CN112537050A - Manufacturing method of wind power blade main beam - Google Patents
Manufacturing method of wind power blade main beam Download PDFInfo
- Publication number
- CN112537050A CN112537050A CN202011308515.XA CN202011308515A CN112537050A CN 112537050 A CN112537050 A CN 112537050A CN 202011308515 A CN202011308515 A CN 202011308515A CN 112537050 A CN112537050 A CN 112537050A
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- China
- Prior art keywords
- main beam
- core material
- wind power
- manufacturing
- shaped grooves
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
- B29C70/36—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and impregnating by casting, e.g. vacuum casting
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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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- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/30—Wind power
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Composite Materials (AREA)
- Mechanical Engineering (AREA)
- Wind Motors (AREA)
Abstract
The invention relates to a method for manufacturing a main beam of a wind power blade, which comprises the following steps of a) paving fiber fabrics in a cavity of a main beam mold, wherein the size of the fiber fabrics is consistent with that of the main beam, and the cavity is filled in the chord direction; b) placing core materials on two sides of a main beam mold and tightly attaching the core materials to front and rear edge vertical surfaces of the main beam mold; a plurality of V-shaped grooves extending along the length direction of the core material are processed on the core material, the V-shaped grooves are positioned on the inner surface of the core material, and the distance between the V-shaped grooves and the bottom of the core material is 3-5 mm; c) hanging the main beam sheet into a main beam mould, attaching the vertical surface of the main beam to the core material, and controlling the width of a contraction opening of the V-shaped groove to be less than 2 mm; d) a flow guide medium and a glue injection system are arranged on the surfaces of the main beam and the core material; e) guiding a flow guide medium into the main beam by using vacuum pressure to enable the main beam sheet and the core material to form a whole, so as to obtain a wind power blade main beam; the invention enables the mould, the core material and the plate girder to be spliced at any vertical edge angle, avoids the defect of relevant rich resin and improves the efficiency.
Description
Technical Field
The invention belongs to the technical field of wind power blades, and particularly relates to a manufacturing method of a wind power blade main beam.
Background
Because of the special-shaped surfaces of the main beam of the wind power blade, the curvatures of all the sections are different, and the upper curved surface and the lower curved surface are inconsistent when the plates are stacked, the design of the inclination angle of the vertical edge of the die is difficult. The conventional method is to neglect the problem that the lower surface and the beam edge of the main beam of the plate are not conformal due to the chord-wise arc of the main beam, or to design a plurality of molds with different vertical surface angles, wherein the core material is matched with the stacked plates, or fabrics are filled among the molds, the core material and the plates. If the problem that the lower surface and the beam edge are not conformal is ignored, resin is rich in the area during pouring, and the rigidity of the main beam and the bonding strength between the main beam and the sandwich are reduced. If a multi-angle vertical surface mold and a core material are adopted, the design difficulty and the workload are high, the fabric filling amount is difficult to determine, and the filling reduces the production efficiency.
Disclosure of Invention
The invention aims to solve the technical problem of providing a method for manufacturing a main beam of a wind power blade, which enables a mould, a core material and a main beam of a splicing plate at any vertical edge angle to be free from the defect of rich resin and improves the efficiency.
The invention relates to a method for manufacturing a main beam of a wind power blade, which comprises the following steps,
a) laying fiber fabrics in a cavity of the main beam mold, wherein the size of the fiber fabrics is consistent with that of the main beam, and the cavity is filled in the chord direction;
b) placing core materials on two sides of a main beam mold and tightly attaching the core materials to front and rear edge vertical surfaces of the main beam mold; a plurality of V-shaped grooves extending along the length direction of the core material are processed on the core material, the V-shaped grooves are positioned on the inner surface of the core material, and the distance between the V-shaped grooves and the bottom of the core material is 3-5 mm; the inner surface refers to the surface of the sandwich facing a laying worker, and the inner surface and the outer surface are consistent relative to the inner skin and the outer skin;
c) hanging the main beam sheet into a main beam mould, attaching the vertical surface of the main beam to the core material, and controlling the width of a contraction opening of the V-shaped groove to be less than 2 mm; when the width of the contraction opening is larger than 2mm, filling the contraction opening with the core material of the same material until the width of the contraction opening is smaller than 2 mm;
d) a flow guide medium and a glue injection system are arranged on the surfaces of the main beam and the core material;
e) and guiding the guide medium into the main beam by utilizing vacuum pressure to enable the main beam sheet and the core material to form a whole, so as to obtain the wind power blade main beam.
Preferably, the V-shaped grooves are arranged in the range of 0-150mm of the core material, the opening width of each V-shaped groove is 3-8mm, and the number of the V-shaped grooves is 2-10.
And c) filling, wherein the used material is the same as that of the core material, and the shape of the core material is strip.
The invention has the advantages that the plurality of V-shaped grooves are formed in the core material, so that the mould, the core material and the spliced plate girder with any vertical edge angle can be shaped, the defect of rich resin is avoided, and the problems of matching between the chord-direction multi-pultrusion sheet spliced girder and the surface radian of the mould, the vertical edge angle of the core material and injection molding are solved. The design difficulty and workload can be reduced, and the production efficiency is improved. The large gram weight fiber fabric on the lower surface of the plate girder can solve the problem of gaps between plates and a die, and can also be used as a flow guide medium for perfusion, and the flow of auxiliary resin is used for filling the gaps between the plates to form the girder.
The V-shaped grooves are positioned on the inner surface of the core material, and are arranged along the chord direction along the length direction (the expansion direction) of the blade, and the depth of each V-shaped groove is about 3-5mm from the bottom. The groove is only located within the range of about 0-150mm of the width of the core material at the edge of the crossbeam, mainly located at 100-150mm, and calculated from the edge of the core material inwards. The rest part of the core material can be slotted normally. The normal core material slotting mode at present is: the inner surface is provided with a cross deep groove, the width of the groove is about 1.5mm, the depth of the groove is 2mm from the bottom, the outer surface is provided with a straight shallow groove, and the groove depth is 2mm along the chord direction of the blade. The invention is as follows: when the extension-direction V-shaped grooves are formed in the areas of 0-150mm of the core materials on the two sides of the crossbeam, the grooves in the extension direction in the normal cross grooves can be eliminated. But the chordwise grooves and the shallow outer surface grooves may be preserved. If the core materials on the two sides of the main beam are larger than 150mm, the 150mm outer core material can be in a cross groove and shallow groove mode. The V-shaped groove utilizes the movability of the V-shaped opening to solve the oblique angle appearing in the thickness direction when the plates are spliced.
Drawings
Fig. 1 is a schematic structural view of a wind turbine blade main beam of the present invention.
Fig. 2 is a schematic view of the chord-wise structure of the core material.
Fig. 3 is a diagram of the filling effect of the fiber fabric.
FIG. 4 is a schematic view of the perfusion structure of the chordwise cross section of the present invention.
In the figure, 1 core material, 2V-shaped grooves, 3 fiber fabrics, 3 vacuum bag molds, 5 guide media, 6 glue injection systems and 7 main beam sheets.
Detailed Description
A manufacturing method of a wind power blade main beam comprises the following steps,
(a) and processing a shrinkable core material 1, wherein the core material consists of width a, height h of the core material, vertical plane oblique angle beta, opening width b of the V-shaped groove 2 and processing depth c.
(b) The width a of the core material is about 100-150mm, the height h of the core material needs to be consistent with the thickness of the crossbeam in each area, the angle beta of the vertical plane oblique angle is consistent with the angle beta of the vertical plane oblique angle of the mold, the width of the opening of the V-shaped groove 2 is about 3-8mm, and the depth of the V-shaped groove is about 3-5mm from the bottom surface c of the core material. The number of the V-shaped grooves can be 2-5.
(c) And (3) paving the high-gram-weight fiber fabric 3 in the cavity of the main beam mold, wherein the large-gram-weight fiber fabric is consistent in size of the main beam and the cavity is filled in the chord direction.
(d) And (b) sequentially placing the core materials 1 in the step (a) in a mould according to the main beam display sequence, wherein the core materials are attached to the vertical surfaces of the front edge and the rear edge of the mould, and the V-shaped opening is naturally opened.
(e) And (5) using a main beam integral hoisting tool.
(f) And (3) hanging the main beam which is spliced by the main beam sheets 7 into a main beam mould, and attaching the vertical surface of the main beam to the core material 1 to enable the V-shaped groove 2 to shrink naturally.
(g) When the width of the contraction opening of the V-shaped groove is larger than 2mm, the same material core material is used for filling until the width of the contraction opening is smaller than 2 mm.
(h) The surfaces of the main beam and the core material are provided with a vacuum bag mold 3, a flow guide medium 5 and a glue injection system 6.
(i) And introducing resin into the main beam sheet by using vacuum pressure to enable the main beam sheet 7 and the core material 1 to form a whole, so as to obtain the wind power blade main beam.
According to the wind power blade main beam obtained by the preparation method, the molded surface of the core material is matched with the mold, so that the enrichment of redundant resin is avoided, and the problem of a gap between a plate and the mold is solved.
Those of ordinary skill in the art will understand that: the discussion of any embodiment above is meant to be exemplary only, and is not intended to intimate that the scope of the disclosure, including the claims, is limited to these examples; within the spirit of the present disclosure, features from the above embodiments or from different embodiments may also be combined, steps may be implemented in any order, and there are many other variations of different aspects of one or more embodiments in this application as described above, which are not provided in detail for the sake of brevity.
It is intended that the one or more embodiments of the present application embrace all such alternatives, modifications and variations as fall within the broad scope of the appended claims. Therefore, any omissions, modifications, substitutions, improvements, and the like that may be made without departing from the spirit and principles of one or more embodiments of the present disclosure are intended to be included within the scope of the present disclosure.
Claims (5)
1. A manufacturing method of a wind power blade main beam is characterized by comprising the following steps,
a) laying fiber fabrics (3) in a cavity of the main beam mold, wherein the size of the fiber fabrics is consistent with that of the main beam, and the cavity is filled in the chord direction;
b) placing the core materials (1) at two sides of a main beam mould and tightly attaching the core materials to front and rear edge vertical surfaces of the main beam mould; a plurality of V-shaped grooves (2) extending along the length direction of the core material are processed on the core material (1), the V-shaped grooves (2) are positioned on the inner surface of the core material (1), and the distance between the V-shaped grooves (2) and the bottom of the core material (1) is 3-5 mm;
c) hanging the main beam sheet into a main beam mould, attaching the vertical surface of the main beam to the core material, and controlling the width of a contraction opening of the V-shaped groove (2) to be less than 2 mm; when the width of the contraction opening is larger than 2mm, filling the contraction opening with the core material of the same material until the width of the contraction opening is smaller than 2 mm;
d) a flow guide medium (5) and a glue injection system (6) are arranged on the surfaces of the main beam and the core material;
e) and guiding the guide medium into the main beam by utilizing vacuum pressure to enable the main beam sheet and the core material to form a whole, so as to obtain the wind power blade main beam.
2. The manufacturing method of the wind power blade main beam as claimed in claim 1, wherein the V-shaped groove (2) is arranged in the range of 0-150mm of the core material.
3. The manufacturing method of the main beam of the wind power blade as defined in claim 1, wherein the width of the opening of the V-shaped groove (2) is 3-8 mm.
4. A method for manufacturing a main beam of a wind turbine blade according to any one of claims 1 to 3, wherein the number of the V-shaped grooves (2) is 2 to 10.
5. A method for manufacturing a main beam of a wind turbine blade according to any one of claims 1 to 3, wherein the filling in step c) is performed using the same material as the core material and is in the form of strips.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011308515.XA CN112537050A (en) | 2020-11-20 | 2020-11-20 | Manufacturing method of wind power blade main beam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011308515.XA CN112537050A (en) | 2020-11-20 | 2020-11-20 | Manufacturing method of wind power blade main beam |
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| CN112537050A true CN112537050A (en) | 2021-03-23 |
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| CN202011308515.XA Pending CN112537050A (en) | 2020-11-20 | 2020-11-20 | Manufacturing method of wind power blade main beam |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113071116A (en) * | 2021-04-22 | 2021-07-06 | 上海电气风电集团股份有限公司 | Production method of prefabricated auxiliary beam with core material for wind turbine blade |
| CN115163395A (en) * | 2022-07-04 | 2022-10-11 | 常州市新创智能科技有限公司 | Wind-powered electricity generation blade girder segment section, girder and wind-powered electricity generation blade |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102350752A (en) * | 2011-09-05 | 2012-02-15 | 株洲时代新材料科技股份有限公司 | Self-guide flow type core material and processing method thereof |
| CN105269838A (en) * | 2015-11-06 | 2016-01-27 | 北京金风科创风电设备有限公司 | Fan blade main beam manufacturing method and fan blade |
-
2020
- 2020-11-20 CN CN202011308515.XA patent/CN112537050A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102350752A (en) * | 2011-09-05 | 2012-02-15 | 株洲时代新材料科技股份有限公司 | Self-guide flow type core material and processing method thereof |
| CN105269838A (en) * | 2015-11-06 | 2016-01-27 | 北京金风科创风电设备有限公司 | Fan blade main beam manufacturing method and fan blade |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113071116A (en) * | 2021-04-22 | 2021-07-06 | 上海电气风电集团股份有限公司 | Production method of prefabricated auxiliary beam with core material for wind turbine blade |
| CN115163395A (en) * | 2022-07-04 | 2022-10-11 | 常州市新创智能科技有限公司 | Wind-powered electricity generation blade girder segment section, girder and wind-powered electricity generation blade |
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Application publication date: 20210323 |
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