PROBLEM TO BE SOLVED: To provide an impeller for a water jet pump configured to effectively suppress occurrence of cavitation even in a high-speed rotation area.SOLUTION: An impeller includes: a plurality of blades 10a, 10b, 10c fixed or formed integrally with a first boss part 10; and a plurality of blades 20a, 20b, 20c fixed or formed integrally with a second boss part 20, which is fixed to the first boss part, and having a rotational radius smaller than that of the blades of the first boss part. The impeller further includes a ring-shaped band body 30 with a predetermined width around the blades of the second boss part.SELECTED DRAWING: Figure 1

    【課題】高回転域においてもキャビテーションの発生を効果的に抑制し、推進効率の良好なウォータージェットポンプ用のインペラを提供する。【解決手段】第一ボス部10に一体に固定され或は一体形成された複数枚の羽根10a,10b,10cと、前記第一ボス部に固定された第二ボス部20に一体に固定され或は一体形成された複数枚の羽根20a,20b,20cであって前記第一ボス部の羽根よりも回転半径の小さな羽根を備えた構成において、該第二ボス部の羽根周囲に所定幅のリング状の帯状体30を具備した。【選択図】図1


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    Title :

    IMPELLER


    Additional title:

    インペラ


    Contributors:

    Publication date :

    2017-05-18


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    F04D Strömungsarbeitsmaschinen , NON-POSITIVE-DISPLACEMENT PUMPS / B63H Schiffsantrieb oder Steuerung der Schiffe , MARINE PROPULSION OR STEERING



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