EP1150882A1 - Cycloid thrusters having blades whose shape and orientation are elastically modified by hydrodynamic thrusts - Google Patents
Cycloid thrusters having blades whose shape and orientation are elastically modified by hydrodynamic thrustsInfo
- Publication number
- EP1150882A1 EP1150882A1 EP00901681A EP00901681A EP1150882A1 EP 1150882 A1 EP1150882 A1 EP 1150882A1 EP 00901681 A EP00901681 A EP 00901681A EP 00901681 A EP00901681 A EP 00901681A EP 1150882 A1 EP1150882 A1 EP 1150882A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- blade
- pivot
- blades
- cycloid
- orientation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 241000251468 Actinopterygii Species 0.000 claims abstract description 3
- 239000003380 propellant Substances 0.000 claims description 17
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- 239000002184 metal Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 229920001084 poly(chloroprene) Polymers 0.000 claims description 3
- 239000005060 rubber Substances 0.000 claims description 3
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- 230000009286 beneficial effect Effects 0.000 abstract description 4
- 238000010009 beating Methods 0.000 abstract 1
- 210000000006 pectoral fin Anatomy 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 241001465754 Metazoa Species 0.000 description 5
- 230000004907 flux Effects 0.000 description 2
- 210000004907 gland Anatomy 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 241000252073 Anguilliformes Species 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 241000204801 Muraenidae Species 0.000 description 1
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- 210000002105 tongue Anatomy 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H1/00—Propulsive elements directly acting on water
- B63H1/02—Propulsive elements directly acting on water of rotary type
- B63H1/04—Propulsive elements directly acting on water of rotary type with rotation axis substantially at right angles to propulsive direction
- B63H1/06—Propulsive elements directly acting on water of rotary type with rotation axis substantially at right angles to propulsive direction with adjustable vanes or blades
- B63H1/08—Propulsive elements directly acting on water of rotary type with rotation axis substantially at right angles to propulsive direction with adjustable vanes or blades with cyclic adjustment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H1/00—Propulsive elements directly acting on water
- B63H1/02—Propulsive elements directly acting on water of rotary type
- B63H1/04—Propulsive elements directly acting on water of rotary type with rotation axis substantially at right angles to propulsive direction
- B63H1/06—Propulsive elements directly acting on water of rotary type with rotation axis substantially at right angles to propulsive direction with adjustable vanes or blades
- B63H1/08—Propulsive elements directly acting on water of rotary type with rotation axis substantially at right angles to propulsive direction with adjustable vanes or blades with cyclic adjustment
- B63H1/10—Propulsive elements directly acting on water of rotary type with rotation axis substantially at right angles to propulsive direction with adjustable vanes or blades with cyclic adjustment of Voith Schneider type, i.e. with blades extending axially from a disc-shaped rotary body
Definitions
- Cycloid thrusters whose shape and orientation of the blades are elastically modified hydrodynamic breakouts.
- the angular position of pivoting of the pivot (3) is determined at all times by an appropriate device, specific to the cycloidal thruster considered, on which the said improvements apply.
- Each of these pins (3) is connected to the end of the "elongation" (a term used in aviation) with a profiled blade (4) wing shaped plane, so that its axis passes through this blade in its thickness parallel to this "elongation".
- the direction of the blade profile chord is therefore linked to the angular position of its pivot (3), which is its only support.
- the appropriate device mentioned above is still designed, in all cycloid thrusters for all the blades creates a flow of water perpendicular to the shaft (5), and consequently reverse thrust on the ship by reaction when the disc (1) is rotated.
- the present device proposes to remedy these drawbacks by giving the blades as much as possible the camber that suits them at all times, and by acting immediately on the "pitch" in a beneficial way (by modifying the average orientation of the strings of each blade) each time the operating parameters change. - o -
- the cycloid thrusters presented in this presentation are characterized in that each of their blades (4) is traversed in its entire elongation, in its thickness, by the pivot (4), which must also pass very close to its edge d 'attack.
- the connection of this blade with its pivot, or its own structure, or both in combination must moreover have an elasticity and a flexibility which determines at all times both its camber and a deviation of its orientation, under the effect of thrusts imparted to it by the relative flow of water it receives.
