CN109397722B - Connection method and connection structure of prefabricated web plate and blade shell of wind power blade - Google Patents
Connection method and connection structure of prefabricated web plate and blade shell of wind power blade Download PDFInfo
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- CN109397722B CN109397722B CN201811456932.1A CN201811456932A CN109397722B CN 109397722 B CN109397722 B CN 109397722B CN 201811456932 A CN201811456932 A CN 201811456932A CN 109397722 B CN109397722 B CN 109397722B
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- transition layer
- shell
- airtight
- airtight bonding
- bonding transition
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- 238000000034 method Methods 0.000 title claims abstract description 23
- 230000007704 transition Effects 0.000 claims abstract description 77
- 239000011257 shell material Substances 0.000 claims abstract description 66
- 239000000463 material Substances 0.000 claims abstract description 39
- 238000007789 sealing Methods 0.000 claims abstract description 24
- 239000011347 resin Substances 0.000 claims abstract description 21
- 229920005989 resin Polymers 0.000 claims abstract description 21
- 238000007689 inspection Methods 0.000 claims abstract description 8
- 238000001514 detection method Methods 0.000 claims abstract description 4
- 238000005086 pumping Methods 0.000 claims abstract description 4
- 239000000853 adhesive Substances 0.000 claims description 19
- 230000001070 adhesive effect Effects 0.000 claims description 19
- 239000003365 glass fiber Substances 0.000 claims description 14
- 238000001802 infusion Methods 0.000 claims description 9
- 238000009755 vacuum infusion Methods 0.000 claims description 7
- 239000011162 core material Substances 0.000 claims description 6
- 238000013461 design Methods 0.000 claims description 6
- 239000004744 fabric Substances 0.000 claims description 6
- 239000000047 product Substances 0.000 claims description 6
- 239000003292 glue Substances 0.000 claims description 5
- 238000007711 solidification Methods 0.000 claims description 4
- 230000008023 solidification Effects 0.000 claims description 4
- 239000012467 final product Substances 0.000 claims description 3
- 239000006227 byproduct Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 claims 1
- 230000005611 electricity Effects 0.000 claims 1
- 238000010438 heat treatment Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000011161 development Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000010248 power generation Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005056 compaction Methods 0.000 description 2
- 238000007429 general method Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 239000012945 sealing adhesive Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
- B29C70/36—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and impregnating by casting, e.g. vacuum casting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
-
- 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
-
- 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
Abstract
The invention provides a connecting method and a connecting structure of a prefabricated web plate and a blade shell of a wind power blade, wherein the connecting method comprises the following steps: a first step of: laying a shell material layer on a die; and a second step of: continuously paving an airtight bonding transition layer on the shell material layer paved on the die; and a third step of: after the airtight bonding transition layer is laid, laying an auxiliary material layer on the shell material layer on which the airtight bonding transition layer is not laid; fourth step: vacuum bag sealing, and a fifth step: vacuum pumping and compacting materials in all vacuum bags after sealing; sixth step: vacuum leak detection and inspection; seventh step: after the inspection passes, the blade shell resin is vacuum infused. The method has the advantages that the pouring of the blade shell and the primary bonding of the prefabricated web are synchronously carried out, the bonding mold occupation time can be greatly shortened on the premise of ensuring the bonding quality, the energy is saved, and the conventional two-time curing and heating of bonding are omitted.
Description
Technical Field
The invention relates to the technical field of manufacturing of wind power generation blades, in particular to a connecting method and a connecting structure of a prefabricated web plate and a blade shell of a wind power generation blade.
Background
Wind power blades are important components of wind power generation equipment, and the product quality of the wind power blades has a great influence on the operation of a fan. The manufacturing cycle of the blade is also important to the blade manufacturer.
Under the current situation, most of the global mainstream wind power blade manufacturers perform blade manufacturing by a method of prefabricating two shells by using a vacuum resin infusion method, installing a prefabricated web plate (one or more pieces) on the shells by using an adhesion method (primary adhesion) and solidifying, and then performing die assembly adhesion (secondary adhesion) on an assembly of the two large shells and the web plate by using adhesive. This current general method occupies the main die process and is basically divided into four parts: laying shell structure materials such as glass fiber cloth, core materials, prefabricated parts and the like, vacuum sealing compaction of the shell materials, resin infusion and solidification, primary bonding of prefabricated webs, and die assembly bonding of upper and lower shells. The method has long master mold occupation time, reduces the turnover rate of the master mold, and is a common problem faced by each blade manufacturer.
Disclosure of Invention
The invention provides a connection method of a prefabricated web plate of a wind power blade and a blade shell, which comprises the following steps:
a first step of: laying a shell material layer on a die;
and a second step of: continuously paving an airtight bonding transition layer on the shell material layer paved on the die;
and a third step of: after the airtight bonding transition layer is laid, laying an auxiliary material layer on the shell material layer on which the airtight bonding transition layer is not laid;
fourth step: sealing the vacuum bag, sealing between the edge of the laid airtight bonding transition layer and the vacuum bag, and sealing between the edge of the mould and the vacuum bag, so that the airtight bonding transition layer and the vacuum bag form an airtight bag which completely covers the shell material layer and the auxiliary material layer together, and exposing the adhesive surface of the outer surface of the airtight bonding transition layer;
fifth step: vacuum pumping and compacting materials in all vacuum bags after sealing;
sixth step: vacuum leak detection and inspection;
seventh step: and after the inspection, carrying out vacuum infusion on the resin of the blade shell, and bonding the prefabricated web on the bondable surface of the outer surface of the exposed airtight bonding transition layer while carrying out vacuum infusion on the resin of the blade shell.
As a further development of the invention, in the seventh step, the shell material underneath the air-tight adhesive transition layer is completely impregnated with the resin to be infused, i.e. a subsequent bonding operation of the prefabricated web and other components is performed.
As a further improvement of the invention, in the second step, the air-tight adhesion transition layer is a blade structural material allowed by the product design, the air-tight adhesion transition layer is a part of the final product, and the air-tight adhesion transition layer is a sheet material or a sheet prefabricated material or a film-like material.
As a further development of the invention, in the first step the laying of the layer of casing material comprises the laying of a casing glass fiber cloth, a core material, a prefabricated structural member.
As a further development of the invention, in the third step the laying of the auxiliary material layer comprises the laying of a diversion medium, a porous isolating membrane, a vacuum infusion tube.
As a further development of the invention, in the second step, the shape and placement position of the air-tight adhesive transition layer are placed at the location where the bonding is to be performed after the curing of the shell is required, depending on the product design.
As a further improvement of the invention, in the seventh step, the bondable surface is coated with a bonding paste, and the prefabricated web is bonded to the airtight bonding transition layer by the bonding paste.
The invention also discloses a connecting structure of the prefabricated web plate of the wind power blade and the blade shell, which comprises a shell material layer, an airtight bonding transition layer and the prefabricated web plate, wherein the airtight bonding transition layer is laid on the shell material layer, the airtight bonding transition layer comprises an airtight bonding transition layer inner surface and an airtight bonding transition layer outer surface, the airtight bonding transition layer inner surface and the shell material layer are fixed together through resin infusion and solidification, the airtight bonding transition layer outer surface is an adhesive surface, and the adhesive surface is adhered to the prefabricated web plate.
As a further development of the invention, the bondable surface is coated with a bonding glue, by means of which the prefabricated web is bonded to the air-tight bonding transition layer.
The beneficial effects of the invention are as follows: the invention synchronously carries out the pouring of the blade shell and the primary bonding of the prefabricated web, and the method for manufacturing the butt-joint mode blade can greatly shorten the bonding mold occupying time on the premise of ensuring the bonding quality, saves energy and omits the twice curing and heating of the conventional bonding.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a cross-sectional view of the present invention taken along line A-A' of FIG. 1;
FIG. 3 shows a vacuum resin infusion of the shell of the present invention with a preform web (double web for example)
A bonded structure diagram;
FIG. 4 is a block diagram of the spacing of the prefabricated web and the sealing tape of the present invention;
FIG. 5 is a schematic illustration of the connection of a prefabricated web to a blade shell according to the present invention.
Detailed Description
As shown in fig. 1-4, the invention discloses a method for connecting a prefabricated web 13 of a wind power blade with a blade shell, which comprises the following steps:
a first step of: laying a layer of casing material 10 on a mould 30;
and a second step of: continuing to lay an airtight bonding transition layer 11 on the shell material layer 10 laid on the die 30;
and a third step of: after the airtight bonding transition layer 11 is laid, an auxiliary material layer 21 is laid on the shell material layer 10 on which the airtight bonding transition layer 11 is not laid;
fourth step: sealing the vacuum bag 20, sealing between the edge of the laid airtight bonding transition layer 11 and the vacuum bag 20, and sealing between the edge of the mold 30 and the vacuum bag 20, so that the airtight bonding transition layer 11 and the vacuum bag 20 form an airtight bag completely covering the shell material layer 10 and the auxiliary material layer 21 together, and exposing the bondable surface of the outer surface of the airtight bonding transition layer 11;
fifth step: vacuum pumping after sealing compacts all materials in the vacuum bag 20;
sixth step: vacuum leak detection and inspection;
seventh step: after the inspection, the blade shell resin vacuum infusion is performed, and the prefabricated web 13 is bonded to the bondable surface exposing the outer surface of the airtight bonding transition layer 11 while the blade shell resin is vacuum infused.
