WO2014095870A1 - Dispositif de moulage variable permettant de fabriquer un élément de liaison en t pour une pale de rotor d'une éolienne et procédé de fabrication dudit dispositif - Google Patents

Dispositif de moulage variable permettant de fabriquer un élément de liaison en t pour une pale de rotor d'une éolienne et procédé de fabrication dudit dispositif Download PDF

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Publication number
WO2014095870A1
WO2014095870A1 PCT/EP2013/076910 EP2013076910W WO2014095870A1 WO 2014095870 A1 WO2014095870 A1 WO 2014095870A1 EP 2013076910 W EP2013076910 W EP 2013076910W WO 2014095870 A1 WO2014095870 A1 WO 2014095870A1
Authority
WO
WIPO (PCT)
Prior art keywords
main
insert
web
surface portion
recess
Prior art date
Application number
PCT/EP2013/076910
Other languages
German (de)
English (en)
Inventor
Frank WISCHOLEWSKI
Karsten PAHL
Marcus DREWES
Helge SAEGER
Original Assignee
Carbon Rotec Gmbh & Co. Kg
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 Carbon Rotec Gmbh & Co. Kg filed Critical Carbon Rotec Gmbh & Co. Kg
Publication of WO2014095870A1 publication Critical patent/WO2014095870A1/fr

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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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/30—Mounting, exchanging or centering
    • B29C33/306—Exchangeable mould parts, e.g. cassette moulds, mould inserts
    • 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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/44—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles
    • 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
    • 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
    • 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
    • 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

  • Variable shaping device for producing a T-bar for a rotor blade of a wind turbine and a method for the production thereof
  • the present invention relates to a molding apparatus for producing a T-bar for a rotor blade of a wind turbine and a method for the production thereof.
  • Rotor blades for wind turbines typically consist of two rotor blade half shells, which are connected to each other and form the outer skin of the rotor blade.
  • On the two inner sides of the rotor blade half shells in each case a belt extending in the longitudinal direction of the rotor blade and connected to the respective rotor blade half shell is arranged, which absorbs forces acting on the rotor blade during its operation.
  • the two straps are connected via one or two webs arranged therebetween, which also extend in the longitudinal direction of the rotor blade and give the rotor blade additional strength.
  • such a web has a web carrier section which is arranged between the two belts and extends in the vertical direction of the rotor blade, at the two ends of which a web foot section is provided, with which the web rests on the belts.
  • T-webs are increasingly used, in particular in designed for heavy loads wind turbines, so webs , Which have at least one in cross-section T-shaped end portion, ie webs, in which at least one of the two foot portions has two projecting from the web support portion in opposite directions leg.
  • Webs for rotor blades of wind turbines are made similar to the half-shells of the rotor blades using molding devices in which the raw material for the webs, such as a fiber composite material, such as glass fiber reinforced plastic or carbon fiber reinforced plastic, is introduced and then the web is formed, namely in particular using a vacuum infusion process, before subsequently demolding the finished web from the mold.
  • a flat main shape can be used, are placed on the two web foot angle, which limit the shape of the web to be produced and allow the production of the legs of the foot sections by stacking additional material in the web foot angle. By changing the distance of the web foot angle while the height of the web to be produced can be adjusted.
  • T-bars In contrast, the production of T-bars requires the use of specially adapted shaping devices in order to be able to form the legs of the T-foot sections provided on both sides of the bridge carrier section.
  • the known molding devices for the production of T-webs are used in each case only for a T-web with a predetermined surface shape and with predetermined dimensions. If a T-bar with a different surface shape and / or other dimensions is to be produced, either another mold device must be manufactured and used. Thus, it is not possible with the known mold devices, with the same molding device flexible T-webs with produce different geometries.
  • a T-bar molding apparatus for a rotor blade of a wind turbine which has a web support portion and at least one provided at one end of the web support portion
  • T-shaped designed web foot section to provide, with the easy and fast T-bars with different geometries, ie different surface shape and / or dimensions, can be produced and with the particular damage-free and high quality having T-bars can be reliably manufactured that have an undercut geometry.
  • this object is achieved by a molding apparatus having the features of claim 1.
  • the molding apparatus comprises a main mold and at least one insert, wherein the main mold has at least one recess and a main portion surrounding at least one recess with a surface portion surrounding the recess and a forming surface portion adjacent the recess surrounding the recess.
  • the at least one insert is at least partially configured complementary to the at least one recess of the main form and the at least one insert and the main shape are configured so that when the at least one insert is inserted into the at least one recess of the main form, a first surface portion of the insert is at least substantially flush with an edge of the main section delimiting the shaping surface section of the main section, and the first surface section of the insert is bounded on its opposite side from the shaping surface section of the main section by a second surface section which extends into the at least one recess.
  • the depression of the main mold provides a volume for the production of one of the legs of the T-shaped web foot section which projects from the web support section of the web to be produced, wherein the web support section is preferably delimited by the shaping surface section of the main section located outside the recess.
  • the other leg can be shaped in a manner known per se by stacking or laying additional raw material upwardly on the material forming the web support section after the at least partial filling of a region of the depression with the raw material.
  • the insert inserted into the recess partially fills the recess and defines or defines the part of the recess in which one of the two foot sections of the T-web is formed.
  • the first shaping surface portion of the insert inserted into the recess continues the shaping surface portion of the main portion, so that the main portion and the insert together form a shaping surface portion whose length, which corresponds to the height of the web to be produced, of the width of the insert depends, so that the height of the web to be produced can be adjusted in a simple manner by inserting an insert with the appropriate dimensions.
  • the second shaping surface portion of the insert extends into the recess and thus limits the remaining portion of the recess, in which preferably one leg of the T-foot portion is formed.
  • the molding apparatus allows adjustment of a desired geometry of a T-bar to be manufactured simply by inserting a corresponding insert into the recess of the main mold.
  • the production of an additional molding device nor a permanent change of an existing molding device is necessary in order to provide T-webs with different geometries and in particular different web heights for different applications.
  • the main mold and the insert inserted into the main mold of the molding apparatus according to the invention can form a shape together for a T-bar with an undercut geometry, wherein the produced web despite the undercut without mechanical deformation or damage of the Bar material can be removed from the mold, whereby the simple and fast production of an undercut T-bar with the desired quality and quality is made possible.
  • the main form and the insert may be formed so that the main form does not form an undeformable undercut with the insert or the manufactured web, while the main form and the inserted insert together form an undercut in the demoulding geometry, which is the preparation of a Entformungsnchtung underlaid inserter allows. Damage to the T-bar during the removal is thereby prevented by removing the insert and the T-bar produced together from the main form which does not form an undercut, and then removing the insert from the T-bar.
  • the first surface portion of the insert inserted into the main mold, together with the forming surface portion of the Hauptab- section of the main shape forms a shaping surface for the web support portion.
  • the shaping surface may correspond to a flat side of the preferably substantially flat or plate-shaped web support section. In this way, the dimension of the web carrier section and in particular its height can be adjusted specifically by the corresponding design of the first surface portion of the insert.
  • the first surface portion of the insert inserted into the main mold, together with the forming surface portion of the main portion of the main mold, forms an at least substantially planar surface.
  • a surface is suitable for producing a flat or plate-shaped web carrier section with a substantially flat flat side.
  • the second surface section of the insert preferably forms a shaping surface for a section of a leg of one of the at least one web foot section.
  • the second surface section may be an upper side te of the respective leg of the web foot portion of the web to be produced limit, which is directly adjacent to the associated flat side of the web support portion of the T-bar, from which the leg protrudes.
  • the angle between the first and the second surface section of the insert preferably determines the angle at which the leg of the T-foot section protrudes from the web support section.
  • the molding device has a plurality of insertable into the main form depositors with different dimensions for the production of webs with different shapes.
  • the forming apparatus can then be used to make T-bars with a corresponding number of different geometries.
  • the width of the first surface section of an insert deviates from the width of the first surface section of another insert.
  • the width of the insert is preferably the extent of the inserted insert from the second surface portion of the insert to the forming surface portion of the main portion.
  • the different widths thus preferably correspond to different broadenings of the shaping surface section of the main section through the insert and thus different heights of the web support section.
  • a preferred embodiment of the present invention in view of the applicability of the webs in rotor blades designed for high loads, provides that the main mold comprises two depressions respectively bounded by the main portion of the main mold and arranged on opposite sides of the main portion are.
  • a substantially T-shaped web foot section can be produced at both ends of the web to be produced, so that the web produced can be connected to the respective belt of the rotor blade particularly stably and firmly on both sides.
  • the T-foot sections can be targeted in those lengths sections of the web are provided, in which this is necessary due to the specific wind load of the rotor blade in its use.
  • Such a load-optimized arrangement of the T-foot sections is possible without any problems even if the rotor blade profile present at the respective length sections is designed in such a way that it requires an undercut geometry of at least one T-foot section or a leg of the same, since at least a depositor will avoid damage in the area of the foot sections during demoulding, even if at least one of the foot sections forms an undercut effective in demoulding.
  • undercut geometries of the web to be produced can be used to carry out a screed-free demolding of the web together with the at least one inserter, by the removal means, ie the direction in which the carrier produced, optionally together with the one or more inlays to demould from the main form, depending on the respective geometry of the web and the insert is chosen appropriately.
  • the Entformungsnchtung example at least over part of the length of the molding device at least approximately perpendicular to the forming surface of the main section or inclined thereto.
  • the molding device has at least two inserts, which are at least partially complementary to each one of the two wells of the main shape, wherein the depositors and the main shape are designed so that when each of the depositors in each one Recess of the main mold is inserted, in each case a first surface portion of the depositors to a shaping surface In each case, the first surface portion of the insert is delimited at its opposite side of the shaping surface portion of the main portion of a second surface portion which extends into the at least one recess in at least.
  • the shape geometry predetermined by the shaping device can be adapted to the respective requirements by inserting a corresponding insert.
  • this case can be formed at both ends of the molding apparatus or the web to be produced by the respective depositor effective in Entformungscardi the molding device undercut for the web to be produced.
  • a damage-free demolding is readily possible by the at least two inserts are removed together with the shaped web of the main shape and then removed from the web.
  • the flexibility in terms of the geometry of the web to be produced and the possible Entformungscardien, in each of which a non-undercut removal of the web is possible together with the at least two depositors is thus further increased by the provision of at least two depositors.
  • the first surface portion and the second surface portion of the at least one inserter an inner angle of less than 90 degrees, preferably less than 75 degrees, and more preferably less to include as 60 degrees.
  • the first surface portion of the insert forms a forming surface portion for the web support portion and the adjoining second surface portion of the insert forms a shaping surface portion for a leg of the web foot portion
  • the angle between the two surface portions corresponds to the angle between the web support portion and the respective leg of the web foot portion .
  • the demolding direction of the molding device is oriented perpendicular to a main plane or flat side of the web support section or the corresponding shaping surface of the main section, the acute angle described above simultaneously leads to an undercut effective in the removal direction.
  • the demoulding direction can, however, in principle also be inclined to the vertical of the shaping surface of the main section.
  • An embodiment of the present invention which is particularly advantageous with respect to the demouldability of the web provides that the shaping section of the main section which adjoins the recess and the surface section adjoining the recess faces outside the recess has an internal angle greater than 90 degrees , preferably at least 100 degrees, and more preferably at least 105 degrees.
  • the surface section which turns over the recess does not form an effective undercut in the direction perpendicular to the shaping surface section, which direction can represent the demoulding direction, so that demoulding is not hindered.
  • the insert placed in the recess may have at least one third non-forming surface section, to which the insert Fung umwandenden surface portion of the main section has and in particular rests flat against this.
  • the main shape has two recesses arranged on opposite sides of the main portion of the main form, each of the recesses being bounded on its main portion side by a recess-walled surface portion of the main portion of the main form the sum of the inner angle between the forming surface portion of the main portion and the recess portion of the main portion and the inner angle between the shaping surface portion of the main portion and the portion of the main portion turning over the other portion is more than 180 degrees, preferably more than 181 degrees, more preferably more than 182 degrees, most preferably more than 183 degrees and most preferably more than 184 degrees.
  • At least one or both recesses may be provided with at least one insert which comprises at least one non-forming surface which faces or bears against the surface section of the main section which surrounds the respective recess.
  • the shaping surface portion of an additional insert placed in the other recess is less than 180 degrees, preferably less than 170 degrees, more preferably less than 150 degrees, and most preferably less than 120 degrees.
  • a web can be created with an undercut geometry in the region of its foot sections, which would not allow damage-free removal of the web from a one-piece mold, but which in the context of the invention by simultaneous removal of the web and at least one insert from the main mold Undercut and thus can be removed without damage.
  • the at least one insert can be inserted into the main form in such a way that it is positively connected to the main form at least in a direction different from the demoulding direction of the molding device.
  • the insert in the main form is effectively fixed in its desired position, so that the depositor and the main form together reliably and reproducibly specify a desired geometry for the web.
  • the main shape in the region of the bottom of the at least one recess having a groove into which a portion of the insert, preferably substantially accurately fit, is used to the positive connection to guarantee.
  • the bottom surface of the recess can also be embodied without a groove and at least substantially flat, and the insert can rest without a recess engaging in the groove engaging portion at least substantially flat on the bottom surface of the groove.
  • the molding device comprises a plurality of inserts, which can be inserted side by side and / or one behind the other in the at least one recess of the main form.
  • the use of several in the same recess one behind the other and / or juxtaposed deposit has the advantage that the individual depositors can be made smaller, whereby their handling compared to a large contiguous deposit is facilitated.
  • Each depositor can thereby form a segment of a corresponding composite insert set of inserts.
  • a lengthwise trained insertion set may be provided in the longitudinal direction of the main shape, which preferably corresponds to the longitudinal direction of the web to be produced, which is formed from a plurality of elongated inserts which can be inserted one behind the other into the respective recess.
  • the molding device preferably comprises at least one web foot angle, which can be placed on the bottom surface of the at least one recess of the main mold, wherein the at least one web foot angle preferably has at least one opposite the second surface portion of the at least one insert and pointing to this surface portion.
  • the second surface portion of the insert and the opposite surface portion of the web foot angle can be substantially parallel thereto. be oriented to each other. Accordingly, the applied surface portion of the ridge foot angle is preferably inclined away from the main portion and may be at an angle of more than 90 degrees, preferably more than 15 degrees, and more preferably more than 130 degrees with respect to the plane of the forming surface of the main portion. be oriented.
  • a gap is preferably formed, which corresponds in shape to a leg of the foot portion of the web to be produced and whose gap defines the thickness of the leg of the web foot to be produced.
  • the surface section of the web foot angle can correspond to the rear side of the leg of the web foot section which is remote from the web support section.
  • the web foot angle can have a continuous surface, which preferably corresponds to the back side of both legs of the web foot section facing away from the web carrier section and which, accordingly, can be substantially planar or arched.
  • the gap between the web foot angle and the insert is preferably first filled with material and then further material is introduced in the region of the web foot angle to form the other leg.
  • the molding device comprises at least two web foot angles, which are each associated with a T-shaped web foot portion of the web to be produced.
  • the main shape, the at least one insert and possibly the at least one web foot angle are preferably designed to be elongated in accordance with the elongated configuration of the web to be produced.
  • the shaping surfaces of the main form, the insert and / or the web foot angle preferably have in a direction that transversely and in particular at least anna Hernd perpendicular to the longitudinal direction of the main Fornn, the insert or the web foot angle is oriented.
  • the main form may have a length of at least 10 m, preferably at least 30 m and particularly preferably at least 50 m.
  • the width of the main form ie the extent of the main shape in the width direction of the main shape, which preferably corresponds to the height direction of the web to be produced, may also be from 10 cm to several meters.
  • the main shape along its length has a cross-sectional shape of its shaping surfaces, which is adapted to the shape of the web to be produced in the respective length section.
  • the molding device is adapted only over part of its length for the production of T-shaped foot sections and adapted in other lengths to the production of C-feet is. Accordingly, the molding apparatus can be provided with at least one recess only over a part of its length, which enables the production of a T-foot section in the manner described above.
  • the molding device may have a particularly substantially planar shaping surface, which preferably continues the transition-free and seamlessly free movement of the shaping surface section of the main section delimiting the depression.
  • the shaping device can also have at least one depression as described above over its entire length.
  • the at least one insert is preferably elongated and may have a length which corresponds at least approximately to the length of the corresponding depression or of the T-foot section to be produced.
  • the insert comprises or is formed from a material selected from the group consisting of glass fiber reinforced plastics, epoxy resins, polyureas, silicones, polyurethanes, foams, in particular rigid foams, and wood, in particular balsa wood.
  • the insert comprises or consists of a material which has similar properties and in particular at least approximately the same thermal conductivity as the material of the main form. This ensures that the insert and the main form regardless of temperature influences exactly their desired shape and predetermined mutual positioning obtained and thus a desired web shape can be created and mechanical stresses are avoided.
  • the insert and the main form may comprise or consist of an epoxy resin.
  • the material of the insert can have a Shore D hardness measured according to ISO 868 between 40 to 80 Shore D and in particular between 65 and 75 Shore D.
  • the insert may include a suitable heater.
  • the heat-conducting structure may comprise a metallic fleece.
  • the heat-conductive material may comprise an aluminum powder with which the epoxy or cast resin is added.
  • the heat-conducting structure also comprise a metallic grid.
  • the heat-conducting material or the heat-conducting structure may be arranged in the vicinity of a, in particular shaping, surface of the insert and / or at least partially form the same.
  • the at least one web foot angle of the shaping device may comprise a heat-conducting material as described above and / or a heat-conducting structure as described above, for example a metallic fleece.
  • Another object of the present invention is a method for producing a molding apparatus as described above for producing a T-bar for a rotor blade of a wind turbine.
  • the method comprises the following steps:
  • the main mold is molded using the previously prepared insert, it is ensured that the insert fits exactly into the main shape produced and thus a gap and joint low receiving the insert is possible in the main shape, which allows a burr-poor production of the web.
  • using the main mold or the one or more model parts, which at least partially have the shape of the main shape, and one or more model parts, which at least partially have the shape of another web, another insert is molded. This ensures that the other insert is precisely inserted into the same main form.
  • the further inserter is smaller than the insert used for the production of the main mold.
  • Another object of the present invention is a method for producing a T-bar for a rotor blade of a wind turbine using a molding apparatus according to the present description.
  • the method comprises, that
  • the at least one insert is inserted in the main form
  • the material for the T-bar to be produced is introduced into the molding device,
  • the bridge is shaped and
  • the molding apparatus allows the flexible adaptation of the geometry of a T-bar and the production of a T-bar with an undercut geometry without the risk of damage or material overloads during manufacture.
  • the web is preferably composed of a material which comprises or consists of a fiber composite material, in particular a glass fiber reinforced plastic (GRP) or carbon fiber reinforced plastic (CFRP).
  • a vacuum infusion method for forming the web in which first dry fiber material, such as a glass fiber reinforcing material or a carbon fiber reinforcing material, which is made up as a scrim, fabric or in mat form, is inserted into the molding apparatus. Then, the forming device with the inserted fiber material is sealed by a film and a vacuum is applied before the liquid resin-hardener mixture or matrix material forming the matrix of the fiber composite material is sucked into the fiber material by the applied vacuum. As soon as the fibers are completely saturated with the matrix material, the feed of the matrix material is terminated and the matrix material is hardened by heating to the appropriate temperature.
  • first dry fiber material such as a glass fiber reinforcing material or a carbon fiber reinforcing material, which is made up as a scrim, fabric or in mat form
  • the T-bridge is demolded together with the at least one insert in a first direction of the main shape and then the insert removed from the web in a different direction from the first direction of the second direction.
  • the web foot portion forms with the at least one insert effective in the first direction undercut, without there being an excessive material loading of the web or damage in the demolding.
  • the insert be provided with a release agent before insertion of the insert into the main mold, which facilitates removal from the mold.
  • the insert is attached to at least one shaping surface section, ie an outer surface section, which is formed when the raw material for the web is introduced into the molding device with the web. material comes into contact with, as well as with a surface portion which comes into contact with the main shape, provided with release agent.
  • Another object of the present invention is an insert for a molding apparatus for producing a T-bar for a rotor blade of a wind turbine, wherein the insert is formed at least partially complementary to at least one recess of a main shape of the molding apparatus and the insert is designed so that when the insert is laid in the at least one recess of the main mold, a first surface portion of the insert is flush with a shaping surface portion of a main portion of the main mold disposed outside the recess, and the first surface portion of the insert is on a side thereof opposite to the forming surface portion of the main portion second surface portion is limited, which extends into the at least one recess.
  • Such a insert is suitable for use in a molding apparatus according to the invention with the advantages and possible advantageous embodiments described above.
  • FIG. 2 shows a T-bar for a rotor blade for a wind turbine in a partially sectioned perspective view.
  • FIG. 3 shows a section of a main form for a molding device according to an embodiment of the invention in a perspective view; a section of a main form of Figure 3 comprehensive molding apparatus according to an embodiment of the invention in a perspective view;
  • FIG. 5 shows the molding apparatus of FIG. 4 with a T-bar formed therein;
  • FIG. 6 shows the molding apparatus of FIGS. 4 and 5 in cross-section
  • FIG. 7 shows a molding device with a main mold according to FIG. 3 and with an alternative insert inserted into the main mold
  • FIG. 8 shows an arrangement for producing an insert for a molding device
  • Fig. 9 shows an arrangement for producing a main mold for a molding apparatus
  • Fig. 1 shows a rotor blade for a wind turbine in cross-section or in profile representation.
  • the rotor blade is composed of two rotor half shells 10, 12, which form the outer skin of the rotor blade.
  • the straps 14, 16 of the two rotor half-shells 10, 12 are connected to one another by at least one web 18, which is likewise designed to be elongate in the longitudinal direction of the rotor blade and which has a length between the two straps 14, 16.
  • ckenden plate-shaped and planar web support portion 20 and at each end of the web support portion 20 has a web foot section 24, 26.
  • the web foot sections 24, 26 are both substantially T-shaped with two legs 28, 30, 32, 34 projecting in different directions from the web support section 20.
  • the angles at which the foot sections 24, 26 protrude from the web support section 20 are adapted to the profile of the rotor blade in such a way that the web foot sections 24, 26 with their back sides 36, 38 complementarily shaped relative to the webs 14, 16, respectively, flatly on the associated belt 14, 16 abut with which they are connected.
  • the profile of the rotor blade in the present exemplary embodiment means that the upper side 42 of the leg 30 facing the flat side 40 of the web carrier section 20 is formed to form the rear sides 36, 38 an acute outer angle ⁇ protrudes from the web support portion 20, so that the T-bar 18 has a relation to the direction perpendicular to the main plane of the web support portion 20 undercut profile.
