Comprehensive noise reduction performance of saturated steam silencers
Release time:
2021-03-22
A saturated steam silencer typically consists of several components, including an exhaust pipe, a connecting threaded sleeve, a silencing tube, and a tube core. An oil-immersed asbestos sealing ring is installed inside the connecting threaded sleeve to prevent air leakage at the joint between the exhaust pipe and the silencing tube. Inside the silencing tube, seven partitions are welded, dividing the tube into eight sound-absorbing chambers—seven expansion chambers and one resonant chamber. On top of the tube core, there is an inverted triangular flow guide groove along with numerous small holes. When the high-temperature exhaust gases from the engine enter the saturated steam silencer through the exhaust pipe at high speed, they pass through these components.
A saturated steam silencer typically consists of several components, including an exhaust pipe, a connecting threaded sleeve, a silencing cylinder, and a cylinder core. The connecting threaded sleeve is fitted with an oil-immersed asbestos sealing ring to prevent air leakage at the joint between the exhaust pipe and the silencing cylinder. Inside the silencing cylinder, seven partitions are welded, dividing the cylinder into eight sound-absorbing chambers—seven expansion chambers and one resonant chamber. On top of the cylinder core, there is an inverted triangular flow guide groove along with numerous small holes. When the high-temperature exhaust gases from the engine enter the saturated steam silencer through the exhaust pipe at high speed, they pass through these components.
Due to the gradually increasing cross-sectional area of the silencer, the airflow is allowed to expand, thereby attenuating pulsating noise. As the airflow continues to pass through the expansion chambers, it is blocked by partitions, forcing it to flow only through the throttles in the partitions and the central core. Consequently, the airflow is suddenly compressed and divided into numerous fine streams, which then rapidly expand again. This series of abrupt changes significantly attenuates the sound energy, thus effectively reducing exhaust noise.
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