CN113370555A - Preparation method for integrally forming wind power blade - Google Patents
Preparation method for integrally forming wind power blade Download PDFInfo
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- CN113370555A CN113370555A CN202110641432.0A CN202110641432A CN113370555A CN 113370555 A CN113370555 A CN 113370555A CN 202110641432 A CN202110641432 A CN 202110641432A CN 113370555 A CN113370555 A CN 113370555A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 19
- 239000002131 composite material Substances 0.000 claims abstract description 21
- 238000010438 heat treatment Methods 0.000 claims abstract description 5
- 238000000465 moulding Methods 0.000 claims abstract 8
- 239000004793 Polystyrene Substances 0.000 claims description 82
- 239000000835 fiber Substances 0.000 claims description 32
- 239000012528 membrane Substances 0.000 claims description 19
- 238000004519 manufacturing process Methods 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 16
- 229920002223 polystyrene Polymers 0.000 claims description 6
- 238000000605 extraction Methods 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 4
- 210000001503 joint Anatomy 0.000 claims 1
- 238000010248 power generation Methods 0.000 abstract description 2
- 238000001723 curing Methods 0.000 abstract 1
- 229910000976 Electrical steel Inorganic materials 0.000 description 75
- 230000005611 electricity Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 7
- 239000000853 adhesive Substances 0.000 description 6
- 230000001070 adhesive effect Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 239000007788 liquid Substances 0.000 description 4
- 239000004744 fabric Substances 0.000 description 3
- 230000002787 reinforcement Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000007306 turnover Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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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
- B29C70/342—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation using isostatic pressure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
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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
Abstract
The invention provides a preparation method for integrally forming a wind power blade, and relates to the technical field of wind power generation blades. The preparation method for integrally forming the wind power blade at least comprises the following steps: firstly, laying an outer film layer on the SS surface of a wind power blade mould and arranging a precast beam and a web plate; then arranging the first positive pressure bag, the second positive pressure bag and the third positive pressure bag in a cavity between the SS surface and the web plate of the mold; then, a PS surface and an SS surface of the wind power blade mould are matched, so that the PS surface and the SS surface and the first positive pressure bag and the third positive pressure bag form pneumatic molded surfaces in the wind power blade mould; then injecting the composite material into a wind power blade mould by utilizing air pressure difference to form a blade product; and finally, heating, curing and molding the blade product. According to the preparation method disclosed by the invention, the SS surface, the PS surface and the web plate of the wind power blade are simultaneously molded when the wind power blade is manufactured, the integral consistency and the performance stability of a wind power blade mold are ensured, and the integral strength of the wind power blade is further effectively improved.
Description
Technical Field
The invention belongs to the technical field of wind power generation blades, and particularly relates to a preparation method for integrally forming a wind power blade.
Background
At present, the mainstream production process of large-scale wind power blades at home and abroad is formed by bonding and assembling two surfaces, namely a Pressure surface (PS surface for short) and a Suction surface (SS surface for short). When the wind power blade is manufactured based on the design, a manufacturer of the wind power blade designs that the SS surface is a fixed surface and the PS surface is a turnover surface for ensuring that the blade shape meets the design requirement, the blade mold is designed into a structure that the SS surface is a fixed surface and the PS surface is a turnover surface, the two surfaces are manufactured on the blade mold independently, the PS surface is turned over to the flange surface of the SS surface mold according to a hydraulic turning system of the blade mold after the manufacturing is finished, and the PS surface is bonded and fixed through a web plate and a bonding angle on the inner side of the molded surface. Then the whole is heated and solidified. The thickness of structural adhesive used at the joint of the PS surface and the SS surface of the wind power blade is difficult to effectively control, the uniformity is difficult to guarantee, the phenomenon that local structural adhesive is too thick and less exists, the strength at the parting position of the blade cannot meet the use requirement, and manual hand pasting reinforcement needs to be carried out at the parting position, so that the quality and the efficiency of the wind power blade cannot be considered during production under the existing preparation method. Therefore, it is necessary to provide a method for integrally forming a wind turbine blade to solve the above problems.
