CN110789151A - Method for eliminating bubbles at bottom of main beam of blade - Google Patents
Method for eliminating bubbles at bottom of main beam of blade Download PDFInfo
- Publication number
- CN110789151A CN110789151A CN201911076408.6A CN201911076408A CN110789151A CN 110789151 A CN110789151 A CN 110789151A CN 201911076408 A CN201911076408 A CN 201911076408A CN 110789151 A CN110789151 A CN 110789151A
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- China
- Prior art keywords
- blade
- main beam
- laying
- surface shell
- pressure surface
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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
- B29C70/34—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 shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation
- B29C70/342—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 shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation using isostatic pressure
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Composite Materials (AREA)
- Mechanical Engineering (AREA)
- Wind Motors (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
The invention relates to a method for eliminating bubbles at the bottom of a main beam of a blade, which is characterized by comprising the following main steps of: a. blade laying: spreading a VAP film in the main beam placing area in a spreading direction, laying a pressure surface outer skin on the shell, then placing a main beam, laying a core material and the like; b. leaf perfusion: the vacuum pump is simultaneously connected with the glue injection port and the mold-splitting side exhaust port for exhausting, and the whole shell is exhausted into a vacuum system; c. and (5) bonding and curing. Can effectively eliminate the bubbles at the bottom of the main beam of the blade. The resin integrated online perfusion device is adopted, so that bubbles mixed into the resin after mixing can be reduced, the working efficiency is improved, and the probability of occurrence of perfusion whitening and bubble defects is reduced. The operation is convenient, the finished product quality of the blade is ensured, the production efficiency is improved, and the production cost is reduced.
Description
Technical Field
The invention belongs to the field of wind power blade manufacturing, and particularly relates to a method for eliminating bubbles at the bottom of a main beam of a wind power blade.
Background
The wind power blade is used as a key component of a wind power generator, the operation stability of the wind power blade directly influences the normal operation of the wind power generator, and the quality control of the blade is particularly critical. At present, most of blade structures consist of a suction surface shell, a pressure surface shell and a web plate, wherein a main beam and the web plate are prefabricated and formed firstly, the prefabricated main beam and the shell are poured and formed together, and the suction surface shell, the web plate and the pressure surface shell are bonded through structural glue to form the blade. Dense bubbles are easily formed between the prefabricated main beam and the shell outer skin in the blade forming process, and the quality of the blade is seriously influenced.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a method for eliminating bubbles at the bottom of a main beam of a blade.
In order to achieve the purpose, the invention adopts the technical scheme that: a method for eliminating bubbles at the bottom of a main beam of a blade is characterized by comprising the following steps:
a. blade laying: firstly, a VAP film is spread in a main beam placing area in a spanwise direction, and a VAP film air bridge is used for connecting the spanwise VAP film and a mold-dividing edge air extraction opening of a blade mold; laying a pressure surface outer skin on a pressure surface shell mould, laying a suction surface outer skin on a suction surface shell mould, laying reinforcing layer glass fibers on a front blade root, then putting a pressure surface main beam and a suction surface main beam, laying a core material, a rear blade root reinforcing layer glass fiber and an inner skin glass fiber, and finally laying a perfusion auxiliary material;
b. leaf perfusion: after the laying is finished, the vacuum pump is simultaneously connected with the glue injection port and the mold separation side air extraction port to extract air, after 25-30 minutes, the mold separation side air extraction port is only used for extracting air, the whole shell is vacuumized to form a vacuum system, and an air bridge of the vacuum system is two layers: the dense mesh net and the air permeable felt increase the air bridge air extraction effect; injecting epoxy resin into the mold cavity through the glue injection port, continuously vacuumizing to keep the vacuum degree in the mold cavity after the resin is completely soaked in the glass fiber layer until the resin system is completely cured to obtain a pressure surface shell and a suction surface shell;
c. bonding and curing: removing the pouring auxiliary materials, bonding the front edge part of the pressure surface shell with the front edge part of the suction surface shell and bonding the rear edge part of the pressure surface shell with the rear edge part of the suction surface shell by using structural adhesive, bonding a web plate between the pressure surface shell and the suction surface shell, and heating to completely cure the structural adhesive, wherein no air bubble exists between the obtained main beam and the outer skin of the wind power blade.
The perfusion system is a resin integrated online perfusion device, so that the resin and the curing agent monomer are subjected to continuous degassing and material preparation without secondary mixing and defoaming; the quantity and the filling speed are measured by adopting electronic control, the reaction materials are directly filled in a whole-course closed system through pressure control, the temperature is constant in the material filling process, the materials are quickly filled, and the vacuum bag film is prevented from bulging.
The invention has the beneficial effects that: and a VAP film is paved in the spanwise direction of the bubble frequent region at the bottom of the main beam for air guiding, and a VAP film air bridge is used for connecting the spanwise VAP film and the blade mould split-mould side air exhaust pipeline, so that bubbles at the bottom of the blade main beam are effectively eliminated. The resin integrated online perfusion device is adopted, so that bubbles mixed into the resin after mixing can be reduced, the working efficiency is improved, and the probability of occurrence of perfusion whitening and bubble defects is reduced. The operation is convenient, the finished product quality of the blade is ensured, the production efficiency is improved, and the production cost is reduced.
Drawings
FIG. 1 is a schematic view of the VAP film laying of the present invention;
FIG. 2 is a schematic diagram of the arrangement of glue injection ports of the blade of the present invention;
FIG. 3 is a schematic view of the blade mold vacuum port arrangement of the present invention;
FIG. 4 is a schematic view of a blade configuration according to the present invention;
in the figure: 1-blade mould, 2-glue injection port, 3-mould-dividing edge air extraction port, 4-main beam placement area, 5-VAP film, 6-air bridge, 7-web, 8-pressure surface shell, 9-pressure surface main beam, 10-pressure surface outer skin, 11-suction surface shell, 12-suction surface main beam and 13-suction surface outer skin.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
a. blade laying: firstly, a VAP film 5 is paved in a main beam placing area 4 in a spanwise direction, and a VAP film air bridge 6 is used for connecting the spanwise VAP film and a mold-dividing edge air extraction opening 3 of a blade mold 1; laying a pressure surface outer skin 10 on a pressure surface shell mould, laying a suction surface outer skin 13 on a suction surface shell mould, laying reinforcing layer glass fibers on a front blade root, then putting a pressure surface main beam 9 and a suction surface main beam 12, laying a core material, rear blade root reinforcing layer glass fibers and inner skin glass fibers, and finally laying a perfusion auxiliary material;
b. leaf perfusion: after the laying is finished, the vacuum pump is simultaneously connected with the glue injection port 2 and the mold separation side air exhaust port 3 for air exhaust, after 25-30 minutes, only the mold separation side air exhaust port 3 is used for air exhaust, the whole shell is vacuumized to form a vacuum system, and an air bridge of the vacuum system is two-layer: the dense mesh net and the air permeable felt increase the air bridge air extraction effect; injecting epoxy resin into the mold cavity through the glue injection port 2, continuously vacuumizing to keep the vacuum degree in the mold cavity after the resin is completely soaked in the glass fiber layer until the resin system is completely cured to obtain a pressure surface shell 8 and a suction surface shell 11;
c. bonding and curing: removing the pouring auxiliary materials, bonding the front edge part of the pressure surface shell 8 with the front edge part of the suction surface shell 11 and bonding the rear edge part of the pressure surface shell 8 with the rear edge part of the suction surface shell 11 by using structural adhesive, bonding the web 7 between the pressure surface shell 8 and the suction surface shell 11, and heating to completely cure the structural adhesive, wherein no bubble exists between the obtained main beam and the outer skin of the wind power blade.
The perfusion system is a resin integrated online perfusion device, so that the resin and the curing agent monomer are subjected to continuous degassing and material preparation without secondary mixing and defoaming; the quantity and the filling speed are measured by adopting electronic control, the reaction materials are directly filled in a whole-course closed system through pressure control, the temperature is constant in the material filling process, the materials are quickly filled, and the vacuum bag film is prevented from bulging.
The above embodiments are merely illustrative of the principles of the present invention and its effects, and do not limit the present invention. It will be apparent to those skilled in the art that modifications and improvements can be made to the above-described embodiments without departing from the spirit and scope of the invention. Accordingly, it is intended that all equivalent modifications or changes be made by those skilled in the art without departing from the spirit and technical spirit of the present invention, and be covered by the claims of the present invention.
Claims (2)
1. A method for eliminating bubbles at the bottom of a main beam of a blade is characterized by comprising the following steps:
a. blade laying: firstly, a VAP film (5) is paved in a main beam placing area (4) in a spanwise direction, and the VAP film in the spanwise direction is connected with a mold-dividing edge air extraction opening (3) of a blade mold (1) by using a VAP film air bridge (6); laying a pressure surface outer skin (10) on a pressure surface shell mould, laying a suction surface outer skin (13) on a suction surface shell mould, laying reinforcing layer glass fibers on a front blade root, then putting a pressure surface main beam (9) and a suction surface main beam (12), laying core materials, rear blade root reinforcing layer glass fibers and inner skin glass fibers, and finally laying a perfusion auxiliary material;
b. leaf perfusion: after paving, the vacuum pump is connected with the glue injection port (2) and the mold separation side air extraction port (3) at the same time for air extraction, after 25-30 minutes, only the mold separation side air extraction port (3) is used for air extraction, the whole shell is vacuumized to form a vacuum system, and an air bridge of the vacuum system is two-layer: the dense mesh net and the air permeable felt increase the air bridge air extraction effect; injecting epoxy resin into the mold cavity through the glue injection port (2), continuously vacuumizing to keep the vacuum degree in the mold cavity after the resin is completely soaked in the glass fiber layer until the resin system is completely cured to obtain a pressure surface shell (8) and a suction surface shell (11);
c. bonding and curing: removing the pouring auxiliary materials, bonding the front edge part of the pressure surface shell (8) with the front edge part of the suction surface shell (11) by using structural adhesive, bonding the rear edge part of the pressure surface shell (8) with the rear edge part of the suction surface shell (11), bonding the web plate (7) between the pressure surface shell (8) and the suction surface shell (11), and heating to completely cure the structural adhesive, wherein no bubble exists between the obtained main beam of the wind power blade and the outer skin.
2. The method for eliminating the bubbles at the bottom of the main beam of the blade as claimed in claim 1, wherein the perfusion system is a resin integrated online perfusion device, so that the resin and the curing agent monomer are subjected to continuous degassing and material preparation without secondary mixing and defoaming; the quantity and the filling speed are measured by adopting electronic control, the reaction materials are directly filled in a whole-course closed system through pressure control, the temperature is constant in the material filling process, the materials are quickly filled, and the vacuum bag film is prevented from bulging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911076408.6A CN110789151A (en) | 2019-11-06 | 2019-11-06 | Method for eliminating bubbles at bottom of main beam of blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911076408.6A CN110789151A (en) | 2019-11-06 | 2019-11-06 | Method for eliminating bubbles at bottom of main beam of blade |
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| Publication Number | Publication Date |
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| CN110789151A true CN110789151A (en) | 2020-02-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911076408.6A Pending CN110789151A (en) | 2019-11-06 | 2019-11-06 | Method for eliminating bubbles at bottom of main beam of blade |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114248469A (en) * | 2021-12-22 | 2022-03-29 | 东方电气（天津）风电叶片工程有限公司 | Method for optimizing bonding angle die of front edge and rear edge of wind power blade made of composite material |
| CN117818095A (en) * | 2024-03-06 | 2024-04-05 | 国能联合动力技术(连云港)有限公司 | Turnover preformed pultrusion girder die |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109281806A (en) * | 2018-09-25 | 2019-01-29 | 株洲时代新材料科技股份有限公司 | A kind of wind electricity blade structure and preparation method thereof |
-
2019
- 2019-11-06 CN CN201911076408.6A patent/CN110789151A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109281806A (en) * | 2018-09-25 | 2019-01-29 | 株洲时代新材料科技股份有限公司 | A kind of wind electricity blade structure and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 李奎: "风电叶片真空灌注成型工艺质量问题研究", 《现代工业经济和信息化》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114248469A (en) * | 2021-12-22 | 2022-03-29 | 东方电气（天津）风电叶片工程有限公司 | Method for optimizing bonding angle die of front edge and rear edge of wind power blade made of composite material |
| CN117818095A (en) * | 2024-03-06 | 2024-04-05 | 国能联合动力技术(连云港)有限公司 | Turnover preformed pultrusion girder die |
| CN117818095B (en) * | 2024-03-06 | 2024-05-28 | 国能联合动力技术(连云港)有限公司 | Turnover preformed pultrusion girder die |
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