EP4263343A1 - Hélice marine - Google Patents

Hélice marine

Info

Publication number
EP4263343A1
EP4263343A1 EP21819532.9A EP21819532A EP4263343A1 EP 4263343 A1 EP4263343 A1 EP 4263343A1 EP 21819532 A EP21819532 A EP 21819532A EP 4263343 A1 EP4263343 A1 EP 4263343A1
Authority
EP
European Patent Office
Prior art keywords
propeller
marine
ship
blades
propulsion system
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.)
Pending
Application number
EP21819532.9A
Other languages
German (de)
English (en)
Inventor
Juuso LINDROOS
Ville VALTONEN
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.)
Aker Arctic Technology Inc
Original Assignee
Aker Arctic Technology Inc
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 Aker Arctic Technology Inc filed Critical Aker Arctic Technology Inc
Publication of EP4263343A1 publication Critical patent/EP4263343A1/fr
Pending legal-status Critical Current

Links

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
    • 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
    • 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
    • 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

Definitions

  • the present invention relates to a marine propeller used in the propulsion system of a ship. More precisely the invention relates to the structure of this kind propeller and to a marine propulsion system utilizing this kind of a propeller.
  • the propulsion systems of ships typically in general level comprise one or more engines or motors providing rotational movement and torque, one or more propeller shafts for transferring the rotational movement and torque from the one or more engines to one or more marine propellers, and marine propellers for transferring the rotational movement and torque to thrust for the ship.
  • the marine propellers used in ships comprise typically a propeller hub to which the blades of the propeller are fixed, and via which propeller hub the propeller is fixed to the propeller shaft.
  • the marine propellers can be manufactured as a single piece, i.e. by casting, wherein the hub and blades of the propeller form a solid propeller. This kind of propellers are also called monobloc propellers.
  • the marine propellers can be manufactured in pieces, typically the hub and the individual blades as separate pieces, wherein the blades are fixed to the hub typically with bolts and studs to form an assembled propeller.
  • Monobloc propellers are generally used, but the larger ship propellers cannot be cast in a single casting due to the size of the propeller in relation to the size of the available casting equipment, which generally leads to the use of assembled propeller. Further advantage of the assembled propellers is that individual blades can be changed without removing and changing of the whole propeller when the blades get damaged, which makes them preferable for example for ice-going vessels. This makes the repairing process of the propeller easier and can often be carried out without drydocking the ship.
  • the power of engines used in propulsion systems of ships have been continuously increasing, which have caused the strength requirements of the marine propellers to increase correspondingly.
  • the increased weight of propellers causes increased structural demands and restrictions for the rest of the propulsion system, such as for the diameter of the propeller shaft and for the placement of bearings.
  • the increase of material used in the manufacturing of the propellers also increases the manufacturing, installation, and transportation requirements of the propellers, as well as increases the cost of the propellers.
  • the present invention provides a novel ship propeller, which propeller does not comprise a hub. This allows significant weight savings for the propeller of the invention in comparison to the prior art propellers, thus deceasing the related structural requirements of the propulsion system of the ship and cost of the propeller itself. Further, the propeller of the invention typically comprises less parts than the prior art assembled propellers, which makes it easier to manufacture.
  • the marine propeller of the invention for a propulsion system of a ship comprises a plurality of detachable blades, and is configured to be fixed to a propeller shaft of a propulsion system of a ship, wherein the detachable blades forming the propeller are configured to be fixed to the end surface of the propeller shaft or of a flange formed at the end of the propeller shaft.
  • the blades of the propeller are connected to the propeller shaft preferably directly, which means that the fixing means, such as bolts and preferably also studs for example, extend to the material of the propeller shaft.
  • a ship preferably means a marine vessel of a suitable size to properly allow the utilization of the advantages obtained with the present invention. In practice this means that the ship typically has a length of 24 m or more.
  • the propeller of the invention is preferably a large marine propeller in order to properly allow the utilization of the advantages obtained with the present invention.
  • the diameter of the propeller is 2 m or more, preferably 3 m or more.
  • the material of the propeller is preferably metal, such as bronze or stainless steel for example, but other metal materials may also be used.
  • the propeller comprises a cap connected to the detachable blades of the propeller. This cap allows additional structural support for the blades and for the whole propeller at the side away from the propeller shaft.
  • number of detachable blades is three or more. Preferably the number of detachable blades in a propeller is four, but the number of detachable blades may also be three, five or six.
  • the detachable blades are fixed to the shaft with a fixing system comprising bolts and preferably also studs. This allows the separate blades to be replaced and repaired easily when the need arises without drydocking the ship and without disassembling the whole propeller.
