RU11834U1 - INTERNAL COMBUSTION ENGINE EXHAUST SILENCER - Google Patents

Abstract

1. A silencer of the exhaust exhaust of an internal combustion engine, comprising a housing, for example, in the form of a cylindrical pipe with perforated end walls between which sound-absorbing material is located, an intake and exhaust pipe, characterized in that expanded clay is used as sound-absorbing material. 2. Silencer according to claim 1, characterized in that the perforations in the end walls do not exceed the size of the minimum cross section of the expanded clay element. The muffler according to claim 1 or 2, characterized in that the end walls are made of mesh.

Description

  INTERNAL COMBUSTION ENGINE EXHAUST SILENCER

The utility model relates to the field of engine building, and specifically. to devices for damping the noise of the exhaust jet of an internal combustion engine and can be used both in the production of new engines and in the repair of internal combustion engines of any type.

Known silencer (see. A. S. USSR N 1346830, IPC F01N. 1/06, publ. 23.10.87, N39), comprising a housing with an inlet-I, h

and exhaust pipes and a sound attenuating element made in the form of cassettes of corrugated perforated plates. The plates forming the corrugations are arranged alternately and directed at an angle to one another. Exhaust gases enter the channels formed by the corrugations and are directed at an angle to each other in adjacent plates. In this case, the gas is divided into separate streams that interact with each other, resulting in a weakening of the noise level.

A noise suppressor is known which is the closest analogue (see A.S. USSR N 1745993, IPC F01N 1/06, publ. 07.07.92, N25,) containing a housing with coaxial inlet and outlet pipes, a hollow central body of alternating sections, the inner walls of the body are lined with sound-absorbing material, and the central body is filled with sound-absorbing material - foam rubber.

IPC FOIN 1/06 1/10

The design of this silencer is complex, high demands are placed on the quality of the sound-absorbing coating and its application. The increased aerodynamic drag of the muffler leads to a decrease in the engine operating parameters, for example, to a decrease in its power. In addition, the issue of reducing emissions of toxic substances into the atmosphere is not being addressed.

The technical result, which the proposed utility model is aimed at, is to increase the efficiency of sound attenuation, simplify the design of the muffler without reducing the engine operating parameters, and also to reduce the exhaust of toxic substances into the atmosphere. ,

The technical result is achieved by the fact that in the silencer of the exhaust exhaust of an internal combustion engine containing a housing, for example, in the form of a cylindrical pipe, coaxial inlet and outlet pipes, perforated partitions are installed inside the housing, between which there is a filler - expanded clay.

Perforation in end walls does not exceed size

minimum cross section of expanded clay element. Besides

Moreover, the end walls can be made of mesh.

Figure 1 shows a longitudinal section of a silencer of exhaust noise from an internal combustion engine.

The noise suppressor comprises a housing 1, in the form of a cylindrical nozzle, coaxial inlet 2 and exhaust 3 nozzles. Inside the case 1, perforated partitions 4 are installed, between which there is a filler - expanded clay 5. Perforations in

. ,

be made of mesh.

A silencer works as follows.

Exhaust gases at high speed enter the inlet pipe 2 and from it through the perforated baffle 4 into the housing 1 filled with expanded clay 5. Between the expanded clay elements 5 channels are formed through which the exhaust gas flow passes. These channels consist of diffuser-confuser sections along the gas jet formed by the surfaces of neighboring elements and act as resonance chambers. The confuser and diffuser channels reduce the scale of turbulence, which reduces the pulsation of the gas stream and, therefore, reduces the noise level. The exhaust gas stream is divided into many small streams, the sound waves of which are repeatedly reflected in the resonance chambers, the sound vibrations damp, which provides an almost complete internal reflection of sound in

. /,

channel volume.

In the proposed silencer, noise reduction is based not only on the absorption of sound wave energy by sound-absorbing material, but also on the effect of damping sound waves when they are repeatedly reflected from the walls of the resonance chambers.

Filler - expanded clay has sufficient porosity, air permeability and, therefore, does not create high aerodynamic drag, which does not affect the engine operating parameters. In addition, expanded clay serves as a filter, products of incomplete combustion of fuel are retained in it, which leads to a decrease in the release of toxic substances into the atmosphere.

/:

Thus, the proposed silencer of the exhaust noise of an internal combustion engine is structurally simple and cheap, since a cheap building material, expanded clay, is used as a filler. in atmosphere.

Claims (3)

1. The silencer of the exhaust exhaust of an internal combustion engine, comprising a housing, for example, in the form of a cylindrical pipe with perforated end walls between which sound-absorbing material is located, an inlet and outlet pipe, characterized in that expanded clay is used as sound-absorbing material.  2. The muffler according to claim 1, characterized in that the perforations in the end walls do not exceed the size of the minimum cross section of the expanded clay element. 3. The muffler according to claim 1 or 2, characterized in that the end walls are made of mesh.