CN109466090B - Preparation method of segmented vacuum infusion of megawatt wind driven generator blade - Google Patents
Preparation method of segmented vacuum infusion of megawatt wind driven generator blade Download PDFInfo
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- CN109466090B CN109466090B CN201811301219.XA CN201811301219A CN109466090B CN 109466090 B CN109466090 B CN 109466090B CN 201811301219 A CN201811301219 A CN 201811301219A CN 109466090 B CN109466090 B CN 109466090B
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- 238000009755 vacuum infusion Methods 0.000 title claims abstract description 38
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 239000011347 resin Substances 0.000 claims abstract description 53
- 229920005989 resin Polymers 0.000 claims abstract description 53
- 238000007789 sealing Methods 0.000 claims abstract description 15
- 238000002347 injection Methods 0.000 claims abstract description 12
- 239000007924 injection Substances 0.000 claims abstract description 12
- 239000003292 glue Substances 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims description 14
- 239000003365 glass fiber Substances 0.000 claims description 8
- 239000011162 core material Substances 0.000 claims description 4
- 238000001802 infusion Methods 0.000 abstract description 22
- 238000000034 method Methods 0.000 abstract description 13
- 230000010412 perfusion Effects 0.000 abstract description 6
- 238000005192 partition Methods 0.000 abstract 1
- 230000011218 segmentation Effects 0.000 abstract 1
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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Classifications
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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
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Composite Materials (AREA)
- Mechanical Engineering (AREA)
- Wind Motors (AREA)
Abstract
The invention discloses a preparation method of sectional type vacuum infusion of megawatt wind driven generator blades, which comprises the following steps of modularly dividing blade structures according to theoretical design values (1) of the blades, namely dividing infinite structures into limited modules (2), and then designing a vacuum infusion system (7) in a sectional type according to each module (2): arranging a flow guide net (3), arranging a resin runner (4), arranging a glue injection port (5), and simultaneously plugging part of the resin runner (4) by adopting a sealing rubber strip (6), thereby finally realizing a sectional type vacuum infusion system (7). The method has reasonable process design and strong operability, modularly controls the perfusion risk, and finally reduces the perfusion risk to the minimum. The invention realizes a brand-new vacuum infusion system for modularized infusion by a resin runner segmentation and partition method so as to achieve the purposes of controlling the resin flow rate and controlling the resin content and perfectly convert the theoretical design requirements into actual products.
Description
Technical Field
The invention relates to a preparation method for megawatt wind generator blade vacuum infusion, in particular to a preparation method for megawatt wind generator blade sectional type vacuum infusion.
Background
With the increasing bulkiness of megawatt wind generator blades, the conventional integral vacuum infusion process cannot meet the design requirements. In conventional integral infusion, an infusion system is designed according to the integral structure of the blade, and resin is infused in vacuum according to the integral theoretical design value of the blade in the infusion process. The amount of the poured resin is freely distributed only by the resin flow channels, the risk of pouring is uncontrollable, and the poured product is inconsistent with the theoretical design value, so that the moment of the product is extremely poor, and the inestimable risk is brought to the whole operation of the fan.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to meet the design requirements of the daily change, solve the defects of the prior art and provide a method which has reasonable process design and strong operability and adopts sectional vacuum infusion to each module. The invention is beneficial to realizing the consistency of the product and the design value, and can control the perfusion flow rate of the whole blade, reduce the perfusion risk and ensure the moment performance of the product.
The technical scheme is as follows: in order to realize the purpose of the invention, the invention adopts the technical scheme that:
a preparation method of sectional type vacuum infusion of megawatt wind driven generator blades comprises the following steps:
a. converting the theoretical design value of the whole blade into a modularized theoretical design value;
b. according to each module, sectional vacuum infusion is adopted, a vacuum infusion system is designed, and a flow guide net, a resin runner and an adhesive injection port are arranged;
c. according to the design of each module, sealing rubber strips are adopted to block part of the resin flow passages, so that the flow speed and the flow direction of the resin flow passages are controlled;
d. establishing a vacuum perfusion system of each module;
e. vacuumizing, and sequentially vacuum-infusing resin into each divided module according to a theoretical design value;
f. according to the steps, sequentially carrying out sectional type vacuum resin infusion on each module, and finally completing the infusion of the whole blade;
g. and after the whole blade is poured, curing and forming, and then removing pouring auxiliary materials such as the flow guide net, the resin flow channel, the glue injection port, the sealing rubber strip and the like to obtain the designed product.
