CN113021916A - Bonding module and size design method thereof, wind power blade and bonding method thereof - Google Patents
Bonding module and size design method thereof, wind power blade and bonding method thereof Download PDFInfo
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- CN113021916A CN113021916A CN202110342231.0A CN202110342231A CN113021916A CN 113021916 A CN113021916 A CN 113021916A CN 202110342231 A CN202110342231 A CN 202110342231A CN 113021916 A CN113021916 A CN 113021916A
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- 238000000034 method Methods 0.000 title claims abstract description 39
- 239000000463 material Substances 0.000 claims abstract description 203
- 239000003292 glue Substances 0.000 claims abstract description 45
- 239000012815 thermoplastic material Substances 0.000 claims abstract description 15
- 229920001187 thermosetting polymer Polymers 0.000 claims abstract description 8
- 239000000853 adhesive Substances 0.000 claims description 32
- 230000001070 adhesive effect Effects 0.000 claims description 32
- 230000005611 electricity Effects 0.000 claims description 15
- 238000010438 heat treatment Methods 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 6
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims description 4
- 229920002689 polyvinyl acetate Polymers 0.000 claims description 4
- 239000011118 polyvinyl acetate Substances 0.000 claims description 4
- 229920006332 epoxy adhesive Polymers 0.000 claims description 3
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 3
- 229920002635 polyurethane Polymers 0.000 claims description 3
- 239000004814 polyurethane Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 12
- 239000010410 layer Substances 0.000 description 158
- 229920001971 elastomer Polymers 0.000 description 16
- 230000000903 blocking effect Effects 0.000 description 14
- 238000002360 preparation method Methods 0.000 description 7
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- 238000000576 coating method Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
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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
- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/08—Blades for rotors, stators, fans, turbines or the like, e.g. screw propellers
- B29L2031/082—Blades, e.g. for helicopters
- B29L2031/085—Wind turbine blades
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Abstract
The invention provides a bonding module and a size design method thereof, a wind power blade and a bonding method thereof, wherein the bonding module is suitable for bonding the wind power blade, the wind power blade comprises a first bonding part and a second bonding part, the bonding module comprises a first material layer, the first material layer comprises a first surface and a second surface, the first surface and the second surface are provided with a second material layer, the first material layer is made of a thermosetting material, the second material layer is made of a thermoplastic material, the second material layer on the first surface is suitable for bonding the first bonding part, and the second material layer on the second surface is suitable for bonding the second bonding part. The bonding module is suitable for a splicing type arrangement mode, bonding glue does not need to be coated manually in a bonding area, and bonding efficiency is improved; meanwhile, when the bonding module is used for bonding the wind power blade, the inner cavity of the shell of the wind power blade is not easy to generate residual glue blocks, so that the bonding effect is guaranteed, the problem that the residual glue blocks cannot be completely removed does not exist, and the safety factor of the running of the unit is improved.
Description
Technical Field
The invention relates to the technical field of wind power blades, in particular to a bonding module and a size design method thereof, a wind power blade and a bonding method thereof.
Background
Wind turbine blades capture wind energy by means of their special aerodynamic profile and convert it into mechanical energy. The wind power blade is used as a component for capturing wind energy of the wind generating set, plays an extremely important role in the wind generating set, and the root of the wind power blade is connected with the hub through a bolt and is directly stressed on the set. The upper shell and the lower shell of the blade and the web are bonded together by using a bonding adhesive, whether the front edge and the rear edge of the blade are easy to fatigue crack in the operation process of the blade depends on the bonding strength of the bonding adhesive to a great extent, and the bonding strength meeting the design requirement not only depends on the composition and the bonding process of the bonding adhesive, but also depends on the thickness and the width of the bonding adhesive.
In order to avoid the phenomenon of glue shortage, more allowance of bonding glue is usually coated on a bonding area, so that uncured glue liquid can be extruded to two sides of the bonding area in the die assembly process of the blade, one part of the uncured glue liquid is extruded to the outer side of the blade, the other part of the uncured glue liquid is extruded to the inner part of the blade, and the uncured glue liquid is remained in the blade. Before the adhesive is cured, the extruded adhesive needs to be cleaned, otherwise, the residual adhesive blocks can cause fatal damage to the unit once the adhesive blocks fall off in the long-term operation process of the unit. And the more the blade is toward the blade tip, the narrower the space is, people can only enter about 1/3 areas to clean the residual glue solution, and the difficulty in cleaning the glue solution in other 2/3 areas is high, so that the residual glue solution cannot be completely removed, and huge quality hidden troubles exist. In addition, the adhesive paste needs to be manually coated according to the shape of the adhesive area, and the structure of the adhesive area is complicated, resulting in low coating efficiency, thereby reducing the adhesive efficiency.
