CN202544968U

CN202544968U - Super mute silencer

Info

Publication number: CN202544968U
Application number: CN201220155139XU
Authority: CN
Inventors: 高强
Original assignee: NINGBO YINZHOU GNS AUTO PARTS CO Ltd
Current assignee: NINGBO YINZHOU GNS AUTO PARTS CO Ltd
Priority date: 2012-04-11
Filing date: 2012-04-11
Publication date: 2012-11-21
Anticipated expiration: 2022-04-11

Abstract

The utility model provides a super mute silencer, belonging to the field of a silencing device. The super mute silencer solves the problem of poor silencing effect of the traditional silencing device. The super mute silencer comprises a hopper-shaped first silencing part and a hopper-shaped second silencing part, top parts of the first silencing part and the second silencing part face opposite directions and prop against each other, medial axises of the first silencing part and the second silencing part are aligned, the insides of the first silencing part and the second silencing part are hollow, and a plurality of small holes are distributed on conical faces of the first silencing part and the second silencing part. The super mute silencer comprises two hopper-shaped silencing parts of which the top faces prop against each other, the plurality of small holes are formed on the surface of each silencing part, and high-speed airflow can more smoothly pass through the small holes and then is subjected to speed reducing and absorbed. Compared with the traditional cylindrical silencer, the silencing effect of the super silent muffler can be improved by 50 to 70 percent.

Description

A kind of super-silent baffler

Technical field

The utility model relates to a kind of silencer, relates in particular to a kind of super-silent baffler.

Background technique

Baffler is meant what the principles such as absorption, reflection and interference according to sound were made, in order to reduce the noise of sound source radiation.Automobile is in the process of startup and high speed operation, and by discharge at a high speed, because outlet pipe is generally processed by the less cylindrical tube of bore, the waste gas that high speed flow is crossed is a large amount of noises of generation in the process of discharging through outlet pipe for waste gas.

For eliminating this kind noise; Existing baffler is many through on the outer wall of a hollow cylindrical tube, offering a plurality of apertures to form baffler; Like notification number is the disclosed Chinese patent of CN2392916Y; It passes through the evenly distributed aperture in the column-shaped barrel bottom, and suction ripple cotton is set to reach the effect of sound absorption at the column-shaped barrel outer surface.Yet the sound-absorbing effect of this kind baffler is also bad; Its main cause is; When air-flow during along the column-shaped barrel lateral transport, be opened in circular port on the column-shaped barrel can not make air-flow effectively radial propagation ripple is cotton to be absorbed so that gas is inhaled through this circular port, reach the effect of noise reduction.

Summary of the invention

The utility model technical problem to be solved is, to the above-mentioned deficiency of existing technology, proposes good, the simple in structure super-silent baffler of being convenient to mass production of a kind of sound absorption qualities.

The technological scheme that its technical problem that solves the utility model adopts is; A kind of super-silent baffler is proposed; Comprise funnelform first noise elimination part and second noise elimination part; Opposite and the two top of said first noise elimination part and the second noise elimination part top direction is replaced each other, and said first noise elimination part and the second noise elimination part medial axis overlap, said first noise elimination part and the second noise elimination part inner hollow and on the conical surface of first noise elimination part and second noise elimination part, be placed with a plurality of apertures.

Further, said aperture is circular aperture or polygonal aperture.

Further, the area of said each aperture is 1/300 to 1/150 of first noise elimination part or the second noise elimination part conical surface area.

Further, the conical bottom radius surface and the cone height of said first noise elimination part and second noise elimination part are identical.

Further, more said second noise elimination part of said first noise elimination part is more near airintake direction, and the said first noise elimination part conical bottom radius surface is less than the said second noise elimination part conical bottom radius surface.

Further, said super-silent baffler also comprises the noise reduction layer that is coated on said first noise elimination part and the second noise elimination part outer surface.

Further, said noise reduction layer is glass wool layer, slag wool layer, porous fiber layer or layer of polyester fiber.

The funnel form noise elimination part that the utility model baffler is replaced by two end faces each other constitutes; Each noise elimination part surface is formed with a plurality of apertures; High velocity air can be slowed down through those apertures and be absorbed more smoothly, compares traditional cylindric baffler, and its erasure effect can improve 50%-70%.

Description of drawings

Fig. 1 is the perspective view among super-silent baffler one embodiment of the utility model;

Fig. 2 is the sectional view of super-silent baffler shown in Figure 1 when using.

Embodiment

Below be the specific embodiment of the utility model and combine accompanying drawing, the technological scheme of the utility model is done further to describe, but the utility model is not limited to these embodiments.

Please with reference to Fig. 1, Fig. 1 is the perspective view of super-silent baffler among the utility model one embodiment, and along airintake direction, it comprises funnelform first noise elimination part 10 and funnelform second noise elimination part 20.First noise elimination part 10 and second noise elimination part, 20 tops are replaced towards opposite direction and the two top each other, and first noise elimination part 10 and second noise elimination part, 20 medial axis overlap.First noise elimination part 10 and second noise elimination part, 20 inner hollow all are placed with a plurality of apertures 30 on the conical surface of first noise elimination part 10 and second noise elimination part 20.

Aperture 30 shapes can be shapes such as circular aperture, polygonal aperture.In a preferred embodiment, the area of each aperture is 1/300 to 1/150 of first noise elimination part or the second noise elimination part conical surface area.

The conical bottom radius surface of first noise elimination part 10 and second noise elimination part 20 and cone height all can equate also can be unequal.Preferably, the conical bottom radius surface of first noise elimination part 10 and second noise elimination part 20 and cone height all equate.When the conical surface of first noise elimination part 10 and second noise elimination part 20 and cone height did not wait, along airintake direction, the conical bottom radius surface of first noise elimination part 10 was less than the conical bottom radius surface of second noise elimination part 20.

In the present embodiment, first noise elimination part 10 and second noise elimination part 20 are processed by stainless steel material, can prolong the working life of baffler, also are convenient to machine shaping simultaneously.Other first noise elimination part 10 and second noise elimination part 20 fixedly form through technologies such as welding after can being made of one piece and also can making respectively.

As shown in Figure 2, Fig. 2 is the cross-sectional schematic of super-silent baffler shown in Figure 1 when using.Among Fig. 2; Super-silent baffler is arranged at housing 1 inside; Super-silent baffler outer surface is coated by the noise reduction layer of being made by sound absorbing material 2, and first noise elimination part, 10 circular cone bottom surfaces and admission line 3 are tightly connected, and second noise elimination part, 20 circular cone bottom surfaces and outlet pipe 4 are tightly connected.Quieter material can be glass wool, slag wool, porous fibre, polyester fibre etc.

Among Fig. 2, direction shown in the arrow is the transmission direction of air-flow.After the high velocity air that is transmitted by admission line 3 transfers to first noise elimination part 10; Because first noise elimination part 10 is coniform; Portion gas gets in the noise reduction layers 2 via the aperture on the conical surface of first noise elimination part 10 30 and is slowed down by quieter material and absorb and reflected by housing 1 internal surface, and another part gas transfers in second noise elimination part 20 through first noise elimination part, 10 circular cone end faces.Second noise elimination part 20 receives the portion gas that 10 transmission of first noise elimination part come through the circular cone end face; Other gases are got in second noise elimination part 20 through the aperture on second noise elimination part, 20 conical surfaces 30 by housing 1 internal surface reflection back; Final gas through deceleration and noise reduction is discharged from through outlet pipe, and the sound decibel that discharge gas this moment has reduced about 90%.Can know that through test under the baffler of same airspeed, throughput and same length, the conventional hollow cylindrical baffler of the erasure effect of the super-silent baffler of the utility model can improve 50%-70%.

Specific embodiment described herein only is that the utility model spirit is illustrated.The utility model person of ordinary skill in the field can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from the spirit of the utility model or surmount the defined scope of appended claims.

Claims

1. super-silent baffler; It is characterized in that: comprise funnelform first noise elimination part and second noise elimination part; Opposite and the two top of said first noise elimination part and the second noise elimination part top direction is replaced each other; Said first noise elimination part and the second noise elimination part medial axis overlap, said first noise elimination part and the second noise elimination part inner hollow and on the conical surface of first noise elimination part and second noise elimination part, be placed with a plurality of apertures.

2. super-silent baffler as claimed in claim 1 is characterized in that: said aperture is circular aperture or polygonal aperture.

3. according to claim 1 or claim 2 super-silent baffler, it is characterized in that: the area of said each aperture is 1/300 to 1/150 of first noise elimination part or the second noise elimination part conical surface area.

4. according to claim 1 or claim 2 super-silent baffler, it is characterized in that: the conical bottom radius surface and the cone height of said first noise elimination part and second noise elimination part are identical.

5. according to claim 1 or claim 2 super-silent baffler, it is characterized in that: more said second noise elimination part of said first noise elimination part is more near airintake direction, and the said first noise elimination part conical bottom radius surface is less than the said second noise elimination part conical bottom radius surface.

6. according to claim 1 or claim 2 super-silent baffler, it is characterized in that: said super-silent baffler also comprises the quieter material that is coated on said first noise elimination part and the second noise elimination part outer surface.

7. super-silent baffler as claimed in claim 6 is characterized in that: said quieter material is glass wool, slag wool, porous fibre or polyester fibre.