  • the present invention also provides a marine propulsion system for providing propulsion for a ship, which propulsion system comprises at least one engine or motor, a propeller, and a propeller shaft for conveying the rotational power from the at least one engine to the propeller, wherein the propeller is a marine propeller of the invention as defined above.
  • the engine or motor in the propulsion system of the present invention may be any suitable device, system and/or arrangement providing rotative motion and torque for the propeller via the propeller shaft. Examples of these include combustion engine, electrical engine, and turbine.
  • the propulsion system of the invention may also be implemented as a pod-type construction, wherein the propulsion system is located, completely or partially, in a separate pod that can be rotated in relation to the hull of the ship.
  • the system may typically comprises a rope guard.
  • the present invention also provides a ship that comprises a marine propeller according to the invention and/or a marine propulsion system according to the invention.
  • the ship of the invention is preferably an ice class ship, i.e. ship designed to travel in at least some thickness of ice, such as an icebreaker, a Polar Class ship, or an Arctic Class ship for example, wherein the construction of the propeller allows easy repairing of damaged blades.
  • the ship of the invention may be an open-water ship wherein the construction of the propeller of the invention allows manufacture of very large propellers.
  • Figure 1 shows schematically a prior art marine propeller
  • FIGS. 2A and 2B show schematically an embodiment of a marine propeller of the invention
  • FIGS 3A-3D show schematically alternative embodiments of the present invention
  • Figure 4 shows schematically an embodiment of the present invention as exploded view
  • Figure 5 shows schematically an embodiment of a ship utilizing the present invention.
  • the prior art marine propeller 1 shown in figure 1 as a cross-sectional view comprises a plurality of separate blades 2 comprising a fixing portion 2a via which fixing portion the blades are fixed to a propeller hub 3 with bolts.
  • the propeller 1 is fixed to a propeller shaft 4 in with bolts extending through a flange 5 formed at or attached to the end of the propeller shaft and to the hub 3.
  • the propeller 1 also comprises a propeller cap 6 fixed at the opposite end of the propeller in relation to the attachment to the propeller shaft 4, to cover the hollow portion of the propeller hub 3.
  • Figures 2A and 2B show an embodiment of the propeller 10 of the invention, which comprises a plurality, four in this embodiment as can be seen from figure 2B, of separate blades 2 comprising a fixing portion 2a.
  • the blades 2 forming the propeller 10 are connected directly to a flange 5 formed at the end of the propeller shaft 4 via their fixing portions 2a with bolts.
  • a propeller cap 6 At the opposite end of the propeller 10 in relation to the flange 5 of the propeller shaft 4, to the fixing portions 2a of the blades 2 are fixed a propeller cap 6.
  • the propeller cap 6 in this embodiment provides further structural support for the blades 2 of the propeller 10.
  • Figure 2B illustrates the fixing of the fixing portions 2a of the blades 2 to the flange 5 and/or to the propeller cap 6.
  • four blades 2 are fixed via their fixing portions 2a to the flange 5 and to the cap 6 with bolts and studs for forming the propeller 10.
  • FIGS 3A-3D show alternative embodiments of the propeller 10 of the invention attached to the propeller shaft 4 as cross-sectional views.
  • the blades 2 of the propeller 10 are formed so that their fixing portions 2a comprise sections extending radially in relation to the center axis of the propeller shaft 4. These sections of the fixing portions 2a of the blades 2 area for the fixing bolts and holes via which the blades can be attached to the end surface of the flange 5 formed at the end of the propeller shaft 4.
  • This formation of propeller 10 from the blades 2 in this embodiment also creates a hollow area 8 inside the propeller, which hollow area is closed with a cap part 6, which also provides structural strength for the propeller and its blades.
  • the blades 2 forming the propeller 10 are fixed via first end of their fixing portions 2a on the end surface of the flange 5 formed at the end of the propeller shaft 4.
  • a cap part 6 closing the hollow area 8 inside the propeller 10.
  • the fixing portions 2a of the blades 2 extend at an angle in the longitudinal direction of the propeller shaft 4 so that the diameter formed by the fixing portions 2a is greater at the flange 5 than at the cap part 6.
  • the embodiment of figure 3C corresponds substantially to the embodiment of figure 3B, but in this embodiment the fixing portions 2a of the blades 2 extend at an angle in the longitudinal direction of the propeller shaft 4 so that the diameter formed by the fixing portions 2a is smaller at the flange 5 than at the cap part 6.
  • Figure 3D shows an embodiment, there the outer surface of the fixing portions 2a of the blades 2 forming the propeller 10 are formed curved.
  • Figure 4 schematically showing an embodiment of the present invention as an exploded view, further illustrates the construction of the propeller 10 of the invention.
  • four blades 2 via their fixing portions 2a are connected to the end surface of the flange 5 formed at the propeller shaft 4 with bolts 11 and studs 14.
  • This embodiment also substantially corresponds to the embodiment shown in figure 2A.
  • a cap part 6 With bolts 12 and studs 13, The cap part 6 gives further support for the blades 2 of the propeller 10 and also encloses the open space 8 inside the propeller.
  • FIG. 5 shows schematically a ship 20 into which the propeller 10 and propulsion system of the present invention can preferably be applied.
  • the ship 20 is in this embodiment an icebreaker.
  • the propeller may be located at the stern of the ship 20, as shown in figure 5, or the propeller may be located at the bow of the ship, or in the steering propeller of the ship.
  • the propeller 20 of the invention may be an open propeller, as shown in figure 5, or a ducted propeller.

Landscapes

  • 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)

Abstract

La présente invention porte sur une hélice marine (10) pour un système de propulsion d'un navire (20), laquelle hélice comprend une pluralité de lames détachables (2) et laquelle hélice est configurée pour être fixée à un arbre d'hélice (4) d'un système de propulsion d'un navire, les lames détachables (2) formant l'hélice (10) étant configurées pour être fixées à la surface d'extrémité de l'arbre d'hélice (4) ou d'une bride (5) formée à l'extrémité de l'arbre d'hélice. L'invention concerne également un système de propulsion marine et un navire (20) utilisant ce type d'hélice marine (10).
EP21819532.9A 2020-12-18 2021-11-22 Hélice marine Pending EP4263343A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20206333A FI130447B (en) 2020-12-18 2020-12-18 Propeller
PCT/FI2021/050798 WO2022129676A1 (fr) 2020-12-18 2021-11-22 Hélice marine

Publications (1)

Publication Number Publication Date
EP4263343A1 true EP4263343A1 (fr) 2023-10-25

Family

ID=78821645

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21819532.9A Pending EP4263343A1 (fr) 2020-12-18 2021-11-22 Hélice marine

Country Status (7)

Country Link
US (1) US20240051647A1 (fr)
EP (1) EP4263343A1 (fr)
KR (1) KR20230118671A (fr)
CN (1) CN116615374A (fr)
CA (1) CA3203914A1 (fr)
FI (1) FI130447B (fr)
WO (1) WO2022129676A1 (fr)

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191001061A (en) * 1910-01-15 1910-10-06 William Henry Ireland Improvements in and relating to Propellers.
BE790095A (fr) * 1971-10-20 1973-04-13 Mobil Oil Corp Dispositif de support a joint d'etancheite d'arbre d'helice d'un navir
US4150921A (en) * 1977-07-28 1979-04-24 Propulsion Systems, Inc. Built-up marine propellers with adjustable pitch and axially removable blades
ES1071458Y (es) * 2009-11-05 2010-05-27 Abal Pablo Alfonso Gonzalez Dispositivo de propulsion de embarcaciones
SE534771C2 (sv) * 2010-03-17 2011-12-13 Itt Mfg Enterprises Inc Propelleraggregat innefattande ett nav och åtminstone två blad
US9308978B2 (en) * 2012-09-14 2016-04-12 Mehmet Nevres ULGEN Marine propeller having demountable blades
KR20150100016A (ko) * 2014-02-24 2015-09-02 대우조선해양 주식회사 허블리스 프로펠러
US9944372B1 (en) * 2015-09-16 2018-04-17 Bradford C. Stahl Efficient reverse thrusting modular propeller
KR200484377Y1 (ko) * 2016-05-18 2017-08-30 주식회사 지노스 선외기용 초경량 복합재료 프로펠러
TR201714615A2 (tr) * 2017-09-29 2019-04-22 Mehmet Nevres Uelgen Gi̇zleni̇r düşey eksenli̇ pervane terti̇bati
KR20190072370A (ko) * 2017-12-15 2019-06-25 대우조선해양 주식회사 선박용 프로펠러 및 이의 제조방법

Also Published As

Publication number Publication date
CN116615374A (zh) 2023-08-18
KR20230118671A (ko) 2023-08-11
WO2022129676A1 (fr) 2022-06-23
CA3203914A1 (fr) 2022-06-23
FI130447B (en) 2023-09-05
FI20206333A1 (en) 2022-06-19
US20240051647A1 (en) 2024-02-15

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