CN117103725A - Manufacturing method of main beam, blade and wind generating set - Google Patents
Manufacturing method of main beam, blade and wind generating set Download PDFInfo
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- CN117103725A CN117103725A CN202311389544.7A CN202311389544A CN117103725A CN 117103725 A CN117103725 A CN 117103725A CN 202311389544 A CN202311389544 A CN 202311389544A CN 117103725 A CN117103725 A CN 117103725A
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- prepreg
- plate
- base material
- main beam
- girder
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 43
- 239000011159 matrix material Substances 0.000 claims abstract description 26
- 238000010438 heat treatment Methods 0.000 claims abstract description 21
- 230000000670 limiting effect Effects 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims description 82
- 239000000758 substrate Substances 0.000 claims description 33
- 239000011347 resin Substances 0.000 claims description 21
- 229920005989 resin Polymers 0.000 claims description 21
- 239000004744 fabric Substances 0.000 claims description 9
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 6
- 239000004917 carbon fiber Substances 0.000 claims description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 6
- 230000037303 wrinkles Effects 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 description 27
- 239000010410 layer Substances 0.000 description 18
- 238000010586 diagram Methods 0.000 description 4
- 238000001723 curing Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000013007 heat curing Methods 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002829 reductive effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000010257 thawing Methods 0.000 description 1
- 238000003856 thermoforming Methods 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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
- B29C70/34—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
-
- 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
Abstract
The application relates to a manufacturing method of a main beam, the main beam, a blade and a wind generating set, wherein the manufacturing method of the main beam comprises the following steps: providing a girder die, wherein the girder die is provided with a molded surface and a limiting structure arranged on the molded surface; providing a plurality of plates; paving the plate to the main beam die, and enabling at least part of the plate to be abutted against the limiting structure; paving prepreg on one side of the plate, which is away from the main beam die, and enabling the extending dimension of the prepreg to be smaller than that of the plate in a first direction; repeating the step of paving the plate to the main beam die and the step of paving the prepreg on one side of the plate away from the main beam die to obtain a matrix to be formed; and heating the matrix to be formed so as to form the matrix to obtain the main girder. The manufacturing method of the main beam provided by the embodiment of the application can improve the production efficiency and the product quality.
Description
Technical Field
The application relates to the technical field of wind power generation, in particular to a manufacturing method of a main beam, the main beam, blades and a wind generating set.
Background
In the existing wind power blade, a main beam of the wind power blade is made of a plate material with high strength and light weight as a layering material, and the plate material is required to have a specified cross-sectional shape and thickness, so that the wind power blade is difficult to process. Meanwhile, the length of the existing large wind power blade can exceed 80m, the thickness can exceed 50mm, the width can be 300 mm-600 mm, and the large and integral main beam consistent with the size and the outline of the wind power blade cannot be directly produced generally due to the current forming process of the plate. Instead, the spar of a given thickness and width is typically designed using stacking in the thickness direction and splicing in the width direction in the blade. However, due to the existence of multiple layers and stacks of plates, the main girder has a certain probability of pouring defects, such as poor impregnation or dry yarns, among different laminates under the existing blade pouring molding process. These will seriously affect the main beam quality, causing significant losses and impact on blade safety.
Therefore, there is a need for a method for manufacturing a girder with simple structural form and reliable product quality, and a corresponding girder, blade, and wind generating set.
Disclosure of Invention
The embodiment of the application provides a manufacturing method of a main beam, the main beam, a blade and a wind generating set, which can improve the production efficiency and the product quality.
In a first aspect, an embodiment of the present application provides a method for manufacturing a main beam, including: providing a girder die, wherein the girder die is provided with a molded surface and a limiting structure arranged on the molded surface; providing a plurality of plates; paving the plate to a main beam die, and enabling at least part of the plate to be abutted against the limiting structure; paving prepreg on one side of the plate, which is away from the girder die, and enabling the extending dimension of the prepreg to be smaller than that of the plate in the first direction; repeating the steps of paving the plate to the main beam mould and paving the prepreg on one side of the plate away from the main beam mould to obtain a matrix to be formed; and heating the matrix to be formed so as to form the matrix to obtain the main girder.
