CN204253153U - A kind of internal combustion locomotive impedance composite muffler - Google Patents
A kind of internal combustion locomotive impedance composite muffler Download PDFInfo
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- CN204253153U CN204253153U CN201420700545.9U CN201420700545U CN204253153U CN 204253153 U CN204253153 U CN 204253153U CN 201420700545 U CN201420700545 U CN 201420700545U CN 204253153 U CN204253153 U CN 204253153U
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Abstract
The utility model provides a kind of internal combustion locomotive impedance composite muffler, comprise casing, casing is offered muffler inlet and muffler outlet, be installed with several length at housing interior volume and be 1200-1375 millimeter and perforation hush tube side by side, described perforation hush tube entrance point, outlet end communicate with muffler inlet, muffler outlet respectively, and perforation hush tube sectional area sum is 25000-38000 square millimeter.Preferably, described perforation hush tube Surface coating has silencing cotton.The utility model is by the impedance complex formula quieter manner of multiple flow passages, multi-chamber structure, the maximization of the noise reduction frequency spectrum of silencing apparatus can be realized in the confined space of 2160 × 1200 × 420, its exhaust resistance meets below the 4kPa required by motor, and noise reduction is controlled in more than 16dB (A), improve interchangeability and commonality that silencing apparatus applies on locomotive, there is the outstanding advantages such as structure is simple, integration is high, installation and maintenance are convenient.
Description
Technical field
The utility model relates to silencing apparatus technical field, especially relates to a kind of internal combustion locomotive impedance composite muffler.
Background technique
For the diesel exhaust gas noise reduction process of internal combustion locomotive, especially for the engine noise reduction process of power level at below 2000kW, the silencing apparatus that adopts is exhausted noise reduction more.Because the frequency spectrum of noise does not have rule, it propagates the restriction being also subject to several factors, and adjustment between restraining factors is shifting, add the physical property of sound wave self and the particularity of structure of locomotive, the noise reduction level making internal-combustion engine silencer for automobile reach higher, always is a difficult problem for acoustics circle and silencing apparatus technical field.
The common silencing apparatus of existing internal combustion locomotive, by the restriction of structure of locomotive, the headspace of its installation position is very limited, directly causes the overall dimensions of silencing apparatus must be limited in rational scope, thus the interchangeability causing silencing apparatus to install on locomotive and commonality poor.And under normal conditions, the overall dimensions of silencing apparatus is larger, its air displacement, noise abatement, heat-insulating capability etc. are all than being easier to meet usage requirement; But, if the overall dimensions of silencing apparatus because be subject to locomotive the restriction of installing space reserved and can not expand arbitrarily time, within the scope of rational overall dimensions, still its air displacement, noise abatement, heat-insulating capability etc. will be made can to meet usage requirement, and the way of unique feasible is exactly design the internal structure of silencing apparatus, calculate and test.As mentioned above, the irregularities of noise spectrum, Acoustic Wave Propagation are many and shifting etc. each other by restraining factors, and the silencing apparatus all making air displacement, noise abatement to be simultaneously met becomes the difficult problem that long-standing problem the engineers and technicians of silencing apparatus technical field.
Model utility content
The technical problems to be solved in the utility model is: for prior art Problems existing, a kind of internal combustion locomotive impedance composite muffler is provided, in the maximum effective coverage can only accomplishing 2160 × 1200 × 420 (units: millimeter) of the monnolithic case size of silencing apparatus, make its exhaust resistance at below 4kPa and noise reduction at more than 16dB (A).
The technical problems to be solved in the utility model realizes by the following technical solutions: a kind of internal combustion locomotive impedance composite muffler, comprise casing, described casing is offered muffler inlet and muffler outlet, described housing interior volume is installed with several length and is 1200-1375 millimeter and perforation hush tube side by side, described perforation hush tube entrance point, outlet end communicate with muffler inlet, muffler outlet respectively, and perforation hush tube sectional area sum is 25000-38000 square millimeter.
Preferably, between described perforation hush tube entrance point and muffler inlet and/or the cabinets cavity of boring a hole between hush tube outlet end and muffler outlet form expansion chamber, and bottom described expansion chamber, curved transition sections is set.
Preferably, described perforation hush tube is provided with 3-6 root.
Preferably, described perforation hush tube is square tubular or circular pipe.
Preferably, described perforation hush tube is equidistant arrangement.
Preferably, described perforation hush tube Surface coating has silencing cotton.
Preferably, arrange dividing plate between described perforation hush tube surface and cabinet wall, in the space that perforation hush tube and dividing plate limit, install silencing cotton, in the space that dividing plate and cabinet wall limit, filling with insulation material forms thermal-protective coating.
Preferably, described silencing cotton is pyroceram Nomex.
Preferably, described muffler outlet connects isolation net.
Preferably, described isolation net is steel wire.
Compared with prior art, the beneficial effects of the utility model are: according to the structural feature of locomotive header, reserve within the scope of installing space at the silencing apparatus of regulation, by adopting multiple flow passages, the impedance complex formula quieter manner of multi-chamber structure, achieve the maximization of the noise reduction frequency spectrum of silencing apparatus, when the monnolithic case size of silencing apparatus can only accomplish 2160 × 1200 × 420 (unit: millimeter), its exhaust resistance is under the prerequisite meeting below the 4kPa required by motor, noise reduction is controlled in more than 16dB (A), meet the usage requirement of locomotive to silencing apparatus completely, improve interchangeability and commonality that silencing apparatus applies on locomotive.
Accompanying drawing explanation
Fig. 1 is the plan view of a kind of internal combustion locomotive impedance composite muffler of the utility model.
Fig. 2 is the plan view of a kind of internal combustion locomotive impedance composite muffler of the utility model.
Fig. 3 is the left view of a kind of internal combustion locomotive impedance composite muffler of the utility model.
Fig. 4 is the partial enlarged drawing at A place in Fig. 1.
Mark in figure: foretell casing, 2-muffler outlet, 3-isolation net, 4-expansion chamber, 5-silencing cotton, 6-dividing plate, 7-link, 8-bores a hole hush tube, 9-thermal-protective coating, 10-transition part, 11-muffler inlet, 12-sewage draining exit, 13-mounting hole, 14-resistance measuring point, 15-mounting fastener, 16-keeps off the rain circle.
Embodiment
In order to make the purpose of this utility model, technological scheme and advantage clearly understand, below in conjunction with the drawings and specific embodiments, the utility model is described in detail.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
A kind of internal combustion locomotive impedance composite muffler as shown in Figure 1, Figure 2, Figure 3 shows, its entirety is the cuboid of 2160 × 1200 × 420 (units: millimeter), mainly comprise casing 1, position, relative both sides of the edge on described casing 1 offers several mounting holes 13, silencing apparatus is facilitated to be fixedly connected with the fitting seat on carbody canopy by bolt, opposite end on described casing 1 offers muffler inlet 11 and muffler outlet 2, and muffler inlet 11 is contrary with the opening direction of muffler outlet 2.Hush tube 8 of boring a hole is installed with in casing 1 inner chamber between muffler inlet 11 and muffler outlet 2, described perforation hush tube 8 entrance point, outlet end communicate with muffler inlet 11, muffler outlet 2 respectively, and between perforation hush tube 8 entrance point and muffler inlet 11, casing 1 inner chamber of boring a hole between hush tube 8 outlet end and muffler outlet 2 forms expansion chamber 4 respectively.Muffler inlet 11 on casing 1 is at one end provided with resistance measuring point 14, to monitor the stream pressure in the expansion chamber 4 entered from muffler inlet 11 between perforation hush tube 8 entrance point and muffler inlet 11.Isolation net 3 to be fixed on casing 1 by mounting fastener 15 by muffler outlet end and to cover muffler outlet 2, the circle 16 that keeps off the rain being set above isolation net 3 and being fixedly connected with casing 1, as shown in Figure 4.Described mounting fastener 15 can be stainless steel bolt, and described isolation net 3 adopts steel wire usually, adopts this detachable mounting structure both can prevent the foreign material of casing 1 outside from falling into silencing apparatus internal passage, and is convenient to the cleaning of silencing apparatus internal passage.Also be provided with sewage draining exit 12 at muffler outlet end, described sewage draining exit 12 communicates with the expansion chamber 4 between perforation hush tube 8 outlet end, muffler outlet 2, for discharging the rainwater or impurity particle that may fall into when locomotive stops.
Embodiment 1
As shown in Figure 1 and Figure 2, be installed with 5 length be 1200 millimeters and the perforation hush tube 8 arranged in parallel with equal sectional area in casing 1 inner space by link 7, the spacing between two adjacent perforation hush tubes 8 is 400 millimeters.Described perforation hush tube 8 entrance point, outlet end communicate with muffler inlet 11, muffler outlet 2 respectively, between perforation hush tube 8 entrance point and muffler inlet 11, casing 1 inner chamber of boring a hole between hush tube 8 outlet end and muffler outlet 2 forms expansion chamber 4 respectively, arranges curved transition sections 10 bottom described expansion chamber 4.When air-flow enters perforation hush tube 8 entrance point from muffler inlet 11, this air-flow is with the curved transition sections 10 counterclockwise by muffler inlet 11 top; When air-flow enters muffler outlet 2 through perforation hush tube 8, this air-flow is in a clockwise direction by the curved transition sections 10 bottom muffler outlet 2.5 perforation hush tubes 8 are wherein all square tubulars, also can adopt circular pipe.For convenience of explanation, the length of perforation hush tube 8 is designated as L, the sectional area sum of these 5 perforation hush tubes 8 is designated as S, value L=1200 millimeter, S=38000 square millimeter, after tested, the exhaust resistance of this silencing apparatus is less than 4kPa, and its noise reduction is 16dB (A); Under the condition keeping S=38000 square millimeter, during L < 1200 millimeters, its noise reduction will be less than 16dB (A).
Embodiment 2
Value L=1300 millimeter, S=30000 square millimeter, other are with embodiment 1.After tested, the exhaust resistance of this silencing apparatus is less than 4kPa, and its noise reduction is 17.3dB (A).
Embodiment 3
Value L=1300 millimeter, S=28000 square millimeter, other are with embodiment 1.After tested, the exhaust resistance of this silencing apparatus is less than 4kPa, and its noise reduction is 17.6dB (A).
Embodiment 4
Value L=1375 millimeter, S=25000 square millimeter, other are with embodiment 1.After tested, the exhaust resistance of this silencing apparatus is less than 4kPa, and its noise reduction is 18.1dB (A).But, under the condition keeping L=1375 millimeter, during S < 25000 square millimeters, although noise reduction can be larger, but its exhaust resistance will more than 4kPa, thus the resistance that can not meet engine calls is no more than the restrictive condition of 4kPa.
It should be noted that, described perforation hush tube 8 radical is set except above-mentioned 5, can also be 3,4 or 6, when hush tube 8 of boring a hole be 3 or 4 time, the spacing between adjacent two perforation hush tubes 8 can be greater than 400 millimeters; When hush tube 8 of boring a hole is 6, the spacing between two adjacent perforation hush tubes 8 is less than 400 millimeters.The value of above-mentioned L, S also can in the number range of setting combination in any, the test after combination shows, its exhaust resistance is all no more than 4kPa, and noise reduction fluctuates in 16-18.1dB (A) scope.
In order to improve the noise reduction of silencing apparatus further, can at perforation hush tube 8 Surface coating silencing cotton 5, described silencing cotton 5 is pyroceram Nomex, not only good muffling effect preferably, and user cost is low.Consider that perforation hush tube 8 is pipes that tube wall has some through holes, the high temperature gas flow flowing through perforation hush tube 8 may spray from these through holes, thus causes silencing apparatus external skin temperatures too high, is unfavorable for the noise reduction of silencing apparatus.For this reason, dividing plate 6 can be set between perforation hush tube 8 outer surface and casing 1 inwall, described dividing plate 6 is atresia plate objects, normal employing steel dividing plate, by dividing plate 6 by coated for whole perforation hush tubes 8, and installs silencing cotton 5 in the space that perforation hush tube 8 and dividing plate 6 limit, in the space that dividing plate 6 and casing 1 inwall limit, filling with insulation material forms thermal-protective coating 9, conventional thermal-protective material is silencing cotton, such as, and resistant to elevated temperatures glass Nomex etc.Because silencing cotton has noise reduction, heat-blocking action concurrently, adopt the silencing apparatus of this double thermal insulation structure, its resistance noise reduction part and thermal-protective coating part can meet noise elimination, the needs such as heat insulation simultaneously, and are conducive to the feature of environmental protection improving silencing apparatus.
