CN202520398U

CN202520398U - Compound silencer for vehicle

Info

Publication number: CN202520398U
Application number: CN2011204502579U
Authority: CN
Inventors: 李福瑞
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-11-15
Filing date: 2011-11-15
Publication date: 2012-11-07
Anticipated expiration: 2021-11-15

Abstract

The utility model discloses a compound silencer for a vehicle. The compound silencer is made of metal steel plates, and comprises an air inlet perforated pipe, a micro-perforated pipe and an air exhaustion perforated hole, wherein the air inlet perforated pipe is arranged on the upper part of the silencer; the micro-perforated pipe is arranged in the middle of the silencer; the air exhaustion perforated hole is arranged on the lower part of the silencer; the front end of the air inlet perforated pipe is sealed by an upper end cover and is communicated with an air inlet pipe; the back end of the air inlet perforated pipe is sealed by an upper plug; the air inlet perforated pipe is connected with an outer cylinder body; the front end of the micro-perforated pipe is an expanding pipe; the back end of the micro-perforated pipe is a necking pipe; the micro-perforated pipe is welded in a combined mode and is fixed by a middle partition board after the combined welding; the middle partition board is segmentally welded with the outer cylinder body; the front end of the air exhaustion perforated hole is welded with a lower plug in a sealing mode; the middle section of the air exhaustion perforated hole is fixed by a lower partition board; the tail end of the air exhaustion perforated hole is welded with a lower end cover in a sealing mode and is communicated with an air exhaustion pipe; the air exhaustion pipe is welded with the lower end cover and the outer cylinder body in a sealing mode; a heat insulation cover is arranged on the surface of the outer cylinder body; and a fixed ring is welded on the surface of the outer cylinder body. The silencer for the vehicle is high in insertion loss, low in power loss, and good in noise reduction effect and vision effect, can be widely applied to engineering vehicles, large tractors and the like, is wide in noise reduction frequency range, and is high-temperature resistant, safe, reliable, firm and durable.

Description

A kind of vehicle is used composite muffler

Technical field

The utility model relates to a kind of Vehicular silencer, is specifically related to a kind of vehicle (particularly big-power tractor) of large-sized diesel motor that adopts and uses composite muffler, belongs to International Classification of Patents F01N technical field.

Background technique

At present, known vehicle is various in style with silencing apparatus, and its acoustic attenuation performance has his own strong points, by extensive employing.Yet; Along with country constantly increases the agricultural input; To increasing sharply of High-Powered Vehicle demand and improving constantly of people's environmental consciousness, and country is to after the continuous reinforcement of ambient noise control dynamics on policy, particularly " tractor safety requirement GB18447.1-2008 standard " modification; Requirement to pilot's line of vision has improved; The not competent new demand of existing silencing apparatus impels manufacturing enterprise constantly to expand thinking on the market, enhances product performance and the market competitiveness through new technology.

Summary of the invention

The purpose of the utility model is to overcome deficiency of the prior art, provides a kind of excellent noise reduction effect, the splendid High-Powered Vehicle of visual field effect to use composite muffler.

The purpose of the utility model realizes through following technological scheme.

A kind of vehicle is used composite muffler, is made by metal foil, and it comprises the air inlet perforated pipe on top, the micropunch pipe at middle part and the exhaust perforated pipe of bottom; Air inlet perforated pipe front end is sealed by upper end cap, and communicates with suction tude, and air inlet perforated pipe rear end is by last stifled sealing, and the air inlet perforated pipe is connected with outer cylinder body.Described micropunch pipe, its front end are expander, and the rear end is the reducing pipe, and micropunch pipe gang welding is fixed by central diaphragm behind the assembly welding, and is enclosed with glass fiber cloth in the stage casing, is filled with acoustical cotton in the cavity, central diaphragm and outer cylinder body segmentation welding; The front end of exhaust perforated pipe closes welding with blocking down, and the stage casing is fixed by lower clapboard, terminally welds with the lower end cap sealing, and communicates with outlet pipe; Sealing welding between outlet pipe and lower end cap, the outer cylinder body.

Drum surface is equipped with thermal shield outside, and the outer cylinder body surface soldered has retainer ring, and described thermal shield is fixed on the retainer ring; Thermal shield is 10-18mm apart from the distance on outer cylinder body surface.Anti-scald sign and connecting plate are installed on thermal shield.

The junction of lower end cap and outlet pipe is welded with gusset, on the suction tude between flange plate and the end cap, is welded with gusset, wherein 3 welded and installed double-screw bolts.

The punching rate of said micropunch pipe is 0.5%-3%.

The said outer dividing plate of air inlet perforated pipe that is installed in, being evenly equipped with all apertures on it is the hole of φ 14, its punching rate is 8%-25%.

It is 1 that described air inlet perforated pipe can be divided into the length ratio: 1-1: 3 two sections, and first section perforated pipe aperture φ 6, punching rate is 11%-18%, and head end and intermediate portion leave the 25-40mm blind pipe; Latter end perforated pipe aperture φ 6, punching rate is 11%-18%, end leaves the 5-15mm blind pipe.

The exhaust perforation of said exhaust perforated pipe is divided into two-part, and the aperture is φ 5-φ 6, head end punching rate 10%-20%; Head end closes weldering with blocking, and terminal punching rate is 11%-18%, is 25-40mm apart from lower end cap mouth distance; All the other are blind pipe, and perforated section accounts for the 40%-77% of exhaust perforated pipe length.

Said micropunch pipe assembly welding parts, and head end is pipe terminal are pipe, and intermediate portion is the micropunch pipe, and punching rate is 0-2%-4%, and perforated section accounts for the 60%-92% of exhaust perforated pipe length.

The utility model provides a kind of and has inserted the vehicle that loss is big, power loss is low, noise reduction is better, visual field effect is splendid and use silencing apparatus, can extensively use at aspects such as engineering vehicle and large tractors.Advantages such as the utility model is through the detection of relevant departments, and it inserts loss greater than 20dB, and power loss is less than 3%, and has the noise reduction wide frequency range, and is high temperature resistant, safe and reliable, sturdy and durable.After installation on the vehicle is on probation, make this type vehicle pass through the national departments concerned authentication smoothly, receive user's welcome.

Description of drawings

Fig. 1 is the sectional structure schematic representation of the utility model High-Powered Vehicle with composite muffler;

Fig. 2 is the A-A sectional view among Fig. 1;

Fig. 3 is the external structure schematic representation of composite muffler.

Among the figure: 1, upper end cap, 2, the air inlet perforated pipe, 3, upper clapboard, 4, outer cylinder body, 5, go up stifled, 6, expander, 7, central diaphragm; 8, micropunch pipe, 9, glass fiber cloth, 10, acoustical cotton, 11, the reducing pipe, 12, stifled down, 13, the exhaust perforated pipe, 14, lower clapboard; 15, lower end cap, 16, outlet pipe, 17, lower web plate, 18, retainer ring down, 19 thermal shields, 20, fixed plate; 21, go up retainer ring, 22, suction tude, 23, go up gusset, 24, anti-scald sign, 25, fixed bolt, 26, flange plate.

Embodiment

Referring to Fig. 1, Fig. 2, Fig. 3, the High-Powered Vehicle of the utility model is used composite muffler, and its structure comprises upper end cap 1, lower end cap 15, air inlet perforated pipe 2, upper clapboard 3, central diaphragm 7 and lower clapboard 14; Outer cylinder body 4 upward blocks up 5, blocks up 12 down, expander 6, micropunch pipe 8, glass fiber cloth 9; Reducing pipe 11, acoustical cotton 10, exhaust perforated pipe 13, outlet pipe 16, lower web plate 17; Following retainer ring 18, thermal shield 19, fixed plate 20, last retainer ring 21, suction tude 22;, last gusset 23, anti-scald sign 24, fixed bolt 25, flange plate 26 parts such as grade constitute.One end of suction tude 22 is connected with flange plate 26; The other end of suction tude 22 is connected with upper end cap 1, and upper end cap 1 is connected with outer cylinder body 4, all adopts seal weld; The front end of air inlet perforated pipe 2 and upper end cap 1 sealing welding; And communicate with suction tude 22, terminal and last stifled 5 sealing welding, the stage casing is fixing by upper clapboard 3.

Middle part at composite muffler; Expander 6, micropunch pipe 8, reducing pipe 11 assembly weldings, fixing by the central diaphragm that is positioned at expander 6 and reducing pipe 11 places 7 behind the assembly welding by respectively, and in the centre parcel glass fiber cloth 9; And fill acoustical cotton 10, central diaphragm 7 and outer cylinder body segmentation welding.

The front end of exhaust perforated pipe 13 and down stifled 12 sealing welderings, the stage casing is fixing by lower clapboard 14, terminal and lower end cap 15 seal welds, and communicate with outlet pipe 16.Adopt the sealing welding between outlet pipe 16 and lower end cap 15, the outer cylinder body 4; At the junction welding lower web plate 17 of lower end cap 15 with outlet pipe 16; Retainer ring 21 and following retainer ring 18 in the welding of the appropriate location of outer cylinder body 4; On the suction tude 22 between flange plate 26, the upper end cap 1, weld gusset 23, weld fixed bolt 25 at correct position on the last gusset 23.Thermal shield 19 is fixed on up and down on the retainer ring 18 and 21, fixed plate 20 is fixed on appropriate location, thermal shield 19 middle part, anti-scald sign 24 is fixed on the appropriate location of thermal shield 19.

The most of parts of the utility model are processed by metal foil.

The high temperature and high speed gas of being discharged by motor gets into behind the silencing apparatus at first through the noise elimination of expanding of air inlet perforated pipe 2 front aperture; And a part of air communication is crossed on the upper clapboard 3 orifice flow and is gone into next an actor's rendering of an operatic tune; Carry out resonant silencing, the end aperture effluent air carries out resonant silencing at next an actor's rendering of an operatic tune.Gas is descending is then eliminated the noise with acoustical cotton 10 by micropunch pipe 8 and outsourcing glass fiber cloth 9; Get into exhaust perforated pipe 13 head end hole gases resonant silencing again; End aperture gas is in the noise elimination of expanding again of next an actor's rendering of an operatic tune, thereby makes the tail gas that finally enters into outlet pipe 16 reach the purpose of noise elimination noise reduction.

Air inlet perforated pipe 2 is divided into two sections, first section perforated pipe aperture φ 6, and punching rate is 11%-18%, and head end and intermediate portion leave the 25-40mm blind pipe; Latter end perforated pipe aperture φ 6, punching rate is 11%-18%, and end leaves the 5-10mm blind pipe, and two segment length ratio is 1: 1-1: 3.

Upper clapboard 3 is uniformly distributed with the hole of all aperture φ 14 outside air inlet perforated pipe hole is installed, punching rate 8%-25%, and the air-flow path of used first expansion chamber and resonant chamber has been formed in participation respectively.

Micropunch pipe 8, expander 6, reducing pipe 11 assembly weldings.Micropunch pipe 8 punching rates of intermediate portion are 0.2%-4%, and at its outer wrap glass fiber cloth 9, the partially filled acoustical cotton 10 of cavity.

The exhaust perforation of exhaust perforated pipe 13 is divided into two-part; Aperture φ 5-φ 6, the head end punching rate is 10%-20%, and head end and stifled down 12 sealing welderings; Terminal punching rate is 11%-18%; Distance apart from 15 mouthfuls on closed lower lid is 25-40mm, and all the other are blind pipe, and its perforated section accounts for this length of tube 40%-70%.

Thermal shield 19 is rolled by special punching steel plate and forms, and is fixed on up and down on the retainer ring 21,18, is 10-18mm apart from the surface distance of outer cylinder body 4, surperficial spray black heat resistance paint.And anti-scald sign 24 is installed, is fixed on thermal shield 19 correct positions, in order to prevent the reminding maintenance man to be scalded.

Front end, upper end cap 1, upper clapboard 3, outer cylinder body 4 by air inlet perforated pipe 2 have constituted first expansion chamber jointly.By the end of air inlet perforated pipe 2, upper clapboard 3, outer cylinder body 4, upward stifled 5 front ends, central diaphragm 7, expander 6, micropunch pipe 8, reducing pipe 11 assemblies constitute first resonant chamber jointly.Constitute resistive anechoic chamber jointly by two central diaphragms 7, expander 6, micropunch pipe 8, reducing pipe 11, outer cylinder body 4, glass fiber cloth 9, acoustical cotton 10.By the central diaphragm 7 of end, outer cylinder body 4, expander 6, micropunch pipe 8, reducing pipe 11 assemblies are terminal with exhaust perforated pipe 13 front ends, stifled 12, lower clapboard 14 constitutes second resonant chamber jointly down, constitutes second expansion chamber jointly by lower clapboard 14, outer cylinder body 4, exhaust perforated pipe 13 ends, lower end cap 15.

