TECHNICAL FIELD OF THE INVENTION :
The present invention is a significant evolution of the windturbine's
concept. A windturbine is using the energy of the wind thanks to a
moving mechanism actuated by the natural flow of air ; this mechanism
is build with at least to identical and balanced
blades which are mounted on a rotary axis which is parallel to the
flowing direction of the air, this is the orientation of these blades
as an helix which is entailing the rotation. The rotary axis is usually
stationary maintained and situated in an horizontal position parallel
to the ground and orthogonal to the rotary plane of the helix. The best
power is achieved by modifying the values of 2 main parameters : the
orientation of the blades and the pursuit of the direction of wind for
the mechanism.
GENERAL DESCRIPTION OF
THE INVENTION :
Unlike the windturbine and the other existing machines which are
powered by natural flows, the moving part gets an elementary flow which
is hitting a double plane with 2 linked rotations according to 2
simultaneous rotary motions : the rotation of a twin-blades / couple of
blades (BPA) in a first plane which is
perpendicular to its rotary axis (AXR), and the rotation of
the rotary
axis of the twin-blades in a second plane which is perpendicular to the
first (fig 1
et 2). The rotation of the axis of the twin-blades (BPA) is
done
around its point of intersection with the rotary plane linked to the
couple of blades (fig 2 et 3). While rotating, the axis of the
twin-blades is turning around itself and guided by the gallows (POT).
The 2 blades are constituting the twin-blades and orthogonal the one to
the other, symetrically placed on both sides of their rotary axis.
These blades don't have an helical aspect, but defined with a profile
which preferably gets a constant area with two cutting symetric sides ;
the blades can notably be perfectly plane. Thus, the
rotations of the twin-blades are done around an axis whose position is
constantly changing during the rotary cycle of the gallows,
which is alternately putting against the wind one of the faces and one
of the cutting sides, then the other face and the other cutting side,
that for one and the other blade whose planes are always in
a relative
angular gap of 90° . The 2 imbricated rotations are
obtained by a set
of parts, gearings, chain and conical couple in cascade (CAS) which are
controlling the kinematics and the required relative simultaneous
motions. The rotary blades are piloting the rotation of the
axis of the
twin-blades - around itself - through the gallows and the set of
kinematical parts. One of the gearings of the conical couple is blocked
on the support of the machine. This new settlement allows the machine
to work with moving cycles which alternate each blade of the
twin-blades against the wind, then fleeing the wind, every quarter of
cycle, and reciprocally. Each blade is regularly moving while cutting
the wind then countering
the flows
(orthogonal) in the step of starting while facing the wind, and finally
from countering the wind towards cutting the wind in its step of
fleeing the wind (fig 1).
CHARACTERIZATION OF THE CONSTITUENT PARTS
Characterization
of the twin-blades (BPA) :
It is a monolithic set of two identical blades which are fixed
in a
balanced way on both sides of an axis of rotation : the surfaces of the
2 blades which constitute the twin-bladed (BPA) are orthogonal
one to
the other and mounted symmetrically on the both sides of their axis of
rotation (AXR).
Characterization
of the axis of rotation of the twin-bladed (AXR) :
It
is the axis that carries and guide the rotary twin-blades, it
also
receives the first gearing which controls the kinematic cascade (CAS).
It is geometrically constrained by a gallows.
Characterization
of the gallows (POT) :
It
is the rotating support which is giving the second coupled rotation of
the machine. It is piloted by the rotation of the twin-blades through
the kinematic cascade gearing / chain / conical couple. It can take a
simplified shape as mono arm in reversed L, or a stronger shape in
reversed U if the power to transmit is big. It must be both
mechanically strong and sufficiently perforated / shaped in order not
to become an obstacle for the flowing vein of fluid which feeds the
machine (fig 2 and 3).
Characterization of the
kinematic cascade (CAS) :
It is granting the rotation by quarter of round of the gallows for
every quarter of powering cycle of the twin-blades. The axes of these
two elements are perpendicular, thus we have to use at least a first
gearing which is mounted on the axis of the twin-blades, a second
gearing with the same number of teeth on a superior intermediate axis
(AIN), a chain to join the two gearings (ratio 1/1) and a final conical
couple (ratio 1/1) with return at 90°. One of the elements of
the final
conical couple is bound of the intermediate axis, the other is fixed on
the support of the machine, which is materialized by an axis of output
that guides the rotary motion of the gallows.
Characterization
of the machine's supporting part (SUP) :
This is the part which carries the gallows and guides it according to a
rotary motion. The second gearing of the conical couple is fixed on
this support and appears as the last element of the kinematic cascade
(CAS). This part is the main mechanical link of the machine to the
ground and notably allows to fix it on a pedestal.
PRINCIPLE OF WORKING :
A picture divides the cycle in 4 steps and allows to view the
successive positions of the constituent parts. This drawing illustrates
the complete sequence of a rotation and makes possible to understand
that when it is submitted to a flow of wind, this new machine has a
very perennial granted motion : the kinematic cascade (CAS) gives the
rotation by quarter of round of the gallows for every quarter of
powering cycle of the twin-blades (fig 2).
As a summary, the moving
twin-blades with 2 imbricated planes is fully working inside the vein
of fluid while delivering a strong average torque ; the twin-blades is
cyclically evolving
in the 3 dimensions of
the space. The range of useful windspeeds is
very wide and many natural situations can be accepted. There is no
deadpoint of power during the cycle.
The machine can also work
with a liquid flow, or in a reversible way as a compressor / fan
when its gallows is actuated in rotation by an external motor.
In each
case, the surfaces, measurements and materials of the constituent parts
must be thought again, proportioned, and adapted to the required
expectations.
On a cycle (a round of gallows), the average powering
surface of the twin-blades which is moving inside the flow (in
orthogonal equivalence) is identical to the surface of a blade. On a
cycle, the maximal swept surface by a asymmetrical twin-blades (as one "square" blade and the other "half moon
blade") is lower than 2 times the added front area of the 2 blades.
It is therefore more of the half of the swept surface by the
twin-blades that can be constantly active (orthogonal equivalence to
the flow). While using asymmetric blades, a dynamic balancing is
necessary. Thus the ratio of maximal compactness of this wind machine
can be higher than 50% (ratio between the active orthogonal surface and
the swept surface by the twin-blades on a cycle). Two working
prototypes / proof of concept have been build at the end of 2007 and
the beginning of 2008 years..
