RO125246A0 - Process and constructive solution for manufacturing twin blades with large external diameter for horizontal shaft wind turbine - Google Patents
Process and constructive solution for manufacturing twin blades with large external diameter for horizontal shaft wind turbine Download PDFInfo
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- RO125246A0 RO125246A0 ROA200900874A RO200900874A RO125246A0 RO 125246 A0 RO125246 A0 RO 125246A0 RO A200900874 A ROA200900874 A RO A200900874A RO 200900874 A RO200900874 A RO 200900874A RO 125246 A0 RO125246 A0 RO 125246A0
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- blade
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- wind turbine
- hub
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- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000004519 manufacturing process Methods 0.000 title abstract 2
- 238000013016 damping Methods 0.000 claims abstract description 3
- 238000005452 bending Methods 0.000 claims description 10
- 239000011152 fibreglass Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 229910000737 Duralumin Inorganic materials 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 239000004917 carbon fiber Substances 0.000 claims description 2
- 239000003562 lightweight material Substances 0.000 claims description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 2
- 229920005989 resin Polymers 0.000 claims description 2
- 239000011347 resin Substances 0.000 claims description 2
- 238000012986 modification Methods 0.000 claims 1
- 230000004048 modification Effects 0.000 claims 1
- 230000002787 reinforcement Effects 0.000 claims 1
- 238000010276 construction Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- RLQJEEJISHYWON-UHFFFAOYSA-N flonicamid Chemical compound FC(F)(F)C1=CC=NC=C1C(=O)NCC#N RLQJEEJISHYWON-UHFFFAOYSA-N 0.000 description 1
- -1 for example Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor
- F03D1/06—Rotors
- F03D1/065—Rotors characterised by their construction elements
- F03D1/0658—Arrangements for fixing wind-engaging parts to a hub
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor
- F03D1/06—Rotors
- F03D1/0608—Rotors characterised by their aerodynamic shape
- F03D1/0633—Rotors characterised by their aerodynamic shape of the blades
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2240/00—Components
- F05B2240/20—Rotors
- F05B2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
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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
-
- 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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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Wind Motors (AREA)
Abstract
Description
femUL DE STAT ^MM INVENȚII Și h , . .FEMALE OF STATE ^ MM INVENTIONS And h,. .
)ata depozit .θ,'ίθ^^) ata depozit .θ, 'ίθ ^^
PROCEDEU SI SOLUȚIE CONSTRUCTIVA PENTRU REALIZAREA PALETELOR JUMELATE DE TURBINA EOLIANA CU AX ORIZONTAL SI DIAMETRE EXTERIOARE MARI.PROCEDURE AND CONSTRUCTION SOLUTION FOR MAKING TWIN BLADES OF WIND TURBINE WITH HORIZONTAL AXIS AND LARGE OUTER DIAMETERS.
Invenția se refera la un procedeu si la o soluție constructiva pentru realizarea paletelor de turbinaa eoliana cu ax orizontal si cu diametre mari, necesara turbinelor eoliene cu puteri mari, in special peste 3,0 MW.The invention relates to a method and to a constructive solution for the realization of the wind turbine blades with horizontal axis and with large diameters, necessary for wind turbines with high powers, especially over 3.0 MW.
Specific acestui domeniu este dimensiunea mare a diametrului exterior al paletelor turbinei eoliene, in prezent depășind lOOm, necesar realizării unei puteri instalate mai mari,de peste 10 MW, ceea ce creste sensibil eficienta investiției,dar induce probleme constructive si de cost deosebite in realizarea paletelor turbinei eoliene cu ax orizontal.Specific to this area is the large size of the outer diameter of the wind turbine blades, currently exceeding 100 m, necessary to achieve a higher installed capacity of over 10 MW, which significantly increases the efficiency of the investment, but induces significant construction and cost problems in making blades. horizontal axis wind turbine.
Cu creșterea diametrului si deci a lungimii paletei, forțele aerodinamice care actioneaza asupra ei, preponerent in direcție axaiala, ca si greutatea proprie in poziția orizontala, conduc la un moment de încovoiere foarte mare la baza paletei (locul de prindere de butuc) ceea ce este cauza principala care limitează creșterea lungimii paletei si ca urmare a limitării creșterii puterii instalate si a eficientei economice a turbinelor eoliene.As the diameter and therefore the length of the blade increase, the aerodynamic forces acting on it, mainly in the axial direction, as well as its own weight in the horizontal position, lead to a very large bending moment at the base of the blade (the hub). the main cause that limits the increase of the blade length and as a result of the limitation of the increase of the installed power and of the economic efficiency of the wind turbines.
De exemplu , pentru o putere instalata de 6,0MW lungimea paletei este de cca 65 m, iar greutatea ei de cca. 18 tone.Se considera ca, din motivele de rezistenta aratate, creșterea greutății paletei este exponențiala cu lungimea, cu o putere de 1,9...2,5 ceea ce conduce la costuri foarte ridicate si la eforturi de încovoiere tot mai mari la baza,in poziție orizontala datorate si greutății propri care limitează creșterea puterii instalate si funcționarea lor la viteze ale vântului de peste 15 m/s.For example, for an installed power of 6.0MW the length of the pallet is about 65 m, and its weight is approx. 18 tons. It is considered that, for the reasons of resistance shown, the increase in the weight of the pallet is exponential with length, with a power of 1.9 ... 2.5 which leads to very high costs and increasing bending efforts at the base, in a horizontal position due to its own weight, which limits the increase of the installed power and their operation at wind speeds of over 15 m / s.
In scopul realizării unor palete de turbine eoliana cu ax orizontal si cu lungime mare, de ordinul zecilor de metri este cunoscut procedeul constând in folosirea unei palete avand o creștere treptata a corzii si a săgeții maxime a profilului aerodinamic al acesteia de la vârf spre baza, cat si a grosimii pereților paletei ,ceea ce conduce la creșterea secțiunii si astfel a modulului de rezistenta a paletei si ca urmare a creșterii momentului de încovoiere admisibil la baza.In order to make wind turbine blades with horizontal axis and long length, of the order of tens of meters is known the procedure consisting in using a blade with a gradual increase of the rope and the maximum arrow of its aerodynamic profile from top to bottom, as well as the thickness of the walls of the blade, which leads to the increase of the section and thus of the modulus of resistance of the blade and as a result of the increase of the permissible bending moment at the base.
Dezavantajul acestui procedeu consta in aceea ca aceasta creștere a secțiunilor si a grosimii paletei spre baza devine tot mai dificila constructiv si tehnologic si, mai ales, oneroasa o data cu creșterea lungimii ei..The disadvantage of this procedure is that this increase of the sections and of the thickness of the pallet towards the base becomes more and more difficult constructively and technologically and, especially, onerous with the increase of its length.
De asemenea, la creșterea lungimii paletei, frecventa proprie fundamentala de vibrație si/sau a armonicelor superioare scade ,ajungând in domeniul frecventei de excitație, indusa de frecventa de rotatie a paletelor, aparand pericolul de rezonanta, nepermis pentru funcționarea turbinei.Also, as the blade length increases, the fundamental fundamental frequency of vibration and / or higher harmonics decreases, reaching the range of excitation frequency, induced by the rotation frequency of the blades, appearing the danger of resonance, not allowed for turbine operation.
In scopul realizării unor palete cat mai lungi, de ordinul zecilor de metri de turbina eoliana ,este cunoscuta soluția constructiva asemanatoare unei elice de avion ,dar cu profilele paletei corespunzând funcției de turbina ,avand o paleta din materiale ușoare si rezistente, de exemlu ,fibra de sticla sau de carbon impregnate cu rășini.Secțiunea paletei are forma de profil aerodinamic,de exemplu Gottingen 622;623,corpul paletei fiind gol in interior doar cu ,eventual,ranforsari interioare , realizând creșterea modulului de rezistenta spre baza,, prin creșterea mărimii secțiunii ,a modificării adecvate a formei sale si a grosimii pereților.In order to make pallets as long as possible, of the order of tens of meters of wind turbine, is known the constructive solution similar to an aircraft propeller, but with the profiles of the blade corresponding to the turbine function, having a blade of light and resistant materials, for example, fiber glass or carbon impregnated with resins. The section of the pallet is in the form of an aerodynamic profile, for example Gottingen 622; section, the appropriate change in its shape and the thickness of the walls.
