EP0758606A1 - Chapeau de moyeu pour hélices de bateau - Google Patents

Chapeau de moyeu pour hélices de bateau Download PDF

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Publication number
EP0758606A1
EP0758606A1 EP96112507A EP96112507A EP0758606A1 EP 0758606 A1 EP0758606 A1 EP 0758606A1 EP 96112507 A EP96112507 A EP 96112507A EP 96112507 A EP96112507 A EP 96112507A EP 0758606 A1 EP0758606 A1 EP 0758606A1
Authority
EP
European Patent Office
Prior art keywords
hub cap
propeller
hub
blades
cap 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.)
Withdrawn
Application number
EP96112507A
Other languages
German (de)
English (en)
Inventor
Reinhard Dr.-Habil Schulze
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.)
Schiffbau-Versuchsanstalt Potsdam GmbH
Schottel GmbH and Co KG
Original Assignee
Schiffbau-Versuchsanstalt Potsdam GmbH
Schottel GmbH and Co KG
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
Priority claimed from DE19622829A external-priority patent/DE19622829A1/de
Application filed by Schiffbau-Versuchsanstalt Potsdam GmbH, Schottel GmbH and Co KG filed Critical Schiffbau-Versuchsanstalt Potsdam GmbH
Publication of EP0758606A1 publication Critical patent/EP0758606A1/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Withdrawn legal-status Critical Current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
    • B63H1/28—Other means for improving propeller efficiency
    • 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
    • B63H2001/283—Propeller hub caps with fins having a pitch different from pitch of propeller blades, or a helix hand opposed to the propellers' helix hand
    • 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
    • B63H2005/103—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 of co-rotative type, i.e. rotating in the same direction, e.g. twin propellers

