SU1184960A1 - Exhaust silencer - Google Patents

Description

The invention relates to mechanical engineering, in particular dvigatelestro ·

, namely, the silencers

internal combustion engine.

The aim of the invention is to increase the efficiency of noise suppression while reducing exhaust emissions and fuel consumption per unit of internal combustion engine power.

FIG. 1 shows the proposed muffler, longitudinal section; in fig. 2 — node I in FIG. one; in fig. 3 - WCA A in FIG. 2; see 4B-B in FIG. 3 (inclination of the blades in the plane of the disk); in fig. 5 is a section through BB in FIG. one; in fig. 6 is a cross section of the FIG. one; see 7 shows the cross section dd in fig. one.

The silencer contains a cylindrical body 1 with an inlet 2 and an exhaust 3 with nozzles, divided by partitions 4 into resonant chambers 5-10, a conical swirl 11 with an outlet channel, perforated tubes 12 and 13, and partitions 4 are placed relative to body 1 with a gap and made in the form of disks with blades 14, inclined to the plane of the disk, and the perforated tubes 12 and 13 are installed concentrically with a gap one inside the other with the formation of annular chambers 15-17 and provided with a plug 18 on the side of the outlet nozzle 3, on which captured large base swirler outlet 11, conical surface 19 which is deployed towards vertices stub 18.

The muffler works as follows.

From the outlet nozzle 2, the exhaust gases flow into the perforated tube 12 and hit the plug 18, while in the tube 12 a reciprocating oscillation of gases with different amplitudes, including phase and direction, is formed, which causes the formation of interference. From the perforated tube 12, the gases, splitting into streams, enter the chambers 15-17, which contributes to the further discrete separation of gases in a wide frequency range. .

Through the perforated tubes 12 and 13, the gases enter the resonator chambers 5-10, twist the blades 14 inclined to the plane of the discs, receive movement in the axial direction and create a vacuum throughout the volume, which contributes to the enhanced extraction of gases through the perforated tube 13 and their further interference in resonator chambers 5-9. The throttle channel formed by the housing 1 and the partitions 4, provides for the formation of a ring of gases, the laminar flow of which contributes to the reduction of turbulence on the edges of the blades 14.

Next, the flow enters the resonator chamber 10, where without changing the rotational movement along the normal to the axis of the muffler, it is fed into the output channel of the swirler 11 attached to the plug 18 with a large channel base. In the output channel, gas smoothly twists along a conical helix with apex behind the channel, which ensures its outflow with increasing speed to the outlet, and therefore, a decrease in back pressure and temperature in the silencer, an enhanced effect of gas suction, compensation for total losses in the silencer.

1184960

Type A

FIG. 2

6- in

FIG. AT

Fy

1 184960

gd

Faye 7

Claims (2)

A DIN MUSTER, containing a cylindrical body with inlet and outlet connections, divided into resonator chambers by means of partitions installed on central perforated tubes, and a conical swirler with an output channel, characterized in that, in order to increase efficiency, the partitions are positioned relative to the housing with a gap and made in the form of disks with vanes inclined to the disk plane, and the perforated tubes are installed concentrically with a gap to one another to form annular chambers supplied from the side of the exhaust pipe with a plug, on which is fixed a large base of the output channel of the swirler, the conical surfaces of which are turned to the side of the plug. zi ,,., 1184960 Fi9.1 1184960 2