| 摘要 |
FIELD: mechanical engineering; internal combustion engines. ^ SUBSTANCE: proposed muffler has housing with cross-section width S=(2.5-12/0)d, cross-section height H=(0.401.0)S, length of housing L=(4.0-26/0)d, side walls, inlet branch pipe, diameter d, outlet branch pipe, diameter d, perforated shell 6, length L1=(1..0-0.2)L. Cross section of perforated shell is star-like, housing is divided by partition into chamber of length L1=(o.56-0.59)L and chamber of length L2=(0.41-0.44)L. Space between housing and perforated shell is filled up with sound absorbing material. ^ EFFECT: improved efficiency of noise damping in low-frequency and high frequency ranges of sound frequencies at low counterpressure owing to increased area of contact of noise waves with sound-absorbing material. ^ 10 cl, 7 dwg
|
