EP0265645B1 - Surface de guidage de filets d'eau - Google Patents

Surface de guidage de filets d'eau Download PDF

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Publication number
EP0265645B1
EP0265645B1 EP87113375A EP87113375A EP0265645B1 EP 0265645 B1 EP0265645 B1 EP 0265645B1 EP 87113375 A EP87113375 A EP 87113375A EP 87113375 A EP87113375 A EP 87113375A EP 0265645 B1 EP0265645 B1 EP 0265645B1
Authority
EP
European Patent Office
Prior art keywords
control surface
propeller
shaft
propellor
flow
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
EP87113375A
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German (de)
English (en)
Other versions
EP0265645A1 (fr
Inventor
Herbert Prof. Dr.-Ing. Schneekluth
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0265645A1 publication Critical patent/EP0265645A1/fr
Application granted granted Critical
Publication of EP0265645B1 publication Critical patent/EP0265645B1/fr
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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
    • B63H5/16—Arrangements on vessels of propulsion elements directly acting on water of propellers characterised by being mounted in recesses; with stationary water-guiding elements; Means to prevent fouling of the propeller, e.g. guards, cages or screens
    • 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 invention relates to a flow guide surface for double screw arrangements of ships, which are supported by shaft brackets using a profiled and arcuate design, the arc is arranged transversely to the flow direction in front of the propeller at least in the sector between the shaft bracket arms and the arcuate part of the guide surface one after has a skeleton line inclined towards the propeller shaft.
  • a flow control surface at the stern of screw-in ships is known.
  • the guide surfaces form a closed ring together with the outer skin. This design accelerates the flow on the outer skin in the area of the guide surface, and essentially reduces the flow separation on the hull. However, this does not occur in ships with double screws.
  • the propeller shafts are freely guided through the water over such a distance that the propeller shafts must be supported at the end. This is usually done by two-armed wave blocks.
  • the propeller shafts, which run at an angle to the flow, and the shaft brackets slow down the flow speed and thus increase the co-current that comes about through the boundary layer of the hull and through the flow separation.
  • the non-uniformity of the water flow to the propeller means one Deterioration in propeller efficiency.
  • the area with low inflow velocity is also an area with higher local propeller loads. This means that stronger pressure impulses are exerted on the nearby outer skin areas from there. This area of high pressure emission is usually the closest to the outer skin. This area is also particularly at risk of cavitation due to the high shear stress and the relatively low water column above it.
  • the object of the invention is to provide a generic arrangement that enables the propeller inflow to be evened out with an improvement in the propeller efficiency and prevents the formation of stronger pressure pulses on the outer skin.
  • the guide surface is arranged to form a passage area to the ship's outer skin and at a distance from the propeller shaft at the profile trailing edge between 70 and 130% of the propeller radius and the suction side of the nozzle profile in the curved nozzle part is directed to the propeller shaft and that the amidships side connects the guide surface to an additional guide surface part that runs approximately horizontally and radially to the propeller shaft.
  • the inflow speed is increased in the area which the guiding surface encloses. This local increase in flow velocity takes place in a region with a stronger wake. This is associated with an equalization of the propeller inflow and an improvement in the propeller efficiency.
  • the profile of the guide surface has a curve at least in a partial area such that the rear of the profile follows the beam contraction.
  • air outlet openings in the guide surface for air supply to the propeller inflow are arranged.
  • a midship plane 1, a frame contour 2 and a gill line 3 of a side contour in the propeller area of a hull are designated.
  • the propeller 6 is held via its propeller shaft 8 via arms 4 to form a shaft bracket and provided with a shaft bracket nut 5.
  • a profiled curved guide surface 9 is arranged above the propeller shaft 8 in the sector between the arms 4 and laterally beyond. This guide surface 9 is arranged with a backward falling skeleton line that the inflow speed is increased in this area.
  • the front storage space of the guide surface 9 thus has a greater distance from the propeller shaft 8 than the profile end. This local increase in the flow velocity takes place in a region with a greater wake and means an equalization of the propeller inflow and at the same time an improvement in the propeller efficiency.
  • the co-current field in the hatching area 10 is moderately pronounced and between the arms 4 in region 11 is more pronounced.
  • the co-current field is influenced by the guide surface 9 and the propeller inflow area has a more uniform one Speed distribution on.
  • the guide surface 9 is used for air supply.
  • the interior 13 is delimited by an inner wall 14 and an outer wall 15 and supplied by compressed air.
  • the compressed air exits into the propeller inflow via corresponding outlet openings 16 of the guide surface, and this results in a relief of the propeller tips and a reduction in vibration.

