CN2380690Y

CN2380690Y - Silencer

Info

Publication number: CN2380690Y
Application number: CN 99221789
Authority: CN
Inventors: 王浩国; 王志明
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-07-30
Filing date: 1999-07-30
Publication date: 2000-05-31
Anticipated expiration: 2009-07-30

Abstract

The utility model relates to a silencer which is suitable for internal combustion engines. The utility model comprises a housing, an air inlet hole pipe, an inner expansion cavity, a silencing hole pipe, a baffle plate and an exhaust tail pipe; the silencing hole pipe is conical, the baffle plate divides the inner expansion cavity into three cavities, and the conical silencing hole pipe penetrates through a second cavity and communicates a first cavity and a third cavity. The utility model has the advantages of simple structure, little flow resistance and strong noise eliminating ability.

Description

A kind of silencing apparatus

The utility model belongs to a kind of silencer, particularly a kind of silencing apparatus that is applicable to internal-combustion engine.

The silencing apparatus that uses on internal-combustion engine at present generally is made up of housing, interior expansion chamber, sound attenuation hole pipe, dividing plate, tailpipe.Engine exhaust gas this silencing apparatus of flowing through, portion expands within it, and utilizes various not isometric minute chambeies that sound waves of different frequencies is interfered, thereby reaches the purpose of noise elimination.And existing silencing apparatus all adopts straight sound attenuation hole pipe or perforation dividing plate to eliminate the noise, so be difficult to reach the requirement of not choked flow of eliminating the noise under more situation.

The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art, and a kind of noise elimination potentiality that can give full play to each chamber are provided, and reduces the model muffler of choked flow effect.

The utility model is realized in the following manner:

A kind of silencing apparatus comprises housing, interior expansion chamber, sound attenuation hole pipe, dividing plate, tailpipe, has two dividing plates that interior expansion chamber is cut off into first chamber, second chamber, the 3rd chamber successively, totally three chambeies; Described sound attenuation hole pipe is taper, and taper sound attenuation hole pipe passes second chamber, connects first chamber and the 3rd chamber.

The waste gas that internal-combustion engine is discharged enters first chamber in the housing through the inlet hole pipe, fully expand after taper sound attenuation hole pipe enters the 3rd chamber, resonance effect is only played in through hole and second chamber of taper sound attenuation hole pipe in second chamber, utilize this resonance effect further some frequency of sound wave in the taper sound attenuation hole pipe to be played interference effect, air-flow further expands in the 3rd chamber, and the noise that reduces some frequency sound wave is after the tailpipe discharge.

The utility model has been owing to implemented second chamber of taper sound attenuation hole pipe and sealing, thereby it is little to have a circulating resistance, and it is strong to eliminate the noise ability, does not produce the advantage of regenerated noise.

Description of drawings:

Fig. 1 is a structural representation of the present utility model.1 is housing among the figure, and 2 is the inlet hole pipe, and 3 is the sound attenuation hole pipe, and 4 is dividing plate, and 5 is interior expansion chamber, and 6 is tailpipe.

Below in conjunction with accompanying drawing the utility model is described in further detail:

Housing 1 can be cylindrical body, also can be other geometrical shape, its sectional area according to the discharge capacity of supporting internal-combustion engine and rotating speed determine, on housing 1, be provided with inlet hole pipe 2, enclosed baffle 4, tailpipe 6, taper sound attenuation hole pipe 3 is connected on the dividing plate 4.

Engine exhaust gas enters first expansion chamber through inlet hole pipe 2, reduce the noise of some frequency, then through taper sound attenuation hole pipe 3, enter the 3rd chamber by second chamber, airless flows in second chamber, but because the sound wave of some frequency is interfered in the effect meeting of taper sound attenuation hole pipe 3 through holes under resonance, further expand and reduce noise, discharge through tailpipe 6 again.Whole process can effectively reduce the noise of the different frequency range of 0～8000 hertz of frequency of sound wave, thereby reaches the purpose of noise elimination.

But inlet hole pipe of the present utility model, tailpipe also lateral arrangement are not limited in scheme shown in Fig. 1 in the housing upper and lower end.

Claims

1. a silencing apparatus comprises housing [1], inlet hole pipe [2], interior expansion chamber [5], sound attenuation hole pipe [3], dividing plate [4], tailpipe [6], two dividing plates [4] cut off into interior expansion chamber [5] on three chambeies, be followed successively by first chamber, second chamber, the 3rd chamber, of the present utility model being characterised in that: described sound attenuation hole pipe [3] is taper, and taper sound attenuation hole pipe [3] passes second chamber and connects first chamber and the 3rd chamber.