Disclosure of Invention
The invention aims to provide a preparation method for integrally forming a wind power blade, which is used for solving the technical problems that in the existing preparation method, the production efficiency and the product quality of the wind power blade are difficult to give consideration to both because the thickness of the joint of a PS surface and an SS surface of the wind power blade bonded by using a structural adhesive is difficult to effectively control and the uniformity is difficult to ensure and manual hand pasting reinforcement is required at a parting position.
In order to achieve the above objects and other related objects, the present invention provides a method for integrally forming a wind turbine blade, wherein; the preparation method at least comprises the following steps:
s1, paving an SS (surface mounting) outer membrane layer on the SS surface of the first wind power blade mould, and arranging a first precast beam on the SS outer membrane layer; s2, arranging a first prefabricated web plate and a second prefabricated web plate on two sides of the first prefabricated beam, and paving SS surface fiber layers on two sides of the first prefabricated web plate and the second prefabricated web plate; s3, sequentially arranging a first positive pressure bag, a second positive pressure bag and a third positive pressure bag in a cavity between the first prefabricated web plate and the second prefabricated web plate and the SS surface of the first wind power blade mould, and filling the cavity with gas; s4, installing a second precast beam above a second positive pressure bag between the first precast web plate and the second precast web plate, laying PS (polystyrene) surface fiber layers on the first positive pressure bag and the third positive pressure bag on two sides of the second precast beam, and overlapping the connection parts of the PS surface fiber layers and the SS surface fiber layers; s5, laying a PS (polystyrene) outer membrane layer on the second precast beam and the PS fiber layer, and overlapping the SS outer membrane layer with the PS outer membrane layer; s6, closing the second wind power blade mould with the PS forming surface and the first wind power blade mould, and performing negative pressure air extraction along the outer contour of the closed wind power blade mould; s7, injecting the composite material into a die for closing the wind power blade by using air pressure difference to form a blade product; and S8, heating the blade product to solidify and mold the wind power blade.
In an embodiment of the present invention, the step S1 includes the following steps:
s11, paving an SS surface outer film layer on the SS surface of the first wind power blade mould; and S12, arranging the first precast beam at a set position on the SS plane outer film layer.
In one embodiment of the present invention, in step S4, the PS plane fiber layer and the SS plane fiber layer are overlapped at the connecting portion in a staggered manner.
In one embodiment of the present invention, in step S5, the SS plane outer film layer and/or the PS plane outer film layer are overlapped by layering and dislocation, with a joint margin left at the joint.
In an embodiment of the present invention, the first precast beam and the second precast beam are products with variable cross sections and different thicknesses, and the SS and PS out-plane film layers cooperate with the first precast beam and the second precast beam to form a same curved surface.
In an embodiment of the invention, the preparation method further includes a process of performing positive pressure inflation on the first positive pressure bag, the second positive pressure bag and the third positive pressure bag after mold closing and before negative pressure air extraction, so that the first positive pressure bag, the second positive pressure bag and the third positive pressure bag are tightly attached to the PS forming surface and the SS forming surface of the wind turbine blade mold.
In an embodiment of the present invention, the bag surface of the first positive pressure bag and/or the third positive pressure bag is provided with a chord-direction backflow channel and a span-direction backflow channel.
In an embodiment of the invention, the spanwise backflow channel is arranged on the bag surfaces of the first positive pressure bag and the third positive pressure bag along the direction from the blade root to the blade tip of the wind turbine blade mold, and the chordwise backflow channel is arranged on the bag surfaces of the first positive pressure bag and the third positive pressure bag along the direction orthogonal to the spanwise backflow channel.
In an embodiment of the present invention, a vent hole is provided at a blade root of the wind turbine blade mold, and in step S6, after the PS surface and the SS surface of the wind turbine blade mold are closed, the positive pressure vent pipes and the spanwise backflow passage on the first positive pressure bag and the third positive pressure bag are led out to the outside of the sealing area of the wind turbine blade mold.
In an embodiment of the invention, in the step S7, the spanwise backflow channel is put into the composite material, and the composite material flows into the wind turbine blade mold along the chordwise backflow channel and the spanwise backflow channel through the vent holes under the air pressure.
According to the preparation method for integrally forming the wind power blade, the SS surface and the PS surface of the wind power blade mould are paved with the layer materials, the first positive pressure bag and the second positive pressure bag which are matched with the SS surface and the PS surface of the mould matched with the mould are placed, the pneumatic molded surface of the blade is formed in the wind power blade mould, then the composite material formed by the wind power blade is injected into the pneumatic molded surface by utilizing the air pressure difference between the inside and the outside of the wind power blade mould to form a blade product, and finally the blade product in the wind power blade mould is heated to enable the wind power blade to be cured and formed.
In conclusion, the preparation method for integrally forming the wind power blade realizes the simultaneous forming of the SS surface, the PS surface and the web plate of the wind power blade when the wind power blade is manufactured, avoids the defect caused by separately manufacturing the SS surface and the PS surface of the wind power blade and then connecting the SS surface and the PS surface in an adhesive form, ensures the integral consistency and the performance stability of a wind power blade mould, and further effectively improves the strength index of the wind power blade.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic flow step diagram of a manufacturing method for integrally forming a wind turbine blade according to the present invention.
Fig. 2 is a schematic view of a specific flow step of step S1 in the manufacturing method for integrally forming the wind turbine blade according to the present invention.
FIG. 3 is a schematic structural diagram of the wind blade mold according to the present invention when the wind blade is manufactured.
FIG. 4 is a schematic view of a first positive pressure bag and a third positive pressure bag in a wind turbine blade mold according to the present invention.
Fig. 5 is a schematic structural view of contact surfaces of the first positive pressure bag and the third positive pressure bag and the wind power blade mold.
In the drawings, the components represented by the respective reference numerals are listed below:
1 wind power blade die
11 first wind-powered electricity generation blade mould
111 mould SS surface
12 second wind power blade mould
121 PS face of die
2 first precast beam
21 first prefabricated web
22 second prefabricated web
3 second precast beam
4 first positive pressure bag
5 second positive pressure bag
6 third positive pressure bag
7 chord direction backflow channel
8-direction reverse flow channel
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict. It is also to be understood that the terminology used in the examples is for the purpose of describing particular embodiments only, and is not intended to limit the scope of the present invention. Test methods in which specific conditions are not specified in the following examples are generally carried out under conventional conditions or under conditions recommended by the respective manufacturers.
When numerical ranges are given in the examples, it is understood that both endpoints of each of the numerical ranges and any value therebetween can be selected unless the invention otherwise indicated. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs and the description of the present invention, and any methods, apparatuses, and materials similar or equivalent to those described in the examples of the present invention may be used to practice the present invention.
The invention provides a preparation method for integrally forming a wind power blade, which is used for solving the technical problems that in the existing preparation method, the production efficiency and the product quality of the wind power blade are difficult to give consideration to both because the thickness of the joint of a PS surface and an SS surface of the wind power blade bonded by using a structural adhesive is difficult to effectively control and the uniformity is difficult to ensure and manual hand pasting reinforcement is required at a parting position.
Referring to fig. 3, a wind turbine blade mold 1 used in the manufacturing method for integrally forming a wind turbine blade of the present invention includes a first wind turbine blade mold 11 and a second wind turbine blade mold 12, wherein mold steel frames are disposed on outer sides of the first wind turbine blade mold 11 and the second wind turbine blade mold 12, and the first wind turbine blade mold 11 can be placed on a plane through the mold steel frames on the outer sides, for example: ground or work platform, and second wind-powered electricity generation blade mould 12 can be placed on the plane through the mould steelframe in the outside, like ground or work platform, also can be through operation mould steelframe with second wind-powered electricity generation blade mould 12 upset and first wind-powered electricity generation blade mould 11 closure carry out the compound die, and wind-powered electricity generation blade mould 1 after the compound die tends to the closure in 1 apex one side of wind-powered electricity generation blade mould, it is complete to close until the apex department of wind-powered electricity generation blade mould 1, wind-powered electricity generation blade mould 1 is an opening in the blade root side, wind-powered electricity generation blade mould 1 sets up the baffle at the blade root opening part and is used for sealing, leave the air vent on the baffle and be used for guiding the gas tube of aerifing for the malleation bag and pour into the peripheral hardware passageway of combined material into.
