CN206429284U - A kind of diesel generating set composite muffler - Google Patents
A kind of diesel generating set composite muffler Download PDFInfo
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- CN206429284U CN206429284U CN201621197528.3U CN201621197528U CN206429284U CN 206429284 U CN206429284 U CN 206429284U CN 201621197528 U CN201621197528 U CN 201621197528U CN 206429284 U CN206429284 U CN 206429284U
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Abstract
The utility model is related to the silencer applied to internal combustion engine sound-deadening and noise-reducing field, specifically a kind of diesel generating set composite muffler, including air inlet pipe, connected with air inlet pipe resistance noise reduction structure, be arranged on the reactive muffling structure of resistance noise reduction inside configuration and the escape pipe with resistance noise reduction structures in series；Resonance perforated plate is collectively forming three expansion chambers with one-level resistance baffle plate and two grades of resistance baffle plates, is arranged as by the direction order of air inlet pipe to escape pipe：Expansion chamber I, expansion chamber II and expansion chamber III.Resistance noise reduction is used in series with two kinds of structures of reactive muffling, obtains broader noise reduction frequency band range；Using different expansion ratios, exhaust airstream is improved by frequency, makes silencer that there is higher noise elimination peak value, increases sound deadening capacity.With broad noise reduction frequency band, low, the characteristics of overall weight is light is lost in small volume, simple in construction, transmission.The effect for improving anti-corrosion function is realized using metal tube and metallic plate simultaneously.
Description
Technical field
The utility model is related to the silencer applied to internal combustion engine sound-deadening and noise-reducing field, specifically a kind of diesel-driven generator
Group composite muffler, can be applicable in the Jing Yin diesel generating set silene system of high-performance.
Background technology
Smoke-discharging noise elimination device can be divided into dissipative muffler, reactive muffler, impedance composite muffler etc. by its principle.Resistance
Silencer connects resonant cavity using the section or side being mutated on pipeline, makes some frequency sound waves along pipe transmmision, in cutting for mutation
The phenomenons such as reflection, interference occur at face, so as to reach the purpose of noise elimination.Reactive muffler have it is good in, low frequency eliminate the noise it is special
Property.Dissipative muffler can be considered absorption energy type silencer, and it is passed through using sound wave in sound-absorbing porous material, because rubbing and gluing
Resistance hysteresis, triggers the vibration of many empty materials, acoustic wave energy is converted into the other forms energy dissipation such as kinetic energy, heat energy and fallen, so that
Reduction acoustic wave energy is reached, the purpose eliminated the noise is realized.Dissipative muffler has good medium, high frequency soundproof effect.
Impedance composite muffler is that dissipative muffler and reactive muffler advantageous combination are used, and makes it in broader frequency
Preferable soundproof effect is obtained in the range of rate band.
With the development of diesel generating set manufacturing technology, user requires increasingly harsh to the noise objective of unit, to height
Performance noise-reduced diesel generator group requires small volume, lightweight, low noise, and dependable performance, and conventional muffler volume is big, structure
Simply, noise reduction frequency band is narrow, and noise reduction is limited, and does not take into account the function such as anti-corrosion, heat-insulated, reduction emission smoke intensity, with high-performance diesel oil
Generating set is mismatched.
Although secondary muffler sound deadening capacity is better than one-level silencer, its volume, length determine that required installing space is more than
One-level silencer, the generating set for having particular/special requirement to bulk, mounting means is not applied to.Therefore noise elimination frequency band need to be developed
Width, small volume, the efficient one-level smoke-discharging noise elimination device of lightweight, low transmission loss, take into account anti-corrosion, reduction infrared characteristic and discharge cigarette
The silencer of degree, the overall acoustical behavior to lifting high-performance diesel generating set is significant.
Utility model content
The utility model is directed to above-mentioned problems of the prior art, it is proposed that a kind of diesel generating set is with compound
Silencer, solve that one-level silencer noise elimination frequency band in the prior art is narrow, volume is bigger than normal, it is not heat-insulated the problems such as, with it is corrosion-resistant,
The features such as anechoic frequency bandwidth, transmission lose small, reduction emission smoke intensity and are lightweight.
