This force can be used for propulsion and has the advantage of a high lift to drag ratio. In operation, a wind hitting vane 10 will rotate it about the axis running through the center of pin 18, the vane axis. Drag-driven turbines, such as the savonius, are relatively inefficient because the drag force aids forward motion only through half a cycle, but impede on the other half cycle. The blade’s interior may be hollow or solid but counterweight 26 should be made of denser material.
The blade of the wind-axis turbine radiates from the axis. The cross-wind-axis turbine has its axis of rotation, about which its blades revolve, perpendicular to the wind. Besides energy extraction, the blade and control mechanism can also be used as a propulsion device by, for example, push-pulling the control arms in a direction perpendicular to the vane axis. The advantage is that the bi-directional push-pulling produces a generally unidirectional, transverse (lifting) force, parallel to the control arm, and, at a low drag. 1 and 2 are perspective views of a basic version of the invention, attached to a turbine arm. By controlling pitch, drag and lift can be used to start a turbine rotating. For example, multiple blades can be hooked together, separated by their pitch and camber controls, by lengthening pins 18 and 24 to join succeeding blades, enabling each control and swing arm to be used by two blades.
Dolor Muscular En El Pecho
1-5 show my invention attached to an arm of a turbine. Though more abundant, the wind-axis turbine has several drawbacks that the cross-wind-axis turbine doesn’t have, one of which is the need to align its axis with the wind. The vane direction, therefore, is the negative of the net wind direction, or, the direction indicated by the blade velocity minus the wind velocity.
Thus the net wind is original wind velocity minus blade velocity. Dolor de espalda bioneuroemocion . FIG. 1 shows the vane at a zero pitch to the travel direction. Pitch is the angle the blade chord makes with some other direction, usually that of the wind, or the direction of blade motion. The cross-wind-axis blade, as in the cyclogiro, can be much simpler, without twist or chord changes, without sacrificing efficiency, and can be supported at both span ends. It thus is moving at different speeds along its span. Moving the control arm perpendicular to the desired travel direction, (and perpendicular to the blade span) gives rise to a force in the travel direction. The pitch and camber control mechanism comprises a control arm 16, hinged at one end to the vane 10 by pivot pin 18. Control arm 16 is pivotally connected, at its other end, to one end of swing arm 22 by pivot pin 20. Swing arm 22 is pivotally connected, at its other end, to deflector 12 by pivot pin 24. Control arm 16 is firmly attached to turbine arm 28 so that it always lies parallel to the direction of travel of the blade and the turbine arm.
A wind turbine blade would have to invert its camber, when the wind hitting it changed sides. The vane turns directly into the wind except when this would require a pitch greater than 90 degrees. At each position it should be obvious that the net force on the blade is in the forward direction except when the blade direction is directly into the wind. V. Direct and immediate pitching and cambering response–Only the immediately local wind is involved, and it directly and immediately changes the pitch and camber. The parallelogram linkage constrains deflector 12 to remain oriented parallel to control arm 16. Since control arm 16 is fixed parallel to the travel direction, deflector 12 always directs the flow in the best possible direction. Dolor parte posterior de la pierna . Optimally, besides the blade, only one additional part, the swing arm may be needed.
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The vane, as a wind vane, will tend to align with the wind. This rotational axis must align with the wind for energy production, thus the term wind-axis. Usually a central sensor measures wind direction and/or speed, a power amplifier amplifies the sensor’s information, and actuates gears, cams or linkages to pivot, or pitch, the vanes. Third, energy is required to run the power amplifier.