The present invention provides a rudder whose internal space is empty. To reduce sound resonance caused by water current collision, cavitation, or the like, the present invention comprises filling with non-combustible/flame-retardant sound-absorbing material, and installation of holes for construction. During maintenance work after long-term operation, defects such as erosion and pitting in a rudder steel structure must be restored and repaired by welding, or the like, so the filled sound-absorbing material should not cause a fire, so the filling material must have non-combustible/flame-retardant properties. The present invention relates to selection of non-flammable/flame-retardant filled sound-absorbing materials to prevent fire during repair work.

    내부 공간이 빈 형태의 방향타에 있어 수류 충돌, Cavitation등에 의하여 발생한 소리 울림을 줄이기 위하여 불연성/난연성 흡음재를 충진하는 것과 이를 시공하기 위한 구멍의 설치. 장기간의 운항 후 유지보수 작업 중 방향타 철골 구조물에 발생한 침식, 점식 등 발생한 결함을 육성 용접 등으로 복원 수리시에 충진된 흡음재에 의한 화재가 발생하지 않아야하므로 충진재는 불연/난연성의 성질을 가져야 한다. 수리작업 시 화재를 방지하기 위한 충진 흡음재의 불연성/난연성에 대한 선정


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    Title :

    / Flame-Retarding Material Filling into Rudder Blade for Sound-Absorbing


    Additional title:

    선박 방향타 내부에 불연/난연성 흡음재 충진


    Contributors:

    Publication date :

    2023-07-13


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Korean


    Classification :

    IPC:    B63H Schiffsantrieb oder Steuerung der Schiffe , MARINE PROPULSION OR STEERING / B63B Schiffe oder sonstige Wasserfahrzeuge , SHIPS OR OTHER WATERBORNE VESSELS



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