초록

A windmill with a vertical-axis rotor having thrust vanes which is surrounded by a stationary cage having guide vanes to channel the windstream to the rotor. In the preferred embodiment the rotor is a flow-through type with airfoil vanes.

대표청구항 ▼

A windmill comprising, a rotor having a vertical rotary axis mounted for rotation on an output shaft and a plurality of alike upright thrust vanes equally spaced apart circumferentially of said rotary axis, said thrust vanes each having an airfoil section with a nose, tail edge, leading face, and tr

A windmill comprising, a rotor having a vertical rotary axis mounted for rotation on an output shaft and a plurality of alike upright thrust vanes equally spaced apart circumferentially of said rotary axis, said thrust vanes each having an airfoil section with a nose, tail edge, leading face, and trailing lift face, and having its chord generally radial and its nose facing radially outward with respect to said rotary axis, whereby a rotor turning thrust is exerted on the lift face of those thrust vanes exposed to an incoming flow of air passing over the leading face and the trailing lift face thereof as a consequence primarily of the lift effect of the airfoil section, said rotor being open inwardly of the tail edge of the thrust vanes for air flow through the rotor, and a stationary guide cage surrounding said rotor having a plurality of alike upright guide vanes equally spaced apart circumferentially of said rotary axis and arranged to direct the air in a wind front between the exposed guide vanes in a predominantly radial direction with a relatively small tangential component giving a vortex effect in the rotational direction of the rotor, the inner edges of said thrust vanes being located close to the circular travel path of the nose of the thrust vanes.