According to one aspect of an embodiment of the application, the step of laying down prepreg on the side of the sheet facing away from the girder die comprises: providing a prepreg base material, preheating the prepreg base material, and cleaning the surface of the prepreg base material; providing an air guide felt, and attaching the air guide felt and the prepreg base material to each other; paving the prepreg base material and the air guide felt on a plate, flattening wrinkles in the prepreg base material and compacting the wrinkles in the prepreg base material to the plate; the prepreg base material and the air guide felt are cut to obtain a prepreg.
According to one aspect of an embodiment of the application, the step of preheating the prepreg substrate comprises: and placing the prepreg base material in a preset temperature environment, wherein the preset temperature is 20-30 ℃, and the placing time of the prepreg base material is more than or equal to 20 hours.
According to one aspect of an embodiment of the present application, the step of providing a prepreg substrate further comprises: and selecting a prepreg base material made of carbon fiber cloth and resin, and enabling the thickness of the prepreg base material to be 0.2 mm-1.5 mm.
According to one aspect of an embodiment of the application, the step of laying down a prepreg on a side of the sheet facing away from the girder die further comprises: and adjusting the width and the laying position of the prepreg to enable the distance between the edge of the prepreg and the edge of the plate to be 2 mm-4 mm.
According to one aspect of an embodiment of the present application, the step of adjusting the width and lay-up position of the prepreg comprises: arranging the prepreg and the plate group in one-to-one correspondence, wherein the plate group comprises a plurality of plates which are adjacently arranged, and the distance between the edge of the prepreg and the edge of the corresponding plate group is 2 mm-4 mm in the first direction; alternatively, the step of adjusting the width and lay-up position of the prepreg comprises: the prepreg is arranged into a plurality of mutually-spaced sub-materials, the sub-materials and the plates are arranged in one-to-one correspondence, and the distance between the edges of the sub-materials and the edges of the corresponding plates is 2 mm-4 mm in the first direction.
According to an aspect of the embodiment of the present application, between the step of obtaining the substrate to be molded and the step of heating the substrate to be molded, further includes: bundling and fixing the matrix to be formed; providing a binding belt and a tensioning tool with a follow-up plate, sleeving the binding belt on a substrate to be formed, tensioning the binding belt through the tensioning tool, and enabling the substrate to be formed to be at least partially abutted with the follow-up plate; and lifting the substrate to be formed to a vacuum heating device, and adjusting the lifting height of the substrate to be formed to ensure that the distance between the substrate to be formed and the vacuum heating device in the vertical direction is less than or equal to 1.5m.
In a second aspect, embodiments according to the present application provide a main beam manufactured by the manufacturing method of any one of the embodiments of the first aspect.
In a third aspect, embodiments according to the present application provide a blade comprising a spar according to any of the embodiments of the second aspect.
In a fourth aspect, according to an embodiment of the application a wind power plant is presented, comprising a blade according to any of the embodiments of the third aspect.
In the manufacturing method provided by the embodiment of the application, the prepreg is paved between the plates, the plates can be bonded through the resin with the determined content existing in the prepreg, the pouring step and the use of pouring auxiliary materials such as demoulding cloth, a flow guide net, a separation film and the like can be omitted when the main beam is formed, meanwhile, the resin content is clear and is convenient to calculate, the quality of the main beam obtained after forming can be improved, and the time required for polishing and detecting is reduced, so that the production efficiency is improved.
Drawings
Features, advantages, and technical effects of exemplary embodiments of the present application will be described below with reference to the accompanying drawings.
FIG. 1 is a flow chart of a method of manufacturing a main beam according to one embodiment of the present application;
FIG. 2 is a flow chart of a method of manufacturing a main beam according to another embodiment of the present application;
FIG. 3 is a schematic diagram of a structure corresponding to step S45 in the manufacturing method shown in FIG. 2;
fig. 4 is a schematic diagram of another structure corresponding to step S45 in the manufacturing method shown in fig. 2.
In the drawings, like parts are designated with like reference numerals. The figures are not drawn to scale.
Wherein:
10-girder mould; 20-plate material; 30-prepreg; 40-a matrix to be formed;
31-sub-material;
x-first direction.
Detailed Description
Features and exemplary embodiments of various aspects of the application are described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the application. It will be apparent, however, to one skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the application by showing examples of the application. In the drawings and the following description, at least some well-known structures and techniques have not been shown in detail in order not to unnecessarily obscure the present application; also, the dimensions of some of the structures may be exaggerated for clarity. Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
The orientation words appearing in the following description are all directions shown in the drawings, and do not limit the specific structure in the molding die and the molding method of the present application. In the description of the present application, it should also be noted that, unless explicitly specified and limited otherwise, the meaning of "a plurality of" means two or more, and the terms "mounted" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected; the terms "upper," "lower," "left," "right," "inner," "outer," and the like are merely used for convenience in describing the present application and to simplify the description, and do not denote or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the present application. The specific meaning of the above terms in the present application can be understood as appropriate by those of ordinary skill in the art.
Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The specific meaning of the above terms in the present application can be understood as appropriate by those of ordinary skill in the art.
It will be appreciated that the following embodiments of the present application will be described with reference to the application of the main beam to the production and manufacture of wind power blades, but the application of the main beam provided by the embodiments of the present application is not limited to the following embodiments, and may be used in other situations where a plurality of plates need to be stacked and formed, and are protected.
In order to better understand the present application, a method for manufacturing a girder, a blade, and a wind turbine generator set according to embodiments of the present application are described in detail below with reference to fig. 1 to 4.
Referring to fig. 1, fig. 1 is a flowchart illustrating a method for manufacturing a main beam according to an embodiment of the application. In a first aspect, an embodiment of the present application provides a method for manufacturing a main beam, including:
s1, providing a main beam die 10, wherein the main beam die 10 is provided with a molded surface and a limiting structure arranged on the molded surface;
s2, providing a plurality of plates 20;
s3, paving the plate 20 to the main beam die 10, and enabling at least part of the plate 20 to be abutted against the limiting structure;
s4, paving a prepreg 30 on one side of the plate 20 away from the girder die 10, wherein the extending dimension of the prepreg 30 is smaller than that of the plate 20 in the first direction X;
s5, repeating the step S3 of paving the plate 20 to the girder die 10 and the step S4 of paving the prepreg 30 on one side of the plate 20 away from the girder die 10 to obtain a matrix 40 to be formed;
and S6, heating the matrix 40 to be formed so as to form the main beam.
The present application first provides a method of manufacturing a girder, which first includes a step S1 of providing a girder mold 10, the girder mold 10 for providing support and auxiliary shaping, whereby a side surface of the girder mold 10 for layering should have a shape matching a side surface of a girder to be formed. The girder die 10 in the embodiment of the present application may be provided with a limiting structure, which may be provided along with the edge of the girder to be formed, so as to provide a further limiting effect during the laying process. Alternatively, the limiting structure may be disposed to extend along the extending direction of the main beam 10 to be formed, that is, the length direction of the main beam mold 10, and define the position of at least one side edge of the ply in the extending direction, so as to facilitate alignment.
Subsequently in step S2, a board 20 to be laid is provided. The plate 20 is used as a main body supporting structure of the main beam to be formed, and has a certain structural strength, meanwhile, in order to reduce the weight of the whole blade, the plate 20 is required to have a small weight, on the basis, the plate 20 can be formed by a pultrusion process, and further, the plate 20 can be a carbon fiber pultrusion plate. The plate 20 may be a rectangular plate-like member, and may be provided in the same shape at a position near the edge of the girder in correspondence with the shape of the edge. Because the original pouring process step is omitted in the manufacturing method provided by the embodiment of the application, a chamfering structure arranged for ensuring that the fluidity of the glue reaches a preset value during pouring can be correspondingly omitted, and therefore, the plate 20 can be a right-angle pultrusion plate, and the cross section of the plate 20 can be rectangular, so that the plate is convenient for cutting and processing, and laying of release cloth is convenient.
In step S3, the plate 20 provided in the previous step is laid onto the girder die 10, and when laying, the plates 10 with different thicknesses and widths can be correspondingly adopted according to the width and thickness of the girder to be formed at the position, and can be respectively laid onto different positions. Alternatively, the opposite ends of the main beam to be formed in the direction of extension thereof may have different thicknesses, i.e. different layers may be laid at different positions when laying the board 10. The girder may be applied to a blade in a wind power plant, for example, where a greater number of layers of sheet material 20 may be laid at the end adjacent the blade root.
The above-described limit structure in the girder mold 10 may be used to define the laying position during the laying of the boards 20, and at the same time, after each board 20 is laid, the laying position of the boards 20 may be further corrected by pushing and pressing in a direction intersecting with the extending direction of the limit structure.
In step S4, the prepreg 30 may be continuously laid on the sheet 20 layer structure formed by laying in step S3. The prepreg 30 may be made of a resin material and a glass fiber cloth layer or a carbon fiber cloth layer, in which a specific content of the resin material is contained, and in use, the prepreg 30 may be selected according to parameters such as the total amount of resin required between each of the laminates 20 and the strength required for the girder to be formed.
Further, during the laying process, the coverage area of the prepreg 30 may be made similar to the area of the board 20, that is, the prepreg 30 may be uniformly distributed on the layers of the board 20, and the coverage area exceeds a preset value, so as to ensure that the resin amount between two adjacent layers of the board 20 can be sufficient to form the interface bonding in the subsequent thermoforming process. Meanwhile, along the first direction X, that is, the width direction of the main beam to be formed, the whole extending dimension of the prepreg 30 should be slightly smaller than the whole extending direction of the board 20, so as to avoid the problem of glue overflow of the edge of the board 20 in the process of heating and curing.
Step S5 is then performed, i.e., the above steps S3 and S4 are repeated, and the support layer made of the board 20 and the prepreg layer made of the prepreg 30 are alternately laid one by one, so that the support layer 20 is the outermost layer on the opposite sides in the stacking direction after the laying is completed. It will be appreciated that the shape and size of each prepreg 30 should correspond to one of the two support layers that are disposed adjacent to each other, and the shape of each support layer may be different from that of the adjacent support layers, that is, the number, size and thickness of the boards 20 in each support layer may be different, so that the shape of the to-be-formed substrate 40 formed after the laying is the same as that of the formed main beam.
In step S6, the matrix to be formed 40 laid in the step S5 may be heated and cured, and the resin material in the prepreg 30 in the matrix to be formed 40 may be heated and cured by vacuumizing the matrix to be formed 40 and heating to a preset temperature, and in this process, an interface bond is formed, two adjacent layers of boards 20 are connected together, and finally the matrix to be formed 40 is bonded and cured into a whole, that is, a main beam. The curing temperature may be defined as between 90 ℃ and 120 ℃, and the specific values thereof may be selected according to the parameters associated with the sheet material 20 and the prepreg 30.
The main beam manufacturing method provided by the embodiment of the application can avoid possible defects among plates during pouring from the principle of a forming method, can simplify process steps and save processing cost, and can further save the step of full-size detection by accurately calculating the resin content, so that the production efficiency is further improved.
Referring to fig. 2, fig. 2 is a flowchart illustrating a method for manufacturing a main beam according to another embodiment of the application. In some alternative embodiments, step S4 of laying down the prepreg 30 on a side of the sheet 20 facing away from the girder die 10 includes:
s41, providing a prepreg base material, preheating the prepreg base material, and cleaning the surface of the prepreg base material;
s42, providing an air guide felt, and attaching the air guide felt and the prepreg base material to each other;
s43, paving the prepreg base material and the air guide felt on the plate 20, flattening the wrinkles in the prepreg base material and compacting the wrinkles to the plate 20;
and S44, cutting the prepreg base material and the air guide felt to obtain the prepreg 30.
In step S4 of laying up the prepreg 30, a prepreg base material may be first provided in step S41, which may include a prepreg main body material layer and a protective film laminated on at least one side of the material layer, and may be wound up for storage during storage to save space. Before the prepreg 30 is laid, it may be first heated and thawed to soften the impregnated resin material therein, and then the surface of the prepreg base material is cleaned, and the protective film is removed and cleaned of impurities, so as to avoid adverse effects on the quality of the main beam caused by foreign objects entering.
Subsequently, in step S42, an air guiding felt may be provided and attached to the prepreg substrate to be laid, where the air guiding felt may be made of nylon cotton or fiber cloth, and provides air guiding function in the subsequent process steps. Optionally, in the extending direction of the main beam to be formed, the starting end of the air guide felt may be flush with the base material of the prepreg base material; in the first direction X, the edge of the air guide felt may be disposed beyond the edge of the prepreg base material, so that the air guide felt can exhaust the interlayer residual gas, and the extension dimension of the excess portion of the air guide felt in the first direction X may be about 20 mm. It will be appreciated that, when bonding is performed, only a partial region of the starting attachment may be attached and subsequently pressed against one another as the laying proceeds.
