EP0425723B1 - Propulsion d'hélice immergée - Google Patents

Propulsion d'hélice immergée Download PDF

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Publication number
EP0425723B1
EP0425723B1 EP89120235A EP89120235A EP0425723B1 EP 0425723 B1 EP0425723 B1 EP 0425723B1 EP 89120235 A EP89120235 A EP 89120235A EP 89120235 A EP89120235 A EP 89120235A EP 0425723 B1 EP0425723 B1 EP 0425723B1
Authority
EP
European Patent Office
Prior art keywords
gap
propeller drive
drive according
stator
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.)
Expired - Lifetime
Application number
EP89120235A
Other languages
German (de)
English (en)
Other versions
EP0425723A1 (fr
Inventor
Norbert Dr.-Ing. Dipl.-Ing. Hoogen
Klaus Dr. Dipl.-Phys. Blickle
Klaus Dipl.-Ing. Delius
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.)
Blohm and Voss International GmbH
Original Assignee
Blohm and Voss International GmbH
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 Blohm and Voss International GmbH filed Critical Blohm and Voss International GmbH
Priority to ES89120235T priority Critical patent/ES2050758T3/es
Priority to DE58907472T priority patent/DE58907472D1/de
Priority to AT89120235T priority patent/ATE104227T1/de
Priority to EP89120235A priority patent/EP0425723B1/fr
Publication of EP0425723A1 publication Critical patent/EP0425723A1/fr
Application granted granted Critical
Publication of EP0425723B1 publication Critical patent/EP0425723B1/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
    • 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
    • B63H1/16—Propellers having a shrouding ring attached to blades
    • 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
    • B63H23/00—Transmitting power from propulsion power plant to propulsive elements
    • B63H2023/005—Transmitting power from propulsion power plant to propulsive elements using a drive acting on the periphery of a rotating propulsive element, e.g. on a dented circumferential ring on a propeller, or a propeller acting as rotor of an electric motor