Referring to fig. 1, fig. 1 is a schematic flow step diagram illustrating a manufacturing method for integrally forming a wind turbine blade according to the present invention, where the manufacturing method for integrally forming a wind turbine blade includes the following steps:
s1, paving an SS (sheet metal) outer film layer on the SS surface 111 of the first wind turbine blade mould 1, and arranging the first precast beam 2 on the SS outer film layer.
And S2, arranging a first prefabricated web plate 21 and a second prefabricated web plate 22 on two sides of the first prefabricated beam 2, and paving SS-surface fiber layers on two sides of the first prefabricated web plate 21 and the second prefabricated web plate 22, wherein the SS-surface fiber layers extend from the first prefabricated web plate 21 and the second prefabricated web plate 22 to the joint of the SS surface 111 and the PS surface 121 of the mould, and a margin is left at the joint of the SS surface 111 and the PS surface 121 of the mould. One end of the first prefabricated web plate 21 and one end of the second prefabricated web plate 22 are fixedly connected to the first prefabricated beam 2 in a bonding mode, and the other end extends along the vertical direction until the other end can abut against a second wind power blade mould 12 matched with the first wind power blade mould 11, wherein, the first prefabricated web plate 21 and the second prefabricated web plate 22 are respectively arranged at two sides of the first prefabricated beam 2 close to the outer edge of the wind power blade mould along the chord direction, at the same time, the length of the first and second prefabricated webs 21, 22 may be unlimited, in an embodiment of the present invention, the lengths of the first prefabricated web 21 and the second prefabricated web 22 may be adjusted according to the shortest distance between the position of the first prefabricated web 21 and the second prefabricated web 22 on the SS surface 111 of the mold and the PS surface 121 of the mold on the second wind turbine blade mold 12 clamped with the first wind turbine blade mold 11.
S3, sequentially arranging a first positive pressure bag 4, a second positive pressure bag 5 and a third positive pressure bag 6 in a cavity between a first prefabricated web 21, a second prefabricated web 22 and a mould SS surface 111 of a first wind power blade mould 11, wherein the first positive pressure bag 4 is arranged on the mould SS surface 111 on one side, close to the outer edge of the first wind power blade mould 11, of the first prefabricated web 21; the second positive pressure bag 5 is arranged on the first precast beam 2 and is positioned between the first precast web plate 21 and the second precast web plate 22; the third positive pressure bag 6 is arranged on the side, close to the outer edge of the first wind power blade mould 11, of the second prefabricated web 22 on the SS surface 111 of the mould. After the positive pressure bags are placed, the first positive pressure bag 4, the second positive pressure bag 5 and the third positive pressure bag 6 are inflated through inflation pipes on the first positive pressure bag 4, the second positive pressure bag 5 and the third positive pressure bag 6 on the blade root side of the wind turbine die 1 respectively, and the proper positive pressure inflation is used for enabling the outer contour shapes of the first positive pressure bag 4, the second positive pressure bag 5 and the third positive pressure bag 6 to be attached to the closed die SS surface 111, the closed die PS surface 121, the first prefabricated web 21 and the second prefabricated web 22 between the die SS surface 111 and the die PS surface 121.
And S4, installing a second precast beam 3 above the second positive pressure bag 5 between the first precast web plate 21 and the second precast web plate 22, wherein two ends of the second precast beam 3 are fixedly connected to the other ends of the first precast web plate 21 and the second precast web plate 22 respectively in an adhesion mode. And then, laying PS surface fiber layers on the first positive pressure bag 4 and the third positive pressure bag 6 on both sides of the second precast beam 3, and overlapping the connection parts of the PS surface fiber layers and the SS surface fiber layers, wherein the PS surface fiber layers have margins at the connection parts with the SS surface fiber layers.
And S5, laying a PS (polystyrene) outer membrane layer on the second precast beam 3 and the PS fiber layer, and overlapping the SS outer membrane layer with the PS outer membrane layer. And the PS outer membrane layer is connected with the SS outer membrane layer through a connecting piece, wherein a margin is reserved at the connecting part of the PS outer membrane layer and the SS outer membrane layer so as to be convenient for the SS outer membrane layer to be lapped with the PS outer membrane layer.
And S6, assembling the second wind power blade mold 12 with the PS forming surface in the wind power blade mold 1 and the first wind power blade mold 11. When the die is closed, whether the flange position between the first wind power blade die 11 and the second wind power blade die 12 is staggered or not and whether a gap exists between the dies or not are detected, and the second wind power blade die 12 is locked on the first wind power blade die 11 to realize die closing after no error is confirmed; after the die assembly, the positive pressure inflation of the first positive pressure bag 4, the second positive pressure bag 5 and the third positive pressure bag 6 is continued until the pressure in the bags reaches a set pressure value, the first positive pressure bag 4 and the third positive pressure bag 6 are in contact with the SS outer film layer on the SS surface 111 of the die, the PS outer film layer on the PS surface 121 of the die and the first prefabricated web 21 and the second prefabricated web 22 along with the continuous positive pressure inflation, so that the PS outer film layer and the SS outer film layer are completely and effectively in close contact with the PS surface 121 of the die and the SS surface 111 of the die, the formation of a pneumatic profile of the integral forming of the wind turbine blade in the wind turbine blade die 1 is ensured, the second positive pressure bag 5 is in contact with the first prefabricated beam 2 and the second prefabricated beam 3 between the first prefabricated web 21 and the second prefabricated web 22, and plays a role in supporting and fixing for the third prefabricated beam 3, wherein the pneumatic profile comprises the SS surface, the PS surface of the wind turbine blade and two web surfaces between the PS surface and the PS surface of the wind turbine blade, so as to conveniently pour and mold the integral wind power blade in the wind power blade mold 1; and then, carrying out negative pressure sealing air extraction treatment along the outer contour in the wind power blade mould 1 through the ventilation opening 14, so that a positive pressure system on the inner side of the cavity and a negative pressure system on a pouring layer are formed in the wind power blade mould 1.
And S7, injecting the composite material into the wind power blade mould by using the air pressure difference to form the blade product.
S8, heating, curing and forming the blade product, wherein in the heating, curing and forming process of the blade product, before the composite material gel in the wind power blade mould 1, the positive pressure of the air in the first positive pressure bag 4, the second positive pressure bag 5 and the third positive pressure bag 6 in the mould and the negative pressure on the inner side of the outer contour of the mould are required to be ensured to be stable at the same time, and after the composite material gel, the negative pressure on the inner side of the outer contour of the mould can be reduced and the positive pressure is ensured to be stable; after the composite material is molded, the second wind power blade mold 12 can be opened to perform mold opening treatment, and the molded blade in the wind power blade mold 1 is demolded so as to be taken out conveniently.
Referring to fig. 2, fig. 2 is a schematic diagram illustrating a specific flow step of step S1 in the manufacturing method for integrally forming a wind turbine blade according to the present invention, where step S1 is to lay an outer film layer on the mold SS surface 111 of the first wind turbine blade mold 11 and to set the first precast beam 2; the method specifically comprises the following steps:
s11, paving an SS (surface mounting) outer film layer on a SS surface 111 of a mould of a first wind power blade mould 11, wherein the SS surface 111 is fully paved on the first wind power blade mould 11, and a margin is reserved at a joint of the SS surface 111 and a PS surface 121 of the mould, and the SS surface outer film layer at the joint has different lengths, so that the SS surface outer film layer is distributed in a staggered manner on the end surface;
s12, the first precast beam 2 is set at a set position on the die SS surface 111.
In the steps S1 and S2, the first precast beam 2 and the second precast beam 3 are products with variable cross sections and different thicknesses, and two sides of the first precast beam 2 and the second precast beam 3 on the SS surface 21 and the PS surface 22 of the mold are provided with different layers of fiber cloth, so that the SS surface fiber layer and the PS surface fiber layer are respectively matched with the first precast beam 2 and the second precast beam 3 to form the same curved surface, and the overall strength of the aerodynamic molded surface in the wind turbine blade mold 1 is ensured.
In the step S4, the PS surface fiber layer and the SS surface fiber layer are layered, staggered, overlapped and laid by the multilayer fiber cloth with a margin left at the joint of the PS surface 121 and the SS surface 111 of the mold, so that the PS surface fiber layer and the SS surface fiber layer are connected into a whole, and the overall strength of the pneumatic molded surface of the blade molded in the wind turbine blade mold 1 is ensured.
In the step S5, the PS surface fiber layer and the SS surface outer film layer are layered, staggered, overlapped and laid through the residual outer film layer left at the joint of the PS surface 121 and the SS surface 111 of the mold, so that the PS surface outer film layer and the SS surface outer film layer are connected into a whole, and the overall strength of the pneumatic profile formed by the blade in the wind turbine blade mold 1 is ensured.
Referring to fig. 3 to 5, fig. 3 shows a schematic structural diagram of a wind turbine blade mold according to the present invention when a wind turbine blade is manufactured, fig. 4 shows a schematic structural diagram of a first positive pressure bag and a third positive pressure bag in the wind turbine blade mold, and fig. 5 shows a schematic structural diagram of contact surfaces of the first positive pressure bag and the third positive pressure bag with the wind turbine blade mold according to the present invention. In an embodiment of the present invention, a plurality of chordwise backflow channels 7 and spanwise backflow channels 8 are disposed on the surface of the bag surface of the first positive pressure bag 4 and the third positive pressure bag 6, wherein the spanwise backflow channels 8 are disposed on the first positive pressure bag 4 or the third positive pressure bag 6 along the direction from the blade tip to the blade root of the wind turbine blade mold 1, the chordwise backflow channels 7 are disposed on the first positive pressure bag 4 or the third positive pressure bag 6 along the direction orthogonal to the spanwise backflow channels 8, and the chordwise backflow channels 7 and the spanwise backflow channels 8 are mutually communicated.
As shown in fig. 4, in the present embodiment, in step S6, when the second wind turbine blade mold 12 of the wind turbine blade mold 1 is matched with the first wind turbine blade mold 11, the blade tip side and the blade root side of the SS outer film layer and the PS outer film layer integrated in the wind turbine blade mold 1 are sealed, and the positive pressure vent pipe and the span-wise reverse flow channel 8 of the first positive pressure bag 4 and the second positive pressure bag 5 are extended from the sealed area through the vent hole left on the blade root side of the wind turbine blade mold 1.
As shown in fig. 4, in the present embodiment, in the step S7, the closed spanwise backflow channel 8, in which the first positive pressure bag 4 and the second positive pressure bag 5 extend to the outside of the wind turbine blade mold 1, is placed in the prepared liquid composite material, such as a resin material, the switch of the spanwise backflow channel 8 on the outside of the wind turbine blade mold 1 is opened, and the air pressure difference between the outside of the composite material and the inside of the wind turbine blade mold 1 is utilized to make the composite material flow into and fill the pneumatic profiles between the first positive pressure bag 4 and the second positive pressure bag 5 and the mold SS surface 111 and the mold PS surface 121 of the wind turbine blade mold 1 along the chordwise backflow channel 7 and the spanwise backflow channel 8 on the first positive pressure bag 4 and the second positive pressure bag 5. In the process that the pneumatic profile is filled with the liquid composite material, because the resistance of the chordwise backflow channel 7 and the spanwise backflow channel 8 is low, the composite material firstly flows into the spanwise backflow channel 8 in the pneumatic profile from the outside and then flows into the chordwise backflow channel 7 communicated with the spanwise backflow channel 8 through the spanwise backflow channel 8, when the chordwise backflow channel 7 and the spanwise backflow channel 8 in the pneumatic profile are filled with the composite material, the liquid composite material can infiltrate fiber cloth on a PS (polystyrene) outer surface film layer and a SS (silicon-steel) outer surface film layer which are in contact with the liquid composite material and spread to an area between the chordwise backflow channel 7 and the spanwise backflow channel 8, and finally the whole pneumatic profile is filled to form a blade product which can be processed. It should be noted that, when step S6 injects the combined material into wind power blade mould 1, it needs to keep the stability of positive pressure air pressure of first positive pressure bag 4 and third positive pressure bag 6 and negative pressure in wind power blade mould 1, specifically, when injecting the combined material, it needs to keep the laminating with wind power blade mould 1 to constantly inflate first positive pressure bag 4 and third positive pressure bag 6, and constantly take out gas from the vent hole of wind power blade mould 1 blade root side, keep vacuum state in the pneumatic profile in wind power blade mould 1.
