PROBLEM TO BE SOLVED: To provide a water jet propulsion ship that can reduce an influence on a surrounding environment by reducing sufficiently an exhaust gas temperature while reducing signatures during operation of a water jet.SOLUTION: The water jet propulsion ship is equipped with: a flow path forming portion 2 that forms a flow path R1 through which water W can be introduced from an opening portion arranged at a hull bottom; a nozzle 14 that is provided at an end part of the flow path forming portion 2 and formed so that the cross sectional area of the flow path gradually decreases in an extending direction of the flow path forming portion 2; an impeller 3 that pressure-feeds the water W introduced from the opening portion; an internal combustion engine E that drives the impeller 3; an exhaust/flow path forming portion 15 that has a first branched portion 15b which is merged with and connected to the flow path forming portion 2 and a second branched portion 15c having an opening on an outer surface of a hull 100, and guides exhaust gas G exhausted from the internal combustion engine E; and a valve portion 40 which can adjust a flow rate of the exhaust gas G flowing to the first branched portion 15b and the second branched portion 15c.SELECTED DRAWING: Figure 2

    【課題】ウォータージェットの作動時には、低シグネチャー化を図り、また排気ガス温度を十分に低下させて周囲環境への影響を低減することが可能なウォータージェット推進船を提供する。【解決手段】ウォ—タージェット推進船は、船底から開口部から水が導入可能な流路R1を形成する流路形成部2と、流路形成部2の端部に設けられ、流路形成部2の延びる方向で徐々に流路の断面積が減少するように形成されるノズル14と、開口から導入された水Wを圧送するインペラ3と、インペラ3を駆動する内燃機関Eと、流路形成部2に合流接続される第一分岐部15bと、船体100の外面に開口を有する第二分岐部15cと、を有し内燃機関Eから排出される排気ガスGを導く排気流路形成部15と、第一分岐部15bと第二分岐部15cとに流れる排気ガスGの流量を調節可能な弁部40と、を備える。【選択図】図2


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    Title :

    WATER JET PROPULSION SHIP


    Additional title:

    ウォータージェット推進船


    Contributors:

    Publication date :

    2016-06-20


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B63H Schiffsantrieb oder Steuerung der Schiffe , MARINE PROPULSION OR STEERING / F01N GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL , Schalldämpfer oder Auspuffvorrichtungen für Gase von Kraft- und Arbeitsmaschinen oder von Kraftmaschinen allgemein



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