ELEMENT OF KOCHETOV NOISE SUPPRESSOR Russian patent published in 2016 - IPC F01N1/04 

FIELD: engines.

SUBSTANCE: invention relates to noise suppression equipment of compressor stations and test boxes for gas turbine engines. Silencer incorporates cylindrical frame in form of perforated bushing and covers, filled with sound absorber, layer of acoustic transparent shell made of capronic net of glass cloth is arranged outside of bushing, and frame comprises cover with circular collars for cylindrical bushing fixing, wherein covers are connected by central rod with hooks on both ends, and cylindrical bushing consists of two perforated shells, external and internal, space between which is filled with sound absorbing element. Sound-absorbing material placed in sound absorber inner cavity 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 perpendicular to rod cross-section, of closed shape in form of Archimedean spiral with air gaps increasing from center to periphery. Covers have conical shape fairings at outer surfaces. Sound absorbing element contains perforated walls, between which layers of sound reflecting, as well as sound-absorbing materials of different density are arranged.

EFFECT: technical result is higher efficiency of noise suppression.

1 cl, 2 dwg