CN201747435U - Muffler of resistance compound type water cooling type diesel engine generator set - Google Patents

Muffler of resistance compound type water cooling type diesel engine generator set Download PDF

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Publication number
CN201747435U
CN201747435U CN2010202628262U CN201020262826U CN201747435U CN 201747435 U CN201747435 U CN 201747435U CN 2010202628262 U CN2010202628262 U CN 2010202628262U CN 201020262826 U CN201020262826 U CN 201020262826U CN 201747435 U CN201747435 U CN 201747435U
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China
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expansion cavity
sound
muffler
expansion
absorbing material
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Expired - Fee Related
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CN2010202628262U
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Chinese (zh)
Inventor
袁春
陈兆海
严健
龚利红
袁浩文
陈强
潘小兵
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Chongqing Communication College of China PLA
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Chongqing Communication College of China PLA
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Abstract

The utility model discloses a muffler of a resistance compound type water cooling type diesel engine generator set, which comprises a sealed casing, an air inlet pipe, an exhaust pipe and a perforated separation plate, wherein two expansion cavities: a first expansion cavity and a second expansion cavity are arranged in the casing, sound absorption materials layers are paved on the inner side walls of the first expansion cavity and the second expansion cavity, the air inlet pipe enters the first expansion cavity from the lower part of one side of the muffler, the exhaust pipe is arranged in the second expansion cavity, the upper end of the exhaust pipe is arranged outside the muffler after being folded, the first expansion cavity and the second expansion cavity are communicated through a U-shaped communication pipe, a cooling water sleeve is formed between the casing and the sound absorption material layers, and a water inlet and a water outlet are arranged on the casing. The utility model adds the water cooling circulation heat radiation structure on the basis of the resistance compound muffling for forming the resistance compound type water cooling type muffler, the heat radiation of the surface of the muffler to the outside can be reduced, the temperature inside a sound insulation cover can be reduced, the structure of the sound insulation cover is simplified, the size and the weight of the whole machine can be reduced, the manufacture cost of the sound insulation cover can be reduced, and the noise control level can be improved.

Description

Impedance composite water-cooled muffler for diesel generator set
Technical field
The utility model relates to a kind of silencer, particularly a kind of impedance composite water-cooled muffler for diesel generator set.
Background technique
Diesel generating set (power station) is widely used in fixing or dislocation generation equipment such as national important foundation facility, military base, post and telecommunications, financial instrument, health care, outlying district, stability maintenance anti-terrorism, earthquake relief work.When ensureing the power supply of important department or densely inhabited district, very high to criteria of noise control.The noise level limit of diesel generating set is also more and more lower, and " GB/T21425-2008 low-noise electric power plant noise objective requires and method of measurement " proposed to be not more than the requirement of 73dB (A), and the noise of super-silent type diesel electric power plant then requires to be lower than 70dB (A).In order to adapt to the Noise Prevention and Treatment rules of increasingly stringent, must adopt the method that installs acoustic hood in the diesel generating set outside additional.But, because the delivery temperature of diesel engine so the surface temperature of silencing apparatus is very high, must design inlets and putlets of ventilation on acoustic hood between 300~600 ℃, and the forced ventilation heat radiation.The design of acoustic hood and ventilation and heat need be sought a suitable equinoctial point, to guarantee noise reduction and result of ventilating heat dissipation.The major defect of this design is that acoustic hood complex structure, volume and weight are very big, manufacture cost is high.
Generally speaking, reactive muffler can be eliminated the medium and low frequency noise preferably, and high frequency noise elimination effect is relatively poor; Dissipative muffler can better eliminate high-frequency noises, low frequency noise elimination effect is relatively poor; And adopt impedance composite muffler can eliminate high-frequency noise, and also can eliminate the medium and low frequency noise, control the full frequency band noise preferably.
Chinese patent publication number: CN200958405, open day: disclosed a kind of diesel engine silencer on October 10th, 2007, comprise adapter, outlet and sealing drum, in the sealing drum, become three anechoic rooms by two dividing plate tabulas, longitudinal tubule (L tubule) is located at first Room, and transverse tube is located at the 3rd Room, be responsible for respectively the dispersion of air inlet and the discharge of residual air, by the porous eye disperse, the buffering harmony wave reflection of three anechoic rooms reaches the purpose of noise elimination.Its deficiency is that it is a kind of easy three-chamber reactive muffler, uses this silencing apparatus final vacuum noise still up to 86~89dB (A), can't satisfy strict criteria of noise control such as low noise or super-silent diesel generating set (power station).Chinese patent publication number: CN201363176, open day: the air exhaust muffler device that on December 16th, 2009 disclosed a kind of low-noise vehicle-mounted power station, adopt two independently reactive muffler and dissipative muffler series connection formations (internal structure is not announced), the silencing apparatus surface temperature is very high, can only be installed on crew compartment (acoustic hood) outside of diesel generating set, structure is not compact, and is bulky.
Summary of the invention
The purpose of this utility model is exactly at the deficiencies in the prior art, a kind of diesel generating set (power station) that is mainly used in fixed and portable low noise and super-silent demand is provided, can reduce the exhaust sound of diesel generating set effectively, the impedance composite water-cooled silencing apparatus of compact structure.
For achieving the above object, the utility model adopts following technological scheme:
A kind of impedance composite water-cooled muffler for diesel generator set, the housing, suction tude, outlet pipe, the noise elimination perforation dividing plate that comprise sealing, suction tude is connected with the exhaust branch pipe of diesel engine, be evenly equipped with through hole on the noise elimination perforation dividing plate, it is characterized in that: be provided with two expansion cavities in the housing, first expansion cavity and second expansion cavity are equipped with sound-absorbing material layer on the madial wall of first expansion cavity and second expansion cavity; Suction tude enters upwards turnover behind first expansion cavity by the bottom of silencing apparatus one side, and outlet pipe is arranged in second expansion cavity, and the turnover of the upper end of outlet pipe is placed on the outside of silencing apparatus, is communicated with by U-shaped connecting tube between first expansion cavity and second expansion cavity; At suction tude and U-shaped between connecting tube, and outlet pipe and U-shaped are equipped with the perforation dividing plate of eliminating the noise between connecting tube, suction tude places the cylindrical shell of first expansion cavity to be provided with the suction tude sound attenuation hole, outlet pipe places the cylindrical shell of second expansion cavity to be provided with the outlet pipe sound attenuation hole, and the cylindrical shell of U-shaped connecting tube is provided with U-shaped connecting tube sound attenuation hole.
This silencing apparatus adopts the perforation dividing plate in first expansion cavity and second expansion cavity, form multistage expanssion type cavity configuration, and suction tude, U-shaped connecting tube, outlet pipe have all designed sound attenuation hole in the part of enclosure interior, constitutes the reactive muffling system.
The suction tude of silencing apparatus is circular, and diameter is identical with the diesel exhaust gas caliber.The outlet pipe length and the diameter of silencing apparatus require to calculate definite according to diesel engine discharge capacity, rotating speed, noise elimination.
Preferably, all be equipped with sound absorption perforation thin plate on the sound-absorbing material layer of described first expansion cavity, the second expansion cavity inwall; Described sound absorption perforation gauge of sheet≤3mm, the aperture of the perforation of sound absorption perforation thin plate is: 5~8mm, punching rate 〉=20%.
Preferably, described sound-absorbing material layer is made of glass wool, described glass wool density 30kg/m 3Described sound-absorbing material layer packed layer thickness is 5~30mm.Acoustic absorptivity is 0.8-0.9 (adding sound absorption perforation thin plate mask).Sound-absorbing material layer constitutes dissipative muffler, and the sound absorption structure of utilizing silencer internal wall to arrange is filled with the sound-absorbing material glass wool, can absorption portion propagate acoustic energy, can eliminate high-frequency noises preferably.
Preferably, described noise elimination perforation dividing plate in first expansion cavity and second expansion cavity is respectively 1~4, constitutes multistage expanssion type cavity configuration.
Preferably, be fixedly connected with supporting bar between described housing and the sound-absorbing material layer, supporting bar will be separated from each other between housing and the sound-absorbing material layer, make between housing and the sound-absorbing material layer and form cooling jacket, housing is provided with water intake and drain opening, water intake is connected with the water pipe of diesel engine cooling system, and drain opening is connected with the diesel engine radiator.
Further preferred, be separated from each other between described first expansion cavity and second expansion cavity, gap each other is communicated with cooling jacket.
The housing (water jacket samdwich) that between silencing apparatus inner chamber and housing (shell), is provided with, water pipe by drain opening but is connected with the circulating cooling system of generator set, cooling water wherein is pump circulation by means of the cooling waterpump of diesel engine, a large amount of heat energy in the silencing apparatus are taken away, and distribute by the radiator and the fan of diesel engine cooling system, waste-gas heat by silencing apparatus is taken out of by the water jacket water that is cooled, avoid to the inner distribute heat of silencing apparatus, distribute with the heat that is reduced in silencing apparatus inside, the noise that produces in the time of simultaneously can reducing back blast individual layer silencing apparatus wall, work down in the temperature (70~95 ℃, the diesel engine cooling system operating temperature) of regulation with the generator set unit and the silencing apparatus that guarantee acoustic hood inside.
This silencing apparatus adopts multistage expanssion type cavity configuration (reactive muffling), each cavity wall adopts sound absorbent perforated structure (resistance noise reduction), filling sucting sound material wherein, and design has cooling jacket in silencing apparatus, introduce the circulation cooling of diesel engine, thereby constitute impedance composite water-cooled diesel engine silencer.
The general resistance silencing apparatus mainly utilizes the different pipeline of shape, size and the appropriate combination of resonant cavity or expansion cavity, makes sound wave in pipeline, resonant cavity or expansion chamber inner reflection and interference, thereby reduces the noise of waste gas.The reactive muffler noise elimination frequency band is narrower, and better in the noise elimination effect of medium and low frequency section, the high band effect is relatively poor.Therefore, impedance composite muffler combines resistance noise reduction and reactive muffling, make its from low frequency, intermediate frequency in high-frequency range, all have good noise elimination effect.
The beneficial effect of a kind of impedance composite water-cooled muffler for diesel generator set of the utility model is, on impedance complex noise elimination basis, increase water-cooled circulation radiating structure, constitute impedance composite water-cooled silencing apparatus, can reduce the external thermal radiation in silencing apparatus surface effectively, reduce the acoustic hood inside temperature, simplify the acoustic hood structure greatly, reduce the machine volume and the weight of low noise and super-silent diesel generating set (power station), reduce the acoustic hood manufacture cost, increase substantially the noise controlling level.
Description of drawings
Fig. 1 is the schematic representation that the impedance composite water-cooled diesel engine silencer of the utility model removes loam cake;
Fig. 2 is the A-A sectional view the utility model figure among Fig. 1;
Fig. 3 is impedance composite water-cooled silencing apparatus of the utility model and the annexation schematic representation of being with the acoustic hood diesel generating set.
Embodiment
Below in conjunction with accompanying drawing the utility model is further described, but therefore the utility model is not limited among the described scope of embodiments.