Silencing apparatus of the present utility model is according to the structural feature of locomotive header, and based on box structure, external structure is simple, installation and maintenance are convenient, its internal structure is compact, and integration is high, is conducive to the maximum using of silencing apparatus to its installing space extremely limited on locomotive.Because motor commonly uses the main attenuation spectrum of reactive muffler at below 1000Hz medium and low frequency noise, newly-increased resistance noise reduction part can attenuation spectrum at each frequency range noise of below 8000Hz, medium-high frequency sound attenuation for more than 1000Hz is particularly evident, therefore, the noise of impedance complex to each frequency range has certain attenuation.On the basis of the physical property and propagating characteristic that take into full account sound wave self, by adopting the impedance complex formula quieter manner of multiple flow passages, multi-chamber, air displacement requirement can not only be met, and achieve the maximization of noise reduction frequency spectrum, the noise reduction demand that power level is no more than the motor of 2000kW can be met, improve the interchangeability of silencing apparatus on locomotive and commonality.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; it should be pointed out that all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection domain of the present utility model.
Claims (10)
1. an internal combustion locomotive impedance composite muffler, comprise casing (1), described casing (1) is offered muffler inlet (11) and muffler outlet (2), it is characterized in that: described casing (1) inner space is installed with several length and is 1200-1375 millimeter and perforation hush tube (8) side by side, described perforation hush tube (8) entrance point, outlet end communicate with muffler inlet (11), muffler outlet (2) respectively, and perforation hush tube (8) sectional area sum is 25000-38000 square millimeter.
2. internal combustion locomotive impedance composite muffler according to claim 1, it is characterized in that: between described perforation hush tube (8) entrance point and muffler inlet (11) and/or casing (1) inner chamber of boring a hole between hush tube (8) outlet end and muffler outlet (2) form expansion chamber (4), and described expansion chamber (4) bottom curved transition sections (10) is set.
3. the internal combustion locomotive impedance composite muffler according to claims 1 or 2, is characterized in that: described perforation hush tube (8) is provided with 3-6 root.
4. internal combustion locomotive impedance composite muffler according to claim 3, is characterized in that: described perforation hush tube (8) is square tubular or circular pipe.
5. internal combustion locomotive impedance composite muffler according to claim 3, is characterized in that: described perforation hush tube (8) is equidistant arrangement.
6. internal combustion locomotive impedance composite muffler according to claim 3, is characterized in that: described perforation hush tube (8) Surface coating has silencing cotton (5).
7. internal combustion locomotive impedance composite muffler according to claim 3, it is characterized in that: between described perforation hush tube (8) surface and casing (1) inwall, dividing plate (6) is set, in the space that perforation hush tube (8) and dividing plate (6) limit, install silencing cotton (5), in the space that dividing plate (6) and casing (1) inwall limit, filling with insulation material forms thermal-protective coating.
8. the internal combustion locomotive impedance composite muffler according to claim 6 or 7, is characterized in that: described silencing cotton (5) is pyroceram Nomex.
9. the internal combustion locomotive impedance composite muffler according to claims 1 or 2, is characterized in that: described muffler outlet (2) connects isolation net (3).
10. internal combustion locomotive impedance composite muffler according to claim 9, is characterized in that: described isolation net (3) is steel wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420700545.9U CN204253153U (en) | 2014-11-20 | 2014-11-20 | A kind of internal combustion locomotive impedance composite muffler |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420700545.9U CN204253153U (en) | 2014-11-20 | 2014-11-20 | A kind of internal combustion locomotive impedance composite muffler |
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| Publication Number | Publication Date |
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| CN204253153U true CN204253153U (en) | 2015-04-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420700545.9U Active CN204253153U (en) | 2014-11-20 | 2014-11-20 | A kind of internal combustion locomotive impedance composite muffler |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104405487A (en) * | 2014-11-20 | 2015-03-11 | 南车资阳机车有限公司 | Impedance composite muffler for internal combustion locomotives |
| CN105498366A (en) * | 2015-12-09 | 2016-04-20 | 无锡西源电力装备厂 | Steam-water separation equipment for power station auxiliary machine |
-
2014
- 2014-11-20 CN CN201420700545.9U patent/CN204253153U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104405487A (en) * | 2014-11-20 | 2015-03-11 | 南车资阳机车有限公司 | Impedance composite muffler for internal combustion locomotives |
| CN105498366A (en) * | 2015-12-09 | 2016-04-20 | 无锡西源电力装备厂 | Steam-water separation equipment for power station auxiliary machine |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 641301 Ziyang City, Sichuan province Yanjiang District CHENFENG Road No. six Patentee after: CRRC ZIYANG CO., LTD. Address before: 641301 Ziyang City, Sichuan province Yanjiang District CHENFENG Road No. six Patentee before: CSR Ziyang Locomotive Co., Ltd. |