NO20120899A1 - Ring propeller with forward twist - Google Patents

Ring propeller with forward twist Download PDF

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Publication number
NO20120899A1
NO20120899A1 NO20120899A NO20120899A NO20120899A1 NO 20120899 A1 NO20120899 A1 NO 20120899A1 NO 20120899 A NO20120899 A NO 20120899A NO 20120899 A NO20120899 A NO 20120899A NO 20120899 A1 NO20120899 A1 NO 20120899A1
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Norway
Prior art keywords
propeller
ring
thruster
edge contour
blade
Prior art date
Application number
NO20120899A
Other languages
Norwegian (no)
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NO335877B1 (en
Inventor
Jahn Terje Johannessen
Original Assignee
Rolls Royce Marine As
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 Rolls Royce Marine As filed Critical Rolls Royce Marine As
Priority to NO20120899A priority Critical patent/NO335877B1/en
Priority to BR112015003246A priority patent/BR112015003246A2/en
Priority to PCT/EP2013/066925 priority patent/WO2014026993A1/en
Priority to JP2015526969A priority patent/JP6158331B2/en
Priority to PT137533014T priority patent/PT2885203T/en
Priority to US14/420,398 priority patent/US20150210370A1/en
Priority to ES13753301.4T priority patent/ES2621905T3/en
Priority to RU2015106853A priority patent/RU2628625C2/en
Priority to DK13753301.4T priority patent/DK2885203T3/en
Priority to PL13753301T priority patent/PL2885203T3/en
Priority to KR1020157006541A priority patent/KR102112493B1/en
Priority to EP13753301.4A priority patent/EP2885203B1/en
Publication of NO20120899A1 publication Critical patent/NO20120899A1/en
Publication of NO335877B1 publication Critical patent/NO335877B1/en
Priority to HK15110357.9A priority patent/HK1209708A1/en
Priority to HRP20170565TT priority patent/HRP20170565T1/en

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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
    • 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
    • B63H1/26—Blades
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H21/00—Use of propulsion power plant or units on vessels
    • B63H21/12—Use of propulsion power plant or units on vessels the vessels being motor-driven
    • B63H21/17—Use of propulsion power plant or units on vessels the vessels being motor-driven by electric motor
    • 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
    • B63H5/125—Arrangements on vessels of propulsion elements directly acting on water of propellers movably mounted with respect to hull, e.g. adjustable in direction, e.g. podded azimuthing thrusters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B2241/00—Design characteristics
    • B63B2241/02—Design characterised by particular shapes
    • B63B2241/10—Design characterised by particular shapes by particular three dimensional shapes
    • 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
    • B63H5/125—Arrangements on vessels of propulsion elements directly acting on water of propellers movably mounted with respect to hull, e.g. adjustable in direction, e.g. podded azimuthing thrusters
    • B63H2005/1254—Podded azimuthing thrusters, i.e. podded thruster units arranged inboard for rotation about vertical axis
    • B63H2005/1258—Podded azimuthing thrusters, i.e. podded thruster units arranged inboard for rotation about vertical axis with electric power transmission to propellers, i.e. with integrated electric propeller motors

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  • 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)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)

Abstract

Det er beskrevet en ringpropell (12) for en thruster (10). Ringpropellen (12) omfatter en ring (15), et senterelement (16) og minst ett propellblad (18) som strekker seg mellom og er festet til henholdsvis senterelementet (16) og ringen (15). Det minst ene propellbladet (18) er anordnet med forovervridning og forkantkonturen (19) til det minst ene propellbladet (18) har en S-form i et tverrsnitt normalt på ringpropellens (12) rotasjonsakse A.A thruster (12) for a thruster (10) is disclosed. The ring propeller (12) comprises a ring (15), a center element (16) and at least one propeller blade (18) extending between and fixed to the center element (16) and the ring (15), respectively. The at least one propeller blade (18) is provided with forward rotation and the leading edge contour (19) of the at least one propeller blade (18) has an S-shape in a cross section normal to the axis of rotation of the ring propeller (12).

Description

Den foreliggende søknaden vedrører en ringpropell og en thruster omfattende en ringpropell som er drevet av en permanentmagnetmotor. The present application relates to a ring propeller and a thruster comprising a ring propeller which is driven by a permanent magnet motor.

Denne typen thrustere med en ringpropell som drives ved hjelp av en permanentmagnetmotor anvendes på forskjellige typer fartøyer. Kjente permanentmagnetdrevne ringpropeller har imidlertid vært designet uten særlig vridning (eng.: skew). This type of thruster with a ring propeller driven by a permanent magnet motor is used on various types of vessels. However, known permanent magnet-driven ring propellers have been designed without particular skew.

Ved utviklingen av den foreliggende ringpropellen og thrusteren som drives med en permanentmagnetmotor, har det vært en hensikt å tilveiebringe en permanentmagnetdrevet thruster med en høyere virkningsgrad enn kjente thrustere. In the development of the present ring propeller and the thruster which is driven with a permanent magnet motor, it has been an aim to provide a permanent magnet driven thruster with a higher degree of efficiency than known thrusters.

Videre har det vært en hensikt å tilveiebringe en permanentmagnetdrevet thruster med en ringpropell hvor man har bedre kontroll på når kavitasjon setter inn og omfanget av kavitasjonen. Furthermore, it has been an aim to provide a permanent magnet driven thruster with a ring propeller where one has better control over when cavitation sets in and the extent of the cavitation.

Disse hensiktene oppnås med den foreliggende ringpropellen som definert i krav 1, en thruster som definert i krav 6 og en anvendelse av ringpropellen som definert i krav 7. Ytterligere utførelsesformer av ringpropellen er definert i kravene 2-5. These purposes are achieved with the present ring propeller as defined in claim 1, a thruster as defined in claim 6 and an application of the ring propeller as defined in claim 7. Further embodiments of the ring propeller are defined in claims 2-5.

Det er tilveiebrakt en ringpropell for en thruster. Ringpropellen omfatter en ring, et senterelement og minst ett propellblad som strekker seg mellom senterelementet og ringen og er festet til senterelementet og ringen. Propellbladet har en forkantkontur og en akterkantkontur og er anordnet med forovervridning. Forkantkonturen til det minst ene propellbladet har videre en S-form i et tverrsnitt normalt på ringpropellens rotasjonsakse. Det minst ene propellbladets akterkantkontur kan også ha en S-form i et tverrsnitt normalt på ringpropellens rotasjonsakse. Kombinasjonen av S-formen på det minst ene propellbladets forkantkontur og/eller akterkantkontur og forovervridningen av det minst ene propellbladet gir bedre kavitasjonsforhold, dvs. redusert kavitasjon. A ring propeller is provided for a thruster. The ring propeller comprises a ring, a center element and at least one propeller blade which extends between the center element and the ring and is attached to the center element and the ring. The propeller blade has a leading edge contour and a trailing edge contour and is arranged with forward twist. The leading edge contour of at least one propeller blade also has an S-shape in a cross-section normal to the ring propeller's axis of rotation. The trailing edge contour of the at least one propeller blade can also have an S-shape in a cross-section normal to the ring propeller's axis of rotation. The combination of the S-shape of the at least one propeller blade's leading edge contour and/or trailing edge contour and the forward twisting of the at least one propeller blade results in better cavitation conditions, i.e. reduced cavitation.

Forkanten har en forkantkontur sett i et snitt normalt på ringpropellens rotasjonsakse. Tilsvarende er propellbladenes akterkant da naturlig nok kanten på motsatt side av propellbladet og har en akterkantkontur sett i et snitt normalt på ringpropellens rotasjonsakse. At ringpropellens blader har en forovervridning (eng.: forward skew) betyr at propelltippen, som er festet til ringen, vris frem mot propellens normale rotasjonsretning slik at den ytterste delen av bladet tidligere møter soner med endret hastighet. I forbindelse med forovervridningen av propellbladene kan det defineres en vridningsvinkel (eng.: skew). Vridningsvinkelen er den størst mulige vinkelen, sett i et tverrsnitt normalt på ringpropellens rotasjonsakse, målt mellom den rette linjen som trekkes fra punktet der propellbladets midtkordelinje/skewlinje møter ringpropellens omsluttende ring og rotasjonsaksen og en linje som tangerer et punkt på propellbladets midtkordelinje og rotasjonsaksen. Propellbladets midtkordelinje og vridningsvinkelen til et propellblad på den foreliggende ringpropellen er vist på de vedlagte figurene. The leading edge has a leading edge contour seen in a section normal to the ring propeller's axis of rotation. Correspondingly, the trailing edge of the propeller blades is then naturally the edge on the opposite side of the propeller blade and has a trailing edge contour seen in a section normal to the ring propeller's axis of rotation. The fact that the ring propeller's blades have a forward skew means that the propeller tip, which is attached to the ring, twists forward against the propeller's normal direction of rotation so that the outermost part of the blade earlier encounters zones with a changed speed. In connection with the forward twisting of the propeller blades, a twist angle (eng.: skew) can be defined. The twist angle is the largest possible angle, seen in a cross-section normal to the ring propeller's rotation axis, measured between the straight line drawn from the point where the propeller blade's midchord line/skew line meets the ring propeller's enclosing ring and the axis of rotation and a line that is tangent to a point on the propeller blade's midchord line and the axis of rotation. The centerline of the propeller blade and the angle of twist of a propeller blade on the present ring propeller are shown in the attached figures.

Den S-formede forkantkonturen kan, i et parti ved innfestingspunktet til ringen, ha en konkav utforming. I praksis vil det si at tangenten til forkantkonturen ved innfestingspunktet til ringpropellens omsluttende ring og tangenten til den omsluttende ringen i det samme innfestingspunktet danner en vinkel som er større en 0° og mindre enn 90°. The S-shaped leading edge contour can, in part at the attachment point of the ring, have a concave design. In practice, this means that the tangent to the leading edge contour at the attachment point of the ring propeller's enclosing ring and the tangent to the enclosing ring at the same attachment point form an angle that is greater than 0° and less than 90°.

I en utførelsesform av oppfinnelsen kan også den S-formede akterkantkonturen, i et parti ved innfestingspunktet til ringen, ha en konkav utforming. På tilsvarende måte som over vil det si at tangenten til akterkantkonturen ved innfestingspunktet til ringpropellens omsluttende ring og tangenten til den omsluttende ringen i det samme innfestingspunktet danner en vinkel som er større en 0° og mindre enn 90°. In one embodiment of the invention, the S-shaped stern edge contour, in a part at the attachment point of the ring, can also have a concave design. In a similar way to above, this means that the tangent to the stern contour at the attachment point of the ring propeller's enclosing ring and the tangent to the enclosing ring at the same attachment point form an angle that is greater than 0° and less than 90°.

Av hensyn til bladenes styrke er de fortrinnsvis gitt en fortykket form (fillet) i overgangen til propellringen. Ved å benytte en konkav utforming ytterst på bladene, gis det rom for en slankere fillet og derved bedre hydrodynamiske forhold på den ytterste delen av propellen. In consideration of the strength of the blades, they are preferably given a thickened shape (fillet) in the transition to the propeller ring. By using a concave design on the outermost part of the blades, there is room for a slimmer fillet and thereby better hydrodynamic conditions on the outermost part of the propeller.

I en utførelsesform av den foreliggende oppfinnelsen er ringpropellens ring fortrinnsvis anordnet med permanentmagneter, hvor permanentmagnetene utgjør en del av en permanentmagnetmotor når ringpropellen er montert i thrusteren. In an embodiment of the present invention, the ring of the ring propeller is preferably arranged with permanent magnets, where the permanent magnets form part of a permanent magnet motor when the ring propeller is mounted in the thruster.

Det er også tilveiebrakt en thruster omfattende en ringpropell og en permanentmagnetmotor. Thrusteren omfatter en ringpropell som beskrevet ovenfor og et thrusterhus som omslutter ringpropellens ring og som omfatter permanentmagnetmotorens statorviklinger. Det dannes derved en permanentmagnetmotor som driver ringpropellen. Thrusterens ringpropell er ellers fortrinnsvis utformet som beskrevet ovenfor og kan med fordel anvendes på et fartøy. Also provided is a thruster comprising a ring propeller and a permanent magnet motor. The thruster comprises a ring propeller as described above and a thruster housing which encloses the ring of the ring propeller and which comprises the stator windings of the permanent magnet motor. A permanent magnet motor is thereby formed which drives the ring propeller. The thruster's ring propeller is otherwise preferably designed as described above and can advantageously be used on a vessel.

I det etterfølgende skal det beskrives en ikke-begrensende utførelsesform av den foreliggende oppfinnelsen med henvisning til figurene, hvor In what follows, a non-limiting embodiment of the present invention will be described with reference to the figures, where

Figur 1 viser et tverrsnitt av en thruster med en ringpropell i henhold til foreliggende oppfinnelse normalt på ringpropellens rotasjonsakse A. Figur 2 viser samme figur som over, men hvor vinkelene mellom ringen og henholdsvis forkantkontur og akterkantkontur er antydet. Figur 1 viser en thruster 10 i henhold til den foreliggende oppfinnelsen. Thrusteren 10 omfatter et thrusterhus 13 og en ringpropell 12 som kan være roterbart opp lagret i thrusterhuset 13 om rotasjonsaksen A. Ringpropellen 12 omfatter en ring 15 og et senterelement 16. Mellom ringen 15 og senterelementet 16 er det fortrinnsvis anordnet et antall propellblad 18 som er festet til senterelementet 16 og ringen 15. Ringpropellen 12 er dermed en monoblokk hvor propellbladene 18 har fast stigning. Thrusteren 10 er innrettet for å festes til et fartøy (ikke vist på figurene). Til dette formålet kan thrusteren 10 være anordnet med et innfestingselement 17 slik at thrusteren 10 eksempelvis kan skrus, boltes eller sveises fast til fartøyet. Figure 1 shows a cross-section of a thruster with a ring propeller according to the present invention normally on the ring propeller's axis of rotation A. Figure 2 shows the same figure as above, but where the angles between the ring and respectively the leading edge contour and trailing edge contour are indicated. Figure 1 shows a thruster 10 according to the present invention. The thruster 10 comprises a thruster housing 13 and a ring propeller 12 which can be rotatably stored in the thruster housing 13 about the axis of rotation A. The ring propeller 12 comprises a ring 15 and a center element 16. Between the ring 15 and the center element 16 there is preferably arranged a number of propeller blades 18 which are attached to the center element 16 and the ring 15. The ring propeller 12 is thus a monobloc where the propeller blades 18 have a fixed pitch. The thruster 10 is designed to be attached to a vessel (not shown in the figures). For this purpose, the thruster 10 can be provided with an attachment element 17 so that the thruster 10 can, for example, be screwed, bolted or welded to the vessel.

Ringpropellen 12 omfatter videre permanentmagneter (ikke vist på figurene) som fortrinnsvis er anordnet i ringen 15. I thrusterhuset 13 er det tilsvarende anordnet statorviklinger (ikke vist på figurene) slik at ringpropellen således drives av en permanentmagnetmotor. Elektrisk strøm for permanentmagnetmotoren kan eksempelvis tilføres gjennom innfestingselementet 17. The ring propeller 12 further comprises permanent magnets (not shown in the figures) which are preferably arranged in the ring 15. In the thruster housing 13 there are similarly arranged stator windings (not shown in the figures) so that the ring propeller is thus driven by a permanent magnet motor. Electric current for the permanent magnet motor can, for example, be supplied through the fastening element 17.

Propellbladene 18 har en forkantkontur 19 og en akterkantkontur 20 i et snitt normalt på ringpropellens 12 rotasjonsakse A som antydet på figur 1. Forkantkonturen 19 og akterkantkonturen 20 er definert i forhold til ringpropellens 12 rotasjonsretning R som vist på figur 1. The propeller blades 18 have a leading edge contour 19 and a trailing edge contour 20 in a section normal to the ring propeller 12's rotation axis A as indicated in Figure 1. The leading edge contour 19 and the trailing edge contour 20 are defined in relation to the ring propeller 12's direction of rotation R as shown in Figure 1.

Propellbladene 18 har en tenkt midtkordelinje 24 som strekker seg fra senterelementet 16 til et punkt 27 hvor midtlinjen skjærer ringen 15. Midtkordelinjen 24 er den tenkte linjen som ligger like langt fra forkantkonturen 19 som fra akterkantkonturen 20 på propellbladet 18. The propeller blades 18 have an imaginary center chord line 24 that extends from the center element 16 to a point 27 where the center line intersects the ring 15. The center chord line 24 is the imaginary line that is the same distance from the leading edge contour 19 as from the trailing edge contour 20 of the propeller blade 18.

Propellen er som antydet på figurene, utformet med forovervridning (forover skew), dvs. at propellbladene 18 er vridd forover i retning av propellens normale rotasjonsretning R slik at den ytterste delen av bladet tidligere møter soner med endret hastighet. Graden av forovervridning kan angis ved hjelp av vridningsvinkelen V. Vridningsvinkelen V er den største vinkelen som dannes mellom en første linje 25 gjennom rotasjonsaksen A og et punkt 27 hvor midtlinjen 24 krysser ringens 15 indre diameter og en andre linje 26 gjennom rotasjonsaksen A og et punkt 28 på midtlinjen 24. Avhengig av propellbladets grad av forovervridning kan punktet 28 på midtlinjen variere. På figur 1 er punktet 28 på midtlinjen 24 som vil gi den største vinkelen, dvs. vridningsvinkelen V, helt inne ved senterelementet 16. Ved andre design kan punktet 28 befinne seg et sted på midtlinjen mellom senterelementet 16 og ringen 15. Ved å anordne ringpropellen 12 med forovervridning på denne måten, vil ringpropellen 12 få bedre kavitasjonsegenskaper fordi tippen på propellbladene 18 tar en mindre del av den totale skyvkraften. As indicated in the figures, the propeller is designed with forward skew (forward skew), i.e. that the propeller blades 18 are twisted forward in the direction of the propeller's normal direction of rotation R so that the outermost part of the blade earlier encounters zones with a changed speed. The degree of forward twist can be indicated using the twist angle V. The twist angle V is the largest angle formed between a first line 25 through the axis of rotation A and a point 27 where the center line 24 crosses the inner diameter of the ring 15 and a second line 26 through the axis of rotation A and a point 28 on the center line 24. Depending on the propeller blade's degree of forward twist, the point 28 on the center line may vary. In Figure 1, the point 28 on the center line 24 which will give the largest angle, i.e. the twist angle V, is completely inside the center element 16. In other designs, the point 28 can be located somewhere on the center line between the center element 16 and the ring 15. By arranging the ring propeller 12 with forward rotation in this way, the ring propeller 12 will have better cavitation properties because the tip of the propeller blades 18 takes a smaller part of the total thrust.

Som vist på figurene er propellbladenes 18 forkantkontur 19 utformet med en svak S-form. Dette gjør at propellbladene 18 i overgangen mot ringen 15 vil kunne utformes med slanke snitt som gir en god hydrodynamisk virkning og samtidig en tilstrekkelig styrke. Akterkantkonturene kan også utformes med en svak S-form som antydet på figurene. 1 overgangen mellom propellbladenes forkantkontur 19 og ringen 15, har propellbladene 18 fortrinnsvis en konkav utforming. Dette er vist nærmere på figur 2 hvor tangenten 30 til propellbladets forkantkontur 19 i innfestingspunktet 37 og tangenten 31 til ringen 15 i innfestingspunkt 37 til ringen er angitt. På grunn av at propellbladene 18 har en konkav utforming, er vinkelen 35 som åpner seg mot ringen, mindre enn 90° og større enn 0°. As shown in the figures, the leading edge contour 19 of the propeller blades 18 is designed with a slight S-shape. This means that the propeller blades 18 in the transition towards the ring 15 will be able to be designed with slim sections which provide a good hydrodynamic effect and at the same time sufficient strength. The stern contours can also be designed with a slight S-shape as indicated in the figures. 1 the transition between the leading edge contour 19 of the propeller blades and the ring 15, the propeller blades 18 preferably have a concave design. This is shown in more detail in Figure 2, where the tangent 30 to the propeller blade's leading edge contour 19 at the attachment point 37 and the tangent 31 to the ring 15 at the attachment point 37 to the ring are indicated. Due to the fact that the propeller blades 18 have a concave design, the angle 35 which opens towards the ring is less than 90° and greater than 0°.

På tilsvarende måte har propellbladene 18, i overgangen mellom propellbladenes akterkant 19 og ringen 15, fortrinnsvis en konkav utforming. Dette er også vist på figur 2 hvor tangenten 32 til propellbladets akterkantkontur 20 i innfestingspunktet 38 og tangenten 33 til ringens 15 innfestingspunkt 38 til ringen er angitt. På grunn av at propellbladene 18 har en konkav utforming, er også vinkelen 36 som åpner seg mot ringen, mindre enn 90° og større enn 0°. In a similar way, the propeller blades 18, in the transition between the propeller blades' trailing edge 19 and the ring 15, preferably have a concave design. This is also shown in Figure 2, where the tangent 32 to the propeller blade's trailing edge contour 20 at the attachment point 38 and the tangent 33 to the ring 15 attachment point 38 to the ring are indicated. Due to the fact that the propeller blades 18 have a concave design, the angle 36 which opens towards the ring is also less than 90° and greater than 0°.

Claims (7)

1. Ringpropell (12) for en thruster (10), hvilken ringpropell (12) omfatter en ring (15), et senterelement (16) og minst ett propellblad (18) som strekker seg mellom og er festet til henholdsvis senterelementet (16) og ringen (18), hvilket minst ene propellblad (18) har en forkantkontur (19) og en akterkantkontur (20) i et tverrsnitt normalt på ringpropellens (12) rotasjonsaksen A,karakterisert vedat det minst ene propellbladet (18) er anordnet med forovervridning og at forkantkonturen (19) til det minst ene propellbladet (18) har en S-form.1. Ring propeller (12) for a thruster (10), which ring propeller (12) comprises a ring (15), a center element (16) and at least one propeller blade (18) which extends between and is respectively attached to the center element (16) and the ring (18), which at least one propeller blade (18) has a leading edge contour (19) and a trailing edge contour (20) in a cross-section normal to the ring propeller's (12) rotation axis A, characterized in that the at least one propeller blade (18) is arranged with forward twist and that the leading edge contour (19) of the at least one propeller blade (18) has an S-shape. 2. Ringpropell i henhold til krav 1, karakterisert vedat det minst ene propellbladets (18) akterkantkontur (20) har en S-form i et tverrsnitt normalt på ringpropellens (12) rotasjonsakse A.2. Ring propeller according to claim 1, characterized in that the trailing edge contour (20) of at least one propeller blade (18) has an S-shape in a cross-section normal to the rotation axis A of the ring propeller (12). 3. Ringpropell i henhold til krav 1 eller 2, karakterisert vedat det minst ene propellbladets S-formede forkantkontur (19), i et parti av propellbladet (18) ved forkantens innfestingspunkt (37) til ringen (15), har en konkav utforming.3. Ring propeller according to claim 1 or 2, characterized in that the S-shaped leading edge contour (19) of at least one propeller blade, in a part of the propeller blade (18) at the leading edge's attachment point (37) to the ring (15), has a concave design. 4. Ringpropell i henhold til et av kravene 2-3, karakterisert vedat det minst ene propellbladets S-formede akterkantkontur (20), i et parti av propellbladet (18) ved akterkantens innfestingspunkt (38) til ringen (15), har en konkav utforming.4. Ring propeller according to one of claims 2-3, characterized in that the S-shaped trailing edge contour (20) of at least one propeller blade, in a part of the propeller blade (18) at the trailing edge attachment point (38) to the ring (15), has a concave design. 5. Ringpropell i henhold til et av kravene 1-4, karakterisert vedat ringpropellens ring (15) er anordnet med permanentmagneter, hvilke permanentmagneter utgjør en del av en permanentmagnetmotor når ringpropellen (12) er montert i thrusteren (10).5. Ring propeller according to one of claims 1-4, characterized in that the annular propeller's ring (15) is arranged with permanent magnets, which permanent magnets form part of a permanent magnet motor when the annular propeller (12) is mounted in the thruster (10). 6. Thruster (10) omfattende en ringpropell (12) og en permanentmagnetmotor,karakterisert vedat thrusteren (10) omfatter en ringpropell (12) i henhold til et av kravene 1-5 og et thrusterhus (13) som omslutter ringpropellens (12) ring (15) og som omfatter permanentmagnetmotorens statorviklinger.6. Thruster (10) comprising a ring propeller (12) and a permanent magnet motor, characterized in that the thruster (10) comprises a ring propeller (12) according to one of claims 1-5 and a thruster housing (13) which encloses the ring of the ring propeller (12) (15) and which includes the permanent magnet motor's stator windings. 7. Anvendelse av en ringpropell (12) i henhold til et av kravene 1-5 i en thruster (10) på et fartøy hvor ringpropellen (12) drives av en permanentmagnetmotor.7. Application of a ring propeller (12) according to one of claims 1-5 in a thruster (10) on a vessel where the ring propeller (12) is driven by a permanent magnet motor.
NO20120899A 2012-08-14 2012-08-14 Ring propeller with forward twist NO335877B1 (en)

Priority Applications (14)

Application Number Priority Date Filing Date Title
NO20120899A NO335877B1 (en) 2012-08-14 2012-08-14 Ring propeller with forward twist
RU2015106853A RU2628625C2 (en) 2012-08-14 2013-08-13 Ring propeller with blades rake forward
DK13753301.4T DK2885203T3 (en) 2012-08-14 2013-08-13 RING SCREW WITH PREVENTION
JP2015526969A JP6158331B2 (en) 2012-08-14 2013-08-13 Ring propeller with forward skew
PT137533014T PT2885203T (en) 2012-08-14 2013-08-13 Ring propeller with forward skew
US14/420,398 US20150210370A1 (en) 2012-08-14 2013-08-13 Ring propeller with forward screw
ES13753301.4T ES2621905T3 (en) 2012-08-14 2013-08-13 Ring propeller with forward tilt
BR112015003246A BR112015003246A2 (en) 2012-08-14 2013-08-13 ring propeller with front screw.
PCT/EP2013/066925 WO2014026993A1 (en) 2012-08-14 2013-08-13 Ring propeller with forward screw
PL13753301T PL2885203T3 (en) 2012-08-14 2013-08-13 Ring propeller with forward skew
KR1020157006541A KR102112493B1 (en) 2012-08-14 2013-08-13 Ring propeller with forward screw
EP13753301.4A EP2885203B1 (en) 2012-08-14 2013-08-13 Ring propeller with forward skew
HK15110357.9A HK1209708A1 (en) 2012-08-14 2015-10-22 Ring propeller with forward screw
HRP20170565TT HRP20170565T1 (en) 2012-08-14 2017-04-10 Ring propeller with forward screw

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NO20120899A NO335877B1 (en) 2012-08-14 2012-08-14 Ring propeller with forward twist

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NO20120899A1 true NO20120899A1 (en) 2014-02-17
NO335877B1 NO335877B1 (en) 2015-03-16

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US (1) US20150210370A1 (en)
EP (1) EP2885203B1 (en)
JP (1) JP6158331B2 (en)
KR (1) KR102112493B1 (en)
BR (1) BR112015003246A2 (en)
DK (1) DK2885203T3 (en)
ES (1) ES2621905T3 (en)
HK (1) HK1209708A1 (en)
HR (1) HRP20170565T1 (en)
NO (1) NO335877B1 (en)
PL (1) PL2885203T3 (en)
PT (1) PT2885203T (en)
RU (1) RU2628625C2 (en)
WO (1) WO2014026993A1 (en)

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Also Published As

Publication number Publication date
US20150210370A1 (en) 2015-07-30
EP2885203A1 (en) 2015-06-24
NO335877B1 (en) 2015-03-16
HK1209708A1 (en) 2016-04-08
BR112015003246A2 (en) 2017-07-04
EP2885203B1 (en) 2017-02-15
RU2628625C2 (en) 2017-08-21
JP2015524771A (en) 2015-08-27
WO2014026993A1 (en) 2014-02-20
PL2885203T3 (en) 2017-07-31
PT2885203T (en) 2017-04-24
RU2015106853A (en) 2016-10-10
DK2885203T3 (en) 2017-05-01
HRP20170565T1 (en) 2017-06-30
ES2621905T3 (en) 2017-07-05
KR20150043467A (en) 2015-04-22
KR102112493B1 (en) 2020-05-19
JP6158331B2 (en) 2017-07-05

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