CN207363792U - A kind of extremely low fluid pressure loss composite construction denoising device for engine - Google Patents
A kind of extremely low fluid pressure loss composite construction denoising device for engine Download PDFInfo
- Publication number
- CN207363792U CN207363792U CN201720677686.7U CN201720677686U CN207363792U CN 207363792 U CN207363792 U CN 207363792U CN 201720677686 U CN201720677686 U CN 201720677686U CN 207363792 U CN207363792 U CN 207363792U
- Authority
- CN
- China
- Prior art keywords
- hole pipe
- micropore
- composite construction
- pipe
- denoising device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Exhaust Silencers (AREA)
Abstract
The utility model discloses a kind of extremely low fluid pressure loss composite construction denoising device for engine, including the ventilation shaft at composite construction denoising device both ends is connected to, the composite construction denoising device includes micropore noise reduction mechanism and bending noise reducing mechanism；The micropore noise reduction mechanism is formed by connecting using the micropore tube body splicing of multisection type, if every section of micropore tube body includes the nestable dried layer internal layer hole pipe set and one layer of outer layer is managed in fact, ventilation hole pipe is provided with wherein one layer of internal layer hole pipe；Microcellular structure is both provided with the internal layer hole pipe and ventilation hole pipe；The bending noise reducing mechanism includes outer layer reality bend pipe using bending tube body, bending tube body, and the internal layer draft bend hole pipe being arranged in outer layer reality bend pipe.The composite construction denoising device of the utility model, structure is relatively easy, easy for installation, excellent noise reduction effect and has extremely low fluid pressure loss.
Description
Technical field
The utility model belongs to engine breathing pipeline and ventilation shaft noise reduction process technical field, and in particular to a kind of
Extremely low fluid pressure loss composite construction denoising device for engine.
Background technology
Engine breathing pipeline and ventilation shaft can be formed about exceeding during normal use in pipeline inlet and outlet
The high-decibel noise of environmental noise standard, and then the normal life of the working environment, the surrounding common people to employee has some impact on,
The particularly noise source with low frequency noise feature due to being difficult to noise reduction, such as:Industrial engine exhaust noise, its influence are listened
Power is more serious with living.In order to reduce noise pollution, in engine intake and exhaust system and exhaust duct, it is necessary to add silencer
Etc denoising device.Silencer is usually located at the port section of air inlet system and exhaust system respectively.Normally, silencer includes a shell
Body, an expanding chamber are located therein, and outlet is exported from the expanding chamber.Presently, damaged to increase voice transmission
Lose, the silencer of single kind design usually requires to construct silencer considerably long or that construction is complicated.Such construction is relatively
More spaces are needed to also increase the pressure loss and increase energy consumption of fluid at the same time.
For another technical standpoint, in order to reduce the pressure loss of fluid, traditional silencer uses penetrating pattern substantially
Rectilinear form design, or the matrix form being composed with the rectilinear form silencer of the penetrating pattern of multilayer.But by
It is limited to the feature of sound transmission, the noise reduction frequency range of single kind of type of design silencer has its limitation first in the sky, such as：
The upper cut-off frequency of silencer is the 1.85* velocities of sound/gas channel diameter, and the lower-cut-off frequency of silencer is 0.225* sound
Fast * (gas channel sectional area/(expansion building volume * expanding chambers length)) ^1/2, the resistive or reactive muffler of this type only have
There is the noise reduction that local frequency is wide, poor for the noise reduction of low frequency and high frequency, the noise reduction if necessary to improve low frequency then must
The length of silencer must be significantly increased or increase the complexity of structure, so that what increases fluid pressure loss, in practice not
Reality.
Utility model content
The purpose of this utility model is that：For problems of the prior art, there is provided a kind of pole for engine
Low fluid pressure loss composite construction denoising device, length is short, simple in structure, has broadband anti-acoustic capability, it may have extremely low
Fluid pressure loss characteristic.
To achieve these goals, the technical solution adopted in the utility model is：
A kind of extremely low fluid pressure loss composite construction denoising device for engine, including it is connected to composite construction drop
Make an uproar the ventilation shaft at device both ends, the composite construction denoising device includes micropore noise reduction mechanism and bending noise reducing mechanism；
The micropore noise reduction mechanism is formed by connecting using the micropore tube body splicing of multisection type, and every section of micropore tube body includes folded
If dried layer internal layer hole pipe and one layer of outer layer that set is set are managed in fact, ventilation hole pipe is provided with wherein one layer of internal layer hole pipe；It is described
Internal layer hole pipe and ventilation hole pipe on be both provided with microcellular structure；
For the bending noise reducing mechanism using bending tube body, bending tube body includes outer layer reality bend pipe, and is arranged on outer layer
Internal layer draft bend hole pipe in real bend pipe；
Described ventilation hole pipe one end is connected with ventilation shaft, the other end and internal layer draft bend hole pipe connect, and internal layer leads to
The windbend pore pipe other end is connected with ventilation shaft；
Between 1mm-2mm, micropore punching rate has the micropore size of the microcellular structure between 2%-0.02%
The orifice plate thickness of micropore is between 1mm-2mm.
Preferably, the ventilation hole pipe is arranged in the internal layer hole pipe of innermost layer.
Preferably, along the direction of wind flow, the micropore noise reduction mechanism is arranged on front end, bending noise reducing mechanism is arranged on
Rear end.
Preferably, along the direction of wind flow, the bending noise reducing mechanism is arranged on front end, micropore noise reduction mechanism is arranged on
Rear end.
Preferably, the ventilation hole pipe is provided with some groups, and internal layer draft bend hole pipe is provided with and ventilation hole pipe phase
With quantity and one by one splicing connection, and have the connection of connection ventilation shaft and ventilation hole pipe in the end set of micropore noise reduction mechanism
Chamber, the end for bending noise reducing mechanism are also equipped with the connection chamber of connection ventilation duct and internal layer draft bend hole pipe.
Preferably, the outer layer reality pipe of described every section micropore tube body is more than the reducing of other end diameter using one end diameter
Structure.
Preferably, the bending tube body is formed by connecting using multi-segment structure splicing.
Preferably, the angle of bend of the bending tube body is not less than 60 °.
By adopting the above-described technical solution, the beneficial effects of the utility model are：
The extremely low fluid pressure loss composite construction denoising device for engine of the utility model, using micropore noise reduction
Mechanism and the composite structure of bending noise reducing mechanism, can effectively reduce intermediate frequency and low frequency noise by micropore noise reduction mechanism, lead to
Crossing bending noise reducing mechanism effectively reduces the noise of high frequency and intermediate frequency, so as to fulfill broadband noise reduction and the excellent noise reduction of high noise reduction
Performance, more one progress ground also have extremely low fluid pressure loss, can improve engine energy use efficiency and reduction is started
Machine disposal of pollutants.
Brief description of the drawings
Fig. 1 is the composite construction denoising device structure diagram of the embodiment 1 of the utility model.
Fig. 2 is the composite construction denoising device sectional view of the embodiment 1 of the utility model.
Fig. 3 is the composite construction denoising device structure diagram of the embodiment 2 of the utility model.
Fig. 4 is the micropore noise reduction mechanism structure schematic diagram of the embodiment 2 of the utility model.
Reference numeral：1- micropore noise reductions mechanism, 11- ventilation hole pipes, 12- internal layers hole pipe, 13- outer layers are managed in fact, 2- bending drops
Make an uproar mechanism, 21- outer layer reality bend pipes, 22- internal layer draft bends hole pipe, 23- sound-absorbing material layers, 3- connection chambers.
Embodiment
Embodiment 1：
With reference to Fig. 1-2, the extremely low fluid pressure loss composite construction denoising device of the present embodiment, including it is connected to composite junction
The ventilation shaft at structure denoising device both ends, the composite construction denoising device include micropore noise reduction mechanism 1 and bending noise reduction machine
Structure 2.
Micropore noise reduction mechanism 1 is formed by connecting using the micropore tube body splicing of multisection type, and every section of micropore tube body includes nestable set
If the dried layer internal layer hole pipe 12 and one layer of outer layer reality pipe 13 put, ventilation hole pipe 11 is provided with wherein one layer of internal layer hole pipe 12；
Microcellular structure is both provided with the internal layer hole pipe 12 and ventilation hole pipe 11.Internal layer hole pipe 12, which is set, in the present embodiment only sets
It is equipped with one layer, naturally it is also possible to which two layers or multilayer are set, and ventilation hole pipe 11 is arranged in the internal layer hole pipe 12 of innermost layer, works as hair
When in the ventilation hole pipe 11 that the intake and exhaust pipeline of motivation or the distinguished and admirable of ventilation shaft enter micropore noise reduction mechanism 1, by with
During the ventilation hole pipe 11 of microcellular structure and the internal layer hole pipe 12 with microcellular structure realize micropore noise reduction, and main noise reduction frequency is
Low frequency.
The thickness of the internal layer ventilation bent hole pipe is 1mm-2mm, aperture 1mm-2mm, percent opening 0.01%-
1.5%；The thickness of the middle noise elimination bent hole pipe is 1mm-2mm, aperture 1mm-2mm, percent opening 0.01%-
1.5%.Ventilation hole pipe 11 is arranged in the internal layer hole pipe 12 of innermost layer in the present embodiment, naturally it is also possible to is set to other layers
The solid Kong Guanzhong in inner side.
It is straight that the outer layer reality pipe 13 of every section of micropore tube body of the utility model can also use one end diameter to be more than other end
The variable-diameter structure in footpath.
Noise reducing mechanism 2 is bent using bending tube body, bending tube body includes outer layer reality bend pipe 21, and to be arranged on outer layer curved in fact
Internal layer draft bend hole pipe 22 in pipe 21, when it is distinguished and admirable be flowed into internal layer draft bend hole pipe 22 when, noise reduction is realized by bend pipe,
Main noise reduction frequency is medium-high frequency.The angle of bend for bending tube body is not less than 60 °, and noise reduction is more preferably.Bending tube body can also
It is formed by connecting using multi-segment structure splicing.Sound absorber is additionally provided between outer layer reality bend pipe 21 and internal layer draft bend hole pipe 22
The bed of material 23, effectively improves noise reduction.
11 one end of ventilation hole pipe is connected with ventilation shaft, the other end and internal layer draft bend hole pipe 22 connect, internal layer ventilation
Pipe 22 other end in bend pipe hole is connected with ventilation shaft.Along the direction of wind flow, the micropore noise reduction mechanism 1 be arranged on front end,
Bending noise reducing mechanism 2 is arranged on rear end.It can certainly bend that noise reducing mechanism 2 is arranged on front end, micropore noise reduction mechanism 1 is arranged on
Rear end.
Ventilation shaft described in the utility model is mainly the pipe of the intake and exhaust pipeline and draught effect that include engine
Road, is passing through design after between 50Hz-8000Hz by micropore noise reduction mechanism 1 and the composite construction for bending noise reducing mechanism 2
Insertion loss may be up to more than 40dB, have broadband noise reduction and the excellent anti-acoustic capability of high noise reduction, and more one progress ground also has
There is extremely low fluid pressure loss characteristic, engine energy use efficiency can be improved and reduce engine disposal of pollutants.
The composite construction denoising device structure of the utility model is relatively easy, easy for installation, ingenious can utilize existing bend
Device, by its it is value added be designed as that there is excellent decrease of noise functions, and structural volume of the present invention is small, light-weight, materials'use efficiency
It is high.
Embodiment 2：
With reference to Fig. 3, Fig. 4, the present embodiment in place of the difference of embodiment 1 with being：
Ventilation hole pipe 11 is provided with some groups, internal layer draft bend hole pipe 22 be provided with 11 identical quantity of ventilation hole pipe simultaneously
Splicing connection one by one, and have the connection chamber of connection ventilation shaft and ventilation hole pipe 11 in the end set of micropore noise reduction mechanism 1
3, the end of bending noise reducing mechanism 2 is also equipped with the connection chamber 3 of connection ventilation duct and internal layer draft bend hole pipe 22.This implementation
In example, ventilation hole pipe 11 is provided with three groups, and fluid pressure loss is small, excellent noise reduction effect.
Claims (8)
1. a kind of extremely low fluid pressure loss composite construction denoising device for engine, including it is connected to composite construction noise reduction
The ventilation shaft at device both ends, it is characterised in that the composite construction denoising device includes micropore noise reduction mechanism (1) and bending
Noise reducing mechanism (2)；
The micropore noise reduction mechanism (1) is formed by connecting using the micropore tube body splicing of multisection type, and every section of micropore tube body includes folded
If dried layer internal layer hole pipe (12) and one layer of outer layer that set is set manage (13) in fact, it is provided with wherein in one layer of internal layer hole pipe (12) logical
Air holes pipe (11)；Microcellular structure is both provided with the internal layer hole pipe (12) and ventilation hole pipe (11)；
The bending noise reducing mechanism (2) includes outer layer reality bend pipe (21) using bending tube body, bending tube body, and is arranged on outer
Internal layer draft bend hole pipe (22) in the real bend pipe (21) of layer；
Described ventilation hole pipe (11) one end is connected with ventilation shaft, the other end and internal layer draft bend hole pipe (22) connection, interior
Layer draft bend hole pipe (22) other end is connected with ventilation shaft；
For the micropore size of the microcellular structure between 1mm-2mm, micropore punching rate has micropore between 2%-0.02%
Orifice plate thickness between 1mm-2mm.
2. extremely low fluid pressure loss composite construction denoising device according to claim 1, it is characterised in that described is logical
Air holes pipe (11) is arranged in the internal layer hole pipe (12) of innermost layer.
3. extremely low fluid pressure loss composite construction denoising device according to claim 1, it is characterised in that along wind flow
Direction, the micropore noise reduction mechanism (1) be arranged on front end, bending noise reducing mechanism (2) be arranged on rear end.
4. extremely low fluid pressure loss composite construction denoising device according to claim 1, it is characterised in that along wind flow
Direction, the bending noise reducing mechanism (2) is arranged on front end, micropore noise reduction mechanism (1) is arranged on rear end.
5. extremely low fluid pressure loss composite construction denoising device according to claim 1, it is characterised in that described is logical
Air holes pipe (11) is provided with some groups, and internal layer draft bend hole pipe (22) is provided with quantity identical with ventilation hole pipe (11) and one by one
Splicing connection, and have the connection chamber of connection ventilation shaft and ventilation hole pipe (11) in the end set of micropore noise reduction mechanism (1)
(3), the end for bending noise reducing mechanism (2) is also equipped with the connection chamber of connection ventilation duct and internal layer draft bend hole pipe (22)
(3)。
6. extremely low fluid pressure loss composite construction denoising device according to claim 1, it is characterised in that described is every
Pipe (13) uses one end diameter more than the variable-diameter structure of other end diameter to the outer layer of Duan Weikong tube bodies in fact.
7. extremely low fluid pressure loss composite construction denoising device according to claim 1, it is characterised in that described is curved
Curved tube body is formed by connecting using multi-segment structure splicing.
8. extremely low fluid pressure loss composite construction denoising device according to claim 1, it is characterised in that described is curved
The angle of bend of curved tube body is not less than 60 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720677686.7U CN207363792U (en) | 2017-06-12 | 2017-06-12 | A kind of extremely low fluid pressure loss composite construction denoising device for engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720677686.7U CN207363792U (en) | 2017-06-12 | 2017-06-12 | A kind of extremely low fluid pressure loss composite construction denoising device for engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207363792U true CN207363792U (en) | 2018-05-15 |
Family
ID=62423843
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720677686.7U Active CN207363792U (en) | 2017-06-12 | 2017-06-12 | A kind of extremely low fluid pressure loss composite construction denoising device for engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207363792U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112728276A (en) * | 2020-12-24 | 2021-04-30 | 无锡双羊暖通设备有限公司 | Spiral duct tee bend protective housing |
| CN114127459A (en) * | 2019-07-22 | 2022-03-01 | 株式会社电装 | Sound absorbing device |
-
2017
- 2017-06-12 CN CN201720677686.7U patent/CN207363792U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114127459A (en) * | 2019-07-22 | 2022-03-01 | 株式会社电装 | Sound absorbing device |
| CN112728276A (en) * | 2020-12-24 | 2021-04-30 | 无锡双羊暖通设备有限公司 | Spiral duct tee bend protective housing |
| CN112728276B (en) * | 2020-12-24 | 2022-04-01 | 无锡双羊暖通设备有限公司 | Spiral duct tee bend protective housing |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN207363792U (en) | A kind of extremely low fluid pressure loss composite construction denoising device for engine | |
| CN201606994U (en) | Muffling air duct | |
| CN209557068U (en) | Impedance composite muffler | |
| CN205559018U (en) | Vehicle vent -pipe muffler | |
| CN205823380U (en) | A kind of automobile engine to exhaust deafener | |
| CN107120165A (en) | A kind of twin exhaust pipes silencer | |
| CN207634397U (en) | Ventilation silencer | |
| CN204627718U (en) | A kind of motor silencer | |
| CN204060859U (en) | A kind of exhaust silencer and automobile | |
| CN205896541U (en) | Device of making an uproar falls in bending | |
| CN103727075B (en) | A kind of impedance-compensated composite muffler of modular | |
| CN204254855U (en) | A kind of automotive air-conditioning system silencer for refrigerant line of automotive | |
| CN207033563U (en) | A kind of twin exhaust pipes silencer | |
| CN201284682Y (en) | Silencer structure | |
| CN110030061A (en) | A kind of racing car exhaust muffling device | |
| CN203202508U (en) | Pipeline air exhausting sound eliminator for nuclear power station | |
| CN202544965U (en) | Combined gasoline engine exhaust silencer for motorcycles | |
| CN104165450A (en) | Power recovery type tubular muffler | |
| CN206360934U (en) | A kind of composite muffler | |
| CN201521328U (en) | Dual-exhaust port silencer of diesel generator | |
| CN106894925A (en) | A kind of multi-cavity combination perforation silencer for eliminating vehicle Charge air inlet broadband noise | |
| CN207864881U (en) | A kind of high-efficient wide-frequency micropunch muffler pipe | |
| CN2871858Y (en) | Silencer for automobile | |
| CN209724676U (en) | Intake silencer on Roots blower | |
| CN207634893U (en) | A kind of winding type pipeline silencer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |