CN111873490A - Pre-buried strip, equipment and process for epoxy resin-based fiber-reinforced high-modulus wind power blade - Google Patents
Pre-buried strip, equipment and process for epoxy resin-based fiber-reinforced high-modulus wind power blade Download PDFInfo
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- CN111873490A CN111873490A CN202010807876.2A CN202010807876A CN111873490A CN 111873490 A CN111873490 A CN 111873490A CN 202010807876 A CN202010807876 A CN 202010807876A CN 111873490 A CN111873490 A CN 111873490A
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- glass fiber
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- felt
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- 239000003822 epoxy resin Substances 0.000 title claims abstract description 53
- 229920000647 polyepoxide Polymers 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title abstract description 16
- 230000008569 process Effects 0.000 title abstract description 10
- 239000003365 glass fiber Substances 0.000 claims abstract description 175
- 239000002131 composite material Substances 0.000 claims abstract description 56
- 239000004744 fabric Substances 0.000 claims abstract description 51
- 239000000835 fiber Substances 0.000 claims abstract description 48
- 238000004519 manufacturing process Methods 0.000 claims abstract description 24
- 239000003292 glue Substances 0.000 claims description 34
- 238000007598 dipping method Methods 0.000 claims description 18
- 239000012752 auxiliary agent Substances 0.000 claims description 17
- 239000003795 chemical substances by application Substances 0.000 claims description 17
- RAXXELZNTBOGNW-UHFFFAOYSA-N imidazole Natural products C1=CNC=N1 RAXXELZNTBOGNW-UHFFFAOYSA-N 0.000 claims description 12
- 238000005520 cutting process Methods 0.000 claims description 11
- 239000003963 antioxidant agent Substances 0.000 claims description 8
- 230000003078 antioxidant effect Effects 0.000 claims description 8
- 239000004611 light stabiliser Substances 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 6
- AHDSRXYHVZECER-UHFFFAOYSA-N 2,4,6-tris[(dimethylamino)methyl]phenol Chemical group CN(C)CC1=CC(CN(C)C)=C(O)C(CN(C)C)=C1 AHDSRXYHVZECER-UHFFFAOYSA-N 0.000 claims description 5
- MWSKJDNQKGCKPA-UHFFFAOYSA-N 6-methyl-3a,4,5,7a-tetrahydro-2-benzofuran-1,3-dione Chemical group C1CC(C)=CC2C(=O)OC(=O)C12 MWSKJDNQKGCKPA-UHFFFAOYSA-N 0.000 claims description 5
- 239000002250 absorbent Substances 0.000 claims description 5
- 230000002745 absorbent Effects 0.000 claims description 5
- 150000001875 compounds Chemical class 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 229920000728 polyester Polymers 0.000 claims description 5
- LTVUCOSIZFEASK-MPXCPUAZSA-N (3ar,4s,7r,7as)-3a-methyl-3a,4,7,7a-tetrahydro-4,7-methano-2-benzofuran-1,3-dione Chemical compound C([C@H]1C=C2)[C@H]2[C@H]2[C@]1(C)C(=O)OC2=O LTVUCOSIZFEASK-MPXCPUAZSA-N 0.000 claims description 4
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- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 3
- 229920006337 unsaturated polyester resin Polymers 0.000 description 3
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Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/50—Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC]
- B29C70/52—Pultrusion, i.e. forming and compressing by continuously pulling through a die
- B29C70/521—Pultrusion, i.e. forming and compressing by continuously pulling through a die and impregnating the reinforcement before the die
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/50—Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC]
- B29C70/52—Pultrusion, i.e. forming and compressing by continuously pulling through a die
- B29C70/525—Component parts, details or accessories; Auxiliary operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
- B29C70/545—Perforating, cutting or machining during or after moulding
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/04—Reinforcing macromolecular compounds with loose or coherent fibrous material
- C08J5/0405—Reinforcing macromolecular compounds with loose or coherent fibrous material with inorganic fibres
- C08J5/043—Reinforcing macromolecular compounds with loose or coherent fibrous material with inorganic fibres with glass fibres
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
- C08K13/04—Ingredients characterised by their shape and organic or inorganic ingredients
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/02—Fibres or whiskers
- C08K7/04—Fibres or whiskers inorganic
- C08K7/14—Glass
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor
- F03D1/06—Rotors
- F03D1/065—Rotors characterised by their construction elements
- F03D1/0675—Rotors characterised by their construction elements of the 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2363/00—Characterised by the use of epoxy resins; Derivatives of epoxy resins
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Composite Materials (AREA)
- Manufacturing & Machinery (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Wind Motors (AREA)
- Moulding By Coating Moulds (AREA)
- Reinforced Plastic Materials (AREA)
Abstract
The invention discloses a pre-buried strip, equipment and a process for an epoxy resin-based fiber-reinforced high-modulus wind power blade, wherein the pre-buried strip comprises the following components: the composite material comprises a composite material body and composite surfacing felts, wherein the composite surfacing felts are arranged on the upper surface and the lower surface of the composite material body; the composite material body is a glass fiber reinforced epoxy resin composite material; the glass fiber comprises twistless roving glass fiber, bulked yarn glass fiber and glass fiber cloth, the twistless roving glass fiber and the bulked yarn glass fiber are uniformly arranged in the composite material body along the length direction in a multi-layer mode to form a multi-layer structure, and at least one layer of the glass fiber cloth is arranged in the multi-layer structure along the length direction. The embedded strip is a high-modulus embedded strip reinforced by epoxy resin-based fibers, has the advantages of high modulus, certain toughness and ageing resistance, and can meet the requirements of the production of unit blades below 7MW at present.
