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US 4,201,514 AGranted
Wind turbine
OwnerUlrich Huetterinventor
Life of this patent
Estimating the term…
Abstract
A wind turbine having a wing rotor with two rotor blades supported on a hub; to accommodate different wind velocities nearer and further from the ground and to accommodate the components of wind force transverse to the rotor blade plane of rotation, the pitch of the blade that is then higher above the ground is altered with respect to the pitch of the blade that is nearer to the ground; this can be done by appropriate swivel mounting of the rotor hub for allowing its reorientation to change the effective pitch of the blades as they rotate high and low; or it can be done by a blade swiveling means sensitive to wind conditions.
Claims36
A wind turbine, including an axial flow through wing rotor;
- said rotor comprising a rotor hub and at least one wing blade having a pitch with respect to the wind flow so as to be adapted to rotate with said hub in the wind flow, said wing blade being supported by said hub and projecting therefrom;
- a rotor shaft;
- said hub being supported on said rotor shaft and being connected thereto such that rotation of said rotor rotates said rotor shaft;
- a bearing seat for carrying said rotor shaft for rotation in said bearing seat;
- said seat being rotatable around an axis which extends substantially vertically for turning said rotor into the wind;
- each said wing blade being inclined relative to the general plane of rotation of said rotor;
- means for enabling said rotor, which is comprised of said hub and said wing blade, to deflect under the effect of a transverse force acting on said rotor across the wind direction, which transverse force is the resultant of various wind velocities at various regions of the plane of revolution of said rotor, and said deflection of said rotor initiating a reduction of the transverse force acting on said rotor.
4 more elements
A wind turbine, including an axial flow through winged rotor;
- said rotor comprising a rotor hub and at least one wing blade having a pitch with respect to the wind flow so as to be adapted to rotate with said hub in the wind flow;
- said wind blade being supported by said hub and projecting therefrom;
- a rotor shaft having a rotation axis;
- said hub being supported on said rotor shaft and being connected thereto such that rotation of said rotor, including said hub thereof, rotates said rotor shaft;
- said connection of said hub with said rotor shaft being a free swivel connection for enabling said rotor to swivel with respect to said rotor shaft;
- said wing blade being inclined to the general plane of rotation of said rotor;
- said wing blade having a center of gravity thereof out along said wing blade from said hub;
- a swivel axis for said wing blade passing through said swivel connection and through said center of gravity of said wing blade as said wing blade crosses said swivel axis, and said swivel axis intersecting said rotation axis of said rotor shaft;
- said wing blade being shaped and having a respective said pitch and being positioned with respect to said hub and said swivel axis such that the wind flow in the wind direction applies force to said wing blade at a resultant location that is a further distance along said wing blade than said center of gravity;
- said hub being swivelable about said swivel axis and with respect to said rotor shaft so as to enable said rotor to deflect about said swivel axis under the effect of a transverse force acting upon said rotor at said resultant location and across the wind direction, which transverse force is the resultant of various wind velocities at various regions of the plane of rotation of said rotor, and said deflection of said rotor initiates a pitch variation of said wing blade with respect to the wind flow and said pitch variation occurs around each revolution of said rotor, and said pitch variation reduces the transverse force acting upon said rotor at said resultant location on said wing blade;
- and
- a bearing seat for carrying said rotor shaft for rotation in said bearing seat;
- said bearing seat being rotatable around an axis which extends substantially vertical for enabling turning of said rotor into the wind.
10 more elements
A wind turbine, including an axial flow through winged rotor;
- said rotor comprising a rotor hub and at least two wing blades spaced apart around said hub being supported by said hub and projecting therefrom;
- each said wing blade having a pitch with respect to the wind flow so as to be adapted to rotate with said hub in the wind flow;
- a rotor shaft having a rotation axis;
- said hub being supported on said rotor shaft and being connected thereto such that rotation of said rotor, including said hub thereof, rotates said rotor shaft;
- said connection of said hub with said rotor shaft being a free swivel connection for enabling said rotor to swivel with respect to said rotor shaft;
- said wing blades each being inclined in the same direction to the general plane of rotation of said rotor;
- each said wing blade having a center of gravity out along said wing blade from said hub;
- a swivel axis for all said wing blades and passing through said swivel connection and passing through said center of gravity of each said wing blade as said wing blade crosses said swivel axis, and said swivel axis intersecting said rotation axis of said rotor shaft;
- said wing blades being shaped and having a respective said pitch and being positioned with respect to said hub and said swivel axis such that the wind flow in the wind direction applies force to each said wing blade at a resultant location therealong that is a further distance along the said wing blade than its respective center of gravity;
- said hub being swivelable about said swivel axis and with respect to said rotor shaft so as to enable said rotor to deflect about said swivel axis under the effect of a transverse force acting upon said rotor at said resultant locations and across the wind direction, which transverse force is the resultant of various wind velocities at various regions of the plane of rotation of said rotor, and said deflection of said rotor initiates a pitch variation of said wing blades with respect to the wind flow and said pitch variation of each said wing blade occurs around each revolution of said rotor, and said pitch variation reduces the transverse force acting upon said rotor at said resultant locations on said wing blades;
- and
- a bearing seat for carrying said rotor shaft for rotation in said bearing seat;
- said bearing seat being rotatable around an axis which extends substantially vertical for enabling turning of said rotor into the wind.
10 more elements
Dependencies are inferred from the claim text.