CN102926945B - Multi-segment wind turbine blade connected by U-shaped strengthening devices and assembling method thereof - Google Patents
Multi-segment wind turbine blade connected by U-shaped strengthening devices and assembling method thereof Download PDFInfo
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- CN102926945B CN102926945B CN201210453863.5A CN201210453863A CN102926945B CN 102926945 B CN102926945 B CN 102926945B CN 201210453863 A CN201210453863 A CN 201210453863A CN 102926945 B CN102926945 B CN 102926945B
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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 multi-segment wind turbine blade connected by U-shaped strengthening devices and an assembling method of the multi-segment wind turbine blade connected by the U-shaped strengthening devices. The blade comprises two or more blade segments, wherein a strengthening edge vertically extending inwards is arranged at each connected edge of the blade segments; and the strengthening edges are punched, and the blade segments are connected by the U-shaped strengthening devices. According to the invention, the problem that when a long blade of a large wind turbine is difficult in transportation, high in cost, and high in requirements for a road can be solved; and simultaneously, the blade of the wind turbine has the advantages that the manufacturing process is easy, the on-site mounting is convenient, the maintenance is simple, and the cost is low.
Description
Technical field
The present invention relates to a kind of blade of wind-driven generator, relate in particular to blade and assembly method thereof that a kind of multistage connects, belong to the component of wind power plant.
Background technique
Along with the minimizing of fossil energy, it is more and more important that renewable energy sources becomes, by the main power progressively becoming in future source of energy structure, it is lower that wind energy has development cost as a part of renewable energy sources, technology maturation, the advantage such as widely distributed, becomes the emphasis of Renewable Energy Development in recent years.Continuous progress along with technology, wind energy conversion system also progressively moves towards to maximize, its length of blade also constantly increases, and the abundant place of the wind-resources rugged ridge of some physical features or sea often, traffic is severe, transporting blade is difficulty quite, and work as length of blade, arrives certain scope, and also transportation is forbidden.Therefore wind energy conversion system maximizes and is subject to the serious restriction of traffic condition.
Current pneumatic equipment blades made generally adopts fibre reinforced composites manufacture, and that composite material blade is produced environment and technological requirement is harsh especially, and a lot of wind energy turbine set are all in the serious or humidity of nearly dust storm, place that salinity is very high.Under this environment, the pneumatic equipment blades made quality of production is difficult to control, and following super sized type pneumatic equipment blades made can use carbon fiber, and this material is more responsive to technique and environment.Also there is the narrow limitation on region building blade production base near wind energy turbine set, and can significantly increase manufacture cost.As can be seen here, when length of blade is to certain limit, all there is many deficiencies in traditional integral blade in production, transportation and installation process, thereby, adopt multi-section type blade, in original plant produced, segmentation transportation, Assembling are to solve the effective ways that wind energy conversion system maximizes.
Multi-section type blade needs each parts to assemble before lifting, form an aerodynamic configuration continuously, structural integrity, multiple functional integral body.The connections that adopt T-shaped bolt or pre-embedded bolt to realize blade structure of existing multi-section type blade more, this mode need to be carried out pre-buried or precasting process moulding and positioning action to connecting all bolts in cross section simultaneously, this requires quite harsh to blade covering forming craft precision and geometry location, in technique, necessarily require not occur obvious malformation; On location, the deviation of allowing is very little, only in this way could ensure the accurate cooperation of link, and when assembling, which also exists the narrow and small problem in operating space, to workman's technology and equipment level of execute-in-place, requires all very high.Therefore, the structure of multi-section type pneumatic equipment blades made itself directly affects its assembly method, is necessary structure and the assembly method thereof of existing wind energy conversion system multi-section type blade to make improvements.
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 a kind of stable connection, aerodynamic loss is little and assembly connection is simple to operate wind energy conversion system multi-section type blade and assembly connection method thereof.
According to an aspect of the present invention, the present invention is that the technological scheme that its technical problem of solution is taked is:
A kind of wind energy conversion system multistage connects blade, comprise at least two sections of blade sections, between each blade sections, use U-shaped stiffening device to be linked in sequence into successively a blade integral, described blade sections adopts the manufacture of composite material laying, it is characterized in that, described in each, blade sections comprises covering main body and is positioned at the inside vertical extension member of several coverings that blade sections connects end, in covering main body and covering vertical extension member difference processing bolt hole
Described U-shaped stiffening device comprises a U-shaped groove and left and right two wing plates;
The covering vertical extension member of adjacent two blade sections is arranged in the U-shaped groove of a plurality of U-shaped stiffening devices, and is connected and connected by a plurality of bolts, and adjacent covering vertical section adopts gasket seal when connection is fastening;
The covering main body of adjacent two blade sections is connected with the wing plate bolt of U-shaped stiffening device described in each respectively.
