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OwnerAndrei Leonidovich Shpadi, Vladimir Fedorovich Timofeev +2inventors
InventorsAndrei Leonidovich Shpadi, Vladimir Fedorovich Timofeev, Aleksandr Borisovich Ushkov, Aleksandr Aleksandrovich Talov
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The invention relates to a screw propeller and its variants for converting mechanical energy in a fluid medium, and can be used in the form of water and air screws for engines and propulsers, making it possible to simplify the production method of propeller blades, to reduce the dimensions and material consumption of propeller blades, and to simultaneously increase a thrust produced thereby without decreasing the strength and efficiency thereof. The inventive propeller comprises at least two scimitar-shaped blades whose basic sections are fixed to the hub of a driven shaft. The basic section of each blade is straight and scimitar in shape, wherein the front edge of the blade is bent backwards in relation to the direction and plane of rotation and gradually transforms into the inverse, scimitar-shaped end section. Moreover, the front edge of the blade is forwardly bent in relation to the direction and plane of rotation. The blades are arranged along the propeller axis and fastened by means of the end sections in such a way that an axially symmetric figure is formed. The involute of all the blades of the propeller is shaped in the form of a single integral flat figure provided with one or more holes (5) corresponding to the coupling size of the hub of a driven shaft.
A propeller comprising scimitar-shaped blades, the start sections of which are attached to the drive shaft hub, distinctive in that the start section of each blade is straight scimitar-shaped wherein the blade's leading edge is bent backward relative to the direction and plane of rotation, and blends gradually into the reverse scimitar-shaped end section wherein the blade's leading edge is bent forward relative to the direction and plane of rotation, the blade is twisted along the propeller axis, providing gradual change of the angle of incidence along the entire blade, and attached at its end section to the propeller axis, wherein the start and end sections of the blade are attached at different angle of incidences.
A propeller comprising scimitar-shaped blades, the start sections of which are attached to the drive shaft hub, distinctive in that the propeller has three and more blades, the start section of each blade is straight scimitar-shaped wherein the blade's leading edge is bent backward relative to the direction and plane of rotation, and blends gradually into the reverse scimitar-shaped end section wherein the blade's leading edge is bent forward relative to the direction and plane of rotation, the blades are twisted along the propeller axis, providing gradual change of the angle of incidence along the entire blade, and attached at its end section to the propeller axis, wherein the start and end sections of the blade are attached at different angle of incidences.
A propeller comprising scimitar-shaped blades, the start sections of which are attached to the drive shaft hub, distinctive in that the propeller has two blades, the start section of each blade is straight scimitar-shaped wherein the blade's leading edge is bent backward relative to the direction and plane of rotation, and blends gradually into the reverse scimitar-shaped end section wherein the blade leading edge is bent forward relative to the direction and plane of rotation, the blades are twisted along the propeller axis, providing gradual change of the angle of incidence along the entire blade, and attached by their end sections forming and axially symmetrical figure, wherein the start and end sections of each blade are attached at different angles of incidences and joined into a single one-sided Mobius surface with a single bend, wherein at the attachment points the surfaces of the start and end section of each blade are turned 90 degrees relative to each other, while the propeller axis and the end section surfaces of both blades are located in the same plane.
An improvement of propeller blades, characterized in that the improvement of the entire sum total of propeller blades is a single one-piece plane figure comprised of spiral-shaped elements forming a symmetrical figure with one or more holes for the coupling dimension of the propeller drive shaft hub.
Dependencies are inferred from the claim text.