WO1989011998A1 - Double ajutage - Google Patents

Double ajutage Download PDF

Info

Publication number
WO1989011998A1
WO1989011998A1 PCT/NL1989/000039 NL8900039W WO8911998A1 WO 1989011998 A1 WO1989011998 A1 WO 1989011998A1 NL 8900039 W NL8900039 W NL 8900039W WO 8911998 A1 WO8911998 A1 WO 8911998A1
Authority
WO
WIPO (PCT)
Prior art keywords
nozzle
flap
main
double
main nozzle
Prior art date
Application number
PCT/NL1989/000039
Other languages
English (en)
Inventor
Leonard Anthonie Van Gunsteren
Jacon Lourens Gelling
Original Assignee
Van Gunsteren & Gelling Marine Propulsion Developm
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 Van Gunsteren & Gelling Marine Propulsion Developm filed Critical Van Gunsteren & Gelling Marine Propulsion Developm
Priority to DE68911913T priority Critical patent/DE68911913T2/de
Priority to KR1019900700099A priority patent/KR900701602A/ko
Publication of WO1989011998A1 publication Critical patent/WO1989011998A1/fr

Links

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
    • B63H5/14—Arrangements on vessels of propulsion elements directly acting on water of propellers characterised by being mounted in non-rotating ducts or rings, e.g. adjustable for steering purpose

Definitions

  • STEREN & GELLING MARINE PROPULSION DEtent JP, KP, KR, LK, LU (European patent), MC, M VELOPMENT B.V. [NL/NL]; Kalfjeslaan 12, NL-2623 ML(OAPIpatent), MR (OAPI patent), MW, NL(Eu AH Delft (NL). pean patent), NO, RO, SD, SE (European patent), (OAPI patent), SU, TD (OAPI patent), TG (OAPI
  • Double nozzle consisting of a main nozzle (1) and a flap nozzle (2), coaxially located and operating in conjunction wit main nozzle (1), comprising an opening (6) formed between the two nozzle profiles by the thin part (la) of main nozzle (1) an the front part (2a) of flap nozzle (2), said opening (6) extending rearwardly and inwardly.
  • Main nozzle (1) and flap nozzle (2 may be interconnected by extended parts ofthe nozzle construction, such as radial stiffening plates.
  • Double nozzle Double nozzle
  • This invention relates to the propulsion of waterborne vessels employing propellers surrounded by one or more shrouds.
  • Shrouded propellers sometimes referred to as nozzle propellers or propellers in so-called Kort nozzles are known since several decades. Two types can be distinguished. One type in which the shroud is connected to the blade tips and therefore rotates with the propeller - this type is known as ring propeller - and the other type in which the shroud is stationary and fixed to the hull of the ship.
  • the Hannon slot does not yield any increase of the effective diffusor angle whereby the efficiency improvement of the present invention is achieved;
  • the openings of the Hannon slot cover the circumference of the nozzle only in part - mentioned is 25% - whereas the present invention envisages an opening over the complete circumference.
  • This double nozzle consists of a main nozzle, in which the propeller rotates, and a second nozzle rearward of the main nozzle viewed in the ahead direction, and acting as a flap to the main nozzle, whereby the opening between the main nozzle and the flap extends inwardly and rearwardly, which in effect causes the improvement of the propulsive efficiency.
  • the inner surfaces of the two nozzle parts are lying on a common smooth curve.
  • Both parts of the double nozzle i.e. the main nozzle and the flap nozzle, are preferably connected to each other, although they may be independently connected to the hull of the ship by known means. The connection may consist, for instance, by entended radial stiffening plates of the main nozzle reaching into the construction of the flap nozzle.
  • Figure 1 shows a longitudinal section of a double nozzle according to the invention
  • Figure 2 shows a similar section in more detail.
  • Figure 1 shows the double nozzle, consisting of a main nozzle 1 and a flap nozzle 2, which are connected to a hull 3 of a ship by appropriate means (not shown). Inside the main nozzle operates a propeller, having blades 4 mounted on a hub 5, driven by a shaft (not shown) in a known manner. Seen in the axial direction, the main nozzle has a circular shape. The thickness of the profile of main nozzle 1 is reduced towards its rear end and its thinner part overlaps in part the front part of flap nozzle 2, the opening 6 between the two nozzle profiles extending rearwardly and inwardly.
  • FIG. 2 Further detail of the latter is shown in Figure 2, wherein main nozzle 1 and flap nozzle 2 are shown (without applied connecting parts) and the opening 6 between the two nozzle profiles. Said opening is formed by the thin part la of main nozzle 1 and front part 2a of flap nozzle 2.
  • the double nozzle according to the invention can be applied in various combinations with the propeller.
  • the most usual one is to locate the propeller inside main nozzle 1, but in special cases the propeller may be located aft of main nozzle 1.
  • the propeller can be fixed pitch or of controllable pitch type.
  • the double nozzle may be attached to the blade tips so that both rings will rotate with the propeller.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Nozzles (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Toys (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

