WO2005047100A1 - Systeme de propulsion pour navires - Google Patents

Systeme de propulsion pour navires Download PDF

Info

Publication number
WO2005047100A1
WO2005047100A1 PCT/GB2004/004734 GB2004004734W WO2005047100A1 WO 2005047100 A1 WO2005047100 A1 WO 2005047100A1 GB 2004004734 W GB2004004734 W GB 2004004734W WO 2005047100 A1 WO2005047100 A1 WO 2005047100A1
Authority
WO
WIPO (PCT)
Prior art keywords
pitch
propulsion system
track
hydrofoils
angle
Prior art date
Application number
PCT/GB2004/004734
Other languages
English (en)
Inventor
Brian Robert Harle
Original Assignee
Brian Robert Harle
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Brian Robert Harle filed Critical Brian Robert Harle
Publication of WO2005047100A1 publication Critical patent/WO2005047100A1/fr

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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
    • B63H1/30—Propulsive elements directly acting on water of non-rotary type
    • B63H1/34—Propulsive elements directly acting on water of non-rotary type of endless-track type
    • 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
    • B63H1/30—Propulsive elements directly acting on water of non-rotary type
    • B63H1/34—Propulsive elements directly acting on water of non-rotary type of endless-track type
    • B63H2001/348—Propulsive elements directly acting on water of non-rotary type of endless-track type with tracks oriented transverse to propulsive direction

Definitions

  • This invention relates to propulsion of water borne vessels by means of propulsive elements directly acting on water.
  • An object of the present invention is to replace conventional screw type propellers with a plurality of interconnected hydrofoils that move through the water along a predetermined linear path to generate thrust.
  • a hydrofoil is distinguished from a flap or paddle in that the hydrofoil is presented to the water at an angle of attack such that there is a substantial laminar flow of water around the aerofoil shaped profile to generate a high pressure on the face of the foil and a lower pressure on the back surface.
  • This laminar flow creates a force which can be resolved as a drag force opposing the movement of the hydrofoil and a lift force perpendicular to the drag force.
  • the hydrofoil is moved in a direction orthogonal to the required direction of thrust.
  • a flap or paddle is normally presented to the water at
  • Propeller blades are a form of hydrofoil, and in the case of a conventional screw propeller orthogonal movement is achieved by rotating the propeller blades on a shaft that rotates about an axis substantially parallel to the propulsion direction.
  • the thrust developed by a screw propeller varies directly with the surface area.
  • thrust can to some extent be enhanced by increasing the blade-area ratio, optimising other aspect of propeller geometry or adding a contra-rotating propeller to recover rotational energy given to the wake by the first propeller.
  • limits on the diameter of the screw propeller limit the area and in turn the available thrust.
  • a marine propulsion system for a vessel comprising a plurality of variable pitch spaced hydrofoils mounted on one or more endless tracks so as to move in a direction transverse to an axis extending in a fore and aft direction of the vessel.
  • the direction extends across the beam of the vessel.
  • the direction may extend substantially horizontally, or substantially vertically, or at an angle.
  • said endless tracks may move between the hulls of the vessel.
  • the hydrofoils are mounted at spaced positions around an endless loop that passes around two spaced end wheels and has two runs extending between the end wheels. Where loading on the hydrofoils is high, each end of the hydrofoils may be mounted on such endless loops.
  • a pitch change means is provided for changing the pitch angle of the hydrofoils where they pass around the end wheels.
  • the pitch change means is operable to set the pitch angle of the hydrofoils along one run of the track at a first angle of attack and to set the pitch angle of the hydrofoils along a second run of the track in the opposite direction to the first angle so that the hydrofoils generate lift in a common direction.
  • the pitch change means may be operable to change the pitch angles of those hydrofoils on the port side of the vessel at a first angle and those hydrofoils on a starboard side of the vessel at an opposite angle to the first angle so as to steer the vessel.
  • the pitch change means may be used to set the pitch angle of the hydrofoils on a first run of the track to an angle transverse to the run of the track and those on the second run of the track to an angle substantially parallel to a second run of the track whereby the hydrofoils on the first run act as paddles to move the stern of the vessel sideways.
  • the pitch change means comprises:
  • the two discs are normally locked together, and possible means of effecting this include a positive or friction clutch between the two discs, or a pin mounted in the outer disc which engages with a toothed wheel on the inner disc.
  • each hydrofoil is pivotally mounted on at least one of the tracks and is provided with a cranked lever that has a guide pin at one end
  • said pitch change means comprises a pair of spaced guide rails alongside each run of the track, said guide rails being positioned and arranged relative to the track and the guide pins so as to receive the guide pins between the rails and thereby rotate the hydrofoils about their pivotal attachment to the track to predetermined pitch angles.
  • the guide rails may be fixed relative to the path of movement of the track so as to set predetermined fixed pitch angles or the guide rails may be selectively moveable relative to the path of movement of the track so as to vary selectively the pitch angle of the hydrofoils.
  • the guide rails may extend at an angle to the path of movement of the track so as to change the pitch angle of the hydrofoils to and from, a first angle of pitch, to and from, a second angle of pitch that is greater than, less than, or the reverse of, the first angle so as to steer the vessel.
  • Figure 1 shows typical prior known propulsion systems of a tanker as discussed above, viewed from astern, showing the ship's hull and a 7m diameter propeller;
  • Figure 2 shows the vessel of figure 1 with a notional 13.35m diameter propeller, which in practice could not be fitted;
  • FIG. 3 shows the vessel of Figure 1 with a propulsion system constructed in accordance with the present invention with a hydrofoil area equivalent to a
  • Figure 4 shows one embodiment of the proposed propulsion system of Figure 3 viewed from above;
