CN109404089A - Porous exhaust resonance squelch type silencer and generating set - Google Patents

Abstract

The invention discloses a kind of porous exhaust resonance squelch type silencer and generating sets, including air inlet pipe, exhaust pipe and noise elimination cylinder, it is vented seal of tube insertion noise elimination cylinder lumen and insertion pipeline section is exhaust resonance pipeline section, it is vented the closing of resonance pipeline section medial end, side wall is provided with multiple exhaust resonance hole inside and outside connection exhaust resonance pipeline section, the present invention is during engine exhaust, elimination is pressed, noise elimination and buffering effect with porous plate, after engine exhaust enters exhaust resonance pipeline section by exhaust resonance hole, it is superimposed have regular interaction since the bias power frequency that previous exhaust is formed has between the intracorporal pressed gas of silencing pot and in exhaust resonance pipeline section, to generate the regular resonance of better effects, realize noise-and-vibration-reduction, and it improves silencer since the resonance of rule makes engine exhaust smooth and starts Machine working efficiency reaches energy-efficient purpose；Meanwhile acoustic wave filter structure of the invention is simple, is simply processed using existing profile i.e. plastic, and can change size according to the flexible in size of engine displacement, and keep structure constant, have stronger adaptability.

Description

Porous exhaust resonance squelch type silencer and generating set

Technical field

The present invention relates to the environment protection fields that engine exhaust noise reduction is mute, and in particular to a kind of to reach quiet using resonance effect The muffler for motor and its engine of sound.

Background technique

Generating set belongs to common universal machine, and small power generation unit mostly uses engine driving, due to use environment Requirement with higher, and engine noise is then one of main environmental protection index of generating set.Muffler for motor is to start One of main component of machine is the necessary condition that engine runs mute noise reduction.Since engine is generated by the detonation of fuel High pressure is to generate driving power, therefore exhaust noise is larger, how to eliminate noise to the greatest extent to the greatest extent, is then engine art The major issue that technical staff thinks deeply for a long time.In the prior art, muffler for motor has been able to more elimination engine row Gas noise, but be technically difficult to realize further reduction noise.Existing silencer is more resistive to be disappeared using traditional Sound device, reactive muffler and the two composite muffler, it is more to be improved in silencer internal structure, expect to be formed preferable Noise elimination effect.But there is no the factors considered other than silencer internal structure itself for the improvement of the prior art, therefore, Causing silencer whole interior, structure is complicated, and operation back pressure is higher, is also realized by the higher absorbent treatment auxiliary of thickness maximum Noise elimination purpose, increase manufacturing cost；To solve the above problems, in the prior art, relatively simple acoustic wave filter structure such as Fig. 1 Shown, air inlet pipe 11 and exhaust pipe 12 are inserted into noise elimination cylinder, and inserting paragraph be equipped with aperture (including inserting paragraph opening also by Orifice plate closing), 1101,1102,1201,1202 in figure shown in be respectively provided with multiple apertures, being formed horizontal and vertical has air-flow The intake and exhaust structure of distributing buffering；Meanwhile be additionally provided with intermediate buffering section, intermediate buffering section include front baffle, rear bulkhead and in Between cylinder 41, intermediate cylinder is generally two, and one of one end is connected to air inlet, other end closing, the connection of another intermediate cylinder one end Exhaust, the other end are closed, and to close at 13,14 meanings two in figure, two intermediate cylinders are between the front baffle and rear bulkhead Part be equipped with venthole 4101, then exhaust gas is introduced into an intermediate cylinder, and passes through another intermediate cylinder after being discharged by stomata Stomata enter after be discharged, form the effect of two intermediate cylinders series connection exhaust, be finally discharged by exhaust pipe；Entire silencer is from knot It is reactive muffler principle on structure, the diameter of two intermediate cylinders also becomes larger according to the successive diameter of exhaust, convenient for buffering；And from into From the point of view of in the stomata orientation being arranged on tracheae and exhaust pipe, noise-and-vibration-reduction is realized also with resistance principle；But the structure disappears Sound device still remains the larger problem of back pressure, and noise reduction effect is unsatisfactory, only up to reach 25dB.

Therefore, it is necessary to the silencers to the prior art to improve, elimination back existing in the prior art by a relatively large margin The problem for pressing higher caused noise, vibration larger, using relatively simple structure, avoiding complicated structure reduces venting quality The problem of energy, engine efficiency is effectively improved, and reduce manufacturing cost.

Summary of the invention

In view of this, the object of the present invention is to provide a kind of porous exhaust resonance squelch type silencer and generating set, compared with It significantly eliminates the higher caused noise of back pressure existing in the prior art, shake larger problem, using relatively simple Structure avoids the problem of complicated structure reduces exhaust performance, effectively improves engine efficiency, and reduce manufacturing cost.

Porous exhaust resonance squelch type silencer of the invention, including air inlet pipe, exhaust pipe and noise elimination cylinder, the exhaust The seal of tube is inserted into noise elimination cylinder and insertion pipeline section is exhaust resonance pipeline section, the exhaust resonance pipeline section medial end closing, side wall It is provided with multiple exhaust resonance hole inside and outside connection exhaust resonance pipeline section；Since exhaust resonance pipeline section side wall is equipped with exhaust resonance Hole, during engine exhaust, by noise elimination cylinder row come this exhaust gas by be vented resonance hole from side into Enter in exhaust pipe, arranged the exhaust gas more than the institute in exhaust pipe with last time automatically and overlap the resonance of pests occurrence rule in frequency, with compared with Good buffering resonance effect guarantees that entire silencer can reduce exhaust resistance and raising in the resonance that eventually forms of exhaust Engine efficiency further decreases exhaust noise, is conducive to environmentally friendly and effective energy conservation.

Further, the exhaust resonance hole is radial through-hole, and being distributed in for approaches uniformity is vented resonance pipeline section or incites somebody to action It is vented the distribution of resonance pipeline section blockette approaches uniformity within the scope of block；Radial through-hole is conducive to processing and is easily formed and mainstream The vertical bypass flow in road, bypass flow have the function of forming resonance, to advanced optimize resonance noise reduction effect；It is approximate equal Even distribution refers to the interval error that the spacing between Kong Yukong is of substantially equal, allows to have certain, will be vented resonance pipeline section subregion Block refers to the easily manufactured not processing gas inlet resonance hole near weld seam, or artificially will exhaust resonance pipeline section be divided into it is several Block, the processing gas inlet resonance hole within the scope of block, can targetedly form resonance, have the noise reduction effect of setting.

Further, the ratio between the perforated area summation in the multiple exhaust resonance hole and exhaust resonance pipeline section lumenal cross-section product For 1.5-2.5:1, the lumenal cross-section area and the lumenal cross-section area ratio of air inlet resonance pipeline section for being vented resonance pipeline section are 1.5-1.6:1；The generation of resonance needs to be vented between resonance inner tube segment air-flow and external pressure (in hush pipe body) and logical The reasonable cooperation that resonance detour exhaust resonance hole occurs between the air-flow of resonance and the discharge air-flow ratio in exhaust resonance hole is crossed to come It realizes, the aforementioned proportion range is bigger than normal, forms direct exhaust resistance, and noise is formed at exhaust pipe, and it is less than normal, it completes Not comprehensive resonance effect resonance for being expected, or even resonance can not be formed；Meanwhile coordination is matched with air inlet resonance pipeline section, And then matched with the parameter of intermediate harmonic cylinder, form lasting resonance effect.

Further, the perforated area summation in the multiple exhaust resonance hole accounts for the 25%- of exhaust resonance pipeline section developed area 40%；The resonance effect of expectation needs enough perforated areas and cooperates to be vented the length and caliber size of resonance pipeline section, such as The single pursuit perforated area of fruit then will affect the integral strength of exhaust resonance pipeline section, it may occur that resonance is broken and increases vibration Overall resonance can be cannot achieve if perforated area is too small with noise is increased, so that the effect finally expected be not achieved.

Further, the ratio between the perforated area summation in the multiple exhaust resonance hole and exhaust resonance pipeline section lumenal cross-section product Perforated area summation for 2:1, the multiple exhaust resonance hole accounts for the 30% of exhaust resonance pipeline section developed area；It is vented resonance hole Area summation, exhaust resonance pipeline section lumenal cross-section product with exhaust resonance pipeline section developed area (need the quasi- of length and inner cavity Conjunction reaches aforementioned proportion) between have reasonable structural parameters, can be only achieved aforementioned proportion, to reach optimal resonance noise reduction Effect, and can guarantee air inlet resonance pipeline section intensity itself, avoid occurring vibration to influence whole noise elimination effect；Certainly, air inlet There is common coordination between above-mentioned parameter between resonance pipeline section, intermediate harmonic cylinder and exhaust resonance pipeline section, by air inlet to finally Exhaust successively sequence resonance buffering exhaust, reach final buffering resonance noise reduction effect.

Further, the noise elimination cylinder is the tubular of cross section rule, and the exhaust resonance pipeline section edge disappears perpendicular to described The direction of cylinder record body longitudinal center line is inserted into and insertion depth is the longitudinal center line of noise elimination cylinder nearby or more than noise elimination cylinder Longitudinal center line, but total intubating length be not to be exceeded noise elimination cylinder lumen in this direction total length 60%；It is vented The depth that resonance pipeline section is inserted into noise elimination cylinder has apparent influence to resonance is formed, and insertion range is big, conducive to being formed in cavity A wide range of resonance, but range is excessive, will affect the exhaust resonance hole resonance exhaust of exhaust resonance pipeline section, causes bigger make an uproar Sound and vibration, therefore, the insertion depth of optimum range are the 56-58% or so of noise elimination cylinder lumen total length in this direction, There is turning movement to participate in the resonance of exhaust resonance hole outlet, it can be achieved that entire exhaust section in the exhaust resonance hole for being vented resonant section Resonance finally realizes noise reduction effect.

Further, the noise elimination cylinder inner surface is provided with the absorbent treatment with a thickness of 25-35mm, and certainly, absorbent treatment is set It sets and the inner cylinder with sound-absorbing hole is needed to fix absorbent treatment, the setting of absorbent treatment is so that this programme forms impedance composite muffler Structure reaches optimal noise reduction effect, also, absorbent treatment thickness is much smaller than the prior art, so that silencer cost of the invention It reduces, weight saving, and reduces the maintenance cost in later period.

Further, the noise elimination cylinder is the tubular of cross section rule, and generally circular in cross section cylinder, cross section is circle；It is described Resonance pipeline section edge is vented perpendicular to the direction insertion of the noise elimination cylinder longitudinal center line and insertion depth is to noise elimination cylinder Longitudinal center line nearby or be more than longitudinal center line, noise elimination cylinder front-end and back-end are all closed, exhaust resonance pipeline section with The distance of noise elimination cylinder back-end is the half of lateral dimension or so for being vented resonance pipeline section on this direction；Due to being vented resonatron Section is cylindric, therefore above-mentioned refer to air inlet resonance pipeline section in the half of lateral dimension or so that this side up and be vented humorous The radius of vibration tube section, details are not described herein；Exhaust pipe in this programme is to form resonance and buffering at a distance from silencer rear end One of condition certainly, apart from excessive, it is slow that resonance can not be formed so as to avoid the direct Contact -impact of exhaust and end Punching, avoids the increase of exhaust noise.

Further, further include be located at the endoceliac interior resonance component of silencing pot, the interior resonance component include front baffle, after Partition and intermediate harmonic cylinder, the front baffle and rear bulkhead are sealed in silencing pot body side by side according to gas flow front and back Chamber, and noise elimination cylinder lumen is separated into and before front baffle and is connected to the inlet chamber of air inlet pipe, is located at front baffle and rear bulkhead Between middle resonant cavity with after rear bulkhead and be connected to the discharge chamber of exhaust pipe, the corresponding support in intermediate harmonic cylinder both ends In the front baffle and rear bulkhead, as shown, intermediate harmonic cylinder both ends may pass through the front baffle and rear bulkhead and form branch Support, certainly, circumferencial direction needs to form sealing (welding), and details are not described herein；The intermediate harmonic cylinder front opening is connected to Inlet chamber, open rearward end are connected to discharge chamber, are connected in the intermediate harmonic cylinder between the middle resonant cavity in centre Multiple intermediate harmonic holes are set on resonance cylinder cylinder；Engine exhaust enters inlet chamber by air inlet pipe, is passed through by inlet chamber Between resonance cylinder enter, the intracavitary gas (pass through exhaust formation) with certain pressure of intermediate harmonic, intermediate harmonic cylinder passes through centre Resonance hole is expelled to middle resonant cavity (between front baffle and rear bulkhead) and frequency has superposition thus and middle resonant cavity Interior gas interaction can be each intermediate harmonic gas inlet hole exhaust and occur or occur simultaneously, generates better effects Resonance, thus further noise reduction damping；Also, it (can also be formed humorous with inlet chamber (also forming resonance) and discharge chamber Vibration) it cooperates, it is further ensured that noise reduction, while ensure that environmental protection, using the resonance effect of exhaust itself, is additionally favorable for improving The operational efficiency of engine.

Further, interior resonance component further includes the corresponding intermediate harmonic cylinder for being supported in the front baffle and rear bulkhead in both ends, As shown, intermediate harmonic cylinder both ends may pass through the front baffle and rear bulkhead and form support, certainly, circumferencial direction needs shape At sealing (welding), details are not described herein；The intermediate harmonic cylinder front opening is connected to preceding resonant cavity, and open rearward end is connected to Resonant cavity afterwards, be connected in the intermediate harmonic cylinder be arranged on intermediate harmonic cylinder cylinder between the middle resonant cavity it is multiple Intermediate harmonic hole, the exhaust gas being discharged by air inlet resonance tube body resonance form resonance in preceding resonant cavity first and enter intermediate harmonic Cylinder, the intracavitary gas (being formed by exhaust) with certain pressure of intermediate harmonic, intermediate harmonic cylinder is discharged by intermediate harmonic hole The gas intracavitary to middle resonant cavity (between front baffle and rear bulkhead) and detour and intermediate harmonic interacts, and can be Each intermediate harmonic gas inlet hole exhaust occurs or occurs simultaneously, generates the resonance of better effects, so that further noise reduction subtracts Shake；Also, before entering exhaust pipe, the resonance of interior resonance component and air inlet resonance pipeline section cooperates, and is further ensured that drop It makes an uproar, while ensure that environmental protection, using the resonance effect of exhaust itself, is additionally favorable for improving the operational efficiency of engine.

Further, the intermediate harmonic hole be radial through-hole, and approaches uniformity be distributed in intermediate harmonic cylinder cylinder or By the distribution of intermediate harmonic cylinder cylinder blockette approaches uniformity within the scope of block；Similarly with the principle of air inlet resonance pipeline section, diameter It is conducive to processing to through-hole and is easily formed the bypass flow vertical with sprue, bypass flow has the function of forming resonance, from And advanced optimize resonance noise reduction effect；Approaches uniformity distribution refers to that the spacing between Kong Yukong is of substantially equal, allows to have one Fixed interval error refers to intermediate harmonic cylinder cylinder blockette easily manufactured not process intermediate harmonic near weld seam Hole, or intermediate harmonic cylinder cylinder is artificially divided into several blocks, intermediate harmonic hole is processed within the scope of block, it can be targetedly Resonance is formed, there is the noise reduction effect of setting.

Further, the intermediate harmonic cylinder is at least one, and the lumenal cross-section of intermediate harmonic cylinder accumulates summation and air inlet The ratio between lumenal cross-section product of resonance pipeline section is 1-1.5:1, preferably 1.2:1；Resonance is used to eliminate noise and the shake of silencer It is dynamic, in the present solution, the resonance that air inlet resonance pipeline section generates in air inlet resonant cavity influences whether posterior middle resonant cavity, Intermediate harmonic is intracavitary to continue resonance processing, can just be able to finally generate preferable effect；Meanwhile the circulation of intermediate harmonic pipe Ability also influences resonance effect of the air inlet resonance pipeline section in air inlet resonant cavity, therefore, in the present solution, intermediate harmonic cylinder with into Proportional region between gas resonatron between caliber (lumenal cross-section product) can guarantee the resonance effect of air inlet resonant cavity, together When, guarantee that middle resonant cavity there can be enough air inlets to form resonance.

Further, the intermediate harmonic cylinder is at least one, the multiple intermediate harmonic hole of single intermediate harmonic cylinder The ratio between lumenal cross-section product of perforated area summation and corresponding intermediate harmonic cylinder is 2.5-3.5:1；Similarly, middle resonant cavity The generation of resonance needs between intermediate harmonic cylinder internal gas flow and external pressure (middle resonant cavity) and by intermediate harmonic hole Outlet air inlet (under the action of resonance intracavity gas) ratio between it is reasonable cooperation to realize, the proportional region is bigger than normal Direct buffering noise reduction (resistant noise-reducing) is then formed, effect is directly the identical effect of existing resistant noise-reducing, it is less than normal, it completes Not comprehensive resonance effect resonance for being expected, or even resonance can not be formed.

Further, the intermediate harmonic cylinder is at least one, the multiple intermediate harmonic hole of single intermediate harmonic cylinder Perforated area summation accounts for the 20%-27% for being located at the intracavitary cylinder developed area of intermediate harmonic of intermediate harmonic cylinder；That expects is humorous Vibration effect needs enough perforated areas and cooperates with the length and caliber size of intermediate harmonic cylinder, if single pursuit aperture Area then will affect the integral strength of intermediate harmonic cylinder, it may occur that resonates and increases vibration and increase noise, if perforated area It is too small, then it can cannot achieve overall resonance, so that the effect finally expected be not achieved.

Further, the perforated area summation in the multiple intermediate harmonic hole of single intermediate harmonic cylinder and corresponding centre are humorous The ratio between lumenal cross-section product of vibration cylinder is 3:1, the perforated area summation in the multiple intermediate harmonic hole of single intermediate harmonic cylinder Account for be located at the intracavitary cylinder developed area of intermediate harmonic 23% of intermediate harmonic cylinder；Similarly, the area summation in air inlet resonance hole, Air inlet resonance pipeline section lumenal cross-section is long-pending (to need the fitting of length and inner cavity to reach above-mentioned ratio with air inlet resonance pipeline section developed area Example) between have reasonable structural parameters, can be only achieved aforementioned proportion, to reach optimal resonance noise reduction effect, and can protect Air inlet resonance pipeline section intensity itself is demonstrate,proved, avoids occurring vibration to influence whole noise elimination effect.

Further, the intermediate harmonic cylinder is the tubular of cross section rule, generally cylindrical cross section；And quantity is to be parallel to disappear Two or more is arranged in cylinder record body, and two or more intermediate harmonic cylinders are centered around around the longitudinal center line of noise elimination cylinder uniformly Distribution；The distance between central axis of adjacent intermediate harmonic cylinder is to arrive in the central axis of this side up adjacent intermediate harmonic cylinder 1.4-1.6 times of the sum of respective bus distance；The resonance of gas needs to have enough resonance spaces, but resonance space is excessive then It influences silencer overall volume or is inconvenient to arrange intermediate harmonic cylinder, it is too small, overall resonance can not be formed；This programme This direction refers to the direction of the vertical join line between the central axis of adjacent intermediate harmonic cylinder；Due to the diameter of intermediate harmonic cylinder It is not necessarily identical, but the distance between adjacent intermediate harmonic cylinder need to keep suitable range just and can guarantee with preferable resonance Noise reduction effect is not mutually of adverse effect；Preferably, intermediate harmonic cylinder is two and equal diameter cylinder, then this programme 1.4-1.6 times of the diameter that the distance between central axis of adjacent intermediate harmonic cylinder is intermediate harmonic cylinder can be stated as.

