EP2060482B1 - Kortdüse - Google Patents

Kortdüse Download PDF

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Publication number
EP2060482B1
EP2060482B1 EP07023946A EP07023946A EP2060482B1 EP 2060482 B1 EP2060482 B1 EP 2060482B1 EP 07023946 A EP07023946 A EP 07023946A EP 07023946 A EP07023946 A EP 07023946A EP 2060482 B1 EP2060482 B1 EP 2060482B1
Authority
EP
European Patent Office
Prior art keywords
openings
kort nozzle
kortdüse
kort
nozzle
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.)
Active
Application number
EP07023946A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2060482A1 (de
Inventor
Mathias Kluge
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.)
Becker Marine Systems GmbH and Co KG
Original Assignee
Becker Marine Systems 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
Application filed by Becker Marine Systems GmbH and Co KG filed Critical Becker Marine Systems GmbH and Co KG
Priority to PL07023946T priority Critical patent/PL2060482T3/pl
Publication of EP2060482A1 publication Critical patent/EP2060482A1/de
Application granted granted Critical
Publication of EP2060482B1 publication Critical patent/EP2060482B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B63H5/14—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
    • 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
    • B63H25/42—Steering or dynamic anchoring by propulsive elements; Steering or dynamic anchoring by propellers used therefor only; Steering or dynamic anchoring by rudders carrying propellers
    • 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
    • B63H25/46—Steering or dynamic anchoring by jets or by rudders carrying jets

