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US20060172632A1 - Arrangement in a propulsion system - Google Patents

Arrangement in a propulsion system Download PDF

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Publication number
US20060172632A1
US20060172632A1 US10/539,089 US53908905A US2006172632A1 US 20060172632 A1 US20060172632 A1 US 20060172632A1 US 53908905 A US53908905 A US 53908905A US 2006172632 A1 US2006172632 A1 US 2006172632A1
Authority
US
United States
Prior art keywords
propeller
cap
aft
flow plates
arrangement according
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.)
Abandoned
Application number
US10/539,089
Other languages
English (en)
Inventor
Tomi Veikonheimo
Vladimir Boushikovskiy
Alexander Pustoshny
Sergey Kaprantzev
Irina 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
Original Assignee
Individual
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 Individual filed Critical Individual
Assigned to ABB OY reassignment ABB OY ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BOUSHKOVSKIY, VLADIMIR ALEXANDROVICH, FROLOVA, IRINA GENNADIEVNA, KAPRANTZEV, SERGEY VIACHESLAVOVICH, PUSTOSHNY, ALEXANDER VLADIMIROVICH, VEIKONHEIMO, TOMI
Publication of US20060172632A1 publication Critical patent/US20060172632A1/en
Abandoned 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 an arrangement in a counter rotating propulsion system (CRP).
  • CRP counter rotating propulsion system
  • 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 known 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.
  • 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 is a schematic view of a CRP arrangement according to the invention
  • FIG. 2 a is side view of a hub cap according to the invention.
  • FIG. 2 b is front view of a hub cab of FIG. 2 a.
  • 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 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 .
  • FIGS. 2 a and 2 b are mounted symmetrically or with equal distance to each flow plate on the outer surface of the hubcap 30 as shown in the FIGS. 2 a and 2 b .
  • the FIG. 2 a is the side view and the FIG. 2 b 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

  • 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)
  • Vehicle Body Suspensions (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)
  • Manipulator (AREA)
  • Control Of Electric Motors In General (AREA)
  • Gear-Shifting Mechanisms (AREA)
  • Control Of Linear Motors (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Earth Drilling (AREA)
US10/539,089 2002-12-20 2003-12-19 Arrangement in a propulsion system Abandoned US20060172632A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FI20022265A FI115210B (fi) 2002-12-20 2002-12-20 Laite propulsiojärjestelmässä
FI2002265 2002-12-20
PCT/FI2003/000978 WO2004056654A1 (en) 2002-12-20 2003-12-19 Arrangement in a propulsion system

Publications (1)

Publication Number Publication Date
US20060172632A1 true US20060172632A1 (en) 2006-08-03

Family

ID=8565138

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/539,089 Abandoned US20060172632A1 (en) 2002-12-20 2003-12-19 Arrangement in a propulsion system

Country Status (15)

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

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2897858A4 (en) * 2012-09-24 2016-07-06 Rolls Royce Ab CONTEMPORARY GONDOLA WITH FLAP
US9463856B2 (en) 2012-08-22 2016-10-11 Mitsubishi Heavy Industries, Ltd. Ship of contrarotating propeller propulsion type
EP2593356A4 (en) * 2010-07-12 2017-04-26 Rolls-Royce Aktiebolag A propulsion unit for a marine vessel and a marine vessel having a propulsion unit

Families Citing this family (6)

* 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
FI123164B (fi) 2010-12-21 2012-11-30 Waertsilae Finland Oy Vesialus
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
WO2017158203A1 (en) 2016-03-18 2017-09-21 Rolls-Royce Marine As Lifeboat ramp
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

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6280284B1 (en) * 2000-03-17 2001-08-28 Carl Winefordner Toy submarine with counter rotating propellers
US20040147182A1 (en) * 1997-11-07 2004-07-29 Reinhold Reuter Twin-propeller drive for watercraft
US20040198108A1 (en) * 2003-04-07 2004-10-07 Oskar Levander Propulsion unit of marine vessel
US20060246793A1 (en) * 2003-04-11 2006-11-02 Abb Oy Method and apparatus to control a ship