In the present solution, air inlet resonance hole, exhaust resonance hole and intermediate harmonic hole are circular hole, diameter is respectively 5-7mm, 5- 7mm and 6-8mm, and the aperture in intermediate harmonic hole should be greater than air inlet resonance hole and be vented the aperture in resonance hole.

The invention also discloses a kind of generating set, it is humorous that the engine of the generating set is equipped with the porous exhaust Shake squelch type silencer.

The beneficial effects of the present invention are: porous exhaust resonance squelch type silencer of the invention and generating set, exhaust pipe Sealing insertion noise elimination cylinder lumen forms exhaust resonance pipeline section, and in exhaust resonance pipeline section medial end closing, side wall is provided with company Multiple exhaust resonance hole inside and outside logical exhaust resonance pipeline section, during engine exhaust, elimination is pressed, disappearing with porous plate Sound and buffering effect, after engine exhaust enters exhaust resonance pipeline section by exhaust resonance hole, with the intracorporal pressure gas of silencing pot Between body and exhaust resonance pipeline section is interior since the previous bias power frequency formed that is vented has superposition to have regular mutual Effect realizes noise-and-vibration-reduction, and since the resonance of rule makes engine exhaust suitable to generate the regular resonance of better effects Silencer and engine operating efficiency freely are improved, reaches energy-efficient purpose；In actual use, can with intermediate buffering resonance, Air inlet resonance forms cooperation, is further ensured that noise reduction muting function, is conducive to environmental protection；Meanwhile acoustic wave filter structure of the invention is simple, Simply processed using existing profile it is i.e. plastic, and can according to the flexible in size of engine displacement change size, and keep knot Structure is constant, has stronger adaptability.

Detailed description of the invention

The invention will be further described with reference to the accompanying drawings and examples:

Fig. 1 is the relatively simple acoustic wave filter structure schematic diagram of the prior art；

Fig. 2 is structural schematic diagram of the invention；

Fig. 3 be Fig. 2 along D-D to cross-sectional view；

Fig. 4 is enlarged drawing at Fig. 2A；

Fig. 5 is enlarged drawing at Fig. 2 B；

Fig. 6 is enlarged drawing at Fig. 2 C；

Fig. 7 is the structure chart that the present invention is used for engine；

Fig. 8 is the structure chart that the present invention is used for generating set.

Specific embodiment

As shown, the silencer in the present embodiment, including air inlet pipe 1, exhaust pipe 2 and noise elimination cylinder 3, the exhaust pipe 2 sealing insertion noise elimination cylinders and insertion pipeline section are exhaust resonance pipeline section 201, and exhaust 201 medial end of resonance pipeline section closing is such as schemed It is shown, it is formed and is closed by blind plate 203, exhaust 201 side wall of resonance pipeline section is provided with more inside and outside connection exhaust resonance pipeline section A exhaust resonance hole；It is vented 201 sections of side walls of resonatron and is equipped with exhaust resonance hole 202, during engine exhaust, in Between 4 resonance of resonance cylinder row come this exhaust gas by exhaust resonance hole from laterally enter exhaust resonance pipeline section 201 in, from Dynamic exhaust gas overlap the resonance of pests occurrence rule in frequency more than the institute in exhaust pipe with last time row, has and preferably buffers resonance and imitate Fruit reduces exhaust resistance and improves engine efficiency, further decrease exhaust noise, is conducive to environmentally friendly and effective energy conservation.

It in embodiment, cooperates with exhaust pipe-shaped at resonance, the sealing of air inlet pipe 1 is inserted into noise elimination cylinder lumen and is inserted Entering pipeline section is air inlet resonance pipeline section 101, and 101 medial end of the air inlet resonance pipeline section closing, side wall is provided with connection air inlet resonance Multiple air inlet resonance hole inside and outside pipeline section, medial end refer to that details are not described herein positioned at the end of noise elimination inner barrel；Into Tracheae 1 and exhaust pipe 2 are connected to noise elimination cylinder 3 according to gas flow, and air inlet pipe, noise elimination cylinder and the usual structure of exhaust pipe are equal It is circular tubular structure for cross section, mounting structure also belongs to the usual structure of silencer, and details are not described herein；Air inlet resonance Pipeline section is equipped with air inlet resonance hole, and during engine exhaust, the gas of this exhaust enters noise elimination by air inlet resonance hole In cylinder, was arranged automatically with last time and overlap generation resonance in frequency in more than intracorporal exhaust gas of silencing pot, there is preferable buffering Resonance effect reduces exhaust resistance and improves engine efficiency, resistance noise reduction used in the prior art is combined when use The structure of device, further decreases exhaust noise, is conducive to environmentally friendly and effective energy conservation.

In the present embodiment, air inlet resonance hole 102 is radial through-hole, and approaches uniformity is distributed in air inlet resonance pipeline section Or by the distribution of air inlet resonance pipeline section blockette approaches uniformity within the scope of block；Radial through-hole is conducive to processing and is easily formed The bypass flow vertical with sprue, bypass flow have the function of forming resonance, to advanced optimize resonance noise reduction effect； Approaches uniformity distribution refers to the interval error that the spacing between Kong Yukong is of substantially equal, allows to have certain, by air inlet resonatron Section blockette refers to the easily manufactured not processing gas inlet resonance hole near weld seam, or artificially by air inlet resonance pipeline section point At several blocks, the processing gas inlet resonance hole within the scope of block can targetedly form resonance, have the noise reduction effect of setting.

In the present embodiment, the perforated area summation in the multiple air inlet resonance hole 102 and 101 inner cavity of air inlet resonance pipeline section are horizontal The ratio between sectional area is 1.5-2.5:1；The generation of resonance needs air inlet resonance inner tube segment air-flow and external pressure (noise reduction cylinder It is interior) between and pass through resonance detour air inlet resonance hole occur resonance air-flow and air inlet resonance hole 102 discharge air-flow ratio Between reasonable cooperation to realize, the aforementioned proportion range is bigger than normal then to form direct buffering noise reduction (resistant noise-reducing), obtains To effect also can only be directly for existing resistant noise-reducing effect, it is less than normal, it is humorous to can not be completed the comprehensive resonance effect expected Vibration, or even resonance can not be formed.