Technical solution of the present utility model is：
A kind of diesel generating set composite muffler, including air inlet pipe, connected with air inlet pipe resistance noise reduction structure,
The reactive muffling structure of resistance noise reduction inside configuration and the escape pipe with resistance noise reduction structures in series are arranged on, it is described resistive
Noise elimination structure is made up of muffler shell, sound-absorbing material and resonance perforated plate with the order of ecto-entad；The reactive muffling knot
Structure includes one-level reactive muffling structure and two grades of reactive muffling structures；The one-level reactive muffling structure by one-level resistance baffle plate and
One-level interpolation pipe is constituted, and one-level interpolation pipe passes perpendicularly through one-level resistance baffle plate and is welded and fixed, and resonance perforated plate is anti-perpendicular to one-level
Property baffle plate is welded and fixed；Two grades of reactive muffling structures are made up of two grades of resistance baffle plates and two grades of interpolation pipes, two grades of interpolation pipes
Pass perpendicularly through two grades of resistance baffle plates to be welded and fixed, resonance perforated plate is welded and fixed perpendicular to two grades of resistance baffle plates；In the one-level
It is intubated as 2, is symmetrically distributed in the edge of one-level resistance baffle plate；Two grades of interpolation pipes are 4, are evenly distributed in two grades of resistances
The edge of baffle plate；The monomer cross-sectional area of the one-level interpolation pipe is more than the monomer cross-sectional area of two grades of interpolation pipes, one-level interpolation
The overall cross sectional area of pipe is less than the overall cross sectional area of two grades of interpolation pipes；The resonance perforated plate and one-level resistance baffle plate and two
Level resistance baffle plate is collectively forming three expansion chambers, is arranged as by the direction order of air inlet pipe to escape pipe：Expansion chamber I, expansion
Open chamber II and expansion chamber III.
The beneficial effect of the utility model compared with prior art：
1, resistance noise reduction is used in series with two kinds of structures of reactive muffling so that silencer integrally obtains broader
Noise reduction frequency band range；
2, using different expansion ratios, exhaust airstream is improved by frequency, makes silencer that there is higher noise elimination peak value, is increased
Large noise elimination quantity；
3, silencer has broad noise reduction frequency band, small volume, simple in construction, transmission loss are low, and overall weight is light
Feature；
4, while the resistance baffle plate being made using titanium alloy interpolation pipe and stainless steel plate realizes the effect for improving anti-corrosion function
Really；
5, sound wedge uses conical structure so that air-flow is low relative to sound wedge flow resistance, can centering, high-frequency noise progress
Effectively sound absorption；
6, the interior filling stainless steel wire of sound wedge, it is possible to decrease emission smoke intensity strengthens the silencer feature of environmental protection.
Brief description of the drawings
Fig. 1 is the utility model structural representation；
Fig. 2 is the utility model the first noise elimination cavity structural representation；
Fig. 3 is the utility model the second noise elimination cavity structural representation；
Fig. 4 is the noise elimination cavity structural representation of the utility model the 3rd；
Fig. 5 is the utility model intake interface structural representation；
Fig. 6 is the utility model exhaust port structural representation.
Wherein, 1, air inlet pipe, 12, inlet flange, 2, resistance noise reduction structure, 21, muffler shell, 22, sound-absorbing material,
23rd, resonate perforated plate, and 3, reactive muffling structure, 31, one-level reactive muffling structure, 311, one-level resistance baffle plate, 312, in one-level
Intubation, 32, two grades of reactive muffling structures, 321, two grades of resistance baffle plates, 322, two grades of interpolation pipes, 4, escape pipe, 42, outlet method
Orchid, 10, sound wedge, 91, expansion chamber I, 92, expansion chamber II, 93, expansion chamber III.
Embodiment
The utility model is described further below in conjunction with the accompanying drawings.
Wherein, for the ease of it will be appreciated by those skilled in the art that using the vocabulary such as internal, outside, head, afterbody and combining attached
Figure is illustrated, in Figure of description 1, and the left part that all elements are located at figure is head, and all elements are located at figure
Right part is afterbody, and perforated pipe is internal, silencer relative to the position of muffler shell, sound-absorbing material, the perforated plate that resonates
It is outside outside shell.
Embodiment 1：
A kind of diesel generating set composite muffler, including air inlet pipe, connected with air inlet pipe resistance noise reduction structure,
The reactive muffling structure of resistance noise reduction inside configuration and the escape pipe with resistance noise reduction structures in series are arranged on, it is described resistive
Noise elimination structure is made up of muffler shell, sound-absorbing material and resonance perforated plate with the order of ecto-entad.
In resistance noise reduction structure, resonance perforated plate not only acts as supporting role, while being also resonant silencing structure, enhancing disappears
Sound device acoustical behavior；Energy is absorbed by sound-absorbing material, the noise of medium, high frequency carries out absorption noise reduction by sound-absorbing material.Resonance
There is perforation, noise is reached at sound-absorbing material by perforation, is punching rate on perforated plate（Area ratio）Perforated for 42% resonance
Plate.Sound-absorbing material（22）It is long silk quality glass fibre, in order to ensure erasure effect, length of the packing volume than preferably 30% ~ 36%
Silk quality glass fibre.Packing material possesses heat insulating function while strengthening acoustically effective, can prevent from scalding, improve the infrared spy of unit
Property.
Shell and the end cap at silencer two ends are welded；Air inlet pipe passes through train head lid, is welded with end cap；Escape pipe passes through tail
Portion's end cap, is welded with end cap.
The reactive muffling structure includes one-level reactive muffling structure and two grades of reactive muffling structures；The one-level resistance disappears
Acoustic form is made up of one-level resistance baffle plate and one-level interpolation pipe, and one-level interpolation pipe passes perpendicularly through one-level resistance baffle plate and is welded and fixed,
Resonance perforated plate is welded and fixed perpendicular to one-level resistance baffle plate；Two grades of reactive muffling structures are by two grades of resistance baffle plates and two grades
Interpolation pipe is constituted, and two grades of interpolation pipes pass perpendicularly through two grades of resistance baffle plates and are welded and fixed, and resonance perforated plate is kept off perpendicular to two grades of resistances
Plate weld is fixed；One-level, two grades of interpolation pipes are the interpolation pipe that titanium alloy material is made.
The one-level interpolation pipe is 2, is symmetrically distributed in the edge of one-level resistance baffle plate；
Two grades of interpolation pipes are 4, are evenly distributed in the edge of two grades of resistance baffle plates；
The monomer cross-sectional area of the one-level interpolation pipe is more than the monomer cross-sectional area of two grades of interpolation pipes, one-level interpolation pipe
Overall cross sectional area is less than the overall cross sectional area of two grades of interpolation pipes；
The resonance perforated plate is collectively forming three expansion chambers with one-level resistance baffle plate and two grades of resistance baffle plates, by air inlet
The direction order of pipe to escape pipe is arranged as：Expansion chamber I, expansion chamber II and expansion chamber III.
In order to improve anti-corrosive properties, one-level resistance baffle plate and two grades of resistance baffle plates are the metals being made up of the thick stainless steel plates of 4mm
Plate, surface density is big, and intensity is good, and radiated noise is not likely to produce under vibration and gas shock, can centering, low-frequency noise carry out it is effective
Barrier.
Expansion chamber I, expansion chamber II are different with the expansion ratio of expansion chamber III；Wherein, the expansion ratio of expansion chamber I is big
In the expansion ratio of expansion chamber II, the expansion ratio of expansion chamber II is more than the expansion ratio of expansion chamber III；A wherein chamber passes through frequency
Rate is the maximum frequency of noise elimination of another chamber, can expand frequency of noise elimination scope, reason is as follows：
Because high-temperature high-speed airflow passes through in silencer, the increase of divergence ratio can improve the peak of silencer transmission loss
Value, at the same time, because the presence that high frequency fails can shorten effective deadening frequency band, the expansion cavity of different structure can face in the presence of one
Boundary's divergence ratio, occurs the peak value of a pressure loss at critical divergence ratio.Therefore, three expansion chamber by it is foregoing not
With the design of expansion ratio, critical divergence ratio can be avoided, three noise elimination cavity chamber length are different, enable to silencer to have good
Acoustical behavior and aerodynamic performance.Different expansion ratios can improve exhaust airstream by frequency, have silencer higher
Noise elimination peak value, increase sound deadening capacity.
