WO2009116961A1 - Rotor d'éolienne à pales multiples possédant un ou plusieurs anneaux intermédiaires de forme aérodynamique - Google Patents

Rotor d'éolienne à pales multiples possédant un ou plusieurs anneaux intermédiaires de forme aérodynamique Download PDF

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Publication number
WO2009116961A1
WO2009116961A1 PCT/UA2009/000004 UA2009000004W WO2009116961A1 WO 2009116961 A1 WO2009116961 A1 WO 2009116961A1 UA 2009000004 W UA2009000004 W UA 2009000004W WO 2009116961 A1 WO2009116961 A1 WO 2009116961A1
Authority
WO
WIPO (PCT)
Prior art keywords
blades
wind
rotor
rings
blade
Prior art date
Application number
PCT/UA2009/000004
Other languages
English (en)
Russian (ru)
Inventor
Евгений ИОСИМОВ
Original Assignee
Izosimov Ievgen
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Izosimov Ievgen filed Critical Izosimov Ievgen
Publication of WO2009116961A1 publication Critical patent/WO2009116961A1/fr

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Classifications

    • 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
    • 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
    • F03D7/00—Controlling wind motors 
    • F03D7/02—Controlling wind motors  the wind motors having rotation axis substantially parallel to the air flow entering the rotor
    • F03D7/022—Adjusting aerodynamic properties of the blades
    • F03D7/0224—Adjusting blade pitch
    • 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
    • F05B2240/33—Shrouds which are part of or which are rotating with the rotor
    • 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

Definitions

  • the invention relates to wind energy and is a construction of a very powerful rotor of a wind turbine designed for wind power plants.
  • Analogs of the invention are powerful wind turbines with an axis of rotation parallel to the wind flow, radially arranged blades with adjustable installation angles with a cross section in the form of an aerodynamic shape profile:
  • the initial wind speed (wind speed of turning on the generator), which is 3 - 4 m / s, the nominal wind speed (wind speed of the generator reaching its rated power) - 12 - 14 m / s, the maximum wind speed (wind speed of turning off the generator) - 21 - 30 m / s.
  • the difficulty is to significantly increase the size of existing rotors, because the cost of the turbine due to the increase in the weight of the blades and their cost will increase much more than the increase in added energy, and the aerodynamic quality will deteriorate.
  • Analog 2 is a multi-blade rotor with an axis of rotation parallel to the wind flow, radially arranged blades, the ends of which are movably connected to a strong outer ring.
  • the blades have the shape of a wing with high aerodynamic quality, the necessary twist and the ability to adjust the installation angle optimal for the corresponding wind speed, similar to analogues 1.
  • the outer ring has a cross section in the form of an aerodynamic shape profile (can be either symmetrical or asymmetric) with a chord parallel to the air flow .
  • the outer ring in order to simplify and reduce the cost of its manufacture, transportation and installation, consists of separately made and rigidly fastened segments during installation.
  • the outer ring is strengthened by spars, ribs and a strong shell or only a strong shell (without spars) in order to redistribute the wind load mainly from the blades to the outer ring.
  • This redistribution occurs due to the fact that the ring does not allow the blades to bend from strong winds, like the rim and spokes of a bicycle wheel.
  • the wind load on the blade does not bending force, and pulling. Due to the fact that tearing the blade is more difficult than breaking, it can be made thinner (the maximum relative thickness can be no more than 25 - 30%), significantly improving aerodynamic quality, and cheaper by reducing the shell thickness and using less expensive materials (for example, fiberglass instead of carbon fiber) even with a significant increase in wind speed.
  • An increase in the number of blades (ranging from 6 to 16, optimally 8 - 9) is necessary, firstly, to more evenly distribute the load on the outer ring, and secondly, to reduce the optimal peripheral speed of the blades, in order to reduce profile losses and increase Cp.
  • the number of blades is less than 6, the ring is loaded unevenly, which leads to the need to make it too strong and stiff, and therefore too heavy. This will add load to the blades instead of reducing it.
  • the number of blades over 16 will be superfluous, since the uniformity of the load on the ring is already sufficient.
  • the outer ring also eliminates inductive losses and stabilizes the blades (primarily, reduces the likelihood of flutter).
  • Analog 2 has much better characteristics and capabilities compared to traditional 3-bladed wind rotors. Aerodynamic calculations for a rotor with a diameter of 120 m, the number of blades equal to 8, an outer ring 1.5 m wide, 0.3 m thick and a nominal wind speed of 18 m / s show:
  • the optimal speed of movement of the ends of the blades is 74 m / s at a wind speed of 12 m / s and 94 m / s at a wind speed of 18 m / s.
  • the rated power was increased from 4.5 MW (for analogues 1 with a rotor diameter of 120 m) to 20 MW.
  • Maximum wind speed increased to 35 m / s.
  • the problems are solved by using at least one intermediate ring in the multi-vane rotor with the outer ring (analog 2), similar to the outer ring.
  • the intermediate rings divide the blades into external and internal parts, they have the appearance of a wing with high aerodynamic quality with a chord parallel to the air flow.
  • parallelism here and in the claims, as well as in analogue 2 we mean the type of construction, and not the exact value of parallelism (the actual inclination of the chords can be in the range of 0 - 20 degrees). It is assumed that for rotors with diameters of 150 - 240 m., One intermediate ring will be sufficient, for diameters of 250 - 300 m - two. All rings, as well as the outer ring of analogue 2, consist of separate segments connected during installation. For unification, they can be the same, and their number can be a multiple of the number of blades.
  • the transmission of torque to one shaft of the sleeve relative to the other shaft can be carried out, for example, by gear transmission either from an electric motor or by means of mechanical traction from a rotation device located in the central rotor sleeve.
  • the device for forced rotation of the outer part of the blade will further reduce the load on the outer ring and on the outer part of the blade due to the maximum load for the inner part of the blade at wind speeds above nominal, which is desirable due to the narrower and thinner parts of the blades.
  • it makes no sense to rotate the entire blade if it is enough to rotate only the narrow outer part.
  • the resulting uneven load on the blade will give a result only if there is an intermediate ring stabilizing the middle part of the blade.
  • the gap between the parts of the blades and the rings should not be large and should be in the range of 0.5 - 10 cm (optimally 1 - 2 cm).
  • the shafts of the fastening parts of the blades and rings must be hollow for the passage of a lightning rod connecting the metallized strip of the outer part of the outer ring to the central rotor hub, and the wires of the device for adjusting the installation angles of the outer part of the blade (if any).
  • the presence of an intermediate ring will not worsen the aerodynamic and improve the strength (and, therefore, weight and cost) qualities of the rotor with a diameter of more than 120 - 150 m, therefore, the above parameters and advantages of analogue 2 will be preserved for the rotor proposed in the invention.
  • FIG. 1 shows a general view of a rotor having 8 blades, an intermediate and an outer ring.
  • FIG. Figures 2 and 3 show a fragment of the rotor showing a variant of connecting the parts of the blade to each other and with the intermediate ring sleeve, in which the shafts of the parts of the blades are inserted one into the other and there is no separate adjustment of the installation angles of the outer part of the blade.
  • FIG. 1 shows a general view of a rotor having 8 blades, an intermediate and an outer ring.
  • FIG. Figures 2 and 3 show a fragment of the rotor showing a variant of connecting the parts of the blade to each other and with the intermediate ring sleeve, in which the shafts of the parts of the blades are inserted one into the other and there is no separate adjustment of the installation angles of the outer part of the blade.
  • FIG. 4 and 5 a fragment of the rotor is shown, showing a variant of connecting the shaft of the end of the outer part of the blade with the sleeve of the outer ring, in which the outer ring contains 2 spars of circular cross section and there is no device for turning the end of the blade.
  • FIG. 2 and 4 show a sectional connection in the plane of rotation of the rotor.
  • FIG. 3 and 5 show a connection in section perpendicular to the plane of rotation of the rotor.
  • bearing (must be closed type and designed for a long service life without additional lubrication); 9. a nut-clamp of an internal ring of the bearing;
  • the spar in the blade may be, may be absent or only at its end for rigid fixation in the blade of the shaft emerging from the end of the blade.
  • the drawings are shown for illustrative purposes only and as an option to prove its feasibility.
  • the internal parts of the blades are attached to the generator shaft sleeve mounted on the tower, as are the analogues 1. After that, the segments of the intermediate ring are alternately attached to the ends of the blades from the platform fixed to the tower or raised by a crane and fastened to each other, periodically turning to do this generator shaft. Then, the outer parts of the blades are attached to the finished intermediate ring and the inner parts of the blades. After that, the segments of the outer ring are likewise fastened and connected to each other.