Description
Technical Field
The invention belongs to the field of wind power generation, and particularly relates to an epoxy fiber reinforced high-modulus high-toughness embedded strip for a wind power blade, equipment and a process.
Background
The wind generating set is a generating set composed of blades, a transmission system, a generator, an electricity storage device, a tower frame, an electrical appliance system and the like, and the key point of the wind generating set is to have the blades capable of rotating lightly and quickly to obtain larger wind power generation power, so that the wind generator blade technology is the core technology of the wind generating set.
The blade is required to have a reasonable structure because the blade directly faces the wind to obtain wind energy, and the blade is made of high-quality materials and advanced technology to reliably bear wind power, and the blade has the advantages of high structural strength, fatigue resistance, high temperature resistance, reliability in operation, easiness in manufacturing, and the manufacturing cost and the use cost are all factors to be considered.
An important sign of the development of the wind power technology is the increase of the capacity of a single machine, the power generation cost can be reduced by about 15% when the capacity of the single machine is doubled, and the power generation capacity of the single machine is continuously improved in all countries in the world which develop wind power generation. With the improvement of fan blade design technology, wind power generation has self-high power, the directional development of long blades and the increase of the size of the blades can improve the economy of wind power generation and reduce the power generation cost, the length of the blades is developed from 4.5 meters in 1980 to 90 meters today, the capacity is developed from 55KW at first to 10MW today, and materials are also developed from wood, metal and composite materials today. The smaller blade is smaller than 22 m, E or ECR glass fiber reinforced plastic is selected, and unsaturated polyester resin is selected as the resin base. The blade material can also be produced by using vinyl resin and epoxy resin, the larger blade is more than 42 meters, E or ECR glass fiber and epoxy resin matrix and carbon fiber and epoxy resin matrix reinforced plastic are generally adopted, the cost of the carbon fiber is close to ten times of that of the epoxy resin, the performance is the highest, but the cost performance is poor, the glass fiber reinforced plastic and the epoxy resin matrix are basically adopted to produce the blade material at present, and therefore the strength of the blade is increased along with the increase of the length of the blade.
The wind driven generator blade is a thin shell structure made of fiber reinforced composite materials and comprises a root shell and a main beam, wherein the root of the blade is a key part for connecting the blade and a rotor hub of a wind turbine and bears complex shearing, extruding and bending-twisting combined action. Therefore, blade root connection must have enough mechanical strength and bending rigidity, the connection of blade bolts and blade roots is realized by a method of pre-embedding and connecting blade root bolt sleeves, and the pre-embedding strips improve the strength and stability of the blade by pre-embedding the blade root, ensure the reliable connection of the blade bolts and a rotor hub and the safe operation of the blade.
The unsaturated polyester resin and the glass fiber are reinforced, so that the manufacturing cost is low, but the strength cannot meet the requirement of the strength of a large-size blade. The carbon fiber has high strength and light weight, and is the direction of the design and development of the rear blade, but the price of the carbon fiber is too high, the production cost of the blade is too high, and the blade cannot be commercialized in large batch.
Disclosure of Invention
In order to overcome the technical problem that the strength of an unsaturated polyester resin product cannot meet the strength of a large-size blade, the invention aims to provide the embedded strip, equipment and process for the epoxy resin-based fiber-reinforced high-modulus wind power blade, wherein the embedded strip for the wind power blade is the epoxy resin-based fiber-reinforced high-modulus embedded strip, and the embedded strip manufactured by the method has the advantages of high modulus, certain toughness and ageing resistance, and can meet the production requirement of the blades of the generator set below 7MW at present.
In order to achieve the purpose, the invention adopts the following technical means:
an epoxy-resin-based fiber-reinforced high-modulus embedded strip for a wind power blade comprises:
the composite material comprises a composite material body and composite surfacing felts, wherein the composite surfacing felts are arranged on the upper surface and the lower surface of the composite material body; the composite material body is a glass fiber reinforced epoxy resin composite material;
the glass fiber comprises glass fiber roving, glass fiber bulk yarn and glass fiber cloth, wherein the glass fiber roving and the glass fiber bulk yarn are uniformly arranged in the composite material body along the length direction, and at least one layer of glass fiber cloth is arranged in the composite material body along the length direction.
