GB1231581A - - Google Patents

Info

Publication number
GB1231581A
GB1231581A GB395467A GB1231581DA GB1231581A GB 1231581 A GB1231581 A GB 1231581A GB 395467 A GB395467 A GB 395467A GB 1231581D A GB1231581D A GB 1231581DA GB 1231581 A GB1231581 A GB 1231581A
Authority
GB
United Kingdom
Prior art keywords
blade
rotor
flow
concavity
windmill
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
GB395467A
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 filed Critical
Publication of GB1231581A publication Critical patent/GB1231581A/en
Expired legal-status Critical Current

Links

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
    • 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
    • F05B2210/00—Working fluid
    • F05B2210/16—Air or water being indistinctly used as working fluid, i.e. the machine can work equally with air or water without any modification
    • 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
    • F05B2260/78—Adjusting of angle of incidence or attack of rotating blades the adjusting mechanism driven or triggered by aerodynamic 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

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)

Abstract

1,231,581. Turbines and wind motors. G.B. BATHURST. April 26, 1968 [Jan.26, 1967], No.3954/67. Heading F1T. A rotor operated by fluid flowing therepast comprises a shaft 2 carrying at least two rigid spars 7 each supporting a blade 1 towards the leading edge of the latter, the blade being of flexible material. When there is no flow therepast each blade 1 is flat or of aerofoil section and may have substantially zero angle of pitch relative to the plane of rotation of the rotor. As the flow increases each blade 1 flexes such that the pitch angle increases and an increasing concavity 3 is formed on the downstream surface 4 of the blade. Vortices 5 formed within the concavity 3 generate suction forces which attract the adjacent flow 6 tending to promote more nearly laminar flow and increasing efficiency. When used in a windmill the power output of such a rotor varies substantially directly with the windspeed. The rotor may be used in a vertical windmill, Figs.4, 5 (not shown) and also described in Specification 1, 231, 582. It can also be used to derive power from tidal or wave motions in water.
GB395467A 1967-01-26 1967-01-26 Expired GB1231581A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB395467 1967-01-26

Publications (1)

Publication Number Publication Date
GB1231581A true GB1231581A (en) 1971-05-12

Family

ID=9768025

Family Applications (1)

Application Number Title Priority Date Filing Date
GB395467A Expired GB1231581A (en) 1967-01-26 1967-01-26

Country Status (1)

Country Link
GB (1) GB1231581A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4031173A (en) * 1976-03-25 1977-06-21 Paul Rogers Efficiency and utilization of cooling towers
US4309146A (en) * 1980-03-12 1982-01-05 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Amplified wind turbine apparatus
GB2237330B (en) * 1989-10-07 1994-08-24 John Nicoll Vannan Semi flexible vane and fluid machine incorporating a plurality of such vanes
GB2317927A (en) * 1996-10-04 1998-04-08 Braun Ag Impeller for a hair dryer or accessory
GB2453991A (en) * 2007-10-24 2009-04-29 Philip Douglas Lord Uni-directional turbine
CN109723613A (en) * 2019-01-31 2019-05-07 大冶特殊钢股份有限公司 A kind of asymmetric special-shaped ring of large size for wind power equipment and preparation method

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4031173A (en) * 1976-03-25 1977-06-21 Paul Rogers Efficiency and utilization of cooling towers
US4309146A (en) * 1980-03-12 1982-01-05 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Amplified wind turbine apparatus
GB2237330B (en) * 1989-10-07 1994-08-24 John Nicoll Vannan Semi flexible vane and fluid machine incorporating a plurality of such vanes
GB2317927A (en) * 1996-10-04 1998-04-08 Braun Ag Impeller for a hair dryer or accessory
US6041514A (en) * 1996-10-04 2000-03-28 Braun Gmbh Impeller for a hair dryer
GB2317927B (en) * 1996-10-04 2000-08-09 Braun Ag Turbine driven pulsator for a hair dryer or hair dryer accessory
GB2453991A (en) * 2007-10-24 2009-04-29 Philip Douglas Lord Uni-directional turbine
CN109723613A (en) * 2019-01-31 2019-05-07 大冶特殊钢股份有限公司 A kind of asymmetric special-shaped ring of large size for wind power equipment and preparation method
CN109723613B (en) * 2019-01-31 2024-01-16 大冶特殊钢有限公司 Large-scale asymmetric special-shaped ring piece for wind power equipment and preparation method

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees