| 摘要 |
A wind-powered turbine has vanes (2-5;36-39) that are pivoted (13;44) to radial arms (6;41) of its rotor (1;30,31) and are turned by rods (14;45) linking the vanes (2-5;36-39) individually to a common pivot (16;47) which is offset from the rotor-axis (8;42) on a crank-arm (17;48). The rods (14;45) constrain their pivots (15;46) with the vanes (2-5;36-39), to follow a circular path (B) centred on their common pivot (16;47) on the crank-arm (17;48) so that vane-pitch varies cyclically with rotor-rotation. Angular adjustment of the crank-arm (17;48) about the rotor-axis (8;42) varies the angular phasing of the pitch cycle within each revolution such that for constant wind speed and direction (W), rotor-speed changes. Where the rotor-axis (8) is vertical, maximum output torque is maintained by turning the crank-arm (17) in response to change of wind-direction sensed by a sensor-vane (21), and the rods (14) include hydraulic rams (23) for varying rod-lengths in feathering the vanes (2-5) into edge-on alignment with the wind when an anemometer (26) senses high-wind conditions. Where the rotor-axis (42) is horizontal, two rotors (30,31) are mounted at opposite ends of a boom (32) that is turned across the wind according to wind-direction sensed by a vane (62), and in high-wind conditions sensed by an anemometer (63) is turned into alignment with the wind.
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