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
  • F03D7/0236—Adjusting aerodynamic properties of the blades by changing the active surface of the wind engaging parts, e.g. reefing or furling
• • 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
  • F05B2260/00—Function
  • F05B2260/70—Adjusting of angle of incidence or attack of rotating blades
  • F05B2260/74—Adjusting of angle of incidence or attack of rotating blades by turning around an axis perpendicular the rotor centre line
• • 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
  • F05B2260/00—Function
  • F05B2260/70—Adjusting of angle of incidence or attack of rotating blades
  • F05B2260/75—Adjusting of angle of incidence or attack of rotating blades the adjusting mechanism not using auxiliary power sources, e.g. servos
• • 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
  • F05B2260/00—Function
  • F05B2260/70—Adjusting of angle of incidence or attack of rotating blades
  • F05B2260/77—Adjusting of angle of incidence or attack of rotating blades the adjusting mechanism driven or triggered by centrifugal forces
• • 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

• This invention relates to a device at a wind propeller the blades of which are permanently connected to a rotatably mounted hub.
• the object of the present invention is to achieve a wind propeller of introductory said type where the area of action successively decreases at an increasing wind velocity and this is made possible in that the blades of the propeller have a radially displaceable disc which under the influence of a springing means working between the disc and the blade or the hub is kept in a first position relative to the hub as long as the wind propeller remains motionless or rotates slowly but at an increasing rotary speed is successively displaced radially outwards from the hub to a second position relative to the hub by the centrifugal force counteracted by the springing means and that the blade as well as the disc belonging to it has one or more through-openings equally dispersed over the blade and the disc so that when the disc is in the first said position it covers the opening or the openings in the blade and vice versa, that is to say the blade and the disc create a complete area of action for the wind and so that when the disc moves towards the second position caused by an increased wind velocity, said opening or openings in the blade and the disc increasingly coincide
• fig 1 schematically shows an embodiment of a wind propeller according to the invention at a low wind velocity.
• Fig 2 shows the propeller according to fig 1 at a high wind velocity.
• FIG. 1 relates to a blade of a wind propeller.
• the blade is permanently connected to a rotatably mounted hub 2 together with the other blades of the propeller.
• a radially displaceable disc 3 is arranged at the front or the back of the blade.
• the disc is connected to the hub 2 or the area of the blade 1 nearest to the hub via a springing means 4, in the simplest adaption a spiral spring.
• the task of the springing means 4 is to keep the disc in a first position fig 1, as long as the wind propeller remains motionless or rotates slowly.
• the disc 3 is successively displaced outwardly from the hub 2, working against the springing means 4, until the disc has reached a second position, fig 2.
• the blade 1 as well as the disc 3 has one or more through openings 5 and 6 respectively, in the drawing eight openings. These are equally dispersed both on the blade 1 and the disc 3.
• the openings are displaced relative to each other so that the openings 6 in the disc 3 are covered by the blade 1 and the openings 5 in this are covered by the disc 3.
• the blade 1 and the disc 3 form a complete area of action for the wind.
• the rotary speed of the wind propeller is kept constant in a simple way when the wind velocity varies within certain limits.

Landscapes

• Engineering & Computer Science (AREA)
• Physics & Mathematics (AREA)
• Fluid Mechanics (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)
• Wind Motors (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=20348705

Family Applications (1)

Country Status (6)

Families Citing this family (7)

Family Cites Families (1)

• 1982
  • 1982-11-23 SE SE8206660A patent/SE436513B/sv not_active IP Right Cessation
• 1983
  • 1983-11-02 DE DE19833390366 patent/DE3390366T1/de not_active Withdrawn
  • 1983-11-02 WO PCT/SE1983/000378 patent/WO1984002163A1/en not_active Ceased
  • 1983-11-02 NL NL8320348A patent/NL8320348A/nl unknown
  • 1983-11-02 EP EP83903607A patent/EP0126114A1/de not_active Withdrawn
• 1984
  • 1984-06-20 DK DK302284A patent/DK302284A/da not_active Application Discontinuation

Non-Patent Citations (1)

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