Preferably, in the method for preparing the segmented vacuum infusion of the megawatt wind turbine blade, theoretical design values of the modules are converted according to the following process: firstly, calculating the area of the glass fiber according to the structure of the blade, further obtaining the weight of the glass fiber, and finally calculating the theoretical gel content A of the glass fiber according to the resin content of the glass fiber; secondly, calculating the area of the core material according to the structure of the blade, and then obtaining the theoretical gel content B of the core material; meanwhile, according to the auxiliary material structure of each module, calculating the gel content C of the auxiliary material; the final theoretical design value for each module is the sum of A, B, C. And in the actual process, calculating according to the numerical values of the fan blades with different lengths.
As a preferred scheme, in the preparation method of the segmented vacuum infusion of the megawatt wind driven generator blade, the theoretical design value of the vacuum infusion system and the vacuum infusion is divided according to the theoretical resin infusion amount of the whole blade, and meanwhile, the theoretical infusion amount of auxiliary materials is increased;
as a preferred scheme, in the preparation method of the segmented vacuum infusion for the megawatt wind turbine blade, each module is designed into an infusion system separately according to different specific structures, and a flow guide net, a resin flow channel, an injection glue inlet and the like are arranged. The resin flow channel can be plugged by adopting a sealing rubber strip so as to control the flow direction and the flow rate of the resin.
According to the preferable scheme, the whole pouring blade is extended to the pouring of the whole blade according to the pouring scheme of the modules, so that the aims of a blade with an infinite structure and a limited number of modules are fulfilled. Finally, heating and curing the product, and removing the auxiliary materials to obtain the designed product.
According to the preparation method for the segmented vacuum infusion of the megawatt wind driven generator blade, an integral blade structure is converted into limited modules, resin is infused according to each module and a design value, and meanwhile, in order to control infusion risk and infusion flow rate, partial resin flow channels need to be blocked by sealing rubber strips.
According to the preparation method for the segmented vacuum infusion of the megawatt wind driven generator blade, firstly, the flow guide net can be not disconnected, the sealing rubber strip is required to be used for plugging the resin flow channel, the resin flow channel can be disconnected by 50-70mm, and the disconnected area is plugged by the sealing rubber strip.
According to the preparation method for the segmented vacuum infusion of the megawatt wind driven generator blade, the vacuum infusion system is an infusion system of each module, is integrally sealed in the same vacuum infusion system, achieves the purpose of modular integral infusion, finally achieves the consistency of products and design, and controls the flow speed and the flow direction of resin so as to achieve the theoretical vacuum infusion product.
Has the advantages that: compared with the prior art, the preparation method of the sectional type vacuum perfusion of the megawatt wind driven generator blade has the following advantages:
the preparation method provided by the invention has reasonable process design and strong operability, and realizes sectional type infusion of each module by controlling the flow direction and the flow rate of the resin runner and adopting a sectional type vacuum infusion process, so that the whole fan blade is finally prepared. The method is beneficial to the conformity of the product with a theoretical design value, the management and control of risks in the production process, the control of the resin flow rate, the flow direction and the resin consumption in the filling process, and the prepared wind driven generator blade product has high weight and torque precision and strong practicability.
Drawings
Fig. 1 is a schematic structural diagram of a sectional vacuum infusion preparation process of a megawatt wind turbine blade according to the present invention.
Detailed Description
The present invention is further illustrated by the following figures and specific examples, which are to be understood as illustrative only and not as limiting the scope of the invention, which is to be given the full breadth of the appended claims and any and all equivalent modifications thereof which may occur to those skilled in the art upon reading the present specification.
Example 1
As shown in fig. 1, the whole blade can be split into two parts, a windward side and a leeward side, and a specific vacuum infusion preparation scheme is illustrated below by taking the windward side of a 69-meter fan blade as an example, and comprises the following steps:
a. according to the theoretical design value of the windward side, the windward side is divided into 6 modules I, and meanwhile, the resin amount of each module I is obtained through calculation in sequence; increasing the auxiliary material resin dosage according to the auxiliary material dosage of each module I to finally obtain the theoretical design value 1 of each module;
b. b, performing segmented vacuum infusion on the 6 modules I split in the step a, designing a vacuum infusion system 7, arranging a flow guide net 3, arranging a resin runner 4 and arranging a glue injection port 5;
c. calculating the theoretical resin consumption of 6 modules I according to the designed structure of the modules I, and plugging the resin flow channel 4 in the disconnected area and the module edge area by adopting a sealing rubber strip 6 to control the flow speed and the flow direction of the resin flow channel 4;
d. sealing the 6 modules I on the windward side by adopting a vacuum film to obtain a vacuum infusion system 7;
e. vacuumizing, and performing vacuum resin infusion on the module I according to a theoretical design value;
f. sequentially carrying out sectional type vacuum resin infusion on each module according to the steps, closing the glue injection port in time after the infusion of each module is finished, stopping injecting the resin into the product, and finally completing the infusion of the whole blade;
g. and after the whole blade is poured, curing and forming, and then removing pouring auxiliary materials such as the flow guide net 3, the resin flow channel 4, the glue injection port 5, the sealing rubber strip 6 and the like to obtain the windward side of the wind power blade.
According to the same scheme, a specific vacuum infusion preparation scheme is explained by taking a leeward side of a 69-meter fan blade as an example, and comprises the following steps:
a. according to the theoretical design value of the leeward side, the leeward side is divided into 6 modules II, and the resin amount of each module II is obtained through calculation in sequence; increasing the dosage of the auxiliary material resin according to the dosage of the auxiliary material of each module II to finally obtain the theoretical design value 2 of each module II;
b. b, performing segmented vacuum infusion on the 6 modules II split in the step a, designing a vacuum infusion system 7, arranging a flow guide net 3, arranging a resin runner 4 and arranging a glue injection port 5;
c. according to the design of the module II, the resin flow channel 4 in the disconnected area and the module edge area is blocked by a sealing rubber strip 6, so that the flow speed and the flow direction of the resin flow channel 4 are controlled;
d. sealing all the modules II on the windward side by adopting a vacuum film to obtain a vacuum infusion system 7;
e. vacuumizing, and performing vacuum resin infusion on the module II according to a theoretical design value;
f. sequentially carrying out sectional type vacuum resin infusion on each module according to the steps, closing the glue injection port in time after the infusion of each module is finished, stopping injecting the resin into the product, and finally completing the infusion of the whole blade;
g. and after the whole blade is poured, curing and forming, and then removing pouring auxiliary materials such as the flow guide net 3, the resin flow channel 4, the glue injection port 5, the sealing rubber strip 6 and the like to obtain the leeward side of the wind power blade.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (1)
1. A preparation method of sectional type vacuum infusion of megawatt wind driven generator blades is characterized by comprising the following steps:
a. firstly, calculating the area of the glass fiber according to the structure of the blade, further obtaining the weight of the glass fiber, and finally calculating the theoretical gel content A of the glass fiber according to the resin content of the glass fiber; secondly, calculating the area of the core material according to the structure of the blade, and then obtaining the theoretical gel content B of the core material; meanwhile, according to the auxiliary material structure of each module, calculating the gel content C of the auxiliary material; finally, the theoretical design value (1) of each module is A, B, C;
b. according to each module (2), sectional vacuum infusion is adopted, a vacuum infusion system (7) is designed, and a flow guide net (3), a resin runner (4) and a glue injection port (5) are arranged;
c. according to the design of each module (2), a part of the resin flow channel (4) is blocked by a sealing rubber strip (6) so as to control the flow speed and the flow direction of the resin flow channel (4);
d. establishing a vacuum infusion system (7) of each module (2);
e. vacuumizing, and sequentially vacuum-infusing resin into each divided module (2) according to a theoretical design value;
f. according to the steps, the resin is poured into each module (2) in a sectional type vacuum mode in sequence, and finally the pouring of the whole blade is completed;
g. and after the whole blade is poured, curing and forming, and then removing the flow guide net (3), the resin flow channel (4), the glue injection port (5) and the sealing rubber strip (6) to pour auxiliary materials to obtain the designed product.
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| CN201811301219.XA CN109466090B (en) | 2018-11-02 | 2018-11-02 | Preparation method of segmented vacuum infusion of megawatt wind driven generator blade |
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| CN201811301219.XA CN109466090B (en) | 2018-11-02 | 2018-11-02 | Preparation method of segmented vacuum infusion of megawatt wind driven generator blade |
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| CN109466090B true CN109466090B (en) | 2021-02-09 |
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| CN111186148A (en) * | 2020-01-13 | 2020-05-22 | 苏州瑞意达机械设备有限公司 | Full-automatic management and control filling system |
| CN113386373B (en) * | 2021-05-28 | 2023-03-21 | 上纬(天津)风电材料有限公司 | Integrated resin infusion method and system applied to wind power blade manufacturing |
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Effective date of registration: 20231122 Address after: 9th Floor, Block C, Building B6, Dongsheng Science and Technology Park, No. 66 Xixiaokou Road, Haidian District, Beijing, 100192 Patentee after: SINOMATECH WIND POWER BLADE Co.,Ltd. Address before: 222000 6 Jinqiao Road, Dapu Industrial Park, Lianyungang City, Jiangsu Province Patentee before: LIANYUNGANG ZHONGFU LIANZHONG COMPOSITES GROUP Co.,Ltd. |