According to the invention, there is provided an oscillating wing power generator for converting wind or water flow into electrical or mechanical energy, the generator comprising: an oscillating frame arrangement that is pivotally mountable to a support base at a first pivot point; and a wing pivotally fitted to the frame arrangement at a second pivot point, the second pivot point being spaced apart from the first pivot point, with the wing, in the presence of wind or water flow, being arranged to exert an aerodynamic force on the frame arrangement so as to move an end of the frame arrangement, in proximity to the second pivot point, between an upper and lower position relative to the support base, wherein a connecting rod can be fitted to the oscillating frame arrangement to produce, either directly or indirectly, mechanical or electrical energy, respectively. In a second version, the connecting rod may be fitted to a crankshaft to translate the linear motion of the connecting rod, under the influence of the oscillating frame arrangement, into a rotational motion.
Dolores Musculares Causas
In the first embodiment, a flywheel (not shown) is provided to carry the wing 1 8 through the neutral point/position during oscillation. The wing may include sensors which indicate when the first end of the wing has reached the first and the second position. In a second example of the articulated wing version, the wing is fitted with two articulated flaps, with the adjustment means being arranged to control the angles of the two flaps relative to the wing. The oscillating wing power generator of the present invention, in general, may be arranged in any one of a number of different configurations utilizing the basic mechanism described above, based on the number of oscillating wings employed. In a first version, the connecting rod 24, under the influence of the oscillating frame arrangement 12, provides a substantially linear motion, which can be used directly to perform mechanical work (i.e.
Wind energy is a renewable clean energy source which provides an alternative to fossil fuels, is widely distributed, available in abundance, requires little land and does not create greenhouse gas emissions. In this version, the crankshaft 26 provides the primary power output of the generator 10. The crankshaft 26 may be housed within a protective box 28, which may in turn be secured to the support base 14 with a securing beam 30. Conveniently, the angle of incidence of the wing 18 changes at the extremity of each upward or downward movement to reverse the direction of the aerodynamic force exerted on it by the flow of wind (or water) over the wing 18, so as to exert an upward force on the frame arrangement 12 during its upward motion and a downward force during its downward motion.
In an embodiment, the angle of incidence of the wing is changed at the extremity of each upward or downward movement to reverse the direction of the aerodynamic force exerted on it by the flow of wind or water over the wing, so as to exert an upward force on the frame arrangement during its upward motion and a downward force during its downward motion. In this third embodiment, the two oscillating frames are connected to a common crankshaft approximately 90 degrees out of phase, which ensures that when any one wing pair passes through the zero-lift point the other wing pair is at the maximum lift point of its cycle. In this second embodiment, the angle of incidence of the rear wing is approximately 180 degrees out of phase with that of the front wing, so that both wings contribute to the oscillation movement of the attachment frame in phase.
In an embodiment, the frame arrangement 12 comprises a pair of spaced apart arms 32 pivotally fitted to a pair of spaced apart support base members 34, with a pair of spaced apart first pivot points 1 6. The wing 1 8 is pivotally fitted between the ends of the arms 32 with a pair of spaced apart second pivot points 20. In particular, the wing 18 is mounted to the pair of spaced apart arms 32 of the oscillating frame 12 through a lateral shaft 36 at the aerodynamic centre of the wing 18, which is at approximately 25% of the wing chord, corresponding to the second pivot point 20, about which it can rotate.
- Correlative technology field summary
- A plurality of blades mounted on the elongate support along its length, and
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In an embodiment, the wing is mounted to the pair of spaced apart arms of the oscillating frame through a lateral shaft at the aerodynamic centre of the wing, which is at approximately 25% of the wing chord, about which it can rotate. In an embodiment, the frame arrangement comprises a pair of spaced apart arms pivotally fitted to a pair of spaced apart support base members with a pair of spaced apart first pivot points, with the wing being pivotally fitted between the ends of the arms with a pair of spaced apart second pivot points. The second smaller flap may alternatively be used to unload the aft part of the wing 1 8 to counter the pitching moment developed by the wing 18 and to smooth the airflow in the wake of the wing 18. This may be beneficial to the single and/or stacked tandem wing configuration, which will be described further below, in which rear wing operates in the wake of a front wing, and also to the entire assembly when it operates in an aerodynamic duct, which feature will also be described in more detail further below.