RUDDER DEVICE FOR SHIP

• Main Authors: ARII TOSHIHIKO, HASHIMOTO EIJI, TOMITA KAZUYUKI
• Format: Patent
• Language: English; Japanese
• Published: 30.06.2016
• Subjects: MARINE PROPULSION OR STEERING; PERFORMING OPERATIONS; RELATED EQUIPMENT; SHIPS OR OTHER WATERBORNE VESSELS; TRANSPORTING

PROBLEM TO BE SOLVED: To provide a rudder device for a ship which can improve the efficiency of a high-lift rudder having a rudder trunk.SOLUTION: A rudder blade is composed of a front edge 102a, an intermediate part 102b and a rear edge 102c in a contour of a horizontal cross section, the front edge 102a has a shape protruding frontward in a semi-circular shape, the intermediate part 102b continuing to the front edge 102a is widened in a width in a streamline shape, and has a shape that the width is gradually narrowed toward the narrowest width part 102f via a salient part 102e for internally wrapping a rudder trunk 107 after arriving at the widest width part 102d in a region of the streamline shape, the rear edge 102c continuing to the narrowest width part 102f of the intermediate part 102b has a fishtail shape that the width is gradually widened toward a rear-edge widest width part 102g having a prescribed width, the salient part 102e has a shape corresponding to a contour of the rudder trunk 107, a rudder face is salient toward both-broadside directions, and a plurality of fins 119 which hang out of the rudder face to both the broadsides toward a horizontal direction are aligned at the salient part 102e along an axial core direction of a rudder axis.SELECTED DRAWING: Figure 3 【課題】ラダートランクを備えた高揚力舵の効率を向上させることができる船舶用舵装置を提供する。【解決手段】舵ブレードは、水平断面の輪郭において前縁部１０２ａと中間部１０２ｂと後縁部１０２ｃからなり、前縁部１０２ａは前方へ半円形状に突出した形状をなし、前縁部１０２ａに連続する中間部１０２ｂは流線型状に幅が増大し、流線形状の部位における最大幅部１０２ｄに達した後に、ラダートランク１０７を内包する隆起部１０２ｅを経て最小幅部１０２ｆに向けて徐々に幅が減少した形状をなし、中間部１０２ｂの最小幅部１０２ｆに連続する後縁部１０２ｃは所定幅の後縁最大幅部１０２ｇに向けて徐々に幅が増大した魚尾形の形状をなし、隆起部１０２ｅはラダートランク１０７の外形に相応する形状をなして舵面が両舷側方向に隆起し、隆起部１０２ｅに舵面から水平方向に向けて左右両舷側に張り出す複数のフィン１１９を舵軸の軸心方向に沿って配列した。【選択図】図３