Abstract:
Bei einem Wasserstrahlantrieb (1) für ein Wasserfahrzeug, mit einem Ansaugbereich (2), einem an den Ansaugbereich anschließenden Impellerbereich (3), in welchem ein einstufiger Impeller (4) angeordnet ist, und einer, an den Impellerbereich anschließenden Austrittsdüse (5), wobei der Wasserstrahlantrieb einen Antriebsmotor (6) aufweist, welcher wenigstens mittelbar mit einer Impellerantriebswelle (7) des Impellers (4) verbunden ist, wird vorgeschlagen, dass der Impeller lediglich ein einziges Schaufelblatt (8) aufweist.
Abstract:
Полезная модель относится преимущественно к судостроению, в частности к водометным движителям. Техническим результатом предлагаемой полезной модели является повышение коэффициента полезного действия импеллера для транспортного средства. Технический результат достигается тем, что подшипник установлен между корпусом транспортного средства и внешней стороной полого цилиндра, а лопасти непосредственно зафеплены исключительно на внутренней стороне полого цилиндра. Привод импеллера может производиться посредством зубчатого колеса на торцевой части полого цилиндра импеллера. Указанное выполнение привода легко реализуется и не снижает коэффициента полезного действия импеллера, так как не вносит дополнительного препятствия потоку. Технический результат - повышение коэффициента полезного действия обусловлен минимизацией механических помех потоку жидкости или воды. С потоком жидкости или воздуха взаимодействуют только лопасти, корпус судна и небольшая часть полого цилиндра. Полезная модель может быть с успехом применена при производстве импеллеров для транспортных средств с повышенной эффективностью.
Abstract:
The device includes conveying ducts of the fluid (2, 9), a tubular mean (1) with variable internal volume (1'), a tapered onion-shaped body (17) centred (18) inside the tubular mean, a nozzle (16) for the ejection of the fluid adjustable in position and opening for the variation of said internal volume (11), one or more gas injectors (21), and means to change the direction of the jet (6). In this way a fluid with variable characteristics can be obtained which allows the adjustment of the intensity, flow, direction and slant of the jet (6), moreover releasable also above the water surface (10), in view of the optimisation of the increased performances and consumption reduction. Unlike the devices of the known technique suitable only to convey the fluid and give the flow a single direction, the jet (6) is not diverted by other members, but is oriented through the joint (8) which allows its displacement in all the directions, in fact thanks to this said jet (6) can be directed without damping. It finds peculiar application in the propulsion and control of the hydrodynamic flow in the water-jet propelled boats or craft, besides as retrofit of easy embodiment to be installed also on the boats that have a traditional water-jet.
Abstract:
Schiff mit einem Antrieb durch Innenbordmotoren mit Propellern (3) und durch Waterjets (1), die Wasserstrahlen (7) erzeugen, wobei die Innenbordmotoren (2) als Elektromotoren ausgebildet sind und die Waterjets (1) unter dem Schiffsboden angeordnet werden und wobei die elektrischen Innenbordmotoren in Skegs (10) an der Schiffsunterseite untergebracht sind, wobei zwischen den Skegs (10) ein Strömungskanal für die von den Waterjets (1) ausgestossenen Wasserstrahlen (7) ausgebildet ist.
Abstract:
In order to make it possible to accelerate a fluid traversing the present device while avoiding important frictions and efficiency losses, the device according to the invention is essentially comprised of a combination of two main members: The acceleration member comprised of hollow revolution bodies (1) containing the blades (2) and (3) for driving the fluid, is an assembly having rotation speeds and intended, while renouncing to a large extent to produce an immediate thrust effect, to use the centrifugal force in order to substantially increase the kinetic energy of the fluid. The sail outfit (13) and (14) having its surfaces subjected to the accelerated fluid, reacts, deviates the trajectories, makes them tend towards a privileged direction in the form of elementary jets which tend to be decentrifugated, linear, homogeneous, docile in order to pass round the hubs, gather through an evacuation conduit, or produce special hydrodynamic effects.
Abstract:
A jet propulsor is provided with helical blades or guiding grooves on the inner wall to increase the friction of fluid, so that the loose fluid is pressurized to converge and twist, which forms the interior pressure and generates great thrust. In addition, there is less air in the fluid, and the friction of bubble is small, so the noise can be greatly decreased. Since the invention don't adopt the conventional propeller as the thruster, the cavitation can be avoided, the fluid drag problem is also prevented. Therefore the thrust can be greatly increased.
Abstract:
A highly efficient watercraft propulsion system that operates continually submerged and relies on a non-circular variable area pump discharge opening which is configured, positioned and oriented so as to maximize the hydraulic reaction between the high velocity water jet stream and the surrounding body of water and is driven by a positive displacement pump.
Abstract:
A mechanically reconfigurable marine propulsion device (10) that adapts to engine torque and/or vessel speed thereby providing improved propulsive efficiency and performance. The axial flow propulsion device has two or more stages each having an impeller section and a stator section. Stator vanes (40, 42, 44) and/or the pumping chamber (19) provide a flow diffusion that generates increased hydrostatic pressure from ram pressure recovered from high velocity working fluid which, due to reduced fluid velocity and increased hydrostatic pressure, lowers cavitation events and frictional losses within the propulsion device. Optionally, variable-pitch vanes (80, 82) in the stator section control the amount of ram pressure imparted to the working fluid. Also optionally, variable-pitch inlet guide vanes (46) control the whirl angle and/or mass flow rate of incoming fluid independently of rotor or vessel speed. A set of fixed or variable exit guide vanes aft of the pumping chamber provides flow straightening.
Abstract:
A channel-wing-ducted propulsor high-lift combination is provided with additional high-lift generating devices and the optional further combination of an ejector nozzle for enhanced thrust which all may be provided with means for varying the lift vector generated by the device and also have variably directed thrust. Various vehicles using the propulsor are described as are method and means for using and controlling them.