As a further improvement of the invention, the composite material body comprises the following components in percentage by mass:
glass fiber: 70% -78%;
epoxy resin: 11.5% -18%;
curing agent: 8.5% -13%;
accelerator (b): 0.5% -0.65%;
other auxiliary agents: 0.08% -0.12%;
as a further improvement of the invention, the curing agent is methyl tetrahydrophthalic anhydride or methyl nadic anhydride;
the accelerant is DMP30 or imidazole;
the other auxiliary agents are one or more of ultraviolet absorbent, antioxidant and light stabilizer.
As a further improvement of the invention, the glass fibers comprise, in mass percent:
roving glass fiber without twist: 70-80%;
bulk yarn glass fiber: 20% -25%;
glass fiber cloth: 5 to 10 percent.
As a further improvement of the invention, the glass fiber cloth is a fiber cloth formed by stitching and knitting multiaxial fibers; the composite surface felt is obtained by compounding glass fiber cloth and polyester surface felt.
The manufacturing equipment of the embedded strip for the epoxy resin-based fiber-reinforced high-modulus wind power blade comprises a creel, a yarn guide frame, a first placing frame, a first yarn guide felt guide plate, a glue dipping groove, a second yarn guide felt guide plate, a second placing frame, a mold, a traction device and a cutting machine which are sequentially arranged;
the creel is used for placing yarn balls of the twistless roving glass fiber and the bulked glass fiber; the first placing frame is used for placing glass fiber cloth; filling glue solution in the glue dipping tank;
a second placing rack is respectively arranged above and below the second yarn guide felt plate and used for placing the composite surface felt;
when the device works, the yarn head of the yarn group enters a glue dipping tank together with glass fiber cloth through a yarn guide frame through a first yarn guide felt plate, and enters a mould together with an upper composite surface felt and a lower composite surface felt after passing through a second yarn guide felt plate; and drawing the die to a cutting machine by a drawing device after the die is discharged.
As a further improvement of the invention, each row of the creel is provided with the yarn threading plates, and yarn ends of the yarn groups sequentially penetrate through each yarn threading plate and are correspondingly and uniformly distributed on the yarn guide frame according to the number of layers.
As a further improvement of the invention, the shape of the end surface of the second yarn guide felt plate is consistent with the shape of the tangent plane of the embedded part and is amplified in equal proportion;
two first racks are arranged between the yarn guide frame and the first yarn guide felt guide plate.
As a further improvement of the invention, the glue solution is composed of epoxy resin, a curing agent, an accelerator and other auxiliary agents.
The production process of the embedded strip manufacturing equipment for the epoxy resin-based fiber-reinforced high-modulus wind power blade comprises the following steps:
putting yarn groups of the twistless roving glass fibers and the bulked glass fibers on the creel according to the glass fiber quantity, wherein yarn heads of the yarn groups correspondingly and uniformly penetrate through the yarn guide frame according to the number of layers and enter the first yarn guide felt plate;
the glass fiber cloth placed on the first placing rack is distributed in glass fiber roving glass fibers and glass fiber bulked yarns through a first yarn guiding felt plate to form a multi-layer structure;
the multilayer structure enters a glue dipping tank for glue dipping; after gum dipping, the mixture enters a second yarn guiding felt plate for preforming;
the two composite surface felts are arranged on the upper surface and the lower surface of the compound layer structure which is soaked with glue and enter a mould together for heating and curing to form a strip-shaped embedded part;
and the strip-shaped embedded part is pulled and extruded by a traction device and cut by a cutting machine to obtain a single embedded strip.
Compared with the prior art, the invention has the following advantages:
the main body of the embedded strip for the wind power blade is reinforced by epoxy resin-based fibers, the embedded part is added with bulked yarns in the production process, the bulked yarns are glass fibers which are subjected to special treatment, the yarn body is fluffy, a plurality of epoxy resins can enter the product, enough epoxy resins can ensure that the interface of the glass fibers and the epoxy resins is reliably bonded, and the addition of the glass fiber multiaxial cloth (felt) ensures that the stress strength of the product in multiple directions is increased, so that the strength of the wind power blade is improved.
Furthermore, the ultraviolet resistance and the aging resistance of the product can be improved and the service life of the product can be prolonged by adding auxiliary agents such as an ultraviolet resistance agent, an antioxidant, a light stabilizer and the like into the epoxy resin glue solution.
Furthermore, the invention adds the bulked yarn, the multi-axial glass fiber composite felt and the high-performance epoxy resin, and adds the auxiliary agents such as an antioxidant, an ultraviolet-resistant agent, a light stabilizer and the like into the resin matrix. Can better improve the mechanical property and the ageing resistance of the product.
Further, because add varicosity yarn and glass fiber multiaxial cloth in the in-process, the in-process produces glass fiber, and the preforming that increases is led the yarn and is led the felt-board before glass fiber multiaxial cloth advances the mould, has guaranteed glass fiber, and the varicosity yarn, smooth entering mould of glass fiber multiaxial felt forms network structure in the goods, improves goods bulk strength.
The glass fiber in the equipment disclosed by the invention is combined by selecting the common pultruded glass fiber and the bulked glass fiber, so that the requirement of high modulus of the wind power blade can be met, and the requirement of the embedded strip product for the wind power blade on the proportion of each component can be met; the bulk yarn glass fiber has the characteristics of large volume, strong adsorption capacity and the like, the use amount of the glass fiber of the twistless roving can be reduced by increasing the use amount of the bulk yarn glass fiber, more glue solution can be brought into a die cavity by using the strong adsorption capacity of the bulk yarn glass fiber, and the content ratio and the volume ratio of resin and fiber in an embedded part product are improved. The content ratio of the glass fiber and the resin can be better controlled, and the toughness of the product can be improved after the resin content is improved. Meanwhile, the weight of the embedded part can be reduced, and the quality control of the next working procedure of the product is facilitated. The use of the glass fiber cloth (felt) can improve the comprehensive strength of the embedded part, particularly the transverse strength.
Furthermore, through the uniform arrangement and the multilayer design of various glass fiber products, different glass fibers are uniformly distributed according to the pre-designed positions through each yarn guide frame and the pre-formed plate in front of the die. And (4) preparing flow guide in front of the multilayer design. The pre-formed plate in front of the die is smoothly, orderly and uniformly distributed into the die, and is heated, cured and formed, so that the high-modulus and high-toughness performance requirements of the comprehensive strength requirements of the embedded part product are met.
Furthermore, the anti-aging capacity of the product can be further improved by adding the composite surfacing mat, the thickness of the resin layer on the surface of the product can be increased by adding the composite surfacing mat, a protective film with a layer thickness is formed on the surface of the product, the polyester surfacing mat has a good anti-aging function, and the excellent anti-aging capacity of the product is further improved by the cooperation of various auxiliaries.
The preparation process of the invention adopts pultrusion of high-quality epoxy resin, curing agent and glass fiber. The glass fiber is placed on the creel and orderly arranged to sequentially pass through the yarn guides, so that the uniform tension of the glass fiber is ensured. The embedded strip for the wind power blade has the advantages of more uniform component distribution and more reasonable cost control, such as transverse tensile strength, impact strength, ageing resistance, high toughness and high modulus.
Drawings
FIG. 1 is a schematic view of a manufacturing apparatus of the pre-buried strip for the wind turbine blade of the present invention.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, shall fall within the scope of protection of the present invention.
As shown in fig. 1, the invention provides equipment for manufacturing an embedded strip for an epoxy resin-based fiber-reinforced high-modulus wind power blade, which comprises a creel 1, a yarn guide creel 2, a first placing frame 3, a first yarn guide felt guide plate 4, a glue dipping tank 5, a second yarn guide felt guide plate 6, a second placing frame 7, a mold 8, a traction device 9 and a cutting machine 10 which are sequentially arranged;
the creel 1 is used for placing yarn groups of the twistless roving glass fiber and the bulked glass fiber; the first placing frame 3 is used for placing glass fiber cloth; the glue solution is filled in the glue dipping tank 5;
a second placing rack 7 is respectively arranged above and below the second yarn guiding felt plate 6, and the second placing rack 7 is used for placing the composite surface felt; and each row of the creel 1 is provided with a yarn threading plate, and yarn heads of the yarn groups sequentially penetrate through each yarn threading plate and are correspondingly and uniformly distributed on the yarn guide frame 2 according to the number of layers.
The end surface shape of the second yarn guide felt plate 6 is consistent with the section shape of the embedded part and is amplified in equal proportion; two first racks 3 are arranged between the creel 2 and the first yarn guiding mat 4. The glue solution consists of epoxy resin, a curing agent, an accelerant and other auxiliary agents.
When the device works, the yarn head of the yarn group passes through the yarn guide frame 2, enters the glue dipping tank 5 together with the glass fiber cloth through the first yarn guide felt plate 4, and enters the die 8 together with the upper and lower composite surface felts after passing through the second yarn guide felt plate 6; after exiting the die 8, the die is drawn by a drawing device 9 to a cutter 10.
Two kinds of glass fiber on the creel 1 carry out reasonable arrangement according to the batching ratio for two kinds of glass fiber that get into the creel 2 distribute evenly and satisfy the requirement of mass ratio on the single cross section.
As a preferred embodiment, each row of the creel 1 is provided with a threading plate, and yarn ends of the yarn groups sequentially penetrate through each threading plate and are correspondingly and uniformly distributed on the yarn guide frame 2 according to the number of layers.
In a preferred embodiment, one or more first racks 3 are provided, and glass fiber cloth enters the first yarn guiding felt plate 4 in one or more rows.
As a preferred embodiment, the shape of the end surface of the second yarn guide felt plate 6 is consistent with the shape of the tangent plane of the embedded part and is enlarged in equal proportion.
As a preferred embodiment, two first racks 3 are arranged between the creel 2 and the first yarn guiding mat 4.
