CN114474792A - Manufacturing method of fan blade, fan blade and wind turbine generator - Google Patents
Manufacturing method of fan blade, fan blade and wind turbine generator Download PDFInfo
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- CN114474792A CN114474792A CN202210168498.7A CN202210168498A CN114474792A CN 114474792 A CN114474792 A CN 114474792A CN 202210168498 A CN202210168498 A CN 202210168498A CN 114474792 A CN114474792 A CN 114474792A
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- 238000009787 hand lay-up Methods 0.000 claims description 16
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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
- B29C70/68—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
- B29C70/681—Component parts, details or accessories; Auxiliary operations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B11/00—Making preforms
- B29B11/14—Making preforms characterised by structure or composition
- B29B11/16—Making preforms characterised by structure or composition comprising fillers or reinforcement
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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
- B29C70/68—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
- B29C70/86—Incorporated in coherent impregnated reinforcing layers, e.g. by winding
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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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The application provides a manufacturing method of a fan blade, the fan blade and a wind turbine generator. The manufacturing method of the fan blade comprises the following steps: forming at least two sections of sectional blades, and abutting the opposite connecting parts of the two adjacent sections of sectional blades in the axial direction of the sectional blades; and forming a connecting plate on the surface of the opposite connecting part, wherein the connecting plate and the opposite connecting part are connected into an integral structure, and the connecting plate is matched with the wing profiles of two adjacent sections of the segmented blades. The fan blade comprises a multi-segment blade, and the multi-segment blade is manufactured by the manufacturing method of the fan blade. The wind turbine generator comprises a tower, an engine room and a wind wheel. The nacelle is mounted on a tower. The wind turbine is mounted to the nacelle. The wind wheel comprises a rotatable hub and at least one fan blade as described above, which is mounted to the hub. The fan blade manufactured by the manufacturing method is more reliable, meets the strength requirement, and cannot cause the weight increase of the fan blade.
Description
Technical Field
The application relates to the technical field of wind power generation, in particular to a manufacturing method of a fan blade, the fan blade and a wind turbine generator.
Background
As the blades of wind turbines are designed to be longer and longer, the cost and difficulty of their transportation increases significantly. In order to reduce the difficulty of transportation and greatly save the transportation cost, the sectional blade is the subsequent main development trend. In the related art, the outer sides of the blades are connected through bolts, a plurality of holes are formed in the blades, the strength of the blades is lost to a certain degree, meanwhile, the weight of the bolted areas is increased greatly, and the weight and the cost of the blades are increased.
Disclosure of Invention
The application provides an improved fan blade manufacturing method, a fan blade and a wind turbine.
The embodiment of the application provides a manufacturing method of a fan blade, comprising the following steps:
forming at least two sections of sectional blades, and abutting the opposite connecting parts of the two adjacent sections of sectional blades in the axial direction of the sectional blades; and
and forming a connecting plate on the surface of the opposite connecting part, wherein the connecting plate and the opposite connecting part are connected into an integral structure, and the connecting plate is matched with the wing profiles of two adjacent sections of the segmented blades.
Optionally, the forming a connecting plate on the surface of the opposite connecting portion includes:
forming a first prefabricated plate on the surface of the opposite connecting part; wherein the first prefabricated plate at least wraps the butt joint of the opposite connecting parts in the chord direction of the segmented blade.
Optionally, the forming a connecting plate on the surface of the opposite connecting portion includes:
forming a second prefabricated plate, assembling the second prefabricated plate on the outer peripheral wall of the first prefabricated plate, and enclosing the second prefabricated plate and the first prefabricated plate to form an accommodating cavity;
and forming a material layer in the accommodating cavity, and heating the material layer to connect the first prefabricated plate, the second prefabricated plate and the opposite connecting parts into an integral structure so as to form the connecting plate.
Optionally, the forming a second prefabricated panel, assembling the second prefabricated panel to the outer peripheral wall of the first prefabricated panel, and enclosing the second prefabricated panel with the first prefabricated panel to form a receiving cavity, includes:
respectively forming a first sub prefabricated plate, a second sub prefabricated plate, a third sub prefabricated plate and a fourth sub prefabricated plate;
assembling the first sub prefabricated panels on a suction surface of the sectional blade, assembling the second sub prefabricated panels on a pressure surface of the sectional blade, assembling the third sub prefabricated panels on a front edge die-closing seam area of the sectional blade and assembling the fourth sub prefabricated panels on a rear edge die-closing seam area of the sectional blade; the first sub precast slab, the second sub precast slab, the third sub precast slab and the fourth sub precast slab are connected end to form the second precast slab, the second precast slab is wrapped on the outer peripheral wall of the first precast slab and is enclosed with the first precast slab to form the accommodating cavity.
Optionally, after the forming of the first sub prefabricated panel, the second sub prefabricated panel, the third sub prefabricated panel and the fourth sub prefabricated panel, the forming of the accommodating cavity includes:
forming a support panel; wherein the support panel is adapted to the airfoil profile of the suction surface of the segmented blade;
laying a vacuum film, a glue injection pipe, a flow guide net, an isolating film, demoulding cloth and the first sub prefabricated plate on the supporting panel in sequence;
transferring the support panel, the laid vacuum film, the glue injection pipe, the flow guide net, the isolating film, the demolding cloth and the first sub prefabricated panel to the opposite connecting parts so as to support the suction surfaces of the segmented blades of the opposite connecting parts;
laying the second sub prefabricated plates on the pressure surfaces of the segmented blades of the opposite connecting parts;
placing the third sub prefabricated plate in a front edge die-closing seam area of the segmented blade of the opposite connecting part, and mutually overlapping the first sub prefabricated plate and the second sub prefabricated plate;
placing the fourth sub prefabricated plate in a rear edge die-closing seam area of the segmented blade of the opposite connecting part, and mutually overlapping the first sub prefabricated plate and the second sub prefabricated plate;
the vacuum film, the glue injection pipe, the flow guide net, the isolation film and the demolding cloth are laid on the suction surfaces of the sectional blades of the opposite connecting parts, the glue injection pipe, the flow guide net, the isolation film and the demolding cloth are turned over to the pressure surfaces of the sectional blades of the opposite connecting parts, and the vacuum film is sealed by using a sealing rubber strip to form the accommodating cavity.
Optionally, the forming a second prefabricated panel, assembling the second prefabricated panel to the outer peripheral wall of the first prefabricated panel, and enclosing the second prefabricated panel with the first prefabricated panel to form a receiving cavity, includes:
forming a third sub prefabricated plate and a fourth sub prefabricated plate;
forming a support panel; wherein the support panel is adapted to the airfoil profile of the suction surface of the segmented blade;
laying a vacuum film, a glue injection pipe, a flow guide net, an isolation film, demoulding cloth and a glass fiber material on the supporting panel in sequence;
transferring the support panel, the laid vacuum film, the glue injection pipe, the flow guide net, the isolation film, the release cloth and the glass fiber material to the opposite connecting parts so as to support the suction surfaces of the segmented blades of the opposite connecting parts;
paving glass fiber materials on the pressure surfaces of the segmented blades of the opposite connecting parts;
placing the third sub prefabricated plate in the front edge mold-closing seam area of the segmented blades of the opposite connecting parts, and mutually lapping with the laid glass fiber materials;
placing the fourth sub prefabricated plate in a rear edge die-closing seam area of the segmented blades of the opposite connecting parts, and mutually lapping the fourth sub prefabricated plate with the laid glass fiber materials;
the vacuum film, the glue injection pipe, the flow guide net, the isolation film and the demolding cloth are laid on the suction surfaces of the sectional blades of the opposite connecting parts, the glue injection pipe, the flow guide net, the isolation film and the demolding cloth are turned over to the pressure surfaces of the sectional blades of the opposite connecting parts, and the vacuum film is sealed by using a sealing rubber strip to form the accommodating cavity.
Optionally, the forming a material layer in the accommodating cavity, and performing a heat treatment on the material layer to connect the first prefabricated panel, the second prefabricated panel and the opposite connecting portions into the integrated structure to form the connecting plate includes:
providing a vacuum pump and a perfusion pipeline connected with the vacuum pump, and connecting the vacuum pump and the perfusion pipeline with the accommodating cavity;
controlling the vacuum pump to pump air out of the accommodating cavity until the vacuum filling pressure of the accommodating cavity is met;
injecting the material of the material layer into the accommodating cavity through the filling pipeline to form the material layer;
heating the material of the material layer in the accommodating cavity, and solidifying the material of the material layer, the first prefabricated plate, the second prefabricated plate and the opposite connecting parts to form the integral structure;
and cooling the formed integrated structure, removing the vacuum film, the glue injection pipe, the flow guide net, the isolation film and the demolding cloth after cooling, and finishing and flattening the surface of the integrated structure.
Optionally, the leading edge joint area and the trailing edge joint area of the segmented vane are arranged oppositely along the chord direction of the segmented vane.
Optionally, the suction surface and the pressure surface of the segmented blade are arranged opposite to each other in a direction perpendicular to the chordwise direction of the segmented blade.
Optionally, the pressure surface of the segmented blade is the wind receiving surface of the segmented blade.
Optionally, the suction surface of the segmented blade is a leeward surface of the segmented blade.
Optionally, the first sub-prefabricated plate is adapted to an airfoil shape of a suction surface of the segmented blade.
Optionally, the second sub-prefabricated plate is adapted to an airfoil profile of the pressure surface of the segmented blade.
Optionally, the third sub-prefabricated plate is adapted to an airfoil profile of a leading edge mold-closing gap area of the segmented blade.
Optionally, the fourth sub-prefabricated plate is adapted to an airfoil profile of a trailing edge mold-closing gap area of the segmented blade.
Optionally, the first sub-prefabricated panel is formed by using a vacuum infusion process or a hand lay-up forming process.
Optionally, the second sub-prefabricated panel is formed by using a vacuum infusion process or a hand lay-up forming process.
Optionally, the third sub-prefabricated panel is formed by using a vacuum infusion process or a hand lay-up forming process.
Optionally, the fourth sub-prefabricated panel is formed by using a vacuum infusion process or a hand lay-up forming process.
Optionally, the materials of the first prefabricated plate and the second prefabricated plate comprise glass fiber materials; the material of the material layer includes a resin material.
Optionally, the thickness of the first prefabricated plate ranges from 4mm to 5 mm.
Optionally, the weight ratio of the glass fiber material to the resin material is at least 7: 3.
optionally, the glass fiber material comprises biaxial woven cloth or uniaxial woven cloth or triaxial woven cloth.
Optionally, the resin material includes epoxy resin or vinyl resin or epoxy vinyl resin or light-cured resin.
Optionally, after the forming of the at least two segments of segmented blades, before the abutting of the opposite connecting portions of two adjacent segments of segmented blades, the manufacturing method further includes:
providing a fixed support for supporting the segmented blade;
placing the formed at least two segments of the segmented blades on the fixing bracket, and keeping the pressure surfaces of the segmented blades upward; and the pressure surface of the segmented blade is the wind receiving surface of the segmented blade.
Optionally, the forming at least two segments of segmented blades includes: the at least two segments of segmented vanes are formed using a vacuum infusion process.
The embodiment of the application provides a fan blade, which comprises a multi-segment segmented blade, wherein the multi-segment segmented blade is manufactured by using the manufacturing method of the fan blade.
The embodiment of the application provides a wind turbine generator, which comprises a tower, an engine room and a wind wheel; a nacelle is mounted on the tower; the wind wheel is arranged on the engine room; the wind wheel comprises a rotatable hub and at least one fan blade as described above, which fan blade is mounted to the hub.
According to the manufacturing method of the fan blade, at least two sections of sectional blades are formed firstly, the opposite connecting parts of the two adjacent sections of sectional blades are abutted, the connecting plates are formed on the surfaces of the opposite connecting parts, and the connecting plates and the opposite connecting parts are connected into an integral structure. The fan blade manufactured by the manufacturing method is more reliable, meets the strength requirement, and cannot cause the weight increase of the fan blade.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of a wind turbine generator according to the present application.
Fig. 2 is a schematic structural view of a segmented blade of a fan blade of the wind turbine shown in fig. 1.
Fig. 3 is a schematic structural diagram illustrating a connection of segmented blades of a fan blade of the wind turbine generator shown in fig. 2.
Fig. 4 shows a schematic cross-sectional view at a of the connection of the segmented blades of the fan blade of the wind turbine shown in fig. 3.
FIG. 5 is a flow chart illustrating steps of one embodiment of a method of manufacturing a fan blade according to the present application.
FIG. 6 is a flowchart illustrating one embodiment of step S1 of the method of manufacturing the fan blade of FIG. 5.
FIG. 7 is a flowchart illustrating one embodiment of step S2 of the method of manufacturing the fan blade of FIG. 5.
FIG. 8 is a flowchart illustrating one embodiment of step S2 of the method of manufacturing the fan blade of FIG. 5.
FIG. 9 is a flowchart illustrating one embodiment of step S22 of the method of manufacturing the fan blade of FIG. 8.
FIG. 10 is a flowchart illustrating one embodiment of step S222 of the method of manufacturing the fan blade of FIG. 9.
FIG. 11 is a flowchart illustrating one embodiment of step S23 of the method of manufacturing the fan blade of FIG. 8.
Fig. 12 is a flowchart illustrating another embodiment of step S2 of the method for manufacturing a fan blade shown in fig. 5.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus consistent with certain aspects of the present application, as detailed in the appended claims.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs. The use of the terms "a" or "an" and the like in the description and in the claims of this application do not denote a limitation of quantity, but rather denote the presence of at least one. "plurality" includes two, and is equivalent to at least two. The word "comprising" or "comprises", and the like, means that the element or item appearing before "comprises" or "comprising" covers the element or item listed after "comprising" or "comprises" and its equivalents, and does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. As used in this specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
The application provides a manufacturing method of a fan blade, the fan blade and a wind turbine generator. The manufacturing method of the fan blade comprises the following steps: forming at least two sections of sectional blades, and abutting the opposite connecting parts of the two adjacent sections of sectional blades in the axial direction of the sectional blades; and forming a connecting plate on the surface of the opposite connecting part, wherein the connecting plate and the opposite connecting part are connected into an integral structure, and the connecting plate is matched with the wing profiles of two adjacent sections of the segmented blades. The fan blade comprises a multi-segment blade, and the multi-segment blade is manufactured by the manufacturing method of the fan blade. The wind turbine generator comprises a tower, an engine room and a wind wheel. The nacelle is mounted on a tower. The wind turbine is mounted to the nacelle. The wind wheel comprises a rotatable hub and at least one fan blade as described above, which is mounted to the hub. The fan blade manufactured by the manufacturing method is more reliable, meets the strength requirement, and cannot cause the weight increase of the fan blade.
The application provides a manufacturing method of a fan blade, the fan blade and a wind turbine generator. The following describes a method for manufacturing a fan blade, and a wind turbine generator in detail with reference to the accompanying drawings. The features of the following examples and embodiments may be combined with each other without conflict.
Fig. 1 is a schematic structural diagram of an embodiment of a wind turbine generator 10 according to the present application. As shown in fig. 1, the wind turbine 10 includes a tower 11, a nacelle 12 mounted on the tower 11, and a rotor 13 mounted on the nacelle 12. Wind rotor 13 includes a rotatable hub 131 and at least one fan blade 132. The fan blades 132 are mounted to the hub 131 and extend outwardly from the hub 131. In the embodiment shown in FIG. 1, wind rotor 13 includes a plurality of fan blades 132, three of which are shown in FIG. 1 for illustration. A plurality of fan blades 132 may be spaced about hub 131 to facilitate rotating wind rotor 13 to enable wind energy to be converted into usable mechanical energy, and subsequently, electrical energy.
Fig. 2 shows a schematic structural view of a segmented blade 133 of the fan blade 132 of the wind turbine 10 shown in fig. 1. Fig. 3 is a schematic structural diagram illustrating the connection of the segmented blades 133 of the fan blade 132 of the wind turbine 10 shown in fig. 2. Fig. 4 shows a schematic cross-sectional view at a of the wind turbine 10 shown in fig. 3, where the segmented blades 133 of the fan blade 132 are connected. As shown in fig. 2-4, fan blade 132 includes a multi-segment segmented blade 133. The segmented blades 133 are interconnected to form the fan blade 132 (shown in FIG. 3). In the embodiment shown in FIG. 2, only two segments of segmented vanes 133 are shown. And are not limited in this application.
As the installation location of the wind turbine 10 is relatively remote, the cost and difficulty of transporting the wind turbine 10 increases significantly as the fan blades 132 are longer and longer. In this embodiment, the segmented blades 133 are first transported to the installation site, then the fan blades 132 are formed by quick-coupling using the manufacturing method of the fan blades 132, and then further installed. So set up, can reduce the transportation degree of difficulty and cost.
The method of manufacturing the fan blade 132 is described with particular reference to the embodiment shown in fig. 5-11.
FIG. 5 is a flow chart illustrating steps of one embodiment of a method of manufacturing a fan blade 132 of the present application. As shown in FIG. 5, the method of manufacturing the fan blade 132 includes steps S1-S2. Wherein the content of the first and second substances,
step S1, at least two segments of segmented vanes 133 are formed (as shown in fig. 2). In some embodiments, at least two segments of segmented vanes 133 are formed using a vacuum infusion process. The airfoils of two adjacent segmented blades 133 are formed to fit. After at least two stages of the segmented blades 133 are formed, the opposing connection portions of the adjacent two stages of the segmented blades 133 are abutted in the axial direction of the segmented blades 133. In the embodiment shown in fig. 3, the axial direction of the segmented vane 133 is indicated by X1. In the axial direction X1 of the segmented vane 133, the abutting connections have a small clearance.
In step S2, a connection plate 134 is formed on the surface of the opposite connection portion, and the connection plate 134 and the opposite connection portion are connected to form an integral structure (as shown in fig. 3). In some embodiments, the webs 134 are formed on the surfaces of the opposing connections using a vacuum infusion process. The connecting plate 134 first makes up the gap between the abutting connecting portions and then is integrally connected to the connecting portions of the sectional blades 133. Wherein the connecting plate 134 is formed to fit the airfoil profile of the adjacent two segmented blades 133.
Compared with the related art, the fan blade manufactured by the manufacturing method is more reliable and meets the strength requirement. And the additional arrangement of a fixing structure is not needed, so that the weight and the cost of the fan blade can be reduced.
Further, fig. 6 is a flowchart illustrating a step S1 of the manufacturing method of the fan blade 132 illustrated in fig. 5. As shown in fig. 6, after the at least two stages of the segment blades 133 are formed, the manufacturing method further includes steps S11 to S12 before the opposing connection portions of the adjacent two stages of the segment blades 133 are abutted. Wherein the content of the first and second substances,
step S11, a fixing bracket (not shown) is provided to support the segmented blade 133. The sectional blades 133 are supported by the fixed support, and when the sectional blades 133 are connected, dislocation is not easy to occur, and stability is better.
At step S12, the at least two segments of the segmented blade 133 are placed on the fixing bracket, and the pressure surface 1331 of the segmented blade 133 is kept upward. In some embodiments, segmented blade 133 includes a pressure surface 1331 and a suction surface 1332. The suction surface 1332 of the segmented blade 133 is disposed opposite the pressure surface 1331 in a direction perpendicular to the chordwise direction of the segmented blade 133 (as shown in FIG. 4). In the embodiment shown in FIG. 4, the chordwise direction of the segmented blade 133 is indicated by X2. The chordwise direction X2 of the segmented vane 133 lies in the same plane as the axial direction X1, and the chordwise direction X2 of the segmented vane 133 is perpendicular to the axial direction X1. The suction surface 1332 and the pressure surface 1331 of the segmented vane 133 are disposed in a plane perpendicular to the plane of X1-X2.
In the present embodiment, the pressure surface 1331 of the segmented blade 133 is the wind receiving surface of the segmented blade 133. The suction surface 1332 of the segmented blade 133 is the leeward surface of the segmented blade 133. In the chordwise direction X2 of the segmented vane 133, the arc of the pressure surface 1331 of the segmented vane 133 is greater than the arc of the suction surface 1332 of the segmented vane 133 (as shown in fig. 4). When the segmented blade 133 is connected, the pressure surface 1331 of the segmented blade 133 is arranged upward, so that the flatness of the connecting plate 134 of the pressure surface 1331 of the formed segmented blade 133 is better, and the connecting plate 134 is formed conveniently.
Further, fig. 7 is a flowchart illustrating a step S2 of the manufacturing method of the fan blade 132 illustrated in fig. 5. As shown in fig. 7, the connection plates 134 are formed on the surfaces of the opposite connection parts, including step S21. Wherein the content of the first and second substances,
step S21, a first prefabricated panel (not shown) is formed on the surface of the opposite connection portion. In some embodiments, the material of the first preformed sheet comprises fiberglass material. And paving glass fiber materials on the surfaces of the opposite connecting parts to pre-connect the gaps of the opposite connecting parts. In some embodiments, the first prefabricated panel wraps at least the butt joint of the opposite connection portions in the chordwise direction of the sectional blade 133. In this embodiment, the first prefabricated panel wraps at least a gap at the butt joint of the opposite connection parts in the chordwise direction of the sectional blade 133. The fiberglass material circumferentially wraps the pressure side 1331 and the suction side 1332 of the segmented blade 133 in a blade chordwise direction. So set up, can make the connectivity of two sections adjacent segmented vane 133 better.
In some embodiments, the first preformed sheet is formed using a vacuum infusion process or a hand lay-up molding process. The first prefabricated panel should not be too thick or too thin in thickness. As the sectional blades 133 are arc-shaped in the chord direction of the blades, the glass fiber material of the first prefabricated plate is softer and is too thick, so that wrinkles are easily formed, and the flatness is affected. Too thin to function as a pre-join. In some embodiments, the first preform has a thickness in a range from 4mm to 5 mm. In some embodiments, the thickness of the first preform may be 4mm or 4.5mm or 5mm, with a preferred value of 4.5 mm. In this embodiment, the first prefabricated panel is formed by using a hand lay-up forming process, and the number of hand lay-up layers of the glass fiber material is less than 5. So set up, guarantee that the surface smoothness of glass fiber material is better.
Further, fig. 8 is a flowchart illustrating a step S2 of the manufacturing method of the fan blade 132 illustrated in fig. 5. As shown in FIG. 8, the formation of the link plates 134 on the surfaces of the opposite link portions includes steps S22-S23. Wherein the content of the first and second substances,
step S22, the second prefabricated panel 135 is formed. In some embodiments, the second preformed sheet 135 is formed using a vacuum infusion process or a hand lay-up molding process. After the second prefabricated panel 135 is formed, the second prefabricated panel 135 is assembled to the outer circumferential wall of the first prefabricated panel to wrap the first prefabricated panel and enclose the first prefabricated panel to form a receiving chamber 136.
Step S23, a material layer (not shown) is formed in the receiving cavity 136, the material layer is sufficiently contacted with the first and second prefabricated panels 135, and the material layer is heat-treated to be integrally connected with the first and second prefabricated panels 135 and the opposite connecting portions to form the connecting plate 134.
In some embodiments, the material of the second preformed sheet 135 comprises fiberglass material. In some embodiments, the material of the material layer comprises a resin material. The resin material is fully contacted with the glass fiber material, and the glass fiber material is heated to form the glass fiber reinforced plastic. The glass fiber reinforced plastic is light and hard, non-conductive, stable in performance, high in mechanical strength and corrosion resistant. The segmented blades 133 are connected by the glass fiber reinforced plastics, so that the connection is more reliable and stable.
The glass fiber materials are firstly paved at the opposite connecting parts, then the resin materials are formed on the surfaces of the glass fiber materials, and the surfaces of the resin materials are wrapped by one layer of glass fiber materials. The glass fiber reinforced plastic formed by the method is integrally formed with the opposite connecting parts of the segmented blades 133, so that the connection is more reliable. Compared with the prior art, no hole is needed on the sectional blade 133, the strength requirement is met, an additional connecting structure is not needed, and the weight and the cost of the fan blade are reduced. In some embodiments, the weight ratio of the fiberglass material to the resin material is at least 7: 3. so set up, guarantee that the glass steel that forms satisfies the hardness requirement.
In some embodiments, the fiberglass material is a woven cloth of reinforcing fibers. In some embodiments, the fiberglass material comprises a biaxially woven cloth or a uniaxially woven cloth or a triaxial woven cloth. In some embodiments, the fiberglass material has a weight of 600gsm to 1500 gsm. By providing a suitable weight of fiberglass material, rigidity and hardness can be enhanced. In some embodiments, the resin material comprises an epoxy or vinyl or epoxy vinyl or a light curable resin. In the present embodiment, the resin material is a light-curable resin, and the curing speed of the light-curable resin is higher than that of other resin materials.
Further, fig. 9 is a flowchart illustrating a step S22 of the manufacturing method of the fan blade 132 illustrated in fig. 8. As shown in fig. 9, the second prefabricated panel 135 is formed and assembled to the outer circumferential wall of the first prefabricated panel 135 to form the receiving cavity 136 by being surrounded with the first prefabricated panel, including steps S221 to S222. Wherein the content of the first and second substances,
step S221 of forming the first sub pre-fabricated panel 1351, the second sub pre-fabricated panel 1352, the third sub pre-fabricated panel 1353, and the fourth sub pre-fabricated panel 1354, respectively. In some embodiments, the first sub-prefabricated panels 1351 are formed using a vacuum infusion process or a hand lay-up molding process. In some embodiments, the second sub-prefabricated panels 1352 are formed using a vacuum infusion process or a hand lay-up molding process. In some embodiments, the third sub-prefabricated panels 1353 are formed using a vacuum infusion process or a hand lay-up molding process. In some embodiments, the fourth sub-prefabricated panels 1354 are formed using a vacuum infusion process or a hand lay-up molding process.
Step S222, assembling the first sub prefabricated panels 1351 to the suction surface 1332 of the sectional blade 133, assembling the second sub prefabricated panels 1352 to the pressure surface 1331 of the sectional blade 133, assembling the third sub prefabricated panels 1353 to the leading edge mold-closing seam area 1333 of the sectional blade 133, and assembling the fourth sub prefabricated panels 1354 to the trailing edge mold-closing seam area 1334 of the sectional blade 133 (as shown in fig. 4). In the embodiment shown in fig. 4, the leading edge pinch seam region 1333 and the trailing edge pinch seam region 1334 of the segmented blade 133 are disposed opposite to each other in the chordwise direction X2 of the segmented blade 133. The first sub prefabricated panel 1351, the second sub prefabricated panel 1352, the third sub prefabricated panel 1353 and the fourth sub prefabricated panel 1354 are connected end to form the second prefabricated panel 135, and the second prefabricated panel 135 is wrapped around the outer circumferential wall of the first prefabricated panel to form the accommodating cavity 136 by being surrounded with the first prefabricated panel.
The fan blades have a more complex aerodynamic shape and are more complex in shape. The second prefabricated panel 135 is complicated to form and separate the second prefabricated panel 135 into the first sub-prefabricated panel 1351, the second sub-prefabricated panel 1352, the third sub-prefabricated panel 1353 and the fourth sub-prefabricated panel 1354, and thus the separate formation and separate assembly of the first, second, third and fourth sub-prefabricated panels 1351, 1352, 1353 and 1354 can reduce the difficulty of formation and assembly.
Further, fig. 10 is a flowchart illustrating a step S222 of the manufacturing method of the fan blade 132 illustrated in fig. 9. As shown in FIG. 10, after the first sub prefabricated panels 1351, the second sub prefabricated panels 1352, the third sub prefabricated panels 1353 and the fourth sub prefabricated panels 1354 are formed, the housing chamber 136 is formed, including steps S2221 to S2227. Wherein the content of the first and second substances,
step S2221, the support panel 137 is formed. Wherein the support panel 137 provides a support surface for supporting the suction surface 1332 at the opposite connection. At the opposite connection, depending on the profile of the segmented vane 133, a support panel 137 is made that follows the suction surface 1332 of the segmented vane 133. In some embodiments, the supporting panel 137 is made of glass fiber reinforced plastic formed by curing glass fiber material and epoxy resin. The support panel 137 has a certain thickness and a curvature of a blade profile to be adapted to the airfoil shape of the suction surface 1332 of the segment blade 133. The blade is not easy to deform and can play a supporting role, and the blade can cover the joint of the blade in size.
Step S2222, a vacuum film (not shown), a glue injection pipe (not shown), a flow guide net (not shown), a separation film (not shown), a release fabric (not shown), and the first sub prefabricated panel 1351 are sequentially laid on the support panel 137. In this embodiment, the vacuum film, the glue injection pipe, the flow guide net, the isolation film, the release cloth, and the second sub-prefabricated board 1352 are sequentially laid flat. In some embodiments, the first sub-prefabricated panels 1351 are adapted to the airfoil shape of the suction surface 1332 of the segmented blade 133.
Step S2223, the support panel 137, and the laid vacuum film, glue injection pipe, flow guide net, barrier film, release cloth, and first sub prefabricated panel 1351 are transferred to the opposite connection portion to support the suction surface 1332 of the segment blade 133 of the opposite connection portion. In this embodiment, the support panel 137, and the laid vacuum film, the glue injection tube, the flow guide net, the separation film, the release fabric, and the second subsidiary prefabricated panels 1352 are transferred to the opposite connection portion in preparation for forming the receiving cavity 136.
Step S2224, the second subsidiary prefabricated panels 1352 are laid on the pressure surfaces 1331 of the coupled section blades 133. In some embodiments, the second sub-prefabricated panel 1352 is fitted to the airfoil profile of the pressure surface 1331 of the segmented blade 133.
Step S2225, a third sub-prefabricated panel 1353 is placed at the front edge matched-seam area 1333 of the segment blade 133 at the opposite connection portion and overlapped with the laid first and second sub-prefabricated panels 1351 and 1352. In some embodiments, the third sub pre-fabricated panel 1353 conforms to the airfoil shape of the leading edge co-molded slot region 1333 of the segmented vane 133.
Step S2226, a fourth sub-prefabricated panel 1354 is placed at the rear edge matched-seam area 1334 of the opposite connected sectional blade 133 and overlapped with the laid first and second sub-prefabricated panels 1351 and 1352. In some embodiments, the fourth sub-prefabricated panels 1354 are fitted to the airfoil profile of the trailing edge pinch-seam region 1334 of the segmented blade 133.
Step S2227 is to fold the vacuum film, the glue injection pipe, the flow guiding net, the isolation film, and the release cloth, which are laid on the suction surface 1332 of the segment blade 133 of the opposite connection portion, over to the pressure surface 1331 of the segment blade 133 of the opposite connection portion, and to seal the vacuum film by using the sealing tape, thereby forming the accommodation cavity 136. The receiving cavity 136 is a closed cavity.
In the above-described embodiment, the first sub pre-fabricated panel 1351, the second sub pre-fabricated panel 1352, the third sub pre-fabricated panel 1353 and the fourth sub pre-fabricated panel 1354 are overlapped in staggered fashion to ensure the flatness of the surface of the formed second pre-fabricated panel 135.
Further, fig. 11 is a flowchart illustrating a step S23 of the manufacturing method of the fan blade illustrated in fig. 8. As shown in fig. 11, forming a material layer in the receiving cavity 136 and heat-treating the material layer to connect the first prefabricated panel, the second prefabricated panel 135 and the opposite connecting portion into an integrated structure to form the connecting plate 134 includes steps S231-S235. Wherein, the first and the second end of the pipe are connected with each other,
step S231, providing a vacuum pump (not shown) and a perfusion line (not shown) connected to the vacuum pump, and connecting the vacuum pump and the perfusion line to the accommodating cavity 136. In the present embodiment, the vacuum pump and the filling pipeline are connected to the receiving cavity 136 to form a vacuum filling path for the vacuum filling process.
Step S232, controlling the vacuum pump to pump the accommodating cavity 136 until the vacuum filling pressure of the accommodating cavity 136 is satisfied. In this embodiment, the controller controls the vacuum pump to turn on the vacuum pump, so that the vacuum pump can pump the gas in the accommodating cavity 136 to form a negative pressure in the accommodating cavity 136, and the vacuum pump continues to pump the gas until the external gas pressure is pumped to press the external resin material into the accommodating cavity 136. It should be noted that the vacuum filling pressure in the receiving cavity 136 may be designed according to actual requirements, and is not limited in this application.
In step S233, the material of the material layer is injected into the accommodating cavity 136 through the filling pipeline to form the material layer. The material of the material layer is pressed into the receiving cavity 136 by the atmospheric pressure of the outside to form the material layer.
Step S234, heating the material of the material layer in the receiving cavity 136, so that the material of the material layer, the first prefabricated plate, the second prefabricated plate 135 and the opposite connecting parts are solidified into an integral structure. The material of the material layer is a resin material. The first prefabricated plate and the second prefabricated plate 135 are made of glass fiber materials. The resin material is fully contacted with the glass fiber material, and the glass fiber material is heated to form the glass fiber reinforced plastic.
And S235, cooling the formed integrated structure, removing the vacuum film, the glue injection pipe, the flow guide net, the isolation film and the demolding cloth after cooling, and finishing and flattening the surface of the integrated structure. In some embodiments, segmented vanes 133 are fiberglass reinforced plastic formed by vacuum infusion of fiberglass material and resin material. The cooled connection plate 134 is made of glass fiber reinforced plastic, which is the same material as the segmented blade 133, so that the connection stability is better.
Fig. 12 is a flowchart illustrating another embodiment of step S2 of the method for manufacturing a fan blade shown in fig. 5. The method of forming the receiving cavity 136 of the embodiment shown in fig. 12 is similar to the method of forming the receiving cavity 136 of the embodiment shown in fig. 9 and 10. The main difference is that in the embodiment shown in fig. 12, the first and second sub-prefabricated panels 1351 and 1352 are not pre-formed, but are formed by annularly wrapping and laying a glass fiber material at the junction of the pressure surface 1331 and the suction surface 1332 of the segmented blade 133 and performing infusion by vacuum pumping through a vacuum pump. The supporting panel 137 is a prefabricated glass fiber reinforced plastic plate, and is used for supporting the glass fiber material of the first sub-prefabricated plate 1351 and auxiliary materials such as a vacuum film, a glue injection pipe, a flow guide net, an isolation film and demolding cloth for perfusion. The third and fourth sub-prefabricated panels 1353 and 1354 are overlapped with the laid glass fiber material to form the second prefabricated panel 135. Compared with the embodiment shown in fig. 9 and 10, the embodiment shown in fig. 12 has a higher wing profile adaptation degree of the first and second sub-prefabricated plates 1351 and 1352 formed by the laid glass fiber materials and the pressure surface 1331 and the suction surface 1332 of the sectional blade 133, and the thickness consistency of the connecting plate formed at the connection position is better.
It should be noted that the first and second sub-prefabricated panels 1351 and 1352 may be prefabricated or may be formed during the manufacturing process. The materials for the first, second, third and fourth sub-prefabricated panels 1351, 1352, 1353 and 1354 may be glass fiber materials or heat-formed glass fiber reinforced plastics. And are not limited in this application.
In the above scheme, the connection reliability of the blades is ensured, the segmented blades 133 are formed by a vacuum infusion process, the strength and fatigue of the glass fiber reinforced plastics are verified in batches, and the structural strength of the blades can be ensured. And moreover, the vacuum infusion process is adopted, so that the operation is simple and convenient, the experience is rich, the generated defects are few, and the damage of punching the blade due to physical connection of bolts and the like is avoided. In addition, the weight increased by the glass fiber reinforced plastics forming the connecting plate 134 is also small, the weight increase at the connecting position cannot occur, so that the weight and the mass moment of the blade are not increased, and the safety margin of the wind turbine generator is prevented from being influenced. And the connecting plate 134 is made of glass fiber material and resin material, so that the cost is superior to that of physical connecting materials such as bolts.
The technical solutions disclosed in the embodiments of the present application can complement each other without generating conflicts.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the scope of protection of the present application.
Claims (15)
1. A method of manufacturing a fan blade, comprising:
forming at least two sections of sectional blades, and abutting the opposite connecting parts of the two adjacent sections of sectional blades in the axial direction of the sectional blades; and
and forming a connecting plate on the surface of the opposite connecting part, wherein the connecting plate and the opposite connecting part are connected into an integral structure, and the connecting plate is matched with the wing profiles of two adjacent sections of the segmented blades.
2. The method of manufacturing according to claim 1, wherein forming a connecting plate on a surface of the opposing connecting portions includes:
forming a first prefabricated plate on the surface of the opposite connecting part; wherein the first prefabricated plate at least wraps the butt joint of the opposite connecting parts in the chord direction of the segmented blade.
3. The method of manufacturing according to claim 2, wherein forming a connecting plate on a surface of the opposing connecting portions includes:
forming a second prefabricated plate, assembling the second prefabricated plate on the peripheral wall of the first prefabricated plate, and enclosing the second prefabricated plate and the first prefabricated plate to form an accommodating cavity;
and forming a material layer in the accommodating cavity, and heating the material layer to connect the first prefabricated plate, the second prefabricated plate and the opposite connecting parts into an integral structure so as to form the connecting plate.
4. The manufacturing method according to claim 3, wherein the forming of the second prefabricated panel and the assembling of the second prefabricated panel to the peripheral wall of the first prefabricated panel to form a housing chamber with the first prefabricated panel comprises:
respectively forming a first sub prefabricated plate, a second sub prefabricated plate, a third sub prefabricated plate and a fourth sub prefabricated plate;
assembling the first sub prefabricated panels on a suction surface of the sectional blade, assembling the second sub prefabricated panels on a pressure surface of the sectional blade, assembling the third sub prefabricated panels on a front edge die-closing seam area of the sectional blade and assembling the fourth sub prefabricated panels on a rear edge die-closing seam area of the sectional blade; the first sub prefabricated panel, the second sub prefabricated panel, the third sub prefabricated panel and the fourth sub prefabricated panel are connected end to form the second prefabricated panel, the second prefabricated panel wraps the outer peripheral wall of the first prefabricated panel and is enclosed with the first prefabricated panel to form the accommodating cavity.
5. The manufacturing method according to claim 4, wherein the forming of the receiving cavity after the forming of the first, second, third and fourth sub pre-manufactured panels includes:
forming a support panel; wherein the support panel is adapted to the airfoil profile of the suction surface of the segmented blade;
laying a vacuum film, a glue injection pipe, a flow guide net, an isolating film, demoulding cloth and the first sub prefabricated plate on the supporting panel in sequence;
transferring the support panel, the laid vacuum film, the glue injection pipe, the flow guide net, the isolating film, the demolding cloth and the first sub prefabricated panel to the opposite connecting parts so as to support the suction surfaces of the segmented blades of the opposite connecting parts;
laying the second sub prefabricated plates on the pressure surfaces of the segmented blades of the opposite connecting parts;
placing the third sub prefabricated plate in a front edge die-closing seam area of the segmented blade of the opposite connecting part, and mutually overlapping the first sub prefabricated plate and the second sub prefabricated plate;
placing the fourth sub prefabricated plate in a rear edge die-closing seam area of the segmented blade of the opposite connecting part, and mutually overlapping the first sub prefabricated plate and the second sub prefabricated plate;
the vacuum film, the glue injection pipe, the flow guide net, the isolation film and the demolding cloth are laid on the suction surfaces of the sectional blades of the opposite connecting parts, the glue injection pipe, the flow guide net, the isolation film and the demolding cloth are turned over to the pressure surfaces of the sectional blades of the opposite connecting parts, and the vacuum film is sealed by using a sealing rubber strip to form the accommodating cavity.
6. The manufacturing method according to claim 3, wherein the forming of the second prefabricated panel and the assembling of the second prefabricated panel to the peripheral wall of the first prefabricated panel to form a housing chamber with the first prefabricated panel comprises:
forming a third sub prefabricated plate and a fourth sub prefabricated plate;
forming a support panel; wherein the support panel is adapted to the airfoil profile of the suction surface of the segmented blade;
laying a vacuum film, a glue injection pipe, a flow guide net, an isolation film, demoulding cloth and a glass fiber material on the support panel in sequence;
transferring the support panel, the laid vacuum film, the glue injection pipe, the flow guide net, the isolation film, the demolding cloth and the glass fiber material to the opposite connecting parts so as to support the suction surfaces of the segmented blades of the opposite connecting parts;
paving glass fiber materials on the pressure surfaces of the segmented blades of the opposite connecting parts;
placing the third sub prefabricated plate in the front edge mold-closing seam area of the segmented blades of the opposite connecting parts, and mutually lapping with the laid glass fiber materials;
placing the fourth sub prefabricated plate in a rear edge die-closing seam area of the segmented blades of the opposite connecting parts, and mutually lapping the fourth sub prefabricated plate with the laid glass fiber materials;
the vacuum film, the glue injection pipe, the flow guide net, the isolation film and the demolding cloth are laid on the suction surfaces of the sectional blades of the opposite connecting parts, the glue injection pipe, the flow guide net, the isolation film and the demolding cloth are turned over to the pressure surfaces of the sectional blades of the opposite connecting parts, and the vacuum film is sealed by using a sealing rubber strip to form the accommodating cavity.
7. The manufacturing method as claimed in claim 5 or 6, wherein the forming of the material layer in the receiving cavity and the heat treatment of the material layer to connect the first prefabricated panel, the second prefabricated panel and the opposite connecting parts into the integrated structure to form the connecting plate comprises:
providing a vacuum pump and a perfusion pipeline connected with the vacuum pump, and connecting the vacuum pump and the perfusion pipeline with the accommodating cavity;
controlling the vacuum pump to pump air out of the accommodating cavity until the vacuum filling pressure of the accommodating cavity is met;
injecting the material of the material layer into the accommodating cavity through the filling pipeline to form the material layer;
heating the material of the material layer in the accommodating cavity, and solidifying the material of the material layer, the first prefabricated plate, the second prefabricated plate and the opposite connecting parts to form the integral structure;
and cooling the formed integrated structure, removing the vacuum film, the glue injection pipe, the flow guide net, the isolation film and the demolding cloth after cooling, and finishing and flattening the surface of the integrated structure.
8. The manufacturing method according to claim 4, 5 or 6, wherein a leading edge pinch-off gap region and a trailing edge pinch-off gap region of the segmented blade are disposed opposite to each other in a chordwise direction of the segmented blade; and/or
The suction surface and the pressure surface of the segmented blade are oppositely arranged along the vertical direction of the chord direction of the segmented blade; and/or
The pressure surface of the segmented blade is the wind receiving surface of the segmented blade; and/or
The suction surface of the sectional blade is the leeward surface of the sectional blade; and/or
The first sub prefabricated plate is matched with the airfoil shape of the suction surface of the sectional blade; and/or
The second sub prefabricated plate is matched with an airfoil profile of the pressure surface of the segmented blade; and/or
The third sub prefabricated plate is matched with the airfoil profile of the front edge mold closing gap area of the segmented blade; and/or
And the fourth sub prefabricated plate is matched with the airfoil profile of the rear edge mold closing gap area of the segmented blade.
9. The manufacturing method according to claim 4, 5 or 6, wherein the first sub-prefabricated panel is formed using a vacuum infusion process or a hand lay-up molding process; and/or
Forming the second sub prefabricated panel by using a vacuum infusion process or a hand lay-up forming process; and/or
Forming the third sub prefabricated plate by utilizing a vacuum infusion process or a hand lay-up forming process; and/or
And forming the fourth sub prefabricated panel by using a vacuum infusion process or a hand lay-up forming process.
10. A manufacturing method according to claim 3, wherein the material of the first and second preformed sheets comprises a fiberglass material; the material of the material layer includes a resin material.
11. The manufacturing method according to claim 10, wherein the first preform has a thickness in a range of 4mm to 5 mm; and/or
The weight ratio of the glass fiber material to the resin material is at least 7: 3; and/or
The glass fiber material comprises biaxial woven cloth or uniaxial woven cloth or triaxial woven cloth; and/or
The resin material comprises epoxy resin or vinyl resin or epoxy vinyl resin or light-cured resin.
12. The manufacturing method according to claim 1, wherein after the forming of the at least two segments of the segmented blade, before the abutting of the opposing connection portions of the adjacent two segments of the segmented blade, the manufacturing method further comprises:
providing a fixed support for supporting the segmented blade;
placing the formed at least two segments of the segmented blades on the fixing bracket, and keeping the pressure surfaces of the segmented blades upward; and the pressure surface of the segmented blade is the wind receiving surface of the segmented blade.
13. The method of manufacturing of claim 1, wherein said forming at least two segments of segmented blades comprises:
the at least two segments of segmented vanes are formed using a vacuum infusion process.
14. A fan blade comprising a multi-segment blade manufactured by the method of manufacturing a fan blade according to any of claims 1 to 13.
15. A wind turbine, comprising:
a tower drum;
a nacelle mounted on the tower; and
a wind wheel mounted to the nacelle; the wind rotor comprises a rotatable hub and at least one fan blade according to claim 14 above, mounted to the hub.
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