COMBINATION TYPE NOISE SILENCER Russian patent published in 2007 - IPC F01N1/00 

FIELD: processes and equipment for noise silencing.

SUBSTANCE: combination type noise silencer includes cylindrical housing rigidly joined with end inlet branch pipe and with outlet branch pipe; sound absorber arranged between cylindrical housing and perforated member; acoustically transparent material arranged between perforated member and sound absorber. Sound absorbing cylindrical insert is arranged along axis of nose silencer. On one end side of perforated cylindrical insert cone shaped deflector is mounted. Cylindrical insert is secured to inlet and outlet branch pipes at least by means of two rigidity ribs arranged in plane normal to axis of noise silencer. Sound absorber is arranged inside cylindrical insert. Acoustically transparent material placed between perforated member of insert and sound absorber is also arranged inside said cylindrical insert.

EFFECT: improved efficiency of noise silencing.

7 cl, 2 dwg