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US 6,856,042 B1Granted
Wind turbine generator
OwnerHisaomi Kubotainventor
Life of this patent
Estimating the term…
Abstract
Disclosed is a wind turbine generator, which effectively uses wind velocity while generating a minimum of noise. Two blade assemblies, which are subjected to natural wind velocity to rotate for driving a power generator, are coaxially mounted one behind the other. When the front end and rear blade assemblies in this configuration both catch a wind to rotate, the rear blade assembly rotates as it catches not only the wind that comes from the front and is rectified by the front blade assembly, but also a wind that is generated by the front blade assembly, which is rotating. This enables the rear blade assembly to rotate with high efficiency and continuously rotate even when the wind velocity is low.
Claims18
A wind turbine generator, comprising:
- a power generator;
- a first blade assembly for being subjected to natural wind velocity to rotate and driving said power generator;
- and
- a second blade assembly that is positioned behind said first blade assembly to overlap with said first blade assembly and subjected to the natural wind velocity to rotate for driving said power generator;
- and
- clutching means that are positioned between said first blade assembly/said second blade assembly and said power generator to disengage said power generator from said first blade assembly and/or said second blade assembly to reduce a rotary load on said power generator when said first blade assembly and said second blade assembly are loaded.
3 more elements
A wind turbine generator, comprising:
- a power generator;
- first rotation axis means;
- second rotation axis means that are substantially coaxial with said first rotation axis means;
- a first blade assembly that is mounted on said first rotation axis means in a rotatable manner and subjected to natural wind velocity to rotate;
- a second blade assembly that is positioned behind said first blade assembly to overlap with said first blade assembly, mounted on said second rotation axis means so as to rotate together as one piece, and subjected to natural wind velocity to rotate;
- first blade assembly power transmission means that are provided with intermediate clutching means for power transmission interruption and positioned between said first rotation axis means and said power generator;
- second blade assembly power transmission means that are provided with intermediate clutching means for power transmission interruption and positioned between said second rotation axis means and said power generator,
- wherein each of said clutching means are configured as a one-way clutch that invokes clutching when corresponding said blade assembly is about to rotate faster than corresponding said power generator.
5 more elements
A wind turbine generator, comprising:
- a power generator;
- first rotation axis means;
- second rotation axis means that are substantially coaxial with said first rotation axis means;
- a first blade assembly that is mounted on said first rotation axis means in a rotatable manner an subjected to natural wind velocity to rotate;
- a second blade assembly that is positioned behind said first blade assembly to overlap with said first blade assembly, mounted on said second rotation axis means so as to rotate together as one piece, and subjected to the natural wind velocity to rotate;
- first blade assembly power transmission means that are positioned between said first rotation axis means and said power generator;
- second blade assembly power transmission means that are positioned between said second rotation axis means and said power generator;
- and
- one-way clutching means that are positioned between said first rotation axis means and said second rotation axis means to invoke clutching when said second ration axis means are about to rotate faster than said first rotation axis means.
6 more elements
A wind turbine generator, comprising:
- a power generator;
- first rotation axis means;
- second rotation axis means that are substantially coaxial with said first rotation axis means;
- a first blade assembly that is mounted on said first rotation axis means in a rotatable manner and subjected to natural wind velocity to rotate;
- a second blade assembly that is positioned behind said first blade assembly to overlap with said first blade assembly, mounted on said second rotation axis means so as to rotate together as one piece, and subjected to the natural wind velocity to rotate;
- power transmission means that are positioned between said second rotation axis means and said power generator;
- and
- one-way clutching means that are positioned between said first rotation axis means and said second rotation axis means to invoke clutching when said second rotation axis means are about to rotate faster than said first rotation axis means.
5 more elements
A wind turbine generator, comprising:
- a power generator;
- first rotation axis means;
- second rotation axis means that are substantially coaxial with said first rotation axis means;
- a first blade assembly that is mounted on said first rotation axis means in a rotatable manner and subjected to natural wind velocity to rotate;
- a second blade assembly that is positioned behind said first blade assembly to overlap with said first blade assembly, mounted on said second rotation axis means so as to rotate together as one piece, and subjected to the natural wind velocity to rotate;
- power transmission means that are positioned between said first rotation axis means and said power generator;
- and
- one-way clutching means that are positioned between said first rotation axis means and said second rotation axis means to invoke clutching when said second rotation axis means are about to rotate faster than said first rotation axis means.
5 more elements
A wind turbine generator comprising:
- a plurality of coaxial blade assemblies including a first blade assembly and a second blade assembly mounted on one axis and overlapping in a front-to-rear direction to be subjected to natural wind velocity to rotate for driving a power generator, with a specified angular difference being maintained between the blades of said blade assemblies in accordance with a front-rear distance between said blade assemblies to prevent the blades of said blade assemblies from coinciding with each other in a direction of rotation;
- and
- a rotary angle adjustment mechanism is provided between said first blade assembly and said second blade assembly to change a rotary angle of a blade assembly relative to said axis in accordance with a newly reached position when at least one of said first blade assembly and said second blade assembly changes its front-rear position over said axis.
A wind turbine generator, comprising:
- a power generator;
- a first blade assembly that is subjected to natural wind velocity to rotate for driving said power generator;
- a second blade assembly that is positioned behind said first blade assembly to overlap with said first blade assembly, and subjected to the natural wind velocity to rotate for driving said power generator;
- clutching means that are positioned between said first blade assembly/said second blade assembly and said power generator to disengage said power generator from said first blade assembly and/or said second blade assembly to reduce a rotary loan on said power generator when said first blade assembly and said second blade assembly are loaded;
- and
- a lock bearing that is positioned between said first blade assembly and said second blade assembly to maintain relative rotary positions of the blades of said first blade assembly and the blades of said second blade assembly within a predetermined angular range.
3 more elements
Dependencies are inferred from the claim text.