SU1442679A1 - I.c. engine exhaust muffler - Google Patents

Abstract

The invention relates to engine construction and makes it possible to increase the efficiency of noise suppression by reducing the gas-dynamic resistance. The annular screen (CE) 7 is installed between the end wall 3 of the cylindrical body 1, partially placed in the casing 6, and the output slice (BC) of the inlet pipe (P) 4, mounted on the end wall 2 and partially placed in the case. The bypass tube 8 is installed in the QE opening, its entrance section is partially located inside P 4, and the distance of its sun to the opposite wall 3 is no more than 0.5 of its diameter. In the area of the casing, the housing is perforated, and the holes 9 of the perforations are made in the first and second zones. The length of the first zone, limited by the wall 3 and the plane passing through the air tube, and the second zone, limited by the CE and the plane passing through sun P 4, depends on the annular gap formed by P 4 and the tube. With this arrangement, the exhaust gas flow is divided into two and directed to the first and second zones, which reduces the pressure losses at the turn of the flow at the wall 3 and the FE and allows reducing the dimensions of these zones. Exhaust P 5 is installed on the side of the casing. 1 il. M S (L

Description

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The invention relates to mechanical engineering, in particular to engine-building, namely, to silencers for the production noise of an internal combustion engine.

The aim of the invention is to increase the efficiency of the silencer by reducing the gas-dynamic resistance.

The drawing shows a silencer, a longitudinal section.

The exhaust silencer of an internal combustion engine comprises a cylindrical body 1 with end walls 2 and 3 and an inlet 4 and an exhaust 5 nozzle, the housing 1 being partially enclosed in the housing 6, and in the last zone is perforated, the inlet 4 is mounted on the end wall 2 of the housing 1 and partially placed in the latter, and the outlet 5 is installed on the side surface of the casing 6. The silencer is equipped with an annular screen 7 installed between the end wall 3 of the housing 1 and the outlet cut of the inlet 4, in the hole annular About the screen 7, an overflow tube 8 is installed, the inlet portion of which is partially located inside the inlet 4, and the distance of its output slice to the opposite end wall 3 of the housing 1 is no more than 0.5 of its diameter d, and the holes 9 of the perforation of the housing 1 are made the first zone length / g, limited by the end wall 3 and the plane II passing through the outlet cut of the overflow tube 8, and in the second zone limited by the annular screen 7 and plane II-II passing through the exit cut of the inlet 4 and defined byformula / g

 f, where / is the area of the annular gap,

formed by the inlet pipe 4 and the overflow pipe 8, and - is constant.

The muffler works as follows.

When the engine is running, the exhaust gases through the inlet pipe 4 enter the housing 1. Part of the gas flow through the overflow pipe 8 enters the gap between the outlet section of the pipe 8 and the end wall 3, and the other part of the flow through the annular gap formed by the pipe 4 and partially located in it tube 8, falls into the gap between the output cut

the pipe 4 and the screen 7. At the end wall 3 and the screen 7, the gas flows rotate and, moving straight through the perforations 9 of the housing 1, enter the outlet chamber formed by the housing 6 and the housing surface part enclosed in the housing nozzle 5 is released into the environment. As a result of dividing the exhaust gas flow into two head losses for turning flow

the end wall and the screen 7 are reduced, which allows to reduce the size of the gaps between the output sections of the pipe 4 and. tube 8 and, respectively, the screen 7 and the end wall 3.

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Claims (1)

Invention Formula An exhaust silencer for internal combustion engines containing a cylindrical body with end walls and the inlet and outlet nozzles, the body partly placed in the casing and in the area of the latter is perforated, the inlet nozzle is installed on the end wall of the body and partially placed in the latter, and the outlet nozzle is installed on the side surface of the case, characterized in that by reducing the gas-dynamic resistance, it is provided with an annular screen installed between the end wall of the housing and the outlet cut of the inlet pipe, an overflow is installed in the opening of the annular screen and the tube, the inlet portion of which is partially located inside the inlet nozzle, and the distance of its exit slice to the opposite end wall of the housing is no more than 0.5 of its diameter, with the holes in the housing perforations made in the first zone of length A, limited by the end wall and plane, passing through the outlet cut of the overflow tube, and in the second zone, limited an annular screen and a plane passing through the outlet cut of the inlet pipe and defined by the formula, where  - the area of the annular gap formed by the inlet pipe and the overflow pipe, al - constant.