- This orientation before deflection being that given to the chord of its profile by the appropriate device mentioned above, which is specific to the cycloid propellant concerned, when the water flow is zero. This is the case when the propeller is stationary on a ship without wanders; the blade profile is then intended to be symmetrical.
- Vr vector being the vector sum of the progress Va and the vector v representing the inverse of the peripheral speed of the pin (4).
- Vr is the speed of the flow that actually receives the blade
- this elasticity and flexibility are due to the inherent qualities of the intrinsic structure of the blade (4) and possibly by an elastic coupling arranged between the latter and its pivot (3). This latter function can be achieved simply by direct fixing of the pivot (3) on an elastic element forming part of the structure of the blade (FIG. 6 7).
- the claimed device first requires that this pivot (3), holding the blade, has a very "advanced” position, close to its leading edge, so that the hydrodynamic thrusts can give it the desired camber ( Figures 6 7 8 9 10 11). If this were not so, the curvature, although being in the desired direction ( Figure 2), would lead to an excessive incidence of the relative flux near the leading edge, which would affect its perfect flow.
- pivots (3) must moreover completely cross the blade in its thickness, parallel to its "elongation", so that they can carry out its maintenance over a large width thereof, so as to give it a regular, free curvature. unwanted local torsion and deformation.
- the elastic deformation of the blade requires that its structure is flexible and resilient in such a way that it takes the most efficient form of any part of its circular movement.
- this structure can be homogeneous and composed of a single material. It can also be much more complex and may or may not include internal or external reinforcing ribs, arranged longitudinally or transversely, which may or may not provide cells filled with a gas (most often air).
- the materials used alone or in combination may be metals, plastics, rubber, neoprene, glass or carbon fibers, or any other material whose elasticity is suitable.
- the hydrodynamic thrusts can reverse this curvature from a certain distance from the pivot due to the reciprocating movement carried out.
- the profile of the blade thus initiates a quasi-sinusoidal shape, of rather short length in FIG. 7, but can be longer, like the body of an eel, by comprising a series of successively alternately reverse camberings which gives a curvy profile.
- a cycloid thruster with a single blade can be recommended to allow a great length thereof.
- a rope that is shaken laterally also shows that the thrusts of the flow on a thin and flexible body easily make it take a sinusoidal shape.
- a whip is also a good example • as slamming --- to end is considered to have a narrow compared with the eddies that are created there.
- This internal structure of the blade may include an approximately rectangular elastic blade, of metal, plastic, fiberglass, carbon or the like, which is fixed by one of its sides to the pivot (3).
- it may include longitudinal i ⁇ dentations along strings of profiles to determine more or less narrow tongues, of various lengths, so that the shapes and orientations of the blades are as efficient as possible.
- This elastic strip when it is no indentation, also can further comprise on its faces the flexible material intended to achieve break a typical blade profile, and then itself constitute the actual blade.
- the sampling of its thickness is not necessarily identical at any point on its surface so that its elastic flexibility is modulated so that the best camber and orientations of the blade are achieved.
- the elastic connection between pivot (3) and the structure of the blade (4) can consist of a silentbloc constituted by a ring of rubber or neoprene or any other elastic material which encloses, by being fixed to it, the pivot (3 ).
- the outer cylindrical surface of this ring being secured to at least one element of the structure of the blade (4).
- This silent block can be unique and long enough for a good hold of the blade or split in several copies along the pivot.
- This assembly can be simplified if the elastic material no longer constitutes a ring but is simply the elastic material itself of which is composed, at least partially, the blade itself.
- the pivot (3) being free to rotate in a tubular recess being adjusted to it with gentle friction, in the thickness of the blade.
- the inner end of the springs being fixed on the pivot (3) and the other on at least one element of the blade structure.
- the "handle part" representing the pivot (3) proper remains in connection with the blade orientation device specific to the cycloid propeller considered.
- the silentblocs (8) or springs (9) are placed between the pivot (3) and the latter device (on one side or the other of the disc 1).
