WO2005021372A1 - Marine propulsion/steering system comprising single propeller shaft driven with two engines - Google Patents

Marine propulsion/steering system comprising single propeller shaft driven with two engines Download PDF

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Publication number
WO2005021372A1
WO2005021372A1 PCT/HR2003/000046 HR0300046W WO2005021372A1 WO 2005021372 A1 WO2005021372 A1 WO 2005021372A1 HR 0300046 W HR0300046 W HR 0300046W WO 2005021372 A1 WO2005021372 A1 WO 2005021372A1
Authority
WO
WIPO (PCT)
Prior art keywords
installation
pulling
propeller shaft
variable pitch
steering
Prior art date
Application number
PCT/HR2003/000046
Other languages
French (fr)
Inventor
Nenad Fles
Original Assignee
Nenad Fles
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 Nenad Fles filed Critical Nenad Fles
Priority to PCT/HR2003/000046 priority Critical patent/WO2005021372A1/en
Priority to AU2003263374A priority patent/AU2003263374A1/en
Publication of WO2005021372A1 publication Critical patent/WO2005021372A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H5/00—Arrangements on vessels of propulsion elements directly acting on water
    • B63H5/07—Arrangements on vessels of propulsion elements directly acting on water of propellers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B3/00—Hulls characterised by their structure or component parts
    • B63B3/14—Hull parts
    • B63B3/42—Shaft brackets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H23/00—Transmitting power from propulsion power plant to propulsive elements
    • B63H23/02—Transmitting power from propulsion power plant to propulsive elements with mechanical gearing
    • B63H23/10—Transmitting power from propulsion power plant to propulsive elements with mechanical gearing for transmitting drive from more than one propulsion power unit
    • B63H23/12—Transmitting power from propulsion power plant to propulsive elements with mechanical gearing for transmitting drive from more than one propulsion power unit allowing combined use of the propulsion power units
    • B63H23/14—Transmitting power from propulsion power plant to propulsive elements with mechanical gearing for transmitting drive from more than one propulsion power unit allowing combined use of the propulsion power units with unidirectional drive or where reversal is immaterial
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H5/00—Arrangements on vessels of propulsion elements directly acting on water
    • B63H5/07—Arrangements on vessels of propulsion elements directly acting on water of propellers
    • B63H2005/075—Arrangements on vessels of propulsion elements directly acting on water of propellers using non-azimuthing podded propulsor units, i.e. podded units without means for rotation about a vertical axis, e.g. rigidly connected to the hull
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H5/00—Arrangements on vessels of propulsion elements directly acting on water
    • B63H5/07—Arrangements on vessels of propulsion elements directly acting on water of propellers
    • B63H5/08—Arrangements on vessels of propulsion elements directly acting on water of propellers of more than one propeller
    • B63H5/10—Arrangements on vessels of propulsion elements directly acting on water of propellers of more than one propeller of coaxial type, e.g. of counter-rotative type

Definitions

  • the invention relates to a marine propulsion / steering system particularly relates to category of propulsion units fitted on strut underneath ship's hull.
  • BACKGROUND ART According to common practice these units are of 360 deg. rotatable execution and usually arranged in pairs at the stern of the vessels entitled for high manoeuvring performances such as offshore support vessels, tugs, car and passenger ferries operating frequently in congested ports and similar.
  • vessel sizes and types which could benefit from the strut concept although exceptional manoeuvrability for such vessels is not priority.
  • installation of pair of complex, vulnerable and expensive rotatable thrusters on vessels with operational profile comprising long distance runs with very rare calls at ports cannot be justified in terms of initial and maintenance costs.
  • Invented arrangement shown on Fig 1. comprises lower body (1) of streamlined form with pulling propeller (2) fitted on V-shaped struts (3). At the rear end of lower body (1) a rudder pintle or bearing (4) is fitted. Upper ends of V - struts (3) penetrate vessel's shell and terminate with upper gear boxes (5) each comprising horizontal input shaft (6), clutch (7) and pair of bevel gears (8). Each strut (3) embodies one shaft (9) with the bevel gear (10) at the lower end, both bevel gears being engaged with gear (11) coupled to propeller shaft (15).
  • Base plate (12) is common for both struts (3) and for steering gear (13) with upper rudder stock bearing and seals.
  • Well spaced inclined struts are very rigid against side forces produced by rudder declination and effectively substitute for conventional rudder carrier (horn).
  • horizontal distance between upper gears' input shafts (6) should at least correspond to engine manufacturers recommendation for twin engine installations.
  • Prime movers (14) are, basically, four-stroke non-reversible medium speed diesel engines. The said invention is aimed to combine, in mechanically simple and sturdy construction, advantages of high efficiency contra-rotating propellers with well known benefits of a controllable pitch propellers and yet providing a certain degree of redundancy.

