CN103573563A - Method of beam cap connection for lengthening wind turbine generator blades - Google Patents
Method of beam cap connection for lengthening wind turbine generator blades Download PDFInfo
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- CN103573563A CN103573563A CN201310580570.8A CN201310580570A CN103573563A CN 103573563 A CN103573563 A CN 103573563A CN 201310580570 A CN201310580570 A CN 201310580570A CN 103573563 A CN103573563 A CN 103573563A
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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
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- 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
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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
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Abstract
The invention relates to the method of beam cap connection for lengthening wind turbine generator blades. The method is particularly adopted for connecting beam caps of the blades in the lengthening and improving process of existing wind turbine generator blades. Each reinforced beam cap is manufactured in a beam cap reserved zone between one existing beam cap of one blade and the corresponding beam cap of one blade tip lengthening section, so that the problem of connection of every two existing beam caps is solved. The blades which are lengthened and improved through the method for connecting the beam caps of the wind turbine generator blades are safe and reliable in structure.
Description
Technical field
The present invention relates to a kind of manufacturing technology of blade of wind-driven generator, relate in particular to a kind of beam cap connecting means that lengthens existing blade of wind-driven generator.
Background technique
The wind-driven generator that at least some are known, wind wheel blade, transmission shaft, generator, pylon and related Control System etc., consist of, wind wheel blade has specific pneumatic wing type, after absorbing wind energy, with certain speed, form rotational, then by generator, rotational is transformed into electric energy.
The type selecting of wind power generating set, most important for the project development of a wind energy turbine set, it directly concerns the economic well-being of workers and staff of this wind energy turbine set project.Rule, Unit Selection selects design grade to equal the unit of wind energy turbine set grade as far as possible, and the high unit of design grade can be for the wind energy turbine set of lower grade certainly.From technical standpoint, this selection is no problem, especially high-grade unit is for lower grade wind energy turbine set, the Security that means unit improves, but the problem that this too conservative Unit Selection strategy brings is to fail to realize the interests maximization of wind energy turbine set project development, it is many that this situation occurs in early stage wind energy turbine set exploration project at home, for example, certain III class wind energy turbine set area, the wind energy turbine set unit of exploitation be take 77-1500KW as main in advance, the wind energy turbine set unit of later development be take 82-1500KW as main, the generating income of two wind energy turbine set of front and back exploitation will differ to more than 5%.
Hence one can see that, for the part of generating units of having developed in advance wind energy turbine set, carry out upgrading, still there is very much real value, take 77-1500KW unit as example, this unit was to be applicable to II class wind energy turbine set originally, but in wind energy turbine set exploration project in early days, be applied to III class wind energy turbine set, caused unit output not enough.The 82-1500KW unit of subsequent development is the special a blower fan for domestic III class wind field design, through on-the-spot operation, facts have proved, the reliability of this unit and generating income are better, especially the income of generating electricity aspect is obviously better than 77-1500KW unit, the two maximum difference is exactly length of blade, the length of blade 40.3m of 82-1500KW unit, the length of blade 37.5m of 77-1500KW unit, the two length difference 2.8m, this also means that the wind sweeping area of the two differs from 672 ㎡, this point is particularly useful for the low wind energy turbine set of wind-resources grade, as can be seen here, increase length of blade, to the too conservative unit of the early stage type selecting of upgrading, be very effective.
The turbines vane that upgrading is early stage, be that existing on-hook blade is replaced to a new blade that has increased length, this scheme is easy and simple to handle, but again purchases the new blade of installation because scrapping existing on-hook blade, cause replacement cost higher, greatly increase the rate of return on investment of transformation project; Another kind of scheme is on the basis of existing on-hook blade, lengthen transformation, this scheme technical difficulty is higher, in concrete enforcement, have certain manufacture cost, but cost is far below the cost of changing new blade, and on-bladed product rejection, increase considerably generated energy and the generating income of unit.
Publication number is the patent of CN 102032099 A, the system and method for the rotor blade extension part that uses in assembling wind turbine machine has been proposed, this technological scheme is by a bonding blade tips portion in existing blade and blade tip, and between the two, install some supporting rods additional, realized existing vaned lengthening.But this scheme topology layout is simple, and technique for sticking operability is not strong, make lengthened vanes amount limited, generating income increase DeGrain.
Application number is 201210036187.1 patent, a kind of method of lengthening wind power blade has been proposed, the solution of the method system new and old web between existing blade and blade tip lengthening section structure continuously and the problem such as technique is bonding, the structure of upper-lower casing is continuous and technique is bonding, realized existing vaned lengthening transformation, and further improve lengthened vanes amount, generating income increase effect is more remarkable.But through the method, lengthen the blade of transformation, existing blade beam cap and blade tip lengthening section beam cap are UD glass laying, the thickness of laying and width all do not change, and two sections of beam caps are only bonding by structure glue, this kind of reconstruction structure deposited problem both ways: one, two sections of beam caps are bonding by structure glue, this means that two sections of stress transmission between beam cap UD glass complete by structure glue, cause structure discontinuous, and in structure glue uneven thickness or local starved, part exists under the impact of the negative factors such as bubble, easily cause bonding interface stress to concentrate, under the effect of alternate load, very easily cause fatigue damage, finally cause the destruction of blade beam cap, its two, the distribution of blade self rigidity is identical with the existing blade of not transformation, when length of blade increases, lengthened blades there will be self-deformation amount to increase, and has reduced the headroom value of blade and pylon, has increased the risk that blade is beaten tower.
Summary of the invention
The object of the present invention is to provide a kind of re-manufacturing technology of blade of wind-driven generator, improve on the one hand the stress of existing blade beam cap and blade tip lengthening section beam cap bonding interface and concentrate, thus the risk of reduction blade beam cap fatigue break; The Stiffness Distribution of local optimum lengthened blades, evades the risk that blade is beaten tower on the other hand.
The object of the invention is to reach by following measure: after existing blade and the bonding demoulding of blade tip lengthening section, beam cap trough between existing blade beam cap and blade tip lengthening section beam cap, make a strengthened beam cap, realize the connection of existing two sections of beam caps, this strengthened beam cap has improved two sections of bonding interface effects that beam cap connects greatly, simultaneously local optimum the Stiffness Distribution of lengthened blades, reduced the amount of deformation of blade, guaranteed the reliability of blade structure.
For the beam cap connecting means of above-mentioned lengthening wind electricity blade, be mainly by following process implementation:
The first step: beam cap trough prefabricated
Beam cap trough is divided into twoth district, i.e. existing blade beam cap trough and blade tip lengthening section beam cap trough, and wherein blade tip lengthening section beam cap trough is bonding front prefabricated at vane mold matching.
Existing blade beam cap trough is to realize by the staggered floor polishing to existing blade beam cap, polishing length is not less than 0.5m, originate in lengthening interface, end in the staggered floor transition zone of strengthened beam cap and existing blade beam cap, staggered floor transition zone individual layer staggered floor distance is greater than 50mm, polishing width is identical with the glass laying width of existing blade beam cap, and polishing thickness is identical with the glass laying thickness of the existing blade beam cap at lengthening interface place;
Blade tip lengthening section beam cap trough is that the prosthese by being preset in blade tip lengthening section housing is realized, length is not less than 0.5m, originate in lengthening interface, end in the staggered floor transition zone of strengthened beam cap and blade tip lengthening section beam cap, staggered floor transition zone individual layer staggered floor distance is greater than 50mm, width is identical with the glass laying width of blade tip lengthening section beam cap, and thickness is identical with the glass laying thickness of the existing blade beam cap at lengthening interface place.
After existing blade and the bonding demoulding of blade tip lengthening section, remove the prosthese in blade tip lengthening section housing, existing blade beam cap trough and blade tip lengthening section beam cap trough are linked together, to form beam cap trough.