- the pivot (3) for good support, is maintained by at least two bearings (2 and 7 in figure 9) arranged, one on the disc (1) the other on a structure being integral with it (most often a another parallel disc (1 '), which generally constitutes a drum with the first).
- the pivot (3) passes smoothly through the circular element with fingerprints (6) in a concentric tubular recess (FIG. 12).
- the mentioned silentblocs (8) or springs (9) connect each circular element (6) to its pivot (3); their external parts being fixed on the first city, and their internal parts on the second.
- camberings produced by these devices are inverse to those usually observed on the more common profiled blades.
- aircraft wings have their curvature facing the underside (as well as the propeller blades), while the opposite occurs on engines on display here.
- the camber now proposed is however entirely consistent with that observed on the caudal fins of animals and the fins of swimmers ( Figures 2 6 7 8 9 10 11), whose performance is no longer to be demonstrated. This characteristic is explained by specialists by the transverse movement, straight and alternative, of these organs which generates the beneficial vortices mentioned above ( Figure 2). It is indeed well known that these vortices do not exist (and are on the contrary to be avoided) for the blades receiving a relative flow of fluid of constant force and direction.
- cycloid thrusters generally have their blades in the shape of a rectangle or trapezoid. Those presented here can have the same shapes of blades, but the latter can also take those of the caudal fins of aquatic animals, which have benefited from many millennia of development. These recommended forms are those, approximate, of "very flat crescents" with the ends curved towards the trailing edge. These are most often of uneven surfaces; the closest to the disc (1) can even be zero to reduce the bending of the shaft (5) and the pivots (3).
- This new propellant cycloid is characterized in that the angular positioning of the pins (3) are such that in the absence of flow, or when the disc (1) is stationary, the blades remain parallel to each other in a specific direction (which is the one chosen for the propulsion thrust).
- the device carrying out this original orientation (FIG. 9) comprises circular elements with imprints (6) each connected concentrically with a pivot (3); either directly or, as has already been seen (FIG. 12), by means of silentbloc or spiral spring.
- the silentbloc cylinder (8) can be replaced by the flexible material constituting all or part of the blade itself, in accordance with what has already been said.
- a transmission chain (13) (figure 9 and 10 right), or an intermediate toothed pinion 12 (figure 10 left) whose bearings are maintained on the disc (1), connects the circular element (6) to a central element (14) of the same nature and of the same diameter kept immobile and in position coaxial with the shaft (5) of the disc (1).
- the central sheave when the belt device is adopted, or the central pinion in the case of chains, is in reality in the form of a "stack" (14) coaxial of these identical circular elements forming a block.
- this stack (14) is in fact only a single pulley provided with as many grooves as sheaves (6); each of these being placed opposite a groove of the pulley (14).
- a similar device is used if it is transmission chains.
- a single central pinion (14) is sufficient for all the intermediate toothed pinions (12) if they are used. An initial "setting" when all these elements are stopped is necessary so that the blades are parallel to each other.
- the shaft (5) of the rotating disc (1) is held by two bearings (17 and 18 Figures 1 and 9) which are connected to the structure of the ship.
- a large toothed pinion (19) is keyed onto the shaft (5) by being meshed on a smaller toothed pinion (20) rotated by the motor torque.
- This propellant can be "outboard” or “inboard depending on whether it is arranged outside a transom or inside the hull of the ship (in the latter case a cable gland or a well should be planned).
- This pivot (15) (then leaving the shaft 5) is fixed at right angles to the end of a lever (16) which can be used directly by the helmsman to steer the ship.
- This lever can be articulated by its other end on a rod which can slide under the action of a hydraulic piston or a simple sheathed cable controlled remotely by this same coxswain.
- the disc (1) is actually a sealed drum, consisting of a fairly short vertical cylinder (16) closed at its ends by two large horizontal discs (1) and (1 '), containing the sheaves (6 14) (all of identical diameters) and the belts (13) already described.
- the "notches" and the corresponding fingerprints on these elements being chosen so that the blades, in the absence of any hydrodynamic thrust, remain parallel to each other (that is to say when stationary).
- the pivots (3) of the sheaves being held high and low by bearings (2) and (7) fixed on the discs (1 and the).