Definitions

  • the invention relates to a hub cap for closing the hub bore on a propeller or on the underwater gear bulb of a drive.
  • Propellers of propellers are usually provided with hub caps, which are used to seal underwater hub openings or gear bulbs.
  • the hub caps form the inner boundary of the propeller blades, on which flow vortices form during propeller operation. The power losses caused by vortices are considerable and are particularly noticeable with large diameter propeller hubs and with propellers for higher thrust loads.
  • the invention has for its object to find a solution with which this loss of performance can be counteracted successfully.
  • the invention is based on the knowledge that the appropriate configuration or shaping of the hub cap can counteract the formation of vortices by the propeller in the vicinity of the hub by specifically changing the pressure conditions in this environment by the configuration of the cap.
  • the propeller wing surfaces responsible for the thrust are limited on the outside by the wing tips and on the inside by the hub.
  • the current breaks off with the formation of eddies.
  • These turbulent flows which are high in energy, have a direction different from the direction of thrust and therefore consume part of the energy supplied by the motor to the propeller.
  • the inventive design of the hub cap enables energy to be recovered from the vortices, at least in the hub area, which can significantly improve the efficiency of a ship's propulsion system.
  • the noise emission is reduced by the invention.
  • the hub cap contains at least one blade, which ensures removal of the hub vortex during operation.
  • Such a hub cap can be retrofitted at any time, there are no others Replacing components, rather all other components of the drive system can remain unchanged.
  • a plurality of blades which are distributed regularly over the circumference of the hub cap and are arranged approximately in a meridional orientation, are preferably provided.
  • the hub cap according to the invention can be used both with screw propellers that work as pressure propellers and with train propellers.
  • the propeller hub 12 carries a hub cap 13 which covers the hub bore 14 against the ingress of water.
  • the vortices arise during operation of the propeller, which can be high in energy and have a direction different from the thrust direction. This results in decisive disadvantages for the efficiency of the propeller 11.
  • the vortices consume part of the energy supplied by the motor to the propeller and generate a counter-thrust that reduces efficiency.
  • the vortex energy is partly converted into increased sound radiation.
  • the screw propeller operating according to FIG. 1 as a pressure propeller 11 has a rotating hub cap 13, which lies behind the propeller 11 in the direction of flow V.
  • the vortex that forms behind the propeller 11 along the hub cap 13 initially consists of several vortices of the different blades 15, which then quickly form a single vortex, which leaves its track in a narrowly defined area along the axis of rotation of the propeller.
  • the direction of rotation of this vortex coincides with the direction of rotation of the propeller and the velocities of the vortex are greatest on the inside and decrease towards the outside.
  • speeds V w occur at the very inside along the hub cap 13, which speeds are significantly higher than the rotational speed V u of the propeller 11 itself.
  • the tangential components V T of the vortex speed V w dashed curve) and that by the propeller rotation caused circumferential speed V u (continuous curve) depending on the distance R from the propeller axis 22 shown. From the intersection A there results a limit radius R g up to which the component V T of the vortex speed V w is greater than that of the peripheral speed V u on the propeller. Ice at this limit radius R g enables energy recovery.
  • the blades 15 of the hub cap 13 extend from the propeller axis 22 to a maximum of the limit radius R g in order to optimally use the effect of the blades 15.
  • the curvature of the blade surfaces is opposite to that of the propeller surfaces. In this way, the eddy currents are deflected in the beam direction, it being entirely possible to deflect the current in such a way that an additional thrust is generated.
  • four blades 16 are shown distributed over the circumference of the hub cap 13, which extend from the end 17 facing the propeller hub 12 to the tip 18 of the hub cap 13.
  • FIG. 3 Another configuration of the blades is shown in FIG. 3 in connection with a traction propeller 11 '.
  • a non-rotating drain cap 25 is provided with blades 26.
  • hub caps are particularly important on propellers for higher levels of thrust.
  • Such propellers generate a high thrust in a comparatively small area and thus inevitably reinforced hub vortices. Due to the high loss, a high improvement can be achieved when using a hub cap designed according to the invention.
  • These propellers include e.g. Propeller 11 with end plates 21 according to Fig.1, so-called tip-fin propellers.
  • the combination with end plates is advantageous, but not essential.
  • the hub cap described above is shown in the drawings in connection with a sterndrive.
  • the hub caps according to the invention can of course also be used with all other ship propulsion systems.
EP96112507A 1995-08-16 1996-08-02 Chapeau de moyeu pour hélices de bateau Withdrawn EP0758606A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19529992 1995-08-16
DE19529992 1995-08-16
DE19622829A DE19622829A1 (de) 1995-08-16 1996-06-07 Nabenkappe für Schiffsschrauben
DE19622829 1996-06-07

Publications (1)

Publication Number Publication Date
EP0758606A1 true EP0758606A1 (fr) 1997-02-19

Family

ID=26017716

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96112507A Withdrawn EP0758606A1 (fr) 1995-08-16 1996-08-02 Chapeau de moyeu pour hélices de bateau

Country Status (1)

Country Link
EP (1) EP0758606A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0916574A3 (fr) * 1997-11-12 2001-04-25 Adalbert Zwirchmayr Hélice
EP1306301A1 (fr) 2001-10-26 2003-05-02 Howaldtswerke-Deutsche Werft Ag Dispositif pour contrebalancer la cavitation tourbillonnaire du moyeu des hélices et/ou des unités de propulsion
WO2004056654A1 (fr) 2002-12-20 2004-07-08 Abb Oy Dispositif dans un systeme de propulsion
WO2004074088A1 (fr) * 2003-02-21 2004-09-02 Siemens Aktiengesellschaft Systeme de propulsion navale, en particulier pour un grand navire marin
EP2593356A1 (fr) * 2010-07-12 2013-05-22 Rolls-Royce Aktiebolag Groupe propulseur pour un navire et navire présentant un groupe propulseur
US9328613B2 (en) 2011-11-18 2016-05-03 Becker Marine Systems Gmbh & Co Kg Propeller arrangement, in particular for watercraft
CN106715258A (zh) * 2014-09-26 2017-05-24 西门子公司 具有牵引螺旋桨的吊舱驱动装置
US11713101B2 (en) 2020-12-04 2023-08-01 Jeffrey L. HATHAWAY Propeller hubcap

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE241203C (de) * 1905-11-12 1911-11-28 Wagner Rudolf Schraube mit festen, in achsialer Richtung gekrümmten Gegenschaufeln ohne Mantel.
DE606119C (de) * 1933-11-12 1934-11-24 Nicholas Wladimir Akimoff Einrichtung zur Erhoehung des Wirkungsgrades eines Schraubenpropellers
FR2337661A1 (fr) * 1976-01-08 1977-08-05 Espanoles Astilleros Helice pour bateau
EP0013929A1 (fr) * 1979-01-22 1980-08-06 Fritz-Johann Finze Dispositif pour augmenter la force propulsive vers l'arrière d'un moteur de navire pourvu d'un engrenage réversible
DE3037369A1 (de) * 1980-09-01 1982-03-11 Escher Wyss Gmbh, 7980 Ravensburg Schiffspropeller
EP0255136A1 (fr) * 1986-07-31 1988-02-03 Mitsui O.S.K. Lines, Ltd. Moyeu d'hélice à ailerons

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE241203C (de) * 1905-11-12 1911-11-28 Wagner Rudolf Schraube mit festen, in achsialer Richtung gekrümmten Gegenschaufeln ohne Mantel.
DE606119C (de) * 1933-11-12 1934-11-24 Nicholas Wladimir Akimoff Einrichtung zur Erhoehung des Wirkungsgrades eines Schraubenpropellers
FR2337661A1 (fr) * 1976-01-08 1977-08-05 Espanoles Astilleros Helice pour bateau
EP0013929A1 (fr) * 1979-01-22 1980-08-06 Fritz-Johann Finze Dispositif pour augmenter la force propulsive vers l'arrière d'un moteur de navire pourvu d'un engrenage réversible
DE3037369A1 (de) * 1980-09-01 1982-03-11 Escher Wyss Gmbh, 7980 Ravensburg Schiffspropeller
EP0255136A1 (fr) * 1986-07-31 1988-02-03 Mitsui O.S.K. Lines, Ltd. Moyeu d'hélice à ailerons

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0916574A3 (fr) * 1997-11-12 2001-04-25 Adalbert Zwirchmayr Hélice
EP1306301A1 (fr) 2001-10-26 2003-05-02 Howaldtswerke-Deutsche Werft Ag Dispositif pour contrebalancer la cavitation tourbillonnaire du moyeu des hélices et/ou des unités de propulsion
DE10152977C1 (de) * 2001-10-26 2003-05-08 Howaldtswerke Deutsche Werft Vorrichtung zur Entgegenwirkung von im Nabenbereich von Propellern und/oder Propellerantrieben im umgebenden Fluid erzeugten Strömungswirbeln
WO2004056654A1 (fr) 2002-12-20 2004-07-08 Abb Oy Dispositif dans un systeme de propulsion
WO2004074088A1 (fr) * 2003-02-21 2004-09-02 Siemens Aktiengesellschaft Systeme de propulsion navale, en particulier pour un grand navire marin
EP2593356A1 (fr) * 2010-07-12 2013-05-22 Rolls-Royce Aktiebolag Groupe propulseur pour un navire et navire présentant un groupe propulseur
EP2593356A4 (fr) * 2010-07-12 2017-04-26 Rolls-Royce Aktiebolag Groupe propulseur pour un navire et navire présentant un groupe propulseur
US9328613B2 (en) 2011-11-18 2016-05-03 Becker Marine Systems Gmbh & Co Kg Propeller arrangement, in particular for watercraft
CN106715258A (zh) * 2014-09-26 2017-05-24 西门子公司 具有牵引螺旋桨的吊舱驱动装置
JP2017528370A (ja) * 2014-09-26 2017-09-28 シーメンス アクチエンゲゼルシヤフトＳｉｅｍｅｎｓ Ａｋｔｉｅｎｇｅｓｅｌｌｓｃｈａｆｔ 牽引プロペラを備えたゴンドラ推進装置
US11713101B2 (en) 2020-12-04 2023-08-01 Jeffrey L. HATHAWAY Propeller hubcap

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