CN101749194B - Wind turbine blade for large-scale wind generating set, and molding method thereof - Google Patents
Wind turbine blade for large-scale wind generating set, and molding method thereof Download PDFInfo
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- CN101749194B CN101749194B CN2009101918575A CN200910191857A CN101749194B CN 101749194 B CN101749194 B CN 101749194B CN 2009101918575 A CN2009101918575 A CN 2009101918575A CN 200910191857 A CN200910191857 A CN 200910191857A CN 101749194 B CN101749194 B CN 101749194B
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- 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
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Abstract
The invention discloses a wind turbine blade for a large-scale wind generating set (wind-power blade for short). The wind-power blade has a thin shell structure and is combined by adhering two pieces of semi-shells; crossbeams which are extended from a blade root to a blade tip are respectively arranged in the two shells of the blade; a main shear web is adhered between the two crossbeams so as to form an I-shaped structure; a trailing edge shear web which is parallel to the main shear web is arranged on the side, between the two shells, close to the trailing edge; and the upper end and the lower end of the trailing edge shear web are respectively connected with the two shells. The invention also discloses a molding method for the wind turbine blade, which comprises the step of performing one-time molding on the crossbeams, a blade root enhancement layer and a shell by the technology of vacuum perfusion (RIM). Due to the adoption of the solution of the one-time molding technology, the quality defect caused by post molding of a composite material is avoided, the structural strength of a manufactured wind-power blade is improved and the service life of the manufactured wind-power blade is prolonged, and production efficiency is remarkably improved and production cost is reduced.
Description
Technical field
The present invention relates to a kind of wind power plant parts and manufacture method thereof, especially a kind of wind turbine blade for large-scale wind generating set and forming method thereof.
Background technique
Wind turbine blade for large-scale wind generating set (being called for short " wind electricity blade ") is thin-shell construction, makes of composite material usually, combines by the two halves shell is bonding.The stressed one side of pressure-bearing of generally wind electricity blade being facingd the wind is called pressure side (PressureSide), and leeward one side is called suction surface (Suction Side).
At present, the moulding technique of wind electricity blade mainly contains:
(1) hand is stuck with paste technology and is derived on this basis and develops and next wet method preimpregnated process;
(2) vacuum perfusion process also claims vacuum introductory technique (Resin Infusion Moulding, abbreviation RIM);
(3) prepreg moulding process, because of with high costs, not having independently substantially, wind electricity blade manufacturing enterprise adopts this production technology.
In recent years, comparatively Xian Jin wind electricity blade forming technique is generally taked repeatedly moulding process: the primary load bearing member of wind electricity blade---crossbeam, blade root enhancement layer adopt respectively that vacuum perfusion process is prefabricated spreads layer with wind electricity blade housing, structure sandwich material after finishing again, and adopts the vacuum perfusion process moulding to finish.This repeatedly moulding process decision needs three secondary above moulds just can finish the manufacturing of wind electricity blade at least.In addition, also exist composite material repeatedly shaping influence structural strength and working life etc. critical defect, and the equipment input is many, factory building investment big, production process is many, causes manufacturing efficiency low, has increased the manufacture cost of wind electricity blade.
Summary of the invention
Purpose of the present invention provides a kind of wind turbine blade for large-scale wind generating set, and it is simple and reliable for structure, intensity height, good rigidity, and manufacture cost is lower.
The present invention also provides the forming method of this wind turbine blade for large-scale wind generating set, this technological method can avoid influencing the appearance of critical defects such as wind electricity blade structural strength and working life to greatest extent, and can significantly improve the manufacturing efficiency of wind electricity blade, reduce the manufacture cost of wind electricity blade greatly.
A kind of wind turbine blade for large-scale wind generating set of the present invention, be thin-shell construction, combine that the leading edge of pressure side and suction surface is connected by the leading edge angle of attachment by pressure side and the case bonding of suction surface two halves, the trailing edge of pressure side and suction surface is connected by the trailing edge angle of attachment, it is characterized in that:
In the pressure side of blade and suction surface housing, be respectively arranged with the crossbeam that extends to blade tip from blade root, the big about 430mm of beam width, the corresponding kernel of section line of two crossbeams is perpendicular to the blade profile string of a musical instrument (string of a musical instrument is the leading edge line on summit and trailing edge least significant end summit foremost), this hang down put apart from blade inlet edge foremost vertex distance be 29% of string of a musical instrument length; Between two crossbeams of pressure side and suction surface, be bonded with a main shear web, thereby constitute " worker " shape structure;
Be provided with a trailing edge shear web at pressure side and suction surface by between trailing edge one side, this trailing edge shear web is parallel with main shear web, and upper/lower terminal is bonding with pressure side and suction surface respectively.
Blade root, crossbeam, main shear web, trailing edge shear web, leading edge angle of attachment, trailing edge angle of attachment and the critical piece that provides the wind electricity blade strength and stiffness by the blade shell sandwich structure that pressure side and suction surface form.
Described a kind of wind turbine blade for large-scale wind generating set, outside enhancement layer is superimposed forms by the inner enhancement layer of blade root enhancement layer, blade root and blade root for its leaf root part that is connected with the wheel hub of wind power generating set; The blade root enhancement layer adopts twin shaft alternately to lay and form to glass fiber cloth (EKU900[0] E-1260) to glass fiber cloth (EKB800[± 45 °] E-1260) and single shaft, inner enhancement layer of blade root and outside enhancement layer all adopt (EKT800[+45 ° of three axial glass fiber cloth, 90 ° ,-45 °] E-1260).
The twin shaft of wherein forming the blade root enhancement layer to glass fiber cloth (EKB800[± 45 °] E-1260) and single shaft to glass fiber cloth (EKU900[0] E-1260), form (EKT800[+45 ° of the three axial glass fiber cloth of the inner enhancement layer of blade root, 90 ° ,-45 °] E-1260) in the priming by vacuum step, combine by the saturated ring epoxy resins; The three axial glass fiber cloths (EKT800[+45 °, 90 ° ,-45 °] E-1260) of forming the outside enhancement layer of blade root are after wind electricity blade leaves mould, and hoop is wrapped in the blade root outside in the wet method process step; The blade root thickness sum that final curing is finished is controlled at 80mm ± 5mm.
The main shear web and the trailing edge shear web of every wind electricity blade are prefabricated component, coat PVC or the PS foam is made by twin shaft to glass fiber cloth (EKB800[± 45 °] E-1260); The thickness of main shear web is 80mm ± 5mm; Trailing edge shear web thickness is 40mm ± 5mm, as the support of " worker " shape structure, to increase wind electricity blade rigidity, also guarantees that pressure side and suction surface good bonding constitute the wind electricity blade housing simultaneously.
Crossbeam is made up of to glass fiber cloth (EKU900[0] E-1260) the multilayer single shaft; Lay respectively at the top and the bottom of main shear web, its role is to increase the flexural rigidity and the intensity of wind electricity blade.Crossbeam is to pour into simultaneously with the inner enhancement layer of blade root enhancement layer, blade root and blade shell partial pressure face and suction surface in priming by vacuum operation process to finish in blade mold.
Leading edge angle of attachment and trailing edge angle of attachment are prefabricated component, form and make to glass fiber cloth (EKU600[0] E-1260) to glass fiber cloth (EKB800[± 45 °] E-1260) and single shaft by twin shaft, about 120mm ± 5mm is wide, along the whole length of blade, play the effect that connects pressure side and suction surface and improve abutting edge intensity.
The forming method of this wind turbine blade for large-scale wind generating set of the present invention, its step is as follows:
FREKOTE 55-NC), obliterating demoulding wax (demoulding wax brand: TR MOLD RELEASE) on the mould flange first step, pressure side mould are handled: (the releasing agent brand: of brushing semipermanent releasing agent in the die face of the pressure side mould of wind electricity blade;
Second step, lay release cloth: the part that after the wind electricity blade demoulding, need carry out post forming: comprise that the outside back to blade tip strengthens part (the about 100mm of width) to blade inlet edge from blade root, trailing edge from blade root to laying release cloth in the die face of blade root end face 12500mm place (the about 100mm of width);
In the 3rd step, lay glasscloth and structural core: on the pressure side mould of wind electricity blade, lay external layer glasscloth layer, structural foam core, form blade primary load bearing member---the glasscloth of crossbeam, blade root enhancement layer, the inner enhancement layer glasscloth of blade root and pressure side inner surface layer glasscloth;
In the 4th step, lay and vacuumize auxiliary material: laying release cloth, isolating film, water conservancy diversion net on the pressure side mould of completing steps three, arrange resin flows path Ω pipe and resin ascending pipe;
In the 5th step, arrange vacuum-pumping pipeline: vacuumize volute and vacuum-pumping tube along mould flange periphery stickup sealing joint strip, layout;
In the 6th step, constitute vacuum system: whole one deck vacuum bag film that covers on the pressure side mould of wind electricity blade, vacuum bag film sealing joint strip and the pressure side mould by the mould flange periphery is bonding and consist of a closed system;
In the 7th step, connect vacuum-pumping tube: vacuum-pumping tube is connected with vacuum system through the resin collecting tank;
In the 8th step, startup vacuumizes: degree of vacuum reaches requirement, and (0.1MPa) back checks that the vacuum system that vacuum bag film and pressure side mould are formed has not hole and gas leakage, searches mending-leakage;
