CN101767469A - Integral moulding technology for large scale wind blade - Google Patents
Integral moulding technology for large scale wind blade Download PDFInfo
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- CN101767469A CN101767469A CN 201010100404 CN201010100404A CN101767469A CN 101767469 A CN101767469 A CN 101767469A CN 201010100404 CN201010100404 CN 201010100404 CN 201010100404 A CN201010100404 A CN 201010100404A CN 101767469 A CN101767469 A CN 101767469A
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Abstract
The invention mainly discloses an integral moulding technology for large scale wind blade, in particular comprises the following steps: first forge the upper blade shell and then the lower blade shell, combine the two shells into one before the lower blade shell solidifies. The reserved pre-impregnation strengthening material on the lower blade shell is arranged onto the rim of the upper blade shell. The joint points of the upper and the lower blade shells are connected by strengthening materials, and the upper and lower blade shells are cured into a whole part by vacuum pressure method. The invention features the following advantages: With the co-curing technology, the composite material blade shells are shaped integrally, and the upper and lower shells are connected by glass fibre, thus enhancing the integral performance of the blades. The blade shells are forged to be closed structures, proving a better carrying capacity; as a result, the weight borne by the main beam is reduced, and at the same time the possible invalidity of the blades caused by bonding quality is therefore radically eliminated.
Description
Technical field
The present invention relates to a kind of integral moulding technology for large scale wind blade, specifically is the technology that a kind of employing vacuumizes, with the technology of blade integral moulding.
Background technology
The blade of wind-driven generator technology is one of wind generator system key technology, present middle-size and small-size blade, begun to adopt RTM technology global formation abroad, but the megawatt level composite material fan blade is all by the moulding of split multistep, be after lower casing and girder plate are made respectively on the blade, stick into one again, because the intensity of last lower casing abutting edge is low, one of important quality problem into blade has ftractureed in the abutting edge, according to statistics, the blade about 20% that lost efficacy causes owing to bonding quality, thereby has influenced giving full play to of composite material blade performance greatly, the service life of reduction blade.
Summary of the invention
Main task of the present invention is to provide a kind of large scale wind blade co-curing integral forming technique, specifically be that a kind of upper and lower lobes shell junction glass fibre that can make is continuous, the leaf shell becomes closing structure, and the overall performance raising of blade and bearing capacity be the large scale wind blade co-curing integral forming technique of corresponding raising also.
In order to solve above technical problem, a kind of integral moulding technology for large scale wind blade of the present invention, described large scale wind blade is that infuse has the glass fiber compound material integral solidifying of resin to constitute, it is characterized in that: described moulding process is for adopting leaf shell on the vacuum diversion technological forming earlier, on laying during leaf shell reinforcing material with the edge, be that the reinforcing material ecto-entad of upper and lower lobes shell junction successively increases width and is laid to blade-like, again after moulding on fixedly connected two blocks of prefabricated main webs in the leaf shell cavity; The moulding material of lay pre-impregnated resin in inferior lobe shell mould then, when laying the pre-preg reinforcing material, ecto-entad successively successively decreases and remains for the reinforcing material that matches with last leaf shell edge knife bladed in advance on the mould flange flange of inferior lobe shell, at last with upper and lower lobes shell matched moulds, reinforcing material on the inferior lobe shell mould flange flange is laid supreme leaf shell faying face place again, upper and lower lobes shell reinforcing material becomes as a whole, behind the vacuum bag pressure method curing molding, remove the large scale wind blade that auxiliary material are put in order wholely.
Further, the reinforcing material of described lower blade is the reinforcing material of pre-infuse resin, and the content of resin is controlled at less than 35%.
The invention has the advantages that: the present invention adopts the co-curing technology, global formation composite material blade shell, last lower casing joint glass fibre is continuous, improved the overall performance of blade greatly, the leaf shell becomes closing structure, possessed higher bearing capacity, thereby can alleviate weight, thoroughly got rid of the possibility that causes the blade inefficacy because of bonding quality simultaneously as the girder of main load-bearing part.
Description of drawings
The schematic diagram of Fig. 1 during for large scale wind blade moulding of the present invention.
Fig. 2 is the stereogram of large scale wind blade of the present invention.
The specific embodiment
Large scale wind blade of the present invention as shown in Figure 1, 2, constitute by blade 1, blade root 2, main web 3, girder cap 4, its structure is: the root global formation blade root 2 of blade 1, girder cap 4 is two, be integrally formed in respectively in two leaf shells up and down of blade 1, main web 3 is two, vertically is placed in the cavity of blade 1, and fixedlys connected with the girder cap 4 in the blade upper and lower lobes shell respectively.
When making above-mentioned large scale wind blade, blade root 2 and girder cap 4 make for conventional vacuum diversion technology, and main web 3 makes by conventional vacuum bag pressure method for the glass fiber material of pre-impregnated resin.Main innovative point is: the manufacture craft of blade 1 is for making leaf shell 1a earlier, make inferior lobe shell 1b again, and before inferior lobe shell 1b solidifies and solidified on leaf shell 1a matched moulds, the pre-preg reinforcing material that inferior lobe shell 1b reserves re-lays supreme leaf shell 1a edge, upper and lower lobes shell apposition position reinforcing material is continuous, solidifies as a whole by vacuum bag pressure method.
The processing step of its integral blade moulding is as follows:
A, elder generation make main web 3
Adopt vacuum bag pressure method to make composite master web, preparation method is as follows: at first main web mould is carried out conventional cleaning and tidying, release cloth then tiles in the die cavity of mould, spread the multi-axial fabric--multi-axial fabric of--sandwich material---two-layer pre-impregnated resin that does not have two-layer pre-impregnated resin more successively, release cloth then again tiles on the above-mentioned material of main part of completing, last resin outlet, the vacuum bag of establishing resin water conservancy diversion net routinely and lay band vacuum aided film on release cloth, vacuum bag will be carried out sealing at die edge.After finishing, begin to vacuumize, unnecessary resin is extracted out from the resin outlet, solidify the back and remove the vacuum forming auxiliary material, edge trimming is formed main web by atmospheric pressure.Totally two of main webs of the present invention.
B, prefabricated girder cap 4
Adopt the vacuum diversion legal system to make blade two girders up and down.At first girder hat cone tool is carried out conventional cleaning and tidying, lay water conservancy diversion net-isolation mode-release cloth-multiaxis is to the resin outlet-vacuum bag of reinforcing material-release cloth-lay band vacuum aided film successively in die cavity then, and vacuum bag is carried out sealing at die edge.Vacuumize at last, by negative pressure of vacuum resin is sucked after being less than 30MPA vacuum, after all soaking into reinforcing material, waiting resin solidification, stop to vacuumize, remove the vacuum forming auxiliary material at last,, obtain prefabricated girder cap edge trimming.Above technology is vacuum diversion technology commonly used, and detail is not repeated at this.
C, prefabricated blade root 2
Because blade root thickness is bigger, can adopt the technology similar to prefabricated girder cap prefabricated blade root on the blade root mould.Prefabricated blade root length 1-1.5M, thickness 4-5CM.