  • Fig. 2 shows the web 18 of the rotor blade of Fig. 1 in a partially sectioned perspective view. As shown in FIG. 2, the web 18 is elongated in the longitudinal direction x 'and has a double-T-shaped cross-sectional shape with a web support section 20 oriented parallel to the height direction z' of the web 18 and two in the width or thickness direction y 'of the web extended web foot sections 24, 26 on.
  • Fig. 3 shows a section of a main mold 44 of a molding apparatus for producing a T-bar as shown in Figs. 1 and 2.
  • the main mold 44 is elongated in the longitudinal direction x and has various longitudinal sections 46, 48 which follow one another in the longitudinal direction x.
  • the section 46 serves to produce a longitudinal section of the web with a substantially C-shaped cross section and has a shaping surface 50 extending over the entire width measured in the y direction for the web to be formed, which is at least approximately planar and perpendicular to the height direction z of the main shape 44 is oriented.
  • the section 48 serves to form a longitudinal section of the web with a substantially double-T-shaped cross section as shown in FIG. 2.
  • the main shape has a main section 52 arranged with respect to the width direction y approximately in the center of the main mold 44, and recesses 54, 54 'defined on both sides of the main section 52 by the main section 52.
  • the main section 52 has on both sides in each case a surface section 56, 56 'which surrounds the respective recess 54, 54' and has a surface 57, 56 'which adjoins the surface section 56, 56' and forms an edge 57, 57 'outside the latter Recesses 54, 54 'arranged shaping surface portion 60, which continues the forming surface 50 and is oriented at least substantially planar and perpendicular to the height direction z of the main form 44.
  • FIG. 4 shows a section of a forming device for producing a web according to an embodiment of the invention, which comprises the main form 44 shown in FIG. 3.
  • the section shown in FIG. 4 corresponds to the front left section of the illustration of FIG. 3.
  • the molding apparatus comprises, in addition to the main mold 44, an insert 58 which is also elongate in the longitudinal direction x and which is inserted in the recess 54.
  • the insert 58 has a first shaping surface portion 62, which is flush with the edge 57 and parallel to the surface portion 60 is oriented and continues it, so that the surface portions 60, 62 together form an at least substantially planar and at least approximately gap and edge-free contiguous shaping surface portion for the web support portion of the web to be produced.
  • the insert 58 comprises a further, second shaping surface section 64, which extends from the surface section 62 in the direction of the bottom surface 66 of the recess 54 and encloses an inner angle ⁇ with the surface section 62.
  • the insert 58 rests on the surface portion 56 and the bottom surface 66 and is thereby fixed in the recess 54.
  • the insert 58 has on its underside a projection 72, which engages in a groove 74 of the main form 44 and creates an effective in the width direction y form-fitting connection of the insert 58 with the main form 44.
  • the bottom surface 66 and the surface section 70 can also abut against one another without undercuts and can for this purpose be substantially flat, as indicated in FIG. 4 by a dashed line 75.
  • the 74 illustrated in the insert 58 shown in FIG. 4 is purely purely optional and the insert 58 can also perform without such a groove 74 and the main form 44 part of the insert even without projection 72 their functions.
  • the molding apparatus further comprises a ridge foot angle 76 elongated in the longitudinal direction x and placed on the bottom surface 66 of the recess 54 with an at least substantially planar or curved forming surface portion 78 facing and facing the surface portion 64 of the insert 58.
  • the surface section 78 is essentially are oriented parallel to the surface portion 64 of the insert 58, so that between the web foot angle 76 and the insert 58, a gap with a predetermined by the at least approximately constant distance between the surface portions 78, 64 substantially constant gap width for receiving the raw material for the leg of a Stegfußabitess is formed.
  • the molding apparatus shown in FIG. 4 is filled from above with the corresponding raw material, in particular glass fiber reinforcing materials and a resin as matrix material.
  • FIG. 5 shows the molding apparatus of FIG. 4 with a web 18 formed therein.
  • the longitudinal direction x of the molding apparatus corresponds to the longitudinal direction x 'of the manufactured web 18, while the width direction y of the molding apparatus corresponds to the height direction y' of the web 18 and the height direction z the shaping device of the width or thickness direction z 'of the web 18 corresponds.
  • the forming surface portions 60, 62 define one of the flat sides 40 of the web support portion 20 of the web 18 which is built up on these surface portions 60, 62.
  • the angle ⁇ of the insert 58 determines the angle between the flat side 40 of the web 18 and the top 42 of the leg 30 and thus corresponds to the angle ⁇ shown in FIG. 1.
