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EP2993120A1 - Agencement de propulsion pour navire - Google Patents

Agencement de propulsion pour navire Download PDF

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Publication number
EP2993120A1
EP2993120A1 EP14183406.9A EP14183406A EP2993120A1 EP 2993120 A1 EP2993120 A1 EP 2993120A1 EP 14183406 A EP14183406 A EP 14183406A EP 2993120 A1 EP2993120 A1 EP 2993120A1
Authority
EP
European Patent Office
Prior art keywords
blade
blades
propulsion arrangement
flanges
ship propulsion
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Withdrawn
Application number
EP14183406.9A
Other languages
German (de)
English (en)
Inventor
Kimmo KOKKILA
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.)
ABB Oy
Original Assignee
ABB Oy
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 ABB Oy filed Critical ABB Oy
Priority to EP14183406.9A priority Critical patent/EP2993120A1/fr
Publication of EP2993120A1 publication Critical patent/EP2993120A1/fr
Withdrawn legal-status Critical Current

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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
    • B63H1/12—Propulsive elements directly acting on water of rotary type with rotation axis substantially in propulsive direction
    • B63H1/14—Propellers
    • B63H1/20—Hubs; Blade connections

Definitions

  • the present invention relates to a ship propulsion arrangement.
  • Propellers of certain ships such as ice-going vessels, need to withstand very high loads whereby the blades are typically very thick.
  • propulsion drive train including, e.g., propeller shaft, bearings and housing, needs to withstand a breakage load of one propeller blade.
  • One option to reduce blade breakage load is to increase the number of blades, which results narrower and possibly thinner individual blades.
  • blades Often it is desired, or required by flag authorities, that the blades shall be replaceable.
  • the blades are attached to a propeller hub by means of a so called blade flange.
  • the attachment of a greater number of blade flanges to a propeller hub to meet the replaceability and reduction of blade thickness requirements is strength-wise often not possible.
  • An object of the present invention is to provide a propulsion arrangement so as to alleviate the above disadvantages.
  • the object of the invention is achieved with a propulsion arrangement which is defined in the independent claim.
  • a ship propulsion arrangement comprising a propeller hub, and to the propeller hub detachably attachable blade flanges each carrying an integral blade. At least one of the blade flanges carries at least two, to the blade flange, integrally formed blades.
  • number of blade flanges is two, three or four, preferably two or three, whereby each blade flange covers a great portion of the hub circumference.
  • each blade flange carries two blades.
  • the propulsion arrangement comprises three blade flanges, whereby the number of blades is six. In another embodiment, the number of blade flanges is four.
  • the blades of the same blade flange are arranged overlappingly when seen from an end of the propeller hub. In this way the efficiency or the strength of the propeller hub may be increased.
  • the propeller is attached to an azimuthing propulsion unit.
  • the propeller is attached to an azimuthing podded propulsion unit.
  • the propeller is attached to a pulling propulsion unit.
  • the embodiments relate to a propeller arrangement of a ship.
  • the ship is an ice-going vessel such as an ice-breaker.
  • Figure 1 shows a prior art propeller arrangement seen from the end that is along the rotation axis of the propeller. In the middle of the propeller arrangement there is a hub 102 to which the blade flanges are attached to.
  • each blade flange in Figure 1 there are four blade flanges 104 to 110 each carrying a respective blade 104A to 110A.
  • the blades are integrally formed to the blade flange by casting so that they form an integral inseparable blade flange unit.
  • each flange covers about 90 degrees of a circumference of the hub.
  • the problem with using more flanges, eg. six flanges each covering about 60 degrees of the circumference, would be that the flanges cannot adequately and sufficiently be attached to the hub, for example, with bolts, to withstand the high loads caused by, for example, ice blocks hitting the blades.
  • FIG. 2 shows an embodiment of the invention.
  • the blade flange 204 carries two blades 204A, 204B.
  • the blade flanges can be attached to the hub very well. That is, there is sufficiently space on the blade flange to receive a plurality of bolts for fastening the flange to the hub. Also the share of the blade flange of the circumference of the hub is so great that the bolt openings can be distributed over the flange area to obtain maximal fastening of the flange to the hub.
  • the number of blades can be increased compared to prior solutions, whereby their dimensions, for example blade root section thickness and chord length, can also be reduced and therefore the blade breakage load is decreased. This can lead to lower dimensioning load of the whole propulsion drive train and therefore possible more cost and/or efficiency optimised propulsion.
  • the replaceability requirements of blades are met also by this solution of the invention.
  • those blades that share same flange may be manufactured to overlap each other, when looking from behind of the propeller and/or from the blade root sections.
  • the blades are at the same position along the rotation axis of the propeller unit. That is, the blades are in the same plane with each other. The blades may then be arranged non-overlappingly to each other.
  • Figure 2 shows one embodiment of the invention, where the propeller has altogether six blades in three blade flanges. Other embodiments are also possible. There may, for instance, be eight blades in four flanges or four blades in two flanges. The number of blades in flanges can also vary, such that there may be five blades in three flanges where the flanges are of equal size. In a still further embodiment, at least one of the blade flanges may carry three blades.

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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)
EP14183406.9A 2014-09-03 2014-09-03 Agencement de propulsion pour navire Withdrawn EP2993120A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP14183406.9A EP2993120A1 (fr) 2014-09-03 2014-09-03 Agencement de propulsion pour navire

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP14183406.9A EP2993120A1 (fr) 2014-09-03 2014-09-03 Agencement de propulsion pour navire

Publications (1)

Publication Number Publication Date
EP2993120A1 true EP2993120A1 (fr) 2016-03-09

Family

ID=51483265

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14183406.9A Withdrawn EP2993120A1 (fr) 2014-09-03 2014-09-03 Agencement de propulsion pour navire

Country Status (1)

Country Link
EP (1) EP2993120A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2708696C1 (ru) * 2019-04-01 2019-12-11 Общество С Ограниченной Ответственностью "Прикладной Инженерный И Учебный Центр "Сапфир" Гребной винт винто-рулевой колонки водного судна и винто-рулевая колонка с указанным гребным винтом

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3575530A (en) * 1968-09-05 1971-04-20 Clifton W Hall Variable pitch propeller
US4566855A (en) * 1981-08-28 1986-01-28 Costabile John J Shock absorbing clutch assembly for marine propeller
WO2012008901A1 (fr) * 2010-07-12 2012-01-19 Rolls-Royce Aktiebolag Groupe propulseur pour un navire et navire présentant un groupe propulseur
EP2497709A1 (fr) * 2009-11-05 2012-09-12 Pablo Alfonso Gonzalez Abal Dispositif de propulsion d'embarcations

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3575530A (en) * 1968-09-05 1971-04-20 Clifton W Hall Variable pitch propeller
US4566855A (en) * 1981-08-28 1986-01-28 Costabile John J Shock absorbing clutch assembly for marine propeller
EP2497709A1 (fr) * 2009-11-05 2012-09-12 Pablo Alfonso Gonzalez Abal Dispositif de propulsion d'embarcations
WO2012008901A1 (fr) * 2010-07-12 2012-01-19 Rolls-Royce Aktiebolag Groupe propulseur pour un navire et navire présentant un groupe propulseur

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2708696C1 (ru) * 2019-04-01 2019-12-11 Общество С Ограниченной Ответственностью "Прикладной Инженерный И Учебный Центр "Сапфир" Гребной винт винто-рулевой колонки водного судна и винто-рулевая колонка с указанным гребным винтом
EP3718874A1 (fr) 2019-04-01 2020-10-07 Aetc Sapphire Hélice à vis d'un entraînement de nacelle d'un navire et entraînement de nacelle comprenant ladite hélice à vis

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Effective date: 20160910