EP1578662B1 - Dispositif dans un systeme de propulsion - Google Patents

Dispositif dans un systeme de propulsion Download PDF

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Publication number
EP1578662B1
EP1578662B1 EP03767842A EP03767842A EP1578662B1 EP 1578662 B1 EP1578662 B1 EP 1578662B1 EP 03767842 A EP03767842 A EP 03767842A EP 03767842 A EP03767842 A EP 03767842A EP 1578662 B1 EP1578662 B1 EP 1578662B1
Authority
EP
European Patent Office
Prior art keywords
propeller
propulsion system
cap
counter rotating
aft
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.)
Expired - Lifetime
Application number
EP03767842A
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German (de)
English (en)
Other versions
EP1578662A1 (fr
Inventor
Tomi Veikonheimo
Vladimir Alexandrovich Boushkovskiy
Alexander Vladimirovich Pustoshny
Sergey Viacheslavovich Kaprantzev
Irina Gennadievna Frolova
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
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ABB Oy
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Application filed by ABB Oy filed Critical ABB Oy
Publication of EP1578662A1 publication Critical patent/EP1578662A1/fr
Application granted granted Critical
Publication of EP1578662B1 publication Critical patent/EP1578662B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • 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

Definitions

  • This application relates to a counter rotating propulsion system (CRP).
  • the propulsion system is normally located in after part of the marine vessel.
  • the propellers are equipped with hubcap, which is normally covering the propeller fastening bolt.
  • the circulation of water around each forward propeller blade forms a vortex near the hub before they joint to one hub vortex.
  • This hub vortex cavitation is know to be very harmful to the propulsion unit or the rudder behind the main propeller.
  • the hub vortex is itself erosive but it can also induce other harmful forms of cavitation on construction such as propulsion unit or after propeller blade.
  • WO 01 54971 A1 discloses a CRP arrangement where two propellers are propellers are arranged on the same axial line.
  • the aft propeller and the forward propeller have opposite directions of rotating and the aft and forward propellers are arranged opposite to each other.
  • the aft propeller of WO 01 54971 A1 is installed in the pod that can be turned around a vertical axis to steer the ship.
  • EP 0255136 A1 discloses a propulsion system where the cap of the propeller has fins in order to decrease the cavitations of a single propeller.
  • the aim of EP 0255136 is to increase the efficiency of the propulsion arrangement with single propeller.
  • Publication EP 0758606 A1 discloses another single propeller system having fins on the cap of the propeller.
  • Publication DE 606119 C discloses a single propeller with a cylinder or a round body whereto fins are attached.
  • This invention will reduce or eliminate the above mentioned problem in CRP propulsion concept and thus protect the after propeller and entire propulsion unit itself from damage.
  • the invention will increase the capability to steer the propulsion unit behind forward propeller without danger of erosive hub vortex cavitation and without dangerous cavitation on the blades after hub of forward cavitation. This will lead to longer lifetime and reduce repairing costs of the propulsion unit.
  • the invention is based to an idea to break the flow of the vortex caused by the blades of the forward propeller.
  • the hub cab of the propeller in detail the external appearance of the hubcap is formed so that it consists of at least two, equally distributed flow plates projecting from the outer surface of the hubcap.
  • the number of the flow plates is in practice not higher than eight while four flow plates gives the most efficient result.
  • cap itself should be well-streamlined, with relation of cap diameter and cap length not more than 2. It provides the absence of developed separation after hub cap with plates and so make it possible to eliminate blade cavitation in separation zone after fore hub when thruster is not co-axial with fore propeller.
  • the absence of the hub vortex allows the safe operation of after propeller and steerable propulsion unit.
  • the invention is advantageous to implement, as it requires no other modifications to the structure or to operation of the propulsion system or its peripheral devices. Further as the invention mainly is realized with a special forming of a separate component, the invention is adaptable also to the propulsion devices in use.
  • the hubcap of the fore propeller will have the flow plates which are straight and similar to each other. This gives an optimal effect and a balanced structure.
  • the number of the flow plates is independent of the number of the blades of the forward propeller and the position of the flow plates is independent of the position of the blades of the forward propeller.
  • the diameter of the tip edges of the plates is in the range of 0,4 -2 times the maximum hub diameter. Within this range the efficiency of the invented appliance is especially advantageous.
  • the flow plates are fastened to the hub cab either by fixed to the cap by welding or by with bolts.
  • the size and shape of the flow plates is easy to change and vary if necessary depending of the respective requirements. If the flow plates are used with the vessels in use, this possibility might be desirable.
  • the hubcap is moulded as one piece with flow plates whereby the hubcap can be handled as an integrated piece.
  • the aft propeller is turnable and the aft propeller is used to propel and steer the vessel.
  • FIG. 1 shows a propulsion arrangement 2 which is realized with counter rotating propellers (CRP), which is placed under the hull 4 of the vessel.
  • the main propulsion propeller, so called forward propeller 6 is arranged onto the main driving axis 8, which is supported via bearings to the hull 4 of the ship.
  • the forward propeller 6 is driven e.g. by the drive unit, like a diesel engine, directly or via a electric drive that is supplied by a diesel-generator unit by means of a frequency converter which is well-known in the art.
  • the drive unit and the bearing and other features of the power transmission is utilizing conventional technique well-known in the art and there in no need to explain in detail in order to understand the invention.
  • the forward propeller 6 comprises a hub 10 arranged to the driving axis 8 and propeller blades 12 fixed to the hub 10.
  • the number of blades, the inclination of the blades and the size of the blades will be defined when dimensioning the propulsion system of ship and they may vary case by case.
  • the inclination of the blades may also be adjustable.
  • the hull 4 of the ship is designed so that the bottom of the hull curves over the forward propeller 8 and the bottom extends at higher level after the forward propeller.
  • the bottom 14 at the rearmost portion of the ship is higher than the bottom 16 of the ship in front of the forward propeller.
  • a turnable steering device 18 which consists of an azimuth propeller unit, like an AZIPOD® unit, which steers and propels the vessel.
  • the steering device 18 comprises a shaft 20, which is pillowed to be turnable 360 degrees around its vertical axis.
  • a streamlined casing 21, which covers the driving motor of the steering propeller 22, is attached under the shaft 20.
  • the steering propeller 22 is driven by the driving axis 24, which is positioned on the same level as the axis 8 of the forward propeller.
  • the well-streamlined hub cap 30 of the forward propeller 6 and the hub cap 26 of the steering propeller 22 are against each other and the forward propeller 6 and the steering propeller 22 are rotating in the opposite direction when the ship is moving forwards.
  • the steering device 18 is turned around the vertical axis of the shaft 20 in order to effect the desired steering action.
  • the rotating planes of the forward and steering propellers are farther from each other than the double diameter of the forward propeller when the propellers are against each other.
  • the hub cap 30 of the forward propeller 6 and the hub cap 26 of the steering propeller are thus positioned much closer.
  • the vortex and the stress caused by it effects thus heavily to the hubcap of the forward propeller and also to the steering propeller.
  • the hub vortex cavitation and the aft propeller blade cavitation with its harmful effects are minimized by arranging a well-streamlined hub 30 after the forward propeller and flow plates 28 onto the hubcap 30.
  • each flow plate 28 is mounted symmetrically or with equal distance to each flow plate on the outer surface of the hubcap 30 as shown in the figures 2a and 2b .
  • the figure 2a is the side view and the figure 2b is the front view when seen from the rear of the vessel.
  • the hubcap has length L and diameter D, whereby the ratio D/L is not higher than 2.
  • the flow plates are straight plates that are welded or fixed by bolts to the surface of the main propeller hubcap 2.
  • the flow plates 2 can also be cast together with the whole propeller hubcap.
  • the flow plate has been installed on the whole length of the cap surface and the flow plates link up to each other outside the cap surface extending a little over the top edge of the cap.
  • the height of the flow plate does not exceed the radial dimensions of the cap.
  • the flow plate does not extend over the diameter of the hubcap.
  • the flow plates are projected in the radial direction from the surface of the hubcap and they are installed in the direction of the propeller axis with no inclination. It has been shown that the tip edges of the flow plates may vary in the range of 0,4 to 2 times the maximum hub diameter D. Accordingly this range corresponds about 0,12 to 0,4 times the diameter of the propeller.
  • the number of the flow plates is not tied to the number of the propeller blades and it may vary from two to eight while four flow plates has been found to be advantageous. Neither the positioning of the flow plates is not bound to the position of the propeller blades but they can coincide or be aside.