In the seventh step, the shell material layer 10 below the air-tight adhesive transition layer 11 is completely impregnated with the resin to be infused, i.e. a subsequent bonding operation of the prefabricated web 13 and other components is performed.
In the second step, the airtight bonding transition layer 11 is a blade structural material allowed by the product design, the airtight bonding transition layer 11 is a part of the final product, and the airtight bonding transition layer 11 is a sheet material or a sheet prefabricated material or a film material.
In the first step, the laying of the layer of casing material 10 includes laying of casing glass fibre cloth, core material, prefabricated structural members etc.
In the third step, the laying of the auxiliary material layer 21 includes laying of a diversion medium, a porous isolation film, a vacuum diversion pipe, or the like.
In the second step, the shape and placement position of the airtight bonding transition layer 11 are placed at a position where bonding is performed after the curing of the case is required according to the product design.
In the second step, the air-tight adhesive transition layer 11 is laid on the area of the prefabricated web 13 that is bonded to the housing.
In the seventh step, the bondable surface is coated with a bonding paste 12, and the preform web 13 is bonded to the airtight bonding transition layer 11 by the bonding paste 12.
The sealing is performed by the sealing tape 22 between the edge of the air-tight adhesion transition layer 11 and the vacuum bag 20, and the sealing is performed by the sealing tape 22 between the edge of the mold 30 and the vacuum bag 20.
The distance between the prefabricated web 13 and the sealing tape 22 is greater than 2cm.
In the second step, a continuous glass fiber mat is laid between the airtight bonding transition layer 11 and the housing material layer 10, and the continuous glass fiber mat plays a role in diversion.
As shown in fig. 5, the invention further discloses a connection structure of the prefabricated web 13 of the wind power blade and the blade shell, which comprises a shell material layer 10, an airtight bonding transition layer 11 and the prefabricated web 13, wherein the airtight bonding transition layer 11 is laid on the shell material layer 10, the airtight bonding transition layer 11 comprises an airtight bonding transition layer inner surface and an airtight bonding transition layer outer surface, the airtight bonding transition layer inner surface and the shell material layer 10 are fixed together through resin infusion and solidification, the airtight bonding transition layer outer surface is an adhesive surface, and the adhesive surface is used for bonding the prefabricated web 13.
The blade shell is formed by pouring and curing a shell material layer 10 and resin.
The bondable surface is coated with a bonding glue 12, and the prefabricated web 13 is bonded to the airtight bonding transition layer 11 through the bonding glue 12.
The airtight bonding transition layer 11 is a sheet material or a film material.
The shell material layer 10 comprises shell glass fiber cloth, a core material and a prefabricated structural member.
The auxiliary material layer 21 comprises a diversion medium, a porous isolating film and a vacuum diversion pipeline.
After the blade shell vacuum resin infusion and curing is completed, the auxiliary material layer 21, the sealant 22 tape and the vacuum bag 20 are removed.
The bondable surface is a clean, roughened surface suitable for bonding.
The connection structure further comprises a glass fiber continuous felt with a diversion function, and the glass fiber continuous felt is laid between the airtight bonding transition layer 11 and the shell material layer 10.
The method for connecting the prefabricated web 13 and the blade shell of the wind power blade comprises the steps of using the airtight bonding transition layer 11, and using the sealing adhesive tape 22 to manufacture the airtight bonding transition layer 11 and the vacuum bag 20 into a complete sealing bag which covers the whole shell material layer 10 and the auxiliary material layer 21, so that the airtight bonding transition layer 11 is a part of a final blade structure and a part playing a role of vacuum sealing in the production process, vacuum compaction and resin infusion are carried out after sealing, and the bonding of the prefabricated web 13 can be carried out during the infusion, thereby enabling the resin vacuum infusion of the blade shell and the bonding process of the prefabricated web 13 to be carried out simultaneously.
The invention aims at the problem of long mold occupation time of the existing method, and mainly provides a new method for connecting the prefabricated web 13 with the shell material layer 10, so that primary bonding and resin pouring and curing of the shell are simultaneously carried out on the premise of ensuring bonding quality (position, thickness and width of the bonding adhesive 12), thereby reducing mold occupation time and reducing the period of primary main mold heating and curing.
