported on the support body 78.
  • the three drawers 79 are arranged at different vertical levels, i.e., a first drawer at a top level of the drawer assembly 77, a second drawer at a middle level of the drawer assembly 77, and a third drawer at a bottom level of the drawer assembly 77.
  • the preforms 98 are manufactured on the respective drawers 79 of the drawer assembly 77, as illustrated in the middle and bottom level of the drawer assembly of Fig. 22.
  • a top surface 76 of the drawer 79 is used as a preform molding surface, wherein a fiber material and a binding agent are laid on the top surface of the drawer, which is then covered with a vacuum bag and a heating blanket 94 to form the preform by applying negative pressure and by heating the fiber material and binding agent.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Robotics (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Moulding By Coating Moulds (AREA)

Abstract

La présente invention concerne un procédé et un ensemble moule pour la fabrication d'une partie pale d'éolienne (52, 54). Une pluralité de préformes (98a-c) comprenant un matériau fibreux et un agent de liaison est disposée dans un moule de pale (96), suivie d'une infusion de résine et d'une polymérisation ou d'un durcissement de la résine afin de former la partie pale. L'agencement de la pluralité de préformes (98a-c) dans la cavité de moule (97) de pale comprend le placement d'une première préforme (98a) dans la cavité de moule (97) de pale, de préférence à partir de l'extrémité racine (65) du moule de pale (96), de telle sorte que la première préforme (98a) s'étend le long de la direction longitudinale du moule de pale (96) et de telle sorte que la première préforme (98a) est disposée au niveau de l'axe central longitudinal (69) de la cavité de moule (97). Ensuite, une deuxième préforme (98b) est placée dans la cavité de moule (97) de pale à partir du premier bord latéral (67) du moule de pale (96) de telle sorte que la deuxième préforme (98b) coulisse à l'intérieur de la cavité de moule (97) jusqu'à ce que la deuxième préforme (98b) vienne en butée contre la première préforme (98a) le long d'une première interface s'étendant longitudinalement (70). Une troisième préforme (98c) est placée dans la cavité de moule (97) de pale à partir du second bord latéral (68) du moule de pale (96) de telle sorte que la troisième préforme (98c) coulisse à l'intérieur de la cavité de moule (97) jusqu'à ce que la troisième préforme (98c) vienne en butée contre la première préforme (98a) le long d'une seconde interface s'étendant longitudinalement (71).
PCT/EP2024/071523 2023-08-03 2024-07-30 Procédé de moulage d'une pale d'éolienne à l'aide de préformes Pending WO2025027009A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP23306334.6 2023-08-03
EP23306334 2023-08-03

Publications (1)

Publication Number Publication Date
WO2025027009A1 true WO2025027009A1 (fr) 2025-02-06

Family

ID=87575908

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2024/071523 Pending WO2025027009A1 (fr) 2023-08-03 2024-07-30 Procédé de moulage d'une pale d'éolienne à l'aide de préformes

Country Status (1)

Country Link
WO (1) WO2025027009A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150059128A1 (en) * 2013-09-02 2015-03-05 Karl Mayer Malimo Textilmaschinenfabrik Gmbh Method and apparatus for producing a scrim
US20150314536A1 (en) * 2012-12-21 2015-11-05 Vestas Wind Systems A/S Method of manufacturing a wind turbine blade using pre-fabricated stacks of reinforcing material
US20200384707A1 (en) * 2017-12-14 2020-12-10 Lm Wind Power International Technology Ii Aps System and method for manufacturing preforms for a wind turbine rotor blade
US20220339890A1 (en) * 2019-09-16 2022-10-27 Blade Dynamics Limited A container comprising fibre material for a fibre-reinforced composite component

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150314536A1 (en) * 2012-12-21 2015-11-05 Vestas Wind Systems A/S Method of manufacturing a wind turbine blade using pre-fabricated stacks of reinforcing material
US20150059128A1 (en) * 2013-09-02 2015-03-05 Karl Mayer Malimo Textilmaschinenfabrik Gmbh Method and apparatus for producing a scrim
US20200384707A1 (en) * 2017-12-14 2020-12-10 Lm Wind Power International Technology Ii Aps System and method for manufacturing preforms for a wind turbine rotor blade
US20220339890A1 (en) * 2019-09-16 2022-10-27 Blade Dynamics Limited A container comprising fibre material for a fibre-reinforced composite component

Similar Documents

Publication Publication Date Title
US11607826B2 (en) Method of manufacturing at least two preforms for moulding a wind turbine blade
US20200384707A1 (en) System and method for manufacturing preforms for a wind turbine rotor blade
EP3743268B1 (fr) Système et moule de fabrication de préformes pour une pale de rotor de turbine éolienne
US11577478B2 (en) Method of molding a shell part of a wind turbine blade
CN108700028B (zh) 风力涡轮机叶片及相关制造方法
EP4212324B1 (fr) Fabrication d'un capuchon de longeron de pale d'éolienne
WO2021239954A1 (fr) Procédé d'agencement d'une pluralité de préformes dans un moule de pale d'éolienne
CN115666913A (zh) 用于诸如翼梁帽的增强结构的拉挤纤维增强条带
EP3930990B1 (fr) Moule flexible de fabrication de préformes pour fabriquer une préforme de pale d'éolienne
CN112840120A (zh) 具有多个梁帽的风力涡轮机叶片
WO2018100177A1 (fr) Système et procédé de fabrication d'une pale d'éolienne
WO2025027009A1 (fr) Procédé de moulage d'une pale d'éolienne à l'aide de préformes
US12466144B2 (en) Precured fibrous strip for a load-carrying structure for a wind turbine blade
EP4234192B1 (fr) Procédé de fabrication de préformes de pales d'éoliennes à géométries complexes
US20250135685A1 (en) Patterned fibre fabrics for a wind turbine blade preform
US20250050596A1 (en) Method for manufacturing a preform for a wind turbine blade
US20250114985A1 (en) Manufacturing of an embedding element for a wind turbine blade
EP4430297A1 (fr) Semelle de longeron pour pale d'éolienne

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 24746368

Country of ref document: EP

Kind code of ref document: A1