Disclosure of Invention
Therefore, the invention aims to overcome the defects that residual rubber blocks are generated during the bonding of the existing wind power blade, the residual rubber blocks are difficult to completely remove, and the bonding efficiency is low, and provides a bonding module and a size design method thereof, a wind power blade and a bonding method thereof.
For this purpose, the invention provides a bonding module, which is suitable for bonding a wind power blade, wherein the wind power blade comprises a first bonding portion and a second bonding portion, the bonding module comprises a first material layer, the first material layer comprises a first surface and a second surface, the first surface and the second surface are provided with a second material layer, the first material layer is made of a thermosetting material, the second material layer is made of a thermoplastic material, the second material layer on the first surface is suitable for bonding the first bonding portion, and the second material layer on the second surface is suitable for bonding the second bonding portion.
Optionally, the first material layer further has a third surface and a fourth surface that are oppositely disposed, the third surface and the fourth surface are provided with a second material layer, and the third surface and the fourth surface are disposed at two ends of the bonding module in the length direction.
Optionally, the first material layer further has a fifth surface, the fifth surface is connected to the first surface and the second surface, the fifth surface is suitable for facing the inner cavity of the wind turbine blade shell, and the fifth surface is provided with a glue blocking portion.
Optionally, the ratio of the thickness H of the second material layer to the thickness H of the bonding module is 0.25 to 0.5.
Optionally, the first surface and/or the second surface of the first material layer is provided with protrusions.
Optionally, the thermosetting material is an epoxy adhesive, a phenolic adhesive or a polyurethane adhesive; the thermoplastic material is a polyvinyl acetate adhesive or an acrylate adhesive.
The invention also provides a bonding method of the wind power blade, which comprises the following steps: providing a first bonding part, a second bonding part and a plurality of bonding modules, wherein the first bonding part comprises a first bonding surface, and the second bonding part comprises a second bonding surface; assembling the first bonding part and the second bonding part, wherein the first bonding surface and the second bonding surface are oppositely arranged to form a bonding area; arranging a plurality of bonding modules which are sequentially arranged along the extending direction of the bonding area in the bonding area, wherein a second material layer positioned on the first surface of the first material layer is in contact with the first bonding surface, and a second material layer positioned on the second surface of the first material layer is in contact with the second bonding surface; and heating the bonding module, cooling to room temperature after the second material layer is softened, so that the second material layer on the first surface is bonded with the first bonding part, and the second material layer on the second surface is bonded with the second bonding part.
The invention also provides a wind power blade which comprises a first bonding part, a second bonding part and a plurality of bonding modules, wherein the first bonding part comprises a first bonding surface, the second bonding part comprises a second bonding surface, and the first bonding surface and the second bonding surface are oppositely arranged and form a bonding area; the bonding area is provided with a plurality of edges the extending direction of the bonding area is arranged in sequence the bonding module is positioned on the first surface of the first material layer, the second material layer is adhered to the first adhering surface, and the second material layer is adhered to the second adhering surface of the first material layer.
Optionally, the number of the bonding modules arranged in the bonding area is 4-20.
The invention also provides a size design method of the bonding module, which comprises the following steps: modeling a bonding area of the wind power blade; segmenting the model of the bonding area to obtain a plurality of sub bonding segments; designing the bonding module according to the shape and the length of the sub bonding section; obtaining a sectional area of the bonding module perpendicular to a length direction of the bonding module by using the following formula:
in the formula, S is the sectional area of the bonding module perpendicular to the length direction of the bonding module, V is the required amount of bonding glue, and L is the length of the bonding module.
Optionally, the width of the bonding module is the same as the bonding width of the sub-bonding section, and the thickness of the bonding module is obtained by using the following formula:
wherein D is the width of the bonding module, and H is the thickness of the bonding module.
The technical scheme of the invention has the following advantages:
1. the bonding module provided by the invention comprises a first material layer, wherein a first surface and a second surface of the first material layer, which are oppositely arranged, are provided with second material layers to form a sandwich structure, the first material layer is made of a thermosetting material, and the second material layer is made of a thermoplastic material. The second material layer has been given the attribute that the bonding module is heated the softening and can bond, will when the bonding module is used for wind power blade subassembly's bonding, only need with a plurality of the bonding module set gradually in between first bonding portion and the second bonding portion, and make on the first surface the second material layer bonds first bonding portion, the second is on the surface the second material layer bonds the bonding of wind power blade subassembly can be accomplished to the second bonding portion, promptly, the bonding module is suitable for the mode that sets up of concatenation formula, and the bonding region need not artifical coating bonding glue, has improved bonding efficiency. The area between the first bonding part and the second bonding part is partially occupied by the solid first material layer, so that the second material layer does not need to fill the whole bonding area, the using amount of the second material layer is reduced, the flow area of the softened second material layer is also reduced due to the arrangement of the first material layer, and the second material layer is difficult to overflow the bonding area in the bonding process due to the small flow area and the small using amount, so that residual rubber blocks are difficult to generate in the inner cavity of the wind power blade shell, the problem that the residual rubber blocks cannot be completely removed manually is avoided while the bonding effect is ensured, and the safety coefficient of unit operation is improved; meanwhile, the residual rubber block does not need to be removed additionally, so that the bonding efficiency is further improved.
2. According to the bonding module provided by the invention, the first material layer is also provided with a third surface and a fourth surface which are oppositely arranged, the third surface and the fourth surface are provided with the second material layers, and the adjacent bonding modules are connected into a whole through the second material layer on the third surface or the second material layer on the fourth surface, so that the stability of a bonding structure is improved, and the overall stability of a wind power blade is further improved.
3. In the bonding module provided by the invention, the second material layer is made of a polyvinyl acetate adhesive or an acrylate adhesive. In the bonding process of the wind power blade, the area between the first surface of the first material layer and the to-be-bonded surface of the first bonding part and the area between the second surface of the first material layer and the to-be-bonded surface of the second bonding part form a flowing area after the second material layer is softened, because the material is solidified and softened at a lower shrinkage rate, the flowing area can be filled up by the softened second material layer after heating, and the flowing area can be filled up by the solidified second material layer after cooling, so that the bonding strength of the bonding module and the wind power blade is ensured, and the bonding effect is further ensured.
4. According to the bonding method of the wind power blade, the manual coating of the bonding glue is replaced by the splicing type arrangement mode of the bonding modules, the bonding efficiency is improved, and the bonding method is simple; meanwhile, residual rubber blocks are not easy to generate in the inner cavity of the wind power blade shell by using the bonding module, so that the bonding effect is ensured, and the problem that the residual rubber blocks cannot be completely removed manually is avoided, so that the safety coefficient of unit operation is improved; in addition, the method for bonding the wind power blade does not need to additionally remove the residual rubber blocks, and further improves bonding efficiency.
5. The invention provides a wind power blade which comprises a first bonding part, a second bonding part and a bonding module; because first bonding portion, bonding region between the second bonding portion has been occupied partly by solid-state first material layer, consequently, the second material layer need not to fill up whole bonding region, thereby the quantity of second material layer has been reduced, the setting on first material layer has also reduced the flow region after the second material layer softens, and less flow region and less quantity make the second material layer difficult overflow to inside or the blade outside of blade in bonding process, difficult inside and the outside production at wind-powered electricity generation blade glue the piece, thereby when guaranteeing the bonding effect, do not have the problem that the piece can't be got rid of completely to remain, consequently, the factor of safety of unit operation has been improved.
6. According to the size design method of the bonding module, accurate three-dimensional information of the bonding area is obtained by modeling the bonding area of the wind power blade, the bonding area is segmented to obtain a plurality of sub bonding sections, the bonding module is designed according to the shapes and the lengths of the sub bonding sections, and the sectional area of the bonding module, which is perpendicular to the length direction of the bonding module, is calculated, so that the size of the bonding module is accurately designed, the bonding module has good bonding performance, the bonding effect of the wind power blade is guaranteed, the amount of bonding glue used by the bonding module is controlled, the bonding cost is reduced, and the generation of residual glue blocks is avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic structural diagram of a bonding module in an embodiment of the invention;
FIG. 2 is a schematic side view of a wind turbine blade according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a bonding module of the trailing edge of the wind turbine blade in the embodiment of the invention;
FIG. 4 is a schematic structural diagram of a bonding module for a leading edge of a wind turbine blade according to an embodiment of the invention.
Description of reference numerals:
1-a bonding module; 11-a first layer of material; 12-a second layer of material; 2-a first bonding portion; 3-a second bonding portion.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," "fourth," and "fifth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The reagents used are not indicated by manufacturers, and are all conventional reagent products which can be obtained commercially.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Referring to fig. 1, this embodiment provides a bonding module 1, bonding module 1 is suitable for the bonding of wind-powered electricity generation blade, wind-powered electricity generation blade includes first bonding portion 2 and second bonding portion 3, specifically, first bonding portion 2 and second bonding portion 3 can be respectively wind-powered electricity generation blade's last casing and lower casing, also can be respectively wind-powered electricity generation blade's last casing and web, also can be respectively wind-powered electricity generation blade's lower casing and web, also can divide into two arbitrary subassemblies that need bond each other of wind-powered electricity generation blade. The bonding module 1 comprises a first material layer 11, the first material layer 11 comprises at least a first surface and a second surface, the first surface and the second surface are respectively provided with a second material layer 12, wherein the first material layer 11 is made of a thermosetting material, the second material layer 12 is made of a thermoplastic material, the second material layer 12 on the first surface is suitable for bonding the first bonding part 2, and the second material layer 12 on the second surface is suitable for bonding the second bonding part 3.