- "Spinnaker” seals mounted on these pivots ensuring the tightness of the drum at the points, close to the bearings (2), where they exit from it.
- the motor shaft (5) is maintained by two bearings (17 18) secured to the hull of the ship.
- the profiled blades (4) chosen in this model are rectangular in shape and of thin symmetrical profile (propellant stopped).
- the motor shaft (5) is tubular and an axis (15) can pivot with gentle friction in the obviously central one. Its lower end is fixed concentrically to the central pulley (14), and its upper end, beyond the end of the shaft (5) of the drum, is fixed to the end of a perpendicular lever (16) intended to be operated manually. to form a "bar” similar to that of a classic rudder.
- This unique propeller with flexible blades can be placed in an "outboard", on a transom; or in "inboard”. In the latter case the drum shaft passes through the shell through a cable gland.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Toys (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9901100A FR2789048B1 (en) | 1999-02-01 | 1999-02-01 | CYCLOID PROPELLER WHOSE SHAPE AND ORIENTATION OF POLES ARE ELASTICALLY MODIFIED BY HYDRAULIC PUSH |
FR9901100 | 1999-02-01 | ||
PCT/FR2000/000214 WO2000044616A1 (en) | 1999-02-01 | 2000-01-31 | Cycloid thrusters having blades whose shape and orientation are elastically modified by hydrodynamic thrusts |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1150882A1 true EP1150882A1 (en) | 2001-11-07 |
Family
ID=9541438
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00901681A Withdrawn EP1150882A1 (en) | 1999-02-01 | 2000-01-31 | Cycloid thrusters having blades whose shape and orientation are elastically modified by hydrodynamic thrusts |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1150882A1 (en) |
JP (1) | JP2002535204A (en) |
FR (1) | FR2789048B1 (en) |
WO (1) | WO2000044616A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8795008B2 (en) * | 2011-04-06 | 2014-08-05 | Twin Disc, Inc. | Two-into-two or one hybrid power device for a marine vehicle |
CN102616357A (en) * | 2012-03-08 | 2012-08-01 | 郑志刚 | 360-degree biomimetic fluctuation propulsion device |
FR3114297B1 (en) * | 2020-09-24 | 2023-05-05 | Naval Group | TROCHOIDAL THRUSTER FOR NAVAL APPLICATION |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE608887C (en) * | 1933-03-18 | 1935-02-02 | Maschf | Paddle wheel propellers with swinging blades |
FR2039765A5 (en) * | 1969-03-21 | 1971-01-15 | Aubrey Colin Hill | |
DE3329807A1 (en) * | 1983-08-18 | 1985-03-07 | Friedrich 4320 Hattingen Twachtmann | Control fin propeller |
FR2651017B1 (en) | 1989-08-17 | 1991-11-15 | Lipp Robert | DEVICE FOR ORIENTING THE BLADES OF A ROTOR IN A TRANSVERSE FLOW OF FLUID AND APPLICATION THEREOF |
IT1276965B1 (en) * | 1994-10-21 | 1997-11-03 | Blohm & Voss Int | DEVICE INDEPENDENT FROM THE MAIN ENGINE, USED AS AN ACTIVE MANEUVERING ORGAN, FOR SHIPS |
-
1999
- 1999-02-01 FR FR9901100A patent/FR2789048B1/en not_active Expired - Fee Related
-
2000
- 2000-01-31 WO PCT/FR2000/000214 patent/WO2000044616A1/en active Search and Examination
- 2000-01-31 JP JP2000595885A patent/JP2002535204A/en active Pending
- 2000-01-31 EP EP00901681A patent/EP1150882A1/en not_active Withdrawn
Non-Patent Citations (1)
Title |
---|
See references of WO0044616A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2000044616A1 (en) | 2000-08-03 |
JP2002535204A (en) | 2002-10-22 |
FR2789048B1 (en) | 2001-08-10 |
FR2789048A1 (en) | 2000-08-04 |
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Legal Events
Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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Effective date: 20010829 |
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Effective date: 20020927 |
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RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: LIPP, ROBERT EDMOND |
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RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: LIPP, ROBERT EDMOND |
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GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 20031204 |