In the 9th step, inject mixing back resin: accurately (mixed weight is than being AIRSTONE760E epoxy resin: 766H curing agent=100: 32), mix back resin, sized glass fibres fabric by the injection of resin ascending pipe for ratio blending epoxy and curing agent;
In the tenth step, heating Procuring: the epoxy resin adhesive liquid after to be mixed is heated to 70 ℃ of insulations 3 hours, the wind electricity blade pressure side housing that the Procuring moulding is finished with LDJ-39S-1K (model) water heater after having crossed exothermic peak;
In the 11 step, bonding shear web: (mixed weight is than being AIRSTONE 770E epoxy resin: 778H curing agent=100: 47) bonding blade master shear web, trailing edge shear web with the epoxy resin structural adhesive stick in the wind electricity blade pressure side housing that Procuring is finished; Be heated to 70 ℃ of insulations 3 hours with LDJ-39S-1K (model) water heater, be cured;
FREKOTE 55-NC), mould flange edge obliterating demoulding wax (demoulding wax brand: TR MOLDRELEASE) in the 12 step, the suction surface mould is handled: (the releasing agent brand: of brushing semipermanent releasing agent in the die face of the suction surface mould of wind electricity blade;
The 13 step, lay release cloth: the part that after the wind electricity blade demoulding, need carry out post forming: comprise that the outside back to blade tip strengthens part (the about 100mm of width) to blade inlet edge from blade root, trailing edge from blade root to laying release cloth in the die face of blade root end face 12500mm place (the about 100mm of width);
In the 14 step, lay glasscloth and structural core: on the suction surface mould of wind electricity blade, lay external layer glasscloth layer, structural foam core, form blade primary load bearing member---the glasscloth of crossbeam, blade root enhancement layer, the inner enhancement layer glasscloth of blade root and suction surface inner surface layer glasscloth;
In the 15 step, lay and vacuumize auxiliary material: on the suction surface mould of completing steps 14, lay release cloth, isolating film, water conservancy diversion net, arrange resin flows path Ω pipe and resin ascending pipe;
In the 16 step, arrange vacuum-pumping pipeline: vacuumize volute and vacuum-pumping tube along mould flange periphery stickup sealing joint strip, layout;
In the 17 step, constitute vacuum system: the blade suction surface mold integral covers one deck vacuum bag film, and sealing joint strip and the suction surface mould of vacuum bag film by the mould flange periphery is bonding and consist of a closed system;
In the 18 step, connect vacuum-pumping tube: vacuum-pumping tube is connected with vacuum system through the resin collecting tank;
In the 19 step, startup vacuumizes: degree of vacuum reaches requirement, and (0.1MPa) back checks that the vacuum system that vacuum bag film and suction surface mould are formed has not hole and gas leakage, searches mending-leakage;
The 20 step, inject and mix the back resin: accurately (mixed weight is than being AIRSTONE760E epoxy resin: 766H curing agent=100: 32) for ratio blending epoxy and curing agent, inject mixing back resin, sized glass fibres fabric by resin ascending pipe (22);
In the 21 step, heating Procuring: the epoxy resin adhesive liquid after to be mixed is heated to 70 ℃ of insulations 3 hours, the wind electricity blade suction surface housing of Procuring moulding with LDJ-39S-1K (model) water heater after having crossed exothermic peak;
The 22 step, matched moulds:
A. pile up the epoxy resin structural adhesive stick: load onto blade inlet edge angle of attachment and trailing edge angle of attachment in wind electricity blade pressure side housing, (mixed weight is than being AIRSTONE 770E epoxy resin: 778H curing agent=100: 47) to pile up the epoxy resin structural adhesive stick on blade inlet edge edge and trailing edge edge, main shear web and trailing edge shear web;
B. the wind electricity blade suction surface mould that overturns is fastened on wind electricity blade suction surface housing on the wind electricity blade pressure side housing;
In the 23 step, solidify behind the wind electricity blade: be heated to 70 ℃ of insulations 6 hours with LDJ-39S-1K (model) water heater, carry out the back and solidify;
The 24 step, the demoulding: upset wind electricity blade suction surface mould, solidify the wind electricity blade of finishing with the back and hang out in wind electricity blade pressure side mould;
In the 25 step, the wind electricity blade blade root is outer to strengthen and back processing: twine the outside enhancement layer of blade root in the outside of blade root, be heated to 70 ℃ of insulations 6 hours, carry out the back and solidify; The excision burr; The cutting blade root end is also processed T type bolt mounting holes;
The 26 step, the enhancing of wind electricity blade front and rear edge, surface treatment and annex are installed: (it is AIRSTONE760E epoxy resin that mixed weight compares: 762H curing agent=100: 32) to flood mixed epoxy resin with two-layer twin shaft to glass fiber cloth (EKB800[± 45 °] E-1260) (the about 120mm of width), manual then front and back and the trailing edge that coats the enhancing wind electricity blade need strengthen part, be heated to 70 ℃ of insulations 6 hours, carry out the back and solidify; Carry out the installation of surface treatment and annex.
Strict release cloth, isolating film, water conservancy diversion net and layout resin flows path Ω pipe and the resin ascending pipe of laying by described process step is the key of this moulding technique.Though the parts glass fibres such as blade root, blade girder, blade shell that adopt the wind electricity blade of this forming method axially, method of knitting, variable thickness, adopt above-mentioned moulding technique still can be in the vacuum perfusion process process partial pressure face and the disposable infiltration resin forming of suction surface.
The present invention compares with prior art and has the following advantages:
(1) blade girder in the prior art, the blade root enhancement layer need be pre-formed respectively, and then is shaped to one with blade shell by instillation process.The present invention has realized that blade girder, blade root enhancement layer and blade shell partial pressure face and suction surface finish by the instillation process once-through, has solved many drawbacks that existing backward process engineering causes fully;
The result of damage in use will finally appear destroying in useful life period in the critical defect that (2) the post forming meeting of composite material exists that interlayer is bonding in the prior art, bubble etc. has a strong impact on quality of product.Wind turbine blade for large-scale wind generating set moulding technique provided by the invention can avoid influencing the appearance of critical defects such as wind electricity blade structural strength and working life to greatest extent.
(3) blade girder, the prefabricated this repeatedly moulding process decision of blade root enhancement layer need three secondary above moulds just can finish the manufacturing of wind electricity blade at least in the prior art.The present invention's minimizing equipment to greatest extent drops into, reduces the factory building investment, simplifies production process, enhances productivity, and reduces the manufacture cost of wind electricity blade.
Description of drawings
Fig. 1 is the structural representation of wind electricity blade.
Fig. 2 is the A-A sectional view (amplification) of Fig. 1.
Fig. 3 is the B-B sectional view (amplification) of Fig. 1.
Fig. 4 is the C-C sectional view (amplification) of Fig. 1
Fig. 5 is a shop of the present invention layer schematic representation.
Fig. 6 is that vacuum aided material-paving of the present invention is arranged schematic representation.
Fig. 7 is a blade matched moulds schematic representation.
Embodiment
Below the invention will be further described.
Referring to Fig. 1, Fig. 2, Fig. 3 and a kind of wind turbine blade for large-scale wind generating set shown in Figure 4, be thin-shell construction, combine by pressure side 15 and suction surface 16 two halves case bondings, the leading edge 6 of pressure side and suction surface is connected by leading edge angle of attachment 9, and the trailing edge of pressure side and suction surface is connected by trailing edge 3 angle of attachment 14; In the pressure side 15 of blade and suction surface 16 housings, be respectively arranged with the crossbeam 11 that extends to blade tip 4 from blade root 1, the about 430mm of crossbeam 11 width, two crossbeams, 11 corresponding kernel of section lines are perpendicular to the blade profile string of a musical instrument (string of a musical instrument is the leading edge line on summit and trailing edge least significant end summit foremost), this hang down point apart from blade inlet edge foremost vertex distance be 29% of string of a musical instrument length; Between two crossbeams of pressure side 15 and suction surface 16, be bonded with a main shear web 12, thereby constitute " worker " shape structure;
Be provided with a trailing edge shear web 13 at pressure side and suction surface by between trailing edge one side, this trailing edge shear web is parallel with main shear web 12, and upper/lower terminal is bonding with pressure side and suction surface respectively; Blade root 1 part that is connected with the wheel hub of wind power generating set is formed by stacking by blade root enhancement layer 1-3, the inner enhancement layer 1-1 of blade root and the outside enhancement layer 1-2 of blade root; Blade root enhancement layer 1-3 adopts twin shaft alternately to lay and form to glass fiber cloth (EKU900[0] E-1260) to glass fiber cloth (EKB800[± 45 °] E-1260) and single shaft, inner enhancement layer 1-1 of blade root and outside enhancement layer 1-2 all adopt (EKT800[+45 ° of three axial glass fiber cloth, 90 ° ,-45 °] E-1260).
The twin shaft of wherein forming blade root enhancement layer 1-3 to glass fiber cloth (EKB800[± 45 °] E-1260) and single shaft to glass fiber cloth (EKU900[0] E-1260), form (EKT800[+45 ° of the three axial glass fiber cloth of the inner enhancement layer 1-1 of blade root, 90 ° ,-45 °] E-1260) in the priming by vacuum step, combine by the saturated ring epoxy resins; The three axial glass fiber cloths (EKT800[+45 °, 90 ° ,-45 °] E-1260) of forming the outside enhancement layer 1-2 of blade root are after wind electricity blade leaves mould, and hoop is wrapped in the blade root outside in the wet method process step; The blade root thickness sum that final curing is finished is controlled at 80mm ± 5mm.