In reactive muffling structure, one-level interpolation pipe, the combination of one-level resistance baffle plate and two grades of interpolation pipes, two grades of resistances are utilized
The combination of baffle plate, realizes discharge duct（The passage that resonance perforated plate in the present embodiment is surrounded）The abrupt change of cross-section, and expand
Chamber I and air inlet pipe formation resonant silencing chamber are opened, high-temperature high-speed airflow enters resonant silencing chamber through air inlet pipe, makes noise in mutation
Section at occur the phenomenons such as reflection, interference, reach the purpose of noise elimination, in realization, the noise of low frequency carried out by sound-absorbing material
Absorb noise reduction.Meanwhile, resonance perforated plate, sound-absorbing material can still keep centering, the acoustic damping characteristic of high-frequency noise.
The above-mentioned technical proposal that the present embodiment is used, realizes being used in series for resistance noise reduction and two kinds of structures of reactive muffling,
So that silencer integrally obtains broader noise reduction frequency band range；Meanwhile, using different expansion ratios, improve exhaust gas
Circulate overfrequency, silencer is had higher noise elimination peak value, increases sound deadening capacity.Referring now to many backstop knots of the prior art
Structure, many interpolation tubular constructions, and excessive right angle or corner structure, the technical scheme that the present embodiment is provided, which has, is meeting broad
Noise reduction frequency band on the basis of, small volume（Only two groups interpolation pipes are arranged in silencer）, it is simple in construction（Straight line is connected,
Few right angle or corner structure）, transmission loss it is low（Utilize two kinds of different expansion ratios）, the characteristics of overall weight is light.Utilize simultaneously
Metal tube（Titanium alloy interpolation pipe）And metallic plate（The resistance baffle plate that stainless steel plate is made）Realize the effect for improving anti-corrosion function.
Embodiment 2：
On the basis of embodiment 1, the present embodiment proposes a kind of preferred structure.
The length that the one-level interpolation pipe is located in expansion chamber I is a quarter of expansion chamber I, the one-level interpolation
The length that pipe is located in expansion chamber II is 1/2nd of expansion chamber II；
The length that two grades of interpolation pipes are located in expansion chamber II is in a quarter of expansion chamber II, described two grades
The length that intubation is located in expansion chamber III is 1/2nd of expansion chamber III.
Relative to the technical scheme in embodiment 1, the technical scheme that the present embodiment is provided belongs to a kind of excellent in embodiment 1
Select scheme so that more reasonable, the transmission damage of the expansion ratio design between expansion chamber I, expansion chamber II and expansion chamber III
Failure fruit is lower, and sound-absorbing effect is more preferable.
Embodiment 3：
On the basis of foregoing all embodiments, in order to further improve sound-absorbing effect, present embodiments provide one kind and change
The technical scheme entered.
A sound wedge is set up on the pipeline head that the escape pipe is located inside expansion chamber III.Sound wedge is welded with blast pipe
Connect, sound wedge uses conical structure, this structure make it that air-flow is low relative to sound wedge flow resistance, can centering, high-frequency noise enter
Row effectively sound absorption；Multiple through holes for being used to be vented are provided with the circular conical surface of sound wedge, the percent opening of through hole is arranged according to diesel engine
Gas characteristic is designed；Filling stainless steel wire in the sound wedge, it is possible to decrease emission smoke intensity, strengthens the silencer feature of environmental protection.
In foregoing all embodiments, the circuit design that the air inlet pipe is located inside expansion chamber I is air inlet perforated pipe.Enter
Gas perforated pipe has increase discharge area, improves the effect of high-temperature gas flow velocity.Meanwhile, for the ease of in use according to air inlet
The head of pipe has inlet flange, and the afterbody of the escape pipe has outlet flange；Inlet flange is respectively welded with outlet flange
In air inlet tube head and escape pipe afterbody.
Utility model works principle：
High-temp waste gas enters expansion chamber I by air inlet pipe（Or it is referred to as resonant silencing chamber as mentioned before）, by first
Secondary expansion is eliminated the noise, and realizes that acoustic wave energy is consumed through sound-absorbing material in expansion chamber I, the noise of medium, high frequency passes through sound-absorbing material
Carry out absorption noise reduction；High-temp waste gas flows into expansion chamber II and expansion chamber III through two groups of interpolation pipes again, due to the abrupt change of cross-section, makes
The phenomenons such as reflection, interference occur at the section of mutation for noise, reach the purpose of noise elimination, and in realization, the noise of low frequency passes through and inhale
Sound material carries out absorption noise reduction；Be then passed through sound wedge, sound wedge uses conical structure, can centering, high-frequency noise had
Effect sound absorption, final high temperature waste gas is flowed out by blast pipe, completes silencer noise elimination noise reduction function.
The utility model is described in detail above in association with accompanying drawing embodiment, those skilled in the art can root
Many variations example is made to the utility model according to described above.Thus, some of embodiment details should not be constituted to this practicality
New restriction, the utility model regard the scope defined using appended claims as protection domain of the present utility model.
Claims (10)
1. a kind of diesel generating set composite muffler, including air inlet pipe（1）With air inlet pipe（1）The resistance noise reduction of series connection
Structure（2）, be arranged on resistance noise reduction structure（2）Internal reactive muffling structure（3）And with resistance noise reduction structure（2）Series connection
Escape pipe（4）, the resistance noise reduction structure（2）By muffler shell（21）, sound-absorbing material（22）With resonance perforated plate（23）
Constituted with the order of ecto-entad；
It is characterized in that：The reactive muffling structure（3）Including one-level reactive muffling structure（31）With two grades of reactive muffling structures
（32）；
The one-level reactive muffling structure（31）By one-level resistance baffle plate（311）With one-level interpolation pipe（312）Composition, one-level interpolation
Pipe（312）Pass perpendicularly through one-level resistance baffle plate（311）It is welded and fixed, resonate perforated plate（23）Perpendicular to one-level resistance baffle plate
（311）It is welded and fixed；
Two grades of reactive muffling structures（32）By two grades of resistance baffle plates（321）With two grades of interpolation pipes（322）Composition, two grades of interpolations
Pipe（322）Pass perpendicularly through two grades of resistance baffle plates（321）It is welded and fixed, resonate perforated plate（23）Perpendicular to two grades of resistance baffle plates
（321）It is welded and fixed；
The one-level interpolation pipe（312）For 2, one-level resistance baffle plate is symmetrically distributed in（311）Edge；
Two grades of interpolation pipes（322）For 4, two grades of resistance baffle plates are evenly distributed in（321）Edge；
The one-level interpolation pipe（312）Monomer cross-sectional area be more than two grades of interpolation pipes（322）Monomer cross-sectional area, in one-level
Intubation（312）Overall cross sectional area be less than two grades of interpolation pipes（322）Overall cross sectional area；
The resonance perforated plate（23）With one-level resistance baffle plate（311）With two grades of resistance baffle plates（321）It is collectively forming three expansions
Chamber, by air inlet pipe（1）To escape pipe（4）Direction order be arranged as：Expansion chamber I（91）, expansion chamber II（92）And expansion
Open chamber III（93）.
2. a kind of diesel generating set composite muffler according to claim 1, it is characterised in that：In the one-level
Intubation（312）Positioned at expansion chamber I（91）Interior length is expansion chamber I（91）A quarter, the one-level interpolation pipe
（312）Positioned at expansion chamber II（92）Interior length is expansion chamber II（92）1/2nd；
Two grades of interpolation pipes（322）Positioned at expansion chamber II（92）Interior length is expansion chamber II（92）A quarter,
Two grades of interpolation pipes（322）Positioned at expansion chamber III（93）Interior length is expansion chamber III（93）1/2nd.
3. a kind of diesel generating set composite muffler according to claim 2, it is characterised in that：The escape pipe
（4）Positioned at expansion chamber III（93）Internal pipeline head has the sound wedge of conical structure（10）.
4. a kind of diesel generating set composite muffler according to claim 3, it is characterised in that：The sound wedge
（10）Interior filling stainless steel wire.
5. a kind of diesel generating set composite muffler according to claim 2, it is characterised in that：The air inlet pipe
（1）Positioned at expansion chamber I（91）Internal pipeline is air inlet perforated pipe.
6. a kind of diesel generating set composite muffler according to any one of claim 1 ~ 5, it is characterised in that：Institute
State air inlet pipe（1）Head there is inlet flange（12）, the escape pipe（4）Afterbody there is outlet flange（42）.
7. a kind of diesel generating set composite muffler according to any one of claim 1 ~ 5, it is characterised in that：Institute
State sound-absorbing material（22）It is the long silk quality glass fibre that packing volume ratio is 30% ~ 36%.
8. a kind of diesel generating set composite muffler according to any one of claim 1 ~ 5, it is characterised in that：Altogether
Shake perforated plate（23）It is the resonance perforated plate that punching rate is 42%, described punching rate is area ratio.
9. a kind of diesel generating set composite muffler according to any one of claim 1 ~ 5, it is characterised in that：Institute
State one-level interpolation pipe（312）With two grades of interpolation pipes（322）It is the metal tube being made up of titanium alloy material.
10. a kind of diesel generating set composite muffler according to any one of claim 1 ~ 5, it is characterised in that：
The one-level resistance baffle plate（311）With two grades of resistance baffle plates（321）It is the metallic plate being made up of the thick stainless steel plates of 4mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621197528.3U CN206429284U (en) | 2016-11-07 | 2016-11-07 | A kind of diesel generating set composite muffler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621197528.3U CN206429284U (en) | 2016-11-07 | 2016-11-07 | A kind of diesel generating set composite muffler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206429284U true CN206429284U (en) | 2017-08-22 |
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ID=59588894
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621197528.3U Expired - Fee Related CN206429284U (en) | 2016-11-07 | 2016-11-07 | A kind of diesel generating set composite muffler |
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| Country | Link |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106401697A (en) * | 2016-11-07 | 2017-02-15 | 沈阳航天新光集团有限公司 | Complex silencer for diesel generator unit |
| CN110428800A (en) * | 2019-08-28 | 2019-11-08 | 宝钢空调（泰州）有限公司 | A kind of pre- insulation impedance composite muffler |
| CN112484113A (en) * | 2020-11-16 | 2021-03-12 | 宁波方太厨具有限公司 | Noise reduction device, range hood applying noise reduction device and control method of range hood |
-
2016
- 2016-11-07 CN CN201621197528.3U patent/CN206429284U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106401697A (en) * | 2016-11-07 | 2017-02-15 | 沈阳航天新光集团有限公司 | Complex silencer for diesel generator unit |
| CN106401697B (en) * | 2016-11-07 | 2019-06-04 | 沈阳航天新光集团有限公司 | A kind of diesel generating set composite muffler |
| CN110428800A (en) * | 2019-08-28 | 2019-11-08 | 宝钢空调（泰州）有限公司 | A kind of pre- insulation impedance composite muffler |
| CN112484113A (en) * | 2020-11-16 | 2021-03-12 | 宁波方太厨具有限公司 | Noise reduction device, range hood applying noise reduction device and control method of range hood |
| CN112484113B (en) * | 2020-11-16 | 2022-02-18 | 宁波方太厨具有限公司 | Noise reduction device, range hood applying noise reduction device and control method of range hood |
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Granted publication date: 20170822 Termination date: 20191107 |