After the high temperature and high speed gas of being discharged by motor got into silencing apparatus, at first the perforation through air inlet perforated pipe 2 head ends got into first expansion chamber and does to expand for the first time and eliminate the noise, and gets into air inlet perforated pipe 2 terminal discharges then, produces resonant silencing.Air-flow gets into expander 6, micropunch pipe 8, reducing pipe 11 assemblies, glass fiber cloth 9, the noise elimination of acoustical cotton 10 anechoic chambers; Air-flow gets into second resonant chamber, flows into exhaust perforated pipe 13 head ends, and eliminates the noise at this resonant chamber; Air-flow arrives the terminal and outflow of exhaust perforated pipe; Doing expands for the second time eliminates the noise, and discharges from outlet pipe 16 then, thereby makes the tail gas that finally enters into outlet pipe 16 reach the purpose of noise elimination noise reduction.

Claims

1. a vehicle is used composite muffler, is made by metal foil, it is characterized in that: it comprises the air inlet perforated pipe on top, the micropunch pipe at middle part and the exhaust perforated pipe of bottom; Air inlet perforated pipe front end is sealed by upper end cap, and communicates with suction tude, and air inlet perforated pipe rear end is by last stifled sealing, and the air inlet perforated pipe is connected with outer cylinder body; Described micropunch pipe, its front end are expander, and the rear end is the reducing pipe, and micropunch pipe gang welding is fixed by central diaphragm behind the assembly welding, and is enclosed with glass fiber cloth in the stage casing, is filled with acoustical cotton in the cavity, central diaphragm and outer cylinder body segmentation welding; The front end of exhaust perforated pipe closes welding with blocking down, and the stage casing is fixed by lower clapboard, terminally welds with the lower end cap sealing, and communicates with outlet pipe; Sealing welding between outlet pipe and lower end cap, the outer cylinder body.

2. vehicle according to claim 1 is used composite muffler, it is characterized in that: the mounted on surface at outer cylinder body has thermal shield, and the surface soldered of outer cylinder body has retainer ring, and described thermal shield is fixed on the retainer ring; Thermal shield is 10-18mm apart from the distance on outer cylinder body surface; Anti-scald sign and connecting plate are installed on thermal shield.

3. vehicle according to claim 1 is used composite muffler, it is characterized in that: the junction of described lower end cap and outlet pipe is welded with gusset, on the suction tude between flange plate and the end cap, is welded with gusset.

4. vehicle according to claim 1 is used composite muffler, it is characterized in that: the punching rate of said micropunch pipe is 0.5%-3%.

5. vehicle according to claim 1 is used composite muffler, it is characterized in that: the said outer dividing plate of air inlet perforated pipe that is installed in, and being evenly equipped with all apertures on it is the hole of φ 14, its punching rate is 8%-25%.

6. vehicle according to claim 1 is used composite muffler; It is characterized in that: it is 1 that described air inlet perforated pipe can be divided into the length ratio: 1-1: 3 two sections; First section perforated pipe aperture φ 6, punching rate is 11%-18%, and head end and intermediate portion leave the 25-40mm blind pipe; Latter end perforated pipe aperture φ 6, punching rate is 11%-18%, end leaves the 5-15mm blind pipe.

7. vehicle according to claim 1 is used composite muffler, it is characterized in that: described exhaust perforated pipe, and its exhaust perforation is divided into two-part; The aperture is φ 5-φ 6; Head end punching rate 10%-20%, head end close weldering with blocking, and terminal punching rate is 11%-18%; Apart from lower end cap mouth distance is 25-40mm, and all the other are blind pipe; Perforated section accounts for the 40%-77% of exhaust perforated pipe length.

8. vehicle according to claim 1 is used composite muffler, it is characterized in that: described micropunch pipe assembly welding parts, and head end is pipe; Terminal for managing; Intermediate portion is the micropunch pipe, and punching rate is 0.2%-4%, and perforated section accounts for the 60%-92% of exhaust perforated pipe length.