Referring to Fig. 1, Fig. 3, a kind of impedance composite water-cooled muffler for diesel generator set, comprise housing 14, suction tude 11, the outlet pipe 2 of sealing, the perforation dividing plate 8 of eliminating the noise, suction tude 11 is connected with the exhaust branch pipe of diesel engine, be evenly equipped with through hole 81 on the noise elimination perforation dividing plate 8, it is characterized in that: be provided with two expansion cavities side by side in the housing 14, be equipped with sound-absorbing material layer 9 on the madial wall of first expansion cavity 7 and second expansion cavity, 3, the first expansion cavities 7 and second expansion cavity 3; Suction tude 11 enters the upwards turnover of first expansion cavity, 7 backs by the bottom of silencing apparatus one side, outlet pipe 2 is arranged in second expansion cavity 3, the upper end turnover of outlet pipe 2 is placed on the outside of silencing apparatus, is communicated with by U-shaped connecting tube 37 between first expansion cavity 7 and second expansion cavity 3; In suction tude 11 and between U-shaped connecting tube 37, and outlet pipe 2 and be equipped with the perforation dividing plate 8 of eliminating the noise between U-shaped connecting tube 37, suction tude 11 places the cylindrical shell of first expansion cavity 7 to be provided with suction tude sound attenuation hole 111, outlet pipe 2 places the cylindrical shell of second expansion cavity 3 to be provided with outlet pipe sound attenuation hole 21, and the cylindrical shell of U-shaped connecting tube 37 is provided with U-shaped connecting tube sound attenuation hole 371.
All be equipped with sound absorption perforation thin plate 5 on the sound-absorbing material layer 9 of described first expansion cavity 7, second expansion cavity, 3 inwalls; Thickness≤the 3mm of described sound absorption perforation thin plate 5, the aperture of the perforation 51 of sound absorption perforation thin plate 5 is: 5~8mm, punching rate 〉=20%.
Described sound-absorbing material layer 9 constitutes described glass wool density 30kg/m by glass wool 3Described sound-absorbing material layer 9 packed layer thickness are 5~30mm.
Described noise elimination perforation dividing plate 8 in first expansion cavity 7 and second expansion cavity 3 is respectively 1~4, constitutes multistage expansion cavity.
Be fixedly connected with supporting bar 101 between described housing 14 and the sound-absorbing material layer 9, supporting bar 101 will be separated from each other between housing 14 and the sound-absorbing material layer 9, form cooling jacket 10 between housing 14 and the sound-absorbing material layer 9, housing 14 is provided with water intake 12 and drain opening 1, water intake 12 is connected with the waste pipe of diesel engine, and drain opening 1 is connected with the diesel engine radiator.
Further preferred, be communicated with cooling jacket 10 between described first expansion cavity 7 and second expansion cavity 3.
Working principle
Referring to Fig. 1, Fig. 3, when muffler design, structure mainly adopts square, impedance composite water-cooled noise elimination structure, wherein the reactive muffling part is made of two-stage expansion cavity first expansion cavity 7 and second expansion cavity 3, dividing plate 8 and suction tude 11, outlet pipe 2, and the resistance noise reduction part is made of perforated plate 5 and sound-absorbing material 9.
Referring to Fig. 2, the water-cooled silencing apparatus forms by circulating pipe and diesel generating set 15, acoustic hood 16 and radiator 13 and is connected in series.Diesel generating set 15 and water-cooled silencing apparatus all are placed on acoustic hood 16 inside, and the water tank of diesel engine and radiator 13 place the top of acoustic hood, and water pipe is connected with the water-cooled silencing apparatus with the cooling system of diesel engine.
Referring to Fig. 2, when diesel generating set 15 work, the high temperature and high pressure gas (waste gas) that diesel engine is discharged enters the water-cooled silencing apparatus through exhaust branch pipe by suction port 11 (connecing Diesel Engine Exhaust Pipe).When waste gas enters first order expansion cavity 7 in the water-cooled silencing apparatus and flows, gas is ejection from the end of suction tude 11 and suction tude sound attenuation hole 111, and passes perforation dividing plate 8 its volume is expanded rapidly, and flow velocity reduces rapidly, mobile kinetic energy reduces, and exhaust sound is carried out the first order eliminate the noise; Then, waste gas by U-shaped connecting tube 37, enters second level expansion cavity 3 after expanding by the first order, and gas volume is further expanded, and flow velocity and mobile kinetic energy all further reduce; At last, pass the gas of second level expansion cavity perforation dividing plate 8, discharge from silencing apparatus through outlet pipe 2.
This muffler design is mainly by two big expansion cavities---and first expansion cavity 7 and second expansion cavity 3 constitute, and play the effect that dilatation is eliminated the noise on the one hand, and large space can reduce the flow velocity of gas on the other hand, is unlikely to produce excessive regenerated noise.On the wall of each grade expansion cavity, vertically place 1-4 sheet noise elimination dividing plate 8, designed the through hole 81 of some on the noise elimination dividing plate 8.The effect of noise elimination dividing plate 8 has been equivalent to increase the quantity of expansion cavity, has also changed the flow direction of gas simultaneously, increases the gas flow resistance.
As Fig. 1, shown in Figure 3, except adopting multistage expansion chamber (resistance) noise elimination structure, this silencing apparatus has also adopted the resistance noise reduction structure, forms impedance composite water-cooled silencing apparatus, to improve the noise elimination effect.Between the inwall of two-stage expansion chamber and water jacket, designed the sound absorption structure of sound absorption perforation thin plate 5, wherein filled the high temperature resistant sound-absorbing material that waits such as resistant to elevated temperatures super glass wool and constitute sound-absorbing material layer 9.
Sound absorption perforation thin plate 5 is the thin-walled steel plate, and its thickness is no more than 3mm, and the aperture is 5-8mm, and punching rate is not less than 20%; Adopt super glass wool as packing material, density 30kg/m3, packed layer thickness 20mm, acoustic absorptivity are 0.8-0.9 (adding the Punched Steel Plate mask).
Three, water-cooled cooling system structure
1, the circulatory system: be connected with the diesel engine cooling system water jacket by water pipe, constitute and force cool cycles; Utilize water pump, water tank, radiator and the circulatory system of diesel engine cooling system, need not increase equipment;
2, quantity of circulating water: generally speaking, quantity of circulating water and flow can remain unchanged;
3, arrangement: diesel generating set 15 and water-cooled silencing apparatus are arranged in acoustic hood 16 inside, and the water tank of unit and radiator 13 then are arranged on the top or outer side wall of acoustic hood 16.
The water jacket samdwich 10 that between silencing apparatus inner chamber and shell 14, is provided with, be connected with the circulation cooling of generator set 15 by water pipe, make by the waste-gas heat of silencing apparatus and taken out of by the cooling water of water jacket, avoid heat when distribute acoustic hood inside, distribute the noise that produces in the time of to reduce back blast individual layer silencing apparatus wall simultaneously with the heat that is reduced in acoustic hood inside.
Four, use the back effect:
(1) silencing apparatus inserts loss and is not less than 30dB (A);
(2) the silencing apparatus surface temperature is not higher than 95 ℃.
(3) can simplify the acoustic hood internal structure greatly, thereby alleviate acoustic hood weight, reduce manufacture cost.
Described mode of execution of the present utility model though combine accompanying drawing, those of ordinary skill in the art can make various distortion or modification within the scope of the appended claims.The technician of the industry should understand; the utility model is not restricted to the described embodiments; that describes in the foregoing description and the specification just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.

Claims (6)

1. impedance composite water-cooled muffler for diesel generator set, comprise housing (14), suction tude (11), the outlet pipe (2) of sealing, the perforation dividing plate (8) of eliminating the noise, suction tude (11) is connected with the exhaust branch pipe of diesel engine, be evenly equipped with through hole (81) on the noise elimination perforation dividing plate (8), it is characterized in that: housing (14) is provided with two expansion cavities, first expansion cavity (7) and second expansion cavity (3) are equipped with sound-absorbing material layer (9) on the madial wall of first expansion cavity (7) and second expansion cavity (3); Suction tude (11) enters the upwards turnover of first expansion cavity (7) back by the bottom of silencing apparatus one side, outlet pipe (2) is arranged in second expansion cavity (3), the upper end turnover of outlet pipe (2) is placed on the outside of silencing apparatus, is communicated with by U-shaped connecting tube (37) between first expansion cavity (7) and second expansion cavity (3); In suction tude (11) and between U-shaped connecting tube (37), and outlet pipe (2) and be equipped with the perforation dividing plate (8) of eliminating the noise between U-shaped connecting tube (37), suction tude (11) places the cylindrical shell of first expansion cavity (7) to be provided with suction tude sound attenuation hole (111), outlet pipe (2) places the cylindrical shell of second expansion cavity (3) to be provided with outlet pipe sound attenuation hole (21), and the cylindrical shell of U-shaped connecting tube (37) is provided with U-shaped connecting tube sound attenuation hole (371).
2. impedance composite water-cooled muffler for diesel generator set according to claim 1 is characterized in that: all be equipped with sound absorption perforation thin plate (5) on the sound-absorbing material layer (9) of described first expansion cavity (7), second expansion cavity (3) inwall; Thickness≤the 3mm of described sound absorption perforation thin plate (5), the aperture of the perforation (51) of sound absorption perforation thin plate (5) is: 5~8mm, punching rate 〉=20%.
3. impedance composite water-cooled muffler for diesel generator set according to claim 1 is characterized in that: described sound-absorbing material layer (9) is made of glass wool, described glass wool density 30kg/m 3Described sound-absorbing material layer (9) packed layer thickness is 5~30mm.
4. impedance composite water-cooled muffler for diesel generator set according to claim 1 is characterized in that: described noise elimination perforation dividing plate (8) in first expansion cavity (7) and second expansion cavity (3) is respectively 1~4.
5. impedance composite water-cooled muffler for diesel generator set according to claim 1, it is characterized in that: be fixedly connected with supporting bar (101) between described housing (14) and the sound-absorbing material layer (9), supporting bar (101) will be separated from each other between housing (14) and the sound-absorbing material layer (9), form cooling jacket (10) between housing (14) and the sound-absorbing material layer (9), housing (14) is provided with water intake (12) and drain opening (1), water intake (12) is connected with the waste pipe of diesel engine, and drain opening (1) is connected with the diesel engine radiator.
6. impedance composite water-cooled muffler for diesel generator set according to claim 5 is characterized in that: be communicated with cooling jacket (10) between described first expansion cavity (7) and second expansion cavity (3).
CN2010202628262U 2010-07-19 2010-07-19 Muffler of resistance compound type water cooling type diesel engine generator set Expired - Fee Related CN201747435U (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101907009A (en) * 2010-07-19 2010-12-08 中国人民解放军重庆通信学院 Impedance composite water-cooled muffler for diesel generator set
CN110259545A (en) * 2019-07-17 2019-09-20 佛山市秦跃鑫金属制造有限公司 A kind of automobile silencer that tail gas clean-up performance is high
CN110939497A (en) * 2019-12-31 2020-03-31 重庆鼎工机电有限公司 Full water-cooling combined exhaust silencer for diesel engine
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

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101907009A (en) * 2010-07-19 2010-12-08 中国人民解放军重庆通信学院 Impedance composite water-cooled muffler for diesel generator set
CN110259545A (en) * 2019-07-17 2019-09-20 佛山市秦跃鑫金属制造有限公司 A kind of automobile silencer that tail gas clean-up performance is high
CN110939497A (en) * 2019-12-31 2020-03-31 重庆鼎工机电有限公司 Full water-cooling combined exhaust silencer for diesel engine
CN110939497B (en) * 2019-12-31 2023-08-15 重庆鼎工机电有限公司 Full water cooling composite exhaust muffler for diesel engine
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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Granted publication date: 20110216

Termination date: 20110719