Leaf shell 1a in D, the making
As shown in the figure, after shell mould cleaning on the blade and applying release materials, step is made gel coating resin routinely, after the gel coat primary solidification, lay is along die cavity tiling outer layer fiber reinforcing material, above-mentioned fibre reinforced materials is the staged ecto-entad and successively increases reinforcing material on whole edges, until concordant with die edge; Then middle part lay prefabricated girder cap wherein on outer fibre reinforced materials, PVC foam or cork wood sandwich material are laid in position beyond the girder cap, place prefabricated blade root in the root correspondence of blade then, last lay inner fiber reinforcing material is finished whole laying of going up leaf shell material of main part.Lay water conservancy diversion net and resin mozzle successively on material of main part then, the resin mozzle can be for establishing countless limbs on the trunk, also can be directly to open a lot of apertures on the trunk, form can be various, as long as can reach the resin energy thorough impregnation fibre reinforced materials of the mouth of pipe ejection of resin mozzle; After above-mentioned resin mozzle is completed, lay the pedestal that vacuumizes of band vacuum aided film at the edge, and, carry out sealing at vacuum bag and die edge place at surperficial lay vacuum bag, at last, vacuum-pumping pipeline with vacuumize pedestal and link to each other.Vacuumize after all finishing, vacuum less than 30MBAR after, by negative pressure of vacuum resin is sucked, after soak into reinforcing material fully, waiting the resin primary solidification, stop to vacuumize.After fully solidifying according to the resin technological requirement again, remove the vacuum forming auxiliary material, finish the moulding of leaf shell.
E, fixing main web 3 and demoulding finishing
In last leaf shell, vertically lay the position of two blocks of prefabricated main webs to design code, main web will be gone up the leaf shell and be divided into three cavitys, main web root is stuck with paste the fiberglass transition with last leaf shell bottom by hand and is connected, after hand is stuck with paste fiberglass curing, will go up the demoulding of leaf shell and to edge trimming.In three cavitys, place vacuum bag respectively at last.
The moulding material of F, lay inferior lobe shell 1b
The same leaf shell is similar, after the cleaning of blade lower casing mould and applying release materials, step is made gel coating resin routinely, after the gel coat primary solidification, the outer layer fiber reinforcing material of the resin of the pre-soaked 35% following content of lay, the outer layer fiber reinforcing material tiles along die cavity, and ecto-entad successively successively decreases and remains for the reinforcing material of top edge in advance on its mould flange flange, until concordant with die edge; Then another prefabricated piece girder cap is placed in the corresponding position of leaf shell girder cap, last lay inner fiber reinforcing material is finished the laying of whole inferior lobe shell material of main part.After laying finishes, laying the fiberglass angle bar that is connected inferior lobe shell and main web, in order to make the error adjustable gaps between main web and the lower house, at an amount of adhesive of the inner filling of parallel angle bar with last leaf shell master web corresponding position.Vacuum bag compression technology necessary suction glue felt or water conservancy diversion net at last tile on the internal layer reinforcing fiber materials.
G, sealing matched moulds
With the last leaf shell upset of forming and to being bonded on the inferior lobe casing forming mould, with the accurate contraposition of bed die, the inferior lobe shell is reserved reinforcing material paste last leaf shell edge, and with the whole leaf shell of the chimeric formation in last leaf shell edge, arrange the vacuum suction pedestal at the blue flange of inferior lobe shell moulding place then, covering vacuum bags on the leaf shell on all again, and establish a circle sealing ring at inferior lobe shell mould edge so that follow-uply carry out vacuum seal, at last three vacuum bags of root of blade and blade inside cavity are carried out sealing, and vacuum line and the die edge pedestal of bleeding is linked to each other.
H, vacuum bag are molded
The vacuum line house steward of the vacuum line of the 7th step finally links to each other with the resin collecting tank, and the resin collecting tank is connected with vavuum pump.Open vavuum pump, by vacuumizing unnecessary resin is extracted out, resin gel stops to vacuumize after solidifying in pipeline.Then, the resin in the large fan blade fully solidifies the rear fan blade forming according to the resin technological requirement and finishes, and removes the vacuum forming auxiliary material at last.
I, arrangement
Remove edge and inner vacuum moulding auxiliary material and comprise vacuum line, vacuum bag, auxiliary material such as water conservancy diversion net, to the edge of fan blade carrying out grinding process, after blade surface carried out normal application and handle, fan blade promptly prepares to be finished.