The main shear web 12 and the trailing edge shear web 13 of every wind electricity blade are prefabricated component, coat PVC or the PS foam is made by twin shaft to glass fiber cloth (EKB800[± 45 °] E-1260); The thickness of main shear web 12 is 80mm ± 5mm; Trailing edge shear web thickness is 40mm ± 5mm, as the support of " worker " shape structure, to increase wind electricity blade rigidity, also guarantees that pressure side and suction surface good bonding constitute the wind electricity blade housing simultaneously.
Crossbeam is made up of to glass fiber cloth (EKU900[0] E-1260) the multilayer single shaft; Lay respectively at the top and the bottom of main shear web, its role is to increase the flexural rigidity and the intensity of wind electricity blade.Crossbeam is to pour into simultaneously with the inner enhancement layer of blade root enhancement layer, blade root and blade shell partial pressure face and suction surface in priming by vacuum operation process to finish in blade mold.
Leading edge angle of attachment and trailing edge angle of attachment are prefabricated component, form and make to glass fiber cloth (EKU600[0] E-1260) to glass fiber cloth (EKB800[± 45 °] E-1260) and single shaft by twin shaft, about 120mm ± 5mm is wide, along the whole length of blade, play the effect that connects pressure side and suction surface and improve abutting edge intensity.
Referring to Fig. 5, Fig. 6 and Fig. 7, the forming method of this wind turbine blade for large-scale wind generating set of the present invention, its following steps:
The first step, pressure side mould are handled: obliterating demoulding wax on brushing semipermanent releasing agent, the mould flange 28 in the die face 25 of the pressure side mould 8 of wind electricity blade;
In second step, lay release cloth: after the wind electricity blade demoulding, need carry out laying release cloth 18 in part (comprise blade front and rear edges and blade root outside need to twine the strengthen part) die face 25 of post forming;
In the 3rd step, place the thunder and lightning arrester, lay glasscloth and structural core: the pressure side mould 8 at wind electricity blade is placed the thunder and lightning arrester apart from blade root end face 26250mm and near the blade tip position at trailing edge 300mm place; On pressure side mould 8, lay external layer glasscloth layer 24, structural foam core 10, form blade primary load bearing member---the glasscloth of crossbeam 11, blade root enhancement layer 1-3, the inner enhancement layer 1-1 glasscloth of blade root and inner surface layer glasscloth 17;
Attention: the jointing of thunder and lightning arrester must pass from above-mentioned glasscloth and structural foam core, twines protection with sealing joint strip 26, prevents to damage connecting thread or this joint and damages vacuum bag film 21;
In the 4th step, lay and vacuumize auxiliary material: on the pressure side mould 8 of finishing operation described in the 3rd step, lay release cloth 18, isolating film 19, water conservancy diversion net 20 successively, arrange resin flows path Ω pipe 23 and resin ascending pipe 22;
In the 5th step, arrange vacuum-pumping pipeline: vacuumize volute and vacuum-pumping tube 27 along mould flange 28 edges stickup sealing joint strip 26, layout;
In the 6th step, constitute vacuum system: the whole one deck vacuum bag film 21 that covers on pressure side mould 8, vacuum bag film 21 sealing joint strip 26 by the mould flange periphery and pressure side mould 8 are bonding and consist of a closed system;
In the 7th step, connect vacuum-pumping tube: vacuum-pumping tube 27 is connected with vacuum system through the resin collecting tank;
In the 8th step, startup vacuumizes: degree of vacuum reaches-check that the vacuum system that vacuum bag film 21 and pressure side mould 8 are formed has not hole and gas leakage, searches mending-leakage behind the 0.1MPa;
In the 9th step, inject mixing back resin: accurately (mixed weight is than being AIRSTONE760E epoxy resin: 766H curing agent=100: 32), mix back resin, sized glass fibres fabric by 22 injections of resin ascending pipe for ratio blending epoxy and curing agent;
The tenth step, heating Procuring: be heated to 70 ℃ of insulations 3 hours, the wind electricity blade pressure side housing that the Procuring moulding is finished with LDJ-39S-1K (model) water heater;
In the 11 step, bonding shear web: (mixed weight is than being AIRSTONE 770E epoxy resin: 778H curing agent=100: 47) bonding blade master shear web 12, trailing edge shear web 13 to stick with glue agent in the wind electricity blade pressure side housing that Procuring is finished; Be heated to 70 ℃ of insulations 3 hours with LDJ-39S-1K (model) water heater, carry out adhesive and be heating and curing;
In the 12 step, the suction surface mould is handled: brushing semipermanent releasing agent, mould flange 28 limit obliterating demoulding waxes in the die face 25 of wind electricity blade suction surface mould 7;
In the 13 step, lay release cloth: after the wind electricity blade demoulding, need carry out laying release cloth 18 in part (comprise blade front and rear edges and blade root outside need to twine the strengthen part) die face 25 of post forming;
In the 14 step, lay glasscloth and structural core: on suction surface mould 7, lay external layer glasscloth layer 24, structural foam core 10, form blade primary load bearing member---the glasscloth of crossbeam 11, blade root enhancement layer 1-3, the inner enhancement layer 1-1 glasscloth of blade root and suction surface inner surface layer glasscloth 17;
In the 15 step, lay and vacuumize auxiliary material: on the suction surface mould 7 of finishing operation described in the 14 step, lay release cloth 18, isolating film 19, water conservancy diversion net 20, arrange resin flows path Ω pipe 23 and resin ascending pipe 22;
In the 16 step, arrange vacuum-pumping pipeline: vacuumize volute and vacuum-pumping tube 27 along mould flange 28 edges stickup sealing joint strip 26, layout;
In the 17 step, constitute vacuum system: the whole one deck vacuum bag film 21 that covers on suction surface mould 7, vacuum bag film 21 sealing joint strip 26 by mould flange 28 edges and suction surface mould 7 are bonding and consist of a closed system;
In the 18 step, connect vacuum-pumping tube: vacuum-pumping tube 27 is connected with vacuum system through the resin collecting tank;
In the 19 step, startup vacuumizes: degree of vacuum reaches-check that the vacuum system that vacuum bag film 21 and suction surface mould 7 are formed has not hole and gas leakage, searches mending-leakage behind the 0.1MPa;
In the 20 step, inject mixing back resin: accurately (mixed weight is than being AIRSTONE760E epoxy resin: 766H curing agent=100: 32), mix back resin, sized glass fibres fabric by 22 injections of resin ascending pipe for ratio blending epoxy and curing agent;
The 21 step, heating Procuring: be heated to 70 ℃ of insulations 3 hours, the wind electricity blade suction surface housing that the Procuring moulding is finished with LDJ-39S-1K (model) water heater;
The 22 step, matched moulds:
A. spacer gel stick: load onto blade inlet edge angle of attachment 9 and trailing edge angle of attachment 14 in the blade pressure surface housing, (mixed weight is than being AIRSTONE 770E epoxy resin: 778H curing agent=100: 47) for spacer gel stick on blade inlet edge 6 edges and trailing edge 3 edges, main shear web 12 and trailing edge shear web 13;
B. the suction surface mould 7 that overturns is fastened on the blade suction surface housing on the blade pressure surface housing;
In the 23 step, solidify behind the wind electricity blade: be heated to 70 ℃ of insulations 6 hours with LDJ-39S-1K (model) water heater, carry out the back and solidify processing;
The 24 step, the demoulding: upset suction surface mould 7, solidify the wind electricity blade of finishing with the back and hang out in pressure side mould 8;
In the 25 step, the wind electricity blade blade root is outer to strengthen and back processing: twine the outside enhancement layer 1-2 of blade root in the outside of blade root 1, be heated to 70 ℃ of insulations 6 hours, carry out the back and solidify; The excision burr; The cutting blade root end is also processed T type bolt mounting holes;
The 26 step, the enhancing of wind electricity blade front and rear edge, surface treatment and annex are installed: (it is AIRSTONE760E epoxy resin that mixed weight compares: 762H curing agent=100: 32) to flood mixed epoxy resin with two-layer twin shaft to glass fiber cloth (EKB800[± 45 °] E-1260) (the about 120mm of width), manual then front and back and the trailing edge that coats the enhancing wind electricity blade need strengthen part, be heated to 70 ℃ of insulations 6 hours, carry out the back and solidify; Carry out the installation of surface treatment and annex.
The wind electricity blade annex is installed and is comprised:
(1), the blade root service platform glueds joint installation;
(2), blade root service platform inspection manhole cover plate is installed;
(3), blade root T type bolt is installed.
The wind electricity blade surface treatment comprises:
(1), blade surface polishing;
(2), thoroughly remove the blade surface dust;
(3), blade coating putty (PPG/PS51-1052G);
(4), polishing putty is smooth-going smooth to blade surface;
(5), cleaning blade surface.
Wind electricity blade surface paint (carrying out in the special-purpose paint-spraying baking booth of blade) comprising:
(1), to blade front and rear edge spraying blade specialized paint (PPG/L7253RAL7035);
(2), cross the locally sprayed blade specialized paint in putty place to finishing surface-treated blade blade coating;
(3), treat that above-mentioned locally sprayed place paint solidifies fully, to all surfaces spraying blade specialized paint;
(4), the paint that is heating and curing: 60 ℃ of insulations 45 minutes;
(5), search defectives such as blade surface pin hole, particle projection;
(6), blade coating putty once more, repair surface defects; Polishing putty is smooth-going smooth to blade surface;
(7), at blade surface local defect mend spraying blade specialized paint;
(8), treat that above-mentioned blade surface local defect mend paint curing finishes, all surfaces is sprayed the blade specialized paint once more;
(9), the paint that is heating and curing: 60 ℃ of insulations 45 minutes.
Wind electricity blade equalising torque and packing are dispatched from the factory and are comprised:
(1), finish above-mentioned operation after, to blade weigh, factored moment;
(2), blade grouping equalising torque, packing is dispatched from the factory.
Claims (4)
1. wind turbine blade for large-scale wind generating set, be thin-shell construction, combine by pressure side (15) and suction surface (16) two halves case bonding, the leading edge (6) of pressure side (15) and suction surface (16) is connected by leading edge angle of attachment (9), the trailing edge of pressure side and suction surface (3) is connected by trailing edge angle of attachment (14), it is characterized in that:
In the pressure side (15) of blade and suction surface (16) housing, be respectively arranged with the crossbeam (11) that extends to blade tip (4) from blade root (1), the corresponding kernel of section line of two crossbeams (11) is perpendicular to the blade profile string of a musical instrument, this hang down point apart from blade inlet edge foremost vertex distance be 29% of string of a musical instrument length; Between two crossbeams of pressure side (15) and suction surface (16), be bonded with a main shear web (12), thereby constitute " worker " shape structure;
Be provided with a trailing edge shear web (13) by trailing edge (3) one sides between pressure side (15) and suction surface (16), this trailing edge shear web (13) is parallel with main shear web (12), and upper/lower terminal is bonding with pressure side (15) and suction surface (16) respectively.
2. a kind of wind turbine blade for large-scale wind generating set as claimed in claim 1 is characterized in that: blade root (1) part that is connected with pitch variable bearings on the wind generator unit wheel hub is formed by stacking by blade root enhancement layer (1-3), the inner enhancement layer (1-1) of blade root and blade root outside enhancement layer (1-2); Blade root enhancement layer (1-3) adopt single shaft to glass fiber cloth and twin shaft to glass fiber cloth, the inner enhancement layer of blade root (1-1) adopts three axial glass fiber cloths, the outside enhancement layer of blade root (1-2) employing three axial glass fiber cloths; Three layers thickness sum is 80mm ± 5mm.
3. a kind of wind turbine blade for large-scale wind generating set as claimed in claim 1, its forming method step is as follows:
The first step, pressure side mould are handled: obliterating demoulding wax on brushing semipermanent releasing agent, the mould flange (28) in the die face (25) of the pressure side mould (8) of wind electricity blade;
In second step, lay release cloth: after the wind electricity blade demoulding, need carry out laying release cloth (18) in the part mould profile (25) of post forming;
In the 3rd step, place the thunder and lightning arrester, lay glasscloth and structural core: the pressure side mould (8) at wind electricity blade is placed the thunder and lightning arrester apart from blade root end face 26250mm and near the blade tip position at trailing edge 300mm place; Go up laying external layer glasscloth layer (24), structural foam core (10) at pressure side mould (8), form blade primary load bearing member---the glasscloth of crossbeam (11), blade root enhancement layer (1-3), inner enhancement layer (1-1) glasscloth of blade root and inner surface layer glasscloth (17);
In the 4th step, lay and vacuumize auxiliary material: on the pressure side mould (8) of finishing operation described in the 3rd step, lay release cloth (18), isolating film (19), water conservancy diversion net (20) successively, arrange resin flows path Ω pipe (23) and resin ascending pipe (22);
In the 5th step, arrange vacuum-pumping pipeline: vacuumize volute and vacuum-pumping tube (27) along mould flange (28) edge stickup sealing joint strip (26), layout;
In the 6th step, constitute vacuum system: go up the whole one deck vacuum bag film (21) that covers at pressure side mould (8), sealing joint strip (26) and the pressure side mould (8) of vacuum bag film (21) by the mould flange periphery is bonding and consist of a closed system;
In the 7th step, connect vacuum-pumping tube: vacuum-pumping tube (27) is connected with vacuum system through the resin collecting tank;
In the 8th step, startup vacuumizes: degree of vacuum reaches-check that the vacuum system that vacuum bag film (21) and pressure side mould (8) are formed has not hole and gas leakage, searches mending-leakage behind the 0.1MPa;
In the 9th step, inject and mix the back resin: blending epoxy and curing agent, mix back resin, sized glass fibres fabric by resin ascending pipe (22) injection;
The tenth step, heating Procuring: water heater heats to 70 ℃ insulation 3 hours, the wind electricity blade pressure side housing that the Procuring moulding is finished;
The 11 step, bonding shear web: in the wind electricity blade pressure side housing that Procuring is finished, stick with glue the bonding blade master of agent shear web (12), trailing edge shear web (13); Water heater heats to 70 ℃ insulation 3 hours is carried out adhesive and is heating and curing;