  • Figure 5 shows the propulsion system of Figures 3 or 4 equipped with additional pitch controllers equidistant from the two drive wheels;
  • Figure 6 shows a possible means of changing the pitch of the hydrofoils of the propulsion system shown in Figures 3 to 5;
  • Figure 7 shows component parts of the pitch change mechanism shown in Figure 6.
  • Figure 8 shows a second embodiment of a pitch change mechanism suitable for use with the propulsion system shown in Figure 3; and Figure 9 shows the provision of additional stabilising means for the propulsion system of Figures 3 to 8.
  • FIG. 1 there is shown a prior known marine propulsion system in which a vessel 10 is fitted with a rotary screw propeller 11.
  • the propeller 11 is typically 7.0m in diameter.
  • Such a propulsion system would typically be used to propel a 50,000 tonnes dead weight tanker of 200m length having a beam of 32m and a draught of 11.7m.
  • the required power would be of the order of 14,000kw. If the propeller 11 could be replaced by one of 13.35m diameter as shown in Figure 2, then, as explained above, the required power would be of the order of less than 10,000kw.
  • the system 12 comprises basically an endless track 13 in the form of a pair of spaced endless metal or reinforced fabric belts, or chains, on which are mounted a plurality of spaced hydrofoils 14.
  • the endless tracks 13 are constrained to run around end wheels 15 that are driven by motors 16.
  • the hydrofoils 14 are of variable pitch design and of symmetrical profile, and as will be seen in Figure 4 pitch change mechanisms 17 are provided for altering the pitch of the hydrofoils. Assuming the tracks 13 are rotating in an anti-clockwise direction as viewed from above, the pitch change mechanisms 17 operate to ensure that the hydrofoils along one run of the track (shown in the top portion of Figure 4) have an angle of attack that generates lift in the direction of the arrow L, whereas those hydrofoils along a second run of the track (on the lower portion of Figure 4) have an angle of attack that is the reverse of those on the first run. In this way the second surfaces of the hydrofoils also produce lift in the direction of the arrow L.
  • the pitch angle of the hydrofoils are altered by the pitch change mechanisms 17 so that they assume positions almost tangential to the perimeter of the end wheels 15 when the hydrofoils 14 pass around the end wheels 15.
  • the details of some possible pitch change mechanisms will be described in relation to Figures 6 to 8.
  • the propulsion system of Figure 4 is provided with two additional pitch change mechanisms 17 equispaced between the end wheels 15 to effect steering of the vessel. Again, the exact detail of these will be described in relation to Figures 6 to 8.
  • the endless track is rotating in an anti-clockwise direction when viewed from above, and the pitch of the hydrofoils 14 is selectively changed so as to be able to provide steering of the vessel.
  • the hydrofoils 14 in both runs of the loop of the endless track 13 on the port side are set to have an angle of attack that produces lift in the direction of the arrows L2, whereas those hydrofoils on the starboard side of the vessel have their angles of attack altered so that thrust is produced in the opposite direction as shown by the arrows L3.
  • FIG. 6 shows details of the pitch change mechanism 17 adjacent to the starboard end wheel 15 on figures 4 and 5.
  • each of the hydrofoils 14 is mounted on a two-part disc assembly 19 (shown in more detail in Figure 7) to allow each of the hydrofoils to pivot about its centroid and to be held at predetermined selected positive or negative pitch angles.
  • the two part disc assembly 19 comprises an inner disc 22 and a second co-axial concentric outer disc 20.
  • the outer disc 20 is secured in a fixed relationship to the hydrofoil 14, while the inner disc 22 is similarly secured to the endless track 13.
  • the discs 22 are spaced at fixed intervals along the length of the track 13.
  • each track 13 It is preferred to mount a disc 22 on each track 13 at positions corresponding to the ends of the hydrofoils. However, it may be possible to provide the discs 20, 22 on only one of the tracks 13 (ie. at only one end of the hydrofoils 14) and to mount the other end of the hydrofoils in simple journal bearings or bushes on the respective track 13.
  • pitch change studs 26 Attached to the outer disc 20 are pitch change studs 26.
  • the pitch change studs are dimensioned and positioned so as to engage a pitch change lever 24 as will be explained below.
  • Passing through the outer disc 20 are locking pins 23.
  • the discs 20 and 22 may be locked together by an extension 23c of the locking pins 23 (as shown on figure 7) or by a positive or friction clutch between the two parts of the disc assembly (not shown).
  • the locking pins 23 are spring mounted (not shown) such that they will adopt only a fully raised or fully lowered position and are interconnected such that depressing or raising one locking pin will in turn depress or raise the other (mechanism not shown).
  • a locking plate 28a When it is required to change the pitch of a hydrofoil, for example when the hydrofoil passes round the end wheel 15, a locking plate 28a is positioned adjacent the endless track in the region where the hydrofoils approach the end wheel 15. When the hydrofoil assembly is moved past the said locking plate 28a a locking pin 23 will be depressed (from position 23a to position 23b in figure 7). Two such locking pins 23 are provided on each pair of discs such that one of the pins 23 will be depressed by a locking plate 28a whatever the original orientation of the hydrofoil.
  • Depressing a locking pin 23 releases the lock between the two discs, either by disengaging the locking pin extensions 23c from a toothed wheel 29 (see figure 7) or by the alternative arrangement of disengaging a clutch between the two discs.
  • Coil springs 25 between the discs 20 and 22 then move the hydrofoil and disc 20 to a zero pitch orientation.
  • the alternative pitch control lever 24a is displaced so that it cannot engage with the left hand pitch control stud 23 and the locking plate 28c is displaced such that it cannot interfere with the movement of the hydrofoil.
  • pitch control lever 24a is set to the required negative pitch, and is moved such that it will engage with the left hand stud 23. Pitch control lever 24a pushes the hydrofoil assembly to the required negative pitch. Locking plate 28c is moved to a position where it can engage with a locking pin 23 and a locking pin 23 is then raised by locking plate 28c (from position 23b to position 23a on figure 7) to lock the hydrofoil assembly at this pitch angle. In this case, pitch control lever 24 is displaced so that it cannot engage with the right hand pitch control stud and the locking plate 28b is displaced such that it cannot interfere with the movement of the hydrofoil.
  • figure 7 depicts the outer disc 20 and inner disc 22 showing the hydrofoil 14 and preferred positions of the locking pins 23 and pitch control studs 26.
  • Figure 7b is a cross-section along AA wherein the hydrofoil assembly is moving from left to right such that the raised locking pin 23a is about to be depressed by the locking plates 28a to allow the pitch angle of the hydrofoil to be changed.
  • Figure 7c is a cross-section along BB showing the locking pins 23a engaged with the toothed wheel 29.
  • Figure 7d is a cross-section along AA wherein the hydrofoil assembly is moving from left to right such that the lowered locking pin 23b is about to be lifted by the locking plates 28b locking the hydrofoil at a new pitch angle
  • Figure 7d shows a cross-section along BB of the same situation, wherein the locking pins 23b are not engaged with the toothed wheel 29.
  • Figure 7f shows further details of the said locking pin and toothed wheel.
  • FIG 8 shows a hydrofoil 14 attached to a track 13 moving in an anticlockwise direction around end wheels 15 where the hydrofoil 14 has just passed round the starboard end wheel 15.
  • the hydrofoils 14 are provided with a cranked lever 30 that has a guide pin 31 at one end.
  • the hydrofoils 14 are pivotally mounted at the pivot region 32 of the cranked lever 30 in journal bearings 34 in one of the tracks 13.
  • the hydrofoil could have a similar cranked lever mounted at its other end. In this latter case the other end of the hydrofoil would be mounted in journal bearings in the other track 13 (only one such mechanism will be described for simplicity).
  • the pitch change mechanism further comprises two fixed guide rails 33 that run alongside each run of the respective track 13 (only one such pair of rails 33 is shown in Figure 8a).
  • the distance of the rails 33 from the track 13 and the angle that the guide rails make to the run of the track 13 is set to achieve the desired pitch angle. If the guide rails run parallel to the run of the track 13 and the guide rails are close to the track 13 as shown in Figure 8b then the pitch angle will be shallow. If the guide rails 33 are parallel to the track 13 and spaced further away from the track 13 (as shown in Figure 8c) the pitch of the hydrofoils 14 is increased.
  • the hydrofoils 14 are set to have a positive pitch angle. Whereas, if the guide rails are placed above the top run of the track 13 as shown in Figure 8d the pitch angle will be set negative (or the reverse of that shown in
  • the guide rails 33 are installed in fixed positions relative to the tracks 13 to produce predetermined pitch angles, if desired they could be moved bodily relative to the track 13 in a controlled manner to vary the angle of attack collectively. In this way it would be possible to achieve, selectively, the different pitch angles as shown in any of Figures 8a to 8e.
  • FIG. 9 there is shown schematically a rotatable support 36 that is positioned alongside long runs of the track 13.
  • the support 36 is fixed relative to the track run and rotates about its longitudinal axis 37.
  • the perimeter of the support engages the sides of the track 13 to prevent the track 13 being deflected too far away from the path 38 of a non-loaded track 13 (shown dotted) by the thrust generated on the hydrofoils 14.
  • the support 36 may also be a means of transferring thrust from the hydrofoils to the vessel.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Wind Motors (AREA)

Abstract

Cette invention concerne un dispositif de propulsion (10) constitué d'une ou plusieurs ailes immergées (14) montées sur des chenilles (13) et conçues pour effectuer un mouvement non rotatif dans l'eau dans une direction orthogonale par rapport à l'axe longitudinal du navire. Les ailes immergées (14) se présentent à l'eau selon un angle d'attaque donné de manière à générer une poussée dans la direction de déplacement requise du navire.
PCT/GB2004/004734 2003-11-11 2004-11-10 Systeme de propulsion pour navires WO2005047100A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0326251A GB0326251D0 (en) 2003-11-11 2003-11-11 A propulsion system for marine vessels
GB0326251.6 2003-11-11

Publications (1)

Publication Number Publication Date
WO2005047100A1 true WO2005047100A1 (fr) 2005-05-26

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ID=29726313

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PCT/GB2004/004734 WO2005047100A1 (fr) 2003-11-11 2004-11-10 Systeme de propulsion pour navires

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GB (1) GB0326251D0 (fr)
WO (1) WO2005047100A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2898580A1 (fr) * 2006-03-14 2007-09-21 Alain Pyre Propulsion de vehicules evoluant sur l'eau et/ou dans l'eau, au moyen d'une ou plusieurs ailes immergees, animees de mouvements transversaux par rapport a la trajectoire du vehicule.
ES2343301A1 (es) * 2009-12-30 2010-07-27 Miguel Huguet Casali Sistema de propulsion multidireccional para buques con transformador mecanico hipocicloide.
CN102371861A (zh) * 2010-08-25 2012-03-14 财团法人工业技术研究院 推进装置及其控制方法
WO2013188285A1 (fr) * 2012-06-11 2013-12-19 Vetter James W Véhicule à orientations multiples, à agilité verticale perfectionnée et à environnement variable
WO2014154024A1 (fr) * 2013-03-26 2014-10-02 Meng Jie Système porteur utilisant un procédé de propulsion basé sur des ailes à réaction
RU2623422C1 (ru) * 2016-04-27 2017-06-26 Владимир Александрович Пронин Ленточно-лопастное устройство для получения потока
WO2018073493A1 (fr) * 2016-10-17 2018-04-26 Teknologian Tutkimuskeskus Vtt Oy Dispositif de transformation d'énergie et procédé de transformation d'énergie

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1988010207A1 (fr) * 1987-06-26 1988-12-29 Avan Marine Limited Helices
US6435827B1 (en) * 2000-10-27 2002-08-20 James Steiner Apparatus for generating a fluid flow

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1988010207A1 (fr) * 1987-06-26 1988-12-29 Avan Marine Limited Helices
US6435827B1 (en) * 2000-10-27 2002-08-20 James Steiner Apparatus for generating a fluid flow

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2898580A1 (fr) * 2006-03-14 2007-09-21 Alain Pyre Propulsion de vehicules evoluant sur l'eau et/ou dans l'eau, au moyen d'une ou plusieurs ailes immergees, animees de mouvements transversaux par rapport a la trajectoire du vehicule.
WO2011064420A2 (fr) 2009-10-30 2011-06-03 Miguel Huguet Casali Système de propulsion multidirectionnel pour navires à transformateur mécanique hypocycloïde
WO2011064420A3 (fr) * 2009-10-30 2011-09-29 Miguel Huguet Casali Système de propulsion multidirectionnel pour navires à transformateur mécanique hypocycloïde
ES2343301A1 (es) * 2009-12-30 2010-07-27 Miguel Huguet Casali Sistema de propulsion multidireccional para buques con transformador mecanico hipocicloide.
CN102371861A (zh) * 2010-08-25 2012-03-14 财团法人工业技术研究院 推进装置及其控制方法
US9580171B2 (en) 2012-06-11 2017-02-28 James W Vetter Multi-orientation, advanced vertical agility, variable-environment vehicle
US9061762B2 (en) 2012-06-11 2015-06-23 James W Vetter Multi-orientation, advanced vertical agility, variable-environment vehicle
US9315266B2 (en) 2012-06-11 2016-04-19 James W Vetter Multi-orientation, advanced vertical agility, variable-environment vehicle
WO2013188285A1 (fr) * 2012-06-11 2013-12-19 Vetter James W Véhicule à orientations multiples, à agilité verticale perfectionnée et à environnement variable
WO2014154024A1 (fr) * 2013-03-26 2014-10-02 Meng Jie Système porteur utilisant un procédé de propulsion basé sur des ailes à réaction
RU2623422C1 (ru) * 2016-04-27 2017-06-26 Владимир Александрович Пронин Ленточно-лопастное устройство для получения потока
WO2018073493A1 (fr) * 2016-10-17 2018-04-26 Teknologian Tutkimuskeskus Vtt Oy Dispositif de transformation d'énergie et procédé de transformation d'énergie
US11479330B2 (en) 2016-10-17 2022-10-25 Teknologian Tutkimuskeskus Vtt Oy Energy transforming device and method of transforming energy

Also Published As

Publication number Publication date
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