Preferably, described in each, wing plate adopts countersunk screw to be connected with covering main body, and U-shaped groove adopts the preferred hex head bolt of polygonal bolt to be connected with covering vertical section.
Preferably, described countersunk screw, its plush copper is embedded in blade covering main body, and its screw rod is towards blade inner side, adopts nut I fastening and with the locking reinforcing of nut II, occurs to connect and become flexible while preventing blade operation.
Preferably, described polygonal bolt, adopts nut III fastening and with the locking reinforcing of nut IV, and its screw rod efficiently transmits with guarantee load towards approximate parallel with axis of runner blade.
Preferably, on the screw rod of described polygonal bolt, have aperture, adjacent two blade sections joints, with the good steel wire penetrating of electric conductivity aperture on polygonal bolt screw rod described in each, all polygonal bolts are together in series, realize current path, and the two ends of wire rope are connected respectively on the conductive cable of adjacent two blade sections, prevent that thunderbolt from destroying blade.
Preferably, described in each, the covering main body of blade sections has consistent gas dynamics profile near its outer surface of attachment portion, thereby after guaranteeing that each blade sections connects, pneumatic equipment blades made integral body has good aerodynamics property.
Preferably, in each wing plate end of described U-shaped stiffening device, respectively establish a Varying-thickness section, guarantee the smooth transition of blade stiffness, the covering vertical extension member junction plane place that described U-shaped stiffening device connects is used sealing joint strip.
Preferably, described in each, covering vertical extension member is equal in length, consistency of thickness, and covering vertical extension member is inwardly equal in length, consistency of thickness.
Preferably, described U-shaped stiffening device adopts single row or multiple rows countersunk screw, polygonal bolt to connect, and U-shaped stiffening device is provided with rounding in notch outside, and in notch inner side, being provided with reinforcement oblique angle increases carrying, reduces stress raisers.
Preferably, the covering main body of same blade sections and the inside vertical extension member of covering are continuous overall structure, and in its corner, outside is provided with rounding.
According to a further aspect in the invention, the present invention, for the technological scheme that solves its technical problem and take also provides a kind of assembly connection method of wind energy conversion system multi-section type blade, comprises the following steps:
(1) connecting end surface of each blade sections is carried out to roughness processing, the chamfering between polishing covering main body and vertical extension member, makes it to meet the required precision of engineering assembling;
(2) after adjacent two blade sections centerings are placed, at blade sections surface of contact, place sealing joint strip;
(3) screw in order nut and lock nut, make U-shaped stiffening device in relaxed state, adjust the attitude of each bolt and U-shaped stiffening device, tighten all bolts, and with the connect bolt of each U-shaped groove of conduction wire rope, the two ends of wire rope are connected on the lightning retardant cable of adjacent two blade sections, two adjacent blade sections cables are connected;
(4) use step (1)-(3) each blade sections that is linked in sequence successively, thereby complete the assembling of wind energy conversion system multistage blade.
Compared with the existing technology, wind energy conversion system multi-section type blade of the present invention and assembly method thereof have following significant technique effect:
1, wind energy conversion system multi-section type blade of the present invention can be realized segmentation manufacture, segmentation transportation and the assembled in situ of pneumatic equipment blades made, greatly reduces transportation and manufacture cost;
2, wind energy conversion system multi-section type blade of the present invention equates consistent with extension width at connection part composite material laying vertical extension member along thickness, reduces technology difficulty.
3, wind energy conversion system multi-section type blade of the present invention adopts countersunk screw to eliminate the adverse effect of connection to aeroperformance in covering main body.
4, wind energy conversion system multi-section type blade pass of the present invention is crossed at hex head bolt head place and is offered aperture, uses conduction wire rope that each bolt and lightning retardant cable are coupled together, and can prevent the damage of thunderbolt to blade.
