SU1245727A1 - Internal combustion engine exhaust silencer - Google Patents

Description

The invention relates to mechanical engineering, in particular, engine-building ,. but. precisely to the exhaust silencer of the internal combustion engine

The purpose of the invention is to increase the efficiency of the silencer.

The drawing shows a silencer, a longitudinal section.

The silencer comprises a housing 1 with inlet 2 and outlet 3 nozzles: the first 4, the second 5, the third 6 and the fourth 7 transverse partitions forming the inlet 8, the first 9, the second 10, the third 11 the central and the outlet 12 chambers and the central a perforated pipe 13 installed coaxially to the body 1, the first partition 4 being perforated with the perforation located on the periphery and spherical with the direction of the sphere in the direction of the inlet 2, the second partition 5 made perforated spherical with the direction of the sphere in to the side of the outlet nozzle 3 and its base connected with the first partition 4, the fourth partition 7 is perforated with the perforation on the periphery and spherical with the sphere in the direction of the outlet nozzle 3, the central perforated pipe 13 is connected to the first central chamber 9 and placed in the second 10 and the third 11 central chambers, and the holes in the perforation of the pipe are located in the third central chamber 11. The spherical surfaces of the first 4 and fourth 7 transverse partitions are provided with a recessed E, directed towards the inlet 2 and outlet 3 nozzles, respectively.

The muffler works as follows. . ..

Exhaust gases from the engine through the inlet pipe 2 enter the inlet chamber 8, the flow around the spherical surface of the first transverse partition 4 through the perforations of its perforations located on the periphery.

Editor N. Margolin

Compiled by V.Slavnikov Tehred L.Oleinik

 3972/23. . Circulation 500. Subscription VNIIPI USSR State Committee

for inventions and discoveries 113033, Moscow, Zh-35, Raushsk nab., 4/5

Production polygraphic enterprise, Uzhgorod, Projecto st., 4

1245727

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the chamber 10. The spherical shape of the partition 4 reduces the aerodynamic resistance, providing effective damping of noise, and the convexity of the recesses of the partition 4 contribute to the reduction of the high-frequency components of the noise spectrum.

Next, the gas flow through the perforation holes of the second transverse bulkhead 5 enters the first central chamber 9 and through the central perforated tube 13, into the third central chamber 11. The gases in the second central chamber 10, meeting on their way a continuous third transverse partition 6, are reflected from It, having lost its energy, at the same time also interferential sound waves take place, which contributes to effective sound suppression. From the first 9 and second TO central chambers, the gas flows into the third central chamber 11 in two streams. A part of the gas is throttled through the perforations of the central tube 13, and the other part enters through its outlet opening and is reflected from the concave spherical section of the fourth transverse partition 7. versts of the perforation, the flow is divided into visually flowing jets, which leads to an effective reduction of the noise level by reducing the energy of sound vibrations in the process of splitting the gas flow into vortex formations and due to their interaction. The gas streams entering the third central chamber 11 are mixed and interact with each other, thereby making it possible to more fully use the flexibility of the gas in the chamber to quench the flow pulsations.

From the third central chamber 11, the exhaust gases through the perforations of the fourth transverse partition 7, located on its periphery, enter the exhaust chamber 12 and then through the exhaust pipe 3 to the atmosphere.

Proofreader E.Sirokman

Claims (2)

(1. INTERNAL COMBUSTION ENGINE EXHAUST NOISE SILENCER, comprising a housing with inlet and outlet pipes, first and second transverse walls forming an inlet and first central chambers, a central perforated pipe mounted coaxially to the body, and an exhaust chamber, especially that, in order to increase efficiency, it additionally contains the third and fourth transverse partitions forming the second and third central chambers, the first partition is perforated with the location of the perforation on the periphery and spherical with the direction of the sphere toward the inlet pipe, the second partition 'is perforated and spherical with the direction of the sphere towards the exhaust pipe and is conjugated with its base to the first partition, the fourth partition is perforated with the perforation at the periphery and spherical with the direction of the sphere to the side the outlet pipe, the Central perforated pipe is connected to the first Central chamber and placed in the second and third Central chambers, and the hole Pipe perforations are located in the third central chamber. 2. A silencer according to claim 1, characterized in that the spherical surfaces of the first and fourth transverse partitions are provided with recesses directed towards the inlet and outlet pipes, respectively.