To provide a propulsion unit capable of suppressing degradation of propulsion efficiency.SOLUTION: A propulsion unit comprises: a shroud which has a cylindrical shape to form a flow path with an upstream side as one side in the axial direction and a downstream side as the other side in the axial direction, and has a recessed part recessed from the inner circumferential surface and extending in the circumferential direction of the axis; a propeller rotatable around the axis, which includes multiple blades extending in the radial direction of the axis in the flow path and arranged in the circumferential direction and an outer peripheral rim having a cylindrical shape centered on the axis and extending in the axial direction beyond the blade, housed in the recessed part, and connecting the multiple blades; a motor which has a rotor provided on the outer peripheral rim and a stator provided in the shroud; and a cover which is provided so as to cover a part except the rotation trajectory of the blades at an opening of the recessed part.SELECTED DRAWING: Figure 1

    【課題】推進効率の低下を抑制することができる推進装置を提供する。【解決手段】推進装置は、軸線方向一方側を上流側とするとともに軸線方向他方側を下流側とする流路を形成する筒状をなして、内周面から凹むとともに軸線の周方向に延びる凹部を有するシュラウドと、流路内で軸線の径方向に延びるとともに周方向に配列された複数の羽根、及び、軸線を中心として羽根よりも軸線方向に延びる円筒状をなし、凹部に収容されているとともに、複数の羽根を接続する外周リムを有し、軸線回りに回転可能なプロペラと、外周リムに設けられたロータ、及び、シュラウドに設けられたステータを有するモータと、凹部の開口における羽根の回転軌跡を除く部分を覆うように設けられたカバーと、を備える。【選択図】図1


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    Title :

    PROPULSION UNIT


    Additional title:

    推進装置


    Contributors:

    Publication date :

    2024-04-10


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B63H Schiffsantrieb oder Steuerung der Schiffe , MARINE PROPULSION OR STEERING



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