Definitions

  • the present invention relates to a Kortdüse, in particular such Kortdüse, which is designed to be rotatable about the rudder axis of a ship.
  • a Kortdüse is a tapered tube in which the propeller of a ship is arranged.
  • the tube also forms the wall of the Kortdüse.
  • the Kort nozzles can transfer an extra thrust to the ship without increasing the workload.
  • the propulsion-enhancing properties of the Kortdüse thereby also ramming movements are reduced in sea state, which can be reduced in heavy seas, the speed losses and the price stability can be increased. Since the drag of the Kortdüse increases approximately quadratically with increasing ship speed, its advantages are particularly effective in slow ships that have a large propeller thrust (for example, tugs, fishing vessels, etc.).
  • Kort-rowing nozzles In addition to fixed Kortdüsen, behind which in the flow direction usually a rudder is arranged to control the ship, there are so-called “Kort-rowing nozzles" in which the Kortdüse about the rudder axis of the ship, which is in the vertical direction, is rotatable. For this purpose, bearings are provided for rotatable mounting usually on the top and bottom of the Kortdüse on the outside of its wall. The propeller, on the other hand, remains stationary so that the Kort nozzle also rotates around the propeller. Often the Kort rudder nozzle is connected to the rudder stock and stored in the hoe.
  • the Kort rudder nozzle is a combination of propulsion enhancing agent and rudder, as a rudder effect is achieved by the deflection of the propeller jet at an angle to the ship's longitudinal axis. With deflected Kort-rudder nozzles The stern of the ship is pushed around by the jet recoil.
  • Fig. 5 1 illustrates an embodiment of a Kortdüse 200 rotatably mounted about the rudder axis of a ship with a fixed propeller therein as known in the prior art.
  • the Kortdüse 200 is arranged around the fixed ship propeller 210 of a ship (not shown here).
  • the Kortdüse is pivoted at an angle ⁇ of about 30 ° about the ship's longitudinal axis 220.
  • the arrow 221 represents the flow direction of the seawater.
  • a fixed fin 230 is provided on the Kortdüse 200, by means of which the flow properties of the Kort rudder nozzle are positively influenced.
  • the entrance area 201 (with respect to the direction of the flow rate through the Kortdüse 200) of the Kortdüse 200 is formed extended opposite to the remaining portion of the Kortdüse 200. This means that the inner diameter of the entrance area is larger than the inner diameter in the remaining area of the Kortdüse 200. This increases the water flow through the Kortdüse 200, which in turn improves the Korddüse Propulsionseffizienz.
  • a Kortdüse known which is designed as a rudder Kortdüse. Distributed over the circumference of the nozzle a plurality of openings is arranged through which water can flow, which in turn should improve the drive power of the Kortdüse.
  • the US 442,615 A shows a fixed, a ship propeller jacketing nozzle, which has distributed around its circumference a plurality of openings for the passage of water, whereby the efficiency of the propeller drive is to be increased.
  • Fig. 6a schematically shows the top view of a cut Kortdüse 200, as is known in the prior art.
  • the arrows in Fig. 6a and 6b represent the course of the flow.
  • the ship's propeller 210 is shown only schematically for clarity.
  • this Kortdüse 200 is in contrast to the Kortdüse Fig. 5 arranged in the flow direction behind the propeller 210, a movable or pivotable fin 231.
  • the illustrated Kortdüse 200 is pivoted at an angle of about 15 ° with respect to the ship's longitudinal axis.
  • the lower part of the wall 202a of the Kortdüse 200 has been rotated against the flow direction, ie towards the propeller 210, while the opposite part of the wall 202b has been rotated according to the flow direction.
  • the lower one in the Fig. 6a marked portion of the Kortdüse 200 is enlarged in the Fig. 6b shown. It can be seen that due to the angular position of the Kortdüse 200 with respect to the propeller 210 and the ship's longitudinal axis 220, a turbulence or recirculation of the flow in the outer edge region in the flow direction directly behind the propeller 210 sets. This recirculation minimizes the average flow velocity in the main flow direction 221 in this local area. Measurements and simulations have shown that an average flow velocity in the main flow direction 221 of approximately 0.2 to 2 m / s is established in this region. In comparison, for example, the average Speed of the flow in the area between the fin 231 and the wall region 202b 12 to 16 m / s.
  • the water which flows along the outside of the wall 202a in a laminar manner, flows inwards around the rounded edge of the wall of the Kortdüsenend Schemees 203 and meets there, generated by the propeller 210, directed in the main flow direction 221 flow.
  • a portion of the outer flow is directed inwardly against the main flow direction 221 and flows on the inside of the wall 202 against the main flow direction 221 to behind the propeller 210 and from there back through the propeller 210 therethrough.
  • a local circulation or recirculation of the flow sets in and the average flow velocity in the main flow direction 221 in this area approaches zero.
  • the disadvantages described above occur.
  • the core idea of the present invention is therefore to provide two, four or six openings in the wall of the Kortdüse.
  • Openings is in the present context basically any, arbitrarily designed opening in the wall of the Kortdüse view.
  • the opening runs through the entire wall and thus consists of an inner and an outer opening area and a central area connecting these two areas.
  • the decisive factor is that there is a flow connection for the seawater or seawater is created from outside the Kortdüse through the at least one opening into the interior of the Kortdüse.
  • the wall of the Kortdüse is formed by the actual nozzle ring, which sheathes the fixed propeller.
  • the apertures are provided in a lateral region of the Kortdüse, either on the starboard side or on the port side. It is crucial that the perforations are designed and placed or placed in the wall so that through the openings seawater or seawater from outside the Kortdüse can flow through them into the interior of the Kortdüse such that thereby the recirculations or turbulences, which arise at certain Verschwenkungswinkeln the Kortdüse be repealed or significantly reduced.
  • the openings thus introduce a laminar flow from the outside in the critical side areas of the Kort nozzle, in which the turbulences typically occur at certain pivoting angles.
  • This laminar flow prevents a recirculation flow from forming in the side regions against the main flow direction.
  • the thrust and running stability and thus the efficiency of Kortdüse be significantly improved.
  • the openings are arranged in a central region.
  • the middle region extends from one third of the height of the Kort nozzle to about two thirds of the Kort nozzle, preferably from two fifths to three fifths of the height of the Kort nozzle.
  • the openings are arranged in the area in which the turbulences typically occur.
  • a central arrangement of the apertures is provided with respect to the height of the Kortdüse.
  • the height of the Kortdüse corresponds to its vertical extent in the installed state, d. H. the distance between the opposing wall portions of the Kortdüse along its vertical axis or along the rudder axis.
  • the central areas of the Kortdüse extend in their longitudinal extent over the entire length of the Kortdüse. Thus, there are a total of two central areas, which are arranged opposite to each other. According to The invention is intended to arrange one, two or three openings in each of these two central regions. If two or three apertures are provided per central region, apertures are preferably arranged one behind the other in the longitudinal direction of the Kort nozzle and / or arranged one above the other in the vertical direction. Depending on the configuration of the Kortdüse and the propeller and the desired pivot angle, thereby the result to be achieved, namely the improvement of the thrust and the smoothness of Kortdüse be optimized. Furthermore, the openings of the two central regions are arranged opposite one another. This ensures that the risk of the occurrence of turbulence or recirculation is reduced both when pivoting to the starboard side and when pivoting to the port side.
  • the invention provides that the openings, based on the main flow direction, extend obliquely from outside to inside through the wall. This means that the center line of the openings is aligned at a predetermined angle to the main flow direction or to the longitudinal axis of the Kortdüse. This ensures that the outer laminar flow flows from the outside to the inside into the Kortdüse and no water from the inside to the outside through the openings.
  • the openings with respect to the longitudinal axis of the Kortdüse at an angle of 10 ° to 60 °, preferably 20 ° to 45 °, particularly preferably 30 ° to 35 °.
  • the angle data refer to the angle between the longitudinal axis of the Kortdüse and the center line of the respective aperture, which runs from outside to inside through the respective opening.
  • the apertures in a range of one-third to two-thirds of the length, preferably two-fifths to three-fifths of the length, more preferably centrally to arrange.
  • a pivotable Kortdüse with a fixed propeller arranged therein, it is further preferred to form the openings such that it is arranged at a Verschwenkungswinkel of 10 °, 15 ° or 20 ° with its inner opening portion substantially adjacent to the propeller.
  • a Verschwenkungswinkel of 10 °, 15 ° or 20 ° with its inner opening portion substantially adjacent to the propeller.
  • the openings are formed as elongated slots. Furthermore, it is advantageous that the slot-like openings extend substantially in the vertical direction. This ensures that a vertically aligned flow band flows from outside to inside into the Kortdüse and thus possibly as far as the entire critical area, in which normally turbulences form, can positively influence. Furthermore, such openings are relatively easy to manufacture.
  • the apertures taper from the outside of the wall or its outer opening area to its inner opening area on the inner side of the wall.
  • the openings may be formed substantially constant over their entire course.
  • each aperture for example in the case of a slot-like, vertically aligned opening, has two vertically aligned inflow edges and two vertically aligned trailing edges.
  • the Fig. 1a shows a perspective view of a Kortdüse 100, which is pivotally mounted on a ship's hull 10.
  • the hull 10 is only partially shown for the sake of clarity.
  • the Kortdüse is connected via a bearing 12 with the hull 10 and is rotatable about the rudder axis 11.
  • the rudder axis 11 corresponds to the vertical axis.
  • the Kortdüse 100 is further connected in its lower part via another camp with the hull (not shown here).
  • a movable or controllable fin 14 connects at the end of the Kort nozzle 100.
  • the Kortdüse 100 comprises an annular wall 15 which is conical and tapers in the flow direction 13.
  • an opening 16 is arranged in each case. Relative to the height, the openings 16 are arranged substantially centrally.
  • the openings 16 extend in the flow direction 13 viewed obliquely from outside to inside. They consist of a substantially vertical running Slit that tapers from the outside inwards.
  • the overall result is an approximately blade-like appearance of the openings 16, since the outer opening portion 16a, due to the taper of the opening 16, opposite the inner opening portion 16b is wider.
  • the propeller is in the Fig. 1a omitted for clarity, but is arranged in the installed state within the Kortdüse 100.
  • Fig. 1b shows a cut portion of the Kortdüse 100 of the Fig. 1a ,
  • the wall in the illustration of the Fig. 1b cut in the region of an opening 16.
  • the opening 16 runs obliquely in the flow direction from outside to inside and that it tapers inwards. Accordingly, the outer opening portion 16a is wider than the inner opening portion 16b.
  • the rear inflow edge 17a is rounded, while the front inflow edge 17b has an angular course.
  • the trailing edge 18a in the direction of flow 13 is rounded, while the front trailing edge 18b is edged.
  • the outer opening portion 16a and the inner opening portion 16b of the opening offset from each other, in particular laterally offset, arranged.
  • the inner opening portion 16b is concealed with respect to a side view of the Kortdüse 100, from the oblique side walls of the opening 16 and 15 of the wall.
  • the opening is formed as a slot-like channel which extends in the flow direction 13 obliquely from the inside to the outside.
  • Fig. 2a shows a perspective view of another embodiment of a Kortdüse 100.
  • the fin 14 is mounted both in the upper rudder bearing 12 and in a lower fin bearing on the Kortdüse 100.
  • the central regions 15a, 15b of the wall 15 are each two openings 16 arranged, which are arranged one behind the other in the ship's longitudinal direction with not deflected Kortdüse or Kortdüsenlteilsraum. It is in Fig. 2a recognizable that only the outer opening portion of the openings 16 visible from the outside and the inner opening area is covered. Accordingly, the outer and the inner opening portion of the opening 16 in the flow direction 13 are arranged one behind the other.
  • Fig. 2b shows a sectional view of the Kortdüse 100 from Fig. 2a , It can be seen that the openings 16 in the two middle regions 15a, 15b of the wall 15 are respectively arranged opposite one another. Furthermore, these openings 16 extend obliquely in the flow direction 13 from outside to inside. The individual openings 16 are each formed identically and thus run parallel to each other.
  • Fig. 3 shows a further embodiment of a Kortdüse 100.
  • a Kortdüse 100 in each central region 15a, 15b of the wall 15 of the Kortdüse three vertically arranged one above the other openings 16 are provided. Viewed in the longitudinal direction of the Kortdüse 100, the openings 16 are each arranged centrally. The distance between the individual openings 16 of a central region 15a, 15b is approximately the same in each case.
  • Fig. 4 shows a flow pattern of a side region of a Kortdüse 100 with a part of a schematically illustrated propeller 20.
  • Fig. 4 similar to the one out Fig. 6b , in contrast to the representation of Fig. 6b a Kortdüse invention with an opening 16 was used.
  • the illustrated arrows symbolize the flow pattern of the water flowing through the Kortdüse.
  • water flows from outside to inside through the opening 16.
  • As it exits the inner opening portion 16b of the aperture 16 it continues to flow along the inside the wall 15, until it finally leaves the Kortdüse 100.