Claims (2)
1. integral moulding technology for large scale wind blade, described large scale wind blade constitutes for the fibrous composite integral solidifying, it is characterized in that: described moulding process is for adopting leaf shell on the vacuum diversion technological forming earlier, on laying during leaf shell reinforcing material with the edge, be that the reinforcing material ecto-entad of upper and lower lobes shell junction successively increases width and is laid to blade-like, again after moulding on fixedly connected two blocks of prefabricated main webs in the leaf shell cavity; The moulding material of lay pre-impregnated resin in inferior lobe shell mould then, when laying the pre-preg reinforcing material, ecto-entad successively successively decreases and remains for the reinforcing material that matches with last leaf shell edge knife bladed in advance on the mould flange flange of inferior lobe shell, at last with upper and lower lobes shell matched moulds, reinforcing material on the inferior lobe shell mould flange flange is laid supreme leaf shell faying face place again, upper and lower lobes shell reinforcing material becomes as a whole, behind the vacuum bag pressure method curing molding, remove the large scale wind blade that auxiliary material are put in order wholely.
2. a kind of integral moulding technology for large scale wind blade according to claim 1 is characterized in that: the reinforcing material of described lower blade is the reinforcing material of pre-infuse resin, and the content of resin is controlled at less than 35%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010100404 CN101767469A (en) | 2010-01-25 | 2010-01-25 | Integral moulding technology for large scale wind blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010100404 CN101767469A (en) | 2010-01-25 | 2010-01-25 | Integral moulding technology for large scale wind blade |
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| CN101767469A true CN101767469A (en) | 2010-07-07 |
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| CN 201010100404 Pending CN101767469A (en) | 2010-01-25 | 2010-01-25 | Integral moulding technology for large scale wind blade |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102416700A (en) * | 2011-08-31 | 2012-04-18 | 乔治富 | Production technology of vane used for vertical shaft wind driven generator |
| CN104276714A (en) * | 2013-07-04 | 2015-01-14 | 山西中日威尔森环保技术开发有限公司 | Vacuum diversion one-shot forming purification tank |
| CN107856327A (en) * | 2017-10-10 | 2018-03-30 | 上海致远绿色能源股份有限公司 | Spar cap and blade shell one pouring and forming process |
| CN108688202A (en) * | 2017-04-11 | 2018-10-23 | 玉门市艾郎风电科技发展有限公司 | A kind of outer bound edge bag pressure device of wind electricity blade |
| CN109177241A (en) * | 2018-08-15 | 2019-01-11 | 呼和浩特市博洋可再生能源有限责任公司 | A kind of small-sized wind power generator wooden core fiberglass blade manufacture craft |
-
2010
- 2010-01-25 CN CN 201010100404 patent/CN101767469A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102416700A (en) * | 2011-08-31 | 2012-04-18 | 乔治富 | Production technology of vane used for vertical shaft wind driven generator |
| CN104276714A (en) * | 2013-07-04 | 2015-01-14 | 山西中日威尔森环保技术开发有限公司 | Vacuum diversion one-shot forming purification tank |
| CN108688202A (en) * | 2017-04-11 | 2018-10-23 | 玉门市艾郎风电科技发展有限公司 | A kind of outer bound edge bag pressure device of wind electricity blade |
| CN107856327A (en) * | 2017-10-10 | 2018-03-30 | 上海致远绿色能源股份有限公司 | Spar cap and blade shell one pouring and forming process |
| CN109177241A (en) * | 2018-08-15 | 2019-01-11 | 呼和浩特市博洋可再生能源有限责任公司 | A kind of small-sized wind power generator wooden core fiberglass blade manufacture craft |
| CN109177241B (en) * | 2018-08-15 | 2020-10-30 | 呼和浩特市博洋可再生能源有限责任公司 | Manufacturing process of wood-core glass fiber reinforced plastic blade of small wind driven generator |
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Application publication date: 20100707 |