CN203515734U - Composite silencer - Google Patents
Composite silencer Download PDFInfo
- Publication number
- CN203515734U CN203515734U CN201320597921.1U CN201320597921U CN203515734U CN 203515734 U CN203515734 U CN 203515734U CN 201320597921 U CN201320597921 U CN 201320597921U CN 203515734 U CN203515734 U CN 203515734U
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- CN
- China
- Prior art keywords
- expansion chamber
- half expansion
- silencing
- resistive
- channel
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- Expired - Lifetime
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Abstract
The utility model discloses a composite silencer. The composite silencer comprises a silencing tube body, wherein a perforated plate used for dividing the interior of the silencing tube body into a silencing channel and a silencing material filling area is arranged in the silencing tube body, the silencing material filling area is filled with silencing materials, the interior of the silencing channel is divided into a first half expansion chamber, a resistive channel and a second half expansion chamber, the first half expansion chamber, the resistive channel and the second half expansion chamber are communicated in sequence, an inlet is formed in the first half expansion chamber, an outlet is formed in the second half expansion chamber, noise enters the silence from the inlet along with air flow, expansion silencing is conducted in the first half expansion chamber, then the air flow passes through the resistive channel, the noise which is spread along the channel is absorbed continuously by the silencing materials and then is attenuated gradually, the air flow passing through the resistive channel enters the second half expansion chamber, expansion silencing is conducted for another time, and then the air flow is discharged into the atmosphere. Due to the structure, a half expansion chamber-resistive channel-half expansion chamber combination form is achieved, the advantages of multiple forms are combined, and as a result, the composite silencer has the advantages of being suitable for noise with a wide frequency range, stable in effect, capable of saving manufacturing cost and reducing cost.
Description
Technical field
The utility model relates to a kind of composite muffler.
Background technique
As the unwanted sound general name of the mankind---noise, involve a wide range of knowledge, be almost penetrated into each industry, along with the development of the modern industry, noise pollution produces and comprises that the multiple impact of physiology and psychology is also more and more serious the mankind.Noise Characteristic in society is diversified, source is also diversified, for these character, the different noise of originating, several processing modes below adopt more: sqouynd absorption lowering noise, sound insulation and noise reducing, noise elimination noise reduction and vibration insulation and noise reduction etc., or multiple combination mode is administered.
The present invention is mainly from the viewpoint of noise elimination, and improves and go out in conjunction with some ways of sound absorption aspect.
Silencing apparatus is a kind of prevention noise transmission, and a kind of device that air-flow also can pass through is smoothly placed on the air-flow path of aerodynamic force equipment, can reduce the pneumatic noise of this equipment.
Silencing apparatus is of a great variety at present, by noise-cancelling theory, divides:
1, dissipative muffler: dissipative muffler is to utilize the sound-absorbing porous material of the internal surface of the air-flow path that is laid in to absorb acoustic energy.
When external sound wave is propagated along silencing channel, the air molecule on tube wall in porous material vibrates because being energized, and is subject to surface friction drag effect, makes acoustic energy become heat energy and reaches noise elimination noise reduction.Dissipative muffler is generally applicable to eliminate wider medium, high frequency sound, especially ear-piercing high frequency sound, and the changeable system of narrow frequency (as flow velocity changes the frequency change causing), damages and requires little place resistance but be unfavorable for installing.
2, reactive muffler: based on acoustic-electric filtering principle, appropriately combined by acoustic resistances different in baffler, acoustic compliance, acoustical mass, makes the noise of some characteristic frequency in passage, is reflected back sound source, or obtain significantly and absorb, reach the object of noise elimination.
During reactive muffler is applicable to, low frequency, especially have the device systems of voicing, but its total sectional area is enough large with the ratio of effective channel cross-sectional area, conventionally will reach 6 ~ 12 times, could in wider frequency range, play effective noise elimination effect.
3, diffusion silencing apparatus: be provided with many apertures on wall, air-flow, after small hole injection, slows down by step-down, reaches the object of noise elimination.
4, buffering type silencing apparatus: utilize the hindrance function of perforated tube and chamber, stream of pulses is converted to the silencing equipment of level and smooth stream.
5, interference type silencing apparatus: the principle of interference that utilizes ripple, on air-flow path, load onto a bypass tube, part acoustic energy branches in bypass tube, and the length of bypass pipe range L2 and the long L1 in air-flow main passage is through the calculating of the corresponding wavelength of crest frequency, makes to lead, to locate wavelength identical gathering for the sound wave in by-pass, single spin-echo, in propagation process, two ripples mutually weaken or cancel out each other, and reach noise elimination object.
6, impedance muffler: be a kind of form that dissipative muffler and reactive muffler are combined, basic structure has: expansion chamber-resistive is compound, resonant cavity-resistive compound, resonance-expansion chamber-resistive compound, resistive-expansion-buffering type is compound.
It is wider that impedance muffler frequency is applicable to scope, but above-mentioned 4 kinds of basic structure forms, and complex structure, technological requirement be high, while taking a lot of work, should not be too large, moist at flow velocity, use in the environment of the gas that is corrosive.
Large for some noise frequency scopes, have the changeable system that basic, normal, high frequency range is affected by the factors such as flow velocity simultaneously, for resistance, damage the place that has again specific (special) requirements, the silencing apparatus of single form can not meet the requirement of noise elimination noise reduction, at present, adopt above-mentioned the 6th kind of impedance composite muffler to solve this more, but due to complicated its fabricating cost that increases in its structural type, affect the many factors of soundproof effect, effect is difficult to control.
Model utility content
The technical problems to be solved in the utility model is to provide a kind of composite muffler.
The utility model solves the technological scheme that its technical problem adopts: composite muffler, it comprises noise elimination body, in described noise elimination body, be provided with and will in noise elimination body, be divided into the perforated plate of silencing channel and muffler material fill area, described muffler material fill area is filled full muffler material, the inside of described silencing channel is divided into successively the first half expansion chamber that are communicated with, resistive passage and the second half expansion chamber, described the first half expansion chamber are provided with import, and described the second half expansion chamber are provided with outlet.
Be further used as the improvement of technical solutions of the utility model, the two ends of described silencing channel are respectively arranged with Inserting Tube and tail pipe, and described Inserting Tube is communicated with the first half expansion chamber by import, and described tail pipe is communicated with the second half expansion chamber by outlet.
Be further used as the improvement of technical solutions of the utility model, the diameter of described Inserting Tube equals the internal diameter of import, and the diameter of described tail pipe equals the internal diameter of outlet.
Be further used as the improvement of technical solutions of the utility model, the direction of the internal diameter of described the first half expansion chamber along import to resistive passage diminishes successively, and the direction of the internal diameter of described the second half expansion chamber along resistive passage to outlet becomes large successively.
Be further used as the improvement of technical solutions of the utility model, described the first half expansion chamber are provided with a plurality of flexuoses, described the second half expansion chamber be provided with a plurality of flexuoses.
Be further used as the improvement of technical solutions of the utility model, the shape of described resistive passage is consistent with sinusoidal shape.
Be further used as the improvement of technical solutions of the utility model, the joint of described the first half expansion chamber and resistive passage arranges arc and draws pipe in, and the joint of described the second half expansion chamber and resistive passage arranges arc expanding duct.
The beneficial effects of the utility model: the utility model is divided into successively the first half expansion chamber that are communicated with, resistive passage and the second half expansion chamber by the inside at silencing channel, noise enters from the import of the first half expansion chamber with air-flow, in the first half expansion chamber, expand and eliminate the noise, air-flow is again through resistive passage, make constantly by sound-absorbing material, to be absorbed and decay gradually along the noise of channels spread, air-flow by resistive passage enters the second half expansion chamber, expands and eliminates the noise again, through outlet, entering atmosphere.
Such structure, has realized the novel three sections of compound combining forms of half expansion chamber-resistive-half expansion chamber, combines the advantage of various ways, makes the applicable noise frequency scope of this silencing apparatus wide, effect stability, meanwhile, and can saving construction cost, reduce costs; Zigzag expansion chamber has reduced inwall to the sonic reflection of making an uproar, and has increased interference, has strengthened treatment effect, reduces the specification of equipment, reduces costs.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Embodiment
With reference to Fig. 1, composite muffler, it comprises noise elimination body, in described noise elimination body, be provided with and will in noise elimination body, be divided into the perforated plate of silencing channel and muffler material fill area, described muffler material fill area is filled full muffler material 6, the inside of described silencing channel is divided into successively the first half expansion chamber 2 that are communicated with, resistive passage 3 and the second half expansion chamber 4, and described the first half expansion chamber 2 are provided with import, and described the second half expansion chamber 4 are provided with outlet.
The two ends of described silencing channel are respectively arranged with Inserting Tube 1 and tail pipe 5, and described Inserting Tube 1 is communicated with the first half expansion chamber 2 by import, and described tail pipe 5 is communicated with the second half expansion chamber 4 by outlet.
The diameter of described Inserting Tube 1 equals the internal diameter of import, the diameter of described tail pipe 5 equals the internal diameter of outlet, the direction of the internal diameter of described the first half expansion chamber 2 along import to resistive passage 3 diminishes successively, and the direction of the internal diameter of described the second half expansion chamber 4 along resistive passage 3 to outlet becomes large successively.
Described the first half expansion chamber 2 are provided with a plurality of flexuoses, described the second half expansion chamber 4 be provided with a plurality of flexuoses.
The shape of described resistive passage 3 is consistent with sinusoidal shape, and certainly, the shape of resistive passage 3 can be the shape of knowing each other with sinusoidal shape by shift design.
The joint of described the first half expansion chamber 2 and resistive passage 3 arranges arc and draws pipe 20 in, described the second half expansion chamber 4 arrange arc expanding duct 40 with the joint of resistive passage 3, noise enters from the Inserting Tube 1 in left side with air-flow, by Inserting Tube, in the first half expansion chamber 2, form the pipeline section that connects the abrupt change of cross-section, thereby make acoustic impedance mismatch, the phenomenons such as the sound wave that makes some reflects in the interface of acoustic impedance sudden change, interference, thus reach the object of noise elimination.
In order to reduce such reflection, strengthen the number of times of interfering, frequency, reach and reduce equipment size, raise the efficiency, strengthen effect, therefore on the surrounding inwall of the first half expansion chamber 2 of routine, form certain zigzag fashion and repave sound-absorbing material that pad one deck separates by perforated plate and form unique strong chamber of partly expanding, air-flow is again through resistive passage 3, resistive passage 3 is fixed on by sound-absorbing material 6 the pipeline perisporium that perforated plate that air-flow passes through forms, strengthen the near sinusoidal radian of resistive passage 3 simultaneously, increase noise contacts with absorbent material, according to resistance noise reduction principle, when sound wave enters after resistive passage 3, just cause air and fiber vibration in the interior porous material of resistive passage 3, due to surface friction drag and viscous resistance, make a part of acoustic energy be converted into heat energy and lose, play noise elimination effect, this place is in conjunction with tubular type harmony streaming feature, greatly simplify acoustic streaming formula structure, reduce cost, make along in channels spread, high-frequency noise is constantly absorbed by sound-absorbing material 6 and decay gradually, noise by resistive passage 3 enters the second half expansion chamber 5, its structure and the first half identical formation half expansion chamber of expansion chamber 2, expansion is shunk and is eliminated the noise through tail pipe after eliminating the noise again, remove the noise of some residual frequency scope, increase treatment effect, tail pipe 5 finally by silencing apparatus enters atmosphere.
Certainly, the utility model is created and is not limited to above-mentioned mode of execution, those of ordinary skill in the art also can make equivalent variations or replacement under the prerequisite without prejudice to the utility model spirit, and the modification that these are equal to or replacement are all included in the application's claim limited range.
Claims (7)
1. composite muffler, it is characterized in that: it comprises noise elimination body, in described noise elimination body, be provided with and will in noise elimination body, be divided into the perforated plate of silencing channel and muffler material fill area, described muffler material fill area is filled full muffler material, the inside of described silencing channel is divided into successively the first half expansion chamber that are communicated with, resistive passage and the second half expansion chamber, described the first half expansion chamber are provided with import, and described the second half expansion chamber are provided with outlet.
2. composite muffler according to claim 1, is characterized in that: the two ends of described silencing channel are respectively arranged with Inserting Tube and tail pipe, and described Inserting Tube is communicated with the first half expansion chamber by import, and described tail pipe is communicated with the second half expansion chamber by outlet.
3. composite muffler according to claim 2, is characterized in that: the diameter of described Inserting Tube equals the internal diameter of import, and the diameter of described tail pipe equals the internal diameter of outlet.
4. composite muffler according to claim 1 and 2, is characterized in that: the direction of the internal diameter of described the first half expansion chamber along import to resistive passage diminishes successively, and the direction of the internal diameter of described the second half expansion chamber along resistive passage to outlet becomes large successively.
5. composite muffler according to claim 4, is characterized in that: described the first half expansion chamber are provided with a plurality of flexuoses, described the second half expansion chamber be provided with a plurality of flexuoses.
6. composite muffler according to claim 1 and 2, is characterized in that: the shape of described resistive passage is consistent with sinusoidal shape.
7. composite muffler according to claim 1 and 2, is characterized in that: the joint of described the first half expansion chamber and resistive passage arranges arc and draws pipe in, and the joint of described the second half expansion chamber and resistive passage arranges arc expanding duct.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320597921.1U CN203515734U (en) | 2013-09-23 | 2013-09-23 | Composite silencer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320597921.1U CN203515734U (en) | 2013-09-23 | 2013-09-23 | Composite silencer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203515734U true CN203515734U (en) | 2014-04-02 |
Family
ID=50374678
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320597921.1U Expired - Lifetime CN203515734U (en) | 2013-09-23 | 2013-09-23 | Composite silencer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203515734U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104153851A (en) * | 2014-07-29 | 2014-11-19 | 芜湖天金机械有限公司 | Small automotive silencer and compound corrosion prevention for surfaces thereof |
| CN105298589A (en) * | 2015-11-18 | 2016-02-03 | 合肥汇凌汽车零部件有限公司 | Silencer for automobile gasoline internal combustion engine |
-
2013
- 2013-09-23 CN CN201320597921.1U patent/CN203515734U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104153851A (en) * | 2014-07-29 | 2014-11-19 | 芜湖天金机械有限公司 | Small automotive silencer and compound corrosion prevention for surfaces thereof |
| CN105298589A (en) * | 2015-11-18 | 2016-02-03 | 合肥汇凌汽车零部件有限公司 | Silencer for automobile gasoline internal combustion engine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200729 Address after: 523726 Guangdong city of Dongguan Province Huang Tamura Fuqiang Street No. 5 in Zhenlong. Patentee after: Dongguan City Hengchun Environmental Services Ltd. Address before: 523765 Guangdong city of Dongguan Province Huang Tamura Fuqiang Street No. 5 in Zhenlong. Patentee before: Zhang Chunhui |
|
| TR01 | Transfer of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140402 |
|
| CX01 | Expiry of patent term |