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    • 47. 发明申请
    • STRUT-MOUNTED MARINE PROPULSION UNIT
    • 安装海上推进装置
    • WO01070569A2
    • 2001-09-27
    • PCT/US2001/007238
    • 2001-03-07
    • B63H5/10B63H5/125B63H5/16B63H25/44B63H5/07B63H21/17B63H25/48
    • B63H5/125B63H5/10B63H5/16B63H25/44B63H2005/1256
    • A marine propulsion unit supported from a vessel by a strut contains an electric motor within a housing and a forward propeller driven by the electric motor and having a diameter larger than that of the housing. Hydrodynamic vanes projecting from the surface of the housing counteract tangential flow generated by the forward propeller. An aft section with a pair of counter-rotating blade rows driven by the electric motor is mounted at the rear of the housing and including a shroud surrounding the aft blade rows. The shroud is spaced from the housing so as to receive the boundary layer of liquid passing along the surface of the housing to inhibit cavitation and improve efficiency. Rearward portions of the shroud are movable to form a clamshell causing reversal of the flow of the liquid passing through the shroud.
    • 通过支柱从船舶支撑的船舶推进单元包含壳体内的电动机和由电动机驱动的直径大于壳体的直径的前向螺旋桨。 从壳体表面突出的流体动力叶片抵消由前进螺旋桨产生的切向流动。 具有由电动马达驱动的一对反转叶片排的后部安装在壳体的后部并且包括围绕后叶片行的护罩。 护罩与壳体间隔开,以便容纳沿壳体表面通过的液体的边界层以抑制空化并提高效率。 护罩的后部可移动以形成蛤壳,从而导致通过护罩的液体的流动的反转。