SUPPRESSOR OF GAS FLOW NOISE OF CONE TYPE Russian patent published in 2017 - IPC F01N1/08 

FIELD: machine engineering.

SUBSTANCE: suppressor contains a diffuser body frame with inlet and outlet openings and throttling gratings mounted in series in the body frame and made with honeycomb cells. The total area of the cells of each grating decreases away from the inlet, each even throttling grating is made with honeycomb cells filled with sound-absorbing elements staggered along the cross-section of the throttling grating. The element is made in the form of a rigid and perforated walls, between which two layers are positioned: a sound-reflecting layer adjacent to the rigid wall and a sound-absorbing layer adjacent to the perforated wall, or the element is made as rigid and perforated walls, between which the layers of sound reflecting, and sound-proof materials of different density arranged in two layers are located. The layers of sound-absorbing material are made from heat insulation material.

EFFECT: improved efficiency of suppression.

5 dwg