CN117382221A - Interlayer pouring structure and pouring method of carbon pultrusion girder of wind power blade - Google Patents
Interlayer pouring structure and pouring method of carbon pultrusion girder of wind power blade Download PDFInfo
- Publication number
- CN117382221A CN117382221A CN202311342090.8A CN202311342090A CN117382221A CN 117382221 A CN117382221 A CN 117382221A CN 202311342090 A CN202311342090 A CN 202311342090A CN 117382221 A CN117382221 A CN 117382221A
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- Prior art keywords
- carbon
- girder
- carbon pultrusion
- pultrusion
- interlayer
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Links
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 89
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 87
- 239000011229 interlayer Substances 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000000605 extraction Methods 0.000 claims abstract description 30
- 238000002347 injection Methods 0.000 claims abstract description 24
- 239000007924 injection Substances 0.000 claims abstract description 24
- 238000005086 pumping Methods 0.000 claims description 14
- 239000010410 layer Substances 0.000 claims description 11
- 239000004744 fabric Substances 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 4
- 238000001802 infusion Methods 0.000 claims description 3
- 230000010412 perfusion Effects 0.000 claims description 3
- 239000012528 membrane Substances 0.000 claims description 2
- 150000001721 carbon Chemical class 0.000 claims 2
- 239000011347 resin Substances 0.000 description 19
- 229920005989 resin Polymers 0.000 description 19
- 230000007547 defect Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 239000003292 glue Substances 0.000 description 3
- 230000008595 infiltration Effects 0.000 description 3
- 238000001764 infiltration Methods 0.000 description 3
- 238000009659 non-destructive testing Methods 0.000 description 2
- 239000002390 adhesive tape Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 230000001932 seasonal effect Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification 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
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/42—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
- B29C70/44—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using isostatic pressure, e.g. pressure difference-moulding, vacuum bag-moulding, autoclave-moulding or expanding rubber-moulding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/08—Blades for rotors, stators, fans, turbines or the like, e.g. screw propellers
- B29L2031/082—Blades, e.g. for helicopters
- B29L2031/085—Wind turbine blades
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Composite Materials (AREA)
- Mechanical Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses an interlayer pouring structure and a pouring method of a carbon pultrusion girder of a wind power blade, wherein the structure comprises a flow guide net, an air exhaust bag and an air injection pipe, the carbon pultrusion girder is formed by stacking carbon pultrusion plates, splicing seams are arranged between the carbon pultrusion plates, one side of the carbon pultrusion girder is a fixed flange, and the other side of the carbon pultrusion girder is an air exhaust side; the guide net extends from the fixed flange to the air extraction side, is respectively arranged above and below the carbon pultrusion girder, and the guide net positioned above does not cross the splice seam nearest to the fixed flange, and the end part of the guide net positioned below is arranged between the two splice seams nearest to the air extraction side; the air exhaust bag is arranged above the carbon pultrusion girder and covers all the splice seams; the rubber injection pipe is arranged on the guide net at the fixed flange. The invention can reduce the occurrence rate of interlayer dry yarns and realize the high pouring success rate of the carbon pultrusion girder.
Description
Technical Field
The invention belongs to the technical field of wind power equipment, and particularly relates to an interlayer pouring structure and a pouring method of a carbon pultrusion girder of a wind power blade.
Background
With the development of the blade industry, the blades are gradually enlarged, and the carbon pultrusion girder gradually moves to the stage of the blade industry. Carbon pultruded girders are favored by various blade designers because of their light weight, good performance, and the like. However, because the design is characterized in that a layer of biaxial carbon cloth is paved between the pultrusion plates, the design is very challenging when the skin pouring process is designed, the more the chord direction blocks of the pultrusion plates are, the more the layers are, the more complicated the glue is removed by the pultrusion Liang Cengjian during pouring, and the assembly consistency of the pultrusion girder is poor, so that the pouring difficulty of the carbon pultrusion girder is very high, and the problem of interlayer dry yarn of the carbon pultrusion girder is very urgent to solve. The common main girder pouring scheme is that the upper surface and the lower surface are fully paved with flow guide nets, a 200-300 air pumping bag is additionally arranged on the air pumping side, and the scheme has low applicability to the carbon pultrusion main girder and almost 100% of interlayer dry yarn probability.
Disclosure of Invention
The technical problems to be solved are as follows: aiming at the technical problems, the invention provides an interlayer pouring structure and a pouring method of a carbon pultrusion girder of a wind power blade, which can reduce the occurrence rate of interlayer dry yarns and realize the high pouring success rate of the carbon pultrusion girder.
The technical scheme is as follows: the interlayer pouring structure of the carbon pultrusion girder of the wind power blade comprises a flow guide net, an air exhaust bag and an air injection pipe, wherein the carbon pultrusion girder is formed by stacking carbon pultrusion plates, a splicing seam is arranged between the carbon pultrusion plates, one side of the carbon pultrusion girder is a fixed flange, and the other side of the carbon pultrusion girder is an air exhaust side; the guide net extends from the fixed flange to the air extraction side, is respectively arranged above and below the carbon pultrusion girder, and the guide net positioned above does not cross the splice seam nearest to the fixed flange, and the end part of the guide net positioned below is arranged between the two splice seams nearest to the air extraction side; the air exhaust bag is arranged above the carbon pultrusion girder and covers all the splice seams; the rubber injection pipe is arranged on the guide net at the fixed flange.
Preferably, the pumping bag is made of a VAP film.
Preferably, the end of the suction bag on the suction side does not pass over the edge of the carbon pultruded girder.
Preferably, the infusion structure and the carbon pultruded girders are completely covered by a vacuum film.
Preferably, the edges of the carbon pultruded panels are provided with chamfers.
Preferably, interlayer carbon cloth is laid between the carbon pultrusion plate layers.
The pouring method of the interlayer pouring structure based on the wind power blade carbon pultrusion girder comprises the following steps:
firstly, laying a diversion net above a girder die, and then sequentially laying a carbon pultrusion plate, an air extraction bag and an injection pipe according to an injection structure;
step two, vacuum-pumping a main beam area formed by the pouring structure and the carbon pultrusion main beam;
and thirdly, maintaining the pressure of the main beam area, opening the rubber injection pipe after the pressure maintaining, and exhausting air at the air exhaust side, wherein the pouring material is poured from one side of the fixed flange to the air exhaust side through the guide net.
Preferably, interlayer carbon cloth is laid between the carbon pultrusion plate layers in the first step.
Preferably, the end of the pumping bag on the pumping side in the first step does not cross the edge of the carbon pultrusion girder.
Preferably, in the second step, the main beam area is covered by a vacuum film.
The beneficial effects are that: the pouring structure designed by the invention can be adapted to the girder die with a single side fixed flange, and can reduce the occurrence rate of interlayer dry yarns, thereby realizing a high pouring success rate of more than 99% of carbon pultrusion girders.
In the traditional pouring scheme, resin is pushed to an air extraction side from the upper surface and the lower surface, the pushing speed of the resin is higher on the upper surface and the lower surface, meanwhile, due to the structural characteristics of the pultrusion plate, more resin passages exist between splicing seams, the flow speed of the resin is not controlled up and down, reverse wrapping among plates is caused, and finally pouring dry yarns are easy to form. According to the invention, the air extraction bag is arranged above the carbon pultrusion girder and covers all the splice joints, the guide net extends from the fixed flange to the air extraction side, the rubber injection pipe is arranged on the guide net at the fixed flange, the resin injection material is injected from one side of the fixed flange to the air extraction side, the resin positioned above and below the girder can keep unidirectional flow from one side of the fixed flange to the air extraction side due to negative pressure suction of the air extraction side and blocking influence of the air extraction bag on the splice joints, and infiltration effect is achieved by means of infiltration of the resin below the girder between the layers, so that back-packing between carbon pultrusion boards can be prevented, and dry yarn injection is reduced.