  • the other leg 28 of the web foot portion 24 is formed by applying additional raw material to the web support portion 20 generated in the region of the web foot angle 76, wherein in FIG. 5 only one stump of the leg 28 is shown. In reality, the leg 28 may protrude just as far from the web support portion 20 as the leg 30, for which purpose the web foot angle 76 is designed to be correspondingly higher.
  • the right side of the molding apparatus not shown in FIGS. 4 and 5 may be the same or similar to the illustrated left side, so that also at the other end of the web support portion 20 a foot portion 24 as shown in FIG. 4 is formed.
  • raw material is likewise introduced into the molding apparatus and placed on the shaping surface 50.
  • the web 18 there are also provided two web foot angles as shown in FIGS. 4 and 5, which each allow the construction of an upwardly projecting web leg, so that the web 18 in this length section 46 obtains a C-shaped cross section.
  • Fig. 6 shows the molding apparatus of Figs. 4 and 5 as a whole in cross-section with a web 18 formed therein.
  • the components on the left side of the molding apparatus shown in Figs. 4 and 5 symmetrical components on the right side of the molding apparatus are in the Fig. 6 marked with the corresponding primed reference numerals.
  • the web foot angles arranged in the two recesses are not shown in FIG. As can be seen from FIG.
  • the two inner angles a, a 'of the inserts 58' form an angle total of less than 180 degrees, so that the web 18 alone is not in the direction perpendicular to the shaping surface portions 60, 62, 62 '. , ie in the height direction z of the molding apparatus, demoulding.
  • the two inner angles ß, ß 'between the forming surface portion 60 and the respective recess 54, 54' surrounding sections 56, 56 ' form an angle total of more than 180 degrees, so that the web 18 and the two inserts 58, 58 'Together without undercuts and thus easily, for example in the height direction Z, can be removed from the molding device.
  • the inserts 58, 58 ' which were initially treated with a release agent, eg in the width direction y are demolded from the web 18, so that the T-bar 18 despite its strongly undercut geometry without any risk of damage from the molding apparatus is demolded ,
  • the inserts 58, 58 ' also possible in a range of directions which are inclined to the height direction z.
  • demolding is also possible, for example, in all directions parallel to the cross-sectional plane shown in FIG. 6, which are inclined relative to the z-direction by up to ⁇ -90 ° or ⁇ -90 °.
  • angles ⁇ and a 'as well as ⁇ and ⁇ ' are each at least approximately equal.
  • the angles ⁇ and a 'as well as ⁇ and ⁇ ' can, however, in principle also deviate from one another.
  • inserts 58, 58 allows the adaptation of the dimensions of the web 18 and in particular the web height to a desired rotor blade profile.
  • the height H of the web which is related to the web support portion 20, is determined by the distance between the outermost edges of the inserts 58, 58 'in the width direction y.
  • FIG. 7 shows the section of the molding device shown in FIGS. 3 to 5 with another insert 80 inserted in the depression 54.
  • the insert is designated below by the reference numeral 80, 80 '.
  • the insert 80, 80 ' corresponds in its essential features the inserts 58, 58', wherein like reference numerals of the insert 80, 80 'identify the same components.
  • the insert 80, 80 'in the width direction y of the molding apparatus is designed to be shorter than the inserts 58, 58'. By inserting one or two such shorter inserts 80, 80 ', the molding apparatus is convertible so that a web with a lower height H than with the molding apparatus shown in FIG.
  • the gap width between the insert 80, 80 'and the web foot angle 76 can thereby be adapted and, in particular, kept constant so that the web foot angle 76 is placed on the bottom 66 at a correspondingly shorter distance from the main section 52.
  • FIG. 8 shows an arrangement for producing an insert 58 for a molding apparatus shown in FIGS. 4 to 7.
  • the arrangement comprises a base plate 82, two model parts 84, 86, the shape of which corresponds in sections to the shape of the main form 44 of the molding device, and a model part 88, the shape of which corresponds at least in sections to the shape of the web 18 to be produced.
  • These model parts 84, 86, 88 are arranged relative to each other so that a free space in the form of the insert 58 to be produced remains between them. In this free space, the raw material for the insert 58 is introduced and the insert is molded.
  • the model part 84 can be dispensed with; the insert 58 can be made directly on the base plate 82.
  • FIG. 9 shows an arrangement for producing a main mold for the molding device of FIGS. 4 to 7.
  • the arrangement comprises the model part 88 shown in FIG. 8, the shape of which corresponds to the web 18 to be produced, the insert 58 shown in FIG and the base plate 82. These components are arranged so that they form a free space, the shape of the main form 44 corresponds. The raw material for the main mold 44 is placed in this space and the main mold 44 is molded.
  • Fig. 10 shows an arrangement for producing a further insert 80, 80 'for the molding apparatus shown in Fig. 4 to 7.
  • the arrangement comprises the base plate 82 shown in FIG. 7, the model parts 84, 86 shown in FIG. 7, whose shape corresponds to the main shape, and another model part 90, the shape of which corresponds in sections to another web to be produced with a smaller web height.
  • These components are arranged relative to each other so that they form a free space whose shape corresponds to the insert 80, 80 'to be produced.
  • the raw material for the insert 80, 80 ' is introduced into this space and the insert 80, 80' is molded.
  • the insert 80, 80 'could also be made using the main mold 44 ( Figure 9) instead of the model parts 84, 86.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Abstract

L'invention concerne un dispositif de moulage permettant de fabriquer un élément de liaison en T (18) pour une pale de rotor d'une éolienne. Le dispositif de moulage comprend un moule principal (44) et au moins un insert (58, 58'). Le moule principal comporte au moins un creux (54, 54'). Le au moins un insert est conçu au moins par endroits de manière complémentaire audit au moins un creux du moule principal et le au moins un insert et le moule principal sont conçus de manière que, lorsque le au moins un insert est inséré dans le au moins un creux du moule principal, une première partie superficielle (62, 62') de l'insert est adjacente, au moins sensiblement à fleur, à un bord (57, 57') de la partie principale délimitant la partie de surface conférant la forme, et la première partie superficielle de l'insert est délimitée sur sa face opposée à la section de surface conférant la forme, de la partie principale, par une deuxième partie superficielle (64, 64'), laquelle s'étend à l'intérieur du au moins un creux.
PCT/EP2013/076910 2012-12-19 2013-12-17 Dispositif de moulage variable permettant de fabriquer un élément de liaison en t pour une pale de rotor d'une éolienne et procédé de fabrication dudit dispositif WO2014095870A1 (fr)

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DE102012223707.0 2012-12-19
DE102012223707.0A DE102012223707A1 (de) 2012-12-19 2012-12-19 Variable Formvorrichtung zur Herstellung eines T-Stegs für ein Rotorblatt einer Windenergieanlage und ein Verfahren zu deren Herstellung

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CN111742136A (zh) * 2018-02-14 2020-10-02 乌本产权有限公司 用于制造分体式转子叶片的方法以及转子叶片
US10919247B2 (en) 2016-06-15 2021-02-16 Vestas Wind Systems A/S Method and apparatus for making a shear web

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DE102011082664C5 (de) * 2011-09-14 2017-08-10 Senvion Gmbh Form zur Herstellung eines Steges und Steg für ein Rotorblatt einer Windenergieanlage
CN107107399A (zh) * 2014-10-30 2017-08-29 Lm Wp 专利控股有限公司 包括可变模板的抗剪腹板模具系统
DE102017106850A1 (de) * 2017-03-30 2018-10-04 Deutsches Zentrum für Luft- und Raumfahrt e.V. Verfahren und Vorrichtung zum Herstellen eines Faserverbundbauteils
DE102017126276A1 (de) 2017-11-09 2019-05-09 Nordex Energy Gmbh Verfahren zur Herstellung einer Steg-Gurt-Baugruppe für ein Windenergieanlagenrotorblatt und Steg-Gurt-Baugruppe
DE102017010651A1 (de) 2017-11-17 2019-05-23 Senvion Gmbh Steg für ein Rotorblatt einer Windenergieanlage und Verfahren zum Herstellen eines Stegs
EP4008534A1 (fr) * 2020-12-03 2022-06-08 LM Wind Power A/S Méthode méthode de fabrication d'un chapeau de longeron d'une pale d'éolienne
WO2023083892A1 (fr) * 2021-11-10 2023-05-19 Lm Wind Power A/S Procédé de fabrication d'une pièce composite à arêtes vives pour pale d'éolienne

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EP0781639A2 (fr) * 1995-12-26 1997-07-02 Teijin Seiki Co., Ltd. Moule fait d'une résine photodurcie contenant un agent renforçant
WO2013037466A1 (fr) * 2011-09-14 2013-03-21 Repower Systems Se Moule et procédé de fabrication d'une entretoise, et entretoise pour une pale de rotor d'une éolienne

Cited By (3)

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US10919247B2 (en) 2016-06-15 2021-02-16 Vestas Wind Systems A/S Method and apparatus for making a shear web
CN111742136A (zh) * 2018-02-14 2020-10-02 乌本产权有限公司 用于制造分体式转子叶片的方法以及转子叶片
CN111742136B (zh) * 2018-02-14 2023-08-18 乌本产权有限公司 用于制造分体式转子叶片的方法以及转子叶片

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