EP3450299B1 - Propulsion device for multi-shaft ship - Google Patents

Propulsion device for multi-shaft ship Download PDF

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Publication number
EP3450299B1
EP3450299B1 EP16900467.8A EP16900467A EP3450299B1 EP 3450299 B1 EP3450299 B1 EP 3450299B1 EP 16900467 A EP16900467 A EP 16900467A EP 3450299 B1 EP3450299 B1 EP 3450299B1
Authority
EP
European Patent Office
Prior art keywords
propeller
appendage
ship
wing
behind
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.)
Active
Application number
EP16900467.8A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3450299A1 (en
EP3450299A4 (en
Inventor
Satoshi Masuda
Takeharu Fujisawa
Yutaka Yamauchi
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.)
Japan Marine United Corp
Original Assignee
Japan Marine United Corp
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 Japan Marine United Corp filed Critical Japan Marine United Corp
Publication of EP3450299A1 publication Critical patent/EP3450299A1/en
Publication of EP3450299A4 publication Critical patent/EP3450299A4/en
Application granted granted Critical
Publication of EP3450299B1 publication Critical patent/EP3450299B1/en
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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
    • B63H1/28—Other means for improving propeller efficiency
    • 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

Definitions

  • the present invention relates to a propulsion device for a multi-propeller ship.
  • Patent Literature 1 discloses an enhanced propulsion device for a ship comprising a bulb and a pair of opposed fins on a front edge of a rudder behind a propeller at a position axially of the propeller.
  • Patent Literature 2 discloses a two-propeller-two-rudder twin skeg ship with a bulb and a fin on a rudder behind a propeller at portside and starboard side, respectively.
  • Patent literature 3 discloses an appendage having a fin-like projection projected downwardly of the appendage body.
  • rudder is arranged just behind the propeller, attachment of the appendage or appendages such as the bulb and/or the fins on the rudder can provide arrangement of the appendage or appendages behind the propeller.
  • some types of ships have no rudder behind a propeller. More specifically, a rudder in a single-propeller ship is arranged behind a single propeller whereas a three-propeller ship often has no rudders behind wing propellers, provided that a rudder arranged behind a central propeller provides sufficient maneuverability and such single rudder on the central propeller suffices.
  • Some two-propeller ships each with two propellers at portside and starboard side of a stern have single central rudders backward (two-propeller-one-rudder ship); in this case, there are no rudders straight behind the propellers. This applies also in ships each with four or more propellers.
  • some multi-propeller ships each with two or more propellers have a propeller or propellers with no rudder therebehind and there is no structure or structures behind such propeller or propellers suitable for arrangement of the bulb and/or the fins as mentioned in the above.
  • some types of multi-propeller ships have a propeller or propellers for which appendages cannot be arranged to reduce the hub vortex, which has been a factor for hindered enhancement of propulsion efficiency.
  • the invention was made in view of the above and has its object to provide a propulsion device for a multi-propeller ship capable of enhancing propulsion efficiency in the multi-propeller ship.
  • the invention is directed to a three-propeller ship with a propulsion device comprising an appendage arranged, through a support extending from a hull, behind a propeller with no rudder therebehind to reduce a hub vortex.
  • said appendage is in the form of a spindle having a circular cross-section in a direction perpendicular to a central axis thereof along a hull and having a rear portion with diameters gradually reduced toward a rear end.
  • said appendage has a maximum diameter being 10-40% inclusive of a diameter of said propeller and has a length along the hull being 40-70% inclusive of the diameter of said propeller.
  • a propulsion device for a multi-propeller ship according to the invention can exhibit an excellent effect that propulsion efficiency of propellers in the multi-propeller ship can be enhanced.
  • Figs. 1-3 show an embodiment of a propulsion device for a multi-propeller ship according to the invention.
  • the embodiment illustrated is a case where the invention is applied to a three-propeller ship.
  • the multi-propeller ship (three-propeller ship) 1 is provided with three propellers, i.e., a propeller (central propeller) 3 arranged centrally at a stern of a hull 2, a propeller (wing propeller) 4 arranged at portside of the stern and that at starboard side of the stern.
  • a rudder 5 arranged behind the central propeller 3 is a rudder 5 on which a bulb-shaped appendage 6 is arranged at an axial height of the center propeller 3.
  • the appendage 6 is, for example, in the form of a spindle having a circular cross-section in a direction perpendicular to a central axis thereof along the hull and having a rear portion with gradually reduced diameters toward a rear end and is adapted to protrude from a front edge of the rudder 5 toward the central propeller 3.
  • no rudder is arranged behind each of the wing propellers 4; instead, a support 7 is provided for arrangement of the appendage 8 behind the wing propeller 4.
  • the support 7 is a plate member extending from a bottom of the hull 2 to behind the wing propeller 4. To make every effort not to increase hull resistance, the support 7 is shaped to extend vertically along the hull and has a streamlined cross-section along a horizontal plane. Supported on a lower end of the support 7 is the appendage 8 at a height axially of the wing propeller 4.
  • the appendage 8 is configured to be in the form of a spindle having a circular cross-section in a direction perpendicular to a central axis thereof along the hull and having a rear portion with gradually reduced diameters toward a rear end.
  • the central axis is set to be aligned with an axis of the wing propeller 4.
  • the appendage 8 suppresses the hub vortex generating behind the wing propeller 4.
  • a maximum diameter of the appendage 8 near a front end thereof is 10-40% inclusive, more preferably 20-30% inclusive, of the diameter of the wing propeller 4. It is preferable that a length of the appendage 8 along the hull is 40-70% inclusive, more preferably 50-60% inclusive, of the diameter of the wing propeller 4.
  • the appendages 8 may be arranged behind the wing propellers 4, respectively, with no appendage on the rudder 5 behind the central propeller 3; in this case, the reduction in power of the overall three-propeller ship 1 was 4% or so.
  • appendages 9 in the form of fins protruding at portside and starboard side may be provided in place of the appendages 8 shaped as mentioned in the above.
  • the appendages 9 as shown in Fig. 3 may be provided in addition to the appendages 8 as shown in Fig. 2 .
  • An appendage or appendages in any shape may be arranged on the support or supports 7, provided that it or they can reduce the hub vortex behind the wing propeller or propellers 4.
  • arrangement of the support 7 behind the wing propeller 4 makes it possible to arrange the appendage 8 behind the wing propeller 4 with no rudder therebehind to thereby effectively reduce the hub vortex along with rotations of the wing propeller 4.
  • the appendage 8 or 9 for reducing the hub vortex is arranged, through the support 7 extending from the hull 2, behind the propeller (wing propeller) 4 with no rudder arranged therebehind, which can reduce the hub vortex even for the propeller (wing propeller) 4 with no rudder therebehind.
  • the appendage 8 may be in the form of a spindle having circular cross-section in a direction perpendicular to a central axis thereof along the hull and a rear portion with gradually reduced diameters toward a rear end, which can more effectively reduce the hub vortex generating due to the rotation of the propeller (wing propeller) 4.
  • the appendage 8 may be configured to have a maximum diameter which is 10-40% inclusive of a diameter of the propeller (wing propeller) 4 and has a length along the hull which is 40-70% of the diameter of the propeller (wing propeller) 4, which can especially effectively reduce the hub vortex generating due to the rotation of the propeller (wing propeller) 4.
  • the above-mentioned embodiments can enhance propulsion efficiency of a propeller or propellers in a multi-propeller ship.

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)
  • Sliding-Contact Bearings (AREA)
  • Hydraulic Turbines (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
EP16900467.8A 2016-04-28 2016-04-28 Propulsion device for multi-shaft ship Active EP3450299B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2016/063353 WO2017187597A1 (ja) 2016-04-28 2016-04-28 多軸船の推進装置

Publications (3)

Publication Number Publication Date
EP3450299A1 EP3450299A1 (en) 2019-03-06
EP3450299A4 EP3450299A4 (en) 2019-11-06
EP3450299B1 true EP3450299B1 (en) 2021-08-18

Family

ID=60161366

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16900467.8A Active EP3450299B1 (en) 2016-04-28 2016-04-28 Propulsion device for multi-shaft ship

Country Status (5)

Country Link
EP (1) EP3450299B1 (ko)
JP (1) JP6770064B2 (ko)
KR (1) KR102199864B1 (ko)
CN (1) CN109070981B (ko)
WO (1) WO2017187597A1 (ko)

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1549564A (en) * 1923-06-12 1925-08-11 Stephen E Slocum Propeller mount
FR1020502A (fr) * 1950-06-19 1953-02-06 Forges Chantiers Mediterranee Dispositif pour améliorer le rendement de propulsion d'hélices, en particulier pour bateaux
JP3004238B2 (ja) 1997-11-06 2000-01-31 川崎重工業株式会社 船舶の推進性能向上装置
SE531482C2 (sv) * 2005-04-20 2009-04-21 Rolls Royce Ab Arrangemang för framdrivning och styrning av ett fartyg
RU2390464C2 (ru) * 2005-04-20 2010-05-27 Роллс-Ройс Актиеболаг Движительное и рулевое устройство для судна
ATE523423T1 (de) * 2008-09-12 2011-09-15 Waertsilae Netherlands B V Antriebs- und steueranordnung
WO2011144239A1 (en) * 2010-05-19 2011-11-24 Wärtsilä Finland Oy Rotational energy recovery appendage
JP2013107522A (ja) * 2011-11-22 2013-06-06 Nippon Yusen Kk ラダーバルブおよび船舶用舵
JP2013132937A (ja) * 2011-12-26 2013-07-08 Mitsubishi Heavy Ind Ltd 船舶
KR101911013B1 (ko) * 2013-01-14 2018-10-24 현대중공업 주식회사 저항 추진 개선을 위한 쌍축선
JP6046652B2 (ja) 2014-03-04 2016-12-21 三井造船株式会社 船舶

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
CN109070981A (zh) 2018-12-21
JPWO2017187597A1 (ja) 2019-03-07
CN109070981B (zh) 2021-07-13
EP3450299A1 (en) 2019-03-06
WO2017187597A1 (ja) 2017-11-02
EP3450299A4 (en) 2019-11-06
KR102199864B1 (ko) 2021-01-11
JP6770064B2 (ja) 2020-10-14
KR20190003586A (ko) 2019-01-09

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