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1. (WO2018104420) A METHOD OF AND A DEVICE FOR REDUCING THE AZIMUTHAL TORQUE ACTING ON A PULLING POD UNIT OR AZIMUTH THRUSTER
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Pub. No.: WO/2018/104420 International Application No.: PCT/EP2017/081773
Publication Date: 14.06.2018 International Filing Date: 07.12.2017
IPC:
B63H 5/125 (2006.01) ,B63B 1/32 (2006.01) ,B63H 1/28 (2006.01)
B PERFORMING OPERATIONS; TRANSPORTING
63
SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
H
MARINE PROPULSION OR STEERING
5
Arrangements on vessels of propulsion elements directly acting on water
07
of propellers
125
movably mounted with respect to hull, e.g. adjustable in direction
B PERFORMING OPERATIONS; TRANSPORTING
63
SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
B
SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
1
Hydrodynamic or hydrostatic features of hulls or of hydrofoils
32
Other means for varying the inherent hydrodynamic characteristics of hulls
B PERFORMING OPERATIONS; TRANSPORTING
63
SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
H
MARINE PROPULSION OR STEERING
1
Propulsive elements directly acting on water
02
of rotary type
12
with rotation axis substantially in propulsive direction
14
Propellers
28
Other means for improving propeller efficiency
Applicants: ROLLS-ROYCE AB[SE/SE]; Box 1010 681 29 KRISTINEHAMN, SE
Inventors: LOBELL, Anders; SE
JOHANSSON, Rikard; SE
Agent: HYNELL PATENTTJÄNST AB; P.O. Box 138 683 23 HAGFORS, SE
Priority Data:
1651610-607.12.2016SE
Title (EN) A METHOD OF AND A DEVICE FOR REDUCING THE AZIMUTHAL TORQUE ACTING ON A PULLING POD UNIT OR AZIMUTH THRUSTER
(FR) PROCÉDÉ ET DISPOSITIF DE RÉDUCTION DU COUPLE AZIMUTAL AGISSANT SUR UNE UNITÉ DE PROPULSEUR EN NACELLE OU SUR UN PROPULSEUR AZIMUTAL
Abstract:
(EN) This invention relates to a device and method), of reducing the azimuthal torque acting on a pulling pod unit or azimuth thruster (1) having a rotary pod housing (4) with a substantially vertical slewing axis (3A), a pulling propeller (7), and two downwardly directed fins (6) carried by the pod housing (4) abaft the slewing axis (3) adjacent the rear end (41) of the pod housing (4) and positioning said two downwardly directed fins (6) a distance (δ) apart, one on each side of a longitudinal plane (30) through the slewing axis (3A) on an aft part (40) of the pod housing (4) to extend substantially radially out from the pod housing (4), wherein said fins (6) are positioned to have their center planes (65) presenting a sharp angle (β) between the two fins (6) wherein the intersecting point of the center lines (65) of the fins (6) will intersect at a point above a horizontal center plane of the pod housing (4).
(FR) La présente invention concerne un dispositif et un procédé de réduction du couple azimutal agissant sur une unité de propulseur en nacelle ou sur un propulseur azimutal (1) qui possède un boîtier de nacelle rotatif (4) ayant un axe de pivotement sensiblement vertical (3A), une hélice de traction (7), et deux ailettes dirigées vers le bas (6), portées par le boîtier de nacelle (4) à l'arrière de l'axe de pivotement (3) adjacent à l'extrémité arrière (41) du boîtier de nacelle (4) et positionnant lesdites deux ailettes dirigées vers le bas (6) à une distance (δ) l'une de l'autre, une de chaque côté d'un plan longitudinal (30) à travers l'axe de pivotement (3A) sur une partie arrière (40) du boîtier de nacelle (4) pour s'étendre sensiblement radialement à l'extérieur du boîtier de nacelle (4), lesdites ailettes (6) étant positionnées afin que leurs plans centraux (65) présentent un angle aigu (β) entre les deux ailettes (6), le point d'intersection des lignes centrales (65) des ailettes (6) se croisant en un point au-dessus d'un plan central horizontal du boîtier de nacelle (4).
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Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)