The beneficial effects of the invention are as follows: the invention synchronously carries out the pouring of the blade shell and the primary bonding of the prefabricated web, and the method for manufacturing the butt-joint mode blade can greatly shorten the bonding mold occupying time on the premise of ensuring the bonding quality, saves energy and omits the twice curing and heating of the conventional bonding.
The foregoing is a further detailed description of the invention in connection with the preferred embodiments, and it is not intended that the invention be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the invention, and these should be considered to be within the scope of the invention.
Claims (6)
1. The connection method of the prefabricated web plate and the blade shell of the wind power blade is characterized by comprising the following steps of:
a first step of: laying a shell material layer on a die;
and a second step of: continuously paving an airtight bonding transition layer on the shell material layer paved on the die;
and a third step of: after the airtight bonding transition layer is laid, laying an auxiliary material layer on the shell material layer on which the airtight bonding transition layer is not laid;
fourth step: sealing the vacuum bag, sealing between the edge of the laid airtight bonding transition layer and the vacuum bag, and sealing between the edge of the mould and the vacuum bag, so that the airtight bonding transition layer and the vacuum bag form an airtight bag which completely covers the shell material layer and the auxiliary material layer together, and exposing the adhesive surface of the outer surface of the airtight bonding transition layer;
fifth step: vacuum pumping and compacting materials in all vacuum bags after sealing;
sixth step: vacuum leak detection and inspection;
seventh step: after the inspection is passed, carrying out vacuum infusion on the resin of the blade shell, and bonding the prefabricated web on the bondable surface of the outer surface of the exposed airtight bonding transition layer while carrying out vacuum infusion on the resin of the blade shell;
in the seventh step, the shell material layer below the airtight bonding transition layer is completely infiltrated by the resin to be infused, namely, the subsequent bonding work of the prefabricated web and other components is performed;
in the second step, the airtight bonding transition layer is a blade structural material allowed by product design, the airtight bonding transition layer is a part of a final product, and the airtight bonding transition layer is a sheet material or a sheet prefabricated material or a film material;
in the first step, the laying of the shell material layer comprises the laying of shell glass fiber cloth, core materials and prefabricated structural members; in the third step, the laying of the auxiliary material layer comprises the laying of a diversion medium, a porous isolating film and a vacuum diversion pipe;
in the second step, an airtight bonding transition layer is laid at the bonding position of the prefabricated web and the shell.
2. The connection method according to claim 1, characterized in that in the second step, a continuous mat of glass fibers is laid between the airtight bonding transition layer and the shell material layer, the continuous mat of glass fibers serving as a flow guide.
3. The joining method according to claim 1, wherein in the second step, the shape and placement position of the airtight bonding transition layer are placed at a portion where bonding is performed after the case is required to be cured according to the product design.
4. A joining method according to claim 3, wherein in the seventh step, the bondable surface is coated with an adhesive, and the prefabricated web is bonded to the airtight bonding transition layer by the adhesive.
5. A connection structure of prefabricated web and blade shell of wind-powered electricity generation blade, its characterized in that: the airtight bonding transition layer is laid on the shell material layer, the airtight bonding transition layer comprises an airtight bonding transition layer inner surface and an airtight bonding transition layer outer surface, the airtight bonding transition layer inner surface and the shell material layer are fixed together through resin infusion and solidification, the airtight bonding transition layer outer surface is an adhesive surface, and the adhesive surface is adhered to the prefabricated web; the shell material layer comprises glass fiber cloth, a core material and a prefabricated structural member, and the airtight bonding transition layer is made of a sheet material or a sheet prefabricated material or a film material.
6. The connection structure according to claim 5, wherein: the adhesive surface is coated with adhesive glue, and the prefabricated web is adhered to the airtight bonding transition layer through the adhesive glue; the connecting structure further comprises a glass fiber continuous felt with a diversion effect, and the glass fiber continuous felt is laid between the airtight bonding transition layer and the shell material layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811456932.1A CN109397722B (en) | 2018-11-30 | 2018-11-30 | Connection method and connection structure of prefabricated web plate and blade shell of wind power blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811456932.1A CN109397722B (en) | 2018-11-30 | 2018-11-30 | Connection method and connection structure of prefabricated web plate and blade shell of wind power blade |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109397722A CN109397722A (en) | 2019-03-01 |
| CN109397722B true CN109397722B (en) | 2024-02-09 |
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| CN201811456932.1A Active CN109397722B (en) | 2018-11-30 | 2018-11-30 | Connection method and connection structure of prefabricated web plate and blade shell of wind power blade |
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