EP0540868A1 - Dispositif de guidage de l'écoulement - Google Patents

Dispositif de guidage de l'écoulement Download PDF

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Publication number
EP0540868A1
EP0540868A1 EP92115977A EP92115977A EP0540868A1 EP 0540868 A1 EP0540868 A1 EP 0540868A1 EP 92115977 A EP92115977 A EP 92115977A EP 92115977 A EP92115977 A EP 92115977A EP 0540868 A1 EP0540868 A1 EP 0540868A1
Authority
EP
European Patent Office
Prior art keywords
propeller
flow guiding
guiding device
flow
casing
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.)
Granted
Application number
EP92115977A
Other languages
German (de)
English (en)
Other versions
EP0540868B1 (fr
Inventor
Herbert Prof. Dr.-Ing. Schneekluth
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.)
Dudszus Alfred
Original Assignee
Dudszus Alfred
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 Dudszus Alfred filed Critical Dudszus Alfred
Publication of EP0540868A1 publication Critical patent/EP0540868A1/fr
Application granted granted Critical
Publication of EP0540868B1 publication Critical patent/EP0540868B1/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
    • B63H5/14—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
    • B63H5/15—Nozzles, e.g. Kort-type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H25/00—Steering; Slowing-down otherwise than by use of propulsive elements; Dynamic anchoring, i.e. positioning vessels by means of main or auxiliary propulsive elements
    • B63H25/06—Steering by rudders
    • B63H25/38—Rudders
    • B63H25/381—Rudders with flaps
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H25/00—Steering; Slowing-down otherwise than by use of propulsive elements; Dynamic anchoring, i.e. positioning vessels by means of main or auxiliary propulsive elements
    • B63H25/06—Steering by rudders
    • B63H25/38—Rudders
    • B63H2025/387—Rudders comprising two or more rigidly interconnected mutually spaced blades pivotable about a common rudder shaft, e.g. parallel twin blades mounted on a pivotable supporting frame

Definitions

  • the invention relates to a flow control device for ship propellers in the form of a propeller casing, which is fixedly or rotatably connected to the ship.
  • Flow control devices for ship propellers are known in different designs.
  • full-ring nozzles with a wing profile such as Kort nozzles, are used, which enclose the entire propeller circle as closed rings.
  • These arrangements significantly improve the propulsion quality for ships with higher levels of thrust, such as tugs, push boats or trawlers, for lower ship speeds and higher levels of thrust.
  • Their use in ship types with lower degrees of thrust and higher ship speeds, such as freight and passenger ships or ferry ships, is limited by the inherent resistance of the full ring nozzle, which increases roughly square with the ship speed.
  • the criteria for the use of Kort nozzles are "load levels", in which there is a power in the numerator or thrust, in the denominator a product in which the inflow velocity is in the third or second power.
  • the criterion for the use of Kort nozzles the inflow velocity averaged over the propeller disk area is normally taken into account for the inflow velocity. If the effect of the Kort nozzle is now limited to the upper half of the propeller disk area, the local inflow velocity prevailing in this area is to be expected, which, depending on the shape of the ship, is considerably lower than the mean inflow velocity. This means that for the upper half of the nozzle the number for the propeller load increases in comparison to the case with a number for the entire Kort nozzle. In many cases, a small gain from a full ring Kort nozzle means that there is a large gain for the upper sector and a small loss for the lower sector.
  • the object of the invention is to provide an improvement of generic arrangements which enables propulsion to be improved and which can be used to reduce propeller-induced vibrations and which ensures subsequent installation in a simple manner.
  • the saddle nozzle also has the advantage over the Kort nozzle that an increased spacing of the propeller wing tips from the base line need not be required.
  • a saddle nozzle With the usual configuration of the hull, propeller and rudder, a saddle nozzle must always be accommodated.
  • the performance savings that can be achieved with the saddle nozzle are more than 10% for the ship types under consideration and thus more than the profits from other propulsion-improving measures.
  • Cavitation can also develop in this arrangement according to the invention.
  • the effect of the cavitation bubbles formed on the inner wall of the nozzle is alleviated in two ways by the circumferential grooves.
  • the grooves swirl the boundary layer more, so that larger cavitation bubbles are broken down into many smaller ones, causing the implosions to lose strength in detail.
  • the cavitation bubbles such as floating objects, are also pushed away from the inner wall of the nozzle.
  • the smallest inside diameter of the nozzle does not have to lie in the propeller area since the saddle nozzle can be lifted over the propeller when it is installed.
  • the nozzle nose is cheap to give a slightly larger radius, since the direction of flow here shows greater differences than usual for aircraft wings.
  • the profile of the saddle nozzle is formed as a single-profile from essentially cylindrical and conical surfaces, as developed by Schuschkin and Heuser.
  • a favorable design can consist in that the saddle nozzle or the fins have end plates or winglets.
  • the approximately radially arranged flow guide surfaces as fins have a static and a hydrodynamic task. These fins statically stiffen the saddle nozzle, and the connection to this saddle nozzle in turn protects the fins from excessive stresses in the sea. When arranged in front of the saddle nozzle, the fins hydrodynamically give the propeller inflow a pre-twist against the direction of rotation of the propeller, so that the flow leaves the propeller with less swirl losses. If the fins are arranged behind the propeller in a rotatable arrangement, they recover part of the swirl energy from the propeller outflow.
  • the fins can be designed so that they take on other tasks. They can be arranged so strongly swept that they serve as ice deflectors. Furthermore, they can also be pulled in the manner of so-called Grothues spoilers on the side facing the ship's hull with their leading edge so that they divert the downward flow that is often present on the ship's outer skin in the propeller area more into the horizontal.
  • a certain sweep is usually advisable so that the average distance between the rear edge of the fins and the propeller is not too small.
  • DE-OS 19 38 480 shows a Kort nozzle as a propeller casing, an annular groove running in the inner wall of the nozzle being arranged with a swirl against the propeller pitch.
  • a combination is also known from GB 2 063 378 A1, end plates forming an extension of a pre-nozzle. Furthermore, from DE-Z Hansa No. 19, 1962, page 1841, it can be seen that a full ring nozzle with a fixedly connected rudder is reinforced by surfaces attached to the side of the nozzle.
  • the illustrated contour of a ship's hull 1 with a construction water line 9 is provided with a rudder spur 2, which carries an oar 3.
  • a propeller 4 with a propeller hub 5 is arranged and has a propeller wing tip circle 14.
  • the propeller 4 is assigned a propeller casing 6 in the manner of a saddle nozzle.
  • the propeller casing 6 is connected with the interposition of a connecting element 8 with the stern or the gill of the hull 1.
  • the frame contour 11 is shown in FIG. 2 as a connection zone.
  • At the front end of the propeller casing 6 there is a horizontal flow guide surface 7 connected to its end regions, which is guided approximately radially over the region of the stern tube.
  • the propeller casing 6 has grooves 10 on the side facing the propeller 4. According to FIGS. 4 and 5 additionally arranged in partial areas of grids 13, which form corresponding recesses 12.
  • the arrangement of grids 12, 13 in the lower region of the propeller casing 6 reduces the triggering of pressure pulses when the propeller blades are knocked past.
  • the pressure impulses are caught by the wall behind. This means that for the flow the gap between the wing tip and the inner wall of the nozzle is small, for the pressure impulses the wall distance from the wing tip does not change suddenly.
  • the continuation of the nozzle profile is designed with an increasing distance between the inside of the nozzle and the propeller wing tip circle 14, the entry and exit area increasing to at least 4% of the propeller radius.
  • the lower parts of the propeller shell can be formed from a flexible material, so that the impulses emanating from the wing tips are transmitted less.
  • propeller casing 6 may also be expedient to arrange the propeller casing 6 taking into account the following instructions: Since the propeller inflow is usually directed slightly upwards and the flow converges from the top towards the center, it makes sense to adapt the nozzle profile direction to the flow direction.
  • the position of the propeller casing and the horizontal flow guide surface 7 is determined in accordance with the existing conditions. In terms of length, it should often be favorable for about two-thirds to three-quarters of the propeller sheath 6 to be in front of the propeller tip circle 14. For statics and rigidity of the construction, it is advantageous if the horizontal guide surface 7 projects into the propeller casing. The rear edge of the horizontal flow guide surface 7 should be arranged to the rear as far as the power saving and vibration security allow. If necessary, a connecting element must be created between the flow guide surface 7 and the propeller casing 6.
  • the profile shape of the propeller casing 6 is to be adapted to the shape of the ship and propeller, as well as the propeller load. Since the propeller 4 is not fully encased, the use of a Kaplan propeller makes little sense.
  • the flow guide surface 6 is rotatably arranged on the hull 1 via a bearing 15.
  • the rudder 3 on the rudder horn 2 is also pivoted.
  • the direction of flow is identified by reference number 16.
  • FIG. 9 a flow guide device 6 for a double screw arrangement is shown in FIG. 9.

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)
  • Toys (AREA)
EP92115977A 1991-11-02 1992-09-18 Dispositif de guidage de l'écoulement Expired - Lifetime EP0540868B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4136245 1991-11-02
DE4136245 1991-11-02

Publications (2)

Publication Number Publication Date
EP0540868A1 true EP0540868A1 (fr) 1993-05-12
EP0540868B1 EP0540868B1 (fr) 1996-04-17

Family

ID=6444037

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92115977A Expired - Lifetime EP0540868B1 (fr) 1991-11-02 1992-09-18 Dispositif de guidage de l'écoulement

Country Status (4)

Country Link
EP (1) EP0540868B1 (fr)
CN (1) CN1072146A (fr)
DE (2) DE4138281C1 (fr)
PL (1) PL296437A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2302317B (en) * 1995-06-16 1999-03-10 Christopher Roger Hill Steering mechanism
CN102009322A (zh) * 2010-06-04 2011-04-13 沪东中华造船(集团)有限公司 一种连接式挂舵臂导流装置的制造方法
KR20150034326A (ko) * 2013-09-26 2015-04-03 대우조선해양 주식회사 비틀림 스트럿 및 그 비틀림 스트럿의 설치구조
CN104625447A (zh) * 2014-12-19 2015-05-20 华泰重工(南通)有限公司 一种扇形导管安装工艺
CN106275339A (zh) * 2016-08-29 2017-01-04 上海孚实船舶科技有限公司 船用推进导向装置

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4325290A1 (de) * 1993-07-28 1995-02-02 Dudszus Alfred Prof Dr Ing Hab Nachstromdüse
DE19746853C2 (de) * 1997-10-23 2002-06-27 Stahl Und Maschb Gmbh Hochleistungs-Vollschweberuder
CN100348457C (zh) * 2002-06-28 2007-11-14 韩国防 一种坐式半浮体加滑行板式摩托艇
WO2012073614A1 (fr) 2010-12-02 2012-06-07 三菱重工業株式会社 Navire
JP6583820B2 (ja) * 2015-11-02 2019-10-02 三井Ｅ＆Ｓ造船株式会社 船尾整流構造及び船舶

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE114831C (fr) *
DE755002C (de) * 1938-05-10 1951-08-02 Adolf Friederichs Duese fuer frei fahrende Einschraubenschiffe
CH326840A (de) * 1954-08-18 1957-12-31 Ostermann & Co Abdeckschirm einer Schiffsschraube
DE2702116A1 (de) * 1977-01-20 1978-07-27 Versuchsanstalt Fuer Binnensch Selbstabweisende propellerduese fuer schiffspropeller
GB2063378A (en) * 1979-11-02 1981-06-03 Espanoles Astilleros Propulsion apparatus
EP0265645A1 (fr) * 1986-10-03 1988-05-04 Herbert Prof. Dr.-Ing. Schneekluth Surface de guidage de filets d'eau

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1018741B (de) * 1955-09-03 1957-10-31 L Kort Dipl Ing Schraubensteven fuer Schiffe mit Duesenruder
DE1938480A1 (de) * 1969-07-29 1971-02-18 Schmidt Stiebitz Hermann Dr In Sicherheitsduese
DD95984A1 (fr) * 1971-10-22 1973-02-20
DE3216578C1 (de) * 1982-05-04 1983-10-13 Herbert Prof. Dr.-Ing. 5100 Aachen Schneekluth Stroemungsleitflaeche am Heck von Einschraubenschiffen
DD238586A1 (de) * 1985-06-24 1986-08-27 Akad Wissenschaften Ddr Anordnung zur verbesserung der energieumwandlung durch den propeller
DD241056A1 (de) * 1985-09-23 1986-11-26 Schiffbau Stammbetrieb K Vorrichtung zur erhoehung des wirkungsgrades von schiffspropellern

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE114831C (fr) *
DE755002C (de) * 1938-05-10 1951-08-02 Adolf Friederichs Duese fuer frei fahrende Einschraubenschiffe
CH326840A (de) * 1954-08-18 1957-12-31 Ostermann & Co Abdeckschirm einer Schiffsschraube
DE2702116A1 (de) * 1977-01-20 1978-07-27 Versuchsanstalt Fuer Binnensch Selbstabweisende propellerduese fuer schiffspropeller
GB2063378A (en) * 1979-11-02 1981-06-03 Espanoles Astilleros Propulsion apparatus
EP0265645A1 (fr) * 1986-10-03 1988-05-04 Herbert Prof. Dr.-Ing. Schneekluth Surface de guidage de filets d'eau

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
HANSA-SCHIFFAHRT-SCHIFFBAU-HAFEN Bd. 111, Nr. 11, 1974, Seite 1008 C.BUHTZ 'Kombination von Ruderd}se und Anlenkflosse' *
PATENT ABSTRACTS OF JAPAN vol. 11, no. 175 (M-596)(2622) 5. Juni 1987 *
SOVIET PATENTS ABSTRACTS Section PQ, Week C31, 10. September 1980 Derwent Publications Ltd., London, GB; Class Q, AN G6988 & SU-A-694 424 (N.AVRASHKOV) *
THE THIRD INTERNATIONAL SYMPOSIUM ON PRACTICAL DESIGN OF SHIPS AND MOBILE UNITS Bd. 1, Juni 1987, TRONDHEIM Seiten 165 - 166 E.J.STIERMAN 'The design of an energy saving wake adapted duct' *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2302317B (en) * 1995-06-16 1999-03-10 Christopher Roger Hill Steering mechanism
CN102009322A (zh) * 2010-06-04 2011-04-13 沪东中华造船(集团)有限公司 一种连接式挂舵臂导流装置的制造方法
CN102009322B (zh) * 2010-06-04 2012-05-30 沪东中华造船(集团)有限公司 一种连接式挂舵臂导流装置的制造方法
KR20150034326A (ko) * 2013-09-26 2015-04-03 대우조선해양 주식회사 비틀림 스트럿 및 그 비틀림 스트럿의 설치구조
KR102130721B1 (ko) 2013-09-26 2020-08-05 대우조선해양 주식회사 비틀림 스트럿 및 그 비틀림 스트럿의 설치구조
CN104625447A (zh) * 2014-12-19 2015-05-20 华泰重工(南通)有限公司 一种扇形导管安装工艺
CN104625447B (zh) * 2014-12-19 2016-08-24 华泰重工(南通)有限公司 一种扇形导管安装工艺
CN106275339A (zh) * 2016-08-29 2017-01-04 上海孚实船舶科技有限公司 船用推进导向装置

Also Published As

Publication number Publication date
DE4138281C1 (fr) 1993-04-29
CN1072146A (zh) 1993-05-19
PL296437A1 (en) 1993-06-28
EP0540868B1 (fr) 1996-04-17
DE59206029D1 (de) 1996-05-23

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