Landscapes

  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Vehicle Body Suspensions (AREA)
  • Manipulator (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)
  • Control Of Linear Motors (AREA)
  • Earth Drilling (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Control Of Electric Motors In General (AREA)
  • Gear-Shifting Mechanisms (AREA)

Claims (9)

  1. Système de propulsion à contre-rotation (CRP), lequel système de propulsion comprend une hélice arrière (22) installée sur un propulseur rotatif (18) et une hélice avant (6) installée sur un arbre (8) ou sur un propulseur, lesquelles hélices sont disposées sur une ligne axiale sensiblement identique, l'hélice arrière (22) et l'hélice avant (6) ayant des sens de rotation opposés et les hélices avant et arrière étant disposées les unes contre les autres, les hélices ayant un moyeu à calotte, caractérisé en ce qu'au moins deux plaques d'écoulement (28) sont disposées sur la calotte (30) de l'hélice avant (6) en saillie radiale depuis la calotte (30) et que les plaques d'écoulement (28) sont réparties régulièrement sur la calotte (30).
  2. Système de propulsion à contre-rotation selon la revendication 1, caractérisé en ce que la calotte de moyeu avant (30) a un ratio diamètre à longueur n'excédant pas 2.
  3. Système de propulsion à contre-rotation selon la revendication 1 ou 2, caractérisé en ce que les plaques d'écoulement (28) sont rectilignes et similaires entre elles.
  4. Système de propulsion à contre-rotation selon l'une quelconque des revendications 1 à 3, caractérisé en ce que le nombre de plaques d'écoulement (28) est indépendant du nombre de pales (12) de l'hélice avant (6) et que la position des plaques d'écoulement (28) est indépendante de la position des pales de l'hélice avant.
  5. Système de propulsion à contre-rotation selon l'une quelconque des revendications 1 à 4, caractérisé en ce que le diamètre des bords supérieurs des plaques (28) est de l'ordre de 0,4 à 2 fois le diamètre maximal du moyeu.
  6. Système de propulsion à contre-rotation selon l'une quelconque des revendications 1 à 5, caractérisé en ce que les plaques (28) sont intégrées à la calotte (30).
  7. Système de propulsion à contre-rotation selon l'une quelconque des revendications 1 à 6, caractérisé en ce que les plaques (28) sont fixées à la calotte (30) par soudure ou par des boulons.
  8. Système de propulsion à contre-rotation selon l'une quelconque des revendications 1 à 7, caractérisé en ce que l'hélice arrière (22) est rotative et que l'hélice arrière (22) est utilisée pour propulser et diriger le vaisseau.
  9. Système de propulsion à contre-rotation selon l'une quelconque des revendications 1 à 8, caractérisé en ce que l'hélice arrière (22) qui se trouve après l'hélice avant (6) a une calotte aérodynamique (26).
EP03767842A 2002-12-20 2003-12-19 Dispositif dans un systeme de propulsion Expired - Lifetime EP1578662B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FI20022265A FI115210B (fi) 2002-12-20 2002-12-20 Laite propulsiojärjestelmässä
FI20022265 2002-12-20
PCT/FI2003/000978 WO2004056654A1 (fr) 2002-12-20 2003-12-19 Dispositif dans un systeme de propulsion

Publications (2)

Publication Number Publication Date
EP1578662A1 EP1578662A1 (fr) 2005-09-28
EP1578662B1 true EP1578662B1 (fr) 2010-11-17

Family

ID=8565138

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03767842A Expired - Lifetime EP1578662B1 (fr) 2002-12-20 2003-12-19 Dispositif dans un systeme de propulsion

Country Status (15)

