SU1174571A2 - Noise silencer - Google Patents

Abstract

NOISE SILENT on avt.St. No. 1116194, characterized in that, in order to increase the efficiency of sound attenuation, the axis of the rotating screen makes an angle of 5-30 with the axis of the mixing chamber, with the apex of the latter coinciding with the center of the torus of the vapor-gas flow turning section.

Description

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  The invention relates to mechanical engineering, in particular engine building, and can be used to reduce the level of noise produced by exhaust gases, to smooth out pulsations of gas flows and also to partially neutralize exhaust gases, and is an improvement of the device according to the main auth. No. 111619. The purpose of the invention is to increase the efficiency of sound attenuation. FIG. 1 shows a silencer in a coaxial position of a rotating screen at an inclination angle of / 3 0, a longitudinal section; FIG. 2 is a section A-A in FIG. G, FIG. 3 - a silencer with a tilted rotating screen, a longitudinal section. The device comprises a vortex chamber 1 with a tangential gas inlet 2 of gas associated with a mixing chamber 3, made of a cylindrical shape with a wall of porous material and equipped with a cylindrical casing 4 with a tanga. Liquid supply nozzle 5 coaxially with a gap around the mixing chamber 3 and provided with a tangential outlet pipe 7, a guiding deflector 8 located coaxially with a gap relative to the cylindrical housing 4, and a portion 9 of rotation of the combined-vapor flow toroidal shape formed by the end face of the cylindrical casing 4 and the screen 10. The pipe 11 of the liquid outlet is located in the lower part of the chamber 6 release. The screen 10 is provided with an axial protrusion 12 mounted in the bearing 13 on the stationary radial ribs 14 mounted on a spherical annular surface 15, the outer radius R of which is equal to the inner radius of the inner spherical surface 16 of the lower part of the release chamber 6. The beginning of the radius R is on the axis of the mixing chamber 3 in the center of the torus of the section 9 of the rotation of the vapor-gas flow of a toroidal shape. . In the pipe 11 of the liquid outlet, the guide cheeks 17 are installed in the form of a part of a flat ring with radii from the center of the torus of the section 9 of the rotation of the combined-cycle toroidal flow t Between the guide cheeks 17 there passes a screw 18 attached to radial ribs 14, which were pulled by a washer 19 and nut 20 to the ends of the guide jaws 17. The fastening of the fastening of the screen 10 allows it to be set at an angle to the axis of the mixing chamber 3 when the center of the torus of the section 9 of the rotation of the vapor-gas flow is toroidal on the axis of the mixing chamber s 3. The silencer, noise works as follows. The exhaust gas flow from the internal combustion engine through the tangential gas inlet nozzle 2 is fed into the vortex chamber 1, where it swirls and rotates continuously in the near-wall region, into the mixing chamber 3, where it mixes with the liquid through the porous wall that forms a finely dispersed structure an effective medium for noise suppression and soot deposition (adhesion on droplets of a liquid). Part of the liquid in the form of droplets before exiting the mixing chamber 3 under the action of centrifugal forces of the rotating gas-vapor flow collects in the wall region of the mixing chamber 3, forming a liquid cone, which contributes to an increase in the angular velocity of the rotating gas-vapor flow in the output section of the mixing chamber 3. At a rotating gas-vapor flow with the inclined surface of the rotating screen 10, the rotational axis of the vortex tube of the rotating vapor-gas flow deviates from the vertical position due to the formation of separation zones and the attachment of a vapor – gas vortex on the surface of the inclined rotating screen 10 of the toroidal shape. In this case, the rotating vapor-gas flow in the section 9 of the rotation of the vapor-gas flow of a toroidal shape begins to generate oscillations that destroy the film of the flowing liquid from the mixing chamber. Gas oscillations lead to the formation in the lower part of chamber 6 of the release of an additional volume filled with a finely dispersed liquid structure, which is an effective medium for sound suppression and sedimentation of rage.

The liquid drops in the lower part of the outlet chamber 6 under the action of centrifugal forces of the rotating flow are thrown onto the walls of the outlet chamber 6, through which they flow down towards the nozzle 11, where the rotation of the fluid is limited by the radial ribs 14.

The soot-cleaned rotating gas stream is led through a channel formed by the outer wall of the cylindrical casing 4 and the wall of the deflector guide 8 to the upper part of the outlet 6, from where the gas leaves.

Phage7

gives the device through the pipe .7 tangential gas outlet.

Thus, the implementation of the present invention allows to increase the efficiency of sound attenuation due to the activation of dispersed liquid in the lower part of the discharge chamber.

In addition, the back pressure of the silencer is partially reduced by eliminating the liquid curtain in the area between the end of the mixing chamber and the surface of the rotating screen.

1Kitality

Claims (1)

NOISE MUFFLER No. 1116194, characterized in that, in order to increase the efficiency of sound attenuation, the axis of the rotating screen makes an angle of 5-30 with the axis of the mixing chamber, and the top of the latter coincides with the center of the torus of the section of rotation of the gas-vapor stream.