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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

L'invention concerne un mode de réalisation du rotor d'une éolienne destinée aux centrales éoliennes de grande puissance. Le rotor possède un axe de rotation parallèle au flux aérien et est constitué de 6 à 16 pales montées radialement et possédant des anneaux intermédiaire et externe à angles de réglage modifiables. Les pales et les anneaux ont la forme d'une aile possédant une finesse élevée. Les extrémités des pales sont fixées aux anneaux de façon mobile pour permettre de modifier leur angle de réglage. Les anneaux absorbent une partie de la charge du vent subie par les pales; en outre, l'anneau externe permet d'éliminer les pertes aux extrémités des pales. L'invention permet d'obtenir un coefficient d'utilisation de l'énergie du vent de l'ordre de 60% dans une gamme de vitesses du vent entre 4 et 18 mètres à la seconde. Cela permet de multiplier la production d'énergie annuelle par 2 ou par 3 et d'augmenter le diamètre du rotor jusqu'à 300 mètres.
PCT/UA2009/000004 2008-03-20 2009-01-29 Rotor d'éolienne à pales multiples possédant un ou plusieurs anneaux intermédiaires de forme aérodynamique WO2009116961A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
UAA200803550A UA88976C2 (ru) 2008-03-20 2008-03-20 Многолопастный ротор ветродвигателя с внешним и промежуточным(и) кольцами аэродинамической формы
UAA200803550 2008-03-20

Publications (1)

Publication Number Publication Date
WO2009116961A1 true WO2009116961A1 (fr) 2009-09-24

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/UA2009/000004 WO2009116961A1 (fr) 2008-03-20 2009-01-29 Rotor d'éolienne à pales multiples possédant un ou plusieurs anneaux intermédiaires de forme aérodynamique

Country Status (2)

Country Link
UA (1) UA88976C2 (fr)
WO (1) WO2009116961A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100135809A1 (en) * 2007-04-05 2010-06-03 Hermann Olschnegger Wind wheel
CN102777331A (zh) * 2012-08-06 2012-11-14 国电联合动力技术有限公司 风力发电机组风轮直径的确定方法
EP3211224A4 (fr) * 2014-10-21 2018-06-20 Xiaoxin Zhang Hélices du type à bâti unique de turbine éolienne

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU159148A1 (fr) *
GB485072A (en) * 1936-09-04 1938-05-13 Beatty Bros Ltd Windmill sail support
RU1800142C (ru) * 1990-06-12 1993-03-07 В.И. Петинов Ветроколесо
RU2078990C1 (ru) * 1994-02-07 1997-05-10 Анатолий Трофимович Дибров Ветровая энергетическая установка
US6155785A (en) * 1999-04-15 2000-12-05 Rechnagel; Larry Support spoke for a windmill

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU159148A1 (fr) *
GB485072A (en) * 1936-09-04 1938-05-13 Beatty Bros Ltd Windmill sail support
RU1800142C (ru) * 1990-06-12 1993-03-07 В.И. Петинов Ветроколесо
RU2078990C1 (ru) * 1994-02-07 1997-05-10 Анатолий Трофимович Дибров Ветровая энергетическая установка
US6155785A (en) * 1999-04-15 2000-12-05 Rechnagel; Larry Support spoke for a windmill

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100135809A1 (en) * 2007-04-05 2010-06-03 Hermann Olschnegger Wind wheel
CN102777331A (zh) * 2012-08-06 2012-11-14 国电联合动力技术有限公司 风力发电机组风轮直径的确定方法
EP3211224A4 (fr) * 2014-10-21 2018-06-20 Xiaoxin Zhang Hélices du type à bâti unique de turbine éolienne

Also Published As

Publication number Publication date
UA88976C2 (ru) 2009-12-10

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