US20090304510A1 - Marine propulsion and constructional details thereof - Google Patents

Marine propulsion and constructional details thereof Download PDF

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Publication number
US20090304510A1
US20090304510A1 US12/441,516 US44151607A US2009304510A1 US 20090304510 A1 US20090304510 A1 US 20090304510A1 US 44151607 A US44151607 A US 44151607A US 2009304510 A1 US2009304510 A1 US 2009304510A1
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United States
Prior art keywords
fin
axis
dihedral
pitch
propeller
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Abandoned
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US12/441,516
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English (en)
Inventor
Ian James Duncan
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yellowfin Ltd
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Yellowfin Ltd
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Filing date
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Assigned to YELLOWFIN LIMITED reassignment YELLOWFIN LIMITED ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: DUNCAN, IAN JAMES
Publication of US20090304510A1 publication Critical patent/US20090304510A1/en
Abandoned legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H25/00—Steering; Slowing-down otherwise than by use of propulsive elements; Dynamic anchoring, i.e. positioning vessels by means of main or auxiliary propulsive elements
    • B63H25/42—Steering or dynamic anchoring by propulsive elements; Steering or dynamic anchoring by propellers used therefor only; Steering or dynamic anchoring by rudders carrying propellers

Definitions

  • the present invention relates to marine propulsion systems and to methods of providing controlled moments about the yaw, pitch and roll axes of a craft independently whilst also providing controlled thrust forces in the axial and transverse senses.
  • the invention also covers a propeller, a fin or blade for a marine propulsion systems and methods of providing dihedral control and folding, including mechanisms for controlling the pitch and dihedral (as defined below) of the fins on the propellers.
  • a craft to which devices including these new inventions are fitted will preferentially be provided with a propulsion management system.
  • Rake Rotation of a fin about an axis located in the root of the fin and which is in or parallel to the plane of rotation of the propeller hub
  • the centre of pressure of the fin is preferably located at a distance of between 50% and 60% of the working surface span from the root section.
  • the hub of the propeller may be contained wholly within the hull profile when viewed from the front.
  • the two cooperating sections preferably define a plurality of recesses into each of which a fin assembly can be inserted, thereby forming a propeller.
  • the marine drive system radially deflects an arcuate portion of the resilient mounting into a corresponding arcuate portion of the gap.
  • the means for controlling the dihedral angle of each fin comprises:
  • a dihedral shuttle moveable, by means of a dihedral actuator, along an axis coaxial with the axis of the hub;
  • a dihedral shuttle moveable, by means of a dihedral actuator, along an axis coaxial with the axis of the hub;
  • the propulsion assembly further comprises means for controlling the pitch angle of each fin.
  • FIG. 4 Side view of a propulsor fin arranged for controllable pitch and dihedral
  • FIG. 12 Detail cross-section of a turret assembly with fin, together with bearing arrangements
  • FIG. 15 Detail of the pitch and dihedral mechanism from inside the hub with 90 degrees pitch and 0 degrees of dihedral
  • FIG. 23 Detail of the pitch and dihedral mechanism from the side. Pitch set to 90 degrees and 0 degrees of dihedral
  • FIG. 37 Isometric view of a raked propeller
  • FIG. 70 Typical mounting transmission factor
  • FIG. 78 Detail of propeller arranged for cyclical pitch, rake and dihedral
  • FIG. 79 Isometric view of propeller arranged for cyclical pitch, rake and dihedral
  • twist is normally below 20 degrees and preferentially in the range 12 degrees to 16 degrees.
  • the stacking axis 320 is shown having an offset 3202 from axis BB and inclined at an angle 3203 relative to the pitch axis AA. Such an offset may be used to reduce the centripetal moment exerted by fin 3 about axis BB when the fin is in its normal range of dihedral angle inclined anticlockwise about axis BB by 5 degrees to 35 degrees.
  • the trailing edge thickness 324 reduces from 3242 at the root to 3241 (see FIG. 2 ) at the tip.
  • the preferred embodiment has a trailing edge normal to the dihedral axis BB to simplify manufacture and metrology, the trailing edge may be skewed positively or negatively through angle ⁇ as desired.
  • FIG. 17 shows a detail of the pitch and dihedral control mechanisms viewed from within the propeller hub 101 (not shown) in which the pitch angle is set to 90 degrees such that the dihedral axis BB is set transversely and the fin is folded.
  • FIG. 19 shows a single dimensional force diagram for a case similar to that shown in FIG. 18 , but in which a small dihedral angle has been added.
  • the force 13 represents the in-plane force generated in the dihedral link 13 ( FIG. 18 )
  • force 241 represents the in-plane force generated in the axis of the dihedral lever 241 ( FIG. 18)
  • 14 represents the in-plane force generated in link 14 ( FIG. 18 ).
  • propeller blades may be cut down from some maximum length such that even finer adjustment of the propeller to the power to be transmitted and the performance required may be achieved.
  • FIG. 32 shows a rear view of an improved hub 101 for a surface-piercing propeller 1 having a broadly polygonal shape at larger swept diameters blending into a generally swept surface at smaller radii.
  • the polygonal surfaces create partial cavities as they rotate such that only a small part of the surface of the propeller hub is in contact with the water.
  • the root sections of the fins 3 blend into the turret profiles. Due to their generally smooth form they generate only modest churning and the losses are further reduced by the fact that they do not create a continuous ring such that each will tend to operate in the cavity created by its predecessors.
  • FIG. 45 is an isometric view the propeller of FIG. 44
  • FIG. 48 shows a side view of a propeller 1 of the same configuration as FIG. 46 from which it will be evident that there will be a large difference in the pitch angle as the propeller rotates. This would have a very negative influence on performance.
  • FIG. 49 shows a front view of a propeller 1 comprising four fins 3
  • the tilt angle of the propeller may be varied about an axis BB normal to axis CC, the axis of rotation of the propeller (see FIG. 67 ).
  • the pitch of each fin may be varied by rotation about an axis AA.
  • the propeller tips rotate through circle 151
  • the propeller roots rotate through circle 152 .
  • Fins 3 are pitched at an angle of 90 degrees about axis AA and the propeller has a swash angle of 0 degrees about axis BB
  • FIG. 52 is an isometric view the propeller of FIG. 51
  • FIG. 54 shows a control block schematic to change port and starboard pitch and engine speed in response to the pilot's movement of the ahead/astern variable control and a helm, and in response to craft roll, pitch and yaw rate sensors or from appropriate signals from an inertial measurement unit or an inertial navigation system.
  • a resilient moulding 831 is inserted into an outer housing 832 and pushed onto the aft gear casing 512 to which a retainer 837 has been loosely placed.
  • its interior profile Prior to pushing the resilient moulding 831 onto the gearcasing 512 its interior profile is substantially smaller than the corresponding profile of the gearcase.
  • the act of pushing the moulding into position creates a substantial pre-compression of the mount which ensures that suffient sealing pressure is maintained between the resilient moulding 831 and both the outer housing 832 and the gearcasing 512 under all conditions.
  • a plastic ring 5121 (see FIG. 61 ) is preferentially bonded onto the end of the aft gearcasing 512 to prevent corrosion.
  • the transom plate 611 is preferentially manufactured from a plastic material.
  • the outer housing 832 preferentially has a forward internal lip 8321 and a rear internal lip 832 which serve to prevent the resilient mount from sliding due to axial forces, especially once it has been pre-compressed. It also comprises an external O-ring and groove 834 or other means of ensuring a static seal between it and the transom plate 611
  • the rate of the mount at this condition will be determined by the radially thicker main body of the mount 8312 , wherein ‘rate’ is taken to mean the local slope of the load/deflection curve at load applied to the mount.
  • This alternative arrangement can simplify assembly of the aft gear casing into the mount.
  • FIG. 64 shows a top view of a unitary propulsion package comprising a propeller 1 , close-coupled to a gearbox 5 and an engine 8 .
  • the unit is mounted to the hull stringers 601 (not shown) on two front mounts 81 (not shown) and to the transom 604 (not shown) by a rear mount 83 .
  • the engine is preferentially fitted with a ladder frame or structural sump 82 (not shown).
  • FIG. 76 shows a sectional view of a turret assembly 2 0 arranged for variable rake comprising a fin carrier 270 for mounting a fin 3 (not shown) comprising a fir-tree root (not shown),
  • the fin carrier is spherically jointed in a spherical cup 276 forming part of the yoke 203 .
  • the fin is raked by axial movement of the rake lever 290 .
  • Axial movement of lever 271 allows the fin to be controlled in pitch.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
US12/441,516 2006-09-15 2007-09-14 Marine propulsion and constructional details thereof Abandoned US20090304510A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP06120796.5 2006-09-15
EP06120796A EP1900634A1 (fr) 2006-09-15 2006-09-15 Propulsion pour bateau et ses détails de construction
PCT/GB2007/050547 WO2008032121A2 (fr) 2006-09-15 2007-09-14 Propulsion marine et ses détails de construction

Publications (1)

Publication Number Publication Date
US20090304510A1 true US20090304510A1 (en) 2009-12-10

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US12/441,516 Abandoned US20090304510A1 (en) 2006-09-15 2007-09-14 Marine propulsion and constructional details thereof

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US (1) US20090304510A1 (fr)
EP (2) EP1900634A1 (fr)
WO (1) WO2008032121A2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114245786A (zh) * 2019-09-23 2022-03-25 沃尔沃遍达公司 用于船舶的螺旋桨
CN114799736A (zh) * 2021-06-16 2022-07-29 江南重工有限公司 一种调距桨前后活塞杆加工方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT512142B1 (de) * 2011-09-19 2017-04-15 Hubert Holesz Ing Propeller, insbesondere schiffsschraube
US10041367B2 (en) 2013-12-12 2018-08-07 General Electric Company Axially faced seal system