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)
  • Vibration Prevention Devices (AREA)
  • Soft Magnetic Materials (AREA)
  • Ship Loading And Unloading (AREA)

Claims (4)

  1. Surface de guidage de filets d'eau pour appareils à deux hélices de navires qui sont soutenus par des supports d'arbre porte-hélices (4), la surface de guidage se présentant sous une forme profilée et arquée, l'arc étant prévu transversalement au sens du courant à l'avant de l'hélice propulsive (6), au moins dans le secteur compris entre les bras du support d'arbre porte-hélices (4) et la partie arquée de la surface de guidage (9) présentant une ligne d'ossature inclinée vers l'arrière en direction de l'arbre (8) de l'hélice propulsive, la surface de guidage de filets d'eau (9) étant caractérisée en ce qu'elle est prévue de façon à former une zone de passage vers le bordage de carène du navire et à se trouver, au côté de sortie du profil, à une distance de l'arbre (8) de l'hélice propulsive d'une valeur allant de 70 à 130 % de la valeur du rayon de l'hélice propulsive, en ce que le côté d'aspiration du profil de tuyère dans la partie arquée de tuyère est dirigé vers l'arbre (8) de l'hélice propulsive, et en ce qu'au côté dirigé vers le milieu du navire, la surface de guidage (9) comporte une partie complémentaire (12) qui suit une allure horizontale et radiale par rapport à l'arbre (8) de l'hélice propulsive.
  2. Surface de guidage de filets d'eau suivant la revendication 1, caractérisée en ce qu'un secteur s'étendant au-delà des bras du support d'arbre porte-hélices (4) est contenu dans la surface de guidage (9).
  3. Surface de guidage de filets d'eau suivant l'une ou l'autre des revendications 1 et 2, caractérisée en ce que son profil suit, au moins dans une zone partielle, une allure incurvée de telle sorte que l'extrémité postérieure du profil suive la contraction du jet.
  4. Surface de guidage de filets d'eau suivant l'une quelconque des revendications 1 à 3, caractérisée en ce que des ouvertures de sortie d'air sont prévues dans la surface de guidage (9) pour l'amenée d'air dans l'afflux d'eau vers l'hélice propulsive.
EP87113375A 1986-10-03 1987-09-12 Surface de guidage de filets d'eau Expired - Lifetime EP0265645B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3633689A DE3633689C1 (de) 1986-10-03 1986-10-03 Stroemungsleitflaeche
DE3633689 1986-10-03

Publications (2)

Publication Number Publication Date
EP0265645A1 EP0265645A1 (fr) 1988-05-04
EP0265645B1 true EP0265645B1 (fr) 1991-03-20

Family

ID=6310974

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87113375A Expired - Lifetime EP0265645B1 (fr) 1986-10-03 1987-09-12 Surface de guidage de filets d'eau

Country Status (8)

