Marine propulsion – Screw propeller – Having means to control flow around propeller
Patent
1984-10-02
1986-02-18
Blix, Trygve M.
Marine propulsion
Screw propeller
Having means to control flow around propeller
440 81, 114163, 114312, 114338, 114 56, 244199, B63G 808
Patent
active
045711925
ABSTRACT:
A self-propelled spherical vehicle (10) for operation in a fluid medium utilizes an impeller (12) of approximately half the diameter of the sphere for propulsion. In addition to driving the vehicle, the impeller acts to draw the flow of fluid smoothly over the after part of the sphere, thus avoiding or minimizing the tendency of the fluid flow to separate from the surface and create turbulence. Compensation for impeller torque is effected in one embodiment by a series of non-rotating stator blades (14) carried coaxially of and immediately aft of the impeller and which are curved to counter the torque of the impeller on the vehicle. The stator structure is supported at the rear of the housing by brackets (18) including pivotal supports providing support in the vertical plane. Steering in azimuth and/or yaw is effected through pivotal supports (16,16',16") and actuators and (20, 24, 20', 24', 20", 24") operative in the azimuth and/or pitch plane to effect rotation of the stator around the pivotal supports (16,16',16"). In another embodiment impeller torque is compensated for by contra-rotating impellers. In another embodiment impeller torque is compensated for by contra-rotating impellers (42, 44).
REFERENCES:
patent: 1853890 (1932-04-01), Augner
patent: 2196706 (1940-04-01), Naginskas
patent: 2433971 (1948-01-01), Adams
patent: 2914013 (1959-11-01), Bizjak
patent: 3137265 (1964-06-01), Meyerhoff
patent: 3442244 (1969-05-01), Clark et al.
patent: 4377982 (1983-03-01), Gongwer
patent: 4455962 (1984-06-01), Gongwer
Allied Corporation
Avila Stephen P.
Blix Trygve M.
Parsigian Vett
Smith Robert C.
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