SU1389737A1 - Muffler - Google Patents

Abstract

The invention relates to mechanical engineering and makes it possible to increase the efficiency of sound attenuation. In case 1, there are at least two annular partitions 4 and 5, connected by a central nozzle 6, and a cone divider 7. The latter is installed coaxially with the inlet nozzle 2, and the partition 4 adjacent to it is perforated. The divider 7 is matched with its base with a partition 4. The holes 8, 9 of the perforations of the latter are located respectively in the zone of the base of the dissector and outside of it. The divider, pipe 6 and partitions 4, 5 form expansion and resonant chambers 10-16. The exhaust gas flow enters the chamber 10, and then through the openings 9 to the chamber 11 and then through the openings 8 to the chamber 12. In the chambers 10-12, due to expansion, the flow velocity decreases. 1 il. with $

Description

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The invention relates to mechanical engineering, in particular, an engine-engine, namely, to mufflers of noise, mainly an internal combustion engine.

The goal of the reading is to increase the effectiveness of gum suppression.

The drawing shows a silencer, a longitudinal section.

The silencer comprises a housing 1 with an inlet 2 and an outlet 3 with nozzles and at least two annular partitions 4 and 5 connected by a central nozzle 6, and a cone-shaped divider 7, the latter being coaxial with the inlet nozzle 2 and adjacent to it. 4 is perforated. The cone divider 7 is conjugated by its base with a perforated transverse partition 4, with the holes 8 and. 9, the perforations of the latter are located respectively in the area of the base of the dissector 7 and the upper part thereof. The divider 7, the pipe 6 and the bulkheads 4 and 5 form expansion and resonant chambers 10-16.

The recommended ratios of the geometric dimensions of the silencer are as follows: the ratio of the diameter of the housing 1 to the diameter of the pipes 2, 3 and 6 is in the range of 2.5-3; о. The ratio of the length of the housing 1 (without pipes 2 and 3) to its diameter is approximately 2.0; the ratio of the total area of the holes 8 and 9 of the perforation of the partition 4 to the area of the flow area of the pipes 2, 3 and 6 is approximately 1, 2,

The muffler works as follows. ,

When the engine is operating, the exhaust gas flow through the inlet pipe 2 enters the chamber 10, and aathem through the openings 9 of the outer perforation of the partition 4 - into the chamber.11 and further through the openings 8 of the internal perforation of the partition 4 - into the chamber 12. In the chambers 10-12 due to expansion occurs reducing the flow rate of gases.

The process is then repeated, and then the exhaust gases are emitted into the atmosphere through the outlet 3. Thus, the expansion of a gas, a decrease in its velocity, including due to a multiple change in the direction of motion, reduces the noise level.

Claims (1)

Invention Formula Silencer P1uma, mainly for an internal combustion engine, comprising a housing with inlet and outlet manifolds, at least two annular transverse partitions connected via a central manifold and forming a resonant chamber, and a cone divider mounted coaxially with the inlet side of the inlet manifold, with the partition adjacent to with a divider, made perforated, about the tol and - due to the fact that, in order to improve the efficiency of sound attenuation, the cone divider is base conjugated with perforated oh transverse partition, and the perforation holes of the latter are located in the area of the base. vani rassekatel and outside of it. Editor V. Bugrenkova Compiled by V.Slavnikov Tehred M. Khodanych Order 1613/3 Circulation 492 VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Proofreader A.Zimokosov Subscription