Country Link
US (1) US20060172632A1 (fr)
EP (1) EP1578662B1 (fr)
JP (1) JP4005601B2 (fr)
KR (1) KR101127484B1 (fr)
CN (1) CN1729123A (fr)
AT (1) ATE488427T1 (fr)
AU (1) AU2003292278B2 (fr)
CA (1) CA2509401C (fr)
DE (1) DE60335026D1 (fr)
DK (1) DK1578662T3 (fr)
ES (1) ES2356628T3 (fr)
FI (1) FI115210B (fr)
NO (1) NO334694B1 (fr)
RU (1) RU2304545C2 (fr)
WO (1) WO2004056654A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008149746A (ja) * 2006-12-14 2008-07-03 Nakashima Propeller Co Ltd 舶用二重反転プロペラ装置
CN103097238B (zh) * 2010-07-12 2016-09-21 罗尔斯-罗伊斯股份公司 具有推进单元的海洋船舶
FI123164B (fi) 2010-12-21 2012-11-30 Waertsilae Finland Oy Vesialus
JP5972711B2 (ja) 2012-08-22 2016-08-17 三菱重工業株式会社 二重反転プロペラ推進方式の船舶
EP2897858A4 (fr) * 2012-09-24 2016-07-06 Rolls Royce Ab Nacelle contrarotative avec volet
CN105270588A (zh) * 2015-10-30 2016-01-27 佛山市神风航空科技有限公司 一种船舶用对称型双级推进装置
CN105523160A (zh) * 2016-01-05 2016-04-27 上海船舶研究设计院 对转桨前后桨桨毂连接结构
WO2017158204A1 (fr) 2016-03-18 2017-09-21 Rolls-Royce Marine As Système de propulsion contrarotatif orientable
CN112061361B (zh) * 2020-10-10 2022-05-27 宁波海伯集团有限公司 一种船用推进器

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE606119C (de) 1933-11-12 1934-11-24 Nicholas Wladimir Akimoff Einrichtung zur Erhoehung des Wirkungsgrades eines Schraubenpropellers
CA1341138C (fr) * 1986-06-30 2000-11-14 Minnesota Mining And Manufacturing Company Cristaux liquides smectiques chiraux a base de fluor
AU593670B2 (en) 1986-07-31 1990-02-15 Mikado Propeller Co., Ltd. A screw propeller boss cap with fins
KR890000311A (ko) * 1987-06-24 1989-03-13 이나바 고오사꾸 아이들 프로펠러장치
EP0758606A1 (fr) 1995-08-16 1997-02-19 Schottel-Werft Josef Becker GmbH & Co KG. Chapeau de moyeu pour hélices de bateau
US6899576B2 (en) * 1997-11-07 2005-05-31 Schottel Gmbh & Co. Kg Twin-propeller drive for watercraft
FI110595B (fi) 2000-01-28 2003-02-28 Abb Oy Järjestely aluksessa, menetelmä tilan käyttämiseksi hyväksi aluksessa sekä propulsioyksikön asennusjärjestely
US6280284B1 (en) * 2000-03-17 2001-08-28 Carl Winefordner Toy submarine with counter rotating propellers
FI116129B (fi) * 2003-04-07 2005-09-30 Waertsilae Finland Oy Vesialuksen propulsioyksikkö
FI20030556A0 (fi) * 2003-04-11 2003-04-11 Abb Oy Menetelmä ja laitteisto laivan ohjaamiseksi

Also Published As

Publication number Publication date
NO334694B1 (no) 2014-05-12
AU2003292278B2 (en) 2008-10-09
CA2509401C (fr) 2011-07-19
JP4005601B2 (ja) 2007-11-07
KR101127484B1 (ko) 2012-03-23
FI115210B (fi) 2005-03-31
FI20022265A (fi) 2004-06-21
ATE488427T1 (de) 2010-12-15
US20060172632A1 (en) 2006-08-03
KR20050084403A (ko) 2005-08-26
RU2304545C2 (ru) 2007-08-20
AU2003292278A1 (en) 2004-07-14
CN1729123A (zh) 2006-02-01
ES2356628T3 (es) 2011-04-11
FI20022265A0 (fi) 2002-12-20
WO2004056654A1 (fr) 2004-07-08
DK1578662T3 (da) 2011-02-21
NO20053510L (no) 2005-07-18
EP1578662A1 (fr) 2005-09-28
DE60335026D1 (de) 2010-12-30
JP2006510532A (ja) 2006-03-30
RU2005122954A (ru) 2006-01-20
CA2509401A1 (fr) 2004-07-08

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