RUDDER SYSTEM

• Main Authors: ARII TOSHIHIKO, TANAKA YOSHIKAZU, KIMURA KOYU
• Format: Patent
• Language: English; Japanese
• Published: 16.01.2020
• Subjects: MARINE PROPULSION OR STEERING; PERFORMING OPERATIONS; RELATED EQUIPMENT; SHIPS OR OTHER WATERBORNE VESSELS; TRANSPORTING

To provide a rudder system improved in propulsion efficiency.SOLUTION: A rudder system includes one propulsion propeller 20 rotating clockwise at a viewpoint looking at bow side from stern side, and a rudder 10 installed on an axial line of the propulsion propeller. The propulsion propeller 20 has a propeller boss cap 21, the propeller boss cap 21 has a boss cap fin 22 generating back wash gyrating in the same direction as the gyrating flow of the propulsion propeller back wash, the rudder 10 has a rudder valve 60 on an axial line of the propulsion propeller 20, the rudder valve 60 has a port side fin 62 and a starboard fin 63 overhanging in respective broadsides on both the right and left broadsides of a rudder plate 30, the port side fin 62 and the starboard fin 63 are located in symmetrical positions to the axial line of the propulsion propeller 20 as well as along the axial line from the rudder valve 60 to the propulsion propeller 20.SELECTED DRAWING: Figure 1 【課題】推進効率の向上を図った舵システムを提供する。【解決手段】船尾側から船首側を見る視点において時計方向に回転する一基の推進プロペラ２０と、推進プロペラの軸心線上に配置した舵１０を備え、推進プロペラ２０は、プロペラボスキャップ２１を有し、プロペラボスキャップ２１は、推進プロペラ後流の旋回流と同方向に旋回する後流を発生させるボスキャップフィン２２を有し、舵１０は、推進プロペラ２０の軸心線上にラダーバルブ６０を有し、ラダーバルブ６０は舵板３０の左右両舷側にそれぞれの舷側方向に張り出す左舷フィン６２と右舷フィン６３を有し、左舷フィン６２と右舷フィン６３は、推進プロペラ２０の軸心線に対して対称の位置に、かつラダーバルブ６０から推進プロペラ２０の軸心線に沿って存在する。【選択図】図１