Definitions

  • the invention relates to an underwater propeller drive as a ship propulsion device with a screw propeller arranged in a nozzle, the wing ends of which are connected to one another via a peripheral ring bandage with integrated permanent magnets (rotor) and whose stator is arranged in the stationary part of the nozzle, the gap between the stator and rotor being flooded and an axial flow is set.
  • the underwater propeller drive can be driven electrically, the stator windings being arranged in a nozzle.
  • the power can be controlled either by regulating the speed of a power generation unit or by an externally operated, static converter in semiconductor technology (for example using GTO thyristors), the speed of the synchronous motor being determined by the frequency of the supply voltage.
  • the ring-shaped stator is opposite an also ring-shaped bandage, which connects the wing ends of the screw propeller to one another and has permanent magnets with a high power density. Between the stator and the rotor, ie the ring bandage, there is a flooded ring gap, the geometric one The design is decisive for the power losses that occur during rotor movements.
  • the gap should be as narrow as possible, the lower limit being predetermined by manufacturing tolerances.
  • narrow gaps have the disadvantage that the hydrodynamic resistance increases.
  • impurities in the water due to sedimentation, centrifugal forces and adherence accumulate in the bottom of the flat, U-shaped gap and cause both high hydrodynamic friction losses and lead to abrasive wear in contact with components.
  • the axial flow set in the gap prevents effective deposits and maintains the selected gap geometry.
  • sedimentation is prevented by at least one axial suction line leading to the nozzle end, this effect being reinforced by the fact that the suction line is enlarged in cross-section towards the nozzle end, preferably is flared.
  • the maintenance of an axial flow is favored in that the U-shaped gap has rounded edges on both sides of the stator / rotor.
  • suction line The effect that can be achieved by means of the suction line is further enhanced by the fact that at least one axial pressure flushing line coming from the nozzle inflow side opens into the gap.
  • the suction line or the pressure-flushing line is in each case narrowed towards the gap (diffuser-like), as a result of which the flow velocity in the gap is significantly increased.
  • the outlet openings of the flushing lines and the inlet openings of the suction lines are therefore arranged opposite each other, which supports the axial flushing flow.
  • the rinsing lines and the suction lines are round or oval in cross section.
  • the rinsing lines and / or the suction lines are arranged at substantially uniform intervals only in the lower region of the annular gap or over the entire circumference.
  • the pressure-flushing line is preferably either additionally or exclusively flushed with purified water.
  • a contactless seal is understood to mean a sealing lip which is screwed or welded to the stator side. If a non-contact gap seal is used only on the suction side of the propeller, this causes a greatly reduced axial flow through the base of the U-shaped gap, since the seals represent a conscious flow resistance for the liquid flowing from the legs into the gap base.
  • a non-contact gap seal is arranged in the leg of the U-shaped gap only on the pressure side, the entry of impurities is also minimized, the U-shaped gap being flowed through axially vigorously. If the aforementioned measures are combined and contactless seals are used on both legs of the U-shaped gap, the entry of contaminants into the gap base is greatly reduced, but at the same time the axial flow through the gap is minimized.
  • a labyrinth-like sealing system consisting of a plurality of sealing lips instead of a sealing lip, the respective sealing lips of the labyrinth preferably being aligned axially and having a “toothed” arrangement.
  • the seals are arranged mirror-symmetrically to the propeller plane as far down as possible in the leg area of the U-shaped gap.
  • Gap widths between 3 mm and 10 mm have proven to be optimal.
  • the gap boundary surfaces are essentially smooth and free of pores.
  • a uniform gap geometry is ensured if the bandage and / or the stator consists of largely pressure-resistant material, which, however, should be elastic.
  • the respective gaps between the stator and the rotor can be connected to one another via axial lines.
  • the above measures are based, on the one hand, on flushing the gap actively (via pressure flushing lines) or passively (via suction lines) and, on the other hand, on the fact that from the outset - in special cases even without active or passive flushing - the access of contaminants through the arrangement of seals is prevented in the gap area.
  • the flow in the gap is due to the small gap widths and the relative speeds in a range of e.g. 20 to 35 m / sec very turbulent, so that a tangential flow field forms in the gap.
  • the stamping of a strong axial component therefore requires the measure of the inventive concept.
  • the underwater propeller drive 10 which is known in principle from the prior art in FIG. 1, has a cylindrical housing as a nozzle 11, which is open at the end faces. Arm crosses 12 and 13 are arranged in the nozzle 11 and receive the respective bearings 14 and 15 for a shaft 16 of a screw propeller 17.
  • the wing ends of the screw propeller are connected to one another via an annular bandage 18, in or on the outer jacket of which permanent magnets 20 are arranged in a high seal distributed over the circumference thereof.
  • the rotor 19 thus created is opposed by a stator 22 firmly connected to the nozzle 11, forming a gap 21 with the width b.
  • the stator or stator windings and the voltage supply for the stator are not shown, they are known in principle from the prior art.
  • the gap 21 lying between the rotor 19 and the stator 22 merges into vertical gap legs 21a, 21b on both sides of the rotor and the stator, so that its cross section is essentially U-shaped. To avoid sedimentation in the corners, they are rounded.
  • the gap 21 is connected on both sides with lines, specifically with a suction line 23 leading to the nozzle outlet, which is designed as a diffuser and widens conically towards the nozzle outlet. This creates an optimal flow profile, which prevents contaminants from being deposited in the gap.
  • a pressure-flushing line 24 is provided on the suction side 25 of the propeller, which also opens into the gap area 21c. This pressure-flushing line 24 is also designed like a diffuser, but it narrows conically in the direction of the gap 21.
  • Permanent magnets 20a are arranged as a rotor in the ring bandage 18 or on the outer casing thereof, while the stator 20b is provided in a fixed manner on the nozzle casing 11.
  • each screw propeller 17a, 17b has an annular bandage 18, with which the wing ends of the screw propeller are connected.
  • Each ring bandage 18 carries permanent magnets 20a distributed around its circumference as a rotor, whereas the nozzle jacket is provided with the stator 20b.
  • the gap widths of the radial legs can deviate from the gap width of the axial gap back.
  • 23,24,24a are the suction and rinsing lines.
  • suction lines and pressure-flushing lines are arranged in the lower region of the underwater propeller drive 10, as shown in FIG. 3, preferably at an equidistant distance.
  • pressure-flushing lines 24 and suction lines 23 are also possible to arrange pressure-flushing lines 24 and suction lines 23 at a uniform distance from one another over the entire circumference, the outlet openings of which should lie opposite the respective inlet openings of the suction lines. Since the suction lines or the like with additional pumps. connected, they are to be understood as a passive measure.
  • the contactless seal 27 consists of a sealing lip which is attached to a split leg wall and projects freely into the split leg.
  • a so-called labyrinth seal 28 is used, which consists of a plurality of such sealing lips, the sealing lips engaging in respective spaces between opposing sealing lips, that is to say arranged in an “interlocking manner”.
  • the hydrostatic resistance created by a sealing lip or a labyrinth seal may be set in connection with the pressure flushing lines and the suction line so that the desired flow profile is set in the gap 21, in particular in the gap base region 21c.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
  • Hydraulic Turbines (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)
  • Manufacture Of Motors, Generators (AREA)