As described above, according to the preparation method for integrally forming the wind turbine blade, the outer film layer and the first positive pressure bag 4 and the third positive pressure bag 6 which are matched with the mold SS surface 111 and the mold PS surface 121 are arranged on the mold SS surface 111 of the first wind turbine blade mold 11 and the mold PS surface 121 of the second wind turbine blade mold 12, so that the pneumatic profile of the blade is formed in the wind turbine blade mold 1, then the composite material formed by the wind turbine blade is injected into the pneumatic profile by using the air pressure difference between the inside and the outside of the wind turbine blade mold 1 to form the blade product, and finally the blade product in the wind turbine blade mold 1 is heated to cure and form the wind turbine blade.
In conclusion, the preparation method for integrally forming the wind power blade realizes the simultaneous forming of the SS surface, the PS surface and the web plate of the wind power blade when the wind power blade is manufactured, avoids the defect caused by separately manufacturing the SS surface and the PS surface of the wind power blade and then connecting the SS surface and the PS surface in an adhesive form, ensures the integral consistency and the performance stability of a wind power blade mould, and further effectively improves the strength index of the wind power blade.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (10)
1. The preparation method for integrally forming the wind power blade is characterized by at least comprising the following steps of:
s1, paving an SS (surface mounting) outer membrane layer on the SS surface of the first wind power blade mould, and arranging a first precast beam on the SS outer membrane layer;
s2, arranging a first prefabricated web plate and a second prefabricated web plate on two sides of the first prefabricated beam, and paving SS surface fiber layers on two sides of the first prefabricated web plate and the second prefabricated web plate;
s3, sequentially arranging a first positive pressure bag, a second positive pressure bag and a third positive pressure bag in a cavity between the first prefabricated web plate and the second prefabricated web plate and the SS surface of the first wind power blade mould, and filling the cavity with gas;
s4, installing a second precast beam above a second positive pressure bag between the first precast web plate and the second precast web plate, laying PS (polystyrene) surface fiber layers on the first positive pressure bag and the third positive pressure bag on two sides of the second precast beam, and overlapping the connection parts of the PS surface fiber layers and the SS surface fiber layers;
s5, laying a PS (polystyrene) outer membrane layer on the second precast beam and the PS fiber layer, and overlapping the SS outer membrane layer with the PS outer membrane layer;
s6, closing the second wind power blade mould with the PS forming surface and the first wind power blade mould, and performing negative pressure air extraction along the outer contour of the closed wind power blade mould;
s7, injecting the composite material into a die for closing the wind power blade by using air pressure difference to form a blade product;
and S8, heating the blade product to solidify and mold the wind power blade.
2. The method for preparing the wind turbine blade integral molding according to claim 1, wherein the step S1 comprises the following steps:
s11, paving an SS surface outer film layer on the SS surface of the first wind power blade mould;
and S12, arranging the first precast beam at a set position on the SS plane outer film layer.
3. The method for manufacturing the wind turbine blade integral molding according to claim 1, wherein in step S4, the PS surface fiber layer and the SS surface fiber layer are overlapped in a layered staggered manner at the connecting portion.