Dezavantajul acestei soluții constructive este ca rezulta o creștere foarte mare a ariei secțiunii paletei de la vârf spre baza si in consecința si a greutății ei totale ,aceasta crescând in mod exponențial cu lungimea paletei la puterea 1,9...2,5 .Astfel, o paleta cu lungime de 50m are cca lOt, una de 60m are cca 15t, iar una de 80m cca 25t,desi sunt realizate din materiale ușoare,.The disadvantage of this constructive solution is that it results in a very large increase in the area of the blade section from the top to the base and consequently its total weight, which increases exponentially with the length of the blade at a power of 1.9 ... 2.5. , a palette with a length of 50m has about lOt, one of 60m has about 15t, and one of 80m about 25t, although they are made of light materials.
c—2 009-0087 4c — 2 009-0087 4
8 -10- 20098 -10- 2009
Aceasta limitează constructiv si face oneroasa o creștere in continuare, a lungimii paletelor eoliene, condiție esentials pentru creșterea puterii unitare si in consecința a eficientei investiției turbinei eoliene.This constructively limits and makes onerous a further increase in the length of wind turbines, an essential condition for increasing unit power and consequently the efficiency of the investment of the wind turbine.
Pentru realizarea paletelor turbinelor eoliene cu ax orizontal este cunoscut procedeul din cererea de brevet de invenție A/00241/2008 publicat in BOBI nr. 8/2008 ,destinat cu precădere ventilatoarelor axiale ale turnurilor de răcire , care au axa de rotatie verticala, deci planul de rotatie al paletelor este orizontal si care realizează ,de asemenea, marirea modulului de rezistenta spre baza printr-o structura suplimentara de prindere de butuc ,aflata la o distanta de 200-600mm de paleta.For the realization of the blades of wind turbines with horizontal axis, the procedure from the patent application A / 00241/2008 published in BOBI no. 8/2008, intended mainly for axial fans of cooling towers, which have a vertical axis of rotation, so the rotation plane of the blades is horizontal and which also increases the resistance module to the base through an additional clamping structure hub, located at a distance of 200-600mm from the blade.
Dezavantajul acestui procedeu este ca, deși mărește considerabil modulul de rezistenta la baza paletei pe direcția axiala ,pe care actioneaza preponderant momentul incovoietor dat de forțele aerodinamice, nu mărește corespunzător modulul de rezistenta al paletelor in planul de rotatie vertical ,pentru a rezista solicitării suplimentare a paletei la momentul incovoietor dat de greutatea proprie in poziție orizontala,solicitare specifica paletelor lungi de turbina eolianaThe disadvantage of this procedure is that, although it considerably increases the resistance modulus at the base of the blade in the axial direction, which is mainly affected by the bending moment given by the aerodynamic forces, it does not properly increase the resistance modulus of the blades. of the blade at the bending moment given by its own weight in a horizontal position, specific request for long wind turbine blades
Pentru realizarea paletelor de turbina eoliana cu ax orizontal este cunoscuta o soluție constructiva din cererea de brevet de invenție nr A/00241/2008.si publicata in BOBI 8/.2008, in care fiecare paleta este realizata din doua sau mai multe corpuri de palete identice sau asemanatoare, așezate una fata de alta in ceea ce se numește in gazodinamica o rețea de palete.,rigidizate intre ele cu legaturi mecanice .For the realization of the wind turbine blades with horizontal axis, a constructive solution is known from the patent application no. A / 00241/2008. And published in BOBI 8 /. identical or similar, placed facing each other in what is called in gas dynamics a network of vanes., rigid with each other with mechanical connections.
