The invention relates to a three-layer folding shed windshield with high sound insulation performance, which comprises an outer folding shed and an inner folding shed which are fixed to a mounting frame, the outer folding shed is a double-layer folding shed and comprises U-shaped outer shed cloth and U-shaped inner shed cloth arranged in the outer shed cloth, the outer shed cloth and the inner shed cloth are oppositely combined to form a sound insulation cavity, the overlapping position of the outer shed cloth and the inner shed cloth is fixed through sewing threads, and the end parts of the adjacent outer shed cloth are clamped through cloth clamping profiles. The three-layer folding shed windshield structure is designed for meeting the higher and higher sound insulation requirements of railway vehicles and reducing exposure of sewing joints as much as possible, two sound insulation cavities are formed by three layers of shed cloth, and the sound insulation and heat insulation effects can be improved on the basis of an original double-layer folding shed windshield. By means of the three-layer folding shed windshield, the water leakage risk of the folding shed can be reduced, the sound insulation and heat insulation effects can be obviously improved, and through test comparison, after only a double-layer folding shed structure is changed into a three-layer folding shed structure, the air sound weighted sound reduction index Rw is improved to 42 dB from 40 dB.

    本发明涉及一种高隔音性能三层折棚风挡,包括固定于安装框的外折棚和内折棚,外折棚为双层折棚,包括U型外棚布和置于外棚布内的U型内棚布,所述外棚布和内棚布对合形成隔音腔室,外棚布和内棚布交叠处通过缝纫线固定,并且相邻外棚布的端部通过夹布型材夹紧。本发明针对轨道车辆隔音越来越高的要求,以及尽可能减少缝纫接头外露,本发明设计了一种三层折棚风挡结构,使用三层棚布形成2个隔音空腔,在原有双层折棚风挡的基础上可提高隔音隔热效果。通过本发明可减少折棚漏水风险,隔音和隔热效果可明显得到提升,通过试验比较,仅将双层折棚结构改为三层折棚结构后空气声计权隔声量Rw由40dB提升到了42dB。


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    Title :

    Three-layer folding shed windshield with high sound insulation performance


    Additional title:

    一种高隔音性能三层折棚风挡


    Contributors:
    LI KANG (author) / LIU YULONG (author) / WANG XIAOYU (author) / SHAN QUNFA (author) / WU JUN (author) / WANG YING (author) / HU QINYI (author) / XIAO FEI (author) / ZHU CHAO (author) / ZANG TONGTONG (author)

    Publication date :

    2022-01-21


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B61D Einzelheiten oder Arten des Wagenaufbaus von Eisenbahnfahrzeugen , BODY DETAILS OR KINDS OF RAILWAY VEHICLES



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