5, wind energy conversion system multi-section type blade of the present invention adopts independently U-shaped stiffening device connection can reduce the requirement to composite material skin main body moulding process and geometric positioning accuracy, saves and manufactures and installation cost.
Accompanying drawing explanation
Fig. 1. multistage of the present invention connects blade connecting overall schematic diagram;
Fig. 2. blade connects partial left side view (A-A);
Fig. 3. a U-shaped stiffening device bolt connects sectional drawing (B-B);
Fig. 4. blade body and vertical extension member schematic diagram thereof;
Fig. 5 .U type stiffening device profile schematic diagram;
Fig. 6. countersunk screw and hex head bolt profile schematic diagram.
Description of reference numerals: 1 covering main body, the inside vertical extension member of 2 covering, 3U type stiffening device, 4 countersunk screws, 5 hex head bolts, 6 sealing joint strips, 7 countersunk screw holes, 8 bolts hole, the filleted corner of 9 covering main bodys and the inside vertical extension member of covering corner, the bull nose of the inside vertical extension member of 10 coverings and covering corner, 11 Varying-thickness sections, 12 wing plates, 13U type groove, the reinforcement oblique angle of 14 wing plates and inner side, U-shaped concave corner place, rounding outside 15 wing plates and U-shaped groove, 16 bolts hole, 17 bolts hole, 18 screw rods, 19 nuts, 20 lock nuts, 21 screw rods, 22 nuts, 23 lock nuts, 24 wire rope, 25 perforates.
Embodiment
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with specific embodiment, and with reference to accompanying drawing, the present invention is described in more detail.
As shown in Fig. 1-6, wind energy conversion system multistage of the present invention connects blade, comprise at least two sections of blade sections I, II, between blade sections I, II, use U-shaped stiffening device 3 to be linked in sequence into successively a blade integral, blade sections I, II adopt the manufacture of composite material laying, and are comprised of covering main body 1 and the inside vertical extension member 2 of covering.As shown in Figure 4, in covering main body 1 processing bolt hole 7 and the inside vertical extension member of covering 2 processing bolt holes 8.As shown in Figure 5, U-shaped stiffening device 3 is comprised of U-shaped groove 13 and two wing plates 12 and the two Varying-thickness sections 11 that are positioned at two wing plate 12 ends.As shown in Figure 3, when adjacent two blade sections I, II are used U-shaped stiffening device 3, the inside vertical extension member 2 of adjacent two covering is arranged in the U-shaped groove 13 of U-shaped stiffening device 3, wing plate 12 adopts countersunk screw 4 to be connected with covering main body 1, can adopt single countersunk screw 4 to connect, also can adopt many row's countersunk screws 4 to connect.U-shaped groove 13 is connected with covering vertical section 2 employing hex head bolts 5, can adopt single hex head bolt 5 to connect, and also can adopt many row's hex head bolts 5 to connect, and two adjacent covering vertical sections 2 adopt pad 6 sealings when connection is fastening.The plush copper of countersunk screw 4 is embedded in blade covering main body 1, and its screw rod 18 is towards blade inner side, adopts nut 19 fastening and reinforce with lock nut 20, prevents from that blade from occurring to connect when operation to become flexible.Described hex head bolt 5 adopts nuts 22 fastening and with lock nut 23 reinforcings, its screw rod 21 efficiently transmits with guarantee load towards approximate parallel with axis of runner blade, its screw rod 21 has aperture and after tighting a bolt and with conduction wire rope 24, all hex head bolts 5 is together in series, realize current path, and the two ends of wire rope 24 are connected respectively on the conductive cable of adjacent two sections of blades, prevent that thunderbolt from destroying blade.
Preferably, the covering main body 1 of blade sections I, II has consistent gas dynamics profile near its outer surface of attachment portion, thereby after guaranteeing that each blade sections connects, pneumatic equipment blades made integral body has good aerodynamics property.
Preferably, described U-shaped stiffening device 3 has Varying-thickness section 11 in wing plate 12 ends, guarantees the smooth transition of blade stiffness.
Preferably, described covering vertical extension member, its extended length equates, consistency of thickness, it is simple that this design has moulding process, easy for installation, makes U-shaped stiffening device versatility stronger.
Preferably, as shown in Figure 4,5, described U-shaped device 3 can adopt single row or multiple rows countersunk screw 4 to be connected with hex head bolt 5, has good design flexibility.U-shaped device 3 has rounding 15 in notch outside, has the oblique angle 14 of reinforcement to increase carrying in inner side, reduces stress raisers.
