SU1134744A1 - Gas flow noise silencer - Google Patents

Abstract

A gas flow noise silencer, predominantly the flow of the rotated gases of an internal combustion engine, comprising a cylindrical body divided by transverse barriers into an inlet-splitter, a central and a mixing chamber, an inlet and outlet nozzle, a swirler installed between the central and mixing chambers, the partition between the inlet-splitter and - central chambers with channels located in its walls, the length of which increases with distance from the axis of the body, and the central tube, a connecting inlet chamber with a mixing chamber and provided with a perforated portion located in the inlet chamber, characterized in that. In order to increase the efficiency of sound attenuation, an additional swirler is installed in the inlet chamber and both swirlers are made in the form of a disk with peripheral and internal rows of through inclined otrests, with the axes of peripheral and internal radii inclined in different directions, the axes of the holes of the internal row of additional swirler located on the conical. the surface expanding towards the mixing chamber, the axis of the holes of the peripheral row of both swirlers and the inside. there is a swirler row between the central one (L and the mixing chambers are located along a cylindrical surface, and between the mixing chamber and the outlet nozzle there is an additional partition with channels located in its walls, the length of which increases with distance from the housing axis, and the channels in both partitions made ring. With 4. 4

Description

The invention relates to a foreign engine, namely to noise suppressors. A well-known silencer for the gas flow, mainly the exhaust gas flow of an internal combustion engine, contains a cylindrical housing, section. transverse septa on the external separation chamber, the central and mixing chambers, the inlet and outlet connections, a swirler installed between the central and mixing chambers, the partition between the inlet-split and central chambers with channels located in its walls, the length of which increases as they move away from the axes of the corns, and the central tube connecting the inlet chamber with the mixing chamber and provided with a perforated section located in the inlet chamber 1. However, the well-known muffler has m low efficiency muting. The purpose of the invention is to increase the efficiency of sound attenuation. The goal is achieved by the fact that the lamella of the gas flow, predominantly the exhaust gas flow of an internal combustion engine, contains a cylindrical body divided by transverse barriers into the inlet-diffuser, central and mixing chambers, inlet and outlet nozzles, swirl, installed between centra ibHoi and with (you can use cameras, talk |) between the inlet-separating and central chambers with channels located in its CTeiiKcJX, the length of which is increased 1-: decreases but the distance from the axis to orpus, and the central pipe connecting r; acceleration chamber with a mixing chamber and equipped with a perforated section, located in the inlet chamber, in the last installation of the ayioB .ieif additional swirler and both g; The vortex is made in the form of a disk with a periphery1-; 1111 and internal rows of through inclined holes, with the axes of the holes of the peripheral and internal rows inclined in different directions, the axes (; the holes of the internal row of the additional swirler located on the conical surface extending towards the mixing chamber The 001 openings of the peripheral row of both swirlers and the internal row of swirlers between the central and mixing chambers are located along the central surface, and between the mixing chamber and the outlet pipe installed d) pol11itelpa partition with an atomizing .chozhennymm channels in its wall, whose length increases as the distance from the axis of the housing, wherein the channels in both partitions vpyulneny ring. FIG. 1 shows a longitudinal section of a dehumidifier; in fig. 2 - section A-A on. one; of figs. 3 shows a section BB in FIG. one; in fig. 4 shows a section B-B in FIG. one; in fig. 5 is a section of YYD in FIG. 2; in fig. 6 is a section d-d in FIG. 2; in fig. 7 shows section EE of FIG. four; in fig. 8 - section MF in FIG. 4. The Schuma silencer contains a cylindrical body 1 with inlet 2 and exhaust 3 nozzles. The housing 1 is divided into an inlet separation chamber 4, a central 5 and a mixing 6 chamber. A swirler 7 is installed between the central 5 and mixing 6 chambers, and a partition 8 with channels 9 is installed between the inlet separator 4 and the central 5 chambers. The voluntal chamber 4 and the mixing chamber 6 are communicated through a central pipe 10 fitted with a perforated portion 11 placed in an inlet chamber 4. An additional swirler 12 is installed in the vnusnoy chamber 4, and an additional partition 13 with channels 14 is placed between the mixing chamber 6 and the outlet outlet 3. The swirlers 7 and 12 are made in the form of a disk with a peripheral and internal row and through the inclined holes. The axes of the holes 15 of the inner row and the additional swirler 12 are located along a conical surface extending towards the mixing chamber 6. The axes of the holes 16 of the peripheral row of the swirler 12 and the axis of the holes 17 and 18 of the inner and peripheral rows, respectively, of the swirler 7 are located along a cylindrical surface. The axes of the openings 15 and 17 of the inner rows and the axes of the openings 16 and 18 of the peripheral rows of the swirlers 12 and 7 are inclined in different directions. The swirler 12 has a central opening 19, which is connected to the pipe 10. The channels 9 and 14, located in partitions 8 and 13, are annular and have a variable length that increases as you move away from the axis of the housing 1. In partitions 8 and 13, holes 19, the output is in channels 9 and 14. The muffler works as follows. The exhaust gases through the inlet pipe 2 enter the inlet-separation chamber 4 and are divided into two parts. The first part of the gas through the holes 19 swirl 12 enters the central tube 10. The other. The (main) part of the gas in two streams twisted in holes 15 and 16 in opposite directions enters the cavity beyond the swirler 12, where the flows are mixed, interference occurs. sound waves and reduced sound energy flow. Further, through the holes in the peripheral section 11, a part of the gas enters the central pipe 10, where it mixes with the gas coming from the inlet chamber 4 and the interference of sound waves. The main part of the gas passes through the channels 9 in the partition 8 and enters the central chamber 5. In the channels 9, the low-frequency sound waves are quenched due to the expansion of the gas as it leaves the holes 19 in the wide annular channels 9. From. The central chamber 5 passes through the openings 17 and 18 of the swirler 7, splits into two streams, twisted in opposite directions, and enters the mixing chamber b, where the streams are mixed and the interference of sound waves occurs. At the outlet of the central tube 10, a vacuum is created from the gas flow swirling in the swirler 7, which facilitates the free passage of gas from the tube 10 to the partition 13. The whole

the gas passes through the channels 14 of the partition 13, where there is an additional reduction of sound energy, and through the outlet nozzle 3 enters the atmosphere.

Thus, twisting the flows in the swirlers 7 and 12 in opposite directions, imposing gas flows at an angle in chamber 4 and parallel to each other in chamber 6, passing gas through annular channels of different lengths in partitions 8 and 13 greatly expands the range of muffled frequencies and increases the efficiency of noise suppression.

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Claims (1)

SILENCER OF GAS 'FLOW NOISE, mainly the stream of the exhaust gases of an internal combustion engine, comprising a cylindrical body divided by transverse baffles into an inlet-separation, central and mixing chamber, an inlet and outlet pipe, a swirler mounted between the central and mixing chambers, a partition between the inlet-separation central cameras with channels located in its walls, the length of which increases as the distance from the axis of the housing increases, and the central pipe, an inlet chamber with a mixing chamber and provided with a perforated section located in the inlet chamber, characterized in that, in order to increase the sound attenuation efficiency, an additional swirler is installed in the inlet chamber and both swirls are made in the form of a disk with peripheral and inner rows of through inclined cuts, and the axes holes of the peripheral and inner rye. the bores are tilted in different directions, the axes of the holes of the inner row of the additional swirler are located on a conical surface extending towards the mixing chamber, the axes of the holes of the peripheral row of both swirlers and the inner row of the swirler between the central and mixing chambers are on a cylindrical surface, and between the mixing chamber and the exhaust pipe an additional partition is installed with channels located in its walls, the length of which increases with distance from the axis of the housing, p By the way, the channels in both partitions are circular. .1134744) i34744