Family Cites Families (8)

* 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 (en) * 1986-06-30 2000-11-14 Minnesota Mining And Manufacturing Company Fluorine-containing chiral smectic liquid crystals
AU593670B2 (en) * 1986-07-31 1990-02-15 Mikado Propeller Co., Ltd. A screw propeller boss cap with fins
JPS641690A (en) * 1987-06-24 1989-01-06 Ishikawajima Harima Heavy Ind Co Ltd Propeller idling device
EP0758606A1 (de) * 1995-08-16 1997-02-19 Schottel-Werft Josef Becker GmbH & Co KG. Nabenkappe für Schiffsschrauben
RU2115589C1 (ru) * 1996-06-25 1998-07-20 Государственный научно-исследовательский и проектно-конструкторский институт по развитию и эксплуатации флота "Гипрорыбфлот" Судовая движительно-двигательная установка типа "поворотная колонка"
JPH11222188A (ja) 1998-02-09 1999-08-17 Hitachi Zosen Corp 船舶におけるチップ渦エネルギーの回収装置
FI110595B (fi) * 2000-01-28 2003-02-28 Abb Oy Järjestely aluksessa, menetelmä tilan käyttämiseksi hyväksi aluksessa sekä propulsioyksikön asennusjärjestely

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040147182A1 (en) * 1997-11-07 2004-07-29 Reinhold Reuter Twin-propeller drive for watercraft
US6280284B1 (en) * 2000-03-17 2001-08-28 Carl Winefordner Toy submarine with counter rotating propellers
US20040198108A1 (en) * 2003-04-07 2004-10-07 Oskar Levander Propulsion unit of marine vessel
US20060246793A1 (en) * 2003-04-11 2006-11-02 Abb Oy Method and apparatus to control a ship
US7442100B2 (en) * 2003-04-11 2008-10-28 Abb Oy Method and apparatus to control a ship

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2593356A4 (en) * 2010-07-12 2017-04-26 Rolls-Royce Aktiebolag A propulsion unit for a marine vessel and a marine vessel having a propulsion unit
US9463856B2 (en) 2012-08-22 2016-10-11 Mitsubishi Heavy Industries, Ltd. Ship of contrarotating propeller propulsion type
EP2897858A4 (en) * 2012-09-24 2016-07-06 Rolls Royce Ab CONTEMPORARY GONDOLA WITH FLAP

Also Published As

Publication number Publication date
FI20022265A0 (fi) 2002-12-20
JP2006510532A (ja) 2006-03-30
ES2356628T3 (es) 2011-04-11
RU2005122954A (ru) 2006-01-20
FI115210B (fi) 2005-03-31
CN1729123A (zh) 2006-02-01
EP1578662A1 (en) 2005-09-28
NO334694B1 (no) 2014-05-12
ATE488427T1 (de) 2010-12-15
DK1578662T3 (da) 2011-02-21
CA2509401C (en) 2011-07-19
KR101127484B1 (ko) 2012-03-23
AU2003292278B2 (en) 2008-10-09
RU2304545C2 (ru) 2007-08-20
CA2509401A1 (en) 2004-07-08
NO20053510L (no) 2005-07-18
AU2003292278A1 (en) 2004-07-14
JP4005601B2 (ja) 2007-11-07
FI20022265A7 (fi) 2004-06-21
DE60335026D1 (de) 2010-12-30
EP1578662B1 (en) 2010-11-17
KR20050084403A (ko) 2005-08-26
WO2004056654A1 (en) 2004-07-08

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Legal Events

Date Code Title Description
AS Assignment

Owner name: ABB OY, FINLAND

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:VEIKONHEIMO, TOMI;BOUSHKOVSKIY, VLADIMIR ALEXANDROVICH;PUSTOSHNY, ALEXANDER VLADIMIROVICH;AND OTHERS;REEL/FRAME:017126/0385;SIGNING DATES FROM 20050714 TO 20050728

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION