CN2088167U

CN2088167U - Airstream muffler

Info

Publication number: CN2088167U
Application number: CN 91204059
Authority: CN
Inventors: 潘光明
Original assignee: SHIPYARD OF XIN'ANJIANG DEVL CO CHUN'AN COUNTY
Current assignee: SHIPYARD OF XIN'ANJIANG DEVL CO CHUN'AN COUNTY
Priority date: 1991-03-16
Filing date: 1991-03-16
Publication date: 1991-11-06

Abstract

The utility model relates to a muffler which is characterized in the method of sound attenuation. Anti type structure is used in the existing mufflers, namely, the sound attenuation is realized by preventing the flow of air-stream and reducing the velocity of flow of the air-stream, but the effect of sound attenuation is not ideal. An inner tube is connected to the center of the shaft of a muffler cylinder; a baffle plate with a plurality of holes is arranged between the inner tube and the muffler cylinder to form two chambers; the front chamber is big; the back chamber is small; sound-absorbing material is arranged in the small chamber; the tube wall of the inner tube is provided with a plurality of small air holes. The utility model has the advantages of impedance bond, simple structure, good effect of sound attenuation, low oil consumption, etc.

Description

Airstream muffler

The utility model relates to the sound reduction method is the silencer of characteristics, particularly adopts anti-formula of dividing plate and sound absorbing material to make up a kind of silencer that reduces exhaust energy.

At present, the kind of silencer is more, respectively be applicable to different occasions, wherein more common has following two kinds, a kind of is the anti-formula baffler of dividing plate, its structure is the dividing plate that is provided with several band mesh in the noise reduction socket, and the import and export Guan Jun that connects socket stretches in socket, and its mouth of pipe is shut, and offer some distribution apertures on the peripheral wall, air-flow is all hindered at several places like this, and airspeed is forced to reduce, to reach the noise reduction purpose, but this structure mainly relies on several roads internal partition, do not resolve the slow diffusion of air-flow, so sound deadening capacity is less as a result for it, effect is undesirable.Second kind is the box-like baffler of plate and duct ligation, its structure is to be provided with two with upper clapboard in the noise reduction socket, be connected with some little interior pipes between the dividing plate, offer spilehole on the pipe peripheral wall in little, air-flow mainly is to flow in the pipe in little, the same the same, air-flow is subjected to artificial obstruction, and force it to change its course, reduce air-flow velocity,, do not note slowly the mode of air-flow and the oil consumption problem of main frame combine because the mode of its slow air-flow is stronger, so that the main frame oil consumption is bigger, and sound deadening capacity is not obvious.

In order to solve the problem of above-mentioned existence, the utility model provides anti-formula of a kind of dividing plate and sound-absorbing material in conjunction with the air-flow silencer that reduces exhaust energy.

The utility model is to realize above-mentioned purpose by following technical proposals, pipe in one of socket axle center cross-under, dividing plate with a band porous is arranged between interior pipe and the socket, its position is near tail end, form pre-large post-small two cavity volumes, in the cavity volume of back, be filled with sound absorbing material, and on this section inner pipe wall, offer some spileholes, also offer one section spilehole on preceding cavity volume inner pipe wall, two cavity volumes are connected with interior tube space before and after making.

The utility model also can also be provided with the dividing plate of a band porous in above-mentioned preceding cavity volume, be filled with sound absorbing material in the anterior cavity volume of this dividing plate, and aforesaid spilehole is positioned at anterior cavity volume to be had on this section of sound absorbing material.In the pipe, its center was a vent less than diameter of inner pipe in the utility model also can extend to dividing plate.

Description of drawings is as follows:

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is the structural representation that has two dividing plates.

Fig. 3 is the structural representation that has the resistance dividing plate.

Below will the utility model is further introduced by accompanying drawing, referring to Fig. 1, the interior pipe 2 that one two end of axle center cross-under of socket 1 all exposes, the two ends of socket 1 all have end cap 3 to be connected with the tube wall of interior pipe 2, one end of interior pipe 2 is fixed with adpting flange 4, dividing plate 5 with a band porous is arranged between interior pipe 2 and the socket 1, form pre-large post-small two

cavity volumes

6,7, it is the position deflection afterbody of dividing plate 5, the sound absorbing material 8 that is made of glass wool is set in rear portion cavity volume 7, in this section, offer some spileholes 9 on pipe 2 tube walls, offer one section spilehole 10 too, two cavity volumes 6 before and after making on forwardly interior pipe 2 tube walls, 7 are communicated with the inner chamber of interior pipe 2.In the using process, exhaust airstream is by managing 2 o'clock in unimpeded, because inner pipe wall is distributed with spilehole, and be diffused into naturally in the cavity volume 6, make the slow air-flow brunt of air-flow of nature diffusion then by dividing plate, in the inner chamber 7 sound absorbing material is arranged simultaneously, possess sound absorption function is arranged, thereby both are in conjunction with the noise that can reduce exhaust airstream greatly.Referring to Fig. 2, the dividing plate 11 of one band porous is set in the cavity volume 6 before described in the above again, also is filled with sound absorbing material 12 in the front portion of dividing plate 11, the spilehole 10 on the inner pipe wall is distributed in the leading portion of dividing plate 11, sound-absorbing effect can be more obvious like this, increases the effect of noise reduction.Referring to Fig. 3, on the described in the above basis, dividing

plate

5 or 5,11 is extended in the interior pipe 2, make and wherein be formed centrally a vent 13 less than interior pipe 2 diameters, when exhaust airstream passes through, play throttling action to reduce the flow velocity of exhaust airstream.Thereby further improve the effect of noise reduction.

The utility model compared with prior art, simple in structure, excellent noise reduction effect, oil consumption are low, through relevant department's test, noise reduction can reach 34 gradation (A), the oil consumption loss late be 2.44 grams/kilowatt-hour.

Claims

1, a kind of silencer for gas flow of forming by noise elimination socket and adpting flange, it is characterized in that managing 2 in one of 1 center cross-under of described socket, be arranged between interior pipe 2 and the socket 1 with a dividing plate 3 with holes, its position is near tail end, form pre-large post-small two cavity volumes 6,7, in the cavity volume 7 of back, be filled with sound absorbing material 8, and on this section inner tubal wall, offer some spileholes 9, on preceding cavity volume 6 inner pipe walls, also offer one section spilehole 10.

2, silencer for gas flow as claimed in claim 1, it is characterized in that also being provided with a dividing plate with holes 11 in the described preceding cavity volume 6, be filled with sound absorbing material 12 in the anterior cavity volume of this dividing plate, the position of above-mentioned spilehole 10 is positioned at anterior cavity volume to be had on sound absorbing material 12 these sections.

3, silencer for gas flow as claimed in claim 2 is characterized in that described dividing plate extends in the interior pipe 2, and the center is a vent 13 less than diameter of inner pipe.