MULTI-SECTION NOISE SUPPRESSOR Russian patent published in 2018 - IPC F01N1/00 

FIELD: acoustics; manufacturing technology.

SUBSTANCE: invention relates to noise suppression. Silencer comprises a cylindrical housing, end inlet branch pipe rigidly connected with central pipe, having perforation and forming with housing by means of perforated partitions in form of at least one coaxially arranged to housing and central pipe of additional perforated pipe and ends of all pipes are rigidly connected to housing by means of solid partitions, wherein one of them is rigidly connected with inlet branch pipe, and the other one is located on the opposite side of the branch pipe, a sound-absorbing element is arranged between the housing and the perforated pipe and in the end part of central pipe there is a sound-absorbing element locked by lock washer. Sound-absorbing element, overlapping the holes in the end part of the central pipe, is made of annular type and in the form of two perforated walls between which there is a sound-absorbing element, the sound-absorbing element being made of two-layered or multi-layered.

EFFECT: higher efficiency of noise suppression.

1 cl, 3 dwg