In the above-mentioned bonding module 1, second material layer 12 has given bonding module 1 is heated the softening attribute that can bond, see fig. 2, will bonding module 1 only needs to be a plurality of when being used for wind-powered electricity generation blade subassembly's bonding module 1 set gradually in between first bonding portion 2 and the second bonding portion 3, and make on the first surface second material layer 12 bonds first bonding portion 2, on the second surface second material layer 12 bonds the bonding of two wind-powered electricity generation blade subassemblies can be accomplished to second bonding portion 3, promptly, bonding module is suitable for the mode that sets up of concatenation formula, and the bonding region need not artifical coating bonding glue, has improved bonding efficiency. Because the area between the first bonding part 2 and the second bonding part 3 is partially occupied by the solid first material layer 11, the second material layer 12 does not need to fill the whole bonding area, so that the using amount of the second material layer 12 is reduced, the setting of the first material layer 11 also reduces the flow area of the softened second material layer 12, and the smaller flow area and the smaller using amount ensure that the second material layer 12 is not easy to overflow the bonding area in the bonding process, so that residual rubber blocks are not easy to generate in the inner cavity of the wind power blade shell, the problem that the residual rubber blocks cannot be completely removed is avoided while the bonding effect is ensured, and the safety coefficient of unit operation is improved; meanwhile, the residual rubber block does not need to be removed additionally, so that the bonding efficiency is further improved.
Further, the first bonding portion 2 has a first bonding surface, and the second bonding portion 3 has a second bonding surface, wherein the first bonding surface and the second bonding surface at least partially define a bonding area.
Further, the first material layer 11 of the bonding module 1 further has a third surface and a fourth surface which are oppositely arranged, the third surface and the fourth surface are respectively provided with a second material layer 12, the third surface and the fourth surface are arranged at two ends of the bonding module 1 in the length direction, namely, the second material layer 12 of the third surface of the bonding module 1 is connected with the second material layer 12 of the fourth surface of the adjacent bonding module 1, and the second material layer 12 of the fourth surface of the bonding module 1 is connected with the second material layer 12 of the third surface of the adjacent bonding module 1, so that the adjacent bonding modules 1 can be connected into a whole, thereby improving the stability of the bonding structure and further improving the overall stability of the wind power blade.
Further, the first material layer 11 of the bonding module 1 has other surfaces, and a part of the other surfaces is also provided with the second material layer 12. When all surfaces of the first material layer 11 of the bonding module 1 are provided with the second material layer 12, i.e. the first material layer 11 of the bonding module 1 is wrapped by the second material layer 12.
It is to be understood that the length direction of the adhesive module 1 in this application is the same as the extension direction of the adhesive area.
In the present embodiment, the ratio of the thickness H of the second material layer 12 to the thickness H of the bonding module 1 is 0.25-0.5. The thickness h of the second material layer 12 determines, on the one hand, the amount of material used to form the second material layer 12 and the bonding strength, and on the other hand, the flow area of the second material layer 12 after heat softening when the bonding module 1 is used for bonding a wind turbine blade. By limiting the thickness of the second material layer 12 to the above thickness, on the basis of ensuring good bonding strength, the use amount of the material forming the second material layer 12 is controlled, and the flow area of the second material layer 12 after being heated and softened is also controlled, so that the flowability of the second material layer 12 after being heated and softened is smaller, the second material layer is difficult to overflow to the inside or the outside of the blade in the bonding process, and residual rubber blocks are difficult to generate in the inside and the outside of the wind power blade, and the problem that the residual rubber blocks cannot be removed is avoided while the bonding effect is ensured, so that the safety factor of unit operation is improved; meanwhile, the residual rubber block does not need to be additionally removed, and the bonding efficiency is improved.
As an alternative embodiment, the first surface and/or the second surface of the first material layer 11 is provided with protrusions, and the height of the protrusions is smaller than or equal to the thickness h of the second material layer on the surface. The protrusions are able to maintain the bonding gap between the first material layer 11 and the first bond 2 and/or the second bond 3 when the second material layer 12 becomes molten or soft flowing. Specifically, the material of the protrusions may be the same as that of the first material layer, and the number of the protrusions is at least one. In one embodiment, a plurality of protrusions are arranged on the first surface and the second surface of the first material layer 11, and a second material layer 12 is arranged on the first surface and the second surface, the second material layer 12 on the first surface is suitable for bonding the first bonding part 2, the second material layer 12 on the second surface is suitable for bonding the second bonding part 3, when the bonding module 1 is heated, the second material layer 12 becomes molten or softened and flows, and the protrusions can maintain the bonding gap between the first material layer 11 and the first bonding part 2 and the second bonding part 3.
