CN2251623Y

CN2251623Y - Silencer for automobile

Info

Publication number: CN2251623Y
Application number: CN 95242866
Authority: CN
Inventors: 杨宇新
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-03-13
Filing date: 1995-03-13
Publication date: 1997-04-09
Anticipated expiration: 2005-03-13

Abstract

The utility model relates to a silencer for an automobile, which belongs to an accessory device of an automobile engine. The utility model is characterized in that the silencer for an automobile adopts more than one branch pipe, an internal chamber and a structure through which a front chamber and a rear chamber are communicated. The utility model of which parts of the components are removed becomes a heat collector. The utility model has the advantages of silencing ability on a wide frequency band and simple manufacture process, and has the functions of silencing and heat collection. The silencer for an automobile can be widely used for silencing harmful airstream, heat containing airstream and pulse airstream and used in heat collecting places.

Description

A kind of automotive muffler

The utility model belongs to the motor car engine fixture, particularly a kind of automotive muffler.

Through look into new before the utility model the automotive muffler of no same structure be disclosed or used.Existing automotive muffler is various.The noise elimination form that adopts has reactive muffling, resistance noise reduction, impedance complex to eliminate the noise and absorbs sound noise elimination etc.Silencing apparatus commonly used is the combination of above-mentioned several noise elimination forms.Its deficiency is: the silencing apparatus heat dissipation potential is poor, low-frequency noise acoustical absorptivity deficiency.Be on the frequency band at center resonance phenomenon to be arranged at 25 He Zhi, the flow at high speed of gas produces the above high-frequency noise of 800 He Zhi in the silencing apparatus.Make silencing apparatus become noise source.

The purpose of this utility model is to avoid above-mentioned the deficiencies in the prior art part, and a kind of new automobile silencing apparatus is provided.It has diffusion, clashes, lags and fill out valley noise elimination form and force cooling noise elimination form.Make pulsing airflow obtain cutting apart diffusion, form mild air-flow, eliminate pulse noise, avoid the low-frequency noise that resonates and occur, the pneumatic noise (high-frequency noise) of avoiding high velocity air to produce.Make it on wide frequency band, to have acoustical absorptivity.Eradicate the phenomenon that silencing apparatus becomes noise source from project organization.And realize the collection of automobile exhaust gas waste heat in passing.

The purpose of this utility model is to realize like this.A kind of automotive muffler is with reference to the invention of documents such as " Automobile Engineering Manual " second fascicle (day) in April, 1984 front page, " automobile construction " first volume in May, 1984 front page, " fixture of motor car engine ".The utility model is to be entered pipe, exhaust emission tube, lumen, main diffusion pipe, divided diffusing tube, storehouse plate, filter core, cooling medium to enter pipe, cooling medium discharge tube, ante-chamber dividing plate, back cavity diaphragm structure to form by ante-chamber, back cavity, ram's horns, inner chamber (comprising front interior cavity, rear interior cavity) and waste gas.Special way of the present utility model is: have concurrently and eliminate the noise and thermal recovery collection function.Adopted diffusion, clashed, lagged and fill out the valley noise elimination and force cooling to be eliminated the noise.So-called " spread, clash, lag and fill out the valley noise elimination " is meant that the air-flow of each pulse was become more than two-part by repeated segmentation when the paired pulses air-flow was eliminated the noise processing.These air-flows are divided in silencer to flowing, produce head-on collision then, and fill and lead up per two the interpulse zones, low valley of air-flow automatically.Make pulsing airflow before discharging silencer, eliminate pulsation, form the air-flow that tends to be steady.The utility model structurally adopts ram's horns, the inner chamber (comprising front interior cavity, rear interior cavity) more than one that ante-chamber is communicated with back cavity, the circulation area of ram's horns sum total enters pipe circulation area and waste gas greater than waste gas and enters pipe and be positioned at ante-chamber, exhaust emission tube is positioned at back cavity, also has the structural type design of lumen between ante-chamber and the back cavity.Making it becomes: ram's horns and inner chamber pass the wall of lumen, with the form of ante-chamber, back cavity connection.And being connected to the main diffusion pipe that waste gas enters pipe, hyperplasia low frequency wave again in the time of preventing that waste gas from entering silencing apparatus reduces the possibility that resonance appears in silencing apparatus.Forcing cooling to be eliminated the noise is to use other facility, forces cooling medium constantly to enter pipe from cooling medium and advances, and the lumen of flowing through goes out from the cooling medium discharge tube.Utilize the transmission of heat of shunting tube wall and internal chamber wall, force cooling to contain the method for hot air flow, obtain cooling off the effect of noise elimination.And gather waste gas residual heat in passing.The cooling medium of lumen of flowing through can be a gas, also can be liquid.Described cooling medium enters the axis of pipe and the axis of lumen is from state, makes the cooling medium that enters lumen be rope stream in lumen, to improve cooling noise elimination effect.The utility model is if the deletion member can become a kind of thermal recovery storage.But still keep ram's horns and inner chamber more than one, pass the wall of lumen is communicated with ante-chamber with back cavity structure.

