CN109732806B - Pultrusion piece for wind power blade, pouring method for wind power blade and wind power blade - Google Patents
Pultrusion piece for wind power blade, pouring method for wind power blade and wind power blade Download PDFInfo
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- CN109732806B CN109732806B CN201910114787.7A CN201910114787A CN109732806B CN 109732806 B CN109732806 B CN 109732806B CN 201910114787 A CN201910114787 A CN 201910114787A CN 109732806 B CN109732806 B CN 109732806B
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000011347 resin Substances 0.000 claims abstract description 38
- 229920005989 resin Polymers 0.000 claims abstract description 38
- 230000001154 acute effect Effects 0.000 claims description 20
- 239000011162 core material Substances 0.000 claims description 9
- 230000010412 perfusion Effects 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 239000004744 fabric Substances 0.000 claims description 3
- 238000001802 infusion Methods 0.000 claims description 2
- 239000011152 fibreglass Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 4
- 230000007547 defect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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Abstract
The invention discloses a pultrusion piece for a wind power blade, a pouring method for the wind power blade and the wind power blade. The pultrusion piece is prism, and the section of the pultrusion piece in the thickness direction is parallelogram. The pouring method of the wind power blade comprises the following steps: arranging the pultruded pieces together in a mode of splicing the splicing surfaces together, wherein the adjacent splicing surfaces are parallel, a through seam is formed between the splicing surfaces, and the pultruded pieces are piled up layer by layer to ensure that the piling surfaces are on the same plane; infusing resin from the lowest point of the highest layer of the pultrudate. The method for pouring the wind power blade can enhance the strength of the through seam, reduce the risk of resin reverse wrapping of the pultruded part and improve the overall strength and pouring effect of the main beam.
Description
Technical Field
The invention relates to a pultrusion piece of a wind power blade, a pouring method of the wind power blade and the wind power blade.
Background
At present, the demand for clean energy is increasing in various countries in the world, and wind power as one of the clean energy is rapidly developed. The wind generating set with a large wind wheel diameter becomes the mainstream technical trend in the field of wind power, and the increase of the length of the blade puts new requirements on the structural design and the manufacturing process of the blade.
The wind power blade is generally composed of an upper shell and a lower shell to form an external outline, the interior of the wind power blade is loaded by a main beam-web structure, and the main beam is a main load-bearing component. Along with the increase of the length of the blade, the load borne by the main beam is also increased continuously, and the requirement on the main beam is higher and higher.
The plate used as the main beam structure has the advantages of excellent mechanical property and simple processing method, and the plate is earlier used in the field of building reinforcement, such as bridge repair and the like, and the structural strength of a repair area is enhanced by pasting a solidified plate on the repair area. The use of plates as pultrusion parts and the stacking of the plates to form reinforced structural parts is an important technical idea for designing large blades in the field of wind power.
The pultruded parts in wind turbine blades are usually rectangular solids, and as shown in fig. 1, the pultruded parts 1 'are spliced together when stacked to form a main beam, and vertical through seams 2' are formed between the spliced surfaces. After infusion molding, the through-seam locations are filled with resin, but the resin is significantly less rigid and stronger than the pultrusion, thereby creating a weak area in the spar article. The vertical through seam 2 'is unfavorable for the stress of a pultrusion piece, and the bending resistance and the shearing resistance of the main beam can be greatly weakened by the vertical through seam 2'.
In addition, as shown in fig. 1, in the pouring process, a flow channel is formed in the receiving platform 3' after the resin flows into the through seam, the pouring speed in the region is high, and the resin flows from the left side to the right side and also flows from the right side to the left side. The resin flows from the right side to the left side and easily forms a reverse bag below the tensile extrusion piece, so that the perfusion defect is easily caused.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a pultrusion piece for a wind power blade, a pouring method for the wind power blade and the wind power blade.
The invention solves the technical problems through the following technical scheme: a pultrudate for a wind turbine blade, characterized in that the pultrudate is prism shaped with a cross-section in the thickness direction of the pultrudate being parallelogram shaped.
Preferably, the upper right corner and the lower left corner of the parallelogram are acute angles, and the acute angles are provided with chamfers.
