CN202228155U

CN202228155U - Diesel silencer

Info

Publication number: CN202228155U
Application number: CN2011202897333U
Authority: CN
Inventors: 张怀谷
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-08-11
Filing date: 2011-08-11
Publication date: 2012-05-23
Anticipated expiration: 2021-08-11

Abstract

Aiming to solve the problems that the silencer of the prior art has poor noise reduction and elimination effects and short service life, the utility model provides a diesel silencer, which belongs to a silencer. The diesel silencer adopts the technical scheme that the diesel silencer includes a casing, an air inlet, an exhaust port and a noise elimination cavity, and is characterized in that the noise elimination cavity is designed into a multi-stage bottleneck-shaped cavity; a noise elimination and sound absorption wall forming the multi-stage bottleneck-shaped cavity in a surrounding manner is made of sound absorption type foam glass material, adopts a die matched with the noise elimination cavity being the multi-stage bottleneck-shaped cavity, and is one-step formed and roasted through adopting the glass dust foaming technology; the casing is made of a metal plate with high intensity and excellent ductility; and the noise elimination and sound absorption wall is fixedly connected with the casing in an over-edging and scarf joint manner. The implementation proves that the diesel silencer greatly reduces noise of the diesel, particularly the middle and the low frequency noises generated by waste gas with higher sound energy flowing in an exhaust passage at a high speed, and greatly prolongs the service life with respect to manufacturing material and reasonable structure.

Description

A kind of diesel engine silencer

Technical field

The utility model belongs to a kind of silencing apparatus, particularly a kind of diesel engine silencer.

Background technique

Existing diesel engine silencer; As shown in Figure 2, the silencing apparatus in the patent application case of documents 1 publication number CN 201496126U is by housing 01, inlet and outlet mouth 02,03; The labyrinth 04 that forms in the housing; The cavity upside of housing and downside are provided with V-type insulation board 05 and constitute, and the V-type insulation board is taked interlaced arrangement, and housing and insulation board all adopt sound absorbing material to process.In actual use, there is following deficiency in it:

1, noise reduction noise elimination weak effect.Point out among the reference A " analysis of diesel exhaust noise frequency and reactive muffler structure " (middle figure classification number TM611.22 " portable power source and vehicle " 2005 the 3rd phase Rong Jiang peak, Wei Cunhai): the exhaust sound of diesel engine comprises two aspects, the one, and the waste gas medium and low frequency noise below the 800Hz that produces that in air outlet flue, flows; The 2nd, the shock wave that produces during cylinder of diesel engine internal combustion oil gas is along near the high-frequency noise the 3000Hz of air outlet flue radiation.And be Main Ingredients and Appearance with the medium and low frequency noise of waste gas below the 800Hz that the air outlet flue high speed flow to produce.Documents 1 disclosed silencing apparatus is to stop the dissipative muffler of acoustic board in air outlet flue with setting on the one hand, and it is longer than the high-frequency noise noise reduction is eliminated the noise, and has little effect to eliminating the noise as the medium and low frequency noise of diesel engine noise Main Ingredients and Appearance; Its " labyrinth " formula cavity can increase the menifold pneumatic noise described in the reference A simultaneously on the other hand.So actual the use also proves its noise reduction noise elimination weak effect.

2, working life is short.Those of ordinary skill in the art knows, and the housing of silencing apparatus will be stood the impact of the quite high combustion gas of speed, adopts the not high sound absorbing material of the strength of materials to make housing, is not that the life-span is extremely short, is exactly can't implement to use at all; Secondly, in the impact of the quite high combustion gas of speed, its inner acoustic board stands in the breach especially, adopts the waste gas that receives discharge at a high speed easily to break the V-structure of damage, has then more accelerated the aging damage of acoustic board.So actual the use also proves several months only in its working life.

This shows that it is effective to study and design a kind of noise reduction noise elimination, the diesel engine silencer of long service life is necessary.

The model utility content

The purpose of the utility model is the deficiency that overcomes existing technology, and it is effective to study and design a kind of noise reduction noise elimination, the diesel engine silencer of long service life.

The technological scheme that realizes the utility model purpose is: a kind of diesel engine silencer, comprise housing, and suction port, relief opening, noise elimination cavity is characterized in that noise elimination cavity is designed to multistage bottleneck shape cavity; The noise elimination sound-absorbing wall that surrounds multistage bottleneck shape cavity adopts sound-absorbing type multi cellular glass material to constitute.

The purpose of the utility model can also take following further technical measures to realize:

The Manufacturing material of described housing adopts the good metal metal plate material of strength high toughness to process.

The mould of the noise elimination cavity coupling of described noise elimination sound-absorbing wall employing and multistage bottleneck shape cavity forms through the once-through of glass powder foam process, roasting.

Adopt bound edge interlocking mode fixed connection between described noise elimination sound-absorbing wall and the housing.

Multi cellular glass is to be base-material with glass powder, adds stabilizer, after die for molding, forms through tunnel cellar for storing things high-temperature roasting.It is light to have unit weight, and thermal conductivity is little, it is wet not pass through, water absorption rate is little, do not burn, not malicious change, mechanical strength are high, easy to process, own nontoxic, the characteristic of stable performance.Its important value not only is to use all the year round and undergoes no deterioration simultaneously, and itself plays fire prevention, antihunt action again.In low-temperature deep, underground engineering, inflammable and explosive, not only safe and reliable when using under humidity and the chemical erosion severe rugged environment, and also durable in use.Sound-absorbing type multi cellular glass is with its inorganic silicate material and small pore, and is good with soundproof effect in the noise elimination sound absorbing material, long service life and coming into one's own.

The technological scheme of the utility model has compared with prior art shown following beneficial effect through enforcement:

1, noise reduction is eliminated the noise effective.In the utility model; According to " multistage expanssion type " the noise elimination cavity principle of being recommended among the reference A; At first noise elimination cavity is designed to multistage bottleneck shape cavity; Waste gas is produced effective multistage decay at the medium and low frequency noise that the air outlet flue high speed flows below the 800HZ that produces, formed the resonant silencing structure at the rear portion near relief opening, the shock wave that produces during to cylinder of diesel engine internal combustion oil gas also obtains effective attenuation along near the high-frequency noise the 3000HZ of air outlet flue radiation; Become the medium and low frequency noise below the main attenuate acoustic noise Main Ingredients and Appearance 800HZ, take into account near the reactive muffler of the high-frequency noise of decay 3000HZ.Stop that with setting the dissipative muffler of acoustic board in air outlet flue compare the inevitable noise that reduce diesel engine significantly with documents 1 is disclosed.

2, prolonged working life significantly.Adopt the good metal metal plate material of strength high toughness to process suppressor case in the utility model, adopt sound-absorbing type multi cellular glass to make noise elimination sound-absorbing wall again, substitute disclosed suppressor case and the insulation board that all adopts sound absorbing material to process in the existing technology documents 1; Adopt the extremely long smooth noise elimination sound-absorbing wall of sound-absorbing type multi cellular glass making in working life, alternative employing receives the insulation board that the waste gas of discharging at a high speed breaks the V-structure of damage easily, has prolonged working life significantly from Manufacturing material and Rational structure two aspects.

Description of drawings

Fig. 1 is the schematic representation that meets the utility model thematic structure; Fig. 2 is existing diesel engine silencer structural representation.

Embodiment

Below in conjunction with accompanying drawing the implementation detail of the utility model is explained as follows:

As shown in Figure 1, a kind of diesel engine silencer comprises housing 1, suction port 2, and relief opening 3, noise elimination cavity 4 is characterized in that noise elimination cavity is designed to multistage bottleneck shape cavity; The noise elimination sound-absorbing wall 5 that surrounds multistage bottleneck shape cavity adopts sound-absorbing type multi cellular glass material to constitute.

As shown in Figure 1, the Manufacturing material of described housing 1 adopts the good metal metal plate material of strength high toughness to process.

As shown in Figure 1, the mould of noise elimination cavity 4 couplings of described noise elimination sound-absorbing wall 5 employings and multistage bottleneck shape cavity forms through the once-through of glass powder foam process, roasting.

As shown in Figure 1, adopt bound edge interlocking mode fixed connection between described noise elimination sound-absorbing wall 5 and the housing 1.The Manufacturing material that this design is based on housing adopts good metal metal plate material of strength high toughness and the noise elimination sound-absorbing wall of processing through the once-through of glass powder foam process, roasting, and its beneficial effect is to connect firmly.

Claims

1. a diesel engine silencer comprises housing (1), suction port (2), and relief opening (3), noise elimination cavity (4) is characterized in that noise elimination cavity is designed to multistage bottleneck shape cavity; The noise elimination sound-absorbing wall (5) that surrounds multistage bottleneck shape cavity adopts sound-absorbing type multi cellular glass material to constitute.

2. diesel engine silencer according to claim 1 is characterized in that the Manufacturing material of described housing (1) adopts the good metal metal plate material of strength high toughness to process.

3. diesel engine silencer according to claim 1 is characterized in that described noise elimination sound-absorbing wall (5) adopts and the mould of noise elimination cavity (4) coupling of multistage bottleneck shape cavity, forms through the once-through of glass powder foam process, roasting.

4. according to claim 2 or 3 described diesel engine silencers, it is characterized in that adopting between described noise elimination sound-absorbing wall (5) and the housing (1) bound edge interlocking mode fixed connection.