In the traditional pouring scheme, the flow guide net is of a full-spread structure, resin can quickly rise along the vertical face after reaching the air extraction side, and the defect that two sides of the girder in the width direction are mutually wrapped is formed. According to the invention, the upper diversion net does not cross the splice joint closest to the fixed flange, the end part of the lower diversion net is arranged between the two splice joints closest to the air extraction side, namely, a smaller part of diversion net is arranged above and a large number of air extraction bags are arranged, so that the air covering of the upper surface resin from top to bottom is reduced; the flow guiding net is interrupted when the resin below is about to reach the nearest splice joint of the air extraction side, so that the flow speed of the resin below the main beam can be controlled, and the occurrence of the defect that two sides of the main beam are mutually wrapped in the width direction is prevented.
The traditional pouring scheme uses double-side flanges, so that the resin trend of the two side vertical surfaces is uncontrolled, and the resin trend cannot be observed, so that the resin flow rate cannot be controlled, and defects are generated. According to the invention, one side of the carbon pultrusion girder is the fixed flange, the other side is the air extraction side, and the flow guide net extends from the fixed flange to the air extraction side, so that the girder can be conveniently positioned and the resin trend can be conveniently observed on the side of the non-fixed flange. The resin flows unidirectionally from the fixed flange to the air extraction side, so that the resin flow rate can be adjusted by adjusting the distance between the guide net and the air extraction side and controlling the glue injection rate, and the defect is prevented.
Drawings
FIG. 1 is a schematic diagram of the perfusion configuration of the present invention;
the numerical references in the drawings are as follows: 1. a flow guiding net; 2. a gas pumping bag; 3. a rubber injection pipe; 4. a carbon pultrusion plate; 5. a vacuum membrane; 6. interlayer carbon cloth.
Detailed Description
The invention is further described below with reference to the drawings and specific embodiments.
Example 1
As shown in fig. 1, the interlayer pouring structure of the carbon pultrusion girder of the wind power blade comprises a diversion net 1, an air extraction bag 2 and an injection pipe 3. The carbon pultrusion girder is formed by stacking carbon pultrusion plates 4, a splicing seam is arranged between the carbon pultrusion plates 4, one side of the carbon pultrusion girder is a fixed flange (right side in the figure), and the other side is an air extraction side (left side in the figure).
The diversion net 1 extends from the fixed flange to the air exhaust side and is respectively arranged above and below the carbon pultrusion girder. The guide net 1 positioned above does not cross the splice joint closest to the fixed flange, and the length of the guide net above the main beam corresponds to L2 in the figure; the end of the diversion net 1 positioned below is arranged between the two splicing seams closest to the air extraction side, and the distance between the end and the air extraction side corresponds to L3 in the figure.
The air extraction bag 2 is made of a VAP film, is arranged above the carbon pultrusion girder, and covers all the splice seams. The end of the pumping bag 2 on the pumping side does not cross the edge of the carbon pultrusion girder, and the distance between the end and the pumping side corresponds to L1 in the figure.
The rubber injection pipe 3 is arranged on the flow guide net 1 at the fixed flange.
The main beam area formed by the pouring structure and the carbon pultrusion main beam is completely covered by the vacuum film 5.
The pouring method of the interlayer pouring structure based on the wind power blade carbon pultrusion girder comprises the following steps:
cutting a carbon pultrusion plate 4 by using a pultrusion line according to the design requirement of a main beam, and chamfering and polishing the starting and ending positions of the edge of the carbon pultrusion plate 4; and stacking the carbon pultrusion plates 4 block by block after cutting, laying a layer of interlayer carbon cloth 6 between every two layers, and adhering and putting tightly without gaps between every two layers. And laying a diversion net 1 above the main beam die to serve as a diversion medium under the beam. The actual arrangement can be fine-tuned according to the resin gel trend, seasonal temperature, and shape of the carbon pultrusion panel 4 during the infusion process. Placing the carbon pultrusion plate 4 with the plate on a main beam die, and then sequentially laying an air pumping bag 2 and an injection tube 3 according to an injection structure;
covering a main beam area formed by the pouring structure and the carbon pultrusion main beam with a vacuum film 5, adhering the vacuum film 5 by using an adhesive tape, and vacuumizing the main beam area;
and thirdly, maintaining the pressure of the main beam area, opening the rubber injection pipe 3 after the pressure maintaining, and exhausting air on the air exhaust side to form negative pressure, wherein the resin injection material is injected from one side of the fixed flange to the air exhaust side through the guide net 1.