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  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Continuous Casting (AREA)
  • Nozzles (AREA)
  • Ship Loading And Unloading (AREA)
  • Hydraulic Turbines (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Soil Working Implements (AREA)
  • Spray Control Apparatus (AREA)
  • Prevention Of Electric Corrosion (AREA)
  • Casting Devices For Molds (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Road Repair (AREA)
EP07023946A 2007-11-16 2007-12-11 Kortdüse Active EP2060482B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL07023946T PL2060482T3 (pl) 2007-11-16 2007-12-11 Dysza Korta

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202007016163U DE202007016163U1 (de) 2007-11-16 2007-11-16 Kortdüse

Publications (2)

Publication Number Publication Date
EP2060482A1 EP2060482A1 (de) 2009-05-20
EP2060482B1 true EP2060482B1 (de) 2012-05-02

Family

ID=38973604

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07023946A Active EP2060482B1 (de) 2007-11-16 2007-12-11 Kortdüse

Country Status (13)

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US (2) US20090130927A1 (ja)
EP (1) EP2060482B1 (ja)
JP (1) JP5184907B2 (ja)
KR (1) KR101216919B1 (ja)
CN (1) CN101434292B (ja)
AT (1) ATE555979T1 (ja)
DE (1) DE202007016163U1 (ja)
ES (1) ES2386467T3 (ja)
HK (1) HK1129640A1 (ja)
HR (1) HRP20120601T1 (ja)
PL (1) PL2060482T3 (ja)
SG (1) SG152959A1 (ja)
TW (1) TWI356791B (ja)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010002213A1 (de) * 2010-02-22 2011-10-06 Becker Marine Systems Gmbh & Co. Kg Drehbarer Düsenpropeller für Wasserfahrzeuge
DE102011053619A1 (de) * 2011-09-14 2013-03-14 Becker Marine Systems Gmbh & Co. Kg Propellerdüse für Wasserfahrzeuge
CN102501960A (zh) * 2011-11-15 2012-06-20 无锡德林船舶设备有限公司 导管舵传动装置
CN104554684B (zh) * 2015-01-06 2017-05-17 舟山欣臻船舶设计有限公司 一种多功能船用导流罩
ES2745123T3 (es) 2015-04-28 2020-02-27 Kongsberg Maritime CM AS Boquilla de unidad de propulsión modular
CN105240670B (zh) * 2015-11-13 2018-03-06 中国船舶重工集团公司第七二六研究所 水下吊放装置的湿端结构
JP1575726S (ja) * 2016-10-31 2017-05-08
CN109050853B (zh) * 2018-08-10 2021-02-19 哈尔滨工程大学 一种船用可拆导管螺旋桨
JP7216531B2 (ja) * 2018-12-07 2023-02-01 株式会社ケイセブン 操舵装置
CN110040231A (zh) * 2019-05-13 2019-07-23 哈尔滨工程大学 一种用于船后螺旋桨的不对称导管
CN110282107A (zh) * 2019-07-02 2019-09-27 哈尔滨工程大学 一种可分离式船用导管螺旋桨
CN110949643A (zh) * 2019-11-25 2020-04-03 中国船舶工业集团公司第七0八研究所 一种带尾叶的舵桨装置
DE102020107038A1 (de) * 2020-03-13 2021-09-16 Torqeedo Gmbh Verfahren und Vorrichtung zum Einstellen der Strömungseigenschaften eines Propellers
US11584492B1 (en) 2022-05-11 2023-02-21 John De Maria Directed thrust propulsion system
CN116573128B (zh) * 2023-07-14 2023-09-19 山东省水利科学研究院 一种船舶用具有防异物缠绕的螺旋桨推进机构

