CH370281A - Soundproofing device for explosion engines - Google Patents

Description

  

      Sound-damping device for explosion engines According to the present invention, a sound-damping device for explosion engines is characterized in that a muffler pipe is inserted in the exhaust pipe which is enlarged compared to this pipe and which is divided into chambers arranged one behind the other by at least two perforated walls, with one in the first chamber the entrance side narrowing towards the first partition,

   truncated cone jacket provided with wall holes and in the second chamber a perforated jacket tube connected directly to the said truncated cone jacket and closed at the outlet end, while in the third chamber <B> each </B> most of the chamber cross-section is shut off, A meandering back and forth flow of the gases work together, which enforce transverse walls.



  An exemplary embodiment of the invention, object of the invention is shown as an axial section in the drawing.



  In the exhaust pipe <B> 1 </B> of an explosion engine, a sound-absorbing pipe 2, which is widened compared to this pipe, is inserted. This is through two perforated walls <B> 3, </B> 4 in three chambers <B> <I> A, </I> </B> <I> B, <B> C </B> <arranged one behind the other / I> divided. The first chamber <B> A </B> contains a truncated cone jacket <B> 5 </B> which narrows from the entrance side to the first partition <B> 3 </B> and is provided with wall holes <B> 50 </B>. B> which allows a substantial part of the gases to escape to the periphery of the pipe 2.



  The middle chamber B contains a relatively narrow, perforated jacket tube <B> 6 </B> closed at the end, which accepts the residual gases from the interior of the truncated cone jacket <B> 5 </B> and lets them escape.



  The gases pass through the perforated wall 4 from the chamber B into the chamber <B> C </B>, where transverse walls <B> 81, 82, 83 </B> are arranged, which <B> each </B> Block off most of the cross-section and offset from one another with respect to the open passages in such a way that a meandering back and forth flow is forced upon the gases. These transverse walls 81, 82, 83 are supported against one another against the perforated wall 4 by a perforated casing tube 7.



  Tests with such a device have proven a high degree of sound attenuation with a small reduction in the motor efficiency.

 

Claims (1)

<B> PATENT CLAIM </B> Schalldämpfungseinnichtung for explosive engines, characterized in that a compared to this pipe expanded silencer pipe is used in the exhaust pipe, which is divided by at least two perforated walls in one behind the other chambers, with one in the first chamber , from the entrance side to the first partition wall narrowing, provided with wall holes truncated cone jacket and in the second chamber a directly connected to the said truncated cone jacket, at the outlet end closed perforated jacket pipe is arranged, while in the third chamber each shut-off most of the chimney cross-section, in their interaction a meandering back and forth flow of the gases are built in. <B> SUBCLAIM </B> Soundproofing device for explosion engines according to patent claim, characterized in that the transverse walls of the third chamber are supported against one another and against the second perforated wall with the aid of a perforated casing tube.