Second step: the making of strengthened beam cap
At least one in the mixed fibre that the fibre reinforcement of strengthened beam cap comprises Unidirectional fiber, one-way glass fiber, contain carbon fiber, the modulus of fibre reinforcement is at 70-1000GPa, and the resin matrix of strengthened beam cap comprises at least one in epoxy resin, epoxy vingl ester resin, unsaturated polyester resin.
The fibre reinforcement of strengthened beam cap is laid in beam cap trough, length is identical with the length of beam cap trough, width is identical with the width of beam cap trough, thickness is identical with the thickness of beam cap trough, beam cap staggered floor transition zone at existing blade and blade tip lengthening section, need to adopt staggered floor to lay, individual layer staggered floor distance is greater than 50mm.
The corresponding district of covering in strengthened beam cap outside, carries out corresponding glass laying, by vacuum, leads notes technique, and strengthened beam cap and outer skin are one-body molded, realizes being connected of existing blade beam cap and blade tip lengthening section beam cap.
Meanwhile, strengthened beam cap also can be prefabricated in advance, and on specialized mould, vacuum is led injection forming separately, and the strengthened beam cap integral body after moulding is laid in beam cap trough, and by vacuum, lead notes technological forming with blade exterior skin, realize being connected of existing blade beam cap and blade tip lengthening section beam cap.
This beam cap connecting means, the aerodynamic configuration of blade can affect to some extent, in making district corresponding to strengthened beam cap, adopts putty and the leaf personality card plate of blade to carry out correction of the flank shape processing to existing blade, recovers to make the blade aerodynamic configuration in district.
By the enforcement of the inventive method, length of blade can increase at least more than 1.0m by transformation, and the structure of blade is more safe and reliable, be mainly manifested in: by vacuum, lead notes technological forming on the one hand, resin can infiltrate uniformly in fiber reinforcement surface, has improved greatly the bonding interface of beam cap transition connection area, has the design of staggered floor overlap joint between existing blade beam cap and strengthened beam cap simultaneously, individual layer staggered floor distance is greater than 50mm, meets the structural design demand of blade beam cap fibre reinforcement; Greatly optimize on the other hand the Stiffness Distribution of lengthened blades, reduced the amount of deformation of blade, thereby increased the headroom value of blade and pylon, evaded the risk that blade is beaten tower.Above-mentioned 2 deficiencies that just in time solve application number 201210036187.1 patents, thus the safety and reliability in 20 years life cycles of lengthened blades effectively guaranteed.
Accompanying drawing explanation
By the description part of carrying out with reference to accompanying drawing hereinafter, can better understand all above-mentioned features, wherein said accompanying drawing shows non-limiting example of the present invention, and described accompanying drawing is:
Fig. 1 is existing blade and blade tip cutting polishing schematic diagram;
Fig. 2 is prefabricated blade tip lengthening section housing schematic diagram;
Fig. 3 is the bonding schematic diagram of matched moulds of existing blade and blade tip lengthening section;
Fig. 4 is Fig. 3 section A-A position view;
Fig. 5 is the location of strengthened beam cap and manufactures schematic diagram;
Fig. 6 is Fig. 5 section B-B position view.
Embodiment
The present invention relates to a kind of beam cap connecting means that lengthens wind electricity blade, described method is mainly by improving the Placement of lengthened blades beam cap, improves the structural reliability of lengthened blades.Below set forth a kind of limiting examples, described existing vaned leaf tip cutting polishing schematic diagram as shown in Figure 1, wherein 1 is existing blade, 4 for lengthening interface, 5 is existing blade beam cap, and 6-1 is existing blade beam cap trough, and 8 is blade guide edge, 9 is blade trailing edge, and 10 is leaf tip housing polishing adhesion zone; As shown in Figure 2, wherein 2 is blade tip lengthening section to described blade tip lengthening section housing, and 3 is blade tip arrester, and 6-2 is blade tip lengthening section beam cap trough, and 7 is blade tip lengthening section beam cap; As shown in Figure 3,4, wherein 6 is beam cap trough to the bonding schematic diagram of matched moulds of existing blade and blade tip lengthening section, to lengthen interface 4 Wei Jiefenliang districts, i.e. and existing blade beam cap trough 6-1 and blade tip lengthening section beam cap trough 6-2; The location of strengthened beam cap and making are with reference to schematic diagram 5,6, and wherein 11 is strengthened beam cap, and it has realized the connection of existing blade beam cap 5 and blade tip lengthening section beam cap 7.
For guaranteeing to lengthen the structural reliability of wind electricity blade, must, after rational structural design and technological design, determine the structure laying of strengthened beam cap and the Placement of taking.
The basic implementation step of described lengthening wind electricity blade beam cap connecting means is as follows:
The first step: beam cap trough prefabricated
Beam cap trough 6 is divided into twoth district, i.e. existing blade beam cap trough 6-1 and blade tip lengthening section beam cap trough 6-2, and wherein blade tip lengthening section beam cap trough is bonding front prefabricated at 6-2 vane mold matching.
Existing blade beam cap trough 6-1 realizes by the staggered floor polishing to existing blade beam cap 5, polishing length is not less than 0.5m, originate in and lengthen interface 4, end in the staggered floor transition zone of strengthened beam cap 11 and existing blade beam cap 5, staggered floor transition zone individual layer staggered floor distance is greater than 50mm, polishing width is identical with the glass laying width of existing blade beam cap 5, and polishing thickness is identical with the glass laying thickness of the existing blade beam cap 5 at lengthening interface 4 places;
Blade tip lengthening section beam cap trough 6-2 is that the prosthese by being preset in blade tip lengthening section 2 housings is realized, length is not less than 0.5m, originate in and lengthen interface 4, end in the staggered floor transition zone of strengthened beam cap 11 and blade tip lengthening section beam cap 7, staggered floor transition zone individual layer staggered floor distance is greater than 50mm, width is identical with the glass laying width of blade tip lengthening section beam cap 7, and thickness is identical with the glass laying thickness of the existing blade beam cap 7 at lengthening interface place 4.
After existing blade 1 and the bonding demoulding of blade tip lengthening section 2, remove the prosthese in blade tip lengthening section 2 housings, existing blade beam cap trough 6-1 and blade tip lengthening section beam cap trough 6-2 are linked together, to form beam cap trough 6.
Second step: the making of strengthened beam cap
At least one in the mixed fibre that the fibre reinforcement of strengthened beam cap 11 comprises Unidirectional fiber, one-way glass fiber, contain carbon fiber, the modulus of fibre reinforcement is at 70-1000GPa, and the resin matrix of strengthened beam cap comprises at least one in epoxy resin, epoxy vingl ester resin, unsaturated polyester resin.
The fibre reinforcement of strengthened beam cap 11 is laid in beam cap trough 6, length is identical with the length of beam cap trough 6, width is identical with the width of beam cap trough 6, thickness is identical with the thickness of beam cap trough 6, beam cap staggered floor transition zone at existing blade 1 and blade tip lengthening section 2, need to adopt staggered floor to lay, individual layer staggered floor distance is greater than 50mm.
In the corresponding district of the covering in strengthened beam cap 11 outsides, carry out corresponding glass laying, by vacuum, lead notes technique, strengthened beam cap 11 and outer skin are one-body molded, realize being connected of existing blade beam cap 5 and blade tip lengthening section beam cap 7.
Meanwhile, strengthened beam cap 11 also can be prefabricated in advance, on specialized mould, vacuum is led injection forming separately, strengthened beam cap 11 integral body after moulding are laid in beam cap trough 6, and by vacuum, lead notes technological forming with blade exterior skin, realize being connected of existing blade beam cap 5 and blade tip lengthening section beam cap 7.