Claims (15)

  1. Propulsion à hélice immergée (10) comme dispositif de propulsion de navire avec un propulseur à hélice (17), placé dans une tuyère (11), dont les extrémités de pale sont reliées l'une à l'autre par un bandage annulaire périphérique (18) avec des aimants permanents intégrés (20) (rotor 19) et dont le stator (22) est placé dans la partie fixe de la tuyère (11), la fente (21) entre le stator (22) et le rotor (19) étant noyée et un courant axial étant ajusté, caractérisée en ce que la fente (21) essentiellement en forme de U avec des arêtes rondies des deux côtés du stator (22)/rotor (19) est reliée à au moins une conduite d'aspiration axiale (23), qui mène à l'extrémité de la tuyère, dont la section s'agrandit vers l'extrémité de la tuyère, qui s'élargit de préférence de manière conique et qui est configurée à la manière d'un diffuseur, au moins une conduite axiale de balayage sous pression (24) qui vient du côté afflux de la tuyère (25) aboutissant dans la fente (21), conduite qui est balayée en plus ou exclusivement avec de l'eau purifiée.
  2. Propulsion à hélice immergée selon la revendication 1, caractérisée en ce que la conduite de balayage sous pression (24) est configurée à la manière d'un diffuseur.
  3. Propulsion à hélice immergée selon l'une des revendications 1 et 2, caractérisée en ce que l'ouverture (les ouvertures) de la (des) conduite(s) de balayage (24) et l'ouverture (les ouvertures) d'entrée de la (des) conduite(s) d'aspiration (23) sont placées respectivement en face l'une de l'autre.
  4. Propulsion à hélice immergée selon l'une des revendications 1 à 3, caractérisée en ce que la (les) conduite (s) de balayage (24) et/ou la (les) conduite(s) d'aspiration (23) possèdent une section ronde ou ovale.
  5. Propulsion à hélice immergée selon l'une des revendications 1 à 4, caractérisée en ce que les conduites de balayage (24) et/ou les conduites d'aspiration (23) ne sont placées que dans la zone inférieure (21c) de la fente annulaire (21) ou sur toute la périphérie à des écarts substantiellement égaux.
  6. Propulsion à hélice immergée selon l'une des revendications 1 à 5, caractérisée en ce que des étanchéités sans contact (27, 28) sont placées sur le montant de la fente (21a, 21b) côté aspiration (25) et/ou côté refoulement (26) de l'hélice (17).
  7. Propulsion à hélice immergée selon la revendication 6, caractérisée en ce que l'étanchéité du montant de la fente (27, 28) est constituée par au moins une lèvre d'étanchéité (27) vissée ou soudée au côté du stator.
  8. Propulsion à hélice immergée selon la revendication 6 ou 7, caractérisée en ce que l'étanchéité sans contact est constituée par une étanchéité en plusieurs parties avec une structure du type labyrinthe (28).
  9. Propulsion à hélice immergée selon la revendication 8, caractérisée en ce que les lèvres d'étanchéité respectives (27, 28) du labyrinthe sont alignées axialement.
  10. Propulsion à hélice immergée selon l'une des revendications 7 à 9, caractérisée en ce que les étanchéités (27, 28) sont placées de manière symétrique par rapport au plan de l'hélice.
  11. Propulsion à hélice immergée selon l'une des revendications 1 à 10, caractérisée en ce que la largeur de la fente (b) se situe entre 3 mm et 10 mm.
  12. Propulsion à hélice immergée selon l'une des revendications 1 à 11, caractérisée en ce que les largeurs de la fente du montant radial diffèrent de la largeur de la fente du dos axial de la fente.
  13. Propulsion à hélice immergée selon l'une des revendications 1 à 12, caractérisée en ce que les surfaces de délimitation de la fente sont substantiellement lisses et sans pores.
  14. Propulsion à hélice immergée selon l'une des revendications 1 à 13, caractérisée en ce que le bandage (18) et/ou le stator (22) est (sont) constitué(s) par une matière élastique qui résiste dans une large mesure à la pression.
  15. Propulsion à hélice immergée selon l'une des revendications 1 à 14, caractérisée en ce que plusieurs hélices (17) sont placées l'une derrière l'autre dans une tuyère (11), les fentes respectives (21) entre le stator (22) et le rotor (19) étant reliées l'une à l'autre par des conduites axiales.
EP89120235A 1989-11-01 1989-11-01 Propulsion d'hélice immergée Expired - Lifetime EP0425723B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
ES89120235T ES2050758T3 (es) 1989-11-01 1989-11-01 Accionamiento de propulsion de helice bajo el agua.
DE58907472T DE58907472D1 (de) 1989-11-01 1989-11-01 Unterwasserpropellerantrieb.
AT89120235T ATE104227T1 (de) 1989-11-01 1989-11-01 Unterwasserpropellerantrieb.
EP89120235A EP0425723B1 (fr) 1989-11-01 1989-11-01 Propulsion d'hélice immergée