As an alternative embodiment, the first material layer 11 further has a fifth surface, the fifth surface connects the first surface and the second surface, the fifth surface is adapted to face the inner cavity of the wind turbine blade shell, and the fifth surface is provided with a glue blocking portion (not shown in the figure). Specifically, the glue blocking portion and the first material layer 11 may be an integral body, and at this time, the glue blocking portion and the first material layer 11 are made of the same material; the glue blocking part can also be arranged on the fifth surface of the first material layer 11 independently of the first material layer 11, and at this time, the glue blocking part is made of fiber material; the fiber material includes, but is not limited to, fiberglass cloth or fiber reinforced material.
Further, the coverage area of the glue blocking portion is larger than the surface area of the fifth surface, and is approximately the surface area of the bonding module 1 facing the inner cavity of the blade shell, so that the glue blocking portion can cover the portion, facing the inner cavity of the blade shell, of the second material layer 12 on the other surface of the first material layer 11, the flow of the material of the second material layer 12 facing the inner cavity of the blade shell after being heated and softened is limited, the flowability of the second material layer 12 is further reduced, and the softened second material layer 12 is prevented from flowing to the inner cavity of the blade shell, so that a residual glue block is generated.
In this embodiment, the thermoset material includes, but is not limited to, an epoxy adhesive, a phenolic adhesive, or a polyurethane adhesive; the thermoplastic material includes, but is not limited to, a polyvinyl acetate adhesive or an acrylate adhesive. In the bonding process of the wind power blade assembly, the area between the first surface of the first material layer 11 and the to-be-bonded surface of the first bonding part 2 and the area between the second surface of the first material layer 11 and the to-be-bonded surface of the second bonding part 3 form a flow area after the second material layer 12 is softened, and because the solidification and softening shrinkage rate of the materials is low, the flow area can be filled up by the softened second material layer 12 after heating, and the flow area can be filled up by the solidified second material layer 12 after cooling, so that the bonding effect is ensured.
In this embodiment, the bonding module 1 may have a regular three-dimensional structure or an irregular three-dimensional structure, and the specific structure is determined by the shape of the bonding region. Illustratively, the cross section of the first material layer 11 along a direction perpendicular to the length direction of the bonding module 1 is a pattern defined by three lines or a pattern defined by four lines, and the lines are straight lines or curved lines bent in one direction.
Specifically, when the cross section of the first material layer 11 in the width direction is a figure surrounded by three lines, the three lines correspond to the first surface, the second surface and the fifth surface of the first material layer 11 respectively, when the bonding module 1 is used for bonding the wind power blade, one of the second material layer 12 arranged on the first surface and the second material layer 12 arranged on the second surface is used for bonding with the first bonding part 2, the other one is used for bonding with the second bonding part 3, and the glue blocking part on the fifth surface faces the inner side of the wind power blade; further, when the glue blocking portion is not integrated with the first material layer 11, the second material layer 12 or the adhesive layer may be disposed between the fifth surface and the glue blocking portion, and since the adhesive module 1 of this structure has no special limitation on the formation area of the second material layer 12, the second material layer 12 may be directly formed on the surface of the first material layer 11 after the preparation of the first material layer 11 is completed during the preparation, and the preparation method is not required to be performed in different areas, so that the preparation method is simpler.
When the bonding module 1 is used for bonding the wind power blade, one of a second material layer 12 arranged on the first surface and a second material layer 12 arranged on the second surface is used for bonding a first bonding part 2, and the other is used for bonding a second bonding part 3, a glue blocking part on the fifth surface faces the inner side of the wind power blade, and the sixth surface faces the outer side of the wind power blade; further, when the glue blocking portion is not integrated with the first material layer 11, the second material layer 12 may be disposed between the fifth surface and the glue blocking portion, and the second material layer 12 may be disposed on the sixth surface, and since the forming area of the second material layer 12 is not particularly limited by the bonding module 1 with this structure, the second material layer 12 may be directly formed on the surface of the first material layer 11 after the first material layer 11 is completely prepared during preparation, and the preparation method is simpler because the preparation method does not need to be performed in different areas.
The embodiment also provides a bonding method of the wind power blade, which comprises the following steps: providing a first bonding part 2, a second bonding part 3 and a plurality of bonding modules 1, wherein the first bonding part 2 comprises a first bonding surface, and the second bonding part 3 comprises a second bonding surface; assembling the first bonding part 2 and the second bonding part 3, wherein the first bonding surface and the second bonding surface are oppositely arranged and form a bonding area; arranging a plurality of bonding modules 1 which are sequentially arranged along the extending direction of the bonding region in the bonding region, wherein a second material layer 12 positioned on the first surface of a first material layer 11 in any bonding module 1 is in contact with the first bonding surface, and a second material layer 12 positioned on the second surface of the first material layer 11 is in contact with the second bonding surface; and heating the bonding module 1, cooling to room temperature after the second material layer 12 is softened, so that the second material layer 12 on the first surface is bonded with the first bonding part 2, and the second material layer 12 on the second surface is bonded with the second bonding part 3.
