Exhaust silencer special for eliminating low-frequency noise
An exhaust muffler and low-frequency noise technology, which is applied in the direction of noise reduction devices, machines/engines, engine components, etc., can solve the problems of unsatisfactory low-frequency noise suppression effect and inability to effectively reduce low-frequency noise, etc., and achieve good noise reduction effect , Eliminate low-frequency noise, good effect
Inactive Publication Date: 2014-12-24
ZHUCHENG HAIDEWEI MACHINE
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Problems solved by technology
However, the contradiction of this kind of muffler is that it cannot effectively reduce the low-frequency noise of a certain frequency, so the muffler effect on low-frequency noise is not ideal.
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[0012] Such as figure 1 , 2 , 3, and 4, the present invention is respectively engaged with a front end cover 2 and a rear end cover 3 at both ends of the cylindrical shell 1, and passes through the first partition 4 and the second partition on the upper and lower sides of the interior of the cylindrical casing 1. 5 and the third partition 6 are supported with an intake diffuser 7 and an air outlet diffuser 8, one end of the intake diffuser 7 protrudes from the front end cover 2, and the other end is closed, and one end of the outlet diffuser 8 stretches out The end cover 3 is closed at the other end, and the closed end of the air intake diffuser 7 is covered with an intermediate pipe 9, and the outer surfaces of the air intake diffuser 7, the air outlet diffuser 8 and the intermediate pipe 9 are respectively provided with mesh air holes , vent holes 10 are respectively provided on both sides of the second partition 5 . Through the above settings, the engine exhaust pipe ente...
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The invention discloses an exhaust silencer special for eliminating low-frequency noise. The exhaust silencer is characterized in that two ends of a cylindrical shell are respectively meshed with a front end cover and a back end cover; an air inlet diffusion tube and an air outlet diffusion tube are supported on the upper side and the lower side in the cylindrical shell through a first partition, a second partition and a third partition; an intermedium tube is arranged at the closed end of the air inlet diffusion tube in a sleeving manner; the outer surfaces of the air inlet diffusion tube, the air outlet diffusion tube and the intermedium tube are provided with netty air holes; two sides of the second partition are respectively provided with air holes. Therefore, the exhaust silencer retains an advantage of good effect of eliminating medium- and high-frequency noise of a resistant exhaust silencer, the low-frequency noise of an engine is effectively eliminated through reflecting action between the tubes, and the exhaust silencer achieves a good effect in the actual vehicle-mounted use.
Description
technical field [0001] The invention belongs to engine exhaust mufflers, in particular to a special exhaust muffler which utilizes the resonance between tubes to eliminate engine low-frequency noise. Background technique [0002] At present, the existing engine exhaust muffler mainly adopts the resistant exhaust muffler structure of pipe cross-section expansion and cross-section contraction. Due to the change of acoustic reactance at the sudden change of the section of the sound wave, part of the sound wave is reflected back to the sound source without passing through the muffler. The outlet, so as to achieve the purpose of noise reduction. This kind of resistant exhaust muffler has a good noise reduction effect on medium and high frequency noise. However, the contradiction of this kind of muffler is that it cannot effectively reduce the low-frequency noise of a certain frequency, so the muffler effect on low-frequency noise is not ideal. Contents of the invention [000...
Claims
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IPC IPC(8): F01N1/02F01N1/08
Inventor 翟明超王龙
Owner ZHUCHENG HAIDEWEI MACHINE