To suppress an occurrence of a swirl in a wing end of a blade and an increase in frictional loss occurring during propulsion of a vessel.SOLUTION: A vessel propulsion device for propelling a vessel comprises: a duct provided below a hull of the vessel; and a propeller arranged to be rotatable inside the duct. The propeller includes blades and a cylinder member which is a cylindrical surrounding the blades and fixed to the wing ends of the blades. In a cross-section view in an extending direction of the duct, when a virtual line passing a front edge end and a rear edge end of the duct is defined as a first line, and a line connecting a center of an inscription circle in contact with both of an inner periphery surface and an outer periphery surface of the duct from the front edge end to the rear dege end is defined as a second line, the second line is positioned on an outer periphery surface side of the duct compared to the first line.SELECTED DRAWING: Figure 3
【課題】羽根の翼端における渦の発生と船舶の推進中に発生する摩擦損失の増大とを抑制できる。【解決手段】船舶を推進させる船舶推進装置は、船舶の船体の下方に設けられるダクトと、ダクトの内部に回転可能に配置されるプロペラと、を備え、プロペラは、羽根と、羽根を取り囲む筒状の筒状部材であって、羽根の翼端と固定される筒状部材と、を含み、ダクトの延在方向の断面視において、ダクトの前縁端と後縁端とを通過する仮想のラインを第1ラインとし、ダクトの内周面と外周面の両方に接する内接円の中心をダクトの前縁端から後縁端まで結んだラインを第2ラインとすると、第2ラインは第1ラインよりもダクトの外周面側に位置する。【選択図】図3
VESSEL PROPULSION DEVICE, VESSEL
船舶推進装置、船舶
2022-10-13
Patent
Electronic Resource
Japanese
IPC: | B63H Schiffsantrieb oder Steuerung der Schiffe , MARINE PROPULSION OR STEERING |
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