SU1250658A2 - Exhaust silencer - Google Patents

Description

one

The invention relates to mechanical engineering, in particular, engine-building, namely, to silencers of the noise of exhaust pipes of engines of internal combustion, and is an improvement on the presentation of the ed. CB..VO 393466.

The aim of the invention is to guide: the efficiency of the glutinous.

On fng. 1, a silencer is installed, a radial cut; in fig. 2 is a section .A —A of FIG. one; in fig. 3 - an element of alternation of metal and glass cloth grids in a sound-absorbing insert; pas figs. 4 - diffuser with .un restraint m.

Silench.; S contains the housing 1 and the cylindrical sound-absorbing insert 2 located in it with a central channel for the passage of gas. Acoustic iKTiiiiKa 2 1 and 111 are filled with alternating cylindrical c. 1 metal 3 and .kmKaiK itoii 4 ssgok, living section section c. y to with. wk) i 11, fraction from IUMIT- (h; to the periphery for me 1a.1lischki, rc ik .i: nmichi1) aots, and for glass; ixiUK iii.ix. tk-gok is spliced. ii ii4t M at the inlet. And p, IN ;: a dial for the iroh of the flow of water is set to di (| and (. (op G), and on the outlet of the outlet nipple i. at 1 entrance 1 to the diffuser G, there are metal plates 7 forming the blade swirl, plates 7 are installed under 45-50 to the longitudinal axis of the housing 1 at a diffuser angle of 5-30

In the central channel of the sound-absorbing insert 2, a large meta cell is installed. A mesh 8, on the outer surface of which a finely meshed metal filter mesh 9 is installed.

The metallic fi-lattice grid 9 can be installed only in the region adjacent to the swirler and in the end part of the screw-in insert 2.

1250658

Silencer way.

N1uma works as follows

S

0

five

The engine exhaust enters the diffuser B, twists in a swirler, passes along the sound-absorbing insert 2 through its channel and is emitted into the atmosphere through the nozzle 6. During the movement, the exhaust gases wash the large surface of the sound-absorbing insert 2 and fill the resonant chambers formed by layers of metal 3 and 4 glass cloth nets. Waves of acoustic oscillations and pulsation of exhaust gases, the passage through the sound channel of insert 2, vibrate the gas in the resonant chamber. Due to the high resistance of friction in the cells of the glass-drop nets, the oscillation gas loses most of the energy of acoustic oscillations, 410 leading to an intense noise reduction on В1,1 entrance from the silencer. At the same time, the main gas flow freely passes through the insert channel and flows through the outlet nozzle to the atmosphere. The swirling device installed at the entrance to the damper compresses the gas, forcing its particles to move along the screws of the lines, ensured (and the required path length for a given length of the sound-absorbing insert 2, and the length of the insert depends on the angle T) - it is helix trajectory of gas particles. Exprimept, it has not been established that the optima.: | Yn yy. The iOM of the gclastin 7 installation is an angle of 45 at an angle of 5 ° to 30 ° for the diffuser. At the same time, centrifugal si- .1Ы produce senaratsnk) i aza, separating l to the periphery of the flow 1m and collecting in the center of the channel the sound () 1Lo1 of the insert 2 b, whose cold gas, In the center of the channel mainly soot is collected, then thrown out.

AT

FIG. 2

(pu

w

w

srig

Claims (3)

1. SILENCER OF EXHAUST GAS NOISE by ed. St. No. 393466, characterized in that, in order to increase the efficiency, metal plates forming a blade swirl are installed in the inlet diffuser, the plates being installed at an angle of 45-50 ° to the longitudinal axis of the casing at an opening angle of the diffuser of 30 °. 2. Silencer according to π. 1. characterized in that in the Central channel of the sound-absorbing insert is installed coarse metal mesh. 3. The muffler according to paragraphs. 1 and 2, characterized in that on the outer surface of the coarse-mesh metal mesh, a fine-mesh filter mesh is installed. 125065 "