NOISE SILENCER OF EJECTOR-TYPE BY KOCHETOV Russian patent published in 2017 - IPC F01N1/04 

FIELD: machine engineering.

SUBSTANCE: silencer has a body, a nozzle and an intake chamber, the nozzle is made conical with a cut of diameter D and is rigidly connected by means of acoustically transparent rigid element to the housing with formation of gap Z, wherein the housing is lined inside with sound-absorbing material coated with acoustically transparent film, wherein the housing is made of structural materials with a layer of soft vibration damping material applied on its surface on one or both sides. A sound-absorbing element of annular type is used as sound-absorbing material and made in the form of rigid and perforated walls, between which two layers are arranged: a sound-reflecting layer adjacent to the rigid wall, and a sound-absorbing layer adjacent to the perforated wall, wherein the layer of the sound-reflecting material is made of a complex profile consisting of uniformly distributed hollow tetrahedrons which allow to reflect sound waves incident in all directions.

EFFECT: improved efficiency of noise suppression.

3 dwg