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP89120235A EP0425723B1 (fr) 1989-11-01 1989-11-01 Propulsion d'hélice immergée

Publications (2)

Publication Number Publication Date
EP0425723A1 EP0425723A1 (fr) 1991-05-08
EP0425723B1 true EP0425723B1 (fr) 1994-04-13

Family

ID=8202083

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89120235A Expired - Lifetime EP0425723B1 (fr) 1989-11-01 1989-11-01 Propulsion d'hélice immergée

Country Status (4)

Country Link
EP (1) EP0425723B1 (fr)
AT (1) ATE104227T1 (fr)
DE (1) DE58907472D1 (fr)
ES (1) ES2050758T3 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5185545A (en) * 1990-08-23 1993-02-09 Westinghouse Electric Corp. Dual propeller shock resistant submersible propulsor unit
EP0686115A1 (fr) * 1993-03-02 1995-12-13 BRANDT, Lennart Dispositif de propulsion pour un bateau marin
US6109985A (en) * 1999-03-02 2000-08-29 The United States Of America As Represented By The Secretary Of The Navy Propeller deflection snubber
GB2359049A (en) 2000-02-10 2001-08-15 H2Eye Remote operated vehicle
NO322433B1 (no) * 2006-01-18 2006-10-02 Brunvoll As Tapsreduksjon for anordning til bruk som skipspropell eller generator
JP5100370B2 (ja) * 2007-12-28 2012-12-19 川崎重工業株式会社 推力発生装置
ES2460616T3 (es) 2008-05-27 2014-05-14 Siemens Aktiengesellschaft Submarino con un mecanismo de propulsión que presenta un motor eléctrico anular
CN108860540A (zh) * 2018-07-05 2018-11-23 上海查派机器人科技有限公司 水下推进器与水下机器人

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191119997A (en) * 1910-09-28 1912-02-22 Frantisek Simon Improvements in Screw Propellers.
DE690233C (de) * 1938-01-27 1940-04-19 Ludwig Kort Dipl Ing Elektrisch angetriebene Schiffsschraube
DE903181C (de) * 1951-10-10 1954-02-04 Ludwig Kort Dipl Ing Elektro-Duesenpropeller fuer Schiffsantriebe
US3499412A (en) * 1968-02-08 1970-03-10 Dravo Corp Kort nozzle
FR2096099A5 (fr) * 1970-06-11 1972-02-11 Strommen Staal Strommen
FR2336297A1 (fr) * 1975-12-22 1977-07-22 Acec Helice pour propulsion marine
GB2009070B (en) * 1977-11-30 1982-03-10 Hydroconic Ltd Marine propulsion systems

Also Published As

Publication number Publication date
DE58907472D1 (de) 1994-05-19
ES2050758T3 (es) 1994-06-01
ATE104227T1 (de) 1994-04-15
EP0425723A1 (fr) 1991-05-08

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