SU1364755A1 - Noise muffler - Google Patents

Abstract

The invention relates to the field of engine-building and makes it possible to increase the efficiency of a silencer. Its noise-attenuating elements are made in the form of volumes formed by perforated truncated cones 4 and 5, conjugated with large bases. An annular partition 6 is installed in the place of their conjugation. On both sides of it, continuous partitions 7 and 8 are installed. Due to the repeated change in the direction of gas movement, separation into smaller jets, as well as due to the damping effect of partitions 7 and 8, energy decreases and gas noise. 1 il.

Description

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FIELD OF THE INVENTION The invention relates to mechanical engineering, in particular, engine-building, in particular, to noise suppressors of an advanced internal combustion engine.

The aim of the invention is to increase the effectiveness of the noise suppressor.

The drawing shows the proposed muffler, longitudinal resolution

The silencer comprises a housing 1 with inlet 2 and exhaust 3 with nozzles and sound attenuating elements, formed as volumes formed by perforated truncated cones 4 and 5, conjugated by their large bases. The sound-attenuating elements are provided with at least one ring 6 and two continuous 7 and 8 transverse partitions, matching each other, with inlet 2 and exhaust 3 nozzles with smaller bases of the cones, and the ring partition 6 is installed at the junction of the larger bases of the cones 4 and 5, and the solid partitions 7 and 8 are on either side of it, and the large bases of the cones 4 and 5 are made with diameters equal to the inner diameter of the housing 1. With the help of truncated cones 4 and 5, and inside the noise muffling elements with 6-8 partitions AA 1 is divided into a number of Ka ftep.

The recommended geometric characteristics of the silencer are as follows: The diameter of the housing 1 is 2.5-3.0 diameters of the inlet 2 or outlet

3pipes; height of truncated cone

4 and 5 is 0.5 of the diameter of the housing 1; the diameter of the cola hole: the 1st septum 6 is 1.5 times the diameter of the inlet 2 or outlet 3 of the nozzles; the total area of the perforations of the perforations of the truncated cones 4 and 5 with respect to the partitions 7 and 8 is 1.2 the cross-sectional area of the inlet 2 or outlet 3 nozzles.

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The muffler works as follows.

Claims (1)

The exhaust gases flow through the inlet pipe 2 into the volume of the truncated cone 4 and, reflecting from the solid partition 7, through the perforation holes into the chamber formed by the housing 1 and the outer surface of the cone 4, from where through the perforation holes in the area between the solid 7 and the ring 6 partitions in the noise. absorbing element. Further gases through the opening of the annular partition 6 enter the volume of a truncated cone 5, from where it passes through the holes of its perforation, bypassing the partition 8, into the next noise suppressor element, where a similar movement of the gas takes place before it leaves the atmosphere. In such a movement, due to the repeated change of the direction of movement, separation into smaller jets, as well as due to the damping effect of the barriers 7 and 8, the energy and noise level of the gases is reduced. Formula of Invention A silencer, predominantly an internal combustion engine, comprising a housing with inlet and exhaust manifolds and sound attenuating elements made in the form of volumes formed by perforated truncated cones, conjugated by their large bases, about tl and h a-. In order to increase efficiency, the sound-attenuating elements are equipped with at least one ring and two continuous transverse partitions, are conjugated with each other, with inlet and outlet nozzles with smaller bases of cones, and the ring partition is installed in the place of large bases of the cones, and solid partitions on either side of it, and large bases of the cones are made with diameters equal to the internal diameter of the body.