SU1557343A1 - Muffler - Google Patents

Abstract

The invention relates to engine-building and makes it possible to increase the efficiency of sound attenuation by mixing direct and reflected flows. The silencer comprises a housing 1 with an inlet 2 and an outlet 3 apertures and transverse partitions 4 partially overlapping the flow area of the housing 1, alternately installed on opposite sides, and forming groups with the same distance between them, the number of partitions 4 and the distance between them in groups increases, and the distance between adjacent partitions of 4 different groups decreases towards the outlet 3. The exhaust gases through the inlet 2 enter into the cavity of the housing 1, where, moving forward The birintine channel is reflected from the transverse partitions 4 and is mixed with the main flow, which leads to the quenching of the energy of the gases. The exhaust gases are released into the environment through the exhaust port 3. 4 Cp. f-ly, 2 ill.

Description

FIG. 2

FIELD OF THE INVENTION The invention relates to mechanical engineering, in particular engine building, namely, exhaust emission silencing engines for internal combustion engines.

The purpose of the invention is to increase the efficiency of sound attenuation.

FIG. 1 shows the silencer, end view; in fig. 2 shows section A-A in FIG. one.

The silencer comprises a housing 1 with an inlet 2 and an exhaust 3 apertures and transverse partitions 4 partially overlapping the flow area of the housing 1, installed alternately on opposite sides and forming groups with the same distance between them, and the number of partitions 4 and the distance between it increases in groups, and the distance between adjacent partitions of 4 different groups decreases towards the outlet 3.

The partitions 4 can form at least three groups, each of which can have 4-10 partitions 4. The distance between the partitions 4 in the groups can vary from 0.1-1.3 to 1.5-1.8 of the inner diameter of the housing. 1, and the distance between adjacent partitions of 4 different groups can vary from 6.0-7.0 to 4.0-5.0 of the inner diameter of the housing 1.

The recommended overlap of the transient 1 flow area of housing 1 is 54–58%, and in order to avoid accumulation of combustion products in the housing 1, it is recommended to cut the partitions vertically,

In the manufacture of the puma silencer, the installation of partitions 4 is recommended by sawing the body 1 from opposite sides, then inserting the partitions 4 and scalding them from the outside to ensure sealing of the connections.

When implementing a noise muffler in

as an option it is possible to use

Call for pipe 1 pipe with a diameter of 44 mm and a wall thickness of 1.5 mm. The thickness of the partitions 4 can be 1.0 mm when the partition width of the radius of the housing 1 is exceeded by 1-2 mm. The distance between partitions 4 in the first group is 49 mm, in the second group 57 mm, in the third group 69 mm, the number of partitions with

with about

five

0

responsibly 4, 6, 10, i.e. total 20. The distance between adjacent partitions 4 of the first and second groups is 265 mm, and between the second and third groups is 180 mm.

The muffler works as follows.

Claims (6)

The exhaust gases through the inlet 2 enter the cavity of the housing 1, where, moving along the labyrinth channel, they are reflected from the transverse partitions 4 and mixed with the main flow, which leads to the quenching of the energy of the gases. The design of the silencer allows uniform noise damping along the length, i.e. in each part of the silencer, the energy losses are approximately the same and this is achieved (with three groups of partitions 4) in that in the initial part of the housing 1 the third part of the flow energy is quenched along the shorter length with the minimum number of partitions 4 and the distance between them. With the fall of the energy of the flow at the exit from the group of partitions 4, a smaller way is needed to restore the uniformity of the flow in the direction of movement of its particles along the axis of the housing 1 in the area between adjacent partitions 4 of different groups, and more partitions 4 spaced apart . The exhaust gases are released into the environment through the exhaust port 3. The claims. 1. A noise suppressor, comprising a housing with inlet and outlet openings and transverse partitions partially overlapping the flow area of the housing, alternately installed on opposite sides and forming groups with the same distance between them, characterized in that, in order to increase the sound attenuation, the partitions and the distance between them in groups increases, and the distance between adjacent partitions of different groups decreases towards the outlet. 2. A silencer according to claim 2, characterized in that the partitions form at least three groups. 3. Silencer on PP. 1 and 2, that is, in that each group has 4-10 partitions. 4. Silencer on PP. 1-3, about the fact that the group has 4-10 partitions. 5. Silencer on PP. 1-3, characterized in that the distances meadu partitions in groups I change are from 0.1-1.3 to 1.5-1.8 of the inner diameter of the housing. 6. The silencer on PP. 1-4, characterized in that the distances between adjacent partitions of different groups vary from 6.0-7.0 to 4.0-5.0 of the internal diameter of the housing. Fig1