Propeller screw

IPC classes for russian patent Propeller screw (RU 2482011):

B63H1/14 - MARINE PROPULSION OR STEERING (propulsion of air-cushion vehicles B60V0001140000; peculiar to submarines, other than nuclear propulsion, B63G; peculiar to torpedoes F42B0019000000)

Another patents in same IPC classes:

Method of producing flapping motion and flapping screw to this end / 2482010

Invention relates to propulsors for air and water transport facilities. Method of producing flapping motion by blades of screw fitted on screw hub comprises combining blades revolution about hub axis and about their lengthwise axes. Said blades revolution about their lengthwise axes is effected indirection opposite that of hub rotation and at angular speed equal to that of hub. Flapping screw comprises blades with their lengthwise axes are set in one plane or intercrossed in parallel planes, or intercrossed in planes at crossing angles of 0 to 90 degrees. Proposed screw is equipped with intermittent drive to allow n blade additional turns per one hub revolution in or against hub rotational direction. Said screw may be equipped with extra mechanism for adjustment of blade inclination and/or medium flow guide device.

Screw propulsor / 2482000

Invention relates to converters of engine or other energy source work into that driving transport facilities. Screw propulsor comprises housing composed of hollow cylindrical multistart helical jacket. Said jacket is arranged along the vehicle body edges to revolve thereabout. Said housing represents a multistart helical surface arranged along its edges with helical grooves inside and outside at 5 to 45 degrees to jacket lengthwise axis and shaped to birecurvate recesses. Centers of curvature of said recesses are located inside and outside jacket cross-section. Jacket is composed of equal-width one or more tapes coiled in helical turns interconnected by lengthwise edges. Said tapes are bent in zigzag manner along flexure lines arranged at angle to lengthwise edges. Said tapes form, along outer and inner surfaces, wavy helical surfaces shaped to curved recesses directed to one side at 5 to 45 degrees to jacket lengthwise axis. Said recesses may differ in both shape and size. Distance between flexure lines equal the sum of lengths of perimeters of geometrical figures of inner and outer surface recesses.

Direct-flow propulsor for water transport / 2477699

Invention relates to ship building and may be used for various ships. Proposed propulsor comprises pipeline and device to create water jet by forming travelling water waves. Said pipeline is arranged below water-line in symmetry on both sides of ship hull. Holes extending into pipeline made at equal distance L along ship hull. At least, two pairs of displacement piston pumps are located inside the hull on every side. Said pumps are rigidly jointed with ship hull and communicated with said holes via feed hoses to run in reciprocation mode. Extra hoses are arranged between pump cylinders and said holes. Switching solenoid valves are arranged in hoses and extra hoses.

Screw propulsor / 2473447

Invention relates to devices in tended for converting engine power output into driving force to move transport facility on soil, in water and under water. Drive propulsor comprises propulsor proper and housing. It represents hollow cylindrical helical jacket arranged along perimeter of transport facility to rotate there around. Strips are coiled in vertical lengthwise plane and bent in screw lines across the mandrel composed of paraboloid of revolution to make screw lines and helical curvilinear concave surfaces with center of curvature outside screw jacket.

Conical propulsor / 2472664

Invention relates to devices is intended for converting engine power output into driving force to move transport facility on soil, in water and under water. Conical propulsor represents hollow conical helical jacket mounted in perimetre of transport facility body front to remove there around and made up of curved convex strips. Strip side edges represent curves of 2^nd-order curvature of width varying over aforesaid jacket length from inlet to outlet. Strips are coiled in vertical lengthwise plane and bent in screw lines across the mandrel composed of paraboloid of revolution to make screw lines and helical curvilinear concave surfaces with center of curvature outside screw jacket.

Drive propulsor / 2472663

Invention relates to devices in tended for converting engine power output into driving force to move transport facility on soil, in water and under water. Drive propulsor comprises propulsor proper and housing. Propulsor is composed of hollow helical jacket mounted all over edges of transport facility and equipped with means to revolve propulsor revolve about its axis and housing. Propulsor is made from one equal-width ribbon bent along flexure lines made at angle to ribbon lengthwise edges to make screw lines on outer surface and screw curvilinear surfaces inside aforesaid helical jacket that differ in both shape and sizes. Distance between flexure lines equals the sum of perimetres of convex curvilinear surface along perimetre of hollow helical jacket.

Direct-flow propulsor / 2470827

Invention relates to converters of engine or other energy source work into that driving transport facilities. Proposed propulsor is composed of hollow cylindrical multistart screw jacket made up of one and more equal-width bands. Screw lines and surfaces are made on jacket outer surface directed in one direction at 5°-45° to its lengthwise axis. Surfaces feature polygonal shape composed of different geometrical figures with four and more lateral sides. Said figures differ in both geometry and sizes. Said hollow screw jacket is mounted all along transport facility body to rotate about its lengthwise axis and said body.

Propeller (screw) / 2469906

Propeller (screw) includes hub and blades with inlet and outlet portions. Outlet portions of blades throughout their height are made with periodical deviations of outlet edge relative to design value. Amplitude of blade outlet edge profile deviations from design value in height is maximal or equal to zero at maximum radius of blade.

Noiseless device of manoeuvrable submarine screw-propeller / 2469905

Device of manoeuvrable submarine screw-propeller includes submarine body, driving shaft, screw propeller on telescopic shaft with hub and with curved ends of blades, circular cavity, sound-proofing steering tube. The screw propeller is installed on brackets in tube cavity and pivotally connected with driving shaft. Inner and outer surfaces of tube are covered with viscoelastic damping material, with cavity covering with wear-resistant material layer. End of the tube is provided with flange. Bodies of four hydrodraulic (pneumatical) cylinders-manipulators are rigidly fixed along flange perimetre at equal distances. Rods of cylinders-manipulators are pivotally attached to disk eccentrics. Platform with movably attached eccentrics is installed on body. Driving shaft of submarine passes through passageway in the centre of the platform.

Floating craft of kovalev is / 2469904

Floating craft contains engine kinematically connected with propeller. The engine is made as rotor with vertical rotation shaft. The rotor is equipped with vertical and horizontal blades. Plane of undisturbed water surface is plane of symmetry for blades.

Propulsor / 2245278

Propulsor has two wheels of similar diameter at parallel pivot axles mounted at distance which is lesser than diameter of any wheel; blades are located between wheels and are connected with them by means of additional pivot axles.

Amphibian vessel / 2261820

Transversal links of propulsor tape are made in form of cylindrical members filled with elastic component and provided with external elastic envelope; they are secured on rigid beams which are interconnected by means of flexible segments and are filled with elastic material on side facing the hull. Distributing well of hydrostatic lubrication unit is provided with ball-type or roller-type valve.

Propulsor / 2263605

Proposed propulsor has central shaft with gears of chain gear train mounted on it; each gear is connected with satellite links by means of chain gear train. Satellite links are located radially and smoothly around central shaft. Each link includes bladed reducer consisting of spur gears and gear of chain gear train; one of spur gears is secured on blade axle which is mounted horizontally and its ends rest against brackets secured on hubs mounted at ends of central shaft. Central shaft is connected with worm reducer and gears of chain gear train connected with engine drive mechanism are secured on brackets coaxially relative to central shaft.

Electromagnetic propulsor for liquid media / 2265550

Proposed electromagnetic propulsor includes laminated ferro-magnetic cylindrical core of stator with three-phase encapsulated winding rigidly secured in vehicle; revolving part is made in form of hollow laminated core with short-circuited copper winding; propeller blades are located inside core of revolving part. Each blade is made in form of three-layer structure: two outer layers are made from brass, bronze or plastic and inner layer is made in form of permanent magnet made from sintered powder material of high coercive force; number of blades is even and is equal to number of poles of stator winding.

Propeller / 2279992

Proposed propeller has blades of axisymmetric shape and flat profile which are mounted on hub; each blade is provided with end ridge. Each end ridge is connected with respective blade for change of fixed angle between its working surface and working surface of this blade from 180° to 0°. Such construction of propeller ensures obtaining additional pulse of thrust or braking with no increase in consumed power.

Propeller / 2279992

Device for moving object in gas or liquid / 2281414

Device comprises propeller that is connected with the object, provided with blades, and used for generating waves in gas or liquid. The blades of the propeller have symmetrical cross-sections with respect to the axis of symmetry in the direction of rotation of the propeller. The means for absorbing the waves is secured to the object and oriented in the direction of wave propagation that is the same as the direction of movement of the object.

Propeller with detachable blades (versions) / 2284278

Propeller has hollow body of hub, many blades and many fasteners for each blade. Each fastener includes tension rod and flange member mounted on tension rod. Propeller blades may be of variable-incidence type for control of incidence and may be fixed in selected position by means of fasteners. Flange member has many slots and tension devices received by these slots. Tension devices may be extended from flange member towards wall of hub body, thus applying tension to tension rod.

Fin-type propulsive device / 2284945

Drive of fin-type propulsive device is mounted in housing. Secured rotatably in upper and lower parts of housing of drive are respectively shaft and crankshaft which are interconnected by means of changeable gear train. Two overrunning clutches are mounted on shaft; one clutch is connected with handle to which muscle power is applied and second clutch is connected with pneumatic spring. Crank press-fitted on crankshaft is connected with slide block which is connected in its turn with angle levers rigidly connected with stalk of fin; lower crank which is also press-fitted on crankshaft is connected with lower slide block. Slide block and lower slide block are movable and are received by slots in drive housing. Pushers are movably mounted in slide blocks. Pushers are movable in slots owing to availability of threaded axles with adjusting wheels. Lower pusher is articulated with parallel link mechanism. Provision is made for change of crank angle.

FIELD: transport.

SUBSTANCE: invention relates to ship building, namely, to propeller screws. Propeller screw comprises vaned hub. Hub vanes comprise driving surface and drawing surface. Said surfaces have radial blind holes shaped to truncated ball and shifted relative to each other in cross-section. Hole depth H varies from 0.7D to 0.8D where D is hole diameter. Hole diameter smoothly decreases in compliance with vane thickness decrease. Hole inner surface is coated with polymer material of minimum friction factor (in interaction with water) and high resistance to aggressive media.

EFFECT: reduced power consumption.

1 cl, 5 dwg

The invention relates to the field of shipbuilding, namely the design of propellers.

Known propeller containing the hub where the blades with inlet and suction surfaces. On the surfaces of the blades of the propeller are made grooves with undercut, which has a insert from a material with high damping ability (patent of Russia №2387572, VN 1/26)which results in a reduction of the noise characteristics of the propeller.

Known propeller containing the hub, with flat blades, which in order to reduce the resistance to fluid flow is made transverse open cut (patent of Russia №2390463, VN 1/14). The screw has a rather low efficiency and increased noise characteristics.

Known propeller containing the hub where the blades with inlet and the suction surfaces (patent of Russia 2244657, VN 3/00, 2005) prototype.

The known device has a significant loss of energy because of the energy of the engine of the ship goes on friction (interaction) between the fluid and the working surfaces of the blades.

The technical result, which is aimed invention is to reduce the dissipation of energy between the interacting surfaces, and hence the energy loss of the ship's engine.

Those are the technical result is achieved by what propeller includes a hub where the blades with inlet and the suction surfaces of the suction and forcing the surfaces of the blades are made radially spaced blind holes in the shape of a truncated sphere with offset relative to each other in cross section, and the depth of the hole H has a range of 0,7D<H<0,8D, where D is the hole diameter, the hole diameter gradually decreases in accordance with decrease of the thickness of the blade. The inner surface of the holes is covered with a material with a minimum coefficient of friction and high resistance to aggressive media, such as a polymeric material.

The technical result is achieved due to the fact that each hole creates a vicious maelstrom, the diameter of which is equal to the diameter of the hole. Part whirlpool protrudes outside of the blade and in contact with the liquid, which moves along the working surface of the blade, raising it above the surface of the blade. The direction of rotation of the fluid in the hole coincides with the direction of flow of fluid along the working surface of the blade. As a result, the interaction of the sliding liquid - metal is replaced by the interaction of rolling liquid-liquid, and the engine power required to friction (dissipation of energy), is significantly reduced.

In figure 1 depict the of Allen General view of the propeller; Fig 2 is a view of the screw perpendicular to the longitudinal axis; figure 3 is a longitudinal section of the blade; figure 4 - cross section a-a in figure 1; figure 5 is an illustration of the interaction of fluid flow with an aperture blades.

The propeller includes a hub 1, where the blade 2 with the inlet 3 and 4 suction surfaces, which are made radially spaced blind holes 5, offset relative to each other in cross section. Holes 5 made in the form of a truncated ball. The depth of the holes H is chosen in the range 0,7D<H<0,8D, where D is the diameter of the hole.

The diameter of the holes gradually decreases in accordance with decrease of the thickness of the blade. The inner surface of the hole 5 is covered with, for example, by spraying the material with a minimum coefficient of friction and high resistance to aggressive environments.

The device operates as follows.

In the rest of the holes 5 in the blades is filled with liquid. During rotation of the propeller, the thread 6 of the liquid, sliding on the working surfaces of the blades 2 spin liquid in the holes 5, creating in them a vicious maelstrom. The speed of rotation of the fluid in the holes depends on the speed washer thread 6 and the diameter of the holes 5. Whirlpools protrude above the surface of the blades 2, causing the washing fluid contact is not with the surface of the blades 2, and with protruding parts of the whirlpools. The direction of rotation of the fluid in the hole 5 coincides with the flow direction 6 of the liquid on the working surface of the blade 2. As a result, the interaction of the sliding liquid - metal, is replaced by the interaction of rolling liquid-liquid, and the engine power required to friction (dissipation of energy) is significantly reduced. The radial position of the holes 5 allows you to create the claimed effect of the interaction on the entire surface of the blades 2.

Because the speed of the whirlpool in holes high, their inner surfaces are not covered by sediments, shellfish, etc. in Addition, the inner surface of the hole 5 is covered (for example, by spraying) a polymeric material with a minimum coefficient of friction (reaction with water) and high resistance to aggressive environments, such as Teflon, polypropylene, polycarbonate and other

The polymer material has a high damping ability, it will also reduce the vibration of the screw during operation, thereby decreasing the noise of the vessel and decrease the energy loss of the main engine.

In the range 0,7D<H<0,8D the fluid in the hole, in contact with the surrounding flow and, no slipping, is returned into the hole, i.e. no entrainment of fluid from the hole. When H<0,7D acting the hell the surface of the blade maelstrom partially entrained wash fluid flow; when H>0,8D extends above the surface of the blade part whirlpool has a small contact area with the surrounding flow and the interaction effect is significantly reduced.

1. Propeller containing the hub where the blades with inlet and suction surfaces, characterized in that the suction and delivery surfaces of the blades are made radially spaced blind holes in the shape of a truncated sphere with offset relative to each other in cross section, and the depth H of the holes has a range of 0,7D<H<0,8D, where D is the hole diameter, the hole diameter gradually decreases in accordance with decrease of the thickness of the blades and the inner surface of the holes is covered with a material with a minimum coefficient of friction and high resistance to aggressive media.

2. Propeller, characterized in that the inner surface of the holes is covered with a polymer material.