CN105464898A - Rotor blade structure of wind turbine and preparation method of rotor blade structure - Google Patents
Rotor blade structure of wind turbine and preparation method of rotor blade structure Download PDFInfo
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- CN105464898A CN105464898A CN201510868028.1A CN201510868028A CN105464898A CN 105464898 A CN105464898 A CN 105464898A CN 201510868028 A CN201510868028 A CN 201510868028A CN 105464898 A CN105464898 A CN 105464898A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The invention discloses a rotor blade structure of a wind turbine and a preparation method of the rotor blade structure. The rotor blade structure of the wind turbine is formed by connecting two or more blade segments made of composites through a plurality of double-end studs. Connecting bolt sets comprise the double-end studs, embedded bolt sleeves and polished sleeves. Prefabricated prostheses capable of being taken out are embedded in the tail ends of the embedded polished sleeves. The bolt sleeves and the polished sleeves are connected through the double-end studs and nuts to connect the blade segments, and the bolt sleeves and the polished sleeves are alternately arranged to reduce the influence of the prostheses on structural strength. Locating flanges are fixed to a mold, outer-layer fiber cloth is laid, the bolt sleeves, the polished sleeves and the prostheses are fixed in sequence, wedge-shaped strips made of composites and light materials are contained, inner-layer fiber cloth is laid, auxiliary vacuum materials are laid, suction and injection of all the blade segments are completed, all the prostheses are taken out, the nuts are sequentially aligned and screwed, and assembly of the blade segments is completed.
Description
Technical field
The present invention relates to a kind of rotor blade of wind turbine, rotor blade structure segmented wind electricity blade particularly relating to a kind of wind turbine and preparation method thereof, belongs to wind electricity blade manufacture method.
Background technique
The utilization of a large amount of fossil energy also increases the burden of ball ecological environment while promoting technical development, pollution of atmosphere threatens the life and health of the mankind, renewable energy sources becomes the energy resources of prioritizing selection gradually, more importantly position will be occupied in various countries' energy resource structure, wind energy, as a kind of renewable energy sources form, has development cost lower, technology maturation, the advantage such as widely distributed, becomes the emphasis direction of Renewable Energy Development in recent years.In order to make full use of wind energy resources, wind energy conversion system also progressively moves towards to maximize, its length of blade also constantly increases, and some remote mountain areas often, region that wind-resources is abundant, unfrequented desert zone, transportation condition is poor, and transport linear leaf is quite difficult, and after blade arrives certain length, this is also transport the scope of forbidding.As can be seen here, wind energy conversion system maximizes and is subject to the restriction of traffic condition.
Current, wind electricity blade generally adopts fiber reinforced polymer matrix composite manufacture, and composite material blade production process has harsh requirement, a lot of wind energy turbine set to be located in the serious or humidity of dust storm, place that salinity is very high to environment and technique.Under this environment, the quality of production of wind electricity blade is difficult to effective guarantee, and the carbon fiber used in overlength blade, more responsive to conditions of manufacture due to it, leaf quality is difficult to control especially.Near wind energy turbine set, build blade production base also there is narrow limitation geographically, radiation scope is limited, and significantly can increase the overall cost of blade.As can be seen here, when after length of blade to certain limit, all there are many restraining factors being difficult to overcome in traditional integral blade in production, transport and installation process, therefore, adopt sectional-type blade, in existing plant produced, fragmented transport, Assembling are the effective ways solving Wind turbines maximization.
Sectional-type blade needs to assemble each parts before lifting, formed an aerodynamic configuration continuously, structural integrity, multiple functional entirety.The T-shaped bolt of the many employings of existing sectional-type blade realizes the connection of blade structure, this mode needs to punch and positioning action to connection section composite structure, this requires quite harsh to drilling precision and geometry location, on location, the deviation of allowing is very little, only in this way could ensure the precise match of link, when assembling, also there is the narrow and small problem in operating space in which, all very high to workman's technology and equipment level requirement of execute-in-place.Therefore, the structure of segmented wind electricity blade itself directly affects its assembly method, simultaneously, T-shaped bolt connects because coupling stiffness is low, and joint efficiency is low, is unfavorable for reliability of structure, therefore, be necessary to improve structure of existing wind energy conversion system sectional-type blade and preparation method thereof.
Summary of the invention
For the above-mentioned shortcoming and defect of prior art, technical problem to be solved by this invention is to provide wind turbine rotor blade structure that a kind of joint efficiency is high, aerodynamic loss is little and simple to operate and preparation method thereof.
According to an aspect of the present invention, the technological scheme that the present invention takes for its technical problem of solution is:
A kind of rotor blade structure of wind turbine, comprise at least one first leaf segments and at least one second leaf segments, it is characterized in that, use some connecting bolt groups to be linked in sequence into a blade integral successively between each leaf segments, each described leaf segments all adopts composite plys manufacture or partly adopts metallic material manufacture.
Described leaf segments comprises covering main body, and described connecting bolt group comprises stud, nut, bolt sleeve and light cover, wherein,
Described bolt sleeve and light cover are embedded in advance and are alternately arranged in the connecting end of described covering main body, and bolt sleeve in same leaf segments and the tail end that light overlap are at least substantially concordant with the connecting end surface of this leaf segments; Described covering main body also offers some pseudocoeles, and pseudocoele correspondence described in each is arranged on the exhibition of light cover described in end; Light on bolt sleeve on described first leaf segments and described second leaf segments overlaps coaxially arranged, and the light cover on described first leaf segments is coaxially arranged with the bolt sleeve on described second leaf segments;
Described stud is arranged in the bolt sleeve of first and second leaf segments adjacent and light cover, one end of described stud is anchored in the bolt sleeve of a leaf segments, and the other end is through after the light cover of another leaf segments corresponding, the fastening nuts overlapped in the pseudocoele of end is connected with being arranged in this light.
Covering main body end face is arrangement bolt sleeve and light cover alternately, can reduce the impact of pseudocoele on structural strength to greatest extent.
Preferably, between adjacent described bolt sleeve and light cover, be equipped with long wedge-shaped bar firm to ensure that pre-embedded bolt cover and light overlap, realize the efficient transmission of load.
Preferably, described pseudocoele has laid by pre-buried prosthese the cavity formed after cutting is taken out at blade; Be provided with internal thread in described pre-buried prosthese, when preparing leaf segments, described pre-buried prosthese is arranged on light cover end, and short wedge-shaped bar is laid in the other end of pre-buried prosthese, adopts the screw-internal thread fit in holding down bolt and pre-buried prosthese to fix light cover; Described pseudocoele and light cover support the use, and along blade exhibition to the end being arranged in light cover, its Main Function is for nut reserves the operating space of tools for bolts ' pretension and installation.
Preferably, described bolt sleeve is the female hollow cylindrical metallic sheath of band, and its helical thread portion is connected with stud one end, and described light cover is not tapped hollow cylindrical metallic sheath, its internal diameter is greater than the external diameter of stud, provides certain tolerance limit for assembling with stud.
Preferably, near attachment portion, its outer surface has consistent gas dynamics profile to the covering main body of each described leaf segments, thus after ensureing that each leaf segments connects, pneumatic equipment blades made entirety has good aerodynamics property.
According to a further aspect in the invention, the present invention additionally provides a kind of preparation method of rotor blade structure of wind turbine for technological scheme that its technical problem of solution is taked, comprises the following steps:
(1) each leaf segments is manufactured separately, in blade mold, first lay glass outer Steel Fibre cloth;
(2) at blade mold segmented cross section end winding support locating flange, holding down bolt interval fixing bolt cover is adopted;
(3) place pre-buried prosthese in light cover end, adopt the screw-thread fit in holding down bolt and pre-buried prosthese to fix light cover, lay short wedge-shaped bar at pre-buried dummy ends;
(4) between light cover and bolt sleeve, long wedge-shaped bar is laid;
(5) on light cover, bolt sleeve, wedge-shaped bar layer, inner fiber cloth is laid;
(6) after above-mentioned parts have been laid, adopt vacuum suction injecting method to complete the manufacture of leaf segments shell construction, bonding suction surface and pressure side and shear web form intactly leaf segments structure;
(7) pre-buried prosthese cutting is taken out after having prepared by leaf segments, adopts stud to connect into integral blade adjacent leaf segments.
Compared with the existing technology, the rotor blade structure and preparation method thereof of wind turbine of the present invention has following significant technique effect:
1, the rotor blade structure of wind turbine of the present invention can realize the segmentation manufacture of pneumatic equipment blades made, fragmented transport and assembled in situ, greatly reduces transport and manufacture cost;
2, the rotor blade structure of wind turbine of the present invention adopts stud and nut connecting bolt cover and light cover to realize the connection of blade sections, and bolt sleeve and light cover alternately arrangement reduce prosthese to the impact of structural strength.
3, the rotor blade structure of wind turbine of the present invention adopts the form of built-in metal cover, and the bolt of this Connecting format has lower loading coefficient, is conducive to join strength and the reliability of bolt.
4, the rotor blade structure of wind turbine of the present invention adopts pre-buried prosthese to form tools for bolts ' pretension and installing space, can reduce alternate manner and form installing space to the damage of blade composite construction layer.