This beam cap connecting means, the aerodynamic configuration of blade can affect to some extent, in the making district of strengthened beam cap 11 correspondences, adopts putty and the leaf personality card plate of blade to carry out correction of the flank shape processing to existing blade, recovers to make the blade aerodynamic configuration in district.
embodiment 1
The first step: existing blade beam cap trough prefabricated
1a, as shown in Figure 1, the sign of existing blade cuts Sanding Area, with reference to the structure and the process requirements that lengthen wind electricity blade, identifies and lengthens interface 4, existing blade beam cap trough 6-1, leaf tip housing polishing adhesion zone 10;
The polishing of 1b, existing blade beam cap trough 6-1, tag line with reference to 1a carries out grinding process, polishing length is at 0.5-20.0m, originate in and lengthen interface 4, end in the staggered floor transition zone of strengthened beam cap 11 and existing blade beam cap 5, transition zone individual layer staggered floor distance is greater than 100mm, and polishing width is with existing blade beam cap glass laying width, and polishing thickness is with lengthening interface 4 place's existing beam cap glass laying thickness;
The polishing in 1c, leaf tip case bonding district 10, carries out grinding process with reference to 1a tag line, forms a coarse bonding plane, and the length of this adhesion zone is at 0.2m-1.0m;
It should be noted that, existing blade beam cap trough prefabricated also can carry out after the bonding demoulding of existing blade and blade tip lengthening section, and the method for grinding process is with 1a and 1b.
Second step: blade tip lengthening section beam cap trough prefabricated
2a, blade tip lengthening section 2 housings are divided into upper shell and lower shell body, and prefabricated specialized mould be also divided into upper-lower casing prefabricated mould corresponding to it carries out surface maintenance to mould and process, and comprises the processing such as clean film, sealant and releasing agent;
2b, structure laying design with reference to blade tip lengthening section 2 housings, carry out on-the-spot laying operation, consider that housing has the structural design of strengthened beam cap, and strengthened beam cap is to make after the blade demoulding, therefore in the prefabricated stage, need to consider the making of blade tip lengthening section beam cap trough 6-2, at trough 6-2, first with prosthese, fill, with housing vacuum, lead injection forming, prosthese length is at 0.5-3.5m, originate in and lengthen interface 4, end in the staggered floor transition zone of strengthened beam cap 11 and blade tip lengthening section beam cap 7, transition zone individual layer staggered floor distance is greater than 100mm, width is with blade tip lengthening section beam cap 7 glass laying width, thickness is with lengthening interface 4 place's existing beam cap glass laying thickness,
2c, the auxiliary material of laying vacuum, between the prosthese of blade tip lengthening section beam cap trough 6-2 and housing, need to have demoulding medium, as release cloth or plastic wrap etc., housing inner and outer surface need adopt release cloth, to form effective bonding plane, carry out vacuum and lead notes, resin system adopts epoxy resin, and carries out the Procuring of product;
The 3rd step: the pretreatment of beam cap trough
3a, after existing blade 1 and the bonding demoulding of blade tip lengthening section 2, remove the prosthese in blade tip lengthening section housing, existing blade beam cap trough 6-1 and blade tip lengthening section beam cap trough 6-2 connect together;
3b, the transition zone that is connected of trough 6-1 and 6-2 is carried out necessary polishing correction of the flank shape and processed, form beam cap trough 6;
3c, in order to guarantee the adhesive effect of beam cap trough 6, need to carry out cleaning to bonding plane.
The 4th step: the making of strengthened beam cap
4a, in beam cap trough 6, carry out the laying of fibre reinforcement, fibre reinforcement is Unidirectional fiber, and the modulus of fibre reinforcement is at 200-300GPa; Laying length, with the length of trough 6, is laid width with the width of trough 6, and laying depth, with the thickness of trough 6, in the beam cap staggered floor transition zone of existing blade and blade tip lengthening section, needs to adopt staggered floor to lay, and individual layer staggered floor distance is greater than 100mm.
4b, the corresponding district of the covering in strengthened beam cap 11 outsides, carry out corresponding glass laying, by vacuum, leads notes technique, strengthened beam cap 11 and outer skin are one-body molded, realize being connected of existing blade beam cap 5 and blade tip lengthening section beam cap 7, wherein, resin matrix is epoxy resin.
4c, this beam cap connecting means, destroyed the local aerodynamic configuration of blade, in the making district of strengthened beam cap 11 correspondences, adopts putty and the leaf personality card plate of blade to carry out correction of the flank shape processing to existing blade, recovers to make the blade aerodynamic configuration in district.
4d, to lengthening wind electricity blade, carry out that reprocessing, the blade paint of trailing edge before blade processed, the operations such as counterweight of blade, complete the lengthening reforming processing of whole blade.
Meanwhile, strengthened beam cap 11 described in 4a and 4b also can be prefabricated in advance, laying information with reference to above-mentioned strengthened beam cap 11, on specialized mould, vacuum is led injection forming separately, strengthened beam cap 11 integral body after moulding are laid in beam cap trough 6, and by vacuum, lead notes technological forming with blade exterior skin, realize being connected of existing blade beam cap 5 and blade tip lengthening section beam cap 7.
embodiment 2
The first step: existing blade beam cap trough prefabricated
The sign of 1a, existing blade cuts Sanding Area, with reference to the structure and the process requirements that lengthen wind electricity blade, identifies and lengthens interface 4, existing blade beam cap trough 6-1, leaf tip housing polishing adhesion zone 10;
The polishing of 1b, existing blade beam cap trough 6-1, tag line with reference to 1a carries out grinding process, polishing length is at 0.5-20.0m, originate in and lengthen interface 4, end in the staggered floor transition zone of strengthened beam cap 11 and existing blade beam cap 5, transition zone individual layer staggered floor distance is greater than 100mm, and polishing width is with existing blade beam cap glass laying width, and polishing thickness is with lengthening interface 4 place's existing beam cap glass laying thickness;
The polishing in 1c, leaf tip case bonding district 10, carries out grinding process with reference to 1a tag line, forms a coarse bonding plane, and the length of this adhesion zone is at 0.2m-1.0m;
It should be noted that, existing blade beam cap trough prefabricated also can carry out after the bonding demoulding of existing blade and blade tip lengthening section, and the method for grinding process is with 1a and 1b.
Second step: blade tip lengthening section beam cap trough prefabricated
2a, blade tip lengthening section 2 housings are divided into upper shell and lower shell body, and prefabricated specialized mould be also divided into upper-lower casing prefabricated mould corresponding to it carries out surface maintenance to mould and process, and comprises the processing such as clean film, sealant and releasing agent;
2b, structure laying design with reference to blade tip lengthening section 2 housings, carry out on-the-spot laying operation, consider that housing has the structural design of strengthened beam cap, and strengthened beam cap is to make after the blade demoulding, therefore in the prefabricated stage, need to consider the making of blade tip lengthening section beam cap trough 6-2, for realizing this structure and process requirements, can first in prosthese mode, fill at blade tip lengthening section beam cap trough 6-2, with housing vacuum, lead injection forming, prosthese length is at 0.5-3.5m, originate in and lengthen interface 4, end in the staggered floor transition zone of strengthened beam cap 11 and blade tip lengthening section beam cap 7, transition zone individual layer staggered floor distance is greater than 100mm, width is with blade tip lengthening section beam cap glass laying width, thickness is with lengthening interface 4 place's existing beam cap glass laying thickness,
2c, the auxiliary material of laying vacuum, between the prosthese of blade tip lengthening section beam cap trough 6-2 and housing, need to have demoulding medium, as release cloth or plastic wrap etc., housing inner and outer surface need adopt release cloth, to form effective bonding plane, carry out vacuum and lead notes, resin system adopts epoxy resin, and carries out the Procuring of product;
The 3rd step: the pretreatment of beam cap trough
3a, after existing blade 1 and the bonding demoulding of blade tip lengthening section 2, remove the prosthese in blade tip lengthening section housing, existing blade beam cap trough 6-1 and blade tip lengthening section beam cap trough 6-2 connect together;
3b, the transition zone that is connected of trough 6-1 and 6-2 is carried out necessary polishing correction of the flank shape and processed, form beam cap trough 6;
3c, in order to guarantee the adhesive effect of beam cap trough 6, need to carry out cleaning to bonding plane.
The 4th step: the making of strengthened beam cap
4a, in beam cap trough 6, carry out the laying of fibre reinforcement, fibre reinforcement is one-way glass fiber, and the modulus of fibre reinforcement is at 70-100GPa; Laying length, with the length of trough 6, is laid width with the width of trough 6, and laying depth, with the thickness of trough 6, in the beam cap staggered floor transition zone of existing blade and blade tip lengthening section, needs to adopt staggered floor to lay, and individual layer staggered floor distance is greater than 100mm.
4b, the corresponding district of the covering in strengthened beam cap 11 outsides, carry out corresponding glass laying, by vacuum, leads notes technique, strengthened beam cap 11 and outer skin are one-body molded, realize being connected of existing blade beam cap 5 and blade tip lengthening section beam cap 7, wherein, resin matrix is epoxy resin.
4c, this beam cap connecting means, destroyed the local aerodynamic configuration of blade, in the making district of strengthened beam cap 11 correspondences, adopts putty and the leaf personality card plate of blade to carry out correction of the flank shape processing to existing blade, recovers to make the blade aerodynamic configuration in district.
4d, to lengthening wind electricity blade, carry out that reprocessing, the blade paint of trailing edge before blade processed, the operations such as counterweight of blade, can complete the lengthening reforming processing of whole blade.
Meanwhile, strengthened beam cap 11 described in 4a and 4b also can be prefabricated in advance, laying information with reference to above-mentioned strengthened beam cap 11, on specialized mould, vacuum is led injection forming separately, strengthened beam cap 11 integral body after moulding are laid in beam cap trough 6, and by vacuum, lead notes technological forming with blade exterior skin, realize being connected of existing blade beam cap 5 and blade tip lengthening section beam cap 7.
Above-mentioned information has been described the present invention with reference to preferred embodiment.But scope of the present invention is not limited to illustrated embodiment, and can realize alternative and remodeling in the situation that not departing from the scope of the invention.
Claims (10)
1. a beam cap connecting means that lengthens blade of wind-driven generator, it is characterized in that, after existing blade (1) and the bonding demoulding of blade tip lengthening section (2), beam cap trough (6) between existing blade beam cap (5) and blade tip lengthening section beam cap (7), make a strengthened beam cap (11), realize the connection between described existing blade beam cap (5) and described blade tip lengthening section beam cap (7).
2. method as claimed in claim 1, it is characterized in that, at least one in the mixed fibre that the fibre reinforcement of described strengthened beam cap (11) comprises Unidirectional fiber, one-way glass fiber, contain carbon fiber, the modulus of described fibre reinforcement is at 70-1000GPa, and the resin matrix of described strengthened beam cap (11) comprises at least one in epoxy resin, epoxy vingl ester resin, unsaturated polyester resin.
3. method as claimed in claim 1, it is characterized in that, described beam cap trough (6) is divided into twoth district, i.e. existing blade beam cap trough (6-1) and blade tip lengthening section beam cap trough (6-2), and wherein said blade tip lengthening section beam cap trough (6-2) is bonding front prefabricated at vane mold matching.
4. method as claimed in claim 3, it is characterized in that, described existing blade beam cap trough (6-1) is to realize by the staggered floor polishing to existing blade beam cap (5), polishing length is not less than 0.5m, originate in and lengthen interface (4), end in the staggered floor transition zone of described strengthened beam cap (11) and described existing blade beam cap (5), described staggered floor transition zone individual layer staggered floor distance is greater than 50mm, polishing width is identical with the glass laying width of existing blade beam cap (5), the glass laying thickness of the existing blade beam cap (5) that polishing thickness is located with described lengthening interface (4) is identical.
5. method as claimed in claim 3, it is characterized in that, described blade tip lengthening section beam cap trough (6-2) is that the prosthese by being preset in blade tip lengthening section housing is realized, length is not less than 0.5m, originate in and lengthen interface (4), end in the staggered floor transition zone of described strengthened beam cap (11) and described blade tip lengthening section beam cap (7), described staggered floor transition zone individual layer staggered floor distance is greater than 50mm, width is identical with the glass laying width of described blade tip lengthening section beam cap (7), the glass laying thickness of the existing blade beam cap (5) that thickness is located with described lengthening interface (4) is identical.
6. method as claimed in claim 3, it is characterized in that, after described existing blade (1) and the bonding demoulding of described blade tip lengthening section (2), remove the prosthese in blade tip lengthening section housing, described existing blade beam cap trough (6-1) and described blade tip lengthening section beam cap trough (6-2) are linked together, to form described beam cap trough (6).
7. method as described in any one among claim 2-6, it is characterized in that, the fibre reinforcement of described strengthened beam cap (11) is laid in described beam cap trough (6), length is identical with the length of described beam cap trough (6), width is identical with the width of described beam cap trough (6), thickness is identical with the thickness of described beam cap trough (6), beam cap staggered floor transition zone at described existing blade (1) and described blade tip lengthening section (2), need to adopt staggered floor to lay, individual layer staggered floor distance is greater than 50mm.
8. method as described in any one among claim 1-6, it is characterized in that, the corresponding district of covering in described strengthened beam cap (11) outside, carry out corresponding glass laying, by vacuum, lead notes technique, described strengthened beam cap and outer skin are one-body molded, realize being connected of described existing blade beam cap (5) and described blade tip lengthening section beam cap (7).
9. method as described in any one among claim 1-6, it is characterized in that, described strengthened beam cap (11) is prefabricated in advance, on specialized mould, vacuum is led injection forming separately, described strengthened beam cap integral body after moulding is laid in described beam cap trough (6), and by vacuum, lead notes technological forming with blade exterior skin, realize being connected of described existing blade beam cap (5) and described blade tip lengthening section beam cap (7).
10. method as described in any one among claim 1-6, it is characterized in that, in making district corresponding to described strengthened beam cap (11), adopt putty and the leaf personality card plate of blade to carry out correction of the flank shape processing to described existing blade (1), recover to make the blade aerodynamic configuration in district.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310580570.8A CN103573563B (en) | 2013-11-19 | 2013-11-19 | A kind of spar cap method of attachment lengthening blade of wind-driven generator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310580570.8A CN103573563B (en) | 2013-11-19 | 2013-11-19 | A kind of spar cap method of attachment lengthening blade of wind-driven generator |
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| CN103573563A true CN103573563A (en) | 2014-02-12 |
| CN103573563B CN103573563B (en) | 2016-08-17 |
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| CN201310580570.8A Expired - Fee Related CN103573563B (en) | 2013-11-19 | 2013-11-19 | A kind of spar cap method of attachment lengthening blade of wind-driven generator |
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| CN105065196A (en) * | 2015-07-30 | 2015-11-18 | 中国大唐集团新能源股份有限公司 | Blade lengthened type fan |
| CN106150894A (en) * | 2015-04-27 | 2016-11-23 | 陆中源 | Hat shape blade tip stretches wind turbine blade |
| CN109882364A (en) * | 2019-03-26 | 2019-06-14 | 株洲时代新材料科技股份有限公司 | A kind of carbon fiber wind electricity blade crossbeam and preparation method thereof |
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| CN113074089A (en) * | 2021-03-19 | 2021-07-06 | 三一重能股份有限公司 | Blade main beam layer structure, blade, wind turbine generator and main beam forming process |
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| CN106150894A (en) * | 2015-04-27 | 2016-11-23 | 陆中源 | Hat shape blade tip stretches wind turbine blade |
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| CN103573563B (en) | 2016-08-17 |
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