Abstract

The invention is aimed to substitute ship propulsion installation comprising two complex rotatable (steerable) thrusters with simpler, stronger and cheaper system having equal or better propulsive efficiency in such cases when vessel’s maneuverability is not of the utmost priority for the envisaged operational profile. If compared with slow speed single engine, coupled to contrarotating propellers with concentric shafts fitted in the stern tube, installation is superior in terms of load control, thrust reversing, redundancy, low NOx emission, shorter engine room and less resistance/higher speed due to simple pram-type aft body. The system comprises two upper gear boxes (5) with inputs from main engines (14), vertical shafts (9) within V-oriented struts (3) driving propeller shaft(s) (15) and propeller(s) (2) in (contra-rotating) pulling mode. Steering gear (13), bearings and sealings are integrated in common base plate (12) aligned to ship’s shell. Complete integration of gear boxes, propelling and steering functions into one single source product is aimed to reduce manufacturing and installation costs.

Description

MARINE PROPULSION / STEERING SYSTEM COMPRISING SINGLE PROPELLER SHAFT DRIVEN WITH TWO ENGINES
TECHNICAL FIELD
The invention relates to a marine propulsion / steering system particularly relates to category of propulsion units fitted on strut underneath ship's hull. BACKGROUND ART According to common practice these units are of 360 deg. rotatable execution and usually arranged in pairs at the stern of the vessels entitled for high manoeuvring performances such as offshore support vessels, tugs, car and passenger ferries operating frequently in congested ports and similar. However, there is a wide choice of vessel sizes and types which could benefit from the strut concept although exceptional manoeuvrability for such vessels is not priority. In other word, installation of pair of complex, vulnerable and expensive rotatable thrusters on vessels with operational profile comprising long distance runs with very rare calls at ports cannot be justified in terms of initial and maintenance costs. DISCLOSURE OF THE INVENTION
The intention of the invention is to substitute complex, vulnerable and expensive pair of rotatable (steerable) thrusters with less sophisticated and cheaper solution, without sacrificing propulsive efficiency at design speed. Invented arrangement shown on Fig 1. comprises lower body (1) of streamlined form with pulling propeller (2) fitted on V-shaped struts (3). At the rear end of lower body (1) a rudder pintle or bearing (4) is fitted. Upper ends of V - struts (3) penetrate vessel's shell and terminate with upper gear boxes (5) each comprising horizontal input shaft (6), clutch (7) and pair of bevel gears (8). Each strut (3) embodies one shaft (9) with the bevel gear (10) at the lower end, both bevel gears being engaged with gear (11) coupled to propeller shaft (15). Described arrangement implies use of simple, low resistance, pram-type aft body sections having buttock angles of abt 15- 17 deg. to the base line at the position of patented system. Base plate (12) is common for both struts (3) and for steering gear (13) with upper rudder stock bearing and seals. Well spaced inclined struts are very rigid against side forces produced by rudder declination and effectively substitute for conventional rudder carrier (horn). As a rule, horizontal distance between upper gears' input shafts (6) should at least correspond to engine manufacturers recommendation for twin engine installations. Prime movers (14) are, basically, four-stroke non-reversible medium speed diesel engines. The said invention is aimed to combine, in mechanically simple and sturdy construction, advantages of high efficiency contra-rotating propellers with well known benefits of a controllable pitch propellers and yet providing a certain degree of redundancy.

Claims

CLAIM
1. Patent is requested for marine propulsion / steering system featured with two V-aligned struts (3) carrying streamlined body (1) with one pulling variable pitch propeller (2) at the fore end and ruudder pintle bearing (4) at the aft end having common base plate (12) aligned with, in principle, pram- type stern of the vessel and comprising integrated upper gear boxes (5) with bevel gears (8) and clutches (7) and steering gear (13) with upper rudder stock bearing / sealings, the system being therefore suitable for use of two four-stroke non-reversible medium speed engines (14) as prime movers, any one of which can be disconnected while other is running at desired rating and rpm (redundant propulsion) without possibility of being overloaded.(Fig. l)
2. A unit as set forth in claim 1 but with two contra rotating variable pitch pulling propellers instead of one pulling variable pitch propeller. (Fig.2)
PCT/HR2003/000046 2003-09-01 2003-09-01 Marine propulsion/steering system comprising single propeller shaft driven with two engines WO2005021372A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/HR2003/000046 WO2005021372A1 (en) 2003-09-01 2003-09-01 Marine propulsion/steering system comprising single propeller shaft driven with two engines
AU2003263374A AU2003263374A1 (en) 2003-09-01 2003-09-01 Marine propulsion/steering system comprising single propeller shaft driven with two engines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/HR2003/000046 WO2005021372A1 (en) 2003-09-01 2003-09-01 Marine propulsion/steering system comprising single propeller shaft driven with two engines

Publications (1)

Publication Number Publication Date
WO2005021372A1 true WO2005021372A1 (en) 2005-03-10

Family

ID=34259861

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/HR2003/000046 WO2005021372A1 (en) 2003-09-01 2003-09-01 Marine propulsion/steering system comprising single propeller shaft driven with two engines

Country Status (2)

Country Link
AU (1) AU2003263374A1 (en)
WO (1) WO2005021372A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2626290A1 (en) * 2012-02-09 2013-08-14 ABB Oy Propulsion arrangement in a ship
US11208190B1 (en) 2020-06-23 2021-12-28 Brunswick Corporation Stern drives having breakaway lower gearcase

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1679388A (en) * 1926-08-24 1928-08-07 Marine Equipment & Supply Comp Propeller-shaft strut
US3437069A (en) * 1966-10-05 1969-04-08 Charles H Bennett Boat construction
US5232386A (en) * 1992-12-10 1993-08-03 Gifford William J Counter rotating strut drive
US5439403A (en) * 1994-02-28 1995-08-08 Rolla; Philip M. Marine tractor surface drive system
WO1997011878A1 (en) * 1995-09-29 1997-04-03 Wärtsilä Nsd Norway As Propulsion and steering unit for a vessel

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1679388A (en) * 1926-08-24 1928-08-07 Marine Equipment & Supply Comp Propeller-shaft strut
US3437069A (en) * 1966-10-05 1969-04-08 Charles H Bennett Boat construction
US5232386A (en) * 1992-12-10 1993-08-03 Gifford William J Counter rotating strut drive
US5439403A (en) * 1994-02-28 1995-08-08 Rolla; Philip M. Marine tractor surface drive system
WO1997011878A1 (en) * 1995-09-29 1997-04-03 Wärtsilä Nsd Norway As Propulsion and steering unit for a vessel

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2626290A1 (en) * 2012-02-09 2013-08-14 ABB Oy Propulsion arrangement in a ship
US11208190B1 (en) 2020-06-23 2021-12-28 Brunswick Corporation Stern drives having breakaway lower gearcase

Also Published As

Publication number Publication date
AU2003263374A1 (en) 2005-03-16

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