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1802648A (en) * 1925-12-31 1931-04-28 American Propeller Company Propeller
US1981392A (en) * 1932-12-03 1934-11-20 Manganese Bronze & Brass Compa Propeller and the like
US2532371A (en) * 1946-07-19 1950-12-05 Werner H Petersen Feathering reversible propeller
US5733156A (en) * 1994-12-21 1998-03-31 Honda Giken Kogyo Kabushiki Kaisha Variable propeller for boat

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GB594396A (en) * 1940-10-17 1947-11-11 United Aircraft Corp Improvements in or relating to blade adjusting means for controllable pitch propellers
GB576364A (en) * 1942-12-28 1946-04-01 United Aircraft Corp Improvements in or relating to direct lift aircraft
US2626766A (en) * 1947-09-09 1953-01-27 Firestone Tire & Rubber Co Rotor arrangement for singlerotor helicopters
GB807423A (en) * 1956-02-08 1959-01-14 Fairey Aviat Co Ltd Improvements relating to helicopters
US3101066A (en) * 1961-07-14 1963-08-20 Frederick R Haselton Submarine hydrodynamic control system
US3589835A (en) * 1969-07-17 1971-06-29 United Aircraft Corp Variable stiffness rotor
US3709187A (en) * 1970-07-22 1973-01-09 A Marco Propulsion and control system for motorboat
US4092084A (en) * 1976-07-22 1978-05-30 The South African Inventions Development Corporation Of Scientia Rotor for an autogiro
US4131391A (en) * 1976-10-04 1978-12-26 Robinson Helicopter Co. Rotor hub and oil seal
US4125039A (en) 1976-10-18 1978-11-14 Caterpillar Tractor Co. Engine and transmission control system
US4186829A (en) 1977-11-14 1980-02-05 Twin Disc, Incorporated Modulatable power transmission clutch
US4957413A (en) * 1986-04-28 1990-09-18 The United States Of America As Represented By The Secretary Of The Navy Omnidirectional variable thrust propeller
US5028210A (en) * 1990-01-05 1991-07-02 The United States Of America As Represented By The Secretary Of The Navy Propeller unit with controlled cyclic and collective blade pitch
US5249992A (en) * 1992-12-30 1993-10-05 The United States Of America As Represented By The Secretary Of The Navy Marine propulsion unit with controlled cyclic and collective blade pitch
US5992599A (en) 1996-12-30 1999-11-30 Ab Volvo Penta Control system for intermittently pulsing a valve controlling forward and reverse clutches a transmission and transmission fitted therewith
GB9802570D0 (en) 1998-02-07 1998-04-01 Duncan Ian J Propulsion system
DE19856305A1 (de) 1998-12-07 2000-06-08 Dirk Buechler Schiffsantrieb
WO2001047770A1 (fr) * 1999-12-28 2001-07-05 Fles Nenad Helice a pas variable partiellement submergee montee sur une traverse profilee
SE516426C2 (sv) 2000-05-09 2002-01-15 Torbjoern Eriksson Skrov- och propelleranordning
DE10035480A1 (de) 2000-07-21 2002-01-31 Zahnradfabrik Friedrichshafen Schiffsgetriebe mit Heizvorrichtung
US6443286B1 (en) 2001-01-18 2002-09-03 Twin Disc, Incorporated Modulatable power transmission clutch and a marine transmission
US6666312B2 (en) 2002-04-24 2003-12-23 Twin Disc, Incorporated Modulatable power transmission clutch and a marine transmission

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1802648A (en) * 1925-12-31 1931-04-28 American Propeller Company Propeller
US1981392A (en) * 1932-12-03 1934-11-20 Manganese Bronze & Brass Compa Propeller and the like
US2532371A (en) * 1946-07-19 1950-12-05 Werner H Petersen Feathering reversible propeller
US5733156A (en) * 1994-12-21 1998-03-31 Honda Giken Kogyo Kabushiki Kaisha Variable propeller for boat

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114245786A (zh) * 2019-09-23 2022-03-25 沃尔沃遍达公司 用于船舶的螺旋桨
CN114799736A (zh) * 2021-06-16 2022-07-29 江南重工有限公司 一种调距桨前后活塞杆加工方法

Also Published As

Publication number Publication date
EP2069197A2 (fr) 2009-06-17
WO2008032121A3 (fr) 2009-05-22
WO2008032121A2 (fr) 2008-03-20
EP1900634A1 (fr) 2008-03-19

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AS Assignment

Owner name: YELLOWFIN LIMITED, UNITED KINGDOM

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:DUNCAN, IAN JAMES;REEL/FRAME:023095/0431

Effective date: 20090320

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION