CN113374628A - Lightweight main beam for wind power blade, main beam manufacturing method, wind power blade and manufacturing method thereof - Google Patents
Lightweight main beam for wind power blade, main beam manufacturing method, wind power blade and manufacturing method thereof Download PDFInfo
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- CN113374628A CN113374628A CN202110615432.3A CN202110615432A CN113374628A CN 113374628 A CN113374628 A CN 113374628A CN 202110615432 A CN202110615432 A CN 202110615432A CN 113374628 A CN113374628 A CN 113374628A
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Images
Classifications
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- 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
- F03D1/0608—Rotors characterised by their aerodynamic shape
- F03D1/0633—Rotors characterised by their aerodynamic shape of the blades
-
- 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
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
-
- 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
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
- B29C65/7802—Positioning the parts to be joined, e.g. aligning, indexing or centring
- B29C65/7805—Positioning the parts to be joined, e.g. aligning, indexing or centring the parts to be joined comprising positioning features
- B29C65/7808—Positioning the parts to be joined, e.g. aligning, indexing or centring the parts to be joined comprising positioning features in the form of holes or slots
- B29C65/7811—Positioning the parts to be joined, e.g. aligning, indexing or centring the parts to be joined comprising positioning features in the form of holes or slots for centring purposes
-
- 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
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
- B29C70/34—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation
- B29C70/342—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation using isostatic pressure
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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
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
-
- 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
- F03D1/0608—Rotors characterised by their aerodynamic shape
- F03D1/0633—Rotors characterised by their aerodynamic shape of the blades
- F03D1/0641—Rotors characterised by their aerodynamic shape of the blades of the section profile of the blades, i.e. aerofoil profile
-
- 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
-
- 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
- F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
-
- 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
- F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
- F03D80/30—Lightning protection
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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
- B29L2031/001—Profiled members, e.g. beams, sections
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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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Composite Materials (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Wind Motors (AREA)
Abstract
The invention discloses a lightweight main beam for a wind power blade, a main beam manufacturing method, a wind power blade and a manufacturing method thereof. The wind power blade lightweight main beam comprises supporting parts positioned on two wings of the lightweight main beam and an intermediate connecting part for connecting the two supporting parts, and the manufacturing method comprises the steps of laying an intermediate connecting part reinforcement body, supporting materials of the supporting parts and resin infusion; the main beam structure combination comprises a web plate and a light-weight main beam, and two ends of the web plate are respectively connected with the pressure surface light-weight main beam and the suction surface light-weight main beam through a positioning matching structure; and wind power blades comprising a lightweight main beam structure combination; the wind power blade comprises a wind power blade light-weight main beam structure combination, and the manufacturing method comprises the steps of fixedly connecting the main beam with an upper shell and a lower shell, installing a web plate on the lower shell and hoisting the upper shell. The invention optimizes lighter main beam materials of the wind power blade and a layering mode thereof, provides a corresponding manufacturing method and the wind power blade, and comprehensively realizes the light weight of the wind power blade.
Description
Technical Field
The invention belongs to the technical field of wind power generation, and particularly relates to a lightweight main beam for a wind power blade, a manufacturing method of the main beam, the wind power blade and a manufacturing method of the wind power blade.
Background
The wind power generator mainly depends on wind power blades to capture wind energy, the length of the wind power blades directly influences the capability of the wind power generator to capture the wind energy and the output power of the wind power generator set, and the requirements of the wind power blades for performance improvement are growing increasingly. After the blades are lengthened, the weight is exponentially increased, the gravity center is also deviated to the blade tips, so that the gravity fatigue load and the centrifugal load are obviously increased, the reliability of the blades and a unit is reduced, and the cost is increased. Therefore, it is necessary to reduce the weight of the blade by extending the design technique of the blade family.
The traditional wind power blade has the following disadvantages: 1) the utilization rate of a reinforcing material of a traditional wind power blade main beam cannot be maximized; 2) when the upper shell and the lower shell of the traditional wind power blade are combined, a line needs to be drawn according to the position of a theoretical web, and a cleat or a wood block needs to be bonded at a corresponding position for limiting, so that the positioning of the web is still not accurate enough due to the influence of a measuring mode and an operator, and the bonding and removing work of the cleat or the wood block needs to be performed, so that the operation content is greatly increased, and the weight of the wind power blade is increased by the bonding structure; 3) the double-web or three-web structure of the traditional wind power blade is heavy in weight; 4) the traditional wind power blade is heavy in plate and core materials and poor in mechanical bearing capacity; 5) traditional wind-powered electricity generation blade lightning protection system contains the copper line, the fine cloth of glass of fixed copper line, copper base, glass steel support, and the arrester bonds gluey etc. and the structure is complicated, and weight ratio is great.
Therefore, how to combine the above factors to reduce the weight of the wind power blade is an urgent technical problem to be solved in the research of blade lightweight engineering by the person skilled in the art.
Disclosure of Invention
The invention aims to solve the technical problem of light weight of a wind power blade, overcome the defects and shortcomings in the background technology, and provide a light weight main beam for the wind power blade, a manufacturing method of the main beam, the wind power blade and a manufacturing method of the wind power blade from the aspects of pneumatics, structure, process and materials. In order to solve the technical problems, the technical scheme provided by the invention is as follows:
a wind power blade lightweight main beam comprises supporting parts positioned on two wings of the lightweight main beam and an intermediate connecting part for connecting the two supporting parts;
the cross section of the middle connecting part is in a trapezoid shape, the reinforcing body is formed by sequentially overlapping a plurality of layers of reinforcing fiber cloth from the upper bottom surface to the lower bottom surface of the trapezoid shape, and the cross section of the reinforcing body formed by overlapping the reinforcing fiber cloth is in the trapezoid shape finally.
