NOISE SILENCER Russian patent published in 2021 - IPC F16L55/33 

FIELD: physics.

SUBSTANCE: silencer of hydrodynamic noise is a shell with a working medium, an inlet hole in the cover and a blind opposite wall. In the shell there is a rigid disk dividing it into two cavities - one cavity is filled with air, another cavity is filled with working medium (for example, water). Tightness of cavity filled with air is provided by annular elastomeric gaskets. Cavity with air communicates with atmosphere through outlet channel with shutoff valve. Into the hard disk on the side of the inlet hole the insert from the elastic sound-absorbing element is mounted, as well as on the side of the shell inlet opening to the rigid disc, a detachable adjusting rod-line is attached in the centre for the axial movement of the disk.

EFFECT: use of the invention provides higher acoustic efficiency, wider range of noise absorption.

1 cl, 1 dwg