Impedance composite exhaust silencer
An exhaust muffler and impedance composite technology, which is applied in the direction of muffler, machine/engine, engine components, etc., can solve the problems of poor muffler effect, high muffler back pressure, no effect of removing high-frequency noise, etc.
Inactive Publication Date: 2015-01-07
ZHUCHENG HAIDEWEI MACHINE
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Problems solved by technology
[0003] It mainly adopts the resistant exhaust muffler structure with pipe cross-section expansion and cross-section contraction. Although it can effectively remove middle and low frequency noise, it is basically ineffective in removing high frequency noise. Moreover, the air velocity is large and the back pressure of the muffler is high. Poor noise reduction effect
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[0011] like figure 1 , 2 As shown, the front end cover 1 and the rear end cover 2 of the present invention are respectively engaged with the two ends of the casing 3, and the partition I4 and the partition II5 arranged inside the casing 3 divide the interior into three parts, and the intake diffuser pipe 6 is located on the upper side of the housing 3, one end of the air intake diffuser 6 is air intake, the other end is closed, the outlet diffuser 8 is located on the lower side of the housing 3, one end of the outlet diffuser 8 is exhausted, and the other end is closed. Closed, the intermediate pipe 7 is located at the middle part between the air intake diffuser 6 and the air outlet diffuser 8, the upper part of one end of the intermediate pipe 7 communicates with the bottom of the air intake diffuser 6, and the other end lower part of the intermediate pipe 7 connects with the air intake diffuser 8. The upper part of the outlet diffuser pipe 8 is connected, and the sound-abso...
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The invention discloses an impedance composite exhaust silencer which is characterized in that a front end cover and a lower end cover are engaged at two ends of a casing respectively, and the casing is divided into three parts by a first partition and a second partition which are arranged in the casing. An air inlet diffusion tube is arranged on the upper side in the casing, an air outlet diffusion tube is arranged on the lower side in the casing, and a middle tube is arranged in the middle between the air inlet diffusion tube and the air outlet diffusion tube. The upper portion of one end of the middle tube is communicated with the bottom of the air inlet diffusion tube, the lower end of the other end of the middle tube is communicated with the upper portion of the air outlet diffusion tube, and the gap between the air inlet diffusion tube and the inner wall of the casing and the gap between the air outlet diffusion tube and the inner wall of the casing are each filled with sound absorption material. The impedance composite exhaust silencer can effectively remove noise at all frequency bands including the high, middle and low ones by making full use of reduction of resistance of a perforated tube and the vibration friction silencing effect of the perforated tube, and is low in backpressure and good in the silencing effect.
Description
technical field [0001] The invention relates to an engine exhaust muffler, in particular to an impedance composite exhaust muffler. Background technique [0002] The muffler is a device that prevents sound transmission and allows airflow to pass through, and is an important measure to eliminate aerodynamic noise. Currently, existing exhaust mufflers [0003] It mainly adopts the resistant exhaust muffler structure with pipe cross-section expansion and cross-section contraction. Although it can effectively remove middle and low frequency noise, it is basically ineffective in removing high frequency noise. Moreover, the air velocity is large and the back pressure of the muffler is high. The noise reduction effect is also poor. Contents of the invention [0004] The object of the present invention is to provide an impedance composite exhaust muffler capable of removing noise in all frequency bands, low back pressure and good noise reduction effect. [0005] In order to...
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IPC IPC(8): F01N1/10
Inventor 王锋英张振财
Owner ZHUCHENG HAIDEWEI MACHINE