CN204783177U - Diesel generating set silencer of discharging fume - Google Patents
Diesel generating set silencer of discharging fume Download PDFInfo
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- CN204783177U CN204783177U CN201520445455.4U CN201520445455U CN204783177U CN 204783177 U CN204783177 U CN 204783177U CN 201520445455 U CN201520445455 U CN 201520445455U CN 204783177 U CN204783177 U CN 204783177U
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Abstract
The utility model discloses a diesel generating set silencer of discharging fume in diesel generating set field, including the urceolus, the both ends of urceolus be equipped with respectively with the discharge fume import and the export of discharging fume that the urceolus is coaxial, be equipped with the hindering nature noise eliminator rather than coaxial setting in the urceolus, be equipped with among the hindering nature noise eliminator with hindering nature noise eliminator axial direction parallel, and the porous noise elimination structure of both ends open -ended, hindering nature noise eliminator with it forms import resistance noise elimination chamber to discharge fume between the import, hindering nature noise eliminator with it forms export resistance noise elimination chamber to discharge fume between the export. Its technological effect is: the advantage of having synthesized reactive muffler and dissipative muffler reaches simultaneously and carries out the effect of eliminating the noise to the frequency range internal noise sound wave of high, medium and low frequency, simultaneously with low costs, small, the quality light, simple structure, handling ease, installation and maintenance.
Description
Technical field
The utility model relates to a kind of diesel generating set smoke-discharging noise elimination device in diesel generating set field.
Background technique
The harm of noise is many-sided, such as damages hearing, impact is slept, induces an illness, disturbed language discourse; Noise strong especially also can affect equipment and run well, and damages building structure etc.Diesel generating set smoke evacuation noise is that diesel engine noise energy is maximum, the part that composition is maximum.Its fundamental frequency is the ignition frequency of cluster engine, should present the extension of fundamental frequency and higher harmonics thereof in whole smoke evacuation noise spectrum.Noise contribution mainly contains following several: one is the low frequency pulsating noise periodically caused by smoke evacuation; Two is the air column resonance noises in gas exhaust duct; Three is helmholtz resonance noises of diesel generating set cylinder; Four be high velocity air pass through to discharge fume the pipeline of knocker gap and complications time the jet noise that produces; Five is eddy current cracks; Six is regenerated noises that purging system produces under overpressure wave excitation, and eddy current crack and regenerated noise define continuity high-frequency noise spectrum, and the frequency in this continuity high-frequency noise spectrum increases with airspeed and significantly improves.
Adopt a dissipative muffler and a reactive muffler to connect in the past and just can reach the technique effect of noise in high, medium and low frequency range in decay diesel generating set smoke evacuation eliminated noise.Dissipative muffler mainly utilizes its internal porous noise elimination structure to remove the sound wave of smoke evacuation noise high-frequency noises, and makes it dissipate with form of heat.Acoustic impedance when reactive muffler mainly utilizes noise sound wave to pass in and out reactive muffling chamber do not mate and the reflection that produces and interference effect to eliminate the sound wave of Middle and low frequency noise.
Model utility content
The purpose of this utility model is to overcome the deficiencies in the prior art, a kind of diesel generating set smoke-discharging noise elimination device is provided, combine the advantage of reactive muffler and dissipative muffler, reach the effect that in the frequency range to high, medium and low frequency, noise sound wave is eliminated the noise simultaneously, cost is low simultaneously, volume is little, quality is light, structure is simple, is convenient to processing, installs and maintenance.
A kind of technological scheme realizing above-mentioned purpose is: a kind of diesel generating set smoke-discharging noise elimination device, comprises urceolus, and the two ends of described urceolus are respectively equipped with the smoke evacuation import coaxial with described urceolus and discharge fume and export;
Be provided with coaxial resistance noise reduction device arranged with it in described urceolus, be provided with in described resistance noise reduction device and described resistance noise reduction device parallel to an axis, and the porous noise elimination structure of both ends open;
Import reactive muffling chamber is formed between described resistance noise reduction device and described smoke evacuation import;
Formed between described resistance noise reduction device and described smoke evacuation export and export reactive muffling chamber.
Further, heat-resisting acoustical mineral packed layer is filled with in described resistance noise reduction device, and some axis along described resistance noise reduction device run through described heat-resisting acoustical mineral packed layer and the inner core of both ends open, the hole wall of described inner core is evenly equipped with noise elimination through hole, the porous noise elimination structure described in formation.
Further, described inner core by punching roll of steel plate around forming.
Further, described inner core is uniform in described resistance noise reduction device.
Further, what fill in described heat-resisting acoustical mineral packed layer is mineral cotton.
Further, the inner core described in several is more than or equal to described smoke evacuation import at A-A section area upwards in A-A section area sum upwards.
Further, described smoke evacuation import and described smoke evacuation outlet are connected to flange.
Further, the bottom in described outlet reactive muffling chamber has a drain opening.
Further, described import reactive muffling chamber is greater than described smoke evacuation import at A-A section area upwards at A-A section area upwards; Described outlet reactive muffling chamber is greater than described smoke evacuation outlet at A-A section area upwards at A-A section area upwards.
Have employed the technological scheme of a kind of diesel generating set smoke-discharging noise elimination device of the present utility model, comprise urceolus, the two ends of described urceolus are respectively equipped with the smoke evacuation import coaxial with described urceolus and discharge fume and export; Be provided with coaxial resistance noise reduction device arranged with it in described urceolus, be provided with in described resistance noise reduction device and described resistance noise reduction device parallel to an axis, and the porous noise elimination structure of both ends open; Form import reactive muffling chamber between described resistance noise reduction device and described smoke evacuation import, formed between described resistance noise reduction device and described smoke evacuation export and export reactive muffling chamber.Its technique effect is: the advantage combining reactive muffler and dissipative muffler, reach the effect that in the frequency range to high, medium and low frequency, noise sound wave is eliminated the noise simultaneously, cost is low simultaneously, volume is little, quality is light, structure is simple, is convenient to processing, installs and maintenance.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of diesel generating set smoke-discharging noise elimination device of the present utility model.
Embodiment
Refer to Fig. 1, inventor of the present utility model, in order to understand the technical solution of the utility model better, below by embodiment particularly, and is described in detail by reference to the accompanying drawings:
Refer to Fig. 1, a kind of diesel generating set smoke-discharging noise elimination device of the present utility model comprises closed at both ends, columniform urceolus 1, two end faces of the axis of urceolus 1 is respectively equipped with the smoke evacuation import 11 coaxial with urceolus 1 and outlet 12 of discharging fume.Wherein the smoke evacuation import 11 of urceolus 1 connects inlet flange 2, and smoke evacuation outlet connects exhaust flange 3, so that the installation of this diesel generating set smoke-discharging noise elimination device.
Be provided with in urceolus 1 one with the resistance noise reduction device 4 of its parallel to an axis, form import reactive muffling chamber 5 between resistance noise reduction device 4 and smoke evacuation import 11, formed between resistance noise reduction device 4 and smoke evacuation outlet 12 and export reactive muffling chamber 6.
Wherein, import reactive muffling chamber 5 is greater than smoke evacuation import 11 at A-A section area upwards at A-A section area upwards.The object of such design is: due to import reactive muffling chamber 5 A-A section area be upwards greater than smoke evacuation import 11 at A-A section area upwards, by smoke evacuation import 11 A-A section area upwards and reactive muffling chamber 5 uprushing between A-A section area upwards, when noise enters import reactive muffling chamber 5 with the air-flow of discharging fume from the smoke-ejecting pipe be connected with inlet flange 2, there occurs and do not mate due to acoustic impedance and the reflection produced and interference effect, reach the object of attenuate acoustic noise.Thus the part that decayed is to extraradial noise energy.
The shape of resistance noise reduction device 4 is also cylindrical, and fit with the madial wall of urceolus 1, resistance noise reduction device 4 and urceolus 1 are coaxially arranged, and are filled with heat-resisting acoustical mineral packed layer 42 in resistance noise reduction device 4, and what fill in heat-resisting acoustical mineral packed layer 42 is mineral cotton.Be provided with several in resistance noise reduction device 4 and axially run through resistance noise reduction device 4 along resistance noise reduction device 4, and the inner core 41 of both ends open, inner core 41 is rolled by punching steel plate and forms.This several inner cores 41 are the circumference uniform distributions around resistance noise reduction device 41 in resistance noise reduction device 4.These several inner cores 41 A-A section area sum be upwards smoke evacuation import 11 A-A upwards section area 100% ~ 110%.Adopt some effectively can eliminate the high-frequency noise by inner core 41 at the little inner core 41 of A-A section area upwards, prevent single inner core 41 excessive at A-A section area upwards and the high frequency that causes lost efficacy.Adopt some little at A-A section area upwards, and tube wall is evenly equipped with the inner core 41 of noise elimination through hole (not shown), the noise elimination through hole on high-frequency noise and inner core 41 tube wall can be made, and heat-resisting acoustical mineral packed layer 42 oscillating contact outside described noise elimination through hole forms sound piston, due to surface friction drag and viscous resistance, make a part of acoustic energy be converted into heat energy and lose, consume noise energy.
When the sound wave of noise enters into outlet reactive muffling chamber 6 from the inner core 41 of resistance noise reduction device 4, create again A-A section area upwards to uprush, there occurs and do not mate due to acoustic impedance and the reflection produced and interference effect, in further absorption, low frequency noise, thus reach better soundproof effect.
Simultaneously, the bottom in outlet reactive muffling chamber 6 has a drain opening 14, when the careless rain of atrocious weather enters in this diesel generating set smoke-discharging noise elimination device, the ponding of urceolus 1 can be discharged from drain opening 14, thus prevent this diesel generating set smoke-discharging noise elimination device from damaging because of ponding.
A kind of diesel generating set smoke-discharging noise elimination device of the present utility model both allowed air-flow to pass through smoothly by the inner core 41 in import reactive muffling chamber 5, resistance noise reduction device 4 and outlet reactive muffling chamber 6, effectively can weaken again smoke evacuation noise and outwards propagate.The advantage of the existing dissipative muffler of a kind of diesel generating set smoke-discharging noise elimination device of the present utility model: by crossing porous noise elimination structure fixing on flow path at air current of smoke removal, utilize porous noise elimination structure, to the friction of sound wave and damping function, acoustic energy is converted into heat energy, reach the object of noise elimination, it is mainly for the high frequency sound wave in noise, and is realized by resistance noise reduction device 4.
A kind of diesel generating set smoke-discharging noise elimination device of the present utility model also has the advantage of reactive muffler: utilize sound wave reflection and interference effect, by changing sound wave propagation characteristic, sound wave energy is hindered outwards to propagate, reach the object of noise elimination, this is mainly for the noise sound wave of medium and low frequency, in fact by import reactive muffling chamber 5 A-A upwards section area relative to smoke evacuation import 11 A-A upwards the uprushing of section area, and outlet reactive muffling chamber 6 A-A upwards section area relative to single on resistance noise reduction device 4 inner core 41 A-A upwards uprushing of section area realize.
A kind of diesel generating set smoke-discharging noise elimination device of the present utility model combines the advantage of reactive muffler and dissipative muffler, reach the effect that in the frequency range to high, medium and low frequency, noise sound wave is eliminated the noise simultaneously, finally make diesel generating set smoke evacuation noise reduction 20 ~ 40dB, corresponding loudness reduces by 75% ~ 93%, thus improve the noise of diesel generating set machine room, improve working environment, solve noise and to disturb residents problem.Meanwhile, under identical soundproof effect, a kind of diesel generating set smoke-discharging noise elimination device of the present utility model is than greatly saving installing space and Master Cost with the combination of a dissipative muffler and a reactive muffler.
A kind of diesel generating set smoke-discharging noise elimination device of the present utility model is while reduction diesel generating set smoke evacuation noise, and cost is low, volume is little, quality is light, structure is simple, is convenient to processing, installs and maintenance.
Those of ordinary skill in the art will be appreciated that, above embodiment is only used to the utility model is described, and be not used as restriction of the present utility model, as long as in spirit of the present utility model, all will drop in Claims scope of the present utility model the change of the above embodiment, modification.
Claims (9)
1. a diesel generating set smoke-discharging noise elimination device, comprises urceolus, and the two ends of described urceolus are respectively equipped with the smoke evacuation import coaxial with described urceolus and discharge fume and export; It is characterized in that:
Be provided with coaxial resistance noise reduction device arranged with it in described urceolus, be provided with in described resistance noise reduction device and described resistance noise reduction device parallel to an axis, and the porous noise elimination structure of both ends open;
Import reactive muffling chamber is formed between described resistance noise reduction device and described smoke evacuation import;
Formed between described resistance noise reduction device and described smoke evacuation export and export reactive muffling chamber.
2. a kind of diesel generating set smoke-discharging noise elimination device according to claim 1, it is characterized in that: in described resistance noise reduction device, be filled with heat-resisting acoustical mineral packed layer, and some axis along described resistance noise reduction device run through described heat-resisting acoustical mineral packed layer and the inner core of both ends open, the hole wall of described inner core is evenly equipped with noise elimination through hole, the porous noise elimination structure described in formation.
3. a kind of diesel generating set smoke-discharging noise elimination device according to claim 2, is characterized in that: described inner core by punching roll of steel plate around forming.
4. a kind of diesel generating set smoke-discharging noise elimination device according to claim 2, is characterized in that: described inner core is uniform in described resistance noise reduction device.
5. a kind of diesel generating set smoke-discharging noise elimination device according to claim 2, is characterized in that: what fill in described heat-resisting acoustical mineral packed layer is mineral cotton.
6. a kind of diesel generating set smoke-discharging noise elimination device according to claim 2, is characterized in that: the inner core described in several is more than or equal to described smoke evacuation import at A-A section area upwards in A-A section area sum upwards.
7. a kind of diesel generating set smoke-discharging noise elimination device according to claim 1, is characterized in that: described smoke evacuation import and described smoke evacuation outlet are connected to flange.
8. a kind of diesel generating set smoke-discharging noise elimination device according to claim 1, is characterized in that: the bottom in described outlet reactive muffling chamber has a drain opening.
9. a kind of diesel generating set smoke-discharging noise elimination device according to claim 1, is characterized in that: described import reactive muffling chamber is greater than described smoke evacuation import at A-A section area upwards at A-A section area upwards; Described outlet reactive muffling chamber is greater than described smoke evacuation outlet at A-A section area upwards at A-A section area upwards.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520445455.4U CN204783177U (en) | 2015-06-26 | 2015-06-26 | Diesel generating set silencer of discharging fume |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520445455.4U CN204783177U (en) | 2015-06-26 | 2015-06-26 | Diesel generating set silencer of discharging fume |
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| CN204783177U true CN204783177U (en) | 2015-11-18 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109373098A (en) * | 2018-12-18 | 2019-02-22 | 安徽江淮汽车集团股份有限公司 | A kind of silencer of Frequency Adjustable |
| CN114165312A (en) * | 2021-11-12 | 2022-03-11 | 沈阳航天新光集团有限公司 | Full water-cooling impedance composite exhaust silencer |
-
2015
- 2015-06-26 CN CN201520445455.4U patent/CN204783177U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109373098A (en) * | 2018-12-18 | 2019-02-22 | 安徽江淮汽车集团股份有限公司 | A kind of silencer of Frequency Adjustable |
| CN109373098B (en) * | 2018-12-18 | 2019-11-05 | 安徽江淮汽车集团股份有限公司 | A kind of silencer of Frequency Adjustable |
| CN114165312A (en) * | 2021-11-12 | 2022-03-11 | 沈阳航天新光集团有限公司 | Full water-cooling impedance composite exhaust silencer |
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