The invention discloses a noise reduction structure of a water-jet propulsion pump. The noise reduction structure of the water-jet propulsion pump comprises a sleeve, more than one supporting cavity is formed in the outer wall surface of the sleeve, a through hole penetrating through the outer wall surface of the sleeve is formed in each supporting cavity, a communicating pipe for communicating a hollow part of the sleeve with the outside is fixed to each through hole, each supporting cavity is filled with a noise reduction unit matched with the corresponding supporting cavity, and each noise reduction unit is provided with a blind hole matched with the corresponding communicating pipe; the noise reduction unit comprises a sound absorption block and an outer wrapping layer completely wrapping the sound absorption block, the blind hole penetrates through the outer wrapping layer and then penetrates into the sound absorption block, a hollow cavity is formed in the sound absorption block, the hollow cavity and the blind hole are located on the same straight line, and the blind hole is not communicated with the hollow cavity; the noise reduction structure of the water jet propulsion pump is simple in structure, reasonable in design, large in sound absorption frequency range, good in noise reduction effect, low in cost and good in application prospect.

    本发明公开了一种喷水推进泵降噪结构,喷水推进泵降噪结构包括套管;套管的外壁面上设有一个以上支撑腔,支撑腔内开有贯穿套管外壁面的穿孔且穿孔处固定有连通套管中空部与外界的连通管,支撑腔内填充有与支撑腔匹配的降噪单元,降噪单元上开有与连通管匹配的盲孔,降噪单元包括吸声块和完全包裹吸声块的外包层,所述盲孔穿透外包层后穿入吸声块中,吸声块中设有一中空腔,中空腔与盲孔处于同一条直线上且盲孔与中空腔不连通;套管外还设有用于固定降噪单元的降噪单元固定装置,本发明的喷水推进泵降噪结构,结构简单且设计合理,吸声频率范围大,降噪效果好且成本较低,应用前景好。


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    Title :

    Noise reduction structure of water jet propulsion pump


    Additional title:

    一种喷水推进泵降噪结构


    Contributors:
    WANG DEZHONG (author) / GONG BO (author) / YIN JUNLIAN (author) / ZHANG ZHENGCHUAN (author) / YANG CHENG (author) / LI NING (author)

    Publication date :

    2023-08-01


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B63H Schiffsantrieb oder Steuerung der Schiffe , MARINE PROPULSION OR STEERING / B63G OFFENSIVE OR DEFENSIVE ARRANGEMENTS ON VESSELS , Angriffs- oder Verteidigungsanordnungen auf Schiffen



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