According to the bonding method of the wind power blade, the manual coating of the bonding glue is replaced by the splicing type arrangement mode of the bonding modules, the bonding efficiency is improved, and the bonding method is simple; meanwhile, residual glue blocks are not easy to generate in the inner cavity of the wind power blade shell by using the bonding module, so that the bonding effect is ensured, and the problem that the residual glue blocks cannot be removed is avoided, so that the safety coefficient of unit operation is improved; in addition, the method for bonding the wind power blade does not need to additionally remove the residual rubber blocks, and further improves bonding efficiency.
Further, the heating temperature is 50-100 ℃, and the time is 5-10 h.
In this embodiment, first bonding portion 2 and second bonding portion 3 can be respectively for the last casing and the lower casing of wind-powered electricity generation blade, also can be respectively for the last casing and the web of wind-powered electricity generation blade, also can be respectively for the lower casing and the web of wind-powered electricity generation blade, also can divide into the arbitrary two subassemblies that need bond each other of wind-powered electricity generation blade.
Referring to fig. 2, the invention further provides a wind power blade, which comprises a first bonding part 2, a second bonding part 3 and a plurality of bonding modules 1. The first bonding part 2 comprises a first bonding surface, the second bonding part 3 comprises a second bonding surface, and the first bonding surface and the second bonding surface are oppositely arranged and form a bonding area; the bonding area is provided with a plurality of edges the extending direction of the bonding area is arranged in sequence the bonding module 1 is positioned on the first surface of the first material layer 11, the second material layer 12 is adhered to the first bonding surface, and the second material layer 12 is adhered to the second bonding surface of the first material layer 11.
Above-mentioned wind turbine blade, because first bonding portion 2, bonding region between the second bonding portion 3 has been occupied partly by solid-state first material layer 11, consequently, second material layer 12 need not to fill up whole bonding region, thereby the quantity of second material layer 12 has been reduced, the mobile region after second material layer 12 softens has also been reduced in the setting of first material layer 11, and less mobile region and less quantity make second material layer 12 be difficult for spilling over bonding region in bonding process, thereby difficult glue piece is remained in the inner chamber production of wind turbine blade casing, finally when guaranteeing the bonding effect, the problem that the piece can't be got rid of is avoided remaining, consequently, the factor of safety of unit operation has been improved.
Further, the number of the bonding modules 1 disposed in the bonding area is 4 to 20. The number of the bonding modules 1 depends on the length of the bonding area and the complexity of the shape, the size of the bonding module 1 in the area with the complex shape is smaller, the size of the bonding module 1 in the area with the simple shape can be slightly larger, and the specific number of the bonding modules 1 can be selected according to the actual situation.
The embodiment also provides a size design method of the bonding module, which comprises the following steps:
(1) modeling a bonding area of the wind power blade;
(2) segmenting the bonding area to obtain a plurality of sub bonding segments;
(3) designing the bonding module 1 according to the shape and the length of the sub bonding section;
(4) the sectional area of the bonding module 1 perpendicular to the length direction of the bonding module is obtained by the following formula:
in the formula, S is a sectional area of the bonding module 1 perpendicular to the length direction of the bonding module, V is a required amount of bonding glue, and L is the length of the bonding module 1.
According to the size design method of the bonding module, accurate three-dimensional information of the bonding area is obtained by modeling the bonding area of the wind power blade, the bonding area is segmented to obtain a plurality of sub bonding sections, then the bonding module is designed according to the shapes and the lengths of the sub bonding sections and is perpendicular to the bonding module, the sectional area of the bonding module in the length direction is calculated, the accurate design of the size of the bonding module is achieved, on one hand, the bonding module has good bonding performance, the bonding effect of the wind power blade is guaranteed, on the other hand, the amount of bonding glue of the bonding module is controlled, so that the bonding cost is reduced, and the generation of residual glue blocks is also avoided.
In the step (1), modeling is carried out on the bonding area of the wind power blade so as to obtain accurate three-dimensional information of the bonding area.
Specifically, a three-dimensional scanner can be adopted to measure the shape and thickness of an actual bonding area, so as to obtain the size of the bonding area, and model the bonding area; or the size of the bonded area may be extracted from the original parameters of the blade design.
In the step (2), segmentation is performed according to the shape and the bonding width of the bonding area so as to divide the part with the similar shape in the bonding area into a sub bonding section.