Preferably, the pultrusion piece is provided with a splicing surface, and a part of the splicing surface corresponding to the acute angle is provided with an inclined surface.
Preferably, the splicing surface is two surfaces which are opposite to each other.
The invention also provides a method for pouring the wind power blade, which is characterized by comprising the following steps:
s1, respectively chamfering the left side surface and the right side surface of the prism pultrusion piece from top to bottom to form a splicing surface, so that the cross section of the pultrusion piece in the thickness direction is in a parallelogram shape;
s2, arranging the pultruded pieces together in a mode of splicing the splicing surfaces together, enabling the adjacent splicing surfaces to be parallel, forming a through seam between the splicing surfaces, stacking the pultruded pieces layer by layer upwards to ensure that the stacking surfaces are on a plane, and enabling a part corresponding to an obtuse angle of the parallelogram on the lower layer and a part corresponding to an acute angle of the parallelogram on the upper layer to form a bearing platform;
and S3, pouring the resin from the lowest point of the highest layer piled by the pultruded parts, wherein the resin flows obliquely upwards, flows downwards to the through seam, flows into the through seam, flows onto the receiving platform of the second layer along the through seam, then a part of the resin moves from left to right along the receiving platform, and another part of the resin continues to flow downwards onto the receiving platform of the third layer, and the resin flows according to the rule until flows onto the receiving platform of the lowest layer.
Preferably, the step S1 further includes the steps of: and the upper right corner and the lower left corner of the parallelogram are acute angles, and the acute angles are chamfered.
Preferably, the step S1 further includes the steps of: and manufacturing a part of the splicing surface corresponding to the acute angle into an inclined surface. Therefore, the range of the receiving platform is enlarged, and more resin can be accommodated.
Preferably, the step S2 further includes the steps of: stacking the pultrusion in a main beam mold; the step S3 is followed by the following steps: and pouring to form an integral bearing structural part, placing the bearing structural part in a blade mould, and integrally pouring and curing the bearing structural part, the paving layer and the core material to form the whole blade shell.
Preferably, the step S2 further includes the steps of: stacking the pultruded part in a blade mould, and paving a paving layer and a core material in the blade mould; the step S3 further includes the steps of: and integrally pouring and curing the pultrusion piece, the paving layer and the core material to form the whole blade shell.
Preferably, the layer is glass fiber cloth.
The invention also provides a wind power blade which is characterized by being manufactured by the pouring method of the wind power blade.
The positive progress effects of the invention are as follows: through the pultrusion of parallelogram cross section to guarantee that adjacent concatenation face is parallel and pile the face on a plane, avoided weak logical seam at a perpendicular cross section, increased adjacent two bonding area of pultrusion in addition, promoted the bulk strength of girder. In the pouring process, the resin flows down from last, and when reaching the accepting platform of lower floor after leading to the seam, partial resin flows from a left side to the right, and another partial resin continues to flow downwards, so accepting the platform and can significantly reduce from the resin that the right side flows to the left, speed also can slow down to reduce the risk of the anti-package of left side pultrusion, promote the pouring effect of girder.
Drawings
Fig. 1 is a schematic diagram of a perfusion method of a wind turbine blade in the prior art.
Fig. 2 is a schematic structural view of a pultrudate for a wind turbine blade according to embodiment 1 of the present invention.
Fig. 3 is a schematic view of a method for pouring a wind turbine blade according to embodiment 1 of the present invention.
Fig. 4 is an enlarged view of a portion a of fig. 3.
Description of reference numerals:
pultrudate 1'
2 'of through slot'
Carry platform 3'
Chamfer 2
Inclined plane 3
Splicing surface 4
Through seam 5
Receiving platform 6
Lowest point 7
Piling surface 8
Resin flow direction 9
Detailed Description
The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention.
