| 摘要 |
FIELD: acoustics.SUBSTANCE: element is designed for damping noise of compressor stations. Element comprises cover with circular collars for fixing cylindrical bushing. Covers are joined with a central rod equipped with hooks on both ends. Cylinder bushing includes two perforated shells - external and internal - space between which is filled with sound absorber. Outside perforated cylindrical bushing there is layer of acoustically transparent shell. Sound-absorbing material placed in inner cavity of sound absorber is made of unwinding roll, one end of which is rigidly fixed on central rod, and free end rests against inner shell to form in cross-section perpendicular to rod a closed shape in form of Archimedean spiral with air gaps increasing from center to periphery, at that it has higher porosity in comparison to sound absorber located inside shells. Covers have outer surfaces of fairings of conical shape.EFFECT: high efficiency of soundproofing at high frequencies.1 cl, 2 dwg |