In the present embodiment, the perforated area summation in the multiple air inlet resonance hole 102 accounts for 101 developed surface of air inlet resonance pipeline section Long-pending 25%-40%；The resonance effect of expectation needs enough perforated areas and cooperates with the length and pipe of air inlet resonance pipeline section Diameter size, if single pursuit perforated area, will affect the integral strength of air inlet resonance pipeline section, it may occur that resonance fracture and To increase vibration and increase noise if perforated area is too small can cannot achieve overall resonance, finally expect to be not achieved Effect.

In the present embodiment, the perforated area summation in the multiple air inlet resonance hole 102 and 101 inner cavity of air inlet resonance pipeline section are horizontal The ratio between sectional area is 2:1, and the perforated area summation in the multiple air inlet resonance hole 102 accounts for 101 developed area of air inlet resonance pipeline section 30%；The area summation in air inlet resonance hole, air inlet resonance pipeline section lumenal cross-section are long-pending (to be needed with air inlet resonance pipeline section developed area Want the fitting of length and inner cavity to reach aforementioned proportion) between have reasonable structural parameters, can be only achieved aforementioned proportion, to reach It to optimal resonance noise reduction effect, and can guarantee air inlet resonance pipeline section intensity itself, avoid that vibration occurs to influence whole disappear Sound effective value.

In the present embodiment, the noise elimination cylinder 3 is the tubular of cross section rule, generally cylindrical cross section, and cross section is circle, The air inlet resonance pipeline section 101 is along the direction insertion perpendicular to 3 longitudinal center line of noise elimination cylinder and insertion depth is to eliminate the noise Longitudinal center line near the longitudinal center line of cylinder or more than noise elimination cylinder, but noise elimination cylinder is not to be exceeded in total intubating length Inner cavity in this direction total length 60%；I.e. the depth of air inlet resonance pipeline section insertion noise elimination cylinder has obviously to resonance is formed Influence, insertion range it is big, conducive to the intracorporal a wide range of resonance of chamber is formed, but range is excessive, will affect air inlet resonance pipeline section The exhaust of air inlet resonance hole, causes bigger noise and vibration, and therefore, the insertion depth of optimum range is that 3 inner cavity of noise elimination cylinder exists The 56-58% or so of total length in this direction, the exhaust of air inlet resonance pipeline section 101 form turning movement and participate in air inlet resonance hole outlet Resonance, it can be achieved that entire air inlet section resonance, finally realize noise reduction effect.

Further include being located at the endoceliac interior resonance component of silencing pot in the present embodiment, the interior resonance component include it is preceding every Plate 5 and rear bulkhead 6, the front baffle 5 and rear bulkhead 6 are sealed at noise elimination cylinder lumen side by side according to gas flow front and back, Sealed set refers to that front baffle and rear bulkhead are forming sealing (such as welding) between circle in circumferencial direction and silencing pot body；And Noise elimination cylinder lumen is separated into the air inlet resonant cavity before front baffle I by front baffle 5 and rear bulkhead 6, be located at front baffle 5 and after Middle resonant cavity II between partition 6 and the exhaust resonant cavity III after rear bulkhead, the middle resonant cavity is by air inlet resonance Chamber row to be discharged into exhaust resonant cavity after exhaust gas forms resonance；The air inlet pipe is connected to air inlet resonance by air inlet resonance pipeline section Chamber, exhaust pipe are connected to exhaust resonant cavity；Interior resonance component is located at after air inlet resonance pipeline section, holds jointly with air inlet resonance pipeline section The continuous resonance of continuous completion guarantees whole resonance noise reduction effect；Middle resonant cavity has resonance effect, and this resonance can be with It is to be also possible to realize that details are not described herein by device hardware (such as labyrinth structure etc.) by the way that resonance hole is arranged.

In the present embodiment, interior resonance component, which further includes that both ends are corresponding, is supported in the front baffle 5 and the centre of rear bulkhead 6 is humorous Vibration cylinder 4, as shown, 4 both ends of intermediate harmonic cylinder may pass through the front baffle 5 and rear bulkhead 6 and form support, certainly, circumference Direction needs to form sealing (welding), and details are not described herein；4 front opening of intermediate harmonic cylinder is connected to preceding resonant cavity I, after End opening is connected to rear resonant cavity III, is connected in the intermediate harmonic cylinder 4 between the middle resonant cavity II intermediate humorous Multiple intermediate harmonic holes 401 are set on vibration cylinder cylinder, and the exhaust gas being discharged by 101 resonance of air inlet resonance tube body is first in preceding resonance Chamber I forms resonance and enters intermediate harmonic cylinder 4, the gas (being formed by exhaust) in middle resonant cavity II with certain pressure, Intermediate harmonic cylinder 4 by intermediate harmonic hole 401 be expelled to middle resonant cavity (positioned at front baffle and rear bulkhead between) and detour and The intracavitary gas interaction of intermediate harmonic can be each intermediate harmonic gas inlet hole exhaust and occur or occur simultaneously, produces The resonance of raw better effects, thus further noise reduction damping；Also, before entering exhaust pipe, interior resonance component and air inlet are humorous The resonance of vibration tube section cooperates, and is further ensured that noise reduction, while ensure that environmental protection, using being vented itself resonance effect, It is additionally favorable for improving the operational efficiency of engine.

In the present embodiment, the intermediate harmonic hole 401 is radial through-hole, and approaches uniformity is distributed in intermediate harmonic cylinder cylinder Body or by the distribution of intermediate harmonic cylinder cylinder blockette approaches uniformity within the scope of block；It is same with the principle of air inlet resonance pipeline section Reason, radial through-hole are conducive to processing and are easily formed the bypass flow vertical with sprue, and bypass flow has the work for forming resonance With to advanced optimize resonance noise reduction effect；Approaches uniformity distribution refers to that the spacing between Kong Yukong is of substantially equal, allows There is certain interval error, intermediate harmonic cylinder cylinder blockette is referred to easily manufactured not process centre near weld seam Resonance hole, or intermediate harmonic cylinder cylinder is artificially divided into several blocks, intermediate harmonic hole is processed within the scope of block, can be directed to Property formation resonance, have setting noise reduction effect.

In the present embodiment, the intermediate harmonic cylinder 4 be at least one, and intermediate harmonic cylinder lumenal cross-section product summation with The ratio between lumenal cross-section product of air inlet resonance pipeline section is 1-1.5:1, preferably 1.2:1；Resonance is used to eliminate the noise of silencer And vibration, in the present solution, the resonance that air inlet resonance pipeline section generates in air inlet resonant cavity influences whether posterior intermediate harmonic Chamber handles in the intracavitary resonance that continues of intermediate harmonic, can just be able to finally generate preferable effect；Meanwhile intermediate harmonic pipe Negotiability also influence resonance effect of the air inlet resonance pipeline section in air inlet resonant cavity, therefore, in the present solution, intermediate harmonic Proportional region between cylinder and air inlet resonatron between caliber (lumenal cross-section product) can guarantee that the resonance of air inlet resonant cavity is imitated Fruit, meanwhile, guarantee that middle resonant cavity there can be enough air inlets to form resonance.

In the present embodiment, the intermediate harmonic cylinder 4 is at least one, and the multiple centre of single intermediate harmonic cylinder 4 is humorous The ratio between the lumenal cross-section product of perforated area summation and corresponding intermediate harmonic cylinder in hole of shaking is 2.5-3.5:1；Similarly, intermediate humorous The generation of the resonance of vibration chamber II needs between intermediate harmonic cylinder internal gas flow and external pressure (middle resonant cavity II) and passes through Reasonable cooperation between outlet air inlet (the under the action of resonance intracavity gas) ratio in intermediate harmonic hole 401 is described to realize Proportional region it is bigger than normal then form direct buffering noise reduction (resistant noise-reducing), effect is directly the identical effect of existing resistant noise-reducing Fruit, it is less than normal, it can not be completed the comprehensive resonance effect resonance expected, or even resonance can not be formed.

In the present embodiment, the intermediate harmonic cylinder be at least one, the multiple intermediate harmonic of single intermediate harmonic cylinder 4 The perforated area summation in hole accounts for the 20%-27% for being located at the intracavitary cylinder developed area of intermediate harmonic of intermediate harmonic cylinder；Expect Resonance effect need enough perforated areas and cooperate with the length and caliber size of intermediate harmonic cylinder, if single pursuit Perforated area then will affect the integral strength of intermediate harmonic cylinder, it may occur that resonates and increases vibration and increase noise, if aperture Area is too small, then can cannot achieve overall resonance, so that the effect finally expected be not achieved.

In the present embodiment, the perforated area summation in the multiple intermediate harmonic hole of single intermediate harmonic cylinder 4 with it is corresponding The ratio between lumenal cross-section product of intermediate harmonic cylinder is 3:1, the aperture face in the multiple intermediate harmonic hole of single intermediate harmonic cylinder 4 Product summation accounts for be located at the intracavitary cylinder developed area of intermediate harmonic 23% of intermediate harmonic cylinder；Similarly, the face in air inlet resonance hole Product summation, air inlet resonance pipeline section lumenal cross-section product (need the fitting of length and inner cavity to reach with air inlet resonance pipeline section developed area To aforementioned proportion) between there are reasonable structural parameters, can be only achieved aforementioned proportion, to reach optimal resonance noise reduction effect Fruit, and can guarantee air inlet resonance pipeline section intensity itself, avoid occurring vibration to influence whole noise elimination effect.

In the present embodiment, the intermediate harmonic cylinder 4 is the tubular of cross section rule, generally cylindrical cross section；And quantity is flat Two or more is arranged in noise elimination cylinder 3 in row, and the distance between central axis of adjacent intermediate harmonic cylinder 4 is in this side up phase 1.4-1.6 times of sum to respective bus distance of the central axis of adjacent intermediate harmonic cylinder；The resonance of gas needs to have enough Resonance space, but resonance space is excessive influences silencer overall volume or be inconvenient to and arranges intermediate harmonic cylinder, it is too small then without Method forms overall resonance；The vertical join line between the central axis that this direction refers to adjacent intermediate harmonic cylinder of this programme Direction；Since the diameter of intermediate harmonic cylinder is not necessarily identical, but the distance between adjacent intermediate harmonic cylinder need to keep suitable Range just can guarantee with preferable resonance noise reduction effect, not be mutually of adverse effect；Preferably, intermediate harmonic cylinder 4 is Two and equal diameter cylinder, then this programme can state the distance between central axis of adjacent intermediate harmonic cylinder as centre 1.4-1.6 times of the diameter of resonance cylinder.

In the present embodiment, it is that exhaust is humorous that the sealing of exhaust pipe 2, which is inserted into discharge chamber III and is vented resonant cavity and insertion pipeline section, Vibration tube section 201.

In the present embodiment, the exhaust resonance hole 202 is radial through-hole, and being distributed in for approaches uniformity is vented resonance pipeline section 201 or will be vented 201 blockette of resonance pipeline section approaches uniformity within the scope of block distribution；Radial through-hole be conducive to processing and easily In forming the bypass flow vertical with sprue, bypass flow has the function of forming resonance, to advanced optimize resonance drop It makes an uproar effect；Approaches uniformity distribution refers to the interval error that the spacing between Kong Yukong is of substantially equal, allows to have certain, will be vented Resonance pipeline section blockette refers to easily manufactured do not process near weld seam and is vented resonance hole, or will artificially be vented resonance Pipeline section is divided into several blocks, and the processing gas inlet resonance hole within the scope of block can targetedly form resonance, has the noise reduction of setting Effect.

In the present embodiment, the perforated area summation in the multiple exhaust resonance hole 202 and exhaust 201 inner cavity of resonance pipeline section are horizontal The ratio between sectional area is 1.5-2.5:1, is vented the lumenal cross-section area of resonance pipeline section 201 and the inner cavity of air inlet resonance pipeline section 101 The ratio between cross-sectional area is 1.5-1.6:1；The generation of resonance needs to be vented resonance inner tube segment air-flow and external pressure (hush pipe Between in vivo) and by resonance detour be vented resonance hole occur resonance air-flow and exhaust resonance hole discharge air-flow ratio it Between it is reasonable cooperation to realize, the aforementioned proportion range is bigger than normal, forms direct exhaust resistance, is formed at exhaust pipe Noise, it is less than normal, it can not be completed the comprehensive resonance effect resonance expected, or even resonance can not be formed；Meanwhile with air inlet resonance Pipeline section 101 matches coordination, and then matches with the parameter of intermediate harmonic cylinder, forms lasting resonance effect.

In the present embodiment, the perforated area summation in the multiple exhaust resonance hole 202 accounts for exhaust 201 developed surface of resonance pipeline section Long-pending 25%-40%；The resonance effect of expectation needs enough perforated areas and cooperates to be vented the length and pipe of resonance pipeline section Diameter size, if single pursuit perforated area, will affect exhaust resonance pipeline section integral strength, it may occur that resonance fracture and To increase vibration and increase noise if perforated area is too small can cannot achieve overall resonance, finally expect to be not achieved Effect.

In the present embodiment, the perforated area summation in the multiple exhaust resonance hole 202 and exhaust 201 inner cavity of resonance pipeline section are horizontal The ratio between sectional area is 2:1, and the perforated area summation in the multiple exhaust resonance hole 202 accounts for exhaust 201 developed area of resonance pipeline section 30%；It is vented the area summation in resonance hole, exhaust resonance pipeline section lumenal cross-section product (is needed with exhaust resonance pipeline section developed area Want the fitting of length and inner cavity to reach aforementioned proportion) between have reasonable structural parameters, can be only achieved aforementioned proportion, to reach It to optimal resonance noise reduction effect, and can guarantee air inlet resonance pipeline section intensity itself, avoid that vibration occurs to influence whole disappear Sound effective value；Certainly, there is common association between the above-mentioned parameter between air inlet resonance pipeline section, intermediate harmonic cylinder and exhaust resonance pipeline section It adjusts, by air inlet to final exhaust successively sequence resonance buffering exhaust, reaches final buffering resonance noise reduction effect.

In the present embodiment, the noise elimination cylinder 3 is the tubular of cross section rule, and the exhaust resonance pipeline section 201 is along vertical Near the longitudinal center line that the direction of the noise elimination cylinder longitudinal center line is inserted into and insertion depth is noise elimination cylinder 3 or it is more than The longitudinal center line of noise elimination cylinder, but noise elimination cylinder lumen total length in this direction is not to be exceeded in total intubating length 60%；I.e. the depth of exhaust resonance pipeline section insertion noise elimination cylinder influences formation resonance with apparent, and insertion range is big, is conducive to The intracorporal a wide range of resonance of chamber is formed, but range is excessive, will affect the exhaust resonance hole resonance exhaust of exhaust resonance pipeline section, make The noise of Cheng Geng great and vibration, therefore, the insertion depth of optimum range are the 56- of noise elimination cylinder lumen total length in this direction 58% or so, there is turning movement to participate in the resonance of exhaust resonance hole outlet, it can be achieved that whole in the exhaust resonance hole for being vented resonant section The resonance of a exhaust section, finally realizes noise reduction effect.

In the present embodiment, 3 inner surface of noise elimination cylinder is provided with the absorbent treatment 7 with a thickness of 25-35mm, certainly, sound absorption The setting of layer 7 needs the inner cylinder with sound-absorbing hole 8 to fix absorbent treatment, and details are not described herein；As shown, in the present embodiment, Absorbent treatment is provided only on middle resonant cavity；The setting of absorbent treatment is so that this programme formation impedance composite muffler structure, reaches Optimal noise reduction effect, also, absorbent treatment thickness is much smaller than the prior art, so that silencer cost of the invention reduces, weight Mitigate, and reduces the maintenance cost in later period.

In the present embodiment, the noise elimination cylinder 3 is the tubular of cross section rule, and generally circular in cross section cylinder, cross section is circle； The air inlet resonance pipeline section 101 and exhaust resonance pipeline section 102 are inserted along the direction perpendicular to the noise elimination cylinder longitudinal center line Enter and insertion depth be near the longitudinal center line of noise elimination cylinder or be more than longitudinal center line, in the present embodiment, insertion depth It is the 57.7% of the internal diameter of noise elimination cylinder, there is preferable resonance effect；3 front-end and back-end of noise elimination cylinder are all closed, into Gas resonance pipeline section 101 is left for the half of lateral dimension of the air inlet resonance pipeline section on this direction at a distance from 3 front end of noise elimination cylinder The right side, the one of the lateral dimension for being vented resonance pipeline section 201 at a distance from 3 rear end of noise elimination cylinder for exhaust resonance pipeline section on this direction Half left and right, here apart from benchmark be pipeline section outer surface；Since air inlet resonance pipeline section 101 and exhaust resonance pipeline section 201 are circle Tubular, thus it is above-mentioned the half of lateral dimension or so that this side up refer to air inlet resonance pipeline section and exhaust resonance pipeline section Radius, details are not described herein；Air inlet resonance pipeline section and silencer front end and exhaust resonance pipeline section and silencer in this programme The distance of rear end is to form one of the condition of resonance and buffering, so as to avoid the direct Contact -impact of exhaust and end, certainly, Apart from excessive, resonance buffering can not be formed, the increase of exhaust noise is avoided.

In the present solution, air inlet resonance hole 102, exhaust resonance hole 202 and intermediate harmonic hole 401 are circular hole, diameter difference Aperture for 5-7mm, 5-7mm and 6-8mm, and intermediate harmonic hole should be greater than air inlet resonance hole and be vented the aperture in resonance hole, this In embodiment, air inlet resonance hole, exhaust resonance hole and intermediate harmonic hole are circular hole, and diameter is respectively 6mm, 6mm and 7mm.

In actual use, middle resonant cavity is approximately located i the middle part of noise elimination cylinder, and length dimension accounts for about noise elimination barrel lenght Half；The diameter of air inlet resonance pipeline section should be no more than the 10% of noise elimination barrel lenght；The diameter of exhaust resonance pipeline section should be greater than The diameter of air inlet resonance pipeline section, but it is generally higher than about a quarter.

The internal diameter of noise elimination cylinder is typically about the 30-40% of its axial length, belongs to existing structure design, herein no longer It repeats.

The invention also discloses a kind of generating set, it is quiet that the engine of the generating set is provided with the porous resonance Sound formula silencer, as shown in Figure 7, Figure 8, silencer of the invention are mounted on engine 15, and engine 15 is used for driven generator 16, form complete generating set.

Following table is the acoustic pressure according to the silencer of the optimal size proportion structure of the present embodiment under different silencer states The test result of grade and sound deadening capacity: following three table:

Table one (only begin to rehearse gas resonance hole)

Table two (opens intermediate harmonic hole and exhaust resonance hole)

Mark three (drives gas resonance hole, intermediate harmonic hole and exhaust resonance hole into)

Sound deadening capacity is the main indicator for evaluating silencer acoustic efficiency, and commonly using insertion loss indicates.Insertion loss, which refers to, " is System " loads onto that silencer is forward and backward, respectively from sound source it is same with a distance from, the sound measured on the measuring point of same direction, same acoustic enviroment Grade difference, sound deadening capacity are bigger；This programme state silencer sound deadening capacity is up to 35.8dB (A), and sound deadening capacity disappears than conventional silencer The big 10dB (A) of volume (25dB) is more；Pressure drop of the program silencer under stand-by operating condition is 1.6KPa, meets silencer pressure It is reduced to the requirement of 10kPa, design is reasonable.

Finally, it is stated that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although referring to compared with Good embodiment describes the invention in detail, those skilled in the art should understand that, it can be to skill of the invention Art scheme is modified or replaced equivalently, and without departing from the objective and range of technical solution of the present invention, should all be covered at this In the scope of the claims of invention.

Claims (16)

1. a kind of porous exhaust resonance squelch type silencer, it is characterised in that: including air inlet pipe, exhaust pipe and noise elimination cylinder, institute Exhaust seal of tube insertion noise elimination cylinder and insertion pipeline section are stated to be vented resonance pipeline section, the exhaust resonance pipeline section medial end envelope It closes, side wall is provided with multiple exhaust resonance hole inside and outside connection exhaust resonance pipeline section.

2. porous exhaust resonance squelch type silencer according to claim 1, it is characterised in that: the exhaust resonance hole is Radial through-hole, and being distributed in for approaches uniformity is vented resonance pipeline section or exhaust resonance pipeline section blockette is close within the scope of block Like uniform distribution.

3. porous exhaust resonance squelch type silencer according to claim 2, it is characterised in that: the multiple exhaust resonance The ratio between the perforated area summation and exhaust resonance pipeline section lumenal cross-section product in hole are 1.5-2.5:1；The exhaust resonance pipeline section The lumenal cross-section area ratio of lumenal cross-section area and air inlet resonance pipeline section is 1.5-1.6:1.

4. porous exhaust resonance squelch type silencer according to claim 2, it is characterised in that: the multiple exhaust resonance The perforated area summation in hole accounts for the 25%-40% of exhaust resonance pipeline section developed area.

5. porous exhaust resonance squelch type silencer according to claim 4 or 5, it is characterised in that: the multiple exhaust The ratio between the perforated area summation and exhaust resonance pipeline section lumenal cross-section product in resonance hole are 2:1, the multiple exhaust resonance hole Perforated area summation accounts for the 30% of exhaust resonance pipeline section developed area.

6. porous exhaust resonance squelch type silencer according to claim 1,2,3 or 4, it is characterised in that: the noise elimination Cylinder is the tubular of cross section rule, and the exhaust resonance pipeline section is along the direction perpendicular to the noise elimination cylinder longitudinal center line Insertion and insertion depth are the longitudinal center line near the longitudinal center line of noise elimination cylinder or more than noise elimination cylinder.

7. porous exhaust resonance squelch type silencer according to claim 1,2,3 or 4, it is characterised in that: the noise elimination Cylinder is the tubular of cross section rule and front-end and back-end are all closed, and being vented resonance pipeline section at a distance from noise elimination cylinder back-end is row The half of lateral dimension or so of the gas resonance pipeline section on this direction.

8. porous exhaust resonance squelch type silencer according to claim 1,2,3 or 4, it is characterised in that: further include position In the endoceliac interior resonance component of silencing pot, the interior resonance component includes front baffle, rear bulkhead and intermediate harmonic cylinder, before described Noise elimination cylinder lumen is separated into according to being sealed at noise elimination cylinder lumen side by side before and after gas flow by partition and rear bulkhead Before front baffle and after being connected to the inlet chamber of air inlet pipe, the middle resonant cavity between front baffle and rear bulkhead and being located at every After plate and the discharge chamber of connection exhaust pipe, intermediate harmonic cylinder both ends correspondence are supported in the front baffle and rear bulkhead；It is described Intermediate harmonic cylinder front opening is connected to inlet chamber, and open rearward end is connected to discharge chamber, be connected in the intermediate harmonic cylinder with Multiple intermediate harmonic holes are set on intermediate harmonic cylinder cylinder between the middle resonant cavity.

9. porous exhaust resonance squelch type silencer according to claim 8, it is characterised in that: the intermediate harmonic hole is Radial through-hole, and approaches uniformity is distributed in intermediate harmonic cylinder cylinder or by intermediate harmonic cylinder cylinder blockette in block range The distribution of interior approaches uniformity.

10. porous exhaust resonance squelch type silencer according to claim 8, it is characterised in that: the intermediate harmonic cylinder For at least one, and intermediate harmonic cylinder lumenal cross-section product summation and air inlet pipe insertion inlet chamber pipeline section lumenal cross-section product The ratio between be 1-1.5:1.

11. porous exhaust resonance squelch type silencer according to claim 10, it is characterised in that: the intermediate harmonic cylinder For at least one, the perforated area summation in the multiple intermediate harmonic hole of single intermediate harmonic cylinder and corresponding intermediate harmonic cylinder Lumenal cross-section product the ratio between be 2.5-3.5:1.

12. porous exhaust resonance squelch type silencer according to claim 11, it is characterised in that: the intermediate harmonic cylinder For at least one, the perforated area summation in the multiple intermediate harmonic hole of single intermediate harmonic cylinder accounts for being located at for intermediate harmonic cylinder The 20%-27% of the intracavitary cylinder developed area of intermediate harmonic.

13. porous exhaust resonance squelch type silencer according to claim 12, it is characterised in that: single intermediate harmonic cylinder The ratio between the lumenal cross-section product of perforated area summation and corresponding intermediate harmonic cylinder in the multiple intermediate harmonic hole be 3:1, What the perforated area summation in the multiple intermediate harmonic hole of single intermediate harmonic cylinder accounted for intermediate harmonic cylinder is located at middle resonant cavity The 23% of interior cylinder developed area.

14. porous exhaust resonance squelch type silencer according to claim 8, it is characterised in that: the intermediate harmonic cylinder For the tubular of cross section rule, and quantity is to be parallel to noise elimination cylinder two or more, the center of adjacent intermediate harmonic cylinder is arranged The distance between axis be this side up adjacent intermediate harmonic cylinder central axis to respective bus distance sum 1.4-1.6 Times.

15. porous exhaust resonance squelch type silencer according to claim 14, it is characterised in that: in the silencing pot body The absorbent treatment that surface is provided with a thickness of 25-35mm.

16. a kind of generating set, it is characterised in that: the engine of the generating set is equipped with any right of claim 1-15 It is required that the porous exhaust resonance squelch type silencer.