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
  • 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
  • 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
  • F03D7/0204—Controlling wind motors  the wind motors having rotation axis substantially parallel to the air flow entering the rotor for orientation in relation to wind direction
• • 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
  • F05B2240/10—Stators
  • F05B2240/13—Stators to collect or cause flow towards or away from turbines
• • 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 present invention relates to a wind turbine mounted freely pivoting about a vertical axis of rotation so as to allow its natural self-orientation facing the wind and comprising a propeller actuated by the wind and cooperating with a alternator to supply electrical energy.
• Such propellers conventionally cooperate with dynamos or industrial alternators equipped with speed multiplier drives, which makes them heavy, expensive, and of low efficiency.
• the oblique blades are longer than radial blades of the same working diameter and are active over their entire length. without aerodynamic end loss, which again increases efficiency.
• This wind turbine has proven to be more robust, less bulky at equal power and less noisy than conventional wind turbines.
• This fairing in fact makes it possible to suppress the turbulence at the origin of the noise and to create, in cooperation with the hub, a diverging convergent diffuser assembly making it possible to obtain optimal conditions for acceleration of the air flow in its most section. close and therefore the optimal rotation of the blades.
• These bodies are, for example, constituted by “yaw” motors which make it possible to orient the wind turbine according to the wind, by “yaw sensor” which indicate the direction of rotation of the wind turbine as well as by devices for adapted management.
• the object of the present invention is to provide a self-rotating wind turbine which overcomes this difficulty.
• To design such a wind turbine we had the idea of using the fairing as a fin.
• Such a self-rotating wind turbine according to the invention can thus be of any type, and have a small, medium or a large span provided that it is equipped with a divergent fairing.
• this wind turbine is pivotally mounted about a vertical axis of rotation so as to allow its orientation facing the wind and comprises a propeller actuated by the wind, which is equipped with blades carried by a hub with a horizontal axis as well as 'an alternator cooperating with the propeller to supply electrical energy, and a diverging circular fairing of relatively short length mounted concentrically with the hub and surrounding the blades.
• This wind turbine is characterized in that its axis of rotation is located upstream of the focus of the resulting aerodynamic forces generated on the fairing by an axial wind, in the direction of this wind.
• Such a self-orienting wind turbine can however have the drawback of risking getting carried away when the wind power is too great, thus endangering the various elements of its structure.
• this difficulty has been overcome by adding to the hub of the wind turbine members making it possible to modify the orientation of the blades relative to the wind.
• the blades can thus be "erased” from the wind in the presence of strong wind.
• FIG. 1 is a schematic section of a wind turbine according to the invention by a vertical plane
• FIG. 2 is a schematic section of a wind turbine according to the invention oriented facing the wind V by the horizontal median plane of the fairing;
• FIG. 3 is a schematic section corresponding to Figure 2, but in which the wind turbine is oriented obliquely to the wind V.
• the wind turbine is equipped with a hub 10 with a horizontal axis xx 'equipped with blades 1 1 as well as an alternator 12 and a divergent circular fairing 1 mounted concentrically with the hub 10 via of support arms 13 and surrounding the blades 11.
• This wind turbine is pivotally mounted on a vertical mast 2 shown diagrammatically by a circle in FIGS. 2 and 3 by means of a pivot 14.
• the fairing 1 has a particular aerodynamic profile defined by a rounded leading edge 3 followed by an upper / lower surface 4 and diverging trailing edges 5.
• the internal cord C has a relatively short length whereas the mean radius R essentially corresponds to the length of the blades 11.
• the angle of the cord C and the axis x-x 'of the fairing 1 is from 5 to 30 °.
• the set of aerodynamic forces Frtotal generated by the wind V can be summed up in two forces, namely a resultant Frd on the right side of the fairing 1 and a resultant Frg on the left side of the fairing 1.
• the angle of incidence of the wind V on the right chord C is equal to the angle of incidence of the wind on the left chord C and therefore the resultant Frd is equal to the resultant Frg.
• the focal point Fc of these two forces is located at a distance d from the axis of rotation 2 of the wind turbine, behind this axis.
• such a configuration therefore allows, in fact, to use the fairing as a drift so as to allow self-orientation of the wind turbine, facing the wind.
• the distance d between the focal point Fc and the axis of rotation 2 of the wind turbine and consequently the position of this axis of rotation play an essential role in the temporal dynamics of the system: in fact, the greater the distance d is large, the shorter the response time to variations in wind direction.
• Various factors must however be taken into account when choosing the position of the axis of rotation 2 of the wind turbine, in particular:

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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)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (2)

Family

ID=33427410

Family Applications (1)

Country Status (5)

Cited By (12)

Families Citing this family (1)

Citations (6)

• 2003
  • 2003-04-30 FR FR0305340A patent/FR2857062A1/fr active Pending
• 2004
  • 2004-04-30 CA CA002523420A patent/CA2523420A1/fr not_active Abandoned
  • 2004-04-30 WO PCT/FR2004/001050 patent/WO2004099607A2/fr not_active Application Discontinuation
  • 2004-04-30 EP EP04742616A patent/EP1618300A2/de not_active Withdrawn
  • 2004-04-30 CN CNA2004800116426A patent/CN1780985A/zh active Pending

Patent Citations (6)

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