Specifically, the processing difficulty of the bonding module, the maximum transportation size and the optimal storage size of the bonding module, and the like need to be considered in the segmentation process, so that the processing, transportation and storage of the bonding module are facilitated. Taking an 80m long blade as an example, the distribution of the bonding width dimension of the trailing edge and the arrangement of the bonding modules 1 can be shown in table 1:
TABLE 1
| Distance from blade root (m) | Bonding width (mm) | Segment label |
| 8 | 250 | ① |
| 16 | 250 | ② |
| 18 | 300 | ③ |
| 32 | 300 | ④ |
| 34 | 275 | ⑤ |
| 40 | 245 | ⑥ |
| 50 | 150 | ⑦ |
| 60 | 105 | ⑧ |
| 80 | 40 | ⑨ |
In step (3), the bonding module 1 is designed according to the shape and length of the sub-bonding section.
Specifically, the curing property and the bonding margin of the thermoplastic material are also required to be combined when designing the bonding module 1. This is because the thermoplastic material is heated from a solid state to a molten state and then cooled to a solid state, and the shrinkage rate of the thermoplastic material changes slightly, thereby affecting the final volume of the adhesive module 1; in order to ensure the filling integrity of the bonding material in the bonding area, the thermoplastic material is added with a small bonding allowance, and the small bonding allowance can offset the volume change generated by the shrinkage rate of the thermoplastic material and can ensure that the filling integrity of the bonding area is maintained under the condition of not generating a large amount of residual rubber blocks. Thus, the bonding module 1 has a shape and a length similar to those of the sub-bonding sections, and the volume of the bonding module 1 is slightly larger than that of the corresponding sub-bonding section.
In the step (4), the bonding module 1 has a shape substantially similar to the shape of the sub-bonding segment, and since the shape of the sub-bonding segment is irregular, the cross section of the bonding module 1 perpendicular to the longitudinal direction of the bonding module is not necessarily a regular shape, and thus the specific size of the cross section of the bonding module 1 perpendicular to the longitudinal direction of the bonding module is accurately calculated by calculating and measuring a model.
Specifically, when the cross section of the bonding module 1 perpendicular to the length direction of the bonding module is rectangular, the width of the bonding module 1 is the same as the bonding width of the sub-bonding section, and the thickness of the bonding module 1 is obtained by using the following formula:
where D is the width of the adhesive module 1 and H is the thickness of the adhesive module 1.
It should be understood that, in designing, the bonding area may be segmented and the segments may be marked; designing and preparing the bonding modules 1 according to the shapes and sizes of the sections, and marking bonding areas corresponding to the prepared bonding modules 1; when the wind power blade is bonded, the bonding module 1 is arranged in a corresponding bonding area according to the mark; heating is then carried out, and heating is stopped after the second material layer 12 is softened, and cooling is carried out to room temperature.
Taking the blade trailing edge as an example, the size design method of the bonding module 1 for the blade trailing edge comprises the following steps:
s1, modeling a bonding area of the rear edge of the wind power blade;
specifically, modeling is carried out on the trailing edge of the blade, wherein the space left by removing structures such as a layer and a core material in the three-dimensional space of the trailing edge of the blade is the area to be bonded of the trailing edge of the blade.
And S2, segmenting the bonding area of the blade trailing edge to obtain a plurality of sub bonding sections of the blade trailing edge.
S3, designing the bonding module 1 according to the shape and the length of the sub bonding section of the blade trailing edge and combining the curing property of the thermoplastic material and the bonding allowance, enabling the bonding module 1 to have the shape and the length approximately similar to those of the sub bonding section of the blade trailing edge, and enabling the volume of the bonding module 1 to be slightly larger than that of the corresponding sub bonding section;
specifically, the bonding area is segmented according to the shape and the bonding width of the bonding area, and the number of the bonding area segments on the trailing edge of the blade is 4-10.
S4, obtaining the sectional area of the bonding module 1 perpendicular to the length direction of the bonding module by adopting the following formula:
in the formula, S is a sectional area of the bonding module 1 perpendicular to the length direction of the bonding module, V is a required amount of bonding glue, and L is the length of the bonding module 1.
When the section of the bonding module 1 perpendicular to the longitudinal direction of the bonding module is not a regular shape and the bonding area of the trailing edge of the blade is divided into 4 sections in step S2, the bonding module 1 as shown in fig. 3 is designed.
Method for dimensioning a bonding module 1 for a blade leading edge, comprising the steps of:
s1, modeling a bonding area of the front edge of the wind power blade;
specifically, modeling is carried out on the leading edge of the blade, wherein the space left by removing structures such as a layer and a core material in the three-dimensional space of the leading edge of the blade is the region to be bonded of the leading edge of the blade.
And S2, segmenting the bonding area of the front edge of the blade to obtain a plurality of sub-bonding sections of the front edge of the blade.
