Fluid reaction surfaces (i.e. – impellers) – With means positioning fluid current driven impeller... – Feathering cycle related to flow direction
Patent
1981-02-20
1984-04-10
Hornsby, Harvey C.
Fluid reaction surfaces (i.e., impellers)
With means positioning fluid current driven impeller...
Feathering cycle related to flow direction
416 24, F03D 306
Patent
active
044418582
ABSTRACT:
This invention relates to a device converting the kinetic energy belonging to the moving stream of the fluid such as the wind, river and gulf streams to the power capable of doing a useful work in the form of a rotational motion with torque. Said device comprises two or more blades revolving about the central axis, which blades are made to rotate about its own axis parallel to the central axis at an angular velocity equal to one half of that of the revolving motion of the blades about the central axis. A pair of flaps are pivotably disposed at both edges of each of the blades, the deflection of which flaps is linked to the rotational motion of the blades that is in turn linked to the revolving motion of the blades in such a way that the blade and flaps line up to the direction of the fluid motion at the minimum drag position in the revolving motion while said combination takes up a position of the maximum drag position, which is a line up perpendicular to the direction of the fluid motion, at another position in the revolving motion of the blade diametrically opposite to the minimum drag position. The flaps are deflected to generate a lift force resulting in the additional torque when the blades are positioned intermediate the minimum and the maximum drag positions. Said device may be called SAIL-MILL when applied as a wind mill wherein an automatic means for positioning said two extreme drag positions appropriately with respect to the wind direction is included.
REFERENCES:
patent: 3295827 (1967-01-01), Chapman et al.
patent: 4178126 (1979-12-01), Weed
Hornsby Harvey C.
Peterson Christine A.
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