In step S43, the start ends of the air guide felt and the prepreg base material that have been attached to each other in step S42 are moved outward to the start of laying, and are gradually laid in the direction from the blade root to the blade tip. In the laying process, a laying trolley with a certain tension can be used for assisting in laying. Specifically, the prepreg base material may be wound around the carriage bracket, one end is led out and attached to the air guide felt, and the prepreg base material and the air guide felt are simultaneously laid on the board 20 as the laying carriage moves from the blade root side to the blade tip side. Optionally, in the process of laying the trolley, a worker can keep a certain interval to synchronously move with the trolley so as to synchronously sweep and compact the laid air guide felt and the prepreg base material, so that the laying evenness and the position accuracy are improved.
In step S44, the laid prepreg base material and the air guide felt are trimmed and cut to make the edges of the prepreg base material and the air guide felt neat. In embodiments of the prepreg substrate winding arrangement, the prepreg substrate may be cut off here to apply the remaining material for the next lay-up, while the paper tape for bonding in the previous step S42 may also be removed.
Through the steps S41-S44, the prepreg 30 and the auxiliary material air guide felt can be smoothly and accurately paved at a preset position on the plate 20, and the quality of the formed main beam is improved.
In some alternative embodiments, the step S41 of preheating the prepreg substrate includes:
and placing the prepreg base material in a preset temperature environment, wherein the preset temperature is 20-30 ℃, and the placing time of the prepreg base material is more than or equal to 20 hours.
As previously mentioned, prior to laying the prepreg substrate, it is generally necessary to first heat and insulate it to thaw it, soften it to a state that facilitates laying, and provide for heat curing in a subsequent process step.
On the basis, the process of thawing the prepreg base material may include placing the prepreg base material in a preset temperature environment, which may be specifically 20 ℃ to 30 ℃, optionally 25±3 ℃ for a certain period of time, and maintaining the prepreg base material as stable as possible by adjusting a heating device and the like. The heating period may be greater than or equal to 20 hours, optionally about 24 hours. The specific heating temperature and heating time period may be selected according to environmental conditions and parameters such as material and resin content of the prepreg base material, and the present application is not limited thereto.
In some alternative embodiments, the step S41 of providing a prepreg base material further includes:
and selecting a prepreg base material made of carbon fiber cloth and resin, and enabling the thickness of the prepreg base material to be 0.2 mm-1.5 mm.
Further, the step S41 of providing a prepreg base material may further include selecting a suitable prepreg base material. The prepreg base material prepared by taking carbon fiber cloth and thermosetting resin as components can be selected according to the requirements of high strength and light weight of the main beam. Meanwhile, the thickness of the prepreg base material itself has different values due to different gram weights, and in order to make the resin content between the boards 20 sufficient and keep lighter weight, the thickness of the prepreg base material can be selected to be 0.2 mm-1.5 mm. The specific numerical values thereof can be selected according to the calculated required resin total amount, interlayer thickness and other parameters, and the application is not particularly limited thereto.
Referring to fig. 3 and fig. 4 together, fig. 3 is a schematic structural diagram corresponding to step S45 in the manufacturing method shown in fig. 2, and fig. 4 is another schematic structural diagram corresponding to step S45 in the manufacturing method shown in fig. 2. In some alternative embodiments, step S4 of laying down the prepreg 30 on a side of the sheet 20 facing away from the girder die 10 further comprises:
s45, adjusting the width and the laying position of the prepreg 30 so that the distance between the edge of the prepreg 30 and the edge of the plate 20 is 2 mm-4 mm.
The manufacturing method provided by the embodiment of the application includes a step S4 of laying the prepreg 30 onto the board 20, specifically, when laying, a certain interval is formed between the edge of the prepreg 30 and the edge of the board 20, so as to provide a certain space for the outflow of the resin in the prepreg 30. Thus, the width of the prepreg 30 should be smaller than the width of the plate 20, and the interval between the edge of the prepreg 30 and the edge of the plate 20 may be 2mm to 4mm, and a gap within this range may allow the resin contained therein to flow to the edge of the plate 20 and achieve full filling while reducing the possibility of resin overflow after the prepreg 30 is cured by heat. The specific width value can be designed according to the resin content of the prepreg 30, that is, the specific width value is in direct proportion to the total resin content of the prepreg 30 between the plates 20, so as to further improve the quality of the manufactured product.