Dezavantajul acestei soluții constructive este ca,fiind destinata preponderant ventilatoarelor axiale ale turnurilor de răcire ,ventilatoare care au planul de rotatie al paletelor orizontal, iar la turbinele eoliene cu ax orizontal , care au paletele rotindu-se in planul vertical, aceasta soluție constructiva nu are posibilitatea creșterii modulului de rezistenta in planul de rotatie pentru a rezista paleta si la momentul incovoietor suplimentar dat de greutatea proprie, maxim in poziția orizontala.The disadvantage of this constructive solution is that, being destined mainly to the axial fans of the cooling towers, fans that have the plane of rotation of the blades horizontally, and to the wind turbines with horizontal axis, that have the blades rotating in the vertical plane, this constructive solution does not have the possibility of increasing the resistance modulus in the plane of rotation in order to resist the blade and at the additional bending moment given by its own weight, maximum in the horizontal position.
Problema tehnica pe care o rezolva invenția este creșterea rezistentei paletei turbinei eoliene cu ax orizontal si in planul de rotatie, pentru a rezista atat la momentul incovoietor dat de forțele preponderant axiale aerodinamice cat si la momentul dat de greutatea proprie, permițând astfel creșterea lungimii paletei si a greutății sale.The technical problem solved by the invention is to increase the resistance of the wind turbine blade with horizontal axis and in the plane of rotation, to withstand both the bending moment given by the predominantly axial aerodynamic forces and the moment of its own weight, thus increasing the length of the blade. of its weight.
Procedeul conform invenției elimina dezavantajele de mai sus prin aceea ca, pentru a creste rezistenta paletei si in planul de rotatie se utilizează o configurație formata din doua sau mai multe palete identice sau asemanatoare ,numite in continuare jumelate, egale ca lungime, sau diferite, rigidizate intre ele prin legaturi transversale cu secțiunea aerodinamica iar fiecare paleta jumelata fiind consolidata in planul de rotatie prin legaturi cu cable fixate de structuri adiacente rigide.The process according to the invention eliminates the above disadvantages in that, in order to increase the strength of the blade and in the plane of rotation, a configuration consisting of two or more identical or similar blades is used, hereinafter called twinned, equal in length, or different, stiffened. between them by transverse connections with the aerodynamic section and each twin blade being consolidated in the rotation plane by cable connections fixed by rigid adjacent structures.
Soluția constructiva conform invenției elimina dezavantajele de mai sus prin aceea ca rotorul turbinei,prevăzut cu numărul necesar de palete jumelate ,adica fiecare avand dispuse in sens axial de curgere una sau mai multe palete identice sau asemanatoare, de aceeași lungime cu prima sau diferita, formând ceea ce se numește in gazodinamica o rețea de palete, aceste palete putând fi paralele sau înclinate una fata de cealalta in sensul azial,adica mai apropiate la vârf decât la baza,fiind rigidizate intre ele cu grinzi transversale avand profil aerodinamic in secțiune si distanțate la baza la prinderea de butuc de ordinul metrilor, fiecare paleta jumelata este susținuta in planul de rotatie, de o parte si de alta de structuri de sprijin rigide , prin intermediul unor cable tensionate la montaj, dimensionate astfel incat sa preia din greutatea paletei, reducând momentul de încovoiere suplimentar al paletei jumelate datorat greutății proprii care este maxim in pozițiaThe constructive solution according to the invention eliminates the above disadvantages by the fact that the turbine rotor, provided with the required number of twin blades, i.e. each having arranged in the axial flow direction one or more identical or similar blades, of the same length as the first or different, forming what is called in gastrodynamics a network of vanes, these vanes can be parallel or inclined to each other in the axial direction, ie closer to the top than the base, being stiffened between them with transverse beams with aerodynamic profile in section and spaced at based on the grip of the hub of the order of meters, each twin blade is supported in the plane of rotation, on either side by rigid support structures, by means of tensioned cables during assembly, dimensioned so as to take the weight of the blade, reducing the moment additional bending of the half pallet due to its own weight which is maximum in position
CS..-2 Ο Ο 9 - Ο Ο 8 Ζ 4CS ..- 2 Ο Ο 9 - Ο Ο 8 Ζ 4
8 -10- 2009 orizontala .Structurile de sprijin au lungime mai mica, de regula, de 30%-40% din lungimea paletelor jumelate susținute.8 -10- 2009 horizontal .Support structures have a shorter length, usually 30% -40% of the length of the supported twin pallets.