The reinforcement body formed by overlapping the reinforced fiber cloth provides rigidity and strength for the main beam. The middle connecting part serving as the main bearing structure is a trapezoidal structure reinforcement to provide rigidity and strength for the lightweight main beam, and the lightweight main beam for the wind power blade is lighter than a rectangular structure reinforcement under the same bending rigidity, so that the aim of lightening the blade can be fulfilled.
The reinforced material of the supporting part mainly comprises any one or more of BALSA wood, PVC, PET and HPE with low density, and the supporting part and the middle connecting part are integrally molded through resin infusion.
The supporting part and the middle connecting part are connected by resin infusion, no extra glue is needed for bonding, no bonding gap is needed to be reserved, the forming is simple, and the operation is convenient and fast; the middle connecting part and the supporting part are made of common materials which contain resin, and then resin is used for pouring and molding, so that the adhesion of the resin to the core material and the reinforcing layer is better, and the strength of the manufactured lightweight main beam is higher.
Under the same technical concept, the invention also provides a manufacturing method of the light-weight main beam for the wind power blade, which comprises the following steps:
(1) laying a reinforcing material of the middle connecting part on the main beam mould, wherein the reinforcing body structure of the middle connecting part is in a trapezoidal shape, so that the trapezoidal lower bottom surface of the reinforcing body is abutted against the main beam mould surface;
(2) placing reinforcing materials of a supporting part on two sides of the reinforcing body of the middle connecting part, and enabling one side of the supporting part to cover the trapezoidal side face of the reinforcing body to obtain a reinforcing material composite body;
(3) and integrally pouring the reinforced material composite obtained in the step through a resin pouring process to form the wind power blade lightweight main beam.
Preferably, the method of laying the reinforcing material of the intermediate connection part specifically includes: laying carbon fiber cloth layers with equal width in staggered layers; every layer carbon cloth staggered floor size is L, and first layer is apart from girder mould left end distance and is D, and the second floor is apart from girder mould left end distance and is D + L, and when staggered floor to the (N + 1) th layer, the (N + 1) th layer is apart from girder mould right-hand member distance and is D to this circulation realizes intermediate junction's shop layer structure. The width of carbon cloth shows A, chooses the carbon cloth layer that the width equals for use, and the intermediate junction who lays out is neat more, and the course of working is easier. The carbon fiber cloth layer staggered-layer laying method forms a trapezoidal structure required by the intermediate connection part, and simultaneously reduces the weight of the main beam structure compared with a common plate.
Under the same technical concept, the invention also provides a lightweight wind power blade, which comprises an upper shell, a lower shell and a wind power blade main beam structure combination, wherein one end of the wind power blade main beam structure combination is connected with the upper shell, the other end of the wind power blade main beam structure combination is connected with the lower shell, and the wind power blade main beam structure combination is fixedly connected with the upper shell and the lower shell into a whole; the two ends of the upper shell and the lower shell are correspondingly connected to form a front edge and a rear edge;
the wind power blade main beam structure combination comprises a web plate and two light-weight main beams, wherein each light-weight main beam comprises an upper main beam arranged on the upper shell and a lower main beam arranged on the lower shell;
the upper shell and the lower shell are made of composite materials of compression resistance and shear resistance mechanics, and the composite materials comprise core materials and glass fiber fabrics adhered to the upper surface and the lower surface of the core materials; the sandwich board is used as a support body by the core material, a fiber bundle is placed in the sandwich board in an open path, and a vertical fiber rubber column, an oblique fiber rubber column, a longitudinal fiber rubber rib and a transverse fiber rubber rib are formed in the sandwich board through a gum dipping process, and the oblique fiber rubber column, the longitudinal fiber rubber rib and the transverse fiber rubber rib form a crisscross grid enclosure which is vertically and horizontally interwoven and integrally bonded in the sandwich board; the glass fiber fabrics adhered to the upper surface and the lower surface of the sandwich panel) are adhered with the vertical fiber adhesive columns (81) and the groined fence to form an integral framework.
Preferably, the sandwich panel consists essentially of any one or more of BALSA wood, PVC, PET, HPE; the glass fiber fabric is mainly made of a carbon-glass composite material, and the carbon-glass composite material is designed by mixing carbon fibers and glass fibers, wherein the mass ratio of the carbon fibers to the glass fibers is 10-90: 90-10.
Preferably, a trailing edge web is arranged in a trailing edge cavity formed by the web and the trailing edge.
Preferably, the height of the trailing edge web is smaller than that of the web and is substantially parallel to the web, and two ends of the trailing edge web along the length direction of the blade abut against the inner surface of the upper shell or the lower shell.
Preferably, one side on last girder and lower girder all is provided with location structure, the both ends of web respectively through a location cooperation structure with the location structure of last girder and lower girder is connected to become whole with last girder and lower girder rigid coupling.
Preferably, location structure and location cooperation structure choose recess cooperation location mode for use, one of them sets up to the constant head tank in location structure and the location cooperation structure, and another then sets up to the plug-in components with constant head tank complex.
Preferably, the groove is matched and positioned in any one of the following manners:
the positioning groove is a trapezoidal groove arranged on the upper main beam and the lower main beam, and the inserting piece is an upper foot plate and a lower foot plate which are arranged at two ends of the web plate and matched with the trapezoidal groove;
the locating slot is a V-shaped slot arranged on the upper main beam and the lower main beam, and the insert is a locating convex rib arranged at two ends of the web plate.
Preferably, the web is I-shaped and comprises an upper foot plate and a lower foot plate which are positioned at the upper end and the lower end and matched with the trapezoidal grooves.
Preferably, wind-powered electricity generation blade still includes lightweight lightning protection system, lightning protection system is including covering carbon fiber cloth layer, the strap of at least one deck and the downlead of connecting whole quick-witted lightning protection system on blade shell surface, carbon fiber cloth layer through the additional carbon fiber cloth layer of at least one deck with the thunder and lightning water conservancy diversion extremely the strap of at least one deck, the strap pass through the wire with the downlead is connected.
According to the lightning protection system, the carbon fiber cloth is applied to the lightning protection system, the carbon fiber cloth layer is laid on the surface of the blade and is connected to a root lead of the lightning protection system through the down-lead, when the blade is struck by lightning, lightning current is guided to the lightning protection system of the wind power complete machine, the carbon fiber cloth can bear structural load and can conduct the lightning to the down-lead, and double effects of a conductor and a bearing structure are borne in the lightning protection system of the blade, so that the weight of the lightning protection system of the blade can be effectively reduced, the lightning protection coverage range can be enlarged, the lightning protection lightning receiving efficiency of the blade is improved, and meanwhile, the blade can be effectively protected.
Preferably, the additional carbon fiber cloth layer is provided with a plurality of layers, the metal band is provided with a plurality of layers, and the plurality of layers of additional carbon fiber cloth layers and the plurality of layers of metal band are alternately arranged, so that the lightning is dispersed to the plurality of layers of metal band through the plurality of layers of additional carbon fiber cloth layers and finally guided to the down conductor.
Set up multilayer additional carbon fiber cloth layer and strap between carbon fiber cloth layer and the downlead, additional carbon fiber cloth layer overlaps with carbon fiber cloth layer and strap in turn, reduces the sudden change degree of resistance from carbon fiber cloth layer to strap to at the in-process of lightning current from carbon fiber cloth layer conduction to downlead, reduce the damage of lightning current to the regional carbon fiber in carbon fiber cloth layer nearby, reduce the degree that uses carbon fiber cloth layer preferred, the wind power generation blade damage of lightning protection system.
Under a general technical concept, the invention also provides a manufacturing method of the light wind power blade, which comprises the following steps:
the first step is as follows: fixedly connecting an upper main beam and a lower main beam which are provided with positioning grooves with an upper shell and a lower shell respectively into a whole;
the second step is that: placing a lower main beam which is fixedly connected with the lower shell upwards, and coating structural adhesive in a positioning groove of the lower shell; hoisting the web plate onto the lower main beam, and inserting the lower foot plate of the web plate into the positioning groove coated with the structural adhesive to realize the positioning and fixing of the web plate on the lower main beam;
the third step: coating structural adhesive on the outer surface of an upper foot plate of the web plate, hoisting an upper shell and an upper main beam fixedly connected with the upper shell to the upper part of the web plate, placing the upper shell and the upper main beam down, inserting the upper foot plate of the web plate into a positioning groove of the upper main beam, and fixedly connecting the web plate and the upper main beam through the coated structural adhesive.
Compared with the prior art, the invention has the beneficial effects that:
the wind power blade main beam comprises an intermediate connecting part and a supporting part, the material laying mode of a reinforcement body of the intermediate connecting part is optimized, a trapezoidal laying section is formed, and then the trapezoidal laying section and the supporting part are integrally formed through resin pouring.
The lightweight wind power blade shell provided by the invention adopts a special compression-resistant and shear-resistant mechanical core material, and a compression-resistant mechanical integral structure capable of bearing multidirectional pressure is constructed inside and outside the core material, so that the strength and stability of the blade are improved.
Third, according to the light-weight wind power blade provided by the invention, the strength of the rear edge region can be improved by arranging the small web plate on the rear edge, so that the rear edge bonding width is reduced, and the purpose of light weight of the blade is further realized.
The carbon fiber cloth is applied to a lightning protection system, lightning current is guided to a lightning protection system of the wind power complete machine when the blade is struck by lightning, the carbon fiber cloth can bear structural load and can conduct the lightning to a down lead, and double effects of a conductor and a bearing structure are borne in the lightning protection system of the blade, so that the weight of the lightning protection system of the blade is reduced, and the blade can be effectively protected.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a cross-sectional view of a lightweight main beam;
FIG. 2 is a schematic overall appearance of a wind turbine blade;
FIG. 3 is a schematic illustration of a reinforcement fiber lay-up of a lightweight main beam;
FIG. 4 is a schematic cross-sectional view of a lightweight spar of example 1 after attachment to a blade shell;
FIG. 5 is a cross-sectional view of the web in embodiment 1;
FIG. 6 is a schematic cross-sectional view of the lightweight main beam structure combination and the wind turbine blade shell combined together in example 1;
FIG. 7 is a schematic cross-sectional view of a lightning protection system for a wind turbine blade according to embodiment 1;
FIG. 8 is a schematic structural diagram of the appearance of the side surface of the wind turbine blade in the embodiment 1;
FIG. 9 is a schematic view showing the connection of the carbon fiber cloth layer to the down conductor in example 1;
FIG. 10 is a schematic cross-sectional view of the connection between the carbon fiber cloth layer and the metal tape in example 1;
FIG. 11 is a schematic cross-sectional view of the lightweight spar structure combination of example 2 after attachment to a blade shell;
FIG. 12 is a cross-sectional view of the web in embodiment 2;
FIG. 13 is a schematic cross-sectional view of the lightweight main beam structure combination of embodiment 2 assembled with a wind turbine blade shell;
FIG. 14 is a schematic sectional view of a wind turbine blade according to embodiment 3;
FIG. 15 is a schematic cross-sectional view of the lightweight spar structure combination of example 4 after attachment to a blade shell;
FIG. 16 is a cross-sectional view of the web in embodiment 4;
FIG. 17 is a schematic cross-sectional view of the lightweight main beam structure combination of embodiment 4 assembled with a wind turbine blade shell;
FIG. 18 is a schematic view of a compression mechanical property panel;
FIG. 19 is a schematic view of the fiber structure inside the panel;
in the figure: 1. an upper housing; 2. a lower housing; 3. an upper main beam; 4. a lower main beam; 5. a web; 6. a leading edge; 7. a trailing edge; 8. a trailing edge web; 9. a sandwich panel; 31. an upper positioning groove; 41. a lower positioning groove; 32. a support portion; 33. the left end of the main beam mold; 34. positioning a groove; 35. the right end of the main beam mold; 36. an intermediate connecting portion; 51. an upper foot plate; 52. a lower foot plate; 53. an upper positioning convex rib; 54. a lower positioning convex rib; 81. vertical fiber glue columns; 82. oblique fiber glue columns; 83. longitudinal fiber rubber ribs; 84. transverse fiber rubber ribs; 85. a groined fence is arranged; 86. a glass fiber fabric; 91. a carbon fiber cloth layer; 92. adding a carbon fiber cloth layer; 93. a metal strip; 94. a wire doubling device; 95. a doubling device; 96. and guiding the down wire.
Detailed Description
In order to facilitate understanding of the invention, the invention will be described more fully and in detail with reference to the accompanying drawings and preferred embodiments, but the scope of the invention is not limited to the specific embodiments below.
Unless otherwise defined, all terms of art used hereinafter have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the present invention.
Unless otherwise specifically stated, various raw materials, reagents, instruments, equipment and the like used in the present invention are commercially available or can be prepared by existing methods.
Example 1:
as shown in fig. 1 to 10, a lightweight main beam for wind turbine blades comprises support portions 32 located at both wings of the main beam and intermediate connection portions 36 connecting the two support portions 32;
the section of the intermediate connecting part 36 is trapezoidal, the reinforcement is formed by sequentially overlapping a plurality of layers of reinforcing fiber cloth from the upper bottom surface to the lower bottom surface of the trapezoid, and the cross section of the reinforcement formed by overlapping the reinforcing fiber cloth finally presents a trapezoidal shape. The reinforcing fiber cloth is a carbon fiber cloth layer, and each carbon fiber cloth layer is a trapezoidal reinforcing body formed by laying carbon fiber cloth layers with the same width in a staggered manner (see fig. 3).
The support portion 32 is formed by resin injection integrally with the intermediate connection portion 36, and is made of any one or more of low-density BALSA wood, PVC, PET, and HPE.
The manufacturing method of the lightweight main beam for the wind power blade in the embodiment comprises the following steps:
(1) cleaning a main beam mold, arranging a flow guide system on the surface of the main beam mold, and continuously heating the mold;
(2) as shown in fig. 3, carbon fiber cloth layers with the same width are laid on the lower surface of the main beam mold in a staggered manner, the staggered size of each layer of carbon fiber cloth is 10mm, the distance D between the first layer and the left end 33 of the main beam mold is 150mm, the distance D + L between the second layer and the left end 33 of the main beam mold is 160mm, until the layers are staggered to the 11 th layer, the distance between the 11 th layer and the right end 35 of the main beam mold returns to 150mm, so that a trapezoidal layering structure of the intermediate connecting part 36 is circularly realized, the two ends are provided with trapezoidal chamfers, and the lower bottom surface of the trapezoidal shape abuts against the main beam mold on the lower surface;
(3) laying the reinforcing materials of the supporting parts 32 on two sides of the reinforcing body of the intermediate connecting part 36, and enabling the reinforcing materials of the supporting parts 32 to cover the trapezoidal side surfaces of the reinforcing body of the intermediate connecting part 36 to obtain a reinforcing material composite body;
(4) arranging a flow guide system on the upper surface of the lightweight main beam on which the cloth layer is laid, laying an upper surface main beam mould, and arranging an air exhaust system;
(5) introducing resin by using the vacuum pressure of an air pumping system, controlling the heating temperature of the mold, and curing;
(6) and stopping heating to complete curing and shaping, and demolding and trimming to obtain the lightweight main beam for the wind power blade.
The lightweight wind power blade of this embodiment: the wind power blade main beam structure combination is fixedly connected with the upper shell 1 and the lower shell 2 into a whole; the two ends of the upper shell 1 and the lower shell 2 are correspondingly connected to form a front edge 6 and a rear edge 7.
The lightweight main beams comprise an upper main beam 3 arranged on the upper shell 1 and a lower main beam 4 arranged on the lower shell 2;
the lightweight wind power blade comprises a process of integrally combining an upper shell 1, a lower shell 2, an upper main beam 3, a lower main beam 4 and a web 5, and comprises the following combining steps:
(1) an upper main beam 3 and a lower main beam 4 are respectively fixedly connected with an upper shell 1 and a lower shell 2 into a whole;
(2) placing a lower main beam 4 fixedly connected with the lower shell 2 into a whole upwards, and coating structural adhesive at the web plate connecting and positioning part of the lower main beam 4; hoisting the web 5 onto the lower main beam 4, so that the lower end of the web 5 is attached to the web connecting and positioning part coated with the structural adhesive until the structural adhesive is solidified, and positioning and fixing the web 5 on the lower main beam 4 are completed;
(3) coating structural adhesive on the lower bonding surface 21 of the lower shell and the outer surface of an upper foot plate 51 of a web 5, hoisting the upper shell 1 and an upper main beam 3 fixedly connected with the upper shell 1 to the upper side of the web 5, placing the upper shell 1 and the upper main beam 3 down, enabling the upper end of the web 5 to be bonded to the web connecting and positioning part of the upper main beam 3, and simultaneously enabling an upper bonding surface 11 of the upper shell 1 to be bonded to the lower bonding surface 21 of the lower shell 2 coated with the structural adhesive in a matching manner until the structural adhesive is condensed.
Example 2:
as shown in fig. 11 to 13, another lightweight main beam for a wind turbine blade according to the present invention is made of the same material as in examples 1 and 2, and mainly differs in that the lightweight main beam has a concave positioning structure, and the groove has a trapezoidal groove.
The manufacturing method of the lightweight main beam in this embodiment is basically the same as those in embodiments 1 and 2, and the difference is mainly that in step (3), the reinforcing materials of the support portions 32 are laid on both sides of the reinforcement of the intermediate connection portion 36, so that the reinforcing materials of the support portions 32 cover the trapezoidal side faces of the reinforcement of the intermediate connection portion 36, and then the positioning grooves 34 (specifically including the upper positioning grooves 31 and the lower positioning grooves 41) which can be matched with the upper foot plates 51 and the lower foot plates 52 at the end portions of the wind turbine blade webs 5 in the later period are formed, and a reinforcing material composite is obtained.
The inner groove surface of the positioning groove 34 has a small gap with the upper and lower end surfaces of the web 5, which has the functions of facilitating the web 5 to be placed in the upper positioning groove 31 and the lower positioning groove 41 and keeping the structural adhesive in the small gap. When and after the assembly, the upper foot plate 51 and the lower foot plate 52 are respectively positioned in the upper positioning groove 31 and the lower positioning groove 41 and fixed by structural glue coated in advance.
The embodiment also provides a lightweight wind power blade as shown in fig. 13: the wind power blade main beam structure combination is fixedly connected with the upper shell 1 and the lower shell 2 into a whole; the two ends of the upper shell 1 and the lower shell 2 are correspondingly connected to form a front edge 6 and a rear edge 7.
The lightweight main beams comprise an upper main beam 3 arranged on the upper shell 1 and a lower main beam 4 arranged on the lower shell 2;
one side on last girder 3 and the lower girder 4 all is provided with fore-and-aft location structure, web 5 both ends respectively through a location cooperation structure with last girder 3 and lower girder 4 are connected to become whole with last girder 3 and lower girder 4 rigid coupling.
Location structure and location cooperation structure select for use recess cooperation locate mode, specifically set up location structure into constant head tank 34 for, location cooperation structure sets up to the plug-in components with constant head tank 34 complex.
The positioning slot 34 is a trapezoidal groove provided on the upper and lower main beams 3, 4, and the insert is a foot plate (i.e., the upper and lower foot plates 51, 52 in this embodiment) provided at both ends of the web 5; the web 5 is i-shaped and comprises an upper foot plate 51 and a lower foot plate 52 which are positioned at the upper end and the lower end and matched with the trapezoid grooves.
As shown in fig. 11, the upper main beam 3 is provided with an upper positioning groove 31, the lower main beam is provided with a lower positioning groove 41, the inner groove surface of the upper positioning groove 31 and the inner groove surface of the lower positioning groove 41 are respectively matched with the surfaces of the upper foot plate 51 and the lower foot plate 52, and the upper foot plate 51 and the lower foot plate 52 are respectively positioned in the upper positioning groove 31 of the upper main beam 3 and the lower positioning groove 41 of the lower main beam 4.
The lightweight wind power blade comprises a process of integrally combining an upper shell 1, a lower shell 2, an upper main beam 3, a lower main beam 4 and a web 5, and comprises the following combining steps:
(1) an upper main beam 3 and a lower main beam 4 which are provided with positioning grooves are fixedly connected with an upper shell 1 and a lower shell 2 respectively into a whole;
(2) placing the lower main beam 4 fixedly connected with the lower shell 2 upwards, and coating structural adhesive in a positioning groove 34 of the lower main beam 4; hoisting the web 5 onto the lower main beam 4, inserting the lower foot plate 52 of the web 5 into the positioning groove 34 coated with the structural adhesive until the structural adhesive is solidified, and completing the positioning and fixing of the web 5 on the lower main beam 4;
(3) coating structural adhesive on the lower bonding surface 21 of the lower shell and the outer surface of an upper foot plate 51 of a web plate 5, hoisting the upper shell 1 and an upper main beam 3 fixedly connected with the upper shell 1 to the upper side of the web plate 5, placing the upper shell 1 and the upper main beam 3 down, inserting the upper foot plate 51 of the web plate 5 into a positioning groove 34 of the upper main beam 3, and simultaneously enabling an upper bonding surface 11 of the upper shell 1 to be coincided and attached with the lower bonding surface 21 of the lower shell 2 coated with the structural adhesive until the structural adhesive is condensed.
Example 3:
the embodiment also provides a wind power blade of the invention: including last casing 1, lower casing 2 and wind-powered electricity generation blade lightweight girder structural grouping, casing 1 is connected to the one end of wind-powered electricity generation blade lightweight girder structural grouping, and casing 2 is down connected to the other end, and wind-powered electricity generation blade lightweight girder structural grouping becomes one with last casing 1, lower casing 2 rigid coupling. The wind power blade lightweight main beam structure combination of the embodiment is basically the same as the structure of the embodiment 2, and the difference is that the wind power blade lightweight main beam structure combination of the embodiment is provided with two sets. Specifically, as shown in fig. 14, a front edge 6 and a rear edge 7 of the wind power blade are respectively formed at the butt joint of the two sides of the upper shell 1 and the lower shell 2, in two sets of wind power blade lightweight main beam structure combinations, one set of wind power blade lightweight main beam structure combination is completely the same as that in embodiment 2, and includes a web 5 and two lightweight main beams for the wind power blade in embodiment 2, and a rear edge web 8 is further arranged in a rear edge cavity formed by the web 5 and the rear edge 7. The structure and the composition of the trailing edge web 8 are basically the same as those of the wind turbine blade lightweight main beam structure combination in the embodiment 2, and only slight differences exist in height and shape.
Example 4:
as shown in fig. 15-17, another lightweight main beam for wind turbine blades according to the present invention has the same overall structure, material and manufacturing method as those of embodiment 2, and is mainly characterized in that the groove of the lightweight main beam has a "V" shaped groove.
The embodiment also provides a lightweight wind power blade as shown in fig. 17: the wind power blade main beam structure combination is fixedly connected with the upper shell 1 and the lower shell 2 into a whole; the two ends of the upper shell 1 and the lower shell 2 are correspondingly connected to form a front edge 6 and a rear edge 7.
As shown in fig. 15 to 17, the lightweight main beams include an upper main beam 3 disposed on the upper case 1 and a lower main beam 4 disposed on the lower case 2; one side on last girder 3 and the lower girder 4 all is provided with fore-and-aft location structure, web 5 both ends respectively through a location cooperation structure with last girder 3 and lower girder 4 are connected to become whole with last girder 3 and lower girder 4 rigid coupling.
Location structure and location cooperation structure select for use recess cooperation locate mode, specifically set up location structure into constant head tank 34 for, location cooperation structure sets up to the plug-in components with constant head tank 34 complex.
The positioning groove 34 is a V-shaped groove arranged on the upper main beam 3 and the lower main beam 4, and the insertion piece is a positioning convex rib arranged at two ends of the web 5;
the web plate 5 is i-shaped, and comprises an upper foot plate 51 and a lower foot plate 52 which are positioned at the upper end and the lower end and matched with the trapezoidal grooves, and positioning concave ribs are respectively arranged on the upper foot plate 51 and the lower foot plate 52.
The upper top surface of the upper foot plate 51 and the lower bottom surface of the lower foot plate 52 are respectively provided with a longitudinal upper positioning convex rib 53 and a longitudinal lower positioning convex rib 54, the inner groove surface of the upper positioning groove 31 and the inner groove surface of the lower positioning groove 41 are matched with the outer surface of the upper positioning convex rib 53 and the outer surface of the lower positioning convex rib 54, the upper positioning convex rib 53 of the upper foot plate 51 of the I-shaped web plate 5 is arranged in the upper positioning groove 31 of the upper main beam 3, and the lower positioning convex rib 54 of the lower foot plate 52 of the I-shaped web plate 5 is arranged in the lower positioning groove 41 of the lower main beam 4.
The manufacturing method of the wind power blade lightweight main beam is basically the same as that of the wind power blade lightweight main beam in the embodiment 2, and only the shapes of the slots are slightly different.
In the above embodiments, the upper shell 1 and the lower shell 2 of the wind turbine blade are made of a composite material capable of withstanding multi-directional pressure and shear force. The composite material comprises a core material and glass fiber fabrics 86 adhered to the upper surface and the lower surface of the core material; the sandwich panel 9 is used as a support body of a core material, fiber bundles are placed in the sandwich panel in an open path, after a glue dipping process, a vertical fiber glue column 81, an oblique fiber glue column 82, a longitudinal fiber glue rib 83 and a transverse fiber glue rib 84 can be formed in the sandwich panel 9, the oblique fiber glue column 82, the longitudinal fiber glue rib 83 and the transverse fiber glue rib 84 form a groined fence 85 which is longitudinally and transversely interwoven and integrally bonded in the sandwich panel 9, and simultaneously, an integral framework formed by bonding a glass fiber fabric 86, the vertical fiber glue column 81 and the groined fence 85 is formed by utilizing glass fiber fabrics 86 arranged on the upper surface and the lower surface of the sandwich panel 9 before glue dipping.
The vertical glue columns 81 act in the structure to directly resist the positive pressure exerted on the sandwich panel 9. The pressure applied to the panel is in all directions other than the positive pressure, and therefore, the diagonal fiber gel columns 82 are provided in the structure. The longitudinal fiber rubber ribs 83 and the transverse fiber rubber ribs 84 mainly function to bond all the oblique fiber rubber columns 82 to an integral framework through glue, so that the stability of each oblique fiber rubber column 82 when encountering pressure can be enhanced, and the compression resistance of the sandwich panel 9 for resisting the pressure in all directions can be obviously enhanced. Secondly, the longitudinal fiber rubber ribs 83 and the transverse fiber rubber ribs 84 significantly enhance the tensile property of the sandwich panel 9 in the horizontal direction. As shown in fig. 19, the groined fence 85 is actually only a part of the mechanical overall structure constructed in the sandwich panel 9.
As shown in fig. 18 and 19, the oblique fiber glue columns 82, the longitudinal fiber glue bars 83 and the transverse fiber glue bars 84 form criss-cross grid-shaped barriers 85 which are integrally bonded in a criss-cross manner in the sandwich panel 9, two oblique fiber glue columns 82 which are adjacent in a transverse direction in the sandwich panel 9 are bonded to two sides of the longitudinal fiber glue bars 83 in an X-shape, two oblique fiber glue columns 82 which are adjacent in a longitudinal direction in the sandwich panel 9 are bonded to two sides of the transverse fiber glue bars 84 in an X-shape, and simultaneously, the longitudinal fiber glue bars 83 and the transverse fiber glue bars 84 which are adjacent to each other are bonded to each other.
Opening up a path to place a fiber bundle, namely forming a plurality of orthogonal longitudinal cutting seams and transverse cutting seams on the sandwich panel at equal intervals, and dividing the sandwich panel into a plurality of sandwich squares with connected bottoms; vertical holes are drilled downwards on the sandwich block, and inclined holes are drilled downwards at the edge parts of 4 sides of the sandwich block along the front surface, the left side surface, the rear surface and the right side surface respectively.
The sandwich board 9 mainly comprises one or more of BALSA, PVC, PET and HPE, is easy to cut and punch, can be used for freely building various frame bodies in the board to form a good support body, has light weight, and can be used as a qualified sandwich material for the blade root area of the wind power blade shell after being built into a compression-resistant mechanical integral structure. The used glass fiber fabric is made of a carbon-glass composite material, and the carbon-glass composite material is designed by mixing carbon fibers and glass fibers, wherein the mass ratio of the carbon fibers to the glass fibers is 10-90: 10-90.
The vertical fiber glue column 81, the oblique fiber glue column 82, the longitudinal fiber glue rib 83 and the transverse fiber glue rib 84, as well as the oblique fiber glue column 82, the longitudinal fiber glue rib 83 and the transverse fiber glue rib 84 form a crisscross grid fence 85 which is vertically and horizontally interwoven and integrally bonded in the sandwich panel, and an integral framework formed by bonding the glass fiber fabrics 86 arranged on the upper surface and the lower surface with the vertical fiber glue column 81 and the crisscross grid fence 85 is formed by bonding through a one-step glue dipping process. The concrete sequence is that holes are arranged in the sandwich panel 9, a fiber bundle is placed in a cutting seam, the glass fiber fabric 86 is adhered, and gum dipping and curing are carried out to form an integral framework.
The wind power blade of each embodiment further comprises a lightweight lightning protection system:
as shown in fig. 7, the lightning protection system for the wind turbine blade using the carbon fiber cloth layer mainly comprises a carbon fiber cloth layer 91 covering the surfaces of an upper shell 1 and a lower shell 2, a metal band 93, a down lead 96 connected with the lightning protection system, a doubling device 95 and a wire doubling device 94, wherein the carbon fiber cloth layer 91 guides lightning to the metal band 93, and the metal band 93 is finally connected with the down lead 96 through a wire.
As shown in fig. 8, a wind turbine blade of the present invention is provided with the wind turbine blade lightning protection system of the above embodiment on an upper shell 1 and a lower shell 2. Wherein, carbon fiber cloth layer 91 covers the outside surface at last casing 1 and lower casing 2, and lays to the blade root from the apex all the time, and carbon fiber cloth layer 91's width is selected according to carbon fiber material's water conservancy diversion bearing capacity to lightning current passes through carbon fiber cloth layer 91 and does not damage carbon fiber cloth layer and is the minimum requirement. The carbon fiber cloth layer 91 serves as a dual function of structural bearing and lightning-inducing flow guide in the wind power blade of the embodiment.
As shown in fig. 8, the carbon fiber cloth layer 91 and the metal tape 93 are connected to the surface of the blade shell by integral pouring, and the connection point is located at a distance of 30% of the length of the wind blade from the blade root. As shown in fig. 7 and 10, the carbon fiber cloth layer 91 guides the lightning to the two layers of metal strips 93 through the two layers of additional carbon fiber cloth layers 92 at the position close to the blade root of the blade; the carbon fiber cloth layer 91 is firstly overlapped with one additional carbon fiber cloth layer 92, the additional carbon fiber cloth layer 92 of each layer is then overlapped with the metal belt 93 of each layer in an alternating mode, the overlapping area of each layer is consistent, the carbon fiber cloth layer 91 and the additional carbon fiber cloth layer 92 completely cover the metal belt 93, the overlapping thickness is achieved until the current passing capacity reaches the lightning current standard 200KA, and lightning is dispersed to the multiple layers of the metal belts 93 through the multiple layers of the additional carbon fiber cloth layers 92 and finally guided to the down-lead wire 96. Through the above-mentioned design of alternately overlapping additional carbon fiber cloth layer 92 and metal band 93 in multiple layers, the abrupt change degree of resistance from carbon fiber cloth layer 91 to metal band 93 can be reduced, thereby reducing the damage of lightning current to the carbon fiber in the area near the carbon fiber cloth layer in the process of conducting lightning current from carbon fiber cloth layer 91 to down conductor 96.
Specifically, carbon fiber cloth layer 91 is connected at blade shell surface through integrative the pouring, fills the in-process, and carbon fiber cloth layer 91 is spread in the mould, and the resin is reinfused for resin and the inboard integrative structure that forms of carbon fiber cloth layer 91, there is not the resin parcel in the carbon fiber cloth layer 91 outside, exposes in order to conduct the thunder and lightning outside.
As shown in fig. 9, a metal band 93 passes through the upper shell 1 and the lower shell 2 and extends into the blade cavity to be twisted into a strand, and is connected with the conducting wires through a wire doubling device 95, meanwhile, the upper conducting wire and the lower conducting wire are connected with a down-lead 96 through a wire doubling device 94, and the down-lead 96 is connected with the lightning protection system of the whole machine at the blade root.
Lay the carbon fiber cloth layer through pouring into at the casing surface and connect the lightning stroke, can enlarge and connect the area of dodging, improve and connect and dodge efficiency to with the leading-in blade root downlead of lightning stroke.
Claims (13)
1. A lightweight main beam for wind power blades is characterized by comprising support parts (32) positioned at two wings of the lightweight main beam and an intermediate connecting part (36) connecting the two support parts (32);
the section of the middle connecting part (36) is in a trapezoid shape, the reinforcement body is formed by sequentially overlapping a plurality of layers of reinforcement fiber cloth from the upper bottom surface to the lower bottom surface of the trapezoid, and the cross section of the reinforcement body formed by overlapping the reinforcement fiber cloth is in the trapezoid shape;
the reinforced material of the supporting part (32) mainly comprises any one or more of BALSA, PVC, PET and HPE, and the supporting part (32) and the intermediate connecting part (36) are integrally molded through resin infusion.
2. A manufacturing method of a light-weight main beam for wind power blades is characterized by comprising the following steps:
the first step is as follows: paving a reinforcing material of the intermediate connecting part (36) on the main beam mould, so that a reinforcing body of the intermediate connecting part (36) is in a trapezoidal shape, and the trapezoidal lower bottom surface of the reinforcing body is abutted against the main beam mould surface;
the second step is that: placing reinforcing materials of a supporting part (32) on two sides of a reinforcing body of the middle connecting part (36), and enabling the reinforcing materials of the supporting part (32) to cover the trapezoidal side surface of the reinforcing body to obtain a reinforcing material composite;
the third step: and integrally pouring the reinforced material composite obtained in the step by a resin pouring process to finally prepare the lightweight main beam for forming the air-out electric blade.
3. The method for manufacturing the lightweight main beam for the wind turbine blade according to claim 2, wherein the method for laying the reinforcing material of the intermediate connection portion (36) specifically includes: carbon fiber cloth layers (91) with equal width are laid in staggered layers; the size of each carbon fiber cloth staggered layer is L, the distance from the first layer to the left end (33) of the main beam mold is D, the distance from the second layer to the left end (33) of the main beam mold is D + L, and the distance from the Nth layer to the right end (35) of the main beam mold returns to D until the staggered layer reaches the Nth layer.
4. The lightweight wind power blade is characterized by comprising an upper shell (1), a lower shell (2) and a wind power blade main beam structure combination, wherein one end of the wind power blade main beam structure combination is connected with the upper shell (1), the other end of the wind power blade main beam structure combination is connected with the lower shell (2), and the wind power blade main beam structure combination is fixedly connected with the upper shell (1) and the lower shell (2) into a whole; the two ends of the upper shell (1) and the lower shell (2) are correspondingly connected to form a front edge (6) and a rear edge (7);
the wind power blade main beam structure combination comprises a web plate (5) and two light-weight main beams according to claim 1, wherein each light-weight main beam comprises an upper main beam (3) arranged on an upper shell (1) and a lower main beam (4) arranged on a lower shell (2);
the upper shell (1) and the lower shell (2) are made of composite materials of compression resistance and shear resistance mechanics, and the composite materials comprise core materials and glass fiber fabrics (86) adhered to the upper surface and the lower surface of the core materials; the sandwich panel (9) is used as a support body by the core material, a fiber bundle is placed in the sandwich panel (9) in an open path, a vertical fiber glue column (81), an oblique fiber glue column (82), a longitudinal fiber glue rib (83) and a transverse fiber glue rib (84) are formed in the sandwich panel (9) through a glue dipping process, and the oblique fiber glue column (82), the longitudinal fiber glue rib (83) and the transverse fiber glue rib (84) form a crisscross grid enclosure (85) which is vertically and horizontally interwoven and integrally bonded in the sandwich panel (9); the glass fiber fabrics (86) adhered to the upper surface and the lower surface of the sandwich panel (9) are adhered to the vertical fiber adhesive columns (81) and the groined fence (85) to form an integral framework.
5. The lightweight wind blade according to claim 4 wherein the sandwich panels (9) consist essentially of any one or more of BALSA, PVC, PET, HPE; the glass fiber fabric (86) is mainly made of a carbon-glass composite material, and the carbon-glass composite material is designed by mixing carbon fibers and glass fibers, wherein the mass ratio of the carbon fibers to the glass fibers is 10-90: 90-10.
6. The lightweight wind blade according to claim 4, characterized in that a trailing edge web (8) is arranged in a trailing edge cavity formed by the web (5) and the trailing edge (7).
7. The lightweight wind power blade according to claim 6, wherein the height of the trailing edge web (8) is less than the height of the web (5) and is substantially parallel to the web (5), and two ends of the trailing edge web (8) along the length direction of the blade abut against the inner surface of the upper shell (1) or the lower shell (2).
8. The lightweight wind power blade according to claim 7, wherein longitudinal positioning structures are arranged on one side of each of the upper main beam (3) and the lower main beam (4), and two ends of the web (5) are respectively connected with the positioning structures of the upper main beam (3) and the lower main beam (4) through a positioning matching structure and are fixedly connected with the upper main beam (3) and the lower main beam (4) into a whole.
9. The wind power blade with the light weight according to claim 8, wherein the positioning structure and the positioning matching structure adopt a groove matching positioning mode, one of the positioning structure and the positioning matching structure is provided as a positioning groove (34), and the other one is provided as an insertion piece matched with the positioning groove (34).
10. The lightweight wind power blade according to claim 9, wherein the groove is located in a matching manner selected from any one of the following manners:
the positioning groove (34) is a trapezoidal groove formed in the upper main beam (3) and the lower main beam (4), and the inserting pieces are an upper foot plate (51) and a lower foot plate (52) which are arranged at two ends of the web plate (5) and matched with the trapezoidal groove;
the positioning groove (34) is a V-shaped groove arranged on the upper main beam (3) and the lower main beam (4), and the insertion piece is a positioning convex rib arranged at two ends of the web plate (5).
11. The lightweight wind blade according to any of claims 4-10 further comprising a lightning protection system, wherein the lightning protection system comprises a carbon fiber cloth layer (91) covering the surface of the upper shell (1) and/or the lower shell (2), an additional carbon fiber cloth layer (92), at least one metal band (93) and a down conductor (96) connecting the whole machine lightning protection system, the carbon fiber cloth layer (91) guides the lightning to the at least one metal band (93) through the at least one additional carbon fiber cloth layer (92), and the metal band (93) is connected with the down conductor (96) through a conductor.
12. The lightweight wind power blade according to claim 11, wherein the additional carbon fiber cloth layer (92) is provided with a plurality of layers, the metal belt (93) is provided with a plurality of layers, and the plurality of layers of additional carbon fiber cloth layers (92) and the plurality of layers of metal belt (93) are alternately arranged, so that lightning is dispersed to the plurality of layers of metal belt (93) through the plurality of layers of additional carbon fiber cloth layers (92) and finally guided to the down conductor (96); the overlapping area of each additional carbon fiber cloth layer (92) is consistent, and each additional carbon fiber cloth layer (92) completely covers the metal belt (93).
13. A manufacturing method of a lightweight wind power blade is characterized by comprising the following steps:
the first step is as follows: an upper main beam (3) and a lower main beam (4) which are provided with positioning grooves (34) are fixedly connected with an upper shell (1) and a lower shell (2) into a whole respectively;
the second step is that: placing an upper main beam (3) fixedly connected with the lower shell (2) into a whole upwards, and coating structural adhesive at the web plate connecting and positioning part of the lower shell (2); hoisting the web plate (5) to the lower main beam (4), and inserting a lower foot plate (52) of the web plate (5) into the positioning groove (34) coated with the structural adhesive to realize the positioning and fixing of the web plate (5) on the lower main beam (4);
the third step: coating structural adhesive on the outer surface of an upper foot plate (51) of a web plate (5), hoisting an upper shell (1) and an upper main beam (3) fixedly connected with the upper shell (1) to the upper side of the web plate (5), placing the upper shell (1) and the upper main beam (3) down, inserting the upper foot plate (51) of the web plate (5) into a positioning groove (34) of the web plate (5) of the upper main beam (3), and fixedly connecting the web plate (5) and the upper main beam (3) through the coated structural adhesive.
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Application publication date: 20210910 |