CN205841329U - The acoustic filter of turbocharger - Google Patents
The acoustic filter of turbocharger Download PDFInfo
- Publication number
- CN205841329U CN205841329U CN201620616578.4U CN201620616578U CN205841329U CN 205841329 U CN205841329 U CN 205841329U CN 201620616578 U CN201620616578 U CN 201620616578U CN 205841329 U CN205841329 U CN 205841329U
- Authority
- CN
- China
- Prior art keywords
- tube body
- section
- interior tube
- outer tube
- annular
- 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.)
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Links
- 230000030279 gene silencing Effects 0.000 claims abstract description 19
- 239000011358 absorbing material Substances 0.000 claims description 3
- 238000010521 absorption reaction Methods 0.000 claims 1
- 239000000463 material Substances 0.000 claims 1
- 230000008901 benefit Effects 0.000 abstract description 3
- 230000007704 transition Effects 0.000 abstract description 2
- 238000009434 installation Methods 0.000 description 3
- 230000008602 contraction Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000037237 body shape Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
Landscapes
- Supercharger (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The acoustic filter of turbocharger, including outer tube body and interior tube body；Outer tube body is the tubular of both ends open, and it is sleeved on outside interior tube body and is connected with interior tube body by two pieces of annular endplates, is provided with annular silencing cavity between interior tube body, outer tube body and two end plates；Interior tube body is provided with multiple sound attenuation hole being communicated to annular silencing cavity.The utility model has the advantages that, gas is when entering annular silencing cavity, interior tube body area of section is minimum with the ratio of outer tube body area of section, the gas of annular silencing cavity is after bloop is discharged, through conical section, interior tube body area of section increases with the ratio of outer tube body area of section, thus increases sound deadening capacity and frequency range；Air-flow is into and out of two conical sections through area of section gradually transition before and after bloop, and pneumatic noise is cut in.Outer tube body radial section is oval ring, compares existing cylinder deafener volume and significantly reduces, and matches with interior tube body and can form resonant cavity.
Description
Technical field
Utility model relates to a kind of acoustic filter, a kind of acoustic filter for turbocharger.
Background technology
Along with the extensive application of supercharger, the various noises that supercharger is brought gradually are paid attention to by user.Supercharger impeller
Pressure fluctuation can be produced in high-speed rotation.This pressure fluctuation is propagated along blower outlet to the pipeline of charge air cooler and is formed pressure
Power pulsating wave.Pulsating wave can cause tube wall vibration.The tube wall of vibration is by outside radiated noise, through compartment hole, body oscillating
It is delivered in passenger compartment, passenger and driver are produced interference.
Along with the low speed torque performance boost of internal combustion engine and lightweight and small-sized, the miniaturization of supercharger turns with high
Speedization design has become as industrial trend.The benefit that this change brings is it is clear that but also bringing serious noise asks
Topic.Wherein, the difficulty of governance of single order noise is bigger.
Single order noise is also synchronization noise, and its noise frequency is Tong Bu with supercharger speed, and this feature causes single order noise
Frequency range span is the broadest, and its noise mainly breaks out interval and raises along with the rising of supercharger speed.Tests prove that,
The pulsating wave that single order noise produces mainly outwardly is radiated by blower outlet pipeline.Deafener is installed at blower outlet
It is the means of a kind of effective suppression single order noise.
The outlet of small-sized supercharger air compressor uses integrated design, and its installation dimension is the compactest, leave setting of deafener for
Meter space is the narrowest and small.Design the pressure fluctuation that can effectively reduce blower outlet, disappearing of installation dimension requirement can be met again
Sound device difficulty is the biggest.
Utility model content
The purpose of utility model is to overcome the deficiencies in the prior art, and provides the acoustic filter of a kind of turbocharger.Its knot
Structure is the compactest, takes up room little, and it is connected in the outlet of small-sized supercharger air compressor, can effectively suppress single order noise.
The technical solution of the utility model is: the acoustic filter of turbocharger, including outer tube body and interior tube body；Outer tube body in
Both ends open tubular, it is sleeved on outside interior tube body and is connected with interior tube body by two pieces of annular endplates, interior tube body, outer tube body and
Annular silencing cavity it is provided with between two end plates；Interior tube body is provided with multiple sound attenuation hole being communicated to annular silencing cavity.
The further technical scheme of this utility model is: the radial section of outer tube body is oval ring.
The further technical scheme of this utility model is: the radial section of interior tube body is annular.
This utility model further technical scheme is: being provided with caliber contraction section in the middle part of interior tube body, it includes path section
Be connected to the conical section at path section two ends, the diameter of the diameter of footpath section one end less with conical section is consistent.
This utility model further technical scheme is: sound attenuation hole is positioned in path section.
This utility model further technical scheme is: be filled with sound-absorbing material in annular chamber.
This utility model has the advantage that
1, outer tube body one opening is connected on blower outlet, can effectively reduce the pressure fluctuation of blower outlet, make
The pulsating wave traveling to downstream is not enough to produce excessive noise.
2, gas is when entering annular silencing cavity, and interior tube body area of section is minimum with the ratio of outer tube body area of section
, the gas of annular silencing cavity is after bloop is discharged, through conical section, interior tube body area of section and outer tube body area of section
Ratio (divergence ratio) increases, thus increases sound deadening capacity and frequency range.
3, air-flow is into and out of two conical sections through area of section gradually transition before and after bloop, and pneumatic noise is cut
Subtract.
