CN201461034U

CN201461034U - Exhaust silencer for light-weight cars

Info

Publication number: CN201461034U
Application number: CN2009200311768U
Authority: CN
Inventors: 张宗林; 任怀勤; 朱连明; 高培海
Original assignee: ZHUCHENG HAIDEWEI MACHINE CO Ltd
Current assignee: ZHUCHENG HAIDEWEI MACHINE CO Ltd
Priority date: 2009-08-14
Filing date: 2009-08-14
Publication date: 2010-05-12
Anticipated expiration: 2019-08-14

Abstract

The utility model discloses an exhaust silencer for light-weight cars, wherein two end covers are occluded at two ends of a shell body, three partition boards are arranged on the inner wall of the cavity of the shell body, an air inlet pipe penetrates through the three partition boards, an interference hole and a vent hole are arranged on the air inlet pipe, an air outlet pipe goes through the three partition boards, one end of the air outlet pipe is arranged in a cavity between the end cover 1 and the partition board 5, an interference hole is arranged on the air outlet pipe, and acoustic material is on the peripheral wall, which is jointed with the partition board 9, of the air outlet pipe. Through the arrangement, the utility model fully utilizes the high efficient sound proofing function of the silencer in a resonant cavity, thereby effectively reducing the exhaust noise and achieving good practical application effect.

Description

The light-duty vehicle exhaust silencer

Technical field

The utility model belongs to engine exhaust muffler, particularly relates to a kind of exhaust silencer that utilizes interference, resonance principle and the resistive sound-absorbing material composition of sound wave.

Background technique

At present, existing exhaust silencer mainly adopts the resistance exhaust silencer structure of pipeline section expansion and cross-sectional constriction, utilize sound wave in the variation of abrupt change of cross-section place owing to acoustic reactance, some sound wave reflects back to sound source, and the not outlet by silencing apparatus, thereby reach the purpose of noise elimination, but this silencing apparatus is when using on minicar, the shortcoming of indivedual strong noise frequency contents can not be effectively eliminated in existence.

Summary of the invention

The purpose of this utility model is to provide a kind of interference of sound wave, existing wideband noise elimination feature that resonance principle is formed utilized can carry out the impedance composite exhaust silencer that emphasis is eliminated the noise at certain frequency (as the motor fundamental frequency) again.

The technical solution of the utility model is: the two ends at housing are occluding with two end cap, on the shell cavity inwall, be provided with three dividing plates, suction tude runs through three dividing plates, one end opening of suction tude, the other end sealing is provided with on suction tude and interferes hole and vent, steam outlet pipe connects three dividing plates, one end of steam outlet pipe is located in the cavity between end cap 1 and the dividing plate 5, is provided with to interfere the hole on steam outlet pipe, and sound-absorbing material is located on the perimeter wall of steam outlet pipe and dividing plate 9 connecting parts.

By above setting, the utility model has effectively been eliminated the fundamental frequency noise of motor in actual entrucking is used, obtained good effect.

Description of drawings

Now the utility model is described in further detail in conjunction with the accompanying drawings.

Fig. 1 is the utility model structural representation.

Fig. 2 is the A-A sectional view.

Fig. 3 is the B-B sectional view.

Among the figure 1, end cap 2, suction tude 3, interfere hole 4, housing 5, dividing plate 6, interfere hole 7, dividing plate 8, vent 9, dividing plate 10, resonant cavity 11, end cap 12, steam outlet pipe 13, sound-absorbing material 14, interfere the hole

Embodiment

As Fig. 1, shown in 2, the utility model is occluding with two

end cap

1 and 11 at the two ends of housing 4, on housing 4 cavity inner walls, be provided with three dividing

plates

5,7 and 9, suction tude 2 runs through three dividing

plates

5,7 and 9, one end opening of suction tude 2, the other end sealing, on suction tude 2, be provided with and interfere

hole

3,6 and vent 8, steam outlet pipe 12 connects three dividing

plates

5,7 and 9, one end of steam outlet pipe 12 is located in the cavity between end cap 1 and the dividing plate 5, on steam outlet pipe 12, be provided with and interfere hole 14, sound-absorbing material 13 to be located on the perimeter wall of steam outlet pipe 12 and dividing plate 9 connecting parts, be provided with resonant cavities 10 in the middle of dividing plate 9 and the end cap 11.

The noise that enters silencing apparatus from engine exhaust pipe enters the 3rd chamber through suction tude 2 from vent 8, the expansion of realization one-level, eliminate partial noise, simultaneously because the effect of resonant cavity 10, make near the noise the motor fundamental frequency obtain very big elimination, noise is when the 3rd chamber enters second chamber, the expansion of realization secondary, eliminate partial noise, owing to the vibration friction of the aperture of noise on dividing plate 7, the part high-frequency noise is eliminated simultaneously, and with noise interference from interfering hole 6 to be come out, some frequency content noise is eliminated, and when noise enters first chamber from second chamber, realizes three grades of expansions, eliminate partial noise, and with noise interference from interfering hole 3 to be come out, some frequency content noise is eliminated, noise is being discharged the way of silencing apparatus from first chamber, interfere with the noise of coming in from interference hole 14, eliminate some frequency noise, and because the effect of sound-absorbing material 13, the part high-frequency noise is eliminated.

The utility model has made full use of the efficient noise elimination effect of RESONANT CAVITY MUFFLER, the higher component frequency of noise contribution is carried out emphasis eliminate the noise, and effectively reduces exhaust sound, has obtained the good actual application effect.

Claims

1. light-duty vehicle exhaust silencer, it is characterized in that: the two ends at housing are occluding with two end cap, be provided with three dividing plates on the shell cavity inwall, suction tude runs through three dividing plates, an end opening of suction tude, the other end sealing, be provided with on suction tude and interfere hole and vent, steam outlet pipe connects three dividing plates, and an end of steam outlet pipe is located in the cavity between end cap (1) and the dividing plate (5), be provided with on steam outlet pipe and interfere the hole, sound-absorbing material is located on the perimeter wall of steam outlet pipe and dividing plate (9) connecting part.