CN209557352U - Marine low speed diesel engine axis stream supercharger air compressor exit silencer - Google Patents
Marine low speed diesel engine axis stream supercharger air compressor exit silencer Download PDFInfo
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- CN209557352U CN209557352U CN201920344869.6U CN201920344869U CN209557352U CN 209557352 U CN209557352 U CN 209557352U CN 201920344869 U CN201920344869 U CN 201920344869U CN 209557352 U CN209557352 U CN 209557352U
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Abstract
The utility model provides a kind of marine low speed diesel engine axis stream supercharger air compressor exit silencer, it is inserted into the exhaust duct of compressor housings, it specifically includes: connecting flange, outside pipeline, inside pipeline, supporting positioning member and support plate, outside pipeline is located at the outside of inside pipeline and there are certain intervals with the inner wall of exhaust duct, connecting flange and outside pipeline, it welds one end of inside pipeline, supporting positioning member and outside pipeline, the other end of inside pipeline welds, cavity is collectively formed, support plate is welded in the cavity, cavity is divided at least two resonant cavities, the outlet of connecting flange and compressor housings is bolted to connection, supporting positioning member and compressor housings are clamped, the rectangular channel that resonant cavity is connected with exhaust duct is machined on the circumference of inside pipeline.The utility model is mounted in the exhaust duct of compressor housings, and under the bulk for not increasing booster, the high frequency pneumatic noise of marine low-speed machine supercharger air compressor generation is effectively reduced.
Description
Technical field
The utility model belongs to muffler technical field, more specifically, is related to a kind of marine low speed diesel engine axis stream increasing
Depressor blower outlet muffler.
Background technique
Turbocharger is widely used on marine diesel, improves the power density and economy of marine diesel,
But turbocharger is in the process of running, the sound pressure level of compressor aerodynamic noise is high, becomes mainly making an uproar for marine diesel
One of sound source.Currently, mainly installing compressor air inlet machine muffler on marine diesel oil arbor stream booster, calmed the anger with reducing booster
Machine aerodynamic noise amount of radiation, the available effective control of the aerodynamic noise of compressor, but it is continuous with diesel engine power
Increase, the pressure ratio of booster, flow are continuously increased, and the single-stage mesh power of current low-speed diesel engine axis stream booster reaches
30000kW reaches 4.8 using pressure ratio, and maximum stream flow can achieve 60m3/ s, this leads to the aerodynamic noise of supercharger air compressor not
It is disconnected to increase, the simple noise objective that booster has been unable to satisfy using compressor inlet filtering silencer.
Currently, automobile-used small-sized mixed flow booster can use blower outlet muffler, booster is further decreased in this way
Noise, still, blower outlet muffler is typically mounted on blower outlet, if a part as booster, compressor
Exit silencer increases the shape connection size of booster, and the pipeline needs between diesel engine and booster rearrange, no
Conducive to the apolegamy and arrangement of blower outlet muffler.On large-sized low-speed diesel engine, blower outlet connects intercooler, if
The shape interface ruler that booster is changed when selection installation blower outlet muffler, then diesel engine needs to change connecting tube
Road increases cost and period, is unfavorable for the selection of diesel engine client.It therefore, is the noise for reducing booster, meanwhile, do not change
The shape connection size for becoming booster, designs that a kind of structure is simple, and the muffler that can be inserted into compressor casing body is to solve
The key point of the above problem.
Utility model content
In view of the above problems, the purpose of the utility model is to provide a kind of marine low speed diesel engine axis stream supercharger air compressors
The height of marine low-speed machine supercharger air compressor generation is effectively reduced under the bulk for not increasing booster in exit silencer
Frequency aerodynamic noise.
Marine low speed diesel engine axis stream supercharger air compressor exit silencer provided by the utility model, is inserted into compressor
It in the exhaust duct of shell, specifically includes: connecting flange, outside pipeline, inside pipeline, supporting positioning member and support plate, outboard tube
Road is located at the outside of inside pipeline and there are certain interval, connecting flange and outside pipelines, inside pipeline with the inner wall of exhaust duct
One end welding, supporting positioning member and outside pipeline, inside pipeline the other end weld, cavity, support plate welding is collectively formed
In the cavity, cavity is divided at least two resonant cavities, the outlet of connecting flange and compressor housings is bolted company
It connects, supporting positioning member and compressor housings are clamped, and are machined on the circumference of inside pipeline and resonant cavity is connected with exhaust duct
Rectangular channel.
Additionally, it is preferred that structure be that the thickness of each resonant cavity is 5-15mm.
Furthermore it is preferred that structure be, each resonant cavity it is of different size.
Additionally, it is preferred that structure be to be separately filled with deadener in each resonant cavity.
Furthermore preferred structure is, outside pipeline is cone, and is greater than the other end close to the diameter of connecting flange one end
Diameter.
Compared with prior art, marine low speed diesel engine axis stream supercharger air compressor provided by the utility model exports noise reduction
Device is mounted in the exhaust duct of compressor housings, in the space ruler for not increasing booster by connecting flange and supporting positioning member
Under very little, the high frequency pneumatic noise of marine low-speed machine supercharger air compressor generation is effectively reduced, after the utility model is installed, booster
Noise can effectively reduce 3--5dB.
Detailed description of the invention
By reference to the following description in conjunction with the accompanying drawings and the contents of the claims, and with to the utility model more
Comprehensive understanding, other purposes and result of the utility model will be more clearly understood and understood.In the accompanying drawings:
Fig. 1 is the marine low speed diesel engine axis stream supercharger air compressor exit silencer according to the utility model embodiment
Assembling structure schematic diagram；
Fig. 2 is the marine low speed diesel engine axis stream supercharger air compressor exit silencer according to the utility model embodiment
Structural schematic diagram；
Fig. 3 is the partial enlarged view of Fig. 2.
Appended drawing reference therein includes: 1- muffler, 2- compressor housings, 3- connecting flange, pipeline, 5- support on the outside of 4-
Locating piece, 6- inside pipeline, 7- support plate, 8- resonant cavity, 9- rectangular channel.
Identical label indicates similar or corresponding feature or function in all the appended drawings.
Specific embodiment
Specific embodiment of the utility model is described in detail below with reference to attached drawing.
As Fig. 1-Fig. 3 jointly shown in, the utility model embodiment provides a kind of marine low speed diesel engine axis stream booster pressure
Mechanism of qi exit silencer, the muffler 1 are mounted in the exhaust duct of 2 tail portion of compressor housings, that is, are mounted on compressor housings 2
In outlet, which is specifically included: connecting flange 3, outside pipeline 4, supporting positioning member 5, inside pipeline 6 and support plate 7,
Outside pipeline 4 is located at the outside of inside pipeline 6 and there are certain intervals with the inner wall of the exhaust duct of 2 tail portion of compressor housings, prevents
Only cause to interfere when assemble muffler 1 with compressor housings 2 due to processing, connecting flange 3 and outside pipeline 4,
One end of inside pipeline 6 is welded, and the other end of supporting positioning member 5 and outside pipeline 4, inside pipeline 6 welds, supporting positioning member 5
There are location fits with compressor housings 2, and when installing muffler 1, supporting positioning member 5 and compressor housings 2 are clamped, connection method
Orchid 3 is fixedly connected by bolt with the outlet of compressor housings 2, connecting flange 3, outside pipeline 4, supporting positioning member 5 and inside
Pipeline 6 surrounds cavity jointly, and support plate 7 is within the cavity, and the both ends of support plate 7 are welded with outside pipeline 4, inside pipeline 6 respectively
It connects, cavity is divided at least two resonant cavities 8, the cavity thickness of each resonant cavity 8 is 5-15mm, in the circle of inside pipeline 6
The rectangular channel 9 that resonant cavity 8 is connected with the exhaust duct of 2 tail portion of compressor housings is machined on week.
The noise of marine turbosupercharger compressor is mainly made of discrete noise and broadband noise, and discrete noise accounts for leading
Status, discrete noise are mainly generated by compressor, related to rotating speed of gas compressor, lobe numbers, diffuser number.It is practical new at this
In type, the quantity and volume of resonant cavity 8, the quantity of rectangular channel 9 and size are all the spectrum signatures according to turbocharger noise
It is selected, i.e., emulation or experimental test is carried out to the noise of supercharger air compressor first, obtain the noise of noise elimination object
Spectrum signature；Secondly, designing structure of resonant cavity according to previous experiences, and the transmitting loss and flow losses of muffler are calculated, then
In conjunction with compressor noise spectrum signature optimize special frequency channel under sound deadening capacity and noise elimination bandwidth, determine resonant cavity 8 quantity and
Volume, the quantity and size of rectangular channel 9.