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

Referring to accompanying drawing, ante-chamber (1), back cavity (2), ram's horns (3) and waste gas enters pipe (4), exhaust emission tube (5), front interior cavity (6), rear interior cavity (7), main diffusion pipe (8), storehouse plate (9), filter core (10), divide diffusing tube (11), lumen (12), cooling medium to enter the automotive muffler that pipe (13), cooling medium discharge tube (14), ante-chamber dividing plate (15), back cavity dividing plate (16) structure become to have concurrently noise elimination function and thermal recovery collection function.Motor is discharged contains thermal pulse waste gas and enters pipe (4) along filled arrows from waste gas and enter this device.The heat-containing waste gas that enters each pulse of this device is directly sent into main diffusion pipe (8).In the heat-containing waste gas of a pulse was flowed through the process of main diffusion pipe (8), a part of waste gas was divided into some according to 8 order after earlier～1 by numbered arrow, pass the different sections that the some diffusion holes on main diffusion pipe (8) wall enter front interior cavity (6).Enter another part waste gas of main diffusion pipe, pass main diffusion pipe (8) and do not hold the long-pending section of contracted section to enter rear interior cavity (7).The not end of rear interior cavity (7), main diffusion pipe (8), storehouse plate (9), filter core (10) constitute the cavity noise elimination structure, to the processing of eliminating the noise of this part waste gas.Enter the air-flow of rear interior cavity (7) through eliminating the noise after handling, separated into two parts, a part is passed the last hole more than one of storehouse plate (9) front interior cavity (6) that turns back along the direction of arrow, enter the air-flow of the different sections of front interior cavity (6) with aforementioned by numbering 8 elder generations～1 back order, generation is turned back and is interfered after the noise elimination, enters ante-chamber (1) along the arrow indication.Another part waste gas in the rear interior cavity (7) passes the last hole more than one of filter core (10) along the direction of arrow and enters back cavity (2).The subresonance cavity noise elimination structure that cavity filter core noise elimination structure that is formed by not end, storehouse plate (9), filter core (10), back cavity (2) exhaust emission tube (5) of rear interior cavity (7), main diffusion pipe (8) and back cavity (2) and back cavity dividing plate (16) form, the noise elimination structure group of forming is to this part waste gas that enters back cavity (2) processing of eliminating the noise.Enter the waste gas of back cavity (2), a part is directly discharged this device through exhaust emission tube (5).Another part waste gas produces head-on collision with the air-flow that comes from ante-chamber (1) direction stream in back cavity (2) or ram's horns (3).Produce head-on collision noise elimination effect.After the head-on collision, this part air-flow turns back under the air-flow that comes from ante-chamber (1) stream promotes, and enters back cavity (2) before at the next pulse air-flow, and this device is discharged along the arrow indication in the hole on a minute diffusing tube (11) and back cavity dividing plate (16).The waste gas of ante-chamber (1) will flow into back cavity (2), and the interior pressure that must possess ante-chamber (1) is higher than the such condition of interior pressure of back cavity (2).Such condition appears at pulse waste gas and passes the pulsation gap that filter core (10) enters back cavity (2), be zone, pulsating wave valley, in ante-chamber (1), press height, when forcing down in the back cavity (2), the interior air-flow velocity of each ram's horns (3) is just fast, and the gas that back cavity (2) is filled up is just many.Otherwise then slow, fill up few.During airflow counter-collision even for negative, fill up.This just forms so-called head-on collision, lags and fill out the valley.The utility model adopts each more than the pulsing airflow separated into two parts in addition, lines up the structure that precedence flows.Be generically and collectively referred to as " spread, clash, lag and fill out the valley noise elimination ".Adopt this kind noise elimination form.Discharge waste gas of the present utility model is tended to be steady.Exempt the condition that produces the high and low frequency noise.Make it on wide frequency band, to have acoustical absorptivity.The effect of described ante-chamber (1) be detained, waste gas that buffering enters from front interior cavity (6) and the air-flow that turns back from ram's horns (3) when receiving airflow counter-collision.Its effect is as reservoir.In described ante-chamber (1), increased porose ante-chamber dividing plate (15), made the part of ante-chamber (1) become resonant cavity, to improve acoustical absorptivity.Described minute diffusing tube (11) with the air-flow of ante-chamber (1) direction inflow back cavity (2), sent into the both sides of back cavity dividing plate (16), is of value to the pulsating wave that scabbles air-flow.The structure that described minute diffusing tube (11), back cavity (2), back cavity dividing plate (16), exhaust emission tube (5) are formed interferes resonant silencing to be handled to the air-flow that ram's horns (3) flows out, and waste gas is discharged from exhaust emission tube (5) then.It is the another means that the utility model is eliminated the noise that heat-containing waste gas is cooled off.As shown in drawings, increase lumen (12) between ante-chamber (1) and back cavity (2), make ram's horns and inner chamber pass the wall of lumen (12), cooling medium enters pipe (13), cooling medium discharge tube (14) places on the wall of lumen (12).The axis that cooling medium enters pipe (13) and the axis of lumen (12) from.Cooling medium is the rope stream mode and flows by after constantly entering lumen (12) shown in the A-A sectional drawing hollow core arrow in lumen (12), to improve cooling noise elimination effect.The cooling medium that flows out has also been finished the thermal recovery collection, can help to realize the automobile exhaust gas afterheat utilization.The utility model promptly becomes the automotive muffler that has noise elimination and thermal recovery collection function concurrently like this.The utility model deletion main diffusion pipe (8), storehouse plate (9), filter core (10), branch diffusing tube (11), ante-chamber dividing plate (15), back cavity dividing plate (16) promptly become a kind of thermal recovery storage.

The utility model has acoustical absorptivity on wide frequency band, manufacturing process is simple, have concurrently and eliminate the noise and thermal recovery collection function, can be widely used in noise elimination and thermal recovery collection place to being harmful to, containing heat, pulsing airflow.

Claims

1. automotive muffler is entered pipe, exhaust emission tube, lumen, main diffusion pipe, is divided diffusing tube, storehouse plate, filter core, cooling medium to enter pipe, cooling medium discharge tube, ante-chamber dividing plate, back cavity diaphragm structure to form by ante-chamber, back cavity, ram's horns, inner chamber and waste gas.It is characterized in that having ram's horns and inner chamber more than one, ante-chamber is communicated with back cavity.

2. a kind of automotive muffler according to claim 1 is characterized in that described ram's horns and inner chamber pass the wall of lumen.

3. a kind of automotive muffler according to claim 1, the axis that it is characterized in that axis that described cooling medium enters pipe and lumen from.

4. a kind of automotive muffler according to claim 1 is characterized in that the sectional area of the sectional area of described main diffusion pipe end less than other section of main diffusion pipe.

5. a kind of automotive muffler according to claim 1 is characterized in that described storehouse plate and filter core have the hole more than one.

6. a kind of automotive muffler according to claim 1 is characterized in that the circulation area sum total of described ram's horns enters the pipe circulation area greater than waste gas.

7. a kind of automotive muffler according to claim 1 is characterized in that dividing plate with holes is arranged in described ante-chamber and the back cavity.