S3, designing the bonding module 1 according to the shape and the length of the sub bonding section of the blade front edge and combining the curing property of the thermoplastic material and the bonding allowance, so that the bonding module 1 has the shape and the length approximately similar to those of the sub bonding section of the blade front edge, and the volume of the bonding module 1 is slightly larger than that of the corresponding sub bonding section;
specifically, segmentation is carried out according to the shape and the bonding width of the bonding area, and the number of the bonding area segments of the front edge of the blade is 4-10.
S4, the sectional area of the bonding module 1 perpendicular to the length direction of the bonding module is obtained by adopting the following formula:
in the formula, S is a sectional area of the bonding module 1 perpendicular to the length direction of the bonding module, V is a required amount of bonding glue, and L is the length of the bonding module 1.
When the section of the bonding module 1 perpendicular to the longitudinal direction of the bonding module is not a regular shape and the bonding area of the leading edge of the blade is divided into 4 sections in step S2, the bonding module 1 as shown in fig. 4 is designed.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (11)
1. The utility model provides a bonding module, its characterized in that, bonding module is suitable for the bonding of wind-powered electricity generation blade, wind-powered electricity generation blade includes first bonding portion and second bonding portion, bonding module includes first material layer, first material layer includes first surface and second surface, first surface and second surface are provided with the second material layer, wherein, first material layer is thermosetting material, the second material layer is thermoplastic material, on the first surface the second material layer is suitable for the bonding first bonding portion, on the second surface the second material layer is suitable for the bonding the second bonding portion.
2. The bonding module of claim 1, wherein the first material layer further has third and fourth oppositely disposed surfaces, the third and fourth surfaces being disposed with the second material layer, the third and fourth surfaces being disposed at opposite ends of the bonding module in a length direction.
3. The bonding module of claim 2, wherein the first material layer further has a fifth surface connecting the first surface and the second surface, the fifth surface adapted to face the inner cavity of the wind blade housing, the fifth surface being provided with a glue stop.
4. A bonding module according to any of claims 1-3, characterized in that the ratio of the thickness H of the second material layer to the thickness H of the bonding module is 0.25-0.5.
5. A bonding module according to any of claims 1-3, wherein the first and/or second surface of the first material layer is provided with protrusions.
6. The bonding module of any one of claims 1-3, wherein the thermosetting material is an epoxy adhesive, a phenolic adhesive, or a polyurethane adhesive; the thermoplastic material is a polyvinyl acetate adhesive or an acrylate adhesive.
7. The bonding method of the wind power blade is characterized by comprising the following steps:
providing a first bonding portion comprising a first bonding surface, a second bonding portion comprising a second bonding surface, and a plurality of bonding modules according to any of claims 1-6;
assembling the first bonding part and the second bonding part, wherein the first bonding surface and the second bonding surface are oppositely arranged to form a bonding area;
arranging a plurality of bonding modules which are sequentially arranged along the extending direction of the bonding area in the bonding area, wherein a second material layer positioned on the first surface of the first material layer is in contact with the first bonding surface, and a second material layer positioned on the second surface of the first material layer is in contact with the second bonding surface;
and heating the bonding module, cooling to room temperature after the second material layer is softened, so that the second material layer on the first surface is bonded with the first bonding part, and the second material layer on the second surface is bonded with the second bonding part.
8. A wind power blade is characterized by comprising a first bonding part, a second bonding part and a plurality of bonding modules according to any one of claims 1 to 6, wherein the first bonding part comprises a first bonding surface, the second bonding part comprises a second bonding surface, and the first bonding surface and the second bonding surface are arranged oppositely to form a bonding area; the bonding area is provided with a plurality of edges the extending direction of the bonding area is arranged in sequence the bonding module is positioned on the first surface of the first material layer, the second material layer is adhered to the first adhering surface, and the second material layer is adhered to the second adhering surface of the first material layer.
9. The wind blade according to claim 8, wherein the number of the bonding modules arranged in the bonding region is 4-20.
10. A method of dimensioning a splice module according to any of claims 1-5, characterized by the steps of:
modeling a bonding area of the wind power blade;
segmenting the model of the bonding area to obtain a plurality of sub bonding segments;
designing the bonding module according to the shape and the length of the sub bonding section;
obtaining a sectional area of the bonding module perpendicular to a length direction of the bonding module by using the following formula:
in the formula, S is the sectional area of the bonding module perpendicular to the length direction of the bonding module, V is the required amount of bonding glue, and L is the length of the bonding module.
11. The method of claim 10, wherein the width of the bonding module is the same as the bonding width of the sub-bonding section, and the thickness of the bonding module is obtained by using the following equation:
wherein D is the width of the bonding module, and H is the thickness of the bonding module.
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