In the 12 step, the suction surface mould is handled: brushing semipermanent releasing agent, mould flange (28) limit obliterating demoulding wax in the die face (25) of wind electricity blade suction surface mould (7);
In the 13 step, lay release cloth: after the wind electricity blade demoulding, need carry out laying release cloth (18) in the part mould profile (25) of post forming;
In the 14 step, lay glasscloth and structural core: go up and lay external layer glasscloth layer (24), structural foam core (10), form blade primary load bearing member at suction surface mould (7)---the glasscloth of crossbeam (11), blade root enhancement layer (1-3), inner enhancement layer (1-1) glasscloth of blade root and suction surface inner surface layer glasscloth (17);
The 15 step, laying vacuumizes auxiliary material: go up at the suction surface mould (7) of finishing operation described in the 14 step and lay release cloth (18), isolating film (19), water conservancy diversion net (20), arrange resin flows path Ω pipe (23) and resin ascending pipe (22);
In the 16 step, arrange vacuum-pumping pipeline: vacuumize volute and vacuum-pumping tube (27) along mould flange (28) edge stickup sealing joint strip (26), layout;
In the 17 step, constitute vacuum system: go up the whole one deck vacuum bag film (21) that covers at suction surface mould (7), sealing joint strip (26) and the suction surface mould (7) of vacuum bag film (21) by mould flange (28) edge is bonding and consist of a closed system;
In the 18 step, connect vacuum-pumping tube: vacuum-pumping tube (27) is connected with vacuum system through the resin collecting tank;
In the 19 step, startup vacuumizes: degree of vacuum reaches-check that the vacuum system that vacuum bag film (21) and suction surface mould (7) are formed has not hole and gas leakage, searches mending-leakage behind the 0.1MPa;
In the 20 step, inject and mix the back resin: blending epoxy and curing agent, mix back resin, sized glass fibres fabric by resin ascending pipe (22) injection;
The 21 step, heating Procuring: water heater heats to 70 ℃ insulation 3 hours, the wind electricity blade suction surface housing that the Procuring moulding is finished;
The 22 step, matched moulds:
A. spacer gel stick: in the blade pressure surface housing, load onto blade inlet edge angle of attachment (9) and trailing edge angle of attachment (14), at blade inlet edge (6) edge and trailing edge (3) edge, main shear web (12) and trailing edge shear web (13) go up the spacer gel stick;
B. the suction surface mould (7) that overturns is fastened on the blade suction surface housing on the blade pressure surface housing;
In the 23 step, solidify behind the wind electricity blade: water heater heats to 70 ℃ insulation 6 hours, carry out the back and solidify processing;
The 24 step, the demoulding: upset suction surface mould (7), solidify the wind electricity blade of finishing with the back and hang out in pressure side mould (8);
In the 25 step, the wind electricity blade blade root is outer to strengthen and back processing: twine the outside enhancement layer (1-2) of blade root in the outside of blade root (1), be heated to 70 ℃ of insulations 6 hours, carry out the back and solidify; The excision burr; The cutting blade root end is also processed T type bolt mounting holes;
The 26 step, the enhancing of wind electricity blade front and rear edge, surface treatment and annex are installed: flood mixed epoxy resin with two-layer twin shaft to glass fiber cloth, manual then front and back and the trailing edge that coats the enhancing wind electricity blade need strengthen part, is heated to 70 ℃ of insulations 6 hours, carries out the back and solidifies; Carry out the installation of surface treatment and annex.
4. a kind of wind turbine blade for large-scale wind generating set as claimed in claim 1 is characterized in that: the strict laying by the step of forming method described in the claim 3 in die face (25) such as the crossbeam of wind electricity blade (11), blade shell, blade root enhancement layer (1) and structure sandwich material (10) finished and partial pressure face and the disposable infiltration resin forming of suction surface in the vacuum perfusion process process.
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| CN2009101918575A CN101749194B (en) | 2009-12-11 | 2009-12-11 | Wind turbine blade for large-scale wind generating set, and molding method thereof |
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| CN2009101918575A CN101749194B (en) | 2009-12-11 | 2009-12-11 | Wind turbine blade for large-scale wind generating set, and molding method thereof |
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| CN101749194A CN101749194A (en) | 2010-06-23 |
| CN101749194B true CN101749194B (en) | 2011-09-14 |
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Assignee: Da'an Chenfei Wind Power Equipment Co Ltd Assignor: Chongqing General Industry (Group) Co., Ltd. Contract record no.: 2012220000021 Denomination of invention: Wind turbine blade for large-scale wind generating set, and molding method thereof Granted publication date: 20110914 License type: Exclusive License Open date: 20100623 Record date: 20120411 |