4. The method for manufacturing the wind turbine blade integral molding according to claim 2 or 3, wherein in step S5, butt joint allowance is left at the joint of the SS outer film layer and/or the PS outer film layer, and the SS outer film layer and/or the PS outer film layer are overlapped in a layered staggered mode.
5. The method for preparing the wind turbine blade integral molding according to claim 1, wherein the first precast beam and the second precast beam are products with variable cross sections and different thicknesses, and the SS outer film layer and the PS outer film layer are respectively matched with the first precast beam and the second precast beam to form a same curved surface.
6. The method for preparing the wind turbine blade integral molding according to claim 1, further comprising a process of performing positive pressure inflation on the first positive pressure bag, the second positive pressure bag and the third positive pressure bag after mold assembly and before negative pressure air extraction, so that the first positive pressure bag, the second positive pressure bag and the third positive pressure bag are tightly attached to the PS forming surface and the SS forming surface of the wind turbine blade mold.
7. The preparation method of the wind power blade integral molding according to claim 1, wherein the bag surface outer side of the first positive pressure bag and/or the third positive pressure bag is provided with a chord-direction backflow channel and a span-direction backflow channel.
8. The method for integrally forming the wind power blade according to claim 7, wherein the spanwise backflow channel is arranged on the bag surfaces of the first positive pressure bag and the third positive pressure bag along the direction from the blade root to the blade tip of the wind power blade mold, and the chordwise backflow channel is arranged on the bag surfaces of the first positive pressure bag and the third positive pressure bag along the direction orthogonal to the spanwise backflow channel.
9. The method for manufacturing the integral wind blade according to claim 7, wherein a vent hole is formed in a blade root of the wind blade mold, and in step S6, after the PS surface and the SS surface of the wind blade mold are closed, the positive pressure vent pipes and the spanwise backflow channel on the first positive pressure bag and the third positive pressure bag are led out to the outside of the sealing area of the wind blade mold.
10. The method for manufacturing the wind turbine blade integral molding according to any one of claims 7 to 9, wherein in the step S7, the spanwise backflow channel is put into the composite material, and the composite material flows into the wind turbine blade mold through the vent holes under the air pressure along the chordwise backflow channel and the spanwise backflow channel.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5439635A (en) * | 1993-02-18 | 1995-08-08 | Scrimp Systems, Llc | Unitary vacuum bag for forming fiber reinforced composite articles and process for making same |
| CN1278762A (en) * | 1997-07-25 | 2001-01-03 | Tpi技术公司 | Large composite core structures formed by vacuum assisted resin transfer molding |
| CN101704300A (en) * | 2009-11-12 | 2010-05-12 | 江苏九鼎新材料股份有限公司 | Integral one-step molding technique of wind power blade |
| CN103042701A (en) * | 2012-12-27 | 2013-04-17 | 中国科学院工程热物理研究所 | Integrated formation device and method for wind power blade |
| CN106378942A (en) * | 2016-11-16 | 2017-02-08 | 连云港中复连众复合材料集团有限公司 | Manufacturing and installation method of megawatt-stage wind turbine blade girder cap |
-
2021
- 2021-06-09 CN CN202110641432.0A patent/CN113370555A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5439635A (en) * | 1993-02-18 | 1995-08-08 | Scrimp Systems, Llc | Unitary vacuum bag for forming fiber reinforced composite articles and process for making same |
| CN1278762A (en) * | 1997-07-25 | 2001-01-03 | Tpi技术公司 | Large composite core structures formed by vacuum assisted resin transfer molding |
| CN101704300A (en) * | 2009-11-12 | 2010-05-12 | 江苏九鼎新材料股份有限公司 | Integral one-step molding technique of wind power blade |
| CN103042701A (en) * | 2012-12-27 | 2013-04-17 | 中国科学院工程热物理研究所 | Integrated formation device and method for wind power blade |
| CN106378942A (en) * | 2016-11-16 | 2017-02-08 | 连云港中复连众复合材料集团有限公司 | Manufacturing and installation method of megawatt-stage wind turbine blade girder cap |
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