Accompanying drawing explanation
Fig. 1. the rotor blade structure connecting overall schematic diagram of wind turbine of the present invention;
Fig. 2. the rotor blade structure connecting end surface view of wind turbine;
Fig. 3. the rotor blade structure joint exhibition of wind turbine is to sectional drawing;
Fig. 4. the rotor blade structure internal layer of wind turbine lays schematic diagram;
Fig. 5. the pre-buried prosthese schematic diagram of rotor blade structure of wind turbine.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly understand, below in conjunction with specific embodiment, and with reference to accompanying drawing, the present invention is described in more detail.
As shown in Figure 1, the rotor blade structure of wind turbine of the present invention, comprise at least first and second section of leaf segments I, II, connecting bolt group is used to be linked in sequence into a blade integral successively between first and second leaf segments I, II, first and second leaf segments I, II adopt composite plys manufacture, also can partly adopt metallic material manufacture, and be made up of covering main body 1, stud 2, bolt sleeve 3, light cover 4, pseudocoele 5.
As Figure 1-3, at connecting end surface alternately arrangement bolt sleeve 3 and the light cover 4 of covering main body 1, pseudocoele 5 is arranged in the end of light cover 4, one end connecting bolt cover 3 of stud 2, the other end, through the light cover 4 of docking leaf segments, is connected with nut 10 in pseudocoele 5.As shown in Figure 2, the alternately arrangement along foline direction of bolt sleeve 3 and light cover 4, reduces the impact on blade structure intensity with this.
As shown in Figure 4, leaf segments connecting end internal layer laying structure is made up of bolt sleeve 3, light cover 4, long wedge-shaped bar 7, pre-buried pseudocoele 8 and short wedge-shaped bar 9, long wedge-shaped bar 7 is equipped with between bolt sleeve 3 and light cover 4, be covered with pre-buried prosthese 8 at the end of light cover, the other end of pre-buried prosthese 8 is short wedge-shaped bar 9.As shown in Figure 5, the internal thread 11 of pre-buried prosthese 8, utilizes stud 2 to fix pre-buried prosthese 8 and light cover 4.
Near attachment portion, its outer surface has consistent gas dynamics profile to the covering main body 1 of first and second leaf segments I, II, thus after ensureing that each blade sections connects, pneumatic equipment blades made entirety has good aerodynamics property.
Time prepared by the rotor blade structure of wind turbine of the present invention, carry out according to following steps:
(1) each leaf segments i, ii are manufactured separately, in blade mold, first lay glass outer Steel Fibre cloth 6;
(2) at blade mold segmented cross section end winding support locating flange, holding down bolt interval fixing bolt cover 3 is adopted;
(3) overlap 4 ends at light and place pre-buried prosthese 8, adopt holding down bolt to coordinate with the internal thread 11 of pre-buried prosthese 8 and fix light and overlap 4, lay short wedge-shaped bar 9 in pre-buried prosthese 8 end;
(4) between light cover 4 and bolt sleeve 3, long wedge-shaped bar 7 is laid;
(5) on light cover 4, bolt sleeve 3, long wedge-shaped bar 7 layers, inner fiber cloth 6 is laid;
(6) after above-mentioned parts have been laid, adopt vacuum suction injecting method to complete the manufacture of leaf segments shell construction, bonding suction surface and pressure side and shear web form intactly leaf segments structure;
(7) pre-buried prosthese cutting is taken out after having prepared by leaf segments, adopts stud to connect into integral blade adjacent leaf segments.
Above-described specific embodiment, further describes object of the present invention, technological scheme and beneficial effect.Institute it should be understood that and the foregoing is only specific embodiments of the invention, is not limited to the present invention, within the spirit and principles in the present invention all, and any amendment made, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. the rotor blade structure of a wind turbine, comprise at least one first leaf segments and at least one second leaf segments, it is characterized in that, use some connecting bolt groups to be linked in sequence into a blade integral successively between each leaf segments, each described leaf segments all adopts composite plys manufacture or partly adopts metallic material manufacture.
2. the rotor blade structure of wind turbine according to claim 1, is characterized in that, described leaf segments comprises covering main body, and described connecting bolt group comprises stud, nut, bolt sleeve and light cover, wherein,
Described bolt sleeve and light cover are embedded in advance and are alternately arranged in the connecting end of described covering main body, and bolt sleeve in same leaf segments and the tail end that light overlap are at least substantially concordant with the connecting end surface of this leaf segments; Described covering main body also offers some pseudocoeles, and pseudocoele correspondence described in each is arranged on the exhibition of light cover described in end; Light on bolt sleeve on described first leaf segments and described second leaf segments overlaps coaxially arranged, and the light cover on described first leaf segments is coaxially arranged with the bolt sleeve on described second leaf segments;
Described stud is arranged in the bolt sleeve of first and second leaf segments adjacent and light cover, one end of described stud is anchored in the bolt sleeve of a leaf segments, and the other end is through after the light cover of another corresponding leaf segments, the fastening nuts overlapped in the pseudocoele of end is connected with being arranged in this light.
3. the rotor blade structure of wind turbine according to claim 2, is characterized in that, is equipped with long wedge-shaped bar firm to ensure that pre-embedded bolt cover and light overlap, realizes the efficient transmission of load between adjacent described bolt sleeve and light cover.
4. the rotor blade structure of wind turbine according to claim 3, is characterized in that, described pseudocoele has laid by pre-buried prosthese the cavity formed after cutting is taken out at blade; Be provided with internal thread in described pre-buried prosthese, when preparing leaf segments, described pre-buried prosthese is arranged on light cover end, and short wedge-shaped bar is laid in the other end of pre-buried prosthese, adopts the screw-internal thread fit in holding down bolt and pre-buried prosthese to fix light cover; Described pseudocoele and light cover support the use, and along blade exhibition to the end being arranged in light cover, its Main Function is for nut reserves the operating space of tools for bolts ' pretension and installation.
5. the rotor blade structure of the wind turbine according to above-mentioned any one claim, it is characterized in that, described bolt sleeve is the female hollow cylindrical metallic sheath of band, its helical thread portion is connected with stud one end, described light cover is not tapped hollow cylindrical metallic sheath, its internal diameter is greater than the external diameter of stud, provides certain tolerance limit for assembling with stud.
6. the rotor blade structure of the wind turbine according to above-mentioned any one claim, it is characterized in that, near attachment portion, its outer surface has consistent gas dynamics profile to the covering main body of each described leaf segments, thus after ensureing that each leaf segments connects, pneumatic equipment blades made entirety has good aerodynamics property.
7. the preparation method of the rotor blade structure of the wind turbine according to above-mentioned any one claim, is characterized in that, comprises following manufacturing step:
(1) each blade sections is manufactured separately, in blade mold, first lay glass outer Steel Fibre cloth;
(2) at blade mold segmentation cross section end winding support locating flange, holding down bolt interval fixing bolt cover is adopted;
(3) place pre-buried prosthese in light cover end, adopt the screw-thread fit in holding down bolt and pre-buried prosthese to fix light cover, lay short wedge-shaped bar at pre-buried dummy ends;
(4) between light cover and bolt sleeve, long wedge-shaped bar is laid;
(5) on light cover, bolt sleeve, wedge-shaped bar layer, inner layer glass fibre cloth is laid;
(6) the vacuum suction injecting method that above-mentioned parts have laid rear employing completes the manufacture of blade sections shell construction, and bonding suction surface and pressure side and shear web form complete blade sections structure;
(7) pre-buried prosthese cutting is taken out after having prepared by blade sections, adopts stud to connect into integral blade adjacent blade sections.
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| CN201510868028.1A CN105464898B (en) | 2015-12-01 | 2015-12-01 | A kind of rotor blade structure of wind turbine and preparation method thereof |
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| CN201510868028.1A CN105464898B (en) | 2015-12-01 | 2015-12-01 | A kind of rotor blade structure of wind turbine and preparation method thereof |
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Cited By (6)
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| CN105863956A (en) * | 2016-05-24 | 2016-08-17 | 白银中科宇能科技有限公司 | Wind power blade connecting device |
| CN105952580A (en) * | 2016-05-24 | 2016-09-21 | 白银中科宇能科技有限公司 | Wind power blade and manufacturing technology thereof |
| CN106609726A (en) * | 2016-12-20 | 2017-05-03 | 北京金风科创风电设备有限公司 | Insert for blade, blade and wind generating set |
| CN112523934A (en) * | 2020-12-04 | 2021-03-19 | 上海电气风电集团股份有限公司 | Sectional type blade, manufacturing process and wind generating set |
| CN115234433A (en) * | 2022-08-05 | 2022-10-25 | 浙江大学 | Sectional type composite material wind power blade achieving connection in hybrid connection mode |
| EP4155530A1 (en) * | 2021-09-23 | 2023-03-29 | Wobben Properties GmbH | Wind turbine rotor blade and a method of assembling a wind turbine rotor blade |
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| CN115234433A (en) * | 2022-08-05 | 2022-10-25 | 浙江大学 | Sectional type composite material wind power blade achieving connection in hybrid connection mode |
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| CN105464898B (en) | 2018-10-09 |
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