Example 1
As shown in fig. 2 and 3, the pultruded part 1 of the present invention is a prism, the cross section of the pultruded part 1 in the thickness direction is a parallelogram, the cross section of the parallelogram can ensure that an inclined through seam 5 can be formed during later stacking, the upper right corner and the lower left corner of the parallelogram are acute angles, the acute angle of the parallelogram is provided with a chamfer 2, and the chamfer at the acute angle can ensure that a receiving platform 6 can be better formed during subsequent resin injection. Alternatively, the acute corners of the parallelogram may be free of chamfers 2. For better impregnation of the pultrusion 1, the pultrusion has a splicing surface 4, the part of the splicing surface 4 corresponding to the acute angle having an inclined surface 3. Preferably, the splicing face 4 is two oppositely located surfaces.
Through the pultrusion of parallelogram cross section to guarantee that adjacent concatenation face is parallel and pile the face on a plane, avoided weak logical seam at a perpendicular cross section, increased adjacent two bonding area of pultrusion in addition, promoted the bulk strength of girder.
As shown in fig. 3 and 4, the invention provides a method for pouring a wind turbine blade, which specifically comprises the following steps:
s1, respectively chamfering the left side surface and the right side surface of the prism pultruded piece 1 from top to bottom to form a splicing surface 4, so that the cross section of the pultruded piece 1 in the thickness direction is in a parallelogram shape; in order to expand the range of the receiving platform 6 and accommodate more resin, the step S1 may further include: the upper right corner and the lower left corner of the parallelogram are acute angles, the acute angles of the parallelogram are chamfered, and the part of the splicing surface corresponding to the acute angles is made into an inclined surface 3;
s2, arranging the pultruded parts 1 together in a mode of splicing the splicing surfaces 4 together, enabling the adjacent splicing surfaces 4 to be parallel, forming through seams 5 between the splicing surfaces 4, wherein the through seams 5 are inclined through seams, so that the overall strength of the main beam can be improved, stacking the pultruded parts 1 layer by layer upwards, ensuring that the stacking surfaces 8 are on one plane, and forming a bearing platform 6 by the part corresponding to the obtuse angle of the parallelogram at the lower layer and the part corresponding to the acute angle of the parallelogram at the upper layer; to fabricate the wind blade, step S2 may further include: stacking the pultrudates 1 in a main beam mold;
s3, pouring resin from the lowest point 7 of the highest layer of the stacked pultruded pieces 1, wherein the resin flows obliquely upwards along the arrow in FIG. 3, flows to the through seam 5, flows downwards along the arrow in FIG. 3 to the through seam 5, flows to the receiving platform 6 on the second layer along the through seam 5, then a part of the resin moves from left to right along the receiving platform 6 along the arrow in FIG. 3, the other part of the resin continues to flow downwards to the receiving platform 6 on the third layer, the resin flow direction 9 also shows the flow direction of the resin, the resin flows according to the rule and flows to the receiving platform 6 on the lowest layer, and the flow of the resin can greatly reduce the resin flowing from right to left on the receiving platform 6, so that the risk of reverse wrapping of the pultruded pieces 1 on the left side is reduced; in order to manufacture the wind power blade, the following steps may be further included after the step S3: and (3) pouring to form an integral bearing structural member through a vacuum pouring process, placing the bearing structural member in the blade mould, and integrally pouring and curing the bearing structural member, the paving layer and the core material to form the whole blade shell.
Preferably, the ply is a glass cloth. Alternatively, other materials may be used for the ply.
In the pouring process, the resin flows down from last, and when reaching the accepting platform of lower floor after leading to the seam, partial resin flows from a left side to the right, and another partial resin continues to flow downwards, so accepting the platform and can significantly reduce from the resin that the right side flows to the left, speed also can slow down to reduce the risk of the anti-package of left side pultrusion, promote the pouring effect of girder.
The wind power blade can be applied to a wind generating set and can apply the wind generating set to a wind power generation field.
Example 2
The procedure of this example is substantially the same as that of example 1, except that: to fabricate the wind blade, step S2 may further include: stacking the pultruded part 1 in a blade mould, and paving a paving layer and a core material in the blade mould; step S3 may be followed by the following steps: and integrally pouring and curing the pultruded part, the paving layer and the core material through a vacuum pouring process to form the whole blade shell.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.