After the pouring method is adopted to finish the complete infiltration of all cloth layers and the carbon pultrusion plate 4, the glue injection pipe 3 is cut off, and the product is heated and solidified. And after solidification, stripping, and using nondestructive testing to perform interlayer pouring, wherein finally the carbon pultrusion girder of the wind power blade prepared by the invention has good pouring result through nondestructive testing, and the carbon pultrusion girder has no dry yarn between 4 layers.
Claims (10)
1. The interlayer pouring structure of the carbon pultrusion girder of the wind power blade is characterized by comprising a diversion net (1), an air exhaust bag (2) and an air injection pipe (3), wherein the carbon pultrusion girder is formed by stacking carbon pultrusion plates (4), splicing seams are formed between the carbon pultrusion plates (4), one side of the carbon pultrusion girder is a fixed flange, and the other side of the carbon pultrusion girder is an air exhaust side; the guide net (1) extends from the fixed flange to the air extraction side, is respectively arranged above and below the carbon pultrusion girder, the guide net (1) positioned above does not cross the splice seam nearest to the fixed flange, and the end part of the guide net (1) positioned below is arranged between the two splice seams nearest to the air extraction side; the air extraction bag (2) is arranged above the carbon pultrusion girder and covers all the spliced seams; the rubber injection pipe (3) is arranged on the guide net (1) at the fixed flange.
2. The interlayer pouring structure of a wind power blade carbon pultrusion girder according to claim 1, characterized in that the air extraction bag (2) adopts a VAP film.
3. The interlayer pouring structure of a carbon pultrusion girder of a wind power blade according to claim 1, characterized in that the end of the suction bag (2) on the suction side does not cross the edge of the carbon pultrusion girder.
4. The interlayer perfusion structure of a wind turbine blade carbon pultrusion spar according to claim 1, characterized in that the perfusion structure and the carbon pultrusion spar are completely covered by a vacuum film (5).
5. The interlayer pouring structure of a carbon pultrusion girder of a wind power blade according to claim 1, characterized in that the edges of the carbon pultrusion plate (4) are provided with chamfers.
6. The interlayer pouring structure of the wind power blade carbon pultrusion main beam according to claim 1, characterized in that interlayer carbon cloth (6) is laid between the carbon pultrusion plates (4).
7. The method for pouring the interlayer pouring structure of the wind power blade carbon pultrusion girder according to claim 1, which is characterized by comprising the following steps:
firstly, laying a diversion net (1) above a main beam die, and then sequentially laying a carbon pultrusion plate (4), an air extraction bag (2) and an injection tube (3) according to an injection structure;
step two, vacuum-pumping a main beam area formed by the pouring structure and the carbon pultrusion main beam;
and thirdly, maintaining the pressure of the main beam area, opening the rubber injection pipe (3) after the pressure maintaining, and exhausting air at the air exhaust side, wherein the pouring material is poured from one side of the fixed flange to the air exhaust side through the guide net (1).
8. The pouring method according to claim 7, wherein the carbon pultrusion plate (4) in the first step is laid with an interlayer carbon cloth (6) between the layers.
9. The method according to claim 7, wherein the end of the pumping bag (2) on the pumping side does not pass over the edge of the carbon pultrusion girder in the first step.
10. The infusion method according to claim 7, wherein in step two the main beam area is covered by a vacuum membrane (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311342090.8A CN117382221A (en) | 2023-10-17 | 2023-10-17 | Interlayer pouring structure and pouring method of carbon pultrusion girder of wind power blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311342090.8A CN117382221A (en) | 2023-10-17 | 2023-10-17 | Interlayer pouring structure and pouring method of carbon pultrusion girder of wind power blade |
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| Publication Number | Publication Date |
|---|---|
| CN117382221A true CN117382221A (en) | 2024-01-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311342090.8A Pending CN117382221A (en) | 2023-10-17 | 2023-10-17 | Interlayer pouring structure and pouring method of carbon pultrusion girder of wind power blade |
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|---|---|
| CN (1) | CN117382221A (en) |
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