INDUSTRIAL VACUUM CLEANER ACTIVE NOISE SUPPRESSOR Russian patent published in 2018 - IPC F01N1/04 

FIELD: acoustics.

SUBSTANCE: invention relates to the noise suppression equipment. Silencer contains a body consisting of a cylindrical shell rigidly connected to end round plates having inlet and outlet branch pipes, while in the body, perpendicular to the direction of flow of the aerodynamic flow, there are placed reactive chambers formed by round discs with holes, the reaction chambers being connected to the inlet pipe, to one of the end-face round plates, axisymmetric to the body, a resonant insert of the muffler and a discharge branch pipe are attached, and to the other, axisymmetric to the body, a reactive part of the muffler with an inlet pipe is attached, at that, the silencer reactive part is installed perpendicular to the aerodynamic flow direction and consists of at least three reactive chambers, formed by circular disks with holes coaxial with the housing and the inlet branch pipe, and the resonant insert of the silencer is made in the form of a cylindrical sleeve attached coaxially to the body to the end circular plate and consists of an acoustic-absorbing chamber and a resonance chamber formed by rigid partitions, at the same time in the resonant chamber there are at least two resonant inserts fixed on the sleeve, perpendicular to its axis, sound-absorbing chamber is formed by an end-face round plate with a discharge nozzle, a rigid partition and a part of a cylindrical sleeve of the resonant insert that is lined with sound absorbing material, and in the sound-absorbing chamber there are at least three exhaust bushings fixed to the sleeve, perpendicular to its axis.

EFFECT: higher efficiency of noise suppression.

3 cl, 2 dwg