CN201802458U

CN201802458U - Pressure-stabilizing mixed-flow type exhaust purification muffler

Info

Publication number: CN201802458U
Application number: CN2010205247563U
Authority: CN
Inventors: 季振林; 卜范滨; 王书来; 张守泉; 耿义涛; 郭刚
Original assignee: JILIN AIRUI ENVIRONMENTAL PROTECTION TECHNOLOGY Co Ltd
Current assignee: AIRUI (Chengdu) Emission Control Technology Co., Ltd.
Priority date: 2010-09-10
Filing date: 2010-09-10
Publication date: 2011-04-20
Anticipated expiration: 2020-09-10

Abstract

The utility model relates to a pressure-stabilizing mixed-flow type exhaust purification muffler. A front end cap and a rear end cap are respectively mounted at two lateral ends of a casing; the upper portion of the front cap and the lower portion of the rear end cap are respectively provided with an end opening; a cavity of the casing is divided into a first cavity, a second cavity, a third cavity and a fourth cavity by a front partition plate, a middle partition plate and a rear partition plate; an end opening at one end of an air inlet core tube is in butt joint with the end opening of the front end cap; the air inlet core tube is fixed onto the front partition plate, the middle partition plate and the rear partition plate and penetrates through the first cavity, the second cavity and the third cavity to the fourth cavity; the portion of the air inlet core tube in the first cavity is provided with a purifier casing, a liner and catalysts; an exhaust core tube is fixed onto the front partition plate, the middle partition plate and the rear partition plate, penetrates through the second cavity, the third cavity and the fourth cavity from the first cavity to the rear end cap; and an end opening of the exhaust core tube matches with the end opening of the rear end cap. The pressure-stabilizing mixed-flow type exhaust purification muffler is compact in structure and reasonable in design, and is capable of effectively reducing exhaust noise in the whole rotation speed range of an engine.

Description

Voltage stabilizing mixed-flow exhaust purging muffler

Technical field

The utility model relates to a kind of voltage stabilizing mixed-flow exhaust purging muffler device.

Background technique

At present, along with the understanding of people to automobile noise harm, management for noise control is all the more strict, and the engine exhaust system noise is the main noise source of automobile simultaneously, and adopting exhaust silencer rational in infrastructure so is to reduce the efficient ways of refrigerator car pass-by noise.Present existing acoustic wave filter structure generally comprises suction tude, housing, outlet pipe etc.And its silencing apparatus is expanssion type reactive muffler or impedance complex formula silencing apparatus basically.With regard to its principle, existing silencing apparatus mainly is structure and a Placement of considering the silencing apparatus expansion chamber, and the selection of sound-absorbing material, has but ignored the problem that flows to of air-flow.

Summary of the invention

The purpose of this utility model is to overcome the deficiency that exists in the above-mentioned technology, and a kind of compact structure, reasonable in design is provided, and can subdue the voltage stabilizing mixed-flow exhaust purging muffler device of exhaust sound in the whole speed range of motor effectively.

In order to achieve the above object, the technical solution adopted in the utility model is: be separately installed with front cover in the housing two side ends, rear end cover, front cover top, the rear end cover bottom is ported respectively, by preceding dividing plate, central diaphragm, rear bulkhead is divided into first chamber with the housing cavity, second chamber, the 3rd chamber, the 4th chamber, air inlet core pipe one end port and front cover have port and connect, be fixed on preceding dividing plate, central diaphragm, on the rear bulkhead, and run through first chamber, second chamber, the 3rd chamber is by the 4th chamber, air inlet core pipe is equipped with purifier shell at first chamber portion, liner, catalyzer, exhaust core pipe is fixed on preceding dividing plate, central diaphragm, rear bulkhead, and originate in first chamber and pass second chamber, the 3rd chamber, the 4th chamber ends in rear end cover, and its port and rear end cover port match.

The utility model has the advantages that:

1, compact structure, reasonable in design can be subdued the exhaust sound in the whole speed range of motor effectively;

2, automobile is in accelerating process, because the airspeed of the effect exhaust flow of pressure stabilizing cavity and expansion chamber in aperture increases, the gas viscosity effect in the aperture strengthens, and the high frequency acoustical absorptivity strengthens, thereby the overall acoustical absorptivity of silencing apparatus increases, and makes exhaust sound be effectively suppressed.

Description of drawings

Fig. 1 is the utility model structural representation;

Fig. 2 is dividing plate before the utility model, central diaphragm structural representation;

Fig. 3 is the utility model rear bulkhead structural representation;

Embodiment

Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail.

By Fig. 1-Fig. 3 as can be known, the utility model is separately installed with front cover 1 in housing 2 two side ends, rear end cover 8, front cover 1 top, rear end cover 8 bottoms difference ported 12,13, by preceding dividing plate 4, central diaphragm 6, rear bulkhead 7 is divided into first chamber 14 with housing 2 cavitys, second chamber 15, the 3rd chamber 16, the 4th chamber 17, air inlet core pipe 5 one end ports and front cover 1 have port one 2 and connect, dividing plate 4 before being fixed on, central diaphragm 6, on the rear bulkhead 7, and run through first chamber 14, second chamber 15, the 3rd chamber 16 is by the 4th chamber 17, air inlet core pipe 5 is equipped with purifier shell 3 at first chamber portion, liner 9, catalyzer 10, exhaust core pipe 11 is fixed on preceding dividing plate 4, central diaphragm 6, rear bulkhead 7, and originate in first chamber 14 and pass second chamber 15, the 3rd chamber 16, the 4th chamber 17 ends in rear end cover 8, and its port and rear end cover 8 port ones 3 match.

Described air inlet core pipe 5 and exhaust core pipe 11 are respectively equipped with a plurality of circular holes that differ in the aperture at first chamber and two sections positions of second chamber.

Described air inlet core pipe 5 exhaust ends pass rear bulkhead 7 and at the diameter of the 4th chamber portion air inlet core pipe 5 diameters less than first chamber 14, second chamber 15, the 3rd chamber 16 air inlet core pipes 5.

Voltage stabilizing mixed-flow exhaust purging muffler device described in the utility model, air-flow and sound wave enter pressure stabilizing cavity, the low-frequency noise of pulse pneumatic is by effective attenuation, sound wave enters second chamber 15, the 3rd chamber 16 by the aperture on suction tude and the steam outlet pipe, have the different aperture of size on the dividing plate between dividing plate between first chamber 14 and second chamber 15 and second chamber 15 and the 3rd chamber 16, thereby interfere mutually can fine reduction mid-frequency noise for sound wave in 3 chambeies.Aperture inflow, outflow that air communication is crossed on turnover tracheae and the dividing plate have produced cross flow and slipstream, thereby the viscosity of medium is converted into the noise elimination of heat energy realization high frequency with high-frequency sound energy in the hole.Thin channel in the purifier carrier can the effective attenuation mid-frequency noise.Automobile is in accelerating process, high frequency becomes to strengthen, overall level increases, because this moment, exhaust gas flow increased, the interior airspeed of the aperture of flowing through increases, and the gas viscosity effect in the aperture strengthens, and the high frequency acoustical absorptivity strengthens, thereby the overall acoustical absorptivity of silencing apparatus increases, and makes exhaust sound be effectively suppressed.

Claims

1. voltage stabilizing mixed-flow exhaust purging muffler, comprise housing, it is characterized in that: be separately installed with front cover (1) in housing (2) two side ends, rear end cover (8), front cover (1) top, rear end cover (8) bottom is ported (12) respectively, (13), by preceding dividing plate (4), central diaphragm (6), rear bulkhead (7) is divided into first chamber (14) with housing (2) cavity, second chamber (15), the 3rd chamber (16), the 4th chamber (17), air inlet core pipe (5) one end port and front cover (1) have port (12) and connect, be fixed on preceding dividing plate (4), central diaphragm (6), on the rear bulkhead (7), and run through first chamber (14), second chamber (15), the 3rd chamber (16) is by the 4th chamber (17), air inlet core pipe (5) is equipped with purifier shell (3) at first chamber portion, liner (9), catalyzer (10), exhaust core pipe (11) is fixed on preceding dividing plate (4), central diaphragm (6), rear bulkhead (7), and originate in first chamber (14) and pass second chamber (15), the 3rd chamber (16), the 4th chamber (17) ends in rear end cover (8), and its port and rear end cover (8) port (13) matches.

2. voltage stabilizing mixed-flow exhaust purging muffler according to claim 1 is characterized in that: described air inlet core pipe (5) and exhaust core pipe (11) are respectively equipped with a plurality of circular holes that differ in the aperture at first chamber and two sections positions of second chamber.

3. voltage stabilizing mixed-flow exhaust purging muffler according to claim 1 is characterized in that: described air inlet core pipe (5) exhaust end passes rear bulkhead (7) and at the diameter of the 4th chamber portion air inlet core pipe (5) diameter less than first chamber (14), second chamber (15), the 3rd chamber (16) air inlet core pipe (5).