In some alternative embodiments, the step S45 of adjusting the width and lay-up position of the prepreg 30 includes:
the prepreg 30 and the plate group are arranged in one-to-one correspondence, the plate group comprises a plurality of plates 20 which are adjacently arranged, and the distance between the edge of the prepreg 30 and the edge of the corresponding plate group is 2 mm-4 mm in the first direction X.
Alternatively, the step S47 of adjusting the width and lay-up position of the prepreg 30 includes:
the prepreg 30 is arranged into a plurality of mutually-spaced sub-materials 31, the sub-materials 31 are arranged in one-to-one correspondence with the plates 20, and the distance between the edges of the sub-materials 31 and the edges of the corresponding plates 20 in the first direction X is 2 mm-4 mm.
As described above, when the prepreg 30 is laid, a certain distance should be provided between the edge of the prepreg 30 and the edge of the board 20, and then, when the prepreg 30 is laid, each prepreg 30 may be laid over a plurality of boards 20, or the prepregs 30 may be arranged in a one-to-one correspondence with the boards 20.
Specifically, each prepreg 30 may be disposed corresponding to a panel group, and a plurality of adjacently disposed panels 20 may be included in the panel group, and the panels 20 are simultaneously covered with the same prepreg 30. In the first direction X, the prepreg 30 has a distance of 2 mm-4 mm between the orthographic projection edge on the plate group and the edge of the whole plate group. Alternatively, the shape, size, arrangement, etc. of the individual sheets 20 in each sheet group may be different, and the prepreg 30 may adjust its shape and size correspondingly so that the gap between the edges thereof conforms to the aforementioned numerical range.
Or, each prepreg 30 may be disposed in a one-to-one correspondence with the plate 20, and at this time, the prepreg 30 may be laid onto one plate 20 correspondingly, and at the same time, the prepreg 30 has a gap of 2 mm-4 mm between the orthographic projection edge on the plate 20 corresponding to itself and the edge of the plate 20.
It will be appreciated that the two foregoing arrangement modes may be used simultaneously, that is, when the prepreg 30 is laid, the prepreg 30 may be laid with pertinence according to specific parameters such as the size, shape, and arrangement position of the board 20, so that a portion of the prepreg 30 is arranged in one-to-one correspondence with the board 20, and another portion of the prepreg 30 may cover a plurality of boards 20 simultaneously.
In some alternative embodiments, between the step S5 of obtaining the substrate 40 to be molded and the step S6 of heating the substrate 40 to be molded, further includes:
s51, bundling and fixing the matrix 40 to be formed;
s52, providing a binding belt and a tensioning tool with a follow-up plate, sleeving the binding belt on the substrate 40 to be formed, tensioning through the tensioning tool, and enabling at least part of the substrate 40 to be formed to be abutted against the follow-up plate;
s53, lifting the substrate 40 to be formed to a vacuum heating device, and adjusting the lifting height of the substrate 40 to be formed so that the distance between the substrate 40 to be formed and the vacuum heating device in the vertical direction is smaller than or equal to 1.5m.
After the board 20 and the prepreg 30 are alternately laid to obtain the matrix 40 to be formed, the matrix may be transported to a vacuum heating device capable of heating the matrix by a crane, a gantry crane, or the like to perform a next curing forming process, and step S51 may be performed first in the lifting process, that is, the matrix 40 to be formed laid on the girder mold 10 is bound and fixed, so that the matrix may be integrally moved.
Then in step S52, a tensioning tool matched with the shape of the to-be-formed substrate 40 is adopted, a follow-up plate matched with the shape of the to-be-formed substrate 40 in the tool is abutted against the to-be-formed substrate 40, and then binding and fixing are performed through a binding belt, so that the to-be-formed substrate 40 can keep the original shape without moving or scattering in the lifting process.
In step S53, the matrix 40 to be formed after the binding is fixed is lifted, and the lifting hook may be connected with a tensioning tool during transportation. Meanwhile, the lifting height is smaller than or equal to 1.5m, the matrix 40 to be formed or the lifting tool is prevented from being damaged due to overlarge bending degree during lifting, and the reliability of the main beam manufacturing method is further improved.
In a second aspect, embodiments according to the present application provide a main beam manufactured by the manufacturing method of any one of the embodiments of the first aspect.
In a third aspect, embodiments according to the present application provide a blade comprising a spar according to any of the embodiments of the second aspect.
In a fourth aspect, according to an embodiment of the application a wind power plant is presented, comprising a blade according to any of the embodiments of the third aspect.
The girder, the blade and the wind generating set provided by the embodiment of the application have all the beneficial effects of the girder manufacturing method, and the description and the explanation of the girder manufacturing method in the previous embodiment can be specifically referred to, and the application is not repeated here.
While the application has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the application. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.
Claims (10)
1. A method of manufacturing a main beam, comprising:
providing a girder die, wherein the girder die is provided with a molded surface and a limiting structure arranged on the molded surface;
providing a plurality of plates;
paving the plate to the main beam die, and enabling at least part of the plate to be abutted against the limiting structure;
paving prepreg on one side of the plate, which is away from the main beam die, and enabling the extending dimension of the prepreg to be smaller than that of the plate in a first direction;
repeating the step of paving the plate to the main beam die and the step of paving the prepreg on one side of the plate away from the main beam die to obtain a matrix to be formed;
and heating the matrix to be formed so as to form the matrix to obtain the main girder.
2. The method of manufacturing according to claim 1, wherein the step of laying down a prepreg on a side of the sheet facing away from the girder die comprises:
providing a prepreg base material, preheating the prepreg base material, and cleaning the surface of the prepreg base material;
providing an air guide felt, and attaching the air guide felt and the prepreg base material to each other;
paving the prepreg base material and the air guide felt on the plate, flattening the wrinkles in the prepreg base material and compacting the wrinkles to the plate;
cutting the prepreg base material and the air guide felt to obtain the prepreg.
3. The method of manufacturing according to claim 2, wherein the step of preheating the prepreg base material comprises:
and placing the prepreg base material in a preset temperature environment, wherein the preset temperature is 20-30 ℃, and the placing time of the prepreg base material is more than or equal to 20 hours.
4. The method of manufacturing according to claim 2, wherein the step of providing a prepreg substrate further comprises:
and selecting the prepreg base material made of carbon fiber cloth and resin, and enabling the thickness of the prepreg base material to be 0.2 mm-1.5 mm.
5. The method of manufacturing of claim 1, wherein the step of laying down prepreg on a side of the sheet facing away from the girder die further comprises:
and adjusting the width and the laying position of the prepreg to enable the interval between the edge of the prepreg and the edge of the plate to be 2 mm-4 mm.
6. The method of manufacturing according to claim 5, wherein the step of adjusting the width and lay-up position of the prepreg comprises:
arranging the prepreg and the plate group in a one-to-one correspondence manner, wherein the plate group comprises a plurality of plates which are adjacently arranged, and the distance between the edge of the prepreg and the edge of the corresponding plate group is 2 mm-4 mm in the first direction;
alternatively, the step of adjusting the width and lay-up position of the prepreg includes:
the prepreg is arranged into a plurality of mutually-spaced sub-materials, the sub-materials are arranged in one-to-one correspondence with the plates, and in the first direction, the distance between the edges of the sub-materials and the edges of the corresponding plates is 2 mm-4 mm.
7. The method of manufacturing according to claim 1, wherein between the step of obtaining the base to be molded and the step of heating the base to be molded, further comprising:
binding and fixing the matrix to be formed;
providing a binding belt and a tensioning tool with a follow-up plate, sleeving the binding belt on the substrate to be formed, tensioning the substrate to be formed through the tensioning tool, and enabling the substrate to be formed to be at least partially abutted with the follow-up plate;
and lifting the substrate to be formed to a vacuum heating device, and adjusting the lifting height of the substrate to be formed so that the distance between the substrate to be formed and the vacuum heating device in the vertical direction is smaller than or equal to 1.5m.
8. A girder manufactured by the manufacturing method according to any one of claims 1 to 7.
9. A blade comprising a spar according to claim 8.
10. A wind power plant comprising a blade according to claim 9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311389544.7A CN117103725A (en) | 2023-10-24 | 2023-10-24 | Manufacturing method of main beam, blade and wind generating set |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311389544.7A CN117103725A (en) | 2023-10-24 | 2023-10-24 | Manufacturing method of main beam, blade and wind generating set |
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| CN116512640A (en) * | 2022-12-07 | 2023-08-01 | 中材科技（邯郸）风电叶片有限公司 | Large wind power blade pultruded glass panel main beam interlayer pouring system and pouring method |
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