CN204877599U

CN204877599U - Muffler for motor vehicle

Info

Publication number: CN204877599U
Application number: CN201520410229.2U
Authority: CN
Inventors: 闫洁; 郑忠夏
Original assignee: LIUZHOU LIHE EXHAUST CONTROL SYSTEM CO Ltd
Current assignee: LIUZHOU LIHE EXHAUST CONTROL SYSTEM CO Ltd
Priority date: 2015-06-15
Filing date: 2015-06-15
Publication date: 2015-12-16
Anticipated expiration: 2025-06-15

Abstract

The utility model discloses a muffler for motor vehicle relates to car silencer manufacturing technical field, including the casing that is equipped with intake pipe and outlet duct, the inner space of casing is separated for first cavity, second cavity and third cavity along the orientation of admitting air by foraminiferous first baffle and second baffle, two are just passed in proper order to the terminal shutoff of intake pipe the baffle stretches into in the third cavity, the intake pipe in the second cavity with the third cavity is equipped with respectively to distribute on it has the foraminiferous pipeline section of a plurality of through -holes, the outlet duct in first cavity the second cavity with the third cavity is equipped with respectively to distribute on it has the foraminiferous pipeline section of a plurality of through -holes, the outlet duct in foraminiferous pipeline section in the third cavity is equipped with the high frequency sleeve pipe outward the high frequency sleeve pipe with be equipped with sound absorbing material between the outlet duct pipe wall. Compare prior art, the utility model discloses can solve the short and high problem of manufacturing cost of current silencer life.

Description

Silencer for motor vehicle

Technical field

The utility model relates to automotive muffler manufacturing technology field, especially a kind of silencing apparatus on the Motor Vehicle of small displacement engine.

Background technique

For the Motor Vehicle used compared with small displacement engine, due to the restriction by motor-vehicle chassis mounting point, configuration two-stage silencing apparatus usually.Have a kind of one-level silencing apparatus, this silencing apparatus comprises the housing be provided with into and out of tracheae, and the inner space of this housing is divided into three chambers by two pieces of dividing plates, is also provided with the intervalve that is communicated with two chambers, in two chambers, is filled with sound absorbing material; Described suction tude is provided with perforated sections in the first chamber, its tube wall is set with high frequency sleeve pipe, between this high frequency sleeve pipe and described suction tude tube wall, be provided with sound absorbing material; The inlet end of steam outlet pipe is horn mouth.In use there are the following problems for this silencing apparatus: 1, during engine operation, when air-flow is by the chamber that is provided with sound absorbing material, sound absorbing material absorbs the aqueous vapor in air-flow, and the time one is long, the silencing cotton absorbing a large amount of steam can corrode housing and dividing plate, and working life is short; 2, because steam outlet pipe inlet end adopts bell mouth shape structure, cost of production is high; 3, owing to high frequency sleeve pipe being located at suction tude outside the first chamber perforated pipe section, although reduce the pneumatic noise imported into from suction tude, but for the compact type silencing apparatus that volume is relatively little, high-frequency air flow regenerated noise is produced possibly air-flow is by arranging compacter inner assembly in silencing apparatus time, regenerated noise is spread out of by muffler outlet piper, makes the soundproof effect affecting silencing apparatus poor.

Model utility content

Technical problem to be solved in the utility model is to provide the good silencer for motor vehicle of a kind of soundproof effect, to solve the existing silencing apparatus short problem high with cost of production in working life.

The technological scheme that the utility model technical solution problem adopts is: this silencer for motor vehicle comprises the housing being provided with suction tude and steam outlet pipe, the inner space of described housing is divided into the first chamber, the second chamber and the 3rd chamber by the first dividing plate with holes and second partition along airintake direction, the tail end plugs of described suction tude and stretch in described 3rd chamber through two pieces of described dividing plates successively, described suction tude is respectively equipped with in described second chamber and described 3rd chamber the perforated sections it being distributed with multiple through hole; Described steam outlet pipe is respectively equipped with in described first chamber, described second chamber and described 3rd chamber the perforated sections it being distributed with multiple through hole, be provided with high frequency sleeve pipe outside the perforated sections of described steam outlet pipe in described 3rd chamber, between described high frequency sleeve pipe and described steam outlet pipe tube wall, be provided with sound absorbing material.

In above-mentioned silencer for motor vehicle technological scheme, technological scheme can also be more specifically: the quantity of described suction tude through hole on described 3rd chamber perforated sections is 4 times ~ 5 times of number of openings on described second chamber perforated sections; On two perforated sections of described suction tude, the equivalent area sum of through hole is described steam outlet pipe 1.8 times ~ 2.1 times of circulation area sum in hole on through hole and described first dividing plate on described second chamber perforated sections.

Further: described first dividing plate and described second partition are equipped with multiple diameter to be the described hole of 3 millimeters ~ 4 millimeters and at least one diameter the be macropore of 10 millimeters ~ 20 millimeters, the multiple described hole on described first dividing plate and described second partition is uniformly distributed.

Further: described suction tude is staggered in the perforated sections of described second chamber and described steam outlet pipe in the perforated sections of described second chamber, described suction tude is positioned at nearly described second partition place in the perforated sections of described second chamber, and described steam outlet pipe is positioned at closely described first dividing plate place in the perforated sections of described second chamber.

Owing to have employed technique scheme, the utility model compared with prior art has following beneficial effect: 1, due to suction tude tail end plugs, the quantity of suction tude through hole on the 3rd chamber perforated sections is 4 times ~ 5 times of number of openings on the second chamber perforated sections, most of air-flow can be made like this to flow into the 3rd larger chamber of volume by the through hole of suction tude on the 3rd chamber perforated sections, not only sound deadening capacity can be improved, better buffer function is had to pulse pneumatic, and flow into the second chamber by the through hole of suction tude on the second chamber perforated sections because of a small amount of air-flow, turn avoid air-flow and all enter the 3rd chamber and the too high problem of the silencer air inlet pipe local compression caused, on two perforated sections of suction tude, the equivalent area sum of through hole is steam outlet pipe 1.8 ~ 2.1 times of circulation area sum in hole on through hole and the first dividing plate on the second chamber perforated sections, the advantage done like this is, the path of discharging silencing apparatus by steam outlet pipe 5 because of the air-flow entering silencing apparatus by through hole on silencer air inlet pipe has two, one is enter steam outlet pipe by the through hole of steam outlet pipe on the second chamber to discharge, and two is enter the first chamber by first every dish to enter steam outlet pipe by the mouth of pipe of giving vent to anger and discharge.The relation that the area sum of silencing apparatus and air-flow discharge the area sum of silencing apparatus is entered by restriction air-flow, both ratio can have been avoided too small and make every dish through hole and steam outlet pipe excessive and lose its noise elimination effect in the second chamber via area sum, ratio can be avoided again to cross ambassador every dish through hole and the steam outlet pipe problem that the pressure loss that is that cause is excessive in the second chamber via area sum is too small; 2, air-flow is flowed out by through hole on suction tude tube wall, can attenuation portions high-frequency noise; And air-flow flows out at the small through hole by 360 degree, suction tude perforated sections surrounding tube axis, the diffusion of air-flow in second and third chamber can be made more abundant, also make muffler volume utilize more abundant, improve soundproof effect; 3, owing to high frequency sleeve pipe being arranged at steam outlet pipe outside the 3rd chamber perforated pipe section, even if air-flow can produce high frequency regeneration noise by the housing inner assembly of compact structure, these high frequency regeneration noises also can be absorbed by the high frequency sleeve pipe on steam outlet pipe, thus improve the soundproof effect of silencing apparatus, not be used in the second chamber and fill sound absorbing material, improve silencing apparatus working life; 4, two pieces of dividing plates all have equally distributed hole, be equivalent to small channel noise damping channel being divided into several parallel connections, noise elimination upper limiting frequency can be made to improve, improve medium, high frequency soundproof effect; In addition, also on two pieces of dividing plates, respectively open the macropore that a diameter is 10 ~ 20 millimeters, can make air-flow by during every block dividing plate diffusion evenly, muffler volume is made full use of more, makes air pulsing parameter more stable; 5, steam outlet pipe is provided with perforated sections in the inlet end of the first chamber, can reduce the local pressure loss of steam outlet pipe inlet end, substitutes existing steam outlet pipe inlet end bell mouth shape structure, reduces process costs; 6, suction tude is positioned at the perforated sections that the perforated sections of the second chamber and steam outlet pipe be positioned at the second chamber and is staggered, avoid the through hole noise air-flow out of the perforated sections accompanying suction tude second chamber directly enter steam outlet pipe from the through hole of the perforated sections of steam outlet pipe and discharge, make silencing apparatus fail to give full play to noise elimination effect.

Accompanying drawing explanation

Fig. 1 is the structural representation of the utility model embodiment.

Fig. 2 is the sectional view at the A-A place of Fig. 1.

Embodiment

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

Embodiment 1:

Silencer for motor vehicle as depicted in figs. 1 and 2 comprises the housing being provided with suction tude 9 and steam outlet pipe 5, housing is formed by connecting by front cover 1, rear end cover 7 and cylindrical shell 2, cylindrical shell 2 is surrounded by the steel plate eyelet of two superimposed, two-layered steel plates thickness is identical and equal 0.6 millimeter, the connection of cylindrical shell and front cover 1 and rear end cover 7 is end cap edge-curled type and connects, and is provided with drainage hole at rear end cover 7 edge; The inner space of housing is divided into the first chamber a, the second chamber b and the 3rd chamber c by the first dividing plate 3 with holes and second partition 4 along airintake direction, draining breach is provided with at the first dividing plate 3 and second partition 4 edge, first dividing plate 3 and second partition 4 to be equipped with multiple diameter be the hole 11 of 4 millimeters and diameter is that multiple holes 11 on macropore 10, first dividing plate 3 of 10 millimeters and second partition 4 are uniformly distributed; The tail end plugs of suction tude 9 and stretch in the 3rd chamber c through the first dividing plate 3 and second partition 4 successively, suction tude 9 is respectively equipped with in the second chamber b and the 3rd chamber c the perforated sections it being distributed with multiple through hole, and the quantity of suction tude 9 through hole on the 3rd chamber c perforated sections of the present embodiment is 4 times of number of openings on the second chamber b perforated sections; Steam outlet pipe 5 is respectively equipped with in the first chamber a, the second chamber b and the 3rd chamber c the perforated sections it being distributed with multiple through hole, and on two perforated sections of suction tude 9, the equivalent area sum in hole is steam outlet pipe 5 1.8 times of circulation area sum in hole on through hole and the first dividing plate on the second chamber b perforated sections; Suction tude 9 is staggered in the perforated sections of the second chamber b and steam outlet pipe 5 in the perforated sections of the second chamber b, and suction tude 9 is positioned at nearly second partition 4 place in the perforated sections of the second chamber b, and steam outlet pipe 5 is positioned at nearly first dividing plate 3 place in the perforated sections of the second chamber b; Be set with high frequency sleeve pipe 6 outside the perforated sections of steam outlet pipe 5 in the 3rd chamber c, between high frequency sleeve pipe 6 and the tube wall of steam outlet pipe 5 perforated sections, sound absorbing material 8 be housed, the sound absorbing material 8 of the present embodiment is acoustical cotton.

Embodiment 2:

The quantity of suction tude 9 through hole on the 3rd chamber c perforated sections is 5 times of number of openings on the second chamber b perforated sections; Steam outlet pipe 5 is respectively equipped with in the first chamber a, the second chamber b and the 3rd chamber c the perforated sections it being distributed with multiple through hole, and on two perforated sections of suction tude 9, the equivalent area sum in hole is steam outlet pipe 5 2.1 times of circulation area sum in hole on through hole and the first dividing plate on the second chamber b perforated sections; First dividing plate 3 and second partition 4 to be equipped with multiple diameter be the hole of 4 millimeters and diameter is that the hole 11 of multiple 4 millimeters on macropore 10, first dividing plate 3 of 20 millimeters and second partition 4 is uniformly distributed; Other features are identical with embodiment 1.

During work, air-flow enters from suction tude 9, and the through hole that the air-flow entered is arranged in the second chamber b and the second chamber c perforated sections from suction tude 9 respectively flows out, can attenuation portions high-frequency noise; And air-flow flows out at the small through hole by 360 degree, suction tude perforated sections surrounding tube axis, the diffusion of air-flow in second and third chamber can be made more abundant, also make muffler volume utilize more abundant, improve soundproof effect; During exhaust, be arranged at the high frequency sleeve pipe of steam outlet pipe outside the pipeline section of the 3rd chamber, again the high frequency regeneration noise that produced by housing inner assembly of Absorbable rod air-flow, improve the soundproof effect of silencing apparatus.

Claims

1. a silencer for motor vehicle, comprise the housing being provided with suction tude (9) and steam outlet pipe (5), the inner space of described housing is divided into the first chamber (a) by the first dividing plate (3) with holes and second partition (4) along airintake direction, second chamber (b) and the 3rd chamber (c), it is characterized in that: the tail end plugs of described suction tude (9) and stretch in described 3rd chamber (c) through two pieces of described dividing plates successively, described suction tude (9) is respectively equipped with in described second chamber (b) and described 3rd chamber (c) perforated sections it being distributed with multiple through hole, described steam outlet pipe (5) is respectively equipped with in described first chamber (a), described second chamber (b) and described 3rd chamber (c) perforated sections it being distributed with multiple through hole, be provided with high frequency sleeve pipe (6) outside the perforated sections of described steam outlet pipe (5) in described 3rd chamber (c), between described high frequency sleeve pipe (6) and described steam outlet pipe (5) tube wall, be provided with sound absorbing material (8).

2. silencer for motor vehicle according to claim 1, is characterized in that: the quantity of described suction tude (9) through hole on described 3rd chamber (c) perforated sections is 4 times ~ 5 times of number of openings on described second chamber (b) perforated sections; On two perforated sections of described suction tude (9), the equivalent area sum of through hole is described steam outlet pipe (5) 1.8 times ~ 2.1 times of circulation area sum in hole on through hole and described first dividing plate on described second chamber (b) perforated sections.

3. silencer for motor vehicle according to claim 1 and 2, it is characterized in that: described first dividing plate (3) and described second partition (4) are equipped with multiple diameter to be the described hole of 3 millimeters ~ 4 millimeters and at least one diameter the be macropore of 10 millimeters ~ 20 millimeters, the multiple described hole on described first dividing plate (3) and described second partition (4) is uniformly distributed.

4. silencer for motor vehicle according to claim 3, it is characterized in that: described suction tude (9) is staggered in the perforated sections of described second chamber (b) and described steam outlet pipe (5) in the perforated sections of described second chamber (b), described suction tude (9) is positioned at nearly described second partition (4) place in the perforated sections of described second chamber (b), and described steam outlet pipe (5) is positioned at closely described first dividing plate (3) place in the perforated sections of described second chamber (b).