Claims (7)
1. The method for pouring the wind power blade is characterized by comprising the following steps of:
s1, respectively chamfering the left side surface and the right side surface of the prism pultrusion piece from top to bottom to form a splicing surface, so that the cross section of the pultrusion piece in the thickness direction is in a parallelogram shape;
s2, arranging the pultruded pieces together in a mode of splicing the splicing surfaces together, enabling the adjacent splicing surfaces to be parallel, forming a through seam between the splicing surfaces, stacking the pultruded pieces layer by layer upwards to ensure that the stacking surfaces are on a plane, and enabling a part corresponding to an obtuse angle of the parallelogram on the lower layer and a part corresponding to an acute angle of the parallelogram on the upper layer to form a bearing platform;
and S3, pouring the resin from the lowest point of the highest layer piled by the pultruded parts, wherein the resin flows obliquely upwards, flows downwards to the through seam, flows into the through seam, flows onto the receiving platform of the second layer along the through seam, then a part of the resin moves from left to right along the receiving platform, and another part of the resin continues to flow downwards onto the receiving platform of the third layer, and the resin flows according to the rule until flows onto the receiving platform of the lowest layer.
2. The perfusion method of the wind turbine blade as claimed in claim 1, wherein the step S1 further comprises the steps of: and the upper right corner and the lower left corner of the parallelogram are acute angles, and the acute angles are chamfered.
3. The perfusion method of the wind turbine blade as claimed in claim 1, wherein the step S1 further comprises the steps of: and manufacturing a part of the splicing surface corresponding to the acute angle into an inclined surface.
4. The perfusion method of the wind turbine blade as claimed in claim 1, wherein the step S2 further comprises the steps of: stacking the pultrusion in a main beam mold;
the step S3 is followed by the following steps: and pouring to form an integral bearing structural part, placing the bearing structural part in a blade mould, and integrally pouring and curing the bearing structural part, the paving layer and the core material to form the whole blade shell.
5. The perfusion method of the wind turbine blade as claimed in claim 1, wherein the step S2 further comprises the steps of: stacking the pultruded part in a blade mould, and paving a paving layer and a core material in the blade mould;
the step S3 further includes the steps of: and integrally pouring and curing the pultrusion piece, the paving layer and the core material to form the whole blade shell.
6. A method for pouring a wind turbine blade according to claim 4 or 5 wherein the lay-up is fiberglass cloth.
7. Wind turbine blade, characterized in that it is manufactured using the method of infusion of a wind turbine blade according to any of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910114787.7A CN109732806B (en) | 2019-02-14 | 2019-02-14 | Pultrusion piece for wind power blade, pouring method for wind power blade and wind power blade |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910114787.7A CN109732806B (en) | 2019-02-14 | 2019-02-14 | Pultrusion piece for wind power blade, pouring method for wind power blade and wind power blade |
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| CN109732806A CN109732806A (en) | 2019-05-10 |
| CN109732806B true CN109732806B (en) | 2021-06-04 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110500242B (en) * | 2019-08-26 | 2020-11-03 | 上海电气风电集团股份有限公司 | Main beam of wind power blade and method for laying core material and plate of main beam |
| CN110836165B (en) * | 2019-11-22 | 2023-11-17 | 中材科技风电叶片股份有限公司 | Strip-shaped piece, manufacturing method, beam, manufacturing method, blade and wind turbine generator |
| CN111255639A (en) * | 2020-01-21 | 2020-06-09 | 上海电气风电集团股份有限公司 | Bearing structural member for wind power blade and preparation method thereof |
| CN113021677B (en) * | 2021-03-02 | 2022-11-01 | 三一重能股份有限公司 | Pultruded main beam, blade and manufacturing method of blade |
| CN114953522A (en) * | 2022-06-10 | 2022-08-30 | 南通艾郎风电科技发展有限公司 | Wind power blade pultrusion glass plate edge chamfering device |
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2019
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Address after: 200233 Caobao Road, Xuhui District, Shanghai, No. 115 Applicant after: Shanghai Electric Wind Power Group Co., Ltd Address before: 200233 Caobao Road, Xuhui District, Shanghai, No. 115 Applicant before: Shanghai Electric Wind Power Group Co., Ltd. |
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