Exhaust silencer special for engineering machine vehicle
A technology for exhaust mufflers and construction machinery vehicles, which is applied in exhaust devices, mechanical equipment, machines/engines, etc., can solve the problems of unsatisfactory high-frequency noise muffling effect, and no resistive sound-absorbing materials are arranged, so as to achieve the purpose of eliminating noise. Good sound effect, good practical effect, noise cancellation effect
Inactive Publication Date: 2014-12-24
ZHUCHENG HAIDEWEI MACHINE
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Problems solved by technology
For high-frequency noise, because the number of perforated pipe sections and perforated plates that are good at high-frequency noise attenuation is small, and there is no resistive sound-absorbing material that is good at high-frequency noise attenuation, the high-frequency noise The noise reduction effect of frequency noise is not ideal
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[0009] Such as figure 1 As shown, the present invention welds the upper end cover 2 and the lower end cover 3 respectively at the two ends of the housing 1, and the partition 4 divides the inside of the housing 1 into two parts, between the lower end cover 3 and the partition 4, close to the lower end cover 3 The air intake diffuser pipe 5 is installed in parallel on the side, and its inlet passes through the shell 1 to contact the outside world, and the other end is closed. Glass fiber 8 is filled between the net plate 7 and the upper end cover 2, and the air outlet diffusion pipe 9 is vertically installed between the net plate 7 and the partition plate 4, one end of which is closed, and the other end passes through the shell 1 in the shape of a horn, and is in contact with the outside world .
[0010] Through the above settings, the noise entering the present invention from the engine exhaust pipe enters between the lower end cover 3 and the dividing plate 4 through the int...
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The invention discloses an exhaust silencer special for an engineering machine vehicle. The exhaust silencer is characterized in that an upper end cover and a lower end cover are welded to the two ends of a shell respectively, the interior of the shell is divided into two parts by a separation plate, an air inlet diffusion pipe is arranged at the position, close to one side of the lower end cover, between the lower end cover and the separation plate in parallel, an inlet of the air inlet diffusion pipe penetrates through the shell to be in contact with the outside, the other end of the air inlet diffusion pipe is closed, a flange plate is arranged at the inlet end of the air inlet diffusion pipe, a screen plate is arranged on the inner side of the upper end cover, an air outlet diffusion pipe is vertically arranged between the screen plate and the separation plate, one end of the air outlet diffusion pipe is closed, and the other end of the air outlet diffusion pipe penetrates through the shell in an ox horn shape and is in contact with the outside. Through the arrangement, the advantages of centering and the good low-frequency noise elimination effect of a common resisting exhaust silencer are kept, high-frequency noise is eliminated through repeated steering of airflow and vent holes many times, the noise generated by an engine is eliminated well, and the better practicality effect is achieved.
Description
technical field [0001] The invention relates to an engine exhaust muffler for a construction machinery vehicle, in particular to a special exhaust muffler for a construction machinery vehicle. 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 middle and low frequency noise. For high-frequency noise, because the number of perforated pipe sections and perforated plates that are good at high-frequency noise attenuation is small, and there is no resistive sound-absorbing material that is good at high-frequency n...
Claims
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IPC IPC(8): F01N13/00F01N1/00
Inventor 王冈垒郑昆
Owner ZHUCHENG HAIDEWEI MACHINE