L'invention concerne un ajutage double composé d'un ajutage principal (1) et d'un ajutage à clapet (2) placé coaxialement et fonctionnant conjointement avec l'ajutage principal (1), comprenant une ouverture (6) formée entre les deux profilés d'ajutage par la partie mince (1a) de l'ajutage principal (1) et la partie frontale (2a) de l'ajutage à clapet (2), ladite ouverture (6) s'étendant vers l'arrière et vers l'intérieur. L'ajutage principal (1) et l'ajutage à clapet (2) peuvent être reliés par des parties prolongées de la construction de l'ajutage, telles que des plaques de raidissement radiales.
PCT/NL1989/000039 1988-06-01 1989-06-01 Double ajutage WO1989011998A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE68911913T DE68911913T2 (de) 1988-06-01 1989-06-01 Verdoppelte leitdüse.
KR1019900700099A KR900701602A (ko) 1988-06-01 1989-06-01 이중 노즐

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL8801402 1988-06-01
NL8801402A NL8801402A (nl) 1988-06-01 1988-06-01 Dubbele straalbuis.

Publications (1)

Publication Number Publication Date
WO1989011998A1 true WO1989011998A1 (fr) 1989-12-14

Family

ID=19852387

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NL1989/000039 WO1989011998A1 (fr) 1988-06-01 1989-06-01 Double ajutage

Country Status (6)

Country Link
EP (1) EP0411056B1 (fr)
KR (1) KR900701602A (fr)
AU (1) AU3758989A (fr)
DE (1) DE68911913T2 (fr)
NL (1) NL8801402A (fr)
WO (1) WO1989011998A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013178853A2 (fr) 2012-05-30 2013-12-05 Romero Vazquez Juan Jose Tuyère fixe symétrique d'accélération pour vaisseaux aquatiques en condition de navigation libre
US11352112B2 (en) 2017-12-20 2022-06-07 Juan José ROMERO VÁZQUEZ Accelerating ducted propeller system for propelling boats

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE447117A (fr) *
DE883255C (de) * 1950-02-07 1953-07-16 Erich Grundt Ummantelung fuer Schraubenpropeller
DE941048C (de) * 1941-12-28 1956-03-29 Josef Neukamm Leitduese fuer Schiffe mit Schraubenantrieb
FR1381494A (fr) * 1963-10-29 1964-12-14 Perfectionnements aux propulseurs de navires
GB1324356A (en) * 1969-09-05 1973-07-25 Lips Nv Propulsion of water borne vessels
US4637801A (en) * 1984-07-12 1987-01-20 William H. Flood Thrust enhancing propeller duct assembly for water craft

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE447117A (fr) *
DE941048C (de) * 1941-12-28 1956-03-29 Josef Neukamm Leitduese fuer Schiffe mit Schraubenantrieb
DE883255C (de) * 1950-02-07 1953-07-16 Erich Grundt Ummantelung fuer Schraubenpropeller
FR1381494A (fr) * 1963-10-29 1964-12-14 Perfectionnements aux propulseurs de navires
GB1324356A (en) * 1969-09-05 1973-07-25 Lips Nv Propulsion of water borne vessels
US4637801A (en) * 1984-07-12 1987-01-20 William H. Flood Thrust enhancing propeller duct assembly for water craft

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013178853A2 (fr) 2012-05-30 2013-12-05 Romero Vazquez Juan Jose Tuyère fixe symétrique d'accélération pour vaisseaux aquatiques en condition de navigation libre
US11352112B2 (en) 2017-12-20 2022-06-07 Juan José ROMERO VÁZQUEZ Accelerating ducted propeller system for propelling boats

Also Published As

Publication number Publication date
EP0411056B1 (fr) 1993-12-29
DE68911913D1 (de) 1994-02-10
KR900701602A (ko) 1990-12-03
EP0411056A1 (fr) 1991-02-06
AU3758989A (en) 1990-01-05
DE68911913T2 (de) 1994-05-26
NL8801402A (nl) 1990-01-02

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