Preferably, as shown in Figure 4, described covering main body 1 is continuous overall structure with the inside vertical extension member 2 of covering, and there is rounding 9 its corner inner side, and there is rounding 10 in outside, has guaranteed the continuity of composite material skin structure.
When multi-section type blade is assembled at the scene, according to following steps, carry out:
(1) connecting end surface of each blade sections is carried out to roughness processing, the chamfering between processing covering main body 1 and vertical extension member 2, makes it to meet the required precision of engineering assembling;
(2) on blade rack, adjacent two blade sections centerings are placed, at blade sections surface of contact, place sealing joint strip 6, adjust Leaf orientation and make adjacent blades section and sealing joint strip precision-fit;
(3) screw in order nut 19,22 and lock nut 20,23, make the U-shaped stiffening device 3 can be in relaxed state.Adjust the attitude of countersunk screw 4 and hex head bolt 5 and U-shaped stiffening device 3, make the accurate centering of bolt and bolt hole, tighten countersunk screw 4 and hex head bolt 5, and with conduction wire rope 24 hex head bolt 5 of connecting successively, then the two ends of wire rope are connected on the lightning retardant cable in adjacent blades;
(4) use step (1)-(3) each blade sections that is linked in sequence successively, thereby complete the assembling of wind energy conversion system multistage blade.
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, any modification of making, is equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. a wind energy conversion system multistage connects blade, comprise at least two sections of blade sections (i, ii), between each blade sections (i, ii), use U-shaped stiffening device (3) to be linked in sequence into successively a blade integral, described blade sections (i, ii) adopts the manufacture of composite material laying, it is characterized in that
Described blade sections (i, ii) comprises covering main body (1) and is positioned at the inside vertical extension member of covering (2) that blade sections connects end, in covering main body (1) and the inside vertical extension member of covering (2) difference processing bolt hole (7,8)
Described U-shaped stiffening device (3) comprises a U-shaped groove (13) and left and right two wing plates (12),
The inside vertical extension member of covering (2) of adjacent two blade sections (i, ii) is arranged in the U-shaped groove (13) of a plurality of U-shaped stiffening devices (3), and by a plurality of bolts, the inside vertical extension member of covering (2) is connected and is connected with U-shaped groove (13), between the junction plane of the inside vertical extension member of adjacent two covering (2), establish gasket seal (6); The covering main body (1) of adjacent two blade sections (i, ii) is connected with wing plate (12) bolt of U-shaped stiffening device (3) described in each respectively;
A Varying-thickness section (11) is respectively established in each wing plate (12) end at described U-shaped stiffening device (3), guarantee the smooth transition of blade stiffness, the inside vertical extension member of covering (2) that described U-shaped stiffening device (3) connects is used sealing joint strip (6) at junction plane place.
2. wind energy conversion system multistage according to claim 1 connects blade, it is characterized in that, wing plate described in each (12) adopts countersunk screw (4) to be connected with the covering main body (1) of blade sections (i, ii), and U-shaped groove (13) adopts polygonal bolt (5) to be connected with the inside vertical extension member of covering (2).
3. wind energy conversion system multistage according to claim 2 connects blade, it is characterized in that, described countersunk screw (4), its plush copper is embedded in the covering main body (1) of blade sections (i, ii), its screw rod (18) is towards the inner side of blade sections (i, ii), adopt fastening nuts and reinforce with lock nut, preventing that blade from occurring to connect loosening when operation.
4. wind energy conversion system multistage according to claim 2 connects blade, it is characterized in that, described polygonal bolt (5), adopts fastening nuts and reinforce with lock nut, and its screw rod (21) efficiently transmits with guarantee load towards approximate parallel with axis of runner blade.
5. wind energy conversion system multistage according to claim 4 connects blade, it is characterized in that, on the screw rod (21) of described polygonal bolt (5), have aperture, in adjacent two blade sections (i, ii) joint, with the good wire rope of electric conductivity (24) through the aperture on the screw rod (21) of polygonal bolt (5) described in each, all polygonal bolts (5) are together in series, realize current path, and the two ends of wire rope (24) are connected respectively on the conductive cable of adjacent two blade sections (i, ii), prevent that thunderbolt from destroying blade.
6. according to the wind energy conversion system multistage described in above-mentioned any one claim, connect blade, it is characterized in that, the covering main body (1) of blade sections described in each (i, ii) has consistent gas dynamics profile near its outer surface of attachment portion, thereby after guaranteeing that each blade sections (i, ii) connects, pneumatic equipment blades made integral body has good aerodynamics property.
7. wind energy conversion system multistage according to claim 1 connects blade, it is characterized in that, described in each, the inside vertical extension member of covering (2) is equal in length, consistency of thickness.
8. wind energy conversion system multistage according to claim 1 connects blade, it is characterized in that, described U-shaped stiffening device (3) adopts single row or multiple rows countersunk screws (4), polygonal bolt (5) to connect, U-shaped stiffening device (3) is provided with rounding (15) in notch outside, in notch inner side, being provided with reinforcement oblique angle (14) increases carrying, reduces stress raisers.
9. wind energy conversion system multistage according to claim 1 connects blade, it is characterized in that, the covering main body (1) of same blade sections (i, ii) is continuous overall structure with the inside vertical extension member of covering (2), and in its corner, outside is provided with rounding (9,10).
10. according to the wind energy conversion system multistage described in above-mentioned any one claim, connect the assembly method of blade, it is characterized in that, comprise following installation step:
(1) connecting end surface of each blade sections is carried out to roughness processing, the chamfering between polishing covering main body and the inside vertical extension member of covering, makes it to meet the required precision of engineering assembling;
(2) after adjacent two blade sections centerings are placed, at blade sections surface of contact, place sealing joint strip;
(3) screw in order nut and lock nut, make U-shaped stiffening device in relaxed state, adjust the attitude of each bolt and U-shaped stiffening device, tighten all bolts, and with the connect bolt of each U-shaped groove of conduction wire rope, the two ends of wire rope are connected on the lightning retardant cable of adjacent two blade sections, two adjacent blade sections cables are connected;
(4) use step (1)-(3) each blade sections that is linked in sequence successively, thereby complete the assembling of wind energy conversion system multistage blade.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210453863.5A CN102926945B (en) | 2012-11-13 | 2012-11-13 | Multi-segment wind turbine blade connected by U-shaped strengthening devices and assembling method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210453863.5A CN102926945B (en) | 2012-11-13 | 2012-11-13 | Multi-segment wind turbine blade connected by U-shaped strengthening devices and assembling method thereof |
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| CN102926945A CN102926945A (en) | 2013-02-13 |
| CN102926945B true CN102926945B (en) | 2014-10-29 |
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| CN111692050A (en) * | 2020-07-01 | 2020-09-22 | 上海电气风电集团股份有限公司 | Connecting assembly and fan blade comprising same |
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| CN101749181A (en) * | 2008-12-12 | 2010-06-23 | 通用电气公司 | Turbine blade and method of fabricating the same |
| CN101990599A (en) * | 2008-09-04 | 2011-03-23 | 三菱重工业株式会社 | Wind wheel blade |
| CN102536634A (en) * | 2010-12-08 | 2012-07-04 | 通用电气公司 | Joint sleeve for a rotor blade assembly of a wind turbine |
| CN202320771U (en) * | 2011-09-26 | 2012-07-11 | 江西洪都航空工业集团有限责任公司 | Connecting structure with inner fixture block for cabin sections |
| CN202971054U (en) * | 2012-11-13 | 2013-06-05 | 中国科学院工程热物理研究所 | Multi-section wind driven generator blade connected by U-shaped reinforcing devices |
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2012
- 2012-11-13 CN CN201210453863.5A patent/CN102926945B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101990599A (en) * | 2008-09-04 | 2011-03-23 | 三菱重工业株式会社 | Wind wheel blade |
| CN101749181A (en) * | 2008-12-12 | 2010-06-23 | 通用电气公司 | Turbine blade and method of fabricating the same |
| CN102536634A (en) * | 2010-12-08 | 2012-07-04 | 通用电气公司 | Joint sleeve for a rotor blade assembly of a wind turbine |
| CN202320771U (en) * | 2011-09-26 | 2012-07-11 | 江西洪都航空工业集团有限责任公司 | Connecting structure with inner fixture block for cabin sections |
| CN202971054U (en) * | 2012-11-13 | 2013-06-05 | 中国科学院工程热物理研究所 | Multi-section wind driven generator blade connected by U-shaped reinforcing devices |
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