Prin aplicarea invenției se obțin următoarele avantaje :By applying the invention, the following advantages are obtained:
- fata de alte tipuri de palete,avand planul de rotatie vertical se realizează o creștere de cel puțin 2-4 ori a rezistentei paletei, in poziție orizontala, la momentul incovoietor dat de greutatea proprie, prin ancorarea de structura de sprijin aflata de o parte si de alta, de care paleta jumelata se leaga cu cabluri tensionate ,permitandu-se creșterea lungimii acesteia peste valori de 70-80m.- compared to other types of pallets, having the vertical rotation plane, an increase of at least 2-4 times of the resistance of the pallet is achieved, in a horizontal position, at the bending moment given by its own weight, by anchoring the support structure on one side and on the other, to which the twin blade is connected with tensioned cables, allowing its length to be increased over values of 70-80m.
- Utilizxarea paletelor jumelate si la lungimi maii,peste 70-80m elimina pericolul de rezonanta, frecventa proprie a paletelor jumelate este de cel puțin 5 ori mai mare decât a celor singulare, la aceeași lungime, atat pe direcție axiala cat si pe direcție tangențiala.- The use of twin blades and at longer lengths, over 70-80m eliminates the danger of resonance, the own frequency of the twin blades is at least 5 times higher than the single ones, at the same length, both in axial and tangential direction.
- Aria secțiunii paletei jumelate cu sprijin lateral in planul de rotatie, in special spre baza, este sensibil mai mica decât cea a paletei singulare, in mod corespunzător si greutatea.Greutatea paletei jumelate creste exponențial cu lungimea doar cu puterea 1,1...1,2 . La o lungime de 80m, avand cca 5,0t, la o aceeași densitate a materialului adica de cca cinci ori mai puțin decât paleta singulara.- The area of the section of the semi-vane with lateral support in the plane of rotation, especially towards the base, is significantly smaller than that of the single vane, correspondingly the weight. 1.2. At a length of 80m, having about 5.0t, at the same density of the material, ie about five times less than the single pallet.
Se dau in continuare doua variante de realizare a invenției, in legătură cu fig 1 si 2 , care reprezintă:There are further two embodiments of the invention, in connection with Figures 1 and 2, which represent:
fig 1 : Vedere si secțiune paleta jumelata de turbina eoliana cu ax orizontalfig 1: View and section of the twin blade of the horizontal axis wind turbine
- fig 2 : Vedere frontala a rotorului cu palete jumelate cu structura de sprijin in planul de rotatie Procedeul conform invenției consta in aceea ca pentru creșterea modulului de rezistenta la baza fiecărei paletei 1, fixata prin intermediul suportului 2 de butucul turbinei eoliene 3 cu ax orizontal se realizează o configurație numita paleta jumelata 4, formata din paleta 1 si una sau mai multe palete 5 asemanatoare sau identice cu prima paleta 1, ca forma si lungime, amplasate una in spatele alteia in direcție axiala (direcția vântului) formând ceaa ce in gazodinamica se numește o rețea de palete a, rigidizate intre ele cu grinzile transversale 6 avand forma aerodinamica in secțiune ,paleta jumelata 4 fiind consolidate suplimentar in planul de rotatie de o parte si de alta, cu cate o structura de sprijin radiala 7 si cablurile 8.- Fig. 2: Front view of the rotor with twin blades with the support structure in the plane of rotation. The method according to the invention consists in increasing the resistance modulus at the base of each blade 1 a configuration called a twin blade 4 is formed, consisting of a blade 1 and one or more blades 5 similar or identical to the first blade 1, in shape and length, placed one behind the other in the axial direction (wind direction) forming the one in gas dynamics it is called a network of blades a, stiffened between them with transverse beams 6 having the aerodynamic shape in section, the twin blade 4 being further consolidated in the plane of rotation on either side, with a radial support structure 7 and cables 8.
Soluția cosntructiva conform invenției consta dintr-o configurație numita paleta jumelata 4 formata din paleta 1 si doua sau mai multe palete 5 asemanatoare cu prima paleta 1 ca forma si lungime si amplasate una in spatele altei pe direcție axiala,paralel sau înclinat,adica mai apropiate la vârf decât la baza, formând ceea ce in gazodinamica se numește o rețea de palete a , fiecare paleta Isi 5 avand un profil aerodinamic si sunt realizate din materiale ușoare de tip duraluminiu ,fibra de sticla sau fibra de carbon impregnate, rigidizate intre ele cu grinzile transversale 6 cu forma aerodinamica in secțiune si montate pe suportul 2 fixat pe butucul 3 iar fiecare paleta jumelata 4 este rigidizată suplimentar, in planul de rotatie ,de cate doua structuri radiale de sprijin 7, construite pe butucul 3, prin intermediul cablurilor 8 avand dispozitivele de întindere si amortizare 9,destinate reglării la montaj a tensionării si preluării in timpul funcționarii a dilatărilor datorita variațiilor de temperatura,cablurile 8 fiind fixate de una din grinzile transversale 6 prin intermediul unei articulatii 10 , aflata intr-o zona din jumatatea inferioara a paletei jumelate 4 si care permite rotirea paletei jumelate 4 in timpul funcționarii.The constructive solution according to the invention consists of a configuration called a twin blade 4 consisting of a blade 1 and two or more blades 5 similar to the first blade 1 in shape and length and placed one behind the other in the axial, parallel or inclined direction, ie closer. at the top than at the base, forming what in gas dynamics is called a network of blades a, each blade Isi 5 having an aerodynamic profile and are made of lightweight materials such as duralumin, fiberglass or carbon fiber impregnated, stiffened together with the transverse beams 6 with aerodynamic shape in section and mounted on the support 2 fixed on the hub 3 and each twin blade 4 is additionally stiffened, in the plane of rotation, by two radial support structures 7, built on the hub 3, by means of cables 8 having tensioning and damping devices 9, designed to adjust the tension and take-up during operation of the expansions due to variations or the temperature, the cables 8 being fixed to one of the transverse beams 6 by means of a joint 10, located in an area in the lower half of the twin blade 4 and which allows the rotation of the twin blade 4 during operation.
Claims (2)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ROA200900874A RO125246A0 (en) | 2009-10-28 | 2009-10-28 | Process and constructive solution for manufacturing twin blades with large external diameter for horizontal shaft wind turbine |
| PCT/RO2009/000025 WO2011053177A1 (en) | 2009-10-28 | 2009-12-09 | Procedure and constructive solution for twin blades used in large diameter wind turbines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ROA200900874A RO125246A0 (en) | 2009-10-28 | 2009-10-28 | Process and constructive solution for manufacturing twin blades with large external diameter for horizontal shaft wind turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| RO125246A0 true RO125246A0 (en) | 2010-02-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ROA200900874A RO125246A0 (en) | 2009-10-28 | 2009-10-28 | Process and constructive solution for manufacturing twin blades with large external diameter for horizontal shaft wind turbine |
Country Status (2)
| Country | Link |
|---|---|
| RO (1) | RO125246A0 (en) |
| WO (1) | WO2011053177A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102434384A (en) * | 2011-11-11 | 2012-05-02 | 张向增 | Novel composite material blade of horizontal shaft wind generating set |
| EP2906819B2 (en) | 2012-10-12 | 2020-07-29 | Joint Blade Rotor A/S | Joined blade wind turbine rotor |
| BR112017005900A2 (en) * | 2014-09-25 | 2017-12-12 | Winfoor Ab | wind turbine rotor blade |
| USD822602S1 (en) | 2015-10-29 | 2018-07-10 | Winfoor Ab | Triblade |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3239087A1 (en) * | 1982-10-22 | 1984-04-26 | István 6482 Bad Orb Horváth | Installation for harnessing wind energy |
| DE20206942U1 (en) * | 2002-05-02 | 2002-08-08 | REpower Systems AG, 22335 Hamburg | Rotor blade for wind turbines |
| ES2322423B1 (en) * | 2007-06-21 | 2010-01-26 | Manuel Torres Martinez | HORIZONTAL SHAFT AEROGENERATOR SHOVEL. |
-
2009
- 2009-10-28 RO ROA200900874A patent/RO125246A0/en unknown
- 2009-12-09 WO PCT/RO2009/000025 patent/WO2011053177A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| WO2011053177A1 (en) | 2011-05-05 |
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