초록 ▼

A high speed, downwind horizontal axis wind turbine includes three circumferentially spaced lightweight blades having inner support arms and radially outwardly disposed airfoil configured blade segments which are pivotally connected to the support arms, so as to fold straight downwind under high win

A high speed, downwind horizontal axis wind turbine includes three circumferentially spaced lightweight blades having inner support arms and radially outwardly disposed airfoil configured blade segments which are pivotally connected to the support arms, so as to fold straight downwind under high wind conditions or high rotating speeds. A spring biased control mechanism serves to rotate the airfoil segment of each blade about its longitudinal axis as the blade is folded downwind, so that a simultaneous folding and feathering action is obtained to prevent damage to the turbine in high wind conditions or under high rotating speeds.

대표청구항 ▼

A wind turbine device having a main rotatable driven shaft, a plurality of elongated blades operatively mounted on said main shaft for unitary rotation with the main shaft, said blade extending substantially radially away from said main shaft and adpated to fold downwind under naturally occurring fo

A wind turbine device having a main rotatable driven shaft, a plurality of elongated blades operatively mounted on said main shaft for unitary rotation with the main shaft, said blade extending substantially radially away from said main shaft and adpated to fold downwind under naturally occurring forces and simultaneously feather in direct response to the folding movement, and means associated with the blades for increasing the rate of fold relative to the rate of feather as the speed of rotation increases.