Fluid reaction surfaces (i.e. – impellers) – Sustained ancillary movement of rotary working member – Continuous rotation about plural axes
Patent
1993-08-19
1995-10-31
Kwon, John T.
Fluid reaction surfaces (i.e., impellers)
Sustained ancillary movement of rotary working member
Continuous rotation about plural axes
416108, F03D 306
Patent
active
054624061
ABSTRACT:
The present invention provides an offset control mechanism and a variable blade-pitch mechanical kinematic system for cycloidal propellers. This is achieved by the concentric positioning of the drive shaft, the variable offset circular guide track, the eccentric X-Y slide plates, the propeller hub and the variable blade-pitch kinematic linkages, all about the axis of propeller rotation. The control actuation system is free-flooded in water and non-rotating, yet in close proximity to the rotating propeller hub. The pitch of each propeller blade is cyclically varied by the kinematic levers on each blade following a circular guide track during each revolution. Additionally, the circlar track swivel guide in the blade lever kinematics can also lever a trailing blade-flap to provide additional cyclic propeller lift in the direction of motion. The propeller improvements include a low-drag propeller hub and a variable-pitch blade ground plane ring about the ends of the blades.
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J. M. Voith GmbH, "The Voith-Schneider Propeller and its Incorporation in Ship Design."
Fenton Miles
Ridgewell Barry A.
Kwon John T.
Vitron Systems Inc.
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