CN112746879A - Tubular silencer for automobile - Google Patents
Tubular silencer for automobile Download PDFInfo
- Publication number
- CN112746879A CN112746879A CN202110002781.8A CN202110002781A CN112746879A CN 112746879 A CN112746879 A CN 112746879A CN 202110002781 A CN202110002781 A CN 202110002781A CN 112746879 A CN112746879 A CN 112746879A
- Authority
- CN
- China
- Prior art keywords
- pipe
- muffler
- plug
- automobile
- silencing
- 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.)
- Pending
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N1/00—Silencing apparatus characterised by method of silencing
- F01N1/02—Silencing apparatus characterised by method of silencing by using resonance
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/18—Construction facilitating manufacture, assembly, or disassembly
- F01N13/1805—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Silencers (AREA)
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
Abstract
The invention provides a tubular muffler for an automobile, wherein a muffler pipe and a vent pipe are connected together through a three-way joint, the tail end of the muffler pipe is provided with a plug, the length of the muffler pipe meets the formula L (2n-1) c/4 lambda, wherein n is 1,2,3 …, L is the pipe length, c is the sound velocity, and lambda is the peak noise wavelength; an integrated fixing bracket with a waist hole is arranged on the outer side of the silencing pipe; the plug is arranged at the tail end of the silencing pipe in a threaded structure, and the middle of the plug is provided with an inner hexagonal groove. The invention eliminates the peak noise of the gas in the vent pipe by utilizing the standing wave resonance principle of the sound wave in the muffler pipe, and can eliminate the noise of two or more corresponding peak frequencies by welding two or more muffler pipes on the vent pipe. The pipe type silencer provided by the invention has the advantages of simple structure, convenience in assembly and integration with other components, convenience in maintenance, good reliability and remarkable noise elimination effect, and is easy and convenient to operate.
Description
Technical Field
The invention belongs to the technical field of noise control, and particularly belongs to the field of noise control of an air inlet pipeline system of a light commercial vehicle.
Background
With the rapid development of the automobile industry in recent years, the country enforces the noise and third-stage fuel consumption standard control on the whole light commercial vehicle.
At present, air inlet noise exists in an air inlet pipeline of a light commercial vehicle, and the speed pulsation or pressure pulsation excitation of gas in the pipeline can cause the air inlet of the reciprocating compressor to generate gas sound radiation, namely the air inlet noise; the rear end of an air inlet pipeline of the air compressor is connected with a bleed air pipe, and a grid of the bleed air pipe is communicated with an atmosphere end, so that air inlet noise generated by the air inlet pipeline can be amplified after passing through the bleed air pipe. The peak frequency noise generated in the air inlet pipeline system has great influence on the comfort and environment of a driver, so that the elimination of the peak frequency noise in the air inlet pipeline has important practical significance.
The invention patent with publication number CN111219562A discloses a pipeline silencer, which comprises a shell and a magnetic silencing sheet mounted on the shell, wherein the magnetic silencing sheet comprises a magnet perforated plate, glass cloth and filler. The invention with publication number CN105587689A provides a pipeline silencer, which comprises an air inlet pipe, an air outlet pipe, a silencing pipe, at least two silencing partition plates and a silencer shell, wherein the inner cavity of the shell is divided into at least three chambers by the silencing partition plates, the silencing pipe bypasses in each chamber, and ideal silencing effect is achieved by continuously weakening sound waves in the process of airflow bypassing in the silencing pipe by using the principles of pipeline division and gradual silencing and noise reduction.
Disclosure of Invention
In order to solve the problems in the background art, the invention provides a tubular muffler for an automobile, which can effectively eliminate peak frequency noise generated in an air inlet pipeline.
A tubular muffler for an automobile is characterized in that a muffler pipe and a vent pipe are connected together through a tee joint, a plug is arranged at the tail end of the muffler pipe, the length of the muffler pipe meets the formula L (2n-1) c/4 lambda, wherein n is 1,2 and 3 …, L is the pipe length, c is the sound velocity, and lambda is the peak noise wavelength.
The outer side of the silencing pipe is provided with an integrated fixing support, and a waist hole is formed in the integrated fixing support.
The plug is arranged at the tail end of the silencing pipe in a threaded structure, and the middle of the plug is provided with an inner hexagonal groove.
The diameter of the silencing tube is preferably 25 mm.
Furthermore, the three-way joint, the vent pipe and the muffler pipe are all welded, the integrated fixing support is welded on the muffler pipe, and the strength and the reliability of the structure are enhanced by adopting a welding mode.
Compared with the prior art, the invention can eliminate the peak frequency noise of the gas in the vent pipe by utilizing the standing wave resonance principle of the sound wave in the muffling pipe. The silencing pipe can be integrally, conveniently and firmly installed at a designated position of an automobile through the integrated fixing support with the waist hole. The hexagonal socket in the middle of the plug is convenient for the plug to be installed at the tail end of the silencing pipe, the plug is connected through an internal thread structure, sealing is firm, water or impurities can be prevented from entering a pipeline, and the plug is convenient to disassemble for inspection, cleaning, maintenance and repair. In addition, two or more kinds of silencing pipes can be welded on the ventilating pipe through a tee joint, so that the noise of two or more kinds of peak frequencies can be eliminated correspondingly. The pipe type silencer provided by the invention has the advantages of simple structure, convenience in assembly and integration with other components, convenience in maintenance, good reliability and remarkable noise elimination effect, and is easy and convenient to operate.
Drawings
Fig. 1 is a front view schematically showing a pipe muffler for an automobile.
Fig. 2 is an isometric view of a tubular muffler for an automobile.
Fig. 3 is an enlarged view of the bulkhead.
Wherein: 1-a breather pipe; 2-a muffler pipe; 3-a three-way joint; 4.1-fixing the support; 4.2-integrated fixed support; 5-plug; 5.1-inner hexagonal groove.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific embodiments, it is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention. The positional relationships described in the embodiments are all in accordance with those shown in the drawings.
As shown in fig. 1 and 2, in a tubular muffler for an automobile, two three-way joints 3 are welded on a vent pipe 1, two muffling pipes 2 are respectively welded on the two three-way joints 3, and plugs 5 are respectively installed at the ends of the muffling pipes 2. As shown in fig. 3, an inner hexagonal groove 5.1 is formed in the middle of the plug 5, matching threads are formed in the outer side of the plug 5 and the tail end of the muffling tube 2, and the plug 5 can be very simply and conveniently mounted at the tail end of the muffling tube 2 by using a hexagonal wrench.
As shown in fig. 1 and 2, a fixed support 4.1 is welded in the middle of two tee joints 3 of the vent pipe 1, the fixed support 4.1 is of a sheet structure, and a round hole 4.4 is formed in the fixed support 4.1; the outside welding of two muffler pipes 2 has integrated fixed bolster 4.2, and integrated fixed bolster 4.2 also is sheet structure, has seted up waist hole 4.3 on the integrated fixed bolster 4.2, consequently adopts the bolt can be with the whole firm installation of breather pipe 1 and muffler pipe 2 on the assigned position of car, and in addition, the design of waist hole 4.3 does not have high expectations for the precision of car installation position, the installation of the tubular muffler of being more convenient for.
The length of the muffling tube 2 is designed by utilizing the standing wave resonance principle of gas in the pipeline, the length of the muffling tube satisfies the formula L ═ 2n-1) c/4 lambda, wherein n ═ 1,2,3 …, L is the tube length, c is the sound velocity, lambda is the peak noise wavelength, and the diameter of the muffling tube 2 is preferably 25 mm.
In a certain vehicle type, the actually measured air inlet pipe 1 of the whole vehicle air compressor has two peak noise frequencies of 200Hz and 212.5Hz, so that two silencing pipes 2 are needed to be arranged for eliminating peak noise, and the diameters of the silencing pipes 2 are 25 mm.
The lengths of the two silencing tubes 2 are L respectively1And L2：
L1＝(2-1)*340*1000/4/200(mm)＝425mm，n＝1；
L2＝(2-1)*340*1000/4/212.5(mm)＝400mm，n＝1。
Therefore, two silencing pipes 2 with dead ends and the lengths of 400mm and 425mm are arranged on the main pipeline of the air inlet pipe 1, and the two peak noise frequencies of 200Hz and 212.5Hz can be eliminated.
The foregoing is illustrative of the present invention and is not to be construed as limited to the specific embodiments thereof. The invention is in the scope of protection only if various improvements are made by the method conception and the technical scheme of the invention, or the method is directly applied to other occasions without improvement.
Claims (4)
1. A tubular muffler for an automobile, comprising a muffler pipe (2), characterized in that: the silencer is characterized in that the silencer pipe (2) and the vent pipe (1) are connected together through a tee joint (3), a plug (5) is arranged at the tail end of the silencer pipe (2), the length of the silencer pipe (2) meets the formula L (2n-1) c/4 lambda, wherein n is 1,2 and 3 …, L is the pipe length, c is the sound velocity, and lambda is the peak noise wavelength.
2. The pipe muffler for an automobile as set forth in claim 1, wherein: an integrated fixing support (4.2) is arranged on the outer side of the muffling pipe (2), and a waist hole (4.3) is formed in the integrated fixing support (4.2).
3. The pipe muffler for an automobile as set forth in claim 1, wherein: the plug (5) is arranged at the tail end of the silencing pipe (2) in a threaded structure, and the middle of the plug (5) is provided with an inner hexagonal groove (5.1).
4. The pipe muffler for an automobile as set forth in claim 1, wherein: the diameter of the silencing tube (2) is preferably 25 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110002781.8A CN112746879A (en) | 2021-01-04 | 2021-01-04 | Tubular silencer for automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110002781.8A CN112746879A (en) | 2021-01-04 | 2021-01-04 | Tubular silencer for automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112746879A true CN112746879A (en) | 2021-05-04 |
Family
ID=75649696
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110002781.8A Pending CN112746879A (en) | 2021-01-04 | 2021-01-04 | Tubular silencer for automobile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112746879A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11311179A (en) * | 1998-04-28 | 1999-11-09 | Matsushita Refrig Co Ltd | Enclosed type electric compressor |
| CN2608695Y (en) * | 2003-04-21 | 2004-03-31 | 吴渊军 | Exhaust silencing apparatus for internal combustion engine |
| CN205956554U (en) * | 2016-06-30 | 2017-02-15 | 绵阳华瑞汽车有限公司 | Automobile air conditioner pipeline mount |
| CN108999679A (en) * | 2018-08-11 | 2018-12-14 | 卢昌鹏 | A kind of exhaust system |
| CN109059130A (en) * | 2018-09-12 | 2018-12-21 | 奥克斯空调股份有限公司 | A kind of exhaust pipe structure and air conditioner |
| CN211525037U (en) * | 2020-01-06 | 2020-09-18 | 中国重汽集团济南动力有限公司 | Air inlet noise silencer of single-cylinder air compressor of diesel engine |
-
2021
- 2021-01-04 CN CN202110002781.8A patent/CN112746879A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11311179A (en) * | 1998-04-28 | 1999-11-09 | Matsushita Refrig Co Ltd | Enclosed type electric compressor |
| CN2608695Y (en) * | 2003-04-21 | 2004-03-31 | 吴渊军 | Exhaust silencing apparatus for internal combustion engine |
| CN205956554U (en) * | 2016-06-30 | 2017-02-15 | 绵阳华瑞汽车有限公司 | Automobile air conditioner pipeline mount |
| CN108999679A (en) * | 2018-08-11 | 2018-12-14 | 卢昌鹏 | A kind of exhaust system |
| CN109059130A (en) * | 2018-09-12 | 2018-12-21 | 奥克斯空调股份有限公司 | A kind of exhaust pipe structure and air conditioner |
| CN211525037U (en) * | 2020-01-06 | 2020-09-18 | 中国重汽集团济南动力有限公司 | Air inlet noise silencer of single-cylinder air compressor of diesel engine |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210504 |