4, outer tube body radial section is oval ring.Compare existing cylinder deafener volume significantly to reduce, and with interior
Body matches and can form Helmholtz resonant cavity.
5, in frequency range 650～4400Hz transmission loss of the present utility model more than 10db, performance to electromotor
Almost without impact.
6, simple and compact for structure, take up room little, easy for installation.
Below in conjunction with figure and embodiment, utility model is further described.
Accompanying drawing explanation
Fig. 1 is the structural representation of embodiment 1；
Fig. 2 is the left view of Fig. 1
Fig. 3 is the A-A sectional view of Fig. 2；
Fig. 4 is the B-B sectional view of Fig. 1；
Fig. 5 is the structural representation of embodiment 2.
Detailed description of the invention
Embodiment 1:
As shown in figures 1-4: the acoustic filter of turbocharger, including outer tube body 1 and interior tube body 2.Outer tube body 1 is opened in two ends
Mouthful tubular, it is outer and be connected with interior tube body 2 by two pieces of annular endplates 3, interior tube body, outer tube body and two that it is sleeved on interior tube body 2
Annular silencing cavity 4 it is provided with between block end plate.Interior tube body 2 is provided with multiple sound attenuation hole 21 being communicated to annular silencing cavity 4.
Preferably, being provided with caliber contraction section in the middle part of interior tube body 2, it includes path section 221 and is connected to path section 221 two ends
Conical section 222, the diameter of the diameter of path section 221 one end less with conical section 222 is consistent.
Preferably, the radial section of outer tube body 1 is oval ring, and the radial section of interior tube body 2 is annular, itself and outer tube body
1 matches can form Helmholtz resonant cavity.
Preferably, multiple sound attenuation holes 21 are distributed in the path section 221 of interior tube body 2 ringwise, the diameter of sound attenuation hole 21 and close
Degree is determined by Helmholtz resonant cavity principle.
Preferably, the volume (height and length) of annular silencing cavity 4 is determined by Helmholtz resonant cavity principle.
Embodiment 2:
Referring to Fig. 5, the present embodiment compared with Example 1, differs only in, and is filled with sound-absorbing material 9 in annular silencing cavity,
This utility model is made to become the acoustic filter of impedance conjunction type.
The application of summary utility model: during assembling, interior tube body 2 inlet end is connected on blower outlet (open before outer tube body
Shape and the size of mouth end determine according to installing space), connect with charge air cooler or engine charge pipeline before the exhaust end of interior tube body 2
Connect (interior tube body open rearward end shape and connected mode determine) according to charge air cooler pipeline size.
Air-flow enters interior tube body from the inlet end of interior tube body 2, then enters annular silencing cavity 4, air-flow by bloop 21
In annular silencing cavity 4 after resonance, it is in the noise in the range of design frequency and dissolves into the air with the form of heat, pass through
The gas of resonance again passes by bloop 21 and enters interior tube body 2, discharges from the exhaust end of interior tube body 2.
Air-flow in annular silencing cavity 4, is in the noise in the range of design frequency and disappears with the form of heat after resonance
In atmosphere, the purpose of noise is reduced.
Claims (7)
1. the acoustic filter of turbocharger, is characterized in that, including outer tube body (1) and interior tube body (2)；Outer tube body (1) is opened in two ends
Mouthful tubular, its be sleeved on interior tube body (2) outward and pass through two pieces of annular endplates (3) be connected with interior tube body (2), interior tube body, outer tube
Annular silencing cavity (4) it is provided with between body and two end plates；Interior tube body (2) is provided with and multiple is communicated to annular the disappearing of silencing cavity (4)
Acoustic aperture (21).
2. the acoustic filter of turbocharger as claimed in claim 1, is characterized in that: the radial section of outer tube body (1) is ellipse
Annular.
3. the acoustic filter of turbocharger as claimed in claim 2, is characterized in that: the radial section of interior tube body (2) is annulus
Shape.
4. the acoustic filter of turbocharger as claimed in claim 2 or claim 3, is characterized in that: interior tube body (2) middle part is provided with caliber and receives
Contracting section, it includes path section (221) and is connected to the conical section (222) at path section (221) two ends, the diameter of path section (221)
Consistent with the diameter of conical section (222) less one end.
5. the acoustic filter of turbocharger as claimed in claim 4, is characterized in that: sound attenuation hole (21) is positioned at path section (221)
On.
6. the acoustic filter of the turbocharger as according to any one of claim 1,2,3,5, is characterized in that: annular silencing cavity
(4) sound-absorbing material it is filled with in.
7. the acoustic filter of turbocharger as claimed in claim 4, is characterized in that: be filled with sound absorption in annular silencing cavity (4)
Material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620616578.4U CN205841329U (en) | 2016-06-22 | 2016-06-22 | The acoustic filter of turbocharger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620616578.4U CN205841329U (en) | 2016-06-22 | 2016-06-22 | The acoustic filter of turbocharger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205841329U true CN205841329U (en) | 2016-12-28 |
Family
ID=58152678
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620616578.4U Active CN205841329U (en) | 2016-06-22 | 2016-06-22 | The acoustic filter of turbocharger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205841329U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105927594A (en) * | 2016-06-22 | 2016-09-07 | 湖南天雁机械有限责任公司 | Muffler of turbocharger |
-
2016
- 2016-06-22 CN CN201620616578.4U patent/CN205841329U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105927594A (en) * | 2016-06-22 | 2016-09-07 | 湖南天雁机械有限责任公司 | Muffler of turbocharger |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |