CN113752590A - Structural member of wind power blade and preparation method of wind power blade shell - Google Patents
Structural member of wind power blade and preparation method of wind power blade shell Download PDFInfo
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- CN113752590A CN113752590A CN202111082081.0A CN202111082081A CN113752590A CN 113752590 A CN113752590 A CN 113752590A CN 202111082081 A CN202111082081 A CN 202111082081A CN 113752590 A CN113752590 A CN 113752590A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 239000011162 core material Substances 0.000 claims abstract description 28
- 239000011347 resin Substances 0.000 claims abstract description 24
- 229920005989 resin Polymers 0.000 claims abstract description 24
- 238000000034 method Methods 0.000 claims description 20
- 230000008569 process Effects 0.000 claims description 13
- 238000004519 manufacturing process Methods 0.000 claims description 12
- 239000003365 glass fiber Substances 0.000 claims description 9
- 239000002131 composite material Substances 0.000 claims description 8
- 230000005611 electricity Effects 0.000 claims description 6
- 239000004744 fabric Substances 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 5
- 238000007711 solidification Methods 0.000 claims 1
- 230000008023 solidification Effects 0.000 claims 1
- 240000007182 Ochroma pyramidale Species 0.000 description 7
- 238000001802 infusion Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000000805 composite resin Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
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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
- B29C70/30—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
- B29C70/36—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 impregnating by casting, e.g. vacuum casting
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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
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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
- F03D1/065—Rotors characterised by their construction elements
- F03D1/0675—Rotors characterised by their construction elements of the blades
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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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Composite Materials (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Wind Motors (AREA)
Abstract
The invention discloses a structural member of a wind power blade and a preparation method of a wind power blade shell, wherein the structural member is laid between main bearing structures of the wind power blade and comprises the following steps: the blade core material comprises a first side wall, a second side wall arranged opposite to the first side wall, a third side wall arranged adjacent to the first side wall and the second side wall, and a fourth side wall arranged opposite to the third side wall, wherein the third side wall and the fourth side wall are both arcs on the cross section of the structural member, and the extending surfaces of the first side wall and the second side wall in the same extending direction have an included angle, so that the weight of the blade core material is greatly reduced; the cost of the blade is effectively reduced, and the buckling resistance of the core material area of the blade is greatly improved; the surface with the radian can ensure that the structural part is well attached to the surface of the blade mould, so that a blade resin pouring flow channel is formed, and the manufacturability is good.
Description
Technical Field
The invention relates to the technical field of wind power blade design and manufacture, in particular to a structural member of a wind power blade and a preparation method of a wind power blade shell.
Background
The main bearing structure of the wind power blade is made of plates (i.e. fiber reinforced resin composite material pultruded plates) and comprises a blade main beam and a trailing edge auxiliary beam. Use the core to fill between the main bearing structure, the core main material of current wind-powered electricity generation blade casing is Balsa wood, PET and PVC, non-main bearing structure, mainly used buckling-resistant. Increasing the core thickness is the most effective way to increase the buckling resistance.
Along with the improvement of blade length and load, the design thickness of blade shell core material increases, has brought two problems among the prior art: firstly, the thickness of the core material is too large, and the quality problem of the blade is caused by the problem of resin infusion during the production of the blade; secondly, the use amount of the core material is increased more, the price of the core material is high, the supply chain is unstable, and the total cost of the blade is greatly improved.
Disclosure of Invention
The invention aims to provide a structural member of a wind power blade and a preparation method of a wind power blade shell. The method aims to solve the problems of resin infusion and cost increase caused by the increase of the design thickness of the core material of the blade shell in the prior art.
In order to achieve the purpose, the invention is realized by the following technical scheme:
in one aspect, the present invention provides a structural member of a wind turbine blade, the structural member is laid between main bearing structures of the wind turbine blade, and the structural member includes: a first sidewall, a second sidewall disposed opposite the first sidewall, a third sidewall disposed adjacent to both the first sidewall and the second sidewall, a fourth sidewall disposed opposite the third sidewall, the fourth sidewall disposed adjacent to both the first sidewall and the second sidewall,
the third side wall and the fourth side wall on the cross section of the structural member are both arcs, the arc directions of the two arcs are consistent,
the extending surfaces of the first side wall and the second side wall in the same extending direction form an included angle;
the structural member is integrally of a long strip hexahedral structure with two closed ends, and the interior of the structural member is hollow.
Preferably, the value range of the angle x of the included angle is as follows: x is more than or equal to 0.5 degrees and less than or equal to 2.5 degrees.
Preferably, a plurality of grooves are arranged on at least one of the first side wall to the fourth side wall at intervals.
Preferably, the plurality of grooves are spaced apart from each other on the first side wall and the second side wall, and each groove extends along the height direction of the corresponding first side wall and the second side wall.
Preferably, four top corners of the cross section of the structural member are respectively provided with a chamfer.
Preferably, the cross section of the arc surface is an arc, the radius of the arc is designed according to the curvature of the blade mold, and the smaller the curvature of the blade mold is, the larger the radius of the arc is.
Preferably, the radius of the circular arc is greater than or equal to D/2, wherein D is the radius of the blade root circle.
Preferably, the structure further comprises a plurality of ribs arranged inside the structure.
Preferably, the structural member is formed by a pultrusion process using a bundle of glass fibre yarns.
On one hand, the invention also provides a preparation method of the structural member of the wind power blade, and the preparation method of the structural member comprises the following steps:
step S1: manufacturing a mould of the structural part according to the design drawing of the structural part;
step S2: manufacturing four side walls of the hexahedral structure of the pultruded glass fiber composite material by using a pultrusion process according to the mold of the structural member to form a pultruded structural member;
step S3: sealing edges at two ends of the pultrusion structural member to form a hollow hexahedral structure, namely the structural member;
preferably, the mold of the structural member is manufactured according to the design drawing of the mechanical member of the wind turbine blade, and the manufacturing tool of the groove is added at the position of the pultruded structural member which is not cured after the structural member is taken out of the mold, so as to form the groove.
On the other hand, the invention also provides a preparation method of the wind power blade shell, which comprises the following steps:
step T1: obtaining a blade shell mold and a plurality of structural parts in advance;
step T2: laying a composite fabric cloth layer in the blade shell mould;
step T3: a plurality of same structural members are laid in the area of the blade core material;
step T4: and (4) after all layers of the blade are laid, resin is poured, and the blade shell is formed after the resin is cured.
Preferably, the length direction of the laid structural member is consistent with or tends to be consistent with the length direction of the blade.
The invention also provides a wind power blade, and the shell of the wind power blade is prepared by applying the preparation method of the wind power blade shell.
Compared with the prior art, the invention has the following beneficial effects:
the invention provides a structural member for replacing a large-thickness blade shell core material Balsa in the prior art, so that the weight of the blade core material is greatly reduced; the cost of the blade is effectively reduced, the buckling resistance of a core material area of the blade is greatly improved, the modulus of the blade in the length direction is greatly improved, and the corresponding buckling resistance strength can also be greatly improved as the modulus is in direct proportion to the buckling resistance strength; the blade resin pouring runner has the advantages that the manufacturability is good, the surface with the radian can ensure that the structural part can be well attached to the surface of the blade mould, and the blade resin pouring runner is formed through the design of the grooves and has good manufacturability.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description will be briefly introduced, and it is obvious that the drawings in the following description are an embodiment of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts according to the drawings:
FIG. 1 is a cross-sectional view of a structural member of a wind turbine blade according to an embodiment of the present invention;
FIG. 2 illustrates a recess in a first sidewall of a structural member according to an embodiment of the present invention;
FIG. 3 is a schematic view of a groove along the length direction of the structural member according to an embodiment of the present invention;
FIG. 4 is a top view of two structural members according to one embodiment of the present invention after being laid;
FIG. 5 is a schematic view of a groove at position A after two structural members are spliced according to an embodiment of the present invention;
FIG. 6 is a schematic view of a structural member in place of a core material laid in a shell according to an embodiment of the present invention;
description of reference numerals: 1-structural member, 101-groove, 102-groove.
Detailed Description
The structural member of the wind turbine blade and the method for manufacturing the wind turbine blade shell according to the present invention will be described in detail with reference to fig. 1 to 6 and the following embodiments. The advantages and features of the present invention will become more apparent from the following description. It is to be noted that the drawings are in a very simplified form and are all used in a non-precise scale for the purpose of facilitating and distinctly aiding in the description of the embodiments of the present invention. To make the objects, features and advantages of the present invention comprehensible, reference is made to the accompanying drawings. It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the implementation conditions of the present invention, so that the present invention has no technical significance, and any structural modification, ratio relationship change or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention.
In view of the not enough of blade core among the prior art, resin infusion problem and the cost increase problem that brings are designed the increase of thickness to the blade shell core among the prior art in order to solve.
The embodiment provides a wind-powered electricity generation blade's structure, this structure is laid between wind-powered electricity generation blade's main bearing structure for replace the current blade core of laying between wind-powered electricity generation blade main bearing structure, include: a first sidewall, a second sidewall disposed opposite the first sidewall, a third sidewall disposed adjacent to both the first sidewall and the second sidewall, a fourth sidewall disposed opposite the third sidewall, the fourth sidewall disposed adjacent to both the first sidewall and the second sidewall,
the third lateral wall with on the cross section of structure the fourth lateral wall is a circular arc, two the arc of circular arc is to unanimous, avoids appearing the third lateral wall with the fourth lateral wall is the curved condition along length direction.
The extending surfaces of the first side wall and the second side wall in the same extending direction form an included angle; the structural member is integrally of a long strip hexahedral structure with two closed ends, and the interior of the structural member is hollow.
The angle x of the included angle has a preferred value range as follows: x is more than or equal to 0.5 degrees and less than or equal to 2.5 degrees, the third side and the fourth side are arc surfaces, and the extension surfaces of the first side wall and the second side wall in the same extension direction have an included angle, so that the outer contour of the cross section of the hexahedral structure is in a sector ring shape, and the structural member is convenient to splice.
At least one of the first side wall and the fourth side wall is provided with a plurality of grooves at intervals.
As shown in fig. 2, in this embodiment, a plurality of the grooves are spaced apart from each other on the first sidewall and the second sidewall, and each of the grooves extends along the height direction of the corresponding first sidewall and the corresponding second sidewall.
Four apex angle departments of structure cross section are equipped with a chamfer respectively, and in this embodiment, the chamfer design is the fillet, two during the concatenation of structure 1, the fillet forms slot 102 along length direction for resin flows at length direction when blade resin pours into.
The section of the arc surface is an arc, the radius of the arc is designed according to the curvature of the blade mold, and the smaller the curvature of the blade mold is, the larger the radius of the arc is.
The radius of the circular arc is more than or equal to D/2, wherein D is the radius of the blade root circle.
The structural member further comprises a plurality of ribs which are arranged inside the structural member.
The structural member is formed by a pultrusion process by adopting glass fiber yarn bundles.
On one hand, the embodiment also provides a preparation method of the structural member of the wind power blade, and the preparation method of the structural member comprises the following steps:
step S1: manufacturing a mould of the structural part according to the design drawing of the structural part;
step S2: manufacturing four side walls of the hexahedral structure of the pultruded glass fiber composite material by using a pultrusion process according to the mould of the structural member to form a pultruded structural member, and adding a manufacturing tool of the groove at the position of the pultruded structural member which is not cured after the pultruded structural member is discharged from the mould to form the groove;
step S3: sealing edges at two ends of the pultrusion structural member to form a hollow hexahedral structure, namely the structural member;
on the other hand, the embodiment also provides a preparation method of the wind power blade shell, which comprises the following steps:
step T1: obtaining a blade shell mold and a plurality of structural parts in advance;
step T2: laying a composite fabric cloth layer in the blade shell mould;
step T3: a plurality of same structural members are laid in the area of the blade core material;
step T4: and (4) after all layers of the blade are laid, resin is poured, and the blade shell is formed after the resin is cured.
The length direction of the laid structural member is consistent with or tends to be consistent with the length direction of the blade.
The invention also provides a wind power blade, and the shell of the wind power blade is prepared by applying the preparation method of the wind power blade shell.
The hollow structural member 1 formed by drawing in cross section as shown in fig. 1 is used in place of the blade shell core material.
Wherein the cross section shown in fig. 1 has the following features: the first edge A and the second edge B are arc lines, the radius of the arc is designed according to the curvature of the blade mould, preferably, the radius is between D/2 and D, and D is the diameter of a blade root circle. The edges A and B are radians, so that the structural part 1 and the blade mould have better fitting performance, the edges A and B on the structural part 1 tend to be fitted with the blade mould, and when a gap exists between the structural part and the blade mould, the structural part and the blade mould can be filled with other materials; secondly, the edge C and the edge D are straight lines, and the edge C and the edge D have a certain included angle, preferably, the included angle is between 0.5 and 2.5 degrees; make the outline in cross-section be a fan ring-type, be convenient for the concatenation of structure, three, four corner points department have the radius angle, and four corners are equipped with the radius angle, two during 1 concatenations of structure, along length direction formation slot 102, the resin is at length direction's flow when the blade resin of being convenient for pours into, and the thickness t of structure is between 0.5mm to 2mm, and the length of limit C and limit D is between 8mm to 50 mm.
The hollow structural member 1 has the following features: the structural part 1 is a hollow thin-wall structure, the wall thicknesses of four edges can be designed according to the buckling strength requirement of the blade, and the inner hollow part can be designed by adding ribs according to the strength; secondly, the structure extends along the length direction of the structural part, grooves 101 along the height direction are arranged at intervals, and the arrangement of the grooves 101 is shown in FIG. 2; and thirdly, two end faces of the hollow structural member 1 are closed.
The structural member 1 shown in fig. 2 may be a glass fiber composite material manufactured by a pultrusion process, and a forming process of a height direction groove 101 and an end face hole sealing process are added.
The structural member 1 shown in fig. 2 is placed in the core region of the blade shell in the length direction of the blade and the length direction of the blade are basically the same, and the chord direction is formed by splicing the same structural members 1, which is shown in fig. 3, 4 and 5. The splicing of the structural part 1 has the following characteristics: firstly, because the cross section corner points are provided with chamfers, a groove 102 in the length direction can be formed, and the groove 102 is beneficial to the flowing of resin in the length direction when the blade resin is poured; and secondly, the groove 101 is provided with a height direction, and the groove 101 is used for facilitating the flow of resin in the thickness direction of the structural part when the blade resin is poured. In addition, because the hole sealing treatment is carried out on the end face of the structural part 1, resin cannot enter when blade resin is poured, and the hollow characteristic of the structure is ensured.
Assuming that the cross-sectional dimensions shown in fig. 1 have a side length a of 80mm, a side length C of 40mm and a thickness of 1mm, the structural element 1 is used instead of a 40mm thick Balsa wood.
The structural member 1 is formed by a pultrusion process from a glass fiber yarn bundle, the density of the composite material of the glass fiber yarn bundle is assumed to be rho, the modulus is assumed to be E, and the price per kg is P.
The equivalent modulus of the section of the structural part 1 is about 0.075E, and the density of the structural part 1 is about 0.075 rho. The Balsa wood resin infusion had a density of about 0.15 p and a long-direction modulus of about 0.0026E for use on the blade. The price per cube of this structural member 1, after replacement of the core material, is 0.075 ρ P, while the price per cube of Balsa wood is about 0.2 ρ P.
From the above data, it can be seen that the following effects can be achieved by using the structural member 1 instead of the large-thickness blade shell core material Balsa: firstly, the weight of the blade core material can be greatly reduced, and for the large-thickness Balsa wood core material, the weight can be reduced by about 50% after the structural member 1 is used for replacement; secondly, the cost of the blade is reduced by more than 60 percent; the buckling resistance of the core material area of the blade is greatly improved, the examples show that the modulus in the length direction of the blade can be improved by more than 28 times, and the modulus is in direct proportion to the buckling resistance, so that the corresponding buckling resistance can be greatly improved; fourthly, the manufacturability is good, the surface with the radian can ensure that the structural part 1 is well attached to the surface of the blade mould, the grooves 102 in the length direction and the grooves 101 in the height direction formed by chamfering the corner points of the cross section are designed to form a blade resin pouring flow channel, and the manufacturability is good.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
In the description of the present invention, it is to be understood that the terms "center," "height," "thickness," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
While the present invention has been described in detail with reference to the preferred embodiments, it should be understood that the above description should not be taken as limiting the invention. Various modifications and alterations to this invention will become apparent to those skilled in the art upon reading the foregoing description. Accordingly, the scope of the invention should be determined from the following claims.
Claims (14)
1. The utility model provides a structure of wind-powered electricity generation blade which characterized in that, this structure is laid between the main bearing structure of wind-powered electricity generation blade, includes: a first sidewall, a second sidewall disposed opposite the first sidewall, a third sidewall disposed adjacent to both the first sidewall and the second sidewall, a fourth sidewall disposed opposite the third sidewall, the fourth sidewall disposed adjacent to both the first sidewall and the second sidewall,
the third side wall and the fourth side wall on the cross section of the structural member are both arcs, the arc directions of the two arcs are consistent,
the extending surfaces of the first side wall and the second side wall in the same extending direction form an included angle;
the structural member is integrally of a long strip hexahedral structure with two closed ends, and the interior of the structural member is hollow.
2. The structural member of a wind turbine blade according to claim 1, wherein the angle x of the included angle has a value range of: x is more than or equal to 0.5 degrees and less than or equal to 2.5 degrees.
3. The structural member of a wind turbine blade as claimed in claim 1, wherein a plurality of grooves are provided on at least one of the first side wall to the fourth side wall at intervals.
4. The structural member of a wind turbine blade according to claim 3, wherein a plurality of the grooves are spaced apart from each other on the first side wall and the second side wall, and each of the grooves extends along a height direction of the corresponding first side wall and the corresponding second side wall.
5. The structural member for a wind turbine blade according to claim 1, wherein a chamfer is provided at each of four corners of the cross section of the structural member.
6. The structural member of a wind turbine blade according to claim 1, wherein the radius of the circular arc is designed according to the curvature of the blade mold, and the smaller the curvature of the blade mold, the larger the radius of the circular arc.
7. The structural member of a wind turbine blade according to claim 6, wherein the radius of the circular arc is greater than or equal to D/2, wherein D is the radius of the root circle of the blade.
8. The structural member of a wind turbine blade according to claim 1, further comprising a plurality of ribs disposed inside the structural member.
9. The structural member of a wind turbine blade according to claim 1, wherein the structural member is formed by a pultrusion process using a bundle of glass fiber yarns.
10. The preparation method of the structural member of the wind power blade is characterized by comprising the following steps of:
step S1: according to the design paper of the structural member of the wind power blade as defined in any one of claims 1 to 9, a mold of the structural member is manufactured;
step S2: manufacturing four side walls of the hexahedral structure of the pultruded glass fiber composite material by using a pultrusion process according to the mold of the structural member to form a pultruded structural member;
step S3: and sealing edges at two ends of the pultrusion structural member to form the structural member.
11. The method for preparing the structural member of the wind turbine blade according to claim 10, wherein the mold for the structural member is manufactured according to the design drawing of the structural member of the wind turbine blade according to any one of claims 3 to 4, and the manufacturing tool for the groove is added to a position where solidification is not completed after the pultruded structural member is taken out of the mold, so as to form the groove.
12. A preparation method of a wind power blade shell is characterized by comprising the following steps:
step T1: pre-obtaining a blade shell mould, and a plurality of structural members according to any one of claims 1-9;
step T2: laying a composite fabric cloth layer in the blade shell mould;
step T3: a plurality of same structural members are laid in the area of the blade core material;
step T4: and (4) after all layers of the blade are laid, resin is poured, and the blade shell is formed after the resin is cured.
13. The method for manufacturing a wind turbine blade shell according to claim 12, wherein the length direction of the laid structural member is identical or nearly identical to the length direction of the blade.
14. A wind turbine blade, characterized in that the shell of the wind turbine blade is prepared by applying the preparation method of the wind turbine blade shell according to any one of claims 12 to 13.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114571714A (en) * | 2022-02-07 | 2022-06-03 | 常州市新创智能科技有限公司 | Core material combined type composite material wind power blade and manufacturing method thereof |
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| CN101666290A (en) * | 2009-10-14 | 2010-03-10 | 黄争鸣 | Wind turbine blade structure, processing and forming method and applications thereof |
| CN109732951A (en) * | 2019-03-04 | 2019-05-10 | 上伟（江苏）碳纤复合材料有限公司 | A kind of wind electricity blade pultrusion enhancing plate and its manufacturing method conducive to resin flowing |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101666290A (en) * | 2009-10-14 | 2010-03-10 | 黄争鸣 | Wind turbine blade structure, processing and forming method and applications thereof |
| CN109732951A (en) * | 2019-03-04 | 2019-05-10 | 上伟（江苏）碳纤复合材料有限公司 | A kind of wind electricity blade pultrusion enhancing plate and its manufacturing method conducive to resin flowing |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114571714A (en) * | 2022-02-07 | 2022-06-03 | 常州市新创智能科技有限公司 | Core material combined type composite material wind power blade and manufacturing method thereof |
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Application publication date: 20211207 |