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Publication number Priority date Publication date Assignee Title
US442615A (en) 1890-12-16 Marine propulsion
DE58558C (de) * H.DOCK in Philadelphia, V. St. A Neuerung an ummantelten Schrauben
US2139594A (en) * 1936-02-08 1938-12-06 Kort Ludwig Combined propelling and steering device for screw propelled ships
GB502564A (en) * 1937-07-20 1939-03-20 Ludwig Kort Improvements in combined propelling and steering device for screw-propelled ships
GB1215136A (en) * 1967-02-20 1970-12-09 Kort Propulsion Co Ltd Improvements in nozzles or shrouds for ships' propellers
FR2096099A5 (ja) * 1970-06-11 1972-02-11 Strommen Staal Strommen
NO127962B (ja) * 1970-06-11 1973-09-10 Strommen Staal As
JPS4944495A (ja) * 1972-07-19 1974-04-26
US3899992A (en) * 1972-07-20 1975-08-19 Ronald George Fuller Marine steering device
JPS50103097A (ja) * 1974-01-24 1975-08-14
JPS50154992A (ja) * 1974-06-04 1975-12-13
GB1507677A (en) * 1974-10-18 1978-04-19 Nat Res Dev Ducted propellers
JPS51100593A (ja) * 1975-03-03 1976-09-04 Kawasaki Heavy Ind Ltd Senpakuyokakeishanozuru
JPS532899U (ja) * 1976-06-25 1978-01-12
JPS554935U (ja) * 1978-06-24 1980-01-12
JPS5836999U (ja) * 1981-09-04 1983-03-10 川崎重工業株式会社 分離型ダクト・プロペラ
NL8420304A (nl) * 1983-12-09 1985-11-01 Church Leslie Graham Ringschroef.
US4637801A (en) * 1984-07-12 1987-01-20 William H. Flood Thrust enhancing propeller duct assembly for water craft
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US6159062A (en) * 1997-04-24 2000-12-12 Taylor, Jr.; Guy High performance boat prop guard
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Also Published As

Publication number Publication date
JP2009120169A (ja) 2009-06-04
TWI356791B (en) 2012-01-21
DE202007016163U1 (de) 2008-01-24
ATE555979T1 (de) 2012-05-15
HK1129640A1 (en) 2009-12-04
US20100323566A1 (en) 2010-12-23
CN101434292A (zh) 2009-05-20
US20090130927A1 (en) 2009-05-21
KR20090050915A (ko) 2009-05-20
EP2060482A1 (de) 2009-05-20
HRP20120601T1 (hr) 2012-08-31
ES2386467T3 (es) 2012-08-21
PL2060482T3 (pl) 2012-10-31
KR101216919B1 (ko) 2012-12-28
TW200922837A (en) 2009-06-01
SG152959A1 (en) 2009-06-29
US8246401B2 (en) 2012-08-21
CN101434292B (zh) 2012-06-13
JP5184907B2 (ja) 2013-04-17

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