ACTIVE AERODYNAMIC NOISE SUPPRESSOR Russian patent published in 2018 - IPC F01N1/04 

FIELD: noise suppression technique.

SUBSTANCE: invention refers to noise suppression. Silencer contains a body consisting of a cylindrical shell rigidly connected to end round plates having inlet and outlet branch pipes, wherein in housing perpendicular to aerodynamic flow direction jet chambers are arranged, these are formed by round discs with holes, wherein the reaction chambers are connected to the inlet pipe, also the resonant insert of the silencer and the outlet branch are attached to one of the end-face round plates symmetrically to the body, and an inlet nozzle is attached to the other end-face round plate axially symmetric to the body, wherein the resonant insert of the muffler is made in the form of a cylindrical sleeve attached coaxially to the housing to the end circular plate and consists of an acoustic-absorbing chamber and a resonance chamber, which are formed by rigid partitions, wherein at least two resonant inserts are arranged in the chamber and fixed on the sleeve, perpendicular to its axis, and the sound-absorbing chamber is formed by an end-face round plate with an outlet nozzle, rigid partition and part of a cylindrical sleeve of the resonant insert which is lined with sound absorbing material, at least three exhaust bushings are located in the sound absorption chamber, and are fixed on the sleeve, perpendicular to its axis, wherein the surfaces of the partitions, which face away from the resonance chamber, are lined with sound-absorbing round elements, and sound-absorbing ring elements are installed coaxially to the cylindrical body from its inner side, wherein a part of the end circular plate of the sound-absorbing chamber is lined with sound-absorbing material.

EFFECT: technical result is higher efficiency of noise suppression.

3 cl, 3 dwg