Country Link
US (1) US4804312A (fr)
EP (1) EP0265645B1 (fr)
JP (1) JPS6390496A (fr)
DE (2) DE3633689C1 (fr)
DK (1) DK166141C (fr)
ES (1) ES2022244B3 (fr)
FI (1) FI91512C (fr)
GR (1) GR3002144T3 (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5395526A (en) * 1991-08-22 1995-03-07 Fujiwara; Michihiro Scum removal apparatus
DE4138281C1 (fr) * 1991-11-02 1993-04-29 Herbert Prof. Dr.-Ing. 5100 Aachen De Schneekluth
DE4325290A1 (de) * 1993-07-28 1995-02-02 Dudszus Alfred Prof Dr Ing Hab Nachstromdüse
DE10135474B4 (de) * 2001-07-20 2005-10-20 Kvaerner Warnow Werft Gmbh Schiff
US9446827B2 (en) 2010-07-15 2016-09-20 Myron Sherer Boat hull construction
US8800463B2 (en) 2010-07-15 2014-08-12 Myron Sherer Boat hull construction
PL2591994T3 (pl) * 2011-11-11 2015-03-31 Becker Marine Sys Gmbh & Co Kg Urządzenie do zmniejszania zapotrzebowania na moc napędową pojazdu wodnego
USD682186S1 (en) 2012-02-17 2013-05-14 Arlon J. Gilk Propeller bearing seal protector
US8911272B1 (en) 2012-02-17 2014-12-16 Arlon J. Gilk Long shaft propeller controller and bearing seal protector
KR102130721B1 (ko) * 2013-09-26 2020-08-05 대우조선해양 주식회사 비틀림 스트럿 및 그 비틀림 스트럿의 설치구조
KR102384493B1 (ko) * 2013-12-16 2022-04-08 고쿠리츠겐큐카이하츠호진 가이죠·고완·고쿠기쥬츠겐큐죠 선미용 덕트, 선미용 부가물, 선미용 덕트의 설계 방법, 및 선미용 덕트를 장착한 선박
DE102015103285A1 (de) * 2015-03-06 2016-09-08 Becker Marine Systems Gmbh & Co. Kg Anordnung für Mehrschraubenschiffe mit außenliegenden Propellerwellen sowie Verfahren zur Herstellung einer solchen Anordnung
US9616986B1 (en) 2015-08-14 2017-04-11 Arlon J. Gilk Adjustable transom mount

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE241056C (fr) *
DE238586C (fr) *
US682027A (en) * 1899-09-22 1901-09-03 Harold Fubister Burgess Propulsion of vessels.
US904313A (en) * 1908-01-17 1908-11-17 George B Davis Hood for propeller-wheels.
US1801875A (en) * 1927-05-03 1931-04-21 Melcher Franz Hull or body of craft
GB401425A (en) * 1932-07-07 1933-11-16 Richard De Villamil Improvements in or relating to screw propellers and screw fans
DE858213C (de) * 1951-05-22 1952-12-04 Ludwig Dipl-Ing Kort Leitvorrichtung fuer Schiffsschrauben von dem Schraubenkreissektor mit hoechstem Nachstrom
GB1215136A (en) * 1967-02-20 1970-12-09 Kort Propulsion Co Ltd Improvements in nozzles or shrouds for ships' propellers
DD95984A1 (fr) * 1971-10-22 1973-02-20
US4240251A (en) * 1978-05-25 1980-12-23 Fuller Ronald G Cavitation compensating propeller nozzle or duct
DE3216578C1 (de) * 1982-05-04 1983-10-13 Herbert Prof. Dr.-Ing. 5100 Aachen Schneekluth Stroemungsleitflaeche am Heck von Einschraubenschiffen
DE3615619A1 (de) * 1985-06-24 1987-01-02 Schiffbau Veb K Leiteinrichtung zur beeinflussung der propellerzustroemung bei schiffen
DD241056A1 (de) * 1985-09-23 1986-11-26 Schiffbau Stammbetrieb K Vorrichtung zur erhoehung des wirkungsgrades von schiffspropellern

Also Published As

Publication number Publication date
US4804312A (en) 1989-02-14
FI91512C (fi) 1994-07-11
DK519787D0 (da) 1987-10-02
DK166141C (da) 1993-07-26
FI91512B (fi) 1994-03-31
DE3633689C1 (de) 1988-02-04
FI874156A0 (fi) 1987-09-23
ES2022244B3 (es) 1991-12-01
DK166141B (da) 1993-03-15
JPS6390496A (ja) 1988-04-21
DE3768757D1 (de) 1991-04-25
FI874156A (fi) 1988-04-04
DK519787A (da) 1988-04-04
GR3002144T3 (en) 1992-12-30
EP0265645A1 (fr) 1988-05-04

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