Marine low speed diesel engine axis stream supercharger air compressor exit silencer provided by the utility model, due to passing through connection
Flange 3 and supporting positioning member 5 are mounted in the exhaust duct of compressor housings 2, therefore, do not increase the bulk of booster, nothing
The connecting pipe of diesel engine and booster need to be changed, do not increase the cost of diesel engine and with the examination period, can be effectively reduced peculiar to vessel
The high frequency pneumatic noise that low speed machine supercharger air compressor generates, after installing the utility model, booster noise can effectively reduce 3--
5dB。
In order to optimize the acoustic attenuation performance of resonant cavity 8 at different frequencies, by the width design of each resonant cavity 8 at different
It causes, to adjust best deadening frequency band position.
Outside pipeline 4 can be made cone, and the diameter close to 3 one end of connecting flange is bigger than the diameter of the other end, to change
Become the space of resonant cavity 8, convenient for optimization special frequency channel acoustic attenuation performance.
In order to further increase the noise elimination effect of high frequency, quieter material is separately filled in each resonant cavity 8.
More than, only specific embodiment of the present utility model, but protection scope of the utility model is not limited thereto,
Anyone skilled in the art within the technical scope disclosed by the utility model, can readily occur in variation or replace
It changes, should be covered within the scope of the utility model.Therefore, the protection scope of the utility model should be with claim
Subject to protection scope.
Claims (5)
1. a kind of marine low speed diesel engine axis stream supercharger air compressor exit silencer, is inserted into the exhaust duct of compressor housings
It is interior characterized by comprising connecting flange, outside pipeline, inside pipeline, supporting positioning member and support plate, the outside pipeline
Positioned at the inside pipeline outside and with the inner wall of the exhaust duct there are certain interval, the connecting flange and the outside
One end welding of pipeline, the inside pipeline, the other end of the supporting positioning member and the outside pipeline, the inside pipeline
Cavity is collectively formed in welding, and the cavity in the cavity, is divided at least two resonant cavities by the support plate welding,
The connecting flange and the outlet of the compressor housings are bolted to connection, the supporting positioning member and the compressor
Shell clamping, is machined with the rectangular channel that the resonant cavity is connected with the exhaust duct on the circumference of the inside pipeline.
2. marine low speed diesel engine axis stream supercharger air compressor exit silencer as described in claim 1, which is characterized in that every
The thickness of a resonant cavity is 5-15mm.
3. marine low speed diesel engine axis stream supercharger air compressor exit silencer as claimed in claim 2, which is characterized in that every
A resonant cavity it is of different size.
4. marine low speed diesel engine axis stream supercharger air compressor exit silencer as claimed in any one of claims 1-3,
It is characterized in that, is separately filled with deadener in each resonant cavity.
5. marine low speed diesel engine axis stream supercharger air compressor exit silencer as described in claim 1, which is characterized in that institute
Outside pipeline is stated as cone, and is greater than the diameter of the other end close to the diameter of described connecting flange one end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920344869.6U CN209557352U (en) | 2019-03-19 | 2019-03-19 | Marine low speed diesel engine axis stream supercharger air compressor exit silencer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920344869.6U CN209557352U (en) | 2019-03-19 | 2019-03-19 | Marine low speed diesel engine axis stream supercharger air compressor exit silencer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209557352U true CN209557352U (en) | 2019-10-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920344869.6U Active CN209557352U (en) | 2019-03-19 | 2019-03-19 | Marine low speed diesel engine axis stream supercharger air compressor exit silencer |
Country Status (1)
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| CN (1) | CN209557352U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021128579A1 (en) * | 2019-12-25 | 2021-07-01 | 南京磁谷科技股份有限公司 | Double-exhaust-outlet silencing box for magnetic levitation blower |
| CN115143085A (en) * | 2022-08-15 | 2022-10-04 | 哈尔滨工程大学 | Air inlet bypass recirculation structure with noise elimination effect |
-
2019
- 2019-03-19 CN CN201920344869.6U patent/CN209557352U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021128579A1 (en) * | 2019-12-25 | 2021-07-01 | 南京磁谷科技股份有限公司 | Double-exhaust-outlet silencing box for magnetic levitation blower |
| CN115143085A (en) * | 2022-08-15 | 2022-10-04 | 哈尔滨工程大学 | Air inlet bypass recirculation structure with noise elimination effect |
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