The invention also provides a production process of the manufacturing equipment of the embedded strip for the epoxy resin-based fiber-reinforced high-modulus wind power blade, which comprises the following steps:
putting a yarn group of the twistless roving glass fiber and the bulked glass fiber on the creel 1 according to the glass fiber quantity, and uniformly penetrating yarn heads of the yarn group through the yarn guide frame 2 according to the number of layers and entering a first yarn guide felt plate 4;
the glass fiber cloth placed on the first placing rack 3 is distributed in glass fiber roving glass fiber and glass fiber bulked yarn through a first yarn guiding felt plate 4 to form a multi-layer structure;
the multilayer structure enters a glue dipping tank 5 for glue dipping; after gum dipping, the mixture enters a second yarn guiding felt plate 6 for preforming;
the two composite surface felts are arranged on the upper surface and the lower surface of the compound layer structure which is soaked with glue and enter the mould 8 together for heating and curing to form a strip-shaped embedded part;
the strip-shaped embedded part is pulled and extruded by a traction device 9 and cut by a cutting machine 10 to obtain a single embedded strip.
The specific process is as follows:
before production, the amount of used glass fibers is calculated, the glass fibers are uniformly distributed according to the proportion of 20% -30% and 80% -70%, the glass fibers are divided into roving glass fibers and bulk glass fibers, the roving glass fibers and the bulk glass fibers are loaded onto a creel 1, yarns on the creel 1 must be placed in order, transversely are arranged in a row, longitudinally are arranged in a row, a corresponding yarn threading plate is arranged above each row of yarns, a yarn group must be placed under the middle of the yarn threading plate and cannot deviate from a central point, then the yarn end of the yarn group is taken out and sequentially penetrates through each yarn threading plate, and the conditions of mutual crossing, winding, plate skipping and the like cannot be realized.
Creel 1 has preceding creel 2 to the orderly guide creel 2 that passes of yarn on every layer, corresponds evenly to arrange on creel 2 according to the number of piles, and 2 creels of creel have first leading yarn in front and lead felt-board 4, and 2 creels of creel and first leading yarn lead felt-board 4 between have the first rack 3 of glass fiber cloth, and glass fiber cloth leads felt-board 4 through first leading yarn, divides two-layer evenly distributed between glass fiber twistless roving glass fiber and glass fiber bulked yarn. The front of the first yarn guiding felt plate 4 is provided with a glue soaking box (groove) 5, the front of the glue soaking box (groove) 5 is provided with a preformed second yarn guiding felt plate 6, the shape of the second yarn guiding felt plate 6 is the same as the section shape of an embedded part product, the size is enlarged to a certain extent, the uniform distribution and definite level of glass fibers are ensured, the glass fibers and glass fiber cloth (felt) sequentially penetrate through the creel 1, the creel 2, the first yarn guiding felt plate 4 and the glue soaking box (groove) 5, the second yarn guiding felt plate 6 enters the mold 8, all the glass fibers are pulled out of the mold 8 through the traction device 9, the mold 8 is heated, and the temperature is heated to the preset temperature. There are two upper and lower compound surfacing felt second racks 7 at the 8 entrance of mould, and with two upper and lower compound surfacing felt and the glass fiber who soaks gluey together get into mould 8 and pull out mould 8, draw gear 9 will install additional the fixture device the same with built-in fitting tangent plane shape, guarantee not skid in the production process, do not stop, the product of producing is indeformable, the distortion. A cutting machine 10 is arranged in front of the traction device 9 and used for cutting according to the required size.
Further, a plurality of heating sections are arranged on the die 8 along the advancing direction of the yarn end.
The mould 8 adopts a sectional heating mode, wherein the temperatures of the A/B/C sections are respectively as follows: the temperature of the area A is 100-150 ℃; the temperature of the B area is 150-175 ℃; and the C area is 160-180 ℃.
Heating the mould 8 to a preset temperature, preparing the glue according to a designed proportion in advance for standby use, pouring the prepared glue into the glue soaking box (groove) 5, starting up the production, adjusting the pultrusion speed to the range of technological requirements, smoothly passing the product through the traction device 9, sawing off the waste head with poor front soaking, observing whether the end face and the outer surface of the product have cracks, and measuring whether the size of the product meets the requirements.
Wherein the glue solution is a premix consisting of epoxy resin, a curing agent, an accelerator and other auxiliaries.
Preferably, the two traction devices 9 are provided, the two traction devices 9 are arranged at intervals, and the yarn end sequentially passes through the two traction devices 9 and then enters the cutting machine 10.
Furthermore, the traction speed is 8-15 cm/min.
The pre-buried strip for the epoxy resin-based fiber-reinforced high-modulus wind power blade, which is prepared by the invention, comprises the following components in structure:
the composite material comprises a composite material body and composite surfacing felts, wherein the composite surfacing felts are arranged on the upper surface and the lower surface of the composite material body; the composite material body is a glass fiber reinforced epoxy resin composite material;
the glass fiber comprises glass fiber roving, glass fiber bulk yarn and glass fiber cloth, wherein the glass fiber roving and the glass fiber bulk yarn are uniformly arranged in the composite material body along the length direction, and at least one layer of glass fiber cloth is arranged in the composite material body along the length direction.
The embedded part comprises the following chemical components in chemical composition: glass fiber, epoxy resin, curing agent, accelerator and other auxiliary agents. The embedded part comprises the following chemical components in percentage by weight:
glass fiber: 70% -78%;
epoxy resin: 11.5% -18%;
curing agent: 8.5% -13%;
accelerator (b): 0.5% -0.65%;
other auxiliary agents: 0.08 to 0.12 percent.
The glass fiber refers to: e or ECR glass fibers, the glass fibers comprising: roving glass fiber, bulk glass fiber and glass fiber cloth or cloth.
The glass fiber of the twistless roving is special glass fiber for pultrusion, and the bulked glass fiber is fiber processed by a special process, and has the special functions of large volume, strong adsorption capacity, improvement of uniform distribution of materials at dead corners of products and the like. The proportion of glass fiber and resin in the product and the uniform degree of distribution can be effectively controlled, the stability of the product is ensured, and the use proportion of the bulk glass fiber and the glass fiber of the twistless roving is as follows:
the expanded glass fiber accounts for 20-30% of the total fiber amount;
the glass fiber of the twistless roving accounts for 80 to 70 percent of the total fiber amount;
the glass fiber cloth accounts for 5-10% of the total fiber amount.
Wherein, the glass fiber cloth (felt) is a fiber cloth (felt) formed by stitching and knitting multi-axial fibers. Specifically, the fiber has multi-directional fiber, transverse fiber, longitudinal fiber and oblique angle 45 degree fiber. The comprehensive strength of the product can be greatly improved in the product, because the pultrusion process is mostly longitudinal fibers, the longitudinal tensile strength is very high, but the transverse strength is relatively low, the problem that the multi-axial fiber cloth (felt) can be greatly improved is solved, because the multi-axial fiber cloth (felt) has fibers in multiple directions, the transverse fiber quantity in the product can be effectively improved, and the multi-axial fiber cloth (felt) and the longitudinal fibers form a net shape, so that the transverse strength and the comprehensive strength of the product are greatly improved.
The composite surface felt is a felt formed by compounding a fiber felt and a polyester surface felt, and mainly has the functions of improving the thickness of a resin layer on the surface of a product, increasing the surface brightness of the product and improving the ageing resistance of the product.
The epoxy resin refers to: the high-performance and high-toughness epoxy resin can greatly improve the toughness of the product, and the product made of the common epoxy resin has high strength, strong rigidity but large brittleness and poor toughness. The high-performance high-toughness epoxy resin can ensure high strength and high rigidity of a product, can also ensure high toughness of the product, and improves the shock resistance and the temperature change resistance and cracking resistance of the product.
The curing agent is as follows: methyl tetrahydrophthalic anhydride or methyl nadic anhydride.
The accelerant is as follows: DMP30 or imidazole.
The other auxiliary agents are: ultraviolet absorbent, antioxidant, light stabilizer and other assistants.
The embedded part manufactured by adopting the components can strictly control the proportional quantity of each component in the embedded part, particularly the proportional quantity of resin and glass fiber and the distribution uniformity of each component, and improve the toughness, the product quality stability, the impact resistance and the aging resistance of the embedded part.
The invention selects different types and high-performance chemical composition components, uniformly distributes the components in the embedded part product, roughly controls the proportion content of the components, strictly controls the technological index parameters, and leads the components to produce the high-modulus high-toughness glass fiber reinforced embedded part through a forming die.
The invention is described in detail below with reference to specific sets of general examples.
Example 1
The embedded part comprises the following chemical components in percentage by weight:
glass fiber: 78 percent of
Epoxy resin: 12.92 percent
Curing agent: 8.5 percent; methyl tetrahydrophthalic anhydride;
accelerator (b): 0.5%, imidazole;
other auxiliary agents: 0.08 percent of organic solvent, such as ultraviolet absorbent, antioxidant and light stabilizer additive.
The glass fiber adopts E glass fiber, and the glass fiber comprises: roving glass fiber, bulk glass fiber and glass fiber cloth or cloth. In the glass fiber, the use ratio is as follows:
the expanded glass fiber accounts for 20% of the total fiber amount;
the glass fiber of the twistless roving accounts for 70 percent of the total fiber amount.
The glass fiber cloth accounts for 10 percent of the total fiber amount.
Example 2
The embedded part comprises the following chemical components in percentage by weight:
glass fiber: 74.3 percent
Epoxy resin: 15 percent of
Curing agent: 10% methyl nadic anhydride;
accelerator (b): 0.6%, DMP 30;
other auxiliary agents: 0.1% of water, such as ultraviolet absorbent and antioxidant.
The glass fiber adopts ECR glass fiber, and comprises: roving glass fiber, bulk glass fiber and glass fiber cloth or cloth. The use ratio is as follows:
the expanded glass fiber accounts for 20-30% of the total fiber amount;
the glass fiber of the twistless roving accounts for 80-70% of the total fiber.
The glass fiber cloth accounts for 5-10% of the total fiber amount.
Example 3
The embedded part comprises the following chemical components in percentage by weight:
glass fiber: 70 percent of
Epoxy resin: 18 percent of
Curing agent: 11.23%, methyl tetrahydrophthalic anhydride;
accelerator (b): 0.65%, DMP 30;
other auxiliary agents: 0.12% by weight, such as an ultraviolet absorber.
The glass fiber adopts E ECR glass fiber, and comprises: roving glass fiber, bulk glass fiber and glass fiber cloth or cloth. The use ratio is as follows:
the expanded glass fiber accounts for 20-30% of the total fiber amount;
the glass fiber of the twistless roving accounts for 80-70% of the total fiber.
The glass fiber cloth accounts for 5-10% of the total fiber amount.
The above are several groups of common formulas of the invention, and other formulas can also be adopted to realize the function of improving the material performance.
The epoxy resin-based fiber reinforced high-modulus embedded strip for the wind power blade, which is produced by the formula design and the process design, has excellent performances of high modulus, high toughness, ageing resistance, impact resistance and the like. Table 1 shows the mechanical property test of the pre-embedded bar for the epoxy resin-based fiber-reinforced high-modulus wind turbine blade prepared in the present invention, specifically, the chemical ratio of example 2 is adopted.
TABLE 1
| Item | Unsaturated system | Epoxy system |
| Tensile strength | 406MPa | 856MPa |
| Compressive strength | 169MPa | 682MPa |
| Bending strength | 533MPa | 824MPa |
The epoxy resin-based fiber-reinforced high-modulus embedded strip for the wind turbine blade is excellent in mechanical property, meets the advantage of high modulus, and can meet the production requirement of the current generator set blade below 7 MW.
In summary, the invention is characterized in that:
1. high-quality raw materials, particularly resin matrix, glass fiber and the like are selected to improve the high modulus, high toughness, aging resistance and impact resistance of the product. The resin is high-tenacity resin, the resin has high modulus and high tenacity, so that the modulus and tenacity of the produced pre-buried strip for the epoxy resin-based fiber reinforced high-modulus wind power blade are high, and the technical requirements of the product are met; the bulk yarn glass fiber has the characteristics of large volume, strong adsorption capacity and the like, the use amount of the glass fiber of the twistless roving can be reduced by increasing the use amount of the bulk yarn glass fiber, more glue solution can be brought into a die cavity by using the strong adsorption capacity of the bulk yarn glass fiber, and the content ratio and the volume ratio of resin and fiber in an embedded part product are improved. The content ratio of the glass fiber and the resin can be better controlled, and the toughness of the product can be improved after the resin content is improved. Meanwhile, the weight of the embedded part can be reduced, and the quality control of the next working procedure of the product is facilitated. The use of the glass fiber cloth (felt) can improve the comprehensive strength of the embedded part, particularly the transverse strength.
2. Through the even arrangement and the multilayer design of various glass fiber products, different glass fibers are evenly distributed according to the pre-designed positions through each yarn guide frame and the pre-formed plate in front of the die. And (4) preparing flow guide in front of the multilayer design.
The pre-formed plate in front of the die is smoothly, orderly and uniformly distributed into the die, and is heated, cured and formed, so that the high-modulus and high-toughness performance requirements of the comprehensive strength requirements of the embedded part product are met.
3. By adding the auxiliary agents such as the ultraviolet absorber, the light stabilizer, the antioxidant and the like, the anti-aging performance of the epoxy resin-based fiber-reinforced high-modulus embedded strip for the wind power blade is improved, and the service life of the embedded strip is prolonged. The anti-aging capacity of the product can be further improved by adding the composite surfacing felt, the thickness of the resin layer on the surface of the product can be increased by adding the composite surfacing felt, a protective film with a layer thickness is formed on the surface of the product, the polyester surfacing felt has a good anti-aging function, and the excellent anti-aging capacity of the product is improved by the mutual matching of various auxiliaries.
In conclusion, the invention selects advanced raw materials preferably, and adopts advanced multi-layer design concept and addition of related auxiliary agents, and ensures the quality stability, high strength requirement, impact resistance and ageing resistance of the product from each link of controlling the proportion amount, the distribution uniformity degree and the resin content of each component, strictly controlling the formula design and the process and the like to final forming, so that the economic benefit cost control of the product is well ensured.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
It is to be understood that the above description is intended to be illustrative, and not restrictive. Many embodiments and many applications other than the examples provided would be apparent to those of skill in the art upon reading the above description. The scope of the present teachings should, therefore, be determined not with reference to the above description, but should instead be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. The disclosures of all articles and references, including patent applications and publications, are hereby incorporated by reference for all purposes. The omission in the foregoing claims of any aspect of subject matter that is disclosed herein is not intended to forego such subject matter, nor should the applicant consider that such subject matter is not considered part of the disclosed subject matter.
Claims (10)
1. The utility model provides an epoxy base fibre reinforcing high modulus wind-powered electricity generation is pre-buried strip for blade which characterized in that includes:
the composite material comprises a composite material body and composite surfacing felts, wherein the composite surfacing felts are arranged on the upper surface and the lower surface of the composite material body; the composite material body is a glass fiber reinforced epoxy resin composite material;
the glass fiber comprises glass fiber roving, glass fiber bulk yarn and glass fiber cloth, wherein the glass fiber roving and the glass fiber bulk yarn are uniformly arranged in the composite material body along the length direction, and at least one layer of glass fiber cloth is arranged in the composite material body along the length direction.
2. The epoxy resin based fiber reinforced high modulus embedded strip for wind power blade according to claim 1, wherein the composite material comprises the following components in percentage by mass:
glass fiber: 70% -78%;
epoxy resin: 11.5% -18%;
curing agent: 8.5% -13%;
accelerator (b): 0.5% -0.65%;
other auxiliary agents: 0.08 to 0.12 percent.
3. The embedded strip for the epoxy resin-based fiber-reinforced high-modulus wind power blade as claimed in claim 2,
the curing agent is methyl tetrahydrophthalic anhydride or methyl nadic anhydride;
the accelerant is DMP30 or imidazole;
the other auxiliary agents are one or more of ultraviolet absorbent, antioxidant and light stabilizer.
4. The embedded strip for the epoxy resin-based fiber-reinforced high-modulus wind power blade according to claim 1, wherein the glass fiber comprises the following components in percentage by mass:
roving glass fiber without twist: 70-80%;
bulk yarn glass fiber: 20% -25%;
glass fiber cloth: 5 to 10 percent.
5. The embedded strip for the epoxy resin-based fiber-reinforced high-modulus wind power blade according to claim 1, wherein the glass fiber cloth is fiber cloth formed by stitching and knitting multi-axial fibers; the composite surface felt is obtained by compounding glass fiber cloth and polyester surface felt.
6. The manufacturing equipment of the embedded strip for the epoxy resin-based fiber-reinforced high-modulus wind power blade is characterized by comprising a creel (1), a yarn guide frame (2), a first placing frame (3), a first yarn guide felt guide plate (4), a glue dipping groove (5), a second yarn guide felt guide plate (6), a second placing frame (7), a mold (8), a traction device (9) and a cutting machine (10) which are sequentially arranged;
the creel (1) is used for placing yarn groups of the glass fiber of the twistless roving and the bulked glass fiber; the first placing rack (3) is used for placing glass fiber cloth; the glue solution is filled in the glue dipping tank (5);
a second placing rack (7) is respectively arranged above and below the second yarn guide felt plate (6), and the second placing rack (7) is used for placing the composite surface felt;
when the device works, the yarn end of the yarn group passes through the yarn guide frame (2), enters the glue dipping tank (5) together with the glass fiber cloth through the first yarn guide felt plate (4), passes through the second yarn guide felt plate (6), and then enters the die (8) together with the upper and lower composite surface felts; after the die (8) is taken out, the die is drawn to a cutting machine (10) by a drawing device (9).
7. The manufacturing equipment according to claim 6, characterized in that the creel (1) is provided with threading plates in each row, and the yarn ends of the yarn groups sequentially penetrate through each threading plate and are correspondingly and uniformly arranged on the yarn guide frame (2) according to the number of layers.
8. The manufacturing apparatus according to claim 6,
the end surface shape of the second yarn guiding felt plate (6) is consistent with the section shape of the embedded part and is amplified in equal proportion;
two first racks (3) are arranged between the yarn guide (2) and the first yarn guiding felt plate (4).
9. The manufacturing equipment as claimed in claim 6, wherein the glue solution is composed of epoxy resin, curing agent, accelerator and other auxiliary agents.
10. Production process of a manufacturing apparatus according to any of claims 6 to 9, characterized by comprising the following steps:
putting a yarn group of the twistless roving glass fiber and the bulked glass fiber on a creel (1) according to the glass fiber quantity, and uniformly penetrating yarn heads of the yarn group through a yarn guide frame (2) according to the number of layers and entering a first yarn guide felt plate (4);
the glass fiber cloth placed on the first placing rack (3) is distributed in glass fiber roving glass fiber and glass fiber bulked yarn through a first yarn guiding felt plate (4) to form a multi-layer structure;
the multilayer structure enters a glue dipping tank (5) for glue dipping; after gum dipping, the mixture enters a second yarn guiding felt plate (6) for preforming;
the two composite surface felts are arranged on the upper surface and the lower surface of the compound layer structure which is soaked with glue and enter a mould (8) together for heating and curing to form a strip-shaped embedded part;
the strip-shaped embedded part is pulled and extruded by a traction device (9) and cut by a cutting machine (10) to obtain a single embedded strip.
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| CN202010807876.2A CN111873490A (en) | 2020-08-12 | 2020-08-12 | Pre-buried strip, equipment and process for epoxy resin-based fiber-reinforced high-modulus wind power blade |
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| CN112940454A (en) * | 2021-02-19 | 2021-06-11 | 陕西泰普瑞电工技术有限公司 | High-temperature-resistant high-voltage partial discharge-free epoxy resin insulating material and preparation method thereof |
| CN113400687A (en) * | 2021-06-25 | 2021-09-17 | 四川东树新材料有限公司 | Method for continuously producing pultruded epoxy glass fiber board for ultra-long time |
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| CN115782255A (en) * | 2022-11-12 | 2023-03-14 | 江苏